superci 0.19.3

Your SuperCI dashboard, on your machine: puts a control plane in your own cloud and runs GitHub Actions jobs on your AWS or Cloudflare
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//! SuperCI's commands: what the dashboard's pages do, from a terminal or a coding agent. A command that changes
//! something fills in the form its page has and hands it to the dashboard's own code (`Dashboard::act`), so the two
//! cannot differ; one that reads shows what the control plane says. Nothing is ever asked in the terminal: what a
//! person must do first (a sign-in, in the browser) is said, with the command for it, and the status is 3.
use std::collections::HashMap;

use serde_json::{json, Value};

use crate::dashboard::{day_of, job_start_lines, job_words, plane_json, read_keys, run_words, runs_of, with_hosts, Background, Dashboard, Task, AWS_ENDED, NOT_SIGNED_IN};
use crate::plane::Plane;
use crate::view::{PlaneView, DASHBOARD_VERSION};
use crate::store;

/// What help is made of: a resource by its name, its commands (a resource, an operation, then what it takes), and
/// what more `superci help <resource>` says. The shape is the Stripe CLI's: `superci <resource> <operation> [id]
/// [--param=value]`, the operations `list`, `retrieve`, `create`, `update` and `delete` wherever they fit. A cloud or a
/// code host is never a command of its own (there will be many of each): it is what an operation takes (`superci
/// runners create aws`, `superci accounts retrieve aws`, `superci connections create github OWNER`).
const HELP: &[(&str, &str, &str)] = &[
    ("dashboard", "  superci dashboard                 Opens your dashboard in the browser (on this machine only, while it runs).",
        "Set up or find SuperCI in your cloud, connect repositories and runner providers, and see your jobs. It opens signed in\nonce you have signed in before. Ctrl-C stops it; your runners keep working without it. With several workspaces it opens on the\none shown last, and the name at the top of its sidebar switches between them.\n\n  --no-browser    Prints its link without opening it."),
    ("login", "  superci login [CLOUD]             Signs in with a cloud in the browser (aws, cloudflare, modal), and ends.",
        "A person signs in once; SuperCI keeps that sign-in in its own folder (~/.superci, by workspace) and commands use it\nfrom then on.\nWithout a cloud, the first screen asks which. AWS ends a sign-in after twelve hours at most: looking still works\nafter that, and a change in AWS asks for `superci login aws` again. A sign-in adds an account beside the others:\n`superci login aws --add` signs in to one more AWS account.\n\n  --no-browser    Prints the link without opening it.\n  --add           One more AWS account, beside those signed in to."),
    ("logout", "  superci logout                    Removes SuperCI's sign-ins from this machine (the workspace's).",
        "It also asks Cloudflare to end its sign-in, and the control plane to forget this machine's key. Your control plane\nand runners keep working."),
    ("status", "  superci status                    The control plane in use: where, its version, whether jobs can run.",
        "With --json: the control plane, and under \"status\" everything it says of itself (repositories, runner providers,\nlimits, the latest jobs)."),
    ("jobs", "  superci jobs list\n  superci jobs retrieve ID [--bytes=N]",
        "list      The latest jobs: each one's id, how it ended, where it ran, how long, its cost, and why it failed.\nretrieve  One job: how its start went step by step (what AWS was asked and answered, when its machine booted, when\n          its runner listened), and the end of its log: GitHub's (read with your App's token) or GitLab's, as far back as --bytes\n          says (200000 unless given, four million at most; the dashboard's Raw log gives a GitHub job's whole). GitHub keeps a job's log once the job has ended."),
    ("runs", "  superci runs list\n  superci runs retrieve ID",
        "A run is a workflow's jobs together (on GitLab, a pipeline's).\n\nlist      The latest runs: each one's id, how it stands, how many of its jobs ran here, how long it took (from its\n          first job queued to its last one over), what its machines cost together, and the job that was over last:\n          the one the run waited for.\nretrieve  One run with its jobs (every attempt of it, when it was run again).\ncreate    Runs a workflow's job from this computer, as GitHub would run it, on a machine as any job here: the working\n          tree as it is (what git tracks, and new files it does not ignore), with nothing pushed. --workflow=FILE runs its\n          jobs (each combination of a matrix a job of its own, each job once those it needs have ended); --job=NAME\n          runs that job and those it needs. --event=push|pull_request (push unless given), and what GitHub would give\n          it and cannot here: --secret=NAME=VALUE and --var=NAME=VALUE, as often as needed. It waits for the run and\n          prints its jobs' lines; it fails when the run does.\n\nOnly the jobs SuperCI ran are counted: a run's jobs on other runners are not known here."),
    ("planes", "  superci planes list\n  superci planes create aws --region=us-east-1 [--account=ID] | cloudflare [--account=ID] | modal\n  superci planes update [ID]\n  superci planes move ID\n  superci planes allow [ID]\n  superci planes delete ID --confirm",
        "list      Every control plane found in the clouds signed in to. One is in use at a time.\ncreate    Puts a control plane in a cloud you are signed in to. Nothing else is needed first.\nupdate    Brings the control plane in use (or the one named) to this program's version.\nmove      Moves to another control plane you created: settings, history and runner providers go along, then\n          GitHub and GitLab are switched over. No job is lost.\nallow     Gives its AWS role what this version asks for (the dashboard's Control plane → Permissions → Allow).\ndelete    Deletes one that is not in use, with what was made for it in its cloud."),
    ("runners", "  superci runners list\n  superci runners create aws [--region=us-east-1] | cloudflare [--account=ID] | modal\n  superci runners update CLOUD [--max-jobs=N|none] [--monthly-usd=N|none] [--enabled=true|false]\n                               [--regions=a,b,c] [--networks=\"REGION subnet-… sg-… [private]\"|none]\n                               [--location=enam|weur|auto|…] [--image=https://…|none]\n  superci runners order CLOUD...\n  superci runners delete CLOUD --confirm [--only-here] [--stop-jobs]",
        "list      Runner providers in order, with their limits.\ncreate    Lets a cloud you are signed in to run jobs. --region: where AWS machines start, for a control plane that\n          is not in AWS itself.\nupdate    A provider's limits: jobs at once, dollars a month (`none` lifts one). --enabled: aws-on-demand only.\n          --regions and --networks are AWS's (a network of your own per region; give --networks once per region),\n          --location and --image Cloudflare's.\norder     aws (its spot machines), aws-on-demand, cloudflare, modal. A job goes to the first that can run it and is\n          within its limits; when one cannot start it, to the next.\ndelete    Takes it out and deletes what SuperCI made for it there. --only-here: forgets it without deleting its\n          part (for when you cannot sign in there). --stop-jobs: also when jobs are running on it."),
    ("labels", "  superci labels list\n  superci labels create NAME\n  superci labels delete NAME --confirm",
        "The labels workflows name in `runs-on`: a list, `superci` alone unless you add others. A workflow may name any\nof them (`runs-on: acmeci`, `acmeci/cpu=8`).\n\ncreate    Adds NAME to the list: 2 to 24 lowercase letters and digits. It becomes the one shown in examples.\ndelete    Stops answering to NAME: jobs that still name it wait for a runner that never comes. The last one stays."),
    ("name", "  superci name retrieve\n  superci name update NAME",
        "What your CI is called where people read it: the dashboard's header, the GitHub App's name for an organization\nadded from then on, and what a job's page says when it could not be run. SuperCI unless you name it.\n\nupdate    Calls it NAME (\"AcmeCI\", \"Acme CI\"): 2 to 24 letters, digits, spaces and dashes. `SuperCI` puts it back.\n          The command stays `superci`; what workflows name is `superci labels`."),
    ("machine", "  superci machine retrieve\n  superci machine update [--cpu=N] [--ram=GB] [--disk=GB] [--disk-speed=MIBS] [--disk-iops=N] [--arch=x64|arm64]\n                         [--os=linux|windows] [--gpu=any|NAME] [--family=m8a+r8a] [--scratch=ramdisk|localdisk]\n                         [--provider=aws|cloudflare|modal] [--spot=true|false]",
        "The machine `runs-on: superci` alone gets. A job's label says another with the same keys, as key=value pairs\nafter its name: `superci/cpu=8/arch=arm64`. What a label leaves out is the default machine's.\n\nEach flag is a key (see superci.dev/docs/labels). `--KEY=default` leaves one to each provider's standard again.\n\n--disk-speed  On AWS a disk's speed follows the machine's size (31.25 MiB a second for each CPU, up to 1,000; the\n              extra is in a job's price). 125 is what AWS includes at no extra price; a number sets it (125 to\n              2000).\n--spot        false: never a spot machine. --scratch: a job's files in memory or on a machine's own disk.\n--family      Only these AWS machine families. --provider: only this provider."),
    ("limits", "  superci limits retrieve\n  superci limits update [--max-cpu=N] [--max-hours=N] [--monthly-usd=N|none] [--daily-usd=N|none]",
        "--monthly-usd The most the CI may spend on machines in a month, all providers together (no limit unless set).\n              At it no job starts until next month or a higher limit. A cloud account's own limit is\n              `superci accounts update aws --monthly-usd=N`; a provider's, `superci runners update`.\n--daily-usd   The same for a day (UTC): a day that runs away stops that day.\n--max-cpu     The largest machine a label may ask for (32 unless set). A label asking for more is refused.\n--max-hours   The longest a job may run: its machine is ended after this (6 unless set, as on GitHub's own runners;\n              120 at most). Whatever is set, a machine on Cloudflare lives 6 hours at most and one on Modal 24. A\n              workflow's timeout-minutes ends a job sooner."),
    ("public_repos", "  superci public_repos list\n  superci public_repos create OWNER/REPO\n  superci public_repos delete OWNER/REPO",
        "Public repositories allowed to run here. Jobs from public repositories are refused unless the repository is allowed.\nEven then, a fork's pull request and `pull_request_target` runs are refused."),
    ("connections", "  superci connections list\n  superci connections create github OWNER [--host=https://github.example.com]\n  superci connections create gitlab --url=https://gitlab.com [--gitlab=ID|new]\n  superci connections delete github OWNER --confirm\n  superci connections delete gitlab [ID] --confirm",
        "Where jobs come from: the GitHub accounts and the GitLabs connected.\n\nlist      Each GitHub account with where its App is installed, and each GitLab.\ncreate    github: opens GitHub in the browser, where a person creates the App for OWNER (an organization, or your\n          own name) and chooses its repositories. GitHub offers that nowhere else. It ends when the App is\n          installed. --host: a GitHub Enterprise Server, or GitHub Enterprise Cloud with data residency.\n          gitlab: the token is read from SUPERCI_GITLAB_TOKEN (--token-env=NAME for another variable): a project,\n          group or personal access token with the scopes api, create_runner and manage_runner. It goes to your\n          control plane and is not kept on this machine. --gitlab=new: a further connection beside the first.\ndelete    github: a further organization; its App is uninstalled and forgotten (the first one goes with\n          `superci leave`). gitlab: its projects stop sending jobs here, and its token is forgotten."),
    ("deliveries", "  superci deliveries list\n  superci deliveries retrieve ID",
        "What GitHub says of the events it sent your control plane lately: for a job that never got a machine.\n\nlist      The newest hundred: when, what (a job queued, begun, ended), and how it was answered. A job that is in no\n          line was never sent by GitHub; the control plane finds such jobs by asking, within a few minutes.\nretrieve  One of them, with the job it was about, the address it was sent to and what was answered."),
    ("projects", "  superci projects list [--gitlab=ID]\n  superci projects update PROJECT_ID --enabled=true|false [--gitlab=ID]\n  superci projects update --all --enabled=true [--gitlab=ID]",
        "The projects a GitLab connection's token reaches (on GitHub, repositories are chosen where the App is installed).\n\nlist      Each with its id and whether its jobs come here.\nupdate    --enabled=true: the project's jobs with `tags: [superci]` run here from then on."),
    ("accounts", "  superci accounts list\n  superci accounts retrieve aws [--account=ID]\n  superci accounts update aws [--monthly-usd=N|none] [--daily-usd=N|none]\n                              [--aws-budget=none|emails|stops|lift] [--email=ADDRESS]",
        "list      The cloud accounts signed in to: each cloud, its account, and who is signed in.\nupdate    The most the AWS account may spend on machines in a month and in a day (UTC), its spot and on-demand\n          machines together (`none` lifts one). At a limit, jobs go to the providers of other accounts in the\n          order. The whole CI's limits are `superci limits update`.\n          --aws-budget: a budget in the AWS account itself for the monthly limit, made with your sign-in (the\n          control plane gets no permission for it). AWS counts the account's real bill, all of it and hours late.\n          emails: AWS writes to --email at 80% and at 100%. stops: that, and at 100% AWS refuses new machines to\n          the control plane until the next month. lift: takes that refusal off now. none: removes all of it.\nretrieve  What an AWS account allows of what SuperCI does there: the regions, spot and on-demand machines, how many\n          vCPUs it may run at once, and whether the image jobs run on is published there. It is asked with reads and\n          dry runs only: nothing is made, started or changed. An account in an AWS organization can be held to some\n          regions or kept from spot by the organization's policies, which nothing inside the account lifts; this\n          says so, with the policy and whose it is. --account: which, when signed in to several."),
    ("usage", "  superci usage retrieve [--period=day|week|month]",
        "What jobs used in the last 24 hours (day, unless given), 7 days or 30 days: how many ran, their machines' minutes and\nthe minutes GitHub or GitLab would bill (each job rounded up to a minute), what they cost, and what the code host's\nown runners of the same sizes would have charged."),
    ("artifacts", "  superci artifacts list --run=ID\n  superci artifacts retrieve NAME --run=ID [--out=DIR]",
        "What a run from a computer's jobs kept with upload-artifact, kept for a day. (A run of GitHub's keeps its artifacts at\nGitHub: `gh run download`.)\n\nlist      Each artifact's name and size.\nretrieve  Fetches one and unpacks it into DIR (./NAME unless given), as download-artifact would."),
    ("caches", "  superci caches retrieve\n  superci caches list [--repo=OWNER/NAME]\n  superci caches update [--enabled=true|false] [--size-gb=N] [--days=N]\n  superci caches delete --repo=OWNER/NAME [KEY] [--scope=REF] --confirm",
        "GitHub's cache for jobs on AWS, kept in a bucket of your control plane's in your account, in each region its machines\nrun in. Workflows do not change: actions/cache, the setup actions' caches and Docker's type=gha reach it as they reach\nGitHub's. A job reads and writes what GitHub would let it (a pull request writes only its own branch's).\n\nretrieve  Whether it is on, what it keeps, and each repository with what it keeps now.\nlist      Each repository with its entries and size; --repo: that repository's entries (key, branch, size, last use).\nupdate    --enabled=false: jobs use GitHub's own cache. --size-gb: what one repository keeps at most (25 unless set;\n          the least recently used go first). --days: how long an entry may go unused (7 unless set). An entry saved 30\n          days ago is saved anew whatever its use.\ndelete    Takes a repository's entries out, all of them or KEY's (--scope: on that branch only, as refs/heads/main)."),
    ("keys", "  superci keys list\n  superci keys create NAME [--days=30] [--runs]\n  superci keys delete NAME",
        "Keys that only read, for a coding agent or a script.\n\ncreate    Makes a key and shows it once. With it and the control plane's address, anything that looks works with no\n          sign-in on that machine, and nothing can be changed:\n            SUPERCI_PLANE=https://… SUPERCI_KEY=superci_read_… superci jobs list\n          Only the key's SHA-256 is kept, in your control plane. It ends by itself (30 days unless --days says\n          otherwise, 366 at most).\n          With --runs, the key also starts runs from a computer (`superci runs create`), and nothing else. Its jobs keep\n          to this control plane's limits, as every job does (`superci limits`). For a coding agent that should run the\n          tests without pushing and without your sign-in.\ndelete    Ends one at once."),
    ("images", "  superci images list [--account=ID]\n  superci images create REGION [--from=REGION:IMAGE] [--account=ID]\n  superci images update REGION [--account=ID]\n  superci images delete REGION --confirm [--account=ID]",
        "The image AWS machines start from (GitHub's own runner image, published for AWS by RunsOn in most regions).\n\nlist      Each region the AWS account can use: whether the image is published there, or your own copy is.\ncreate    Copies the image into a region it is not published in, so that jobs can start there. Where to copy\n          from is read from its maker's public list; --from names a region and an image instead. AWS takes about\n          ten minutes. The copy is kept in your account's storage there (about $1.50 a month).\nupdate    Copies the newest build in, where your copy is of an older one (its maker builds the image anew every\n          week or two; `list` says when one is out). Jobs start from the older copy until the new one is\n          there; the older one is then removed.\ndelete    Removes your copy from a region, with its storage."),
    ("workspaces", "  superci workspaces list\n  superci workspaces create NAME\n  superci workspaces update ID --id=NEW\n  superci workspaces delete ID --confirm",
        "A workspace has its own sign-ins to its clouds, and through them its own control plane, runners and repositories.\nNothing of one is seen from another. There is one (`default`) until you make more. With several, a command says\nwhich, by its id: --workspace=ID, or SUPERCI_WORKSPACE=ID for a whole terminal. A command that names none stops\nand lists them.\n\ncreate    Makes an empty one called NAME (AcmeCI, Build Farm), which its CI is called too. Its id is made from the\n          name (acmeci, build-farm). Then `superci login --workspace=ID`.\nupdate    Gives one another id. What it is called is `superci name update`.\ndelete    Signs it out and forgets it on this machine. Nothing in its clouds is deleted: its control plane and\n          runners keep working (`superci leave --workspace=ID --confirm` stops them first)."),
    ("leave", "  superci leave --confirm           Stops using SuperCI: what it made in your clouds is deleted.",
        "GitHub and GitLab stop sending jobs, then the control plane is deleted with what was made for it, and with it the\nones that serve nothing. Another one that serves a code host of its own is left as it is: `--plane=ID` stops that\none by itself. The GitHub App itself is deleted on GitHub; change `runs-on: superci` back in your workflows first.\nWith several workspaces it takes --workspace=ID on the command itself, never from SUPERCI_WORKSPACE."),
];

const FLAGS: &str = "  --param=value      What an operation takes (also `--param value`). An id or a name comes before the flags.
  --workspace=ID     Which workspace, when several are kept on this machine (see `superci help workspaces`).
  --json             One JSON object: what was done or read, or \"error\" with \"needs\" (the command a person runs first).
  --dry-run          Checks a change and says what it would do, without doing it.
  --confirm          Needed by what deletes something. Nothing is ever asked in the terminal.

Status: 0 done · 1 failed · 2 not a command, or not a whole one · 3 a person is needed first (see \"needs\").";

/// `superci help`, `superci help RESOURCE`, `superci RESOURCE --help`, and a resource alone.
pub fn help(topic: &str) -> String {
    match HELP.iter().find(|(word, ..)| *word == topic) {
        Some((_, usage, more)) => format!("{usage}\n{}\n{FLAGS}", if more.is_empty() { String::new() } else { format!("\n{more}\n") }),
        None => {
            let group = |words: &[&str]| HELP.iter().filter(|(w, ..)| words.contains(w)).map(|(_, usage, _)| *usage).collect::<Vec<_>>().join("\n");
            format!("SuperCI — GitHub Actions and GitLab CI jobs on your own clouds

  superci <resource> <operation> [id] [--param=value]

{}

Jobs:
{}

Control plane:
{}

Runners:
{}

Repositories:
{}

Coding agents and scripts:
{}

Workspaces:
{}

{}

  superci help RESOURCE             More about one (also: superci RESOURCE --help).

{FLAGS}
SuperCI keeps its own sign-ins in ~/.superci (SUPERCI_HOME to put it elsewhere), by workspace, and reads no other
tool's. On a machine with no browser, a sign-in can be given by name: SUPERCI_CLOUDFLARE_TOKEN, SUPERCI_MODAL_TOKEN_ID and
SUPERCI_MODAL_TOKEN_SECRET.", group(&["dashboard", "login", "logout", "status"]), group(&["jobs", "runs", "artifacts", "usage"]), group(&["planes"]), group(&["runners", "accounts", "images", "labels", "name", "machine", "limits", "caches"]),
                group(&["connections", "deliveries", "projects", "public_repos"]), group(&["keys"]), group(&["workspaces"]), group(&["leave"]))
        }
    }
}

/// How a command did not do its thing: it was not a whole command (its resource's help follows), it would delete
/// something and was not told to, or it failed.
#[derive(Debug, PartialEq)]
pub enum Fail { Usage(String), Unconfirmed(String), Failed(String) }

impl From<String> for Fail { fn from(e: String) -> Self { Fail::Failed(e) } }
impl From<&str> for Fail { fn from(e: &str) -> Self { Fail::Failed(e.to_string()) } }

impl Fail {
    pub fn said(&self) -> &str { match self { Fail::Usage(e) | Fail::Unconfirmed(e) | Fail::Failed(e) => e } }
}

type Result<T> = std::result::Result<T, Fail>;

fn usage<T>(say: impl Into<String>) -> Result<T> { Err(Fail::Usage(say.into())) }

/// What was typed: words, and flags with their values (`--region us-east-1`, `--region=us-east-1`; a flag given
/// twice keeps both).
pub struct Args { pub words: Vec<String>, flags: HashMap<String, Vec<String>> }

/// Flags that stand alone; every other flag takes the word after it.
const SWITCHES: [&str; 11] = ["json", "confirm", "dry-run", "no-browser", "all", "only-here", "stop-jobs", "help", "version", "add", "runs"];
const VALUES: [&str; 47] = ["period", "run", "out", "repo", "scope", "size-gb", "secret", "var", "workflow", "job", "event", "disk-speed", "workspace", "id", "from", "daily-usd", "aws-budget", "email", "enabled", "spot", "disk-iops", "gpu", "family", "scratch", "provider", "max-hours", "days", "bytes", "region", "account", "plane", "host", "url", "gitlab", "max-jobs", "monthly-usd", "regions", "networks", "location", "image", "cpu", "ram", "disk", "arch", "os", "max-cpu", "token-env"];

impl Args {
    pub fn parse(raw: &[String]) -> Result<Args> {
        let (mut words, mut flags) = (vec![], HashMap::<String, Vec<String>>::new());
        let mut it = raw.iter();
        while let Some(a) = it.next() {
            let Some(flag) = a.strip_prefix("--") else {
                if a == "-h" { flags.entry("help".into()).or_default(); } else if a == "-V" { flags.entry("version".into()).or_default(); }
                else if a.starts_with('-') && a.len() > 1 { return usage(format!("{a} is not a flag of superci")) } else { words.push(a.clone()) }
                continue
            };
            let (name, given) = match flag.split_once('=') { Some((n, v)) => (n, Some(v.to_string())), None => (flag, None) };
            if SWITCHES.contains(&name) { flags.entry(name.into()).or_default(); }
            else if VALUES.contains(&name) {
                let value = match given { Some(v) => v, None => match it.next() { Some(v) => v.clone(), None => return usage(format!("--{name} needs a value")) } };
                flags.entry(name.into()).or_default().push(value);
            } else { return usage(format!("--{name} is not a flag of superci")) }
        }
        Ok(Args { words, flags })
    }
    pub fn has(&self, flag: &str) -> bool { self.flags.contains_key(flag) }
    fn get(&self, flag: &str) -> Option<&str> { self.flags.get(flag).and_then(|v| v.last()).map(String::as_str) }
    fn all(&self, flag: &str) -> Vec<&str> { self.flags.get(flag).map(|v| v.iter().map(String::as_str).collect()).unwrap_or_default() }
    pub fn word(&self, i: usize) -> &str { self.words.get(i).map(String::as_str).unwrap_or("") }
}

/// What a command did or read: lines for a person, and the same as data.
pub struct Done { pub said: Vec<String>, pub data: Value }

/// How a command marks a line a job wrote among its steps: printed as it is, with nothing added.
pub const JOB_LINE: &str = "\u{1}";

impl Done {
    fn said(line: impl Into<String>) -> Done { let line = line.into(); let line = if line.is_empty() { "Done.".to_string() } else { line }; Done { data: json!({ "ok": true, "said": line }), said: vec![line] } }
}

/// The command a person runs first, when that is what an error asks for.
pub fn needs(error: &str) -> Option<&'static str> {
    if error == NOT_SIGNED_IN { return Some("superci login") }
    let has = |words: &[&str]| words.iter().any(|w| error.contains(w));
    if error == AWS_ENDED || has(&["Sign in with AWS", "Your AWS sign-in has ended", "ExpiredToken", "RequestExpired"]) { return Some("superci login aws") }
    if has(&["Sign in with Cloudflare", "Cloudflare sign-in expired", "Cloudflare sign-in has expired"]) { return Some("superci login cloudflare") }
    if has(&["Sign in with Modal", "Modal sign-in is no longer accepted", "Modal no longer accepts"]) { return Some("superci login modal") }
    if has(&["Sign in where this control plane runs", "sign in where it runs", "needs SuperCI's own sign-in"]) { return Some("superci login") }
    None
}

const CLOUDS: [&str; 3] = ["aws", "cloudflare", "modal"];
const NO_PLANE: &str = "There is no control plane yet. Set one up: `superci planes create aws --region=us-east-1` (or cloudflare, or modal).";

const ONLY_READS: &str = "SUPERCI_KEY only reads. A change needs SuperCI's own sign-in on this machine: `superci login`.";

thread_local! {
    /// The workspace this command is in (see `enter`). None: nothing is kept for it (no home folder, or a key that
    /// only reads, given by name, is all it uses).
    static IN: std::cell::RefCell<Option<String>> = const { std::cell::RefCell::new(None) };
}

/// One workspace, or several with none named.
enum Which { One(Option<String>), Several(Vec<String>) }

/// Which workspace a command is in: `--workspace=NAME`, then SUPERCI_WORKSPACE (not for `flag_only`: what deletes
/// everything takes it from the command itself); with neither, the only one. A name that is none of those kept here
/// stops the command and never falls through to another.
fn which_workspace(args: &Args, flag_only: bool) -> Result<Which> {
    let Some(root) = store::root() else { return Ok(Which::One(None)) };
    let var = std::env::var("SUPERCI_WORKSPACE").ok().map(|v| v.trim().to_string()).filter(|v| !v.is_empty()).filter(|_| !flag_only);
    let (named, by) = match args.get("workspace").map(str::trim).filter(|w| !w.is_empty()) { Some(w) => (Some(w.to_string()), "--workspace"), None => (var, "SUPERCI_WORKSPACE") };
    match store::which(&root, named.as_deref()) {
        Ok(name) if named.is_none() || store::kept_here(&root, &name) => Ok(Which::One(Some(name))),
        Ok(name) => {
            let all = store::workspaces_in(&root);
            let here = if all.is_empty() { "the only one is default".to_string() } else { format!("here: {}", all.join(", ")) };
            Err(Fail::Failed(format!("{by} names the workspace {name}, and none is called that on this machine ({here}). Nothing was done. `superci workspaces list` lists them.")))
        }
        Err(all) => Ok(Which::Several(all)),
    }
}

fn several_workspaces(all: &[String], flag_only: bool) -> Fail {
    Fail::Failed(format!("{} workspaces are kept on this machine: {}. Say which: --workspace=ID{}. Nothing was done.", all.len(), all.join(", "), if flag_only { " (on this command itself)" } else { " (or SUPERCI_WORKSPACE=ID)" }))
}

/// Puts a command in its workspace, before it does anything. With several and none named it stops and lists them,
/// unless a key that only reads was given by name: that reads its control plane and uses nothing of a workspace.
fn enter(args: &Args) -> Result<()> {
    let flag_only = args.word(0) == "leave";
    let name = match which_workspace(args, flag_only)? {
        Which::One(name) => name,
        Which::Several(_) if given_key().is_some() => None,
        Which::Several(all) => return Err(several_workspaces(&all, flag_only)),
    };
    IN.with(|w| *w.borrow_mut() = name);
    Ok(())
}

fn signed_in() -> Dashboard { Dashboard::signed_in(IN.with(|w| w.borrow().clone()).and_then(|w| store::Store::of(&w))) }

/// A dashboard ready for a change: signed in, its clouds looked in, the control plane in use chosen.
fn ready() -> Result<Dashboard> {
    let mut d = signed_in();
    if d.signed_in_as().is_none() && given_key().is_some() { return Err(ONLY_READS.into()) }
    d.ready()?;
    named_is_in_use(&d)?;
    Ok(d)
}

fn in_use(d: &Dashboard) -> Result<Plane> { Ok(d.plane_in_use().ok_or(NO_PLANE)?) }

thread_local! {
    /// The control plane a command was told to act on (`--plane=ID`, or `SUPERCI_PLANE` with no key), and where that
    /// was said. It is the one the command acts on (`view::name`); checked again where the command is about to act,
    /// so that a name that matches nothing stops it and never falls through to another control plane.
    static NAMED: std::cell::RefCell<Option<(String, &'static str)>> = const { std::cell::RefCell::new(None) };
}

/// Notes what this command names (see `NAMED`).
fn name_plane(args: &Args) {
    let var = |n: &str| std::env::var(n).ok().map(|v| v.trim().to_string()).filter(|v| !v.is_empty());
    let named = match args.get("plane").map(str::trim).filter(|p| !p.is_empty()) {
        Some(p) => Some((p.to_string(), "--plane")),
        // With a key the variable is the address that key reads (see `given_key`); alone it names the control plane.
        None if var("SUPERCI_KEY").is_none() => var("SUPERCI_PLANE").map(|p| (p, "SUPERCI_PLANE")),
        None => None,
    };
    crate::view::name(named.as_ref().map(|(p, _)| p.as_str()));
    NAMED.with(|n| *n.borrow_mut() = named);
}

/// Stops a command whose named control plane (its id, or its address) is not the one it would act on.
fn named_is(id: &str, url: &str, place: &str) -> Result<()> {
    let Some((named, by)) = NAMED.with(|n| n.borrow().clone()) else { return Ok(()) };
    if named == id || named.trim_end_matches('/') == url.trim_end_matches('/') { return Ok(()) }
    Err(Fail::Failed(format!("{by} names the control plane {named}, which is not among the control planes here (this would have acted on {id}, {place}). Nothing was done. `superci planes list` lists them.")))
}

fn named_is_in_use(d: &Dashboard) -> Result<()> {
    match d.plane_in_use() { Some(p) => named_is(p.plane_id(), p.url(), &p.place()), None => Ok(()) }
}

/// A dashboard ready to change a setting of the control plane in use (its limits, its order, its keys): as `ready`,
/// without looking through the clouds again when that control plane is known.
fn ready_to_set() -> Result<Dashboard> { let mut d = signed_in(); to_set(&mut d)?; Ok(d) }

/// The same, of a dashboard that has read already. A key that only reads is no sign-in, and is said to be none.
fn to_set(d: &mut Dashboard) -> Result<()> {
    if d.signed_in_as().is_none() && given_key().is_some() { return Err(ONLY_READS.into()) }
    d.ready_for_settings()?;
    named_is_in_use(d)
}

/// A key that only reads, given by name with its control plane's address (SUPERCI_PLANE, SUPERCI_KEY): what a coding
/// agent or a script is handed in place of the sign-ins.
fn given_key() -> Option<(String, String)> {
    let var = |n: &str| std::env::var(n).ok().map(|v| v.trim().to_string()).filter(|v| !v.is_empty());
    Some((var("SUPERCI_PLANE")?.trim_end_matches('/').to_string(), var("SUPERCI_KEY")?))
}

/// What a command that looks reads: the control plane, and the key it is read with. With a key given by name: that
/// control plane, with no sign-in. Else the one in use, with this machine's key.
fn look(d: &mut Dashboard) -> Result<(PlaneView, String)> {
    let Some((url, key)) = given_key() else {
        let v = d.current()?.ok_or(NO_PLANE)?;
        named_is(v.plane.plane_id(), v.plane.url(), &v.plane.place())?;
        return Ok((v, d.key().to_string()))
    };
    if !url.starts_with("https://") { return usage("SUPERCI_PLANE is the control plane's address, starting with https:// (`superci status` says it).") }
    let health = crate::cloudflare::health(&url).ok_or("The control plane at SUPERCI_PLANE did not answer.")?;
    let v = crate::view::plane_view(&Plane::Seen { url, plane_id: health["plane"].as_str().unwrap_or_default().to_string() }, Some(&key));
    if v.status.is_none() { return Err("The control plane did not take SUPERCI_KEY: it has ended, was revoked, or is another control plane's (keys that only read need control plane 0.11.0 or newer).".into()) }
    named_is(v.plane.plane_id(), v.plane.url(), "the one SUPERCI_PLANE and SUPERCI_KEY read")?;
    Ok((v, key))
}

fn view(d: &mut Dashboard) -> Result<PlaneView> { Ok(look(d)?.0) }

/// What deletes something needs --confirm (said with what it would do); --dry-run needs none.
fn confirmed(args: &Args, what: &str) -> Result<()> { if args.has("confirm") || args.has("dry-run") { Ok(()) } else { Err(Fail::Unconfirmed(format!("This would {what}. Add --confirm to do it, or --dry-run to check it first."))) } }

/// A flag that is true or false (`--enabled=true`). None: not given.
fn truth(args: &Args, flag: &str) -> Result<Option<bool>> {
    match args.get(flag) { None => Ok(None), Some("true") => Ok(Some(true)), Some("false") => Ok(Some(false)), Some(other) => usage(format!("--{flag} is true or false, not {other}.")) }
}

fn field(name: &'static str, value: impl Into<String>) -> (&'static str, String) { (name, value.into()) }

/// With --dry-run: what the command would do, after everything that can be checked without changing anything was
/// (the flags, the sign-in, the control plane). The form it would send is in the data, without any token.
fn dry(args: &Args, would: &str, path: &str, fields: &[(&str, String)]) -> Option<Done> {
    if !args.has("dry-run") { return None }
    let form: serde_json::Map<String, Value> = fields.iter().map(|(k, v)| (k.to_string(), if *k == "token" { "(given)".into() } else { v.clone().into() })).collect();
    Some(Done { said: vec![format!("Would {would}. Nothing was changed.")], data: json!({ "ok": true, "dry_run": true, "would": would, "form": { "to": path, "fields": form } }) })
}

/// Does what the page's form does, or with --dry-run returns from the command saying what it would do.
macro_rules! apply {
    ($d:expr, $args:expr, $would:expr, $path:expr, $fields:expr) => {{
        let (would, path, fields): (String, &str, &[(&str, String)]) = ($would.into(), $path, $fields);
        if let Some(done) = dry($args, &would, path, fields) { return Ok(done) }
        $d.act(path, fields)?
    }};
}

/// Runs a command that is not the dashboard itself. `steps` is told each step of a long one as it begins.
pub fn run(args: &Args, steps: &mut dyn FnMut(&str)) -> Result<Done> {
    let w = |i: usize| args.word(i);
    if w(0) == "workspaces" { return workspaces(args) }
    enter(args)?;
    name_plane(args);
    match (w(0), w(1)) {
        ("status", "") => {
            let mut d = signed_in();
            let (signed_in, view) = match given_key() {
                Some(_) => ("with a key that only reads (SUPERCI_KEY)".to_string(), Some(look(&mut d)?.0)),
                None => { let v = d.current()?; if let Some(v) = &v { named_is(v.plane.plane_id(), v.plane.url(), &v.plane.place())? } (d.signed_in_as().unwrap_or_else(|| "nowhere now (AWS's sign-in has ended; this is read with this machine's key)".into()), v) }
            };
            let mut v = match view { Some(v) => json!({ "signed_in": signed_in, "control_plane": plane_json(&v), "status": v.status }), None => json!({ "signed_in": signed_in, "control_plane": null }) };
            // Which workspace this is, said to a person only when there are several.
            if let Some(name) = IN.with(|w| w.borrow().clone()) {
                v["workspace"] = name.into();
                v["workspaces"] = store::root().map(|r| store::workspaces_in(&r).len()).unwrap_or(0).into();
            }
            Ok(Done { said: status_lines(&v), data: v })
        }
        ("jobs", "list") => jobs(),
        ("jobs", "retrieve") => {
            let id = w(2);
            if id.is_empty() || !id.bytes().all(|b| b.is_ascii_digit()) { return usage("Say which: `superci jobs retrieve ID` (ids are in `superci jobs list`).") }
            let mut d = signed_in();
            let (v, key) = look(&mut d)?;
            let j = v.jobs().into_iter().find(|j| j["job_id"].as_u64().is_some_and(|n| n.to_string() == id)).ok_or("That job is not among the latest this control plane keeps (ids are in `superci jobs list`).")?;
            let words = job_words(&j);
            let mut path = format!("/job/log?id={id}&bytes={}", args.get("bytes").unwrap_or("200000"));
            if j["provider"] == "gitlab" { path += &format!("&gl={}", j["gitlab"].as_str().unwrap_or_default()) }
            let got = crate::cloudflare::plane_get(v.plane.url(), &key, &path)
                .map_err(|e| if e.contains("404") { "Reading a job's log needs control plane 0.11.0 or newer: `superci planes update`.".to_string() } else { e })?;
            let mut said = vec![job_line(&words), words["link"].as_str().unwrap_or_default().to_string()];
            // How its start went: what AWS was asked, and what its machine said of its own part.
            if let Some(choice) = words["choice"].as_str() { said.push(format!("{choice}.")) }
            said.extend(job_start_lines(&j));
            match got["log"].as_str() {
                Some(log) => { said.push(if got["truncated"] == true { format!("The end of its log ({} bytes in all):", got["bytes"]) } else { "Its log:".to_string() }); said.push(log.trim_end().to_string()) }
                None => said.push(format!("No log: {}.", got["error"].as_str().unwrap_or("the control plane gave none").trim_end_matches('.'))),
            }
            Ok(Done { said, data: json!({ "job": words, "log": got["log"], "truncated": got["truncated"], "log_error": got["error"] }) })
        }
        ("runs", "create") => {
            let Some(workflow) = args.get("workflow") else { return usage("Say which workflow: `superci runs create --workflow=.github/workflows/ci.yml` (and --job=NAME when it has several jobs).") };
            let pairs = |flag: &str| args.all(flag).iter().map(|kv| kv.split_once('=').map(|(k, v)| (k.to_string(), v.to_string())).ok_or(format!("--{flag} is NAME=VALUE"))).collect::<std::result::Result<Vec<_>, String>>();
            let (secrets, vars) = match (pairs("secret"), pairs("var")) { (Ok(s), Ok(v)) => (s, v), (Err(e), _) | (_, Err(e)) => return usage(e) };
            // With a key for coding agents (SUPERCI_PLANE, SUPERCI_KEY), no sign-in is needed; else this computer's key
            // with the control plane it is kept for (each control plane is handed a key of its own, made from it). A
            // cloud sign-in is needed only to find a control plane, or to hand it the key again: a run needs neither,
            // so it goes on when AWS has ended its sign-in or another account is signed in.
            let (url, key) = match given_key() {
                Some((url, key)) => (url, key),
                None => { let mut d = signed_in(); let (v, key) = look(&mut d)?; (v.plane.url().to_string(), crate::cloudflare::plane_key(&key, v.plane.url())) }
            };
            Ok(crate::local_run::create(&url, &key, workflow, args.get("job"), args.get("event").unwrap_or("push"), &secrets, &vars, steps)?)
        }
        ("usage", "retrieve") => {
            let period = args.get("period").unwrap_or("day");
            let Some(&(_, _, _)) = superci_core::plane::USAGE_PERIODS.iter().find(|(p, _, _)| *p == period) else { return usage("--period is day, week or month.") };
            let mut d = signed_in();
            let (v, _) = look(&mut d)?;
            let u = v.status.as_ref().map(|s| s["usage"][period].clone()).filter(|u| u.is_object()).ok_or("The control plane does not count usage yet: update it (`superci planes update`).")?;
            let (n, f) = (|k: &str| u[k].as_u64().unwrap_or(0), |k: &str| u[k].as_f64().unwrap_or(0.0));
            let span = match period { "week" => "7 days", "month" => "30 days", _ => "24 hours" };
            let (spent, theirs) = (f("usd"), f("host_usd"));
            let mut said = vec![format!("The last {span}: {} jobs, {} ran{}.", n("jobs"), n("ran"), if n("not_ran") > 0 { format!(", {} did not", n("not_ran")) } else { String::new() }),
                format!("{:.1} machine minutes; {} minutes as GitHub or GitLab bills them (each job rounded up).", f("machine_minutes"), n("billed_minutes")),
                format!("Spent ${spent:.2}; the same jobs on the code host's own runners: ${theirs:.2}{}.", if theirs > spent { format!(" (${:.2} saved, {:.0}% less)", theirs - spent, (1.0 - spent / theirs) * 100.0) } else { String::new() })];
            if let Some(m) = u["wait_median_ms"].as_u64() { said.push(format!("Median wait for a machine: {} s.", (m + 500) / 1000)) }
            Ok(Done { said, data: json!({ "period": period, "usage": u }) })
        }
        ("artifacts", operation @ ("list" | "retrieve")) => {
            let mut d = signed_in();
            let (v, key) = look(&mut d)?;
            crate::local_run::new_enough(v.version.as_deref())?;
            let key = crate::cloudflare::plane_key(&key, v.plane.url());
            let run = args.get("run").unwrap_or_default();
            if run.is_empty() || !run.bytes().all(|b| b.is_ascii_digit()) { return usage("Say which run: --run=ID (ids are in `superci runs list`).") }
            if operation == "retrieve" && w(2).is_empty() { return usage("Say which artifact: `superci artifacts retrieve NAME --run=ID` (names are in `superci artifacts list --run=ID`).") }
            if operation == "list" { Ok(crate::local_run::artifacts(v.plane.url(), &key, run)?) } else { Ok(crate::local_run::artifact(v.plane.url(), &key, run, &w(2), args.get("out"))?) }
        }
        ("runs", "list") => {
            let mut d = signed_in();
            let runs: Vec<Value> = runs(&view(&mut d)?).iter().map(run_words).collect();
            let said = runs.iter().take(40).map(run_line).collect::<Vec<_>>();
            Ok(Done { said: if said.is_empty() { vec!["No runs yet.".into()] } else { said }, data: json!({ "runs": runs }) })
        }
        ("runs", "retrieve") => {
            let id = w(2);
            if id.is_empty() || !id.bytes().all(|b| b.is_ascii_digit()) { return usage("Say which: `superci runs retrieve ID` (ids are in `superci runs list`).") }
            let mut d = signed_in();
            let v = view(&mut d)?;
            let of: Vec<Value> = runs(&v).iter().filter(|r| r["id"].as_u64().is_some_and(|n| n.to_string() == id)).map(run_words).collect();
            if of.is_empty() { return Err("That run is not among the latest this control plane keeps (ids are in `superci runs list`).".into()) }
            let jobs = v.jobs();
            let (mut said, mut data) = (vec![], vec![]);
            for r in of.iter().rev() {
                let its: Vec<Value> = jobs.iter().filter(|j| j["run_id"] == r["id"] && j["attempt"].as_u64().filter(|a| *a > 0) == r["attempt"].as_u64()).map(job_words).collect();
                said.push(run_line(r));
                said.push(r["link"].as_str().unwrap_or_default().to_string());
                said.extend(its.iter().map(|j| format!("  {}", job_line(j))));
                let mut r = r.clone();
                r["job_list"] = its.into();
                data.push(r);
            }
            Ok(Done { said, data: json!({ "runs": data }) })
        }
        ("caches", operation @ ("retrieve" | "list" | "update" | "delete")) => {
            let pick = |d: &Dashboard| -> Result<(String, String)> { Ok(match given_key() { Some(k) => k, None => { let p = in_use(d)?; (p.url().to_string(), d.key().to_string()) } }) };
            if operation == "update" {
                if !args.has("enabled") && !args.has("size-gb") && !args.has("days") { return usage("Say what to change: `superci caches update --size-gb=50` (see `superci help caches`).") }
                let mut d = signed_in();
                to_set(&mut d)?;
                in_use(&d)?;
                if let Some(e) = args.get("enabled") {
                    let on = match e { "true" => true, "false" => false, _ => return usage("--enabled is true or false.") };
                    apply!(d, args, if on { "keep jobs' caches in your AWS account".to_string() } else { "leave jobs to GitHub's own cache".to_string() }, "/routing", &[field("action", "cache_on"), field("on", if on { "on" } else { "off" })]);
                }
                if let Some(gb) = args.get("size-gb") { apply!(d, args, format!("let each repository keep {gb} GB in the cache"), "/routing", &[field("action", "cache_size"), field("size_gb", gb)]); }
                if let Some(days) = args.get("days") { apply!(d, args, format!("let a cache entry go unused for {days} days"), "/routing", &[field("action", "cache_days"), field("days", days)]); }
            }
            if operation == "delete" {
                let Some(repo) = args.get("repo") else { return usage("Say whose: `superci caches delete --repo=OWNER/NAME [KEY] --confirm`.") };
                let key = w(2);
                let would = if key.is_empty() { format!("take every cache entry of {repo} out (jobs then save them anew)") } else { format!("take the cache entry {key} of {repo} out") };
                confirmed(args, &would)?;
                let mut fields = vec![field("repo", repo)];
                if !key.is_empty() { fields.push(field("key", key)) }
                if let Some(scope) = args.get("scope") { fields.push(field("scope", scope)) }
                if let Some(done) = dry(args, &would, "/caches/delete", &fields) { return Ok(done) }
                // Asked of the control plane with this computer's key (a key that only reads may not): no cloud
                // sign-in is needed for it.
                let mut d = signed_in();
                if d.signed_in_as().is_none() && given_key().is_some() { return Err(ONLY_READS.into()) }
                let (v, kept) = look(&mut d)?;
                let body: serde_json::Map<String, Value> = fields.iter().map(|(k, v)| (k.to_string(), Value::String(v.clone()))).collect();
                crate::cloudflare::plane_post(v.plane.url(), &crate::cloudflare::plane_key(&kept, v.plane.url()), "/caches/delete", &Value::Object(body))?;
                return Ok(Done::said(if key.is_empty() { format!("{repo}'s cache entries are out.") } else { format!("{key} is out of {repo}'s cache.") }))
            }
            let d = signed_in();
            let (url, key) = pick(&d)?;
            let repo = args.get("repo").filter(|_| operation == "list");
            let got = crate::cloudflare::plane_get(&url, &key, &match repo { Some(r) => format!("/caches?repo={}", url::form_urlencoded::byte_serialize(r.as_bytes()).collect::<String>()), None => "/caches".into() })
                .map_err(|e| if e.contains(" 404") { "This control plane keeps no cache yet: update it (`superci planes update`).".to_string() } else { e })?;
            let now = got["now_ms"].as_u64().unwrap_or(0);
            let ago = |ms: u64| { let m = now.saturating_sub(ms) / 60_000; match m { 0 => "just now".to_string(), 1..=59 => format!("{m} min ago"), 60..=2879 => format!("{} h ago", m / 60), _ => format!("{} days ago", m / 1440) } };
            let size = |b: u64| if b >= 1_000_000_000 { format!("{:.1} GB", b as f64 / 1e9) } else { format!("{} MB", b.div_ceil(1_000_000)) };
            let mut said = vec![];
            if repo.is_none() {
                said.push(if got["on"] == true { format!("The cache is on: each repository keeps {} GB at most, and an entry goes after {} days unused ({} at most since it was saved).", got["size_gb"], got["days"], got["max_age_days"]) } else { "The cache is off: jobs use GitHub's own cache (`superci caches update --enabled=true`).".into() });
                let repos = got["repos"].as_array().cloned().unwrap_or_default();
                if repos.is_empty() { said.push("Nothing kept yet.".into()) }
                for r in &repos { said.push(format!("{:<40} {:>5} entries {:>9}   used {}", r["name"].as_str().or(r["id"].as_str()).unwrap_or_default(), r["entries"], size(r["bytes"].as_u64().unwrap_or(0)), ago(r["used_ms"].as_u64().unwrap_or(0)))) }
            } else {
                let entries = got["entries"].as_array().cloned().unwrap_or_default();
                if got["repo"].is_null() { said.push(format!("{} keeps nothing in the cache.", repo.unwrap_or_default())) }
                for e in &entries { said.push(format!("{:<56} {:<28} {:>9}   used {}", e["key"].as_str().unwrap_or_default(), e["scope"].as_str().unwrap_or_default(), size(e["bytes"].as_u64().unwrap_or(0)), ago(e["used_ms"].as_u64().unwrap_or(0)))) }
            }
            Ok(Done { said, data: got })
        }
        ("keys", "list") => {
            let mut d = signed_in();
            let v = d.current()?.ok_or(NO_PLANE)?;
            let status = v.status.clone().unwrap_or_default();
            let runs_of = |name: &str| status["read_keys"].as_array().into_iter().flatten().find(|k| k["name"] == name).map(|k| k["runs"].clone()).filter(|r| !r.is_null());
            let keys: Vec<Value> = read_keys(&status).into_iter().map(|(name, until)| { let mut k = json!({ "name": name.to_lowercase(), "until": day_of(until / 1000) }); if let Some(r) = runs_of(&name) { k["runs"] = r } k }).collect();
            let said = if keys.is_empty() { vec!["No keys that only read. Make one for a coding agent or a script: `superci keys create agent`.".to_string()] }
                else { keys.iter().map(|k| match k.get("runs") {
                    Some(_) => format!("{:<24} reads and starts runs from a computer until {}", k["name"].as_str().unwrap_or_default(), k["until"].as_str().unwrap_or_default()),
                    None => format!("{:<24} reads until {}", k["name"].as_str().unwrap_or_default(), k["until"].as_str().unwrap_or_default()),
                }).collect() };
            Ok(Done { said, data: json!({ "keys": keys }) })
        }
        ("keys", "create") => {
            if w(2).is_empty() { return usage("Give it a name: `superci keys create agent`.") }
            let Ok(days) = args.get("days").unwrap_or("30").parse::<u64>() else { return usage("--days is a number of days (30 unless given).") };
            // A key that may also start runs from a computer (--runs), within the control plane's own limits.
            if args.has("max-cpu") || args.has("daily-usd") { return usage("A key has no limits of its own: its jobs keep to the control plane's (`superci limits update --max-cpu=64 --daily-usd=50`).") }
            let runs = args.has("runs");
            let mut d = ready_to_set()?;
            let plane = in_use(&d)?;
            let what = if runs { "that reads and starts runs from a computer" } else { "that only reads" };
            if let Some(done) = dry(args, &format!("make a key named {} {what}, good for {days} days", w(2)), "keys", &[]) { return Ok(done) }
            let (key, until) = d.create_key(w(2), days, runs)?;
            if runs {
                return Ok(Done { said: vec![format!("A key for coding agents, until {}: it reads, and starts runs from a computer, within this control plane's limits (`superci limits retrieve`). It is shown this once:", day_of(until)), String::new(),
                    format!("  SUPERCI_PLANE={} SUPERCI_KEY={key}", plane.url()), String::new(), "With these two set, `superci runs create --workflow=…` works with no sign-in, and nothing else can be changed.".to_string()],
                    data: json!({ "ok": true, "name": w(2).to_lowercase(), "until": day_of(until), "runs": true, "env": { "SUPERCI_PLANE": plane.url(), "SUPERCI_KEY": key } }) })
            }
            Ok(Done { said: vec![format!("A key that only reads, until {}. It is shown this once:", day_of(until)), String::new(), format!("  SUPERCI_PLANE={} SUPERCI_KEY={key}", plane.url()), String::new(),
                "With these two set, whatever looks works with no sign-in (`superci status`, `superci jobs list`, `superci runners list`…), and nothing can be changed.".to_string()],
                data: json!({ "ok": true, "name": w(2).to_lowercase(), "until": day_of(until), "env": { "SUPERCI_PLANE": plane.url(), "SUPERCI_KEY": key } }) })
        }
        ("keys", "delete") => {
            if w(2).is_empty() { return usage("Say which: `superci keys delete NAME` (names are in `superci keys list`).") }
            let mut d = ready_to_set()?;
            in_use(&d)?;
            if let Some(done) = dry(args, &format!("end the key named {}", w(2)), "keys", &[]) { return Ok(done) }
            d.revoke_key(w(2))?;
            Ok(Done::said(format!("The key {} no longer reads.", w(2).to_lowercase())))
        }
        // In a debug build only, to see (and record, with SUPERCI_RECORD) what a real account answers:
        // `superci debug ec2 REGION ACTION Key=Value…`, `superci debug iam ACTION Key=Value…`, or
        // `superci debug json REGION SERVICE TARGET '{…}'`. A SERVICE
        // with a dot in it is the whole host (budgets.amazonaws.com), a TARGET that starts with a slash is a path
        // (/listRegions), and one that ends in @1.0 is asked in that JSON version.
        // (What a stopped deploy made, removed as "Choose another place" removes it: `superci debug abandon REGION PLANE`.)
        #[cfg(debug_assertions)]
        ("debug", "abandon") => {
            let mut d = signed_in();
            let (_, creds) = d.aws_account(args.get("account").unwrap_or_default())?;
            let left = crate::aws_plane::abandon(&creds, w(2), w(3));
            Ok(Done::said(if left.is_empty() { "nothing left".to_string() } else { format!("left: {}", left.join("; ")) }))
        }
        // (And the AWS account's own budget, each step by itself: `superci debug budget found|set USD EMAIL [stop]|lift|remove`.)
        #[cfg(debug_assertions)]
        ("debug", "budget") => {
            let mut d = signed_in();
            let plane_id = view(&mut d)?.plane.plane_id().to_string();
            let (account, creds) = d.aws_account(args.get("account").unwrap_or_default())?;
            let http = crate::aws::Blocking::new();
            let b = crate::aws_budget::Budgets { http: &http, creds: &creds, account: &account, plane_id: &plane_id, pause: &|ms| std::thread::sleep(std::time::Duration::from_millis(ms)) };
            let said = match w(2) {
                "set" => b.set(w(3).parse().map_err(|_| "set USD EMAIL [stop]")?, Some(w(4)).filter(|e| !e.is_empty()), w(5) == "stop").map(|_| "set".to_string()),
                "lift" => b.lift(w(3) == "again").map(|_| "lifted".to_string()),
                "remove" => b.remove().map(|_| "removed".to_string()),
                _ => b.found().map(|f| format!("{f:?}")),
            };
            let said = match said { Ok(s) => s, Err(e) => format!("refused or failed: {e}") };
            Ok(Done { data: json!({ "answer": said }), said: vec![said] })
        }
        // (A signed call to an AWS service that speaks REST, S3 among them: `superci debug rest REGION SERVICE METHOD URL
        // [FILE]`, FILE being the body.)
        #[cfg(debug_assertions)]
        ("debug", "rest") => {
            let mut d = signed_in();
            let (_, creds) = d.aws_account(args.get("account").unwrap_or_default())?;
            let body = if w(6).is_empty() { vec![] } else { std::fs::read(w(6)).map_err(|e| format!("{}: {e}", w(6)))? };
            let now = std::time::SystemTime::now().duration_since(std::time::UNIX_EPOCH).map(|t| t.as_millis() as u64).unwrap_or(0);
            let headers = vec![("x-amz-content-sha256".to_string(), superci_core::crypto::sha256_hex(&body))];
            let signed = superci_core::aws::sigv4(w(4), w(5), &headers, &body, &creds, w(2), w(3), &superci_core::aws::amz_date(now))?;
            let mut r = superci_core::io::Request::new(w(4), w(5)).with_body(body);
            r.headers = signed;
            let res = futures::executor::block_on(superci_core::io::Http::send(&crate::aws::Blocking::new(), r))?;
            let said = format!("{} {}", res.status, res.body_text());
            Ok(Done { data: json!({ "answer": said }), said: vec![said] })
        }
        // (One call to Cloudflare's API with this workspace's sign-in: `superci debug cloudflare METHOD PATH [FILE]`.)
        #[cfg(debug_assertions)]
        ("debug", "cloudflare") => {
            let mut d = signed_in();
            let cf = d.cf.as_mut().ok_or("Sign in with Cloudflare first.")?.client()?;
            let body = if w(4).is_empty() { None } else { Some(std::fs::read(w(4)).map_err(|e| format!("{}: {e}", w(4)))?) };
            let got = cf.debug_call(w(2), w(3), body)?;
            Ok(Done { said: vec![got.to_string()], data: got })
        }
        // (GitHub's runner taking one job from SuperCI's own service, run here: `superci debug runner-service FILE JOB
        // ROOT PORT JITFILE [--secret=N=V] [--var=N=V]`, ROOT being where the runner's calls go, e.g. http://localhost:8080/runner/rig.)
        #[cfg(debug_assertions)]
        ("debug", "runner-service") => {
            let pairs = |flag: &str| args.all(flag).iter().filter_map(|kv| kv.split_once('=')).map(|(k, v)| (k.to_string(), v.to_string())).collect::<Vec<_>>();
            let said = crate::runner_local::serve(w(2), w(3), w(5).parse().unwrap_or(8099), w(4), &pairs("secret"), &pairs("var"), w(6))?;
            Ok(Done { data: json!({ "answer": said }), said: vec![said] })
        }
        #[cfg(debug_assertions)]
        ("debug", kind @ ("ec2" | "json" | "iam")) => {
            let mut d = signed_in();
            let (_, creds) = d.aws_account(args.get("account").unwrap_or_default())?;
            let now = std::time::SystemTime::now().duration_since(std::time::UNIX_EPOCH).map(|t| t.as_millis() as u64).unwrap_or(0);
            let http = crate::aws::Blocking::new();
            let answer = if kind == "iam" {
                let params: serde_json::Map<String, Value> = args.words[3.min(args.words.len())..].iter().filter_map(|kv| kv.split_once('=')).map(|(k, v)| (k.to_string(), Value::from(v))).collect();
                futures::executor::block_on(superci_core::aws::iam(&http, &creds, w(2), Value::Object(params), now))
            } else if kind == "ec2" {
                let params: serde_json::Map<String, Value> = args.words[4.min(args.words.len())..].iter().filter_map(|kv| kv.split_once('=')).map(|(k, v)| (k.to_string(), Value::from(v))).collect();
                futures::executor::block_on(superci_core::aws::ec2(&http, w(2), &creds, w(3), Value::Object(params), now))
            } else {
                let body: Value = serde_json::from_str(w(5)).map_err(|e| e.to_string())?;
                let service = w(3).split('.').next().unwrap_or_default().to_string();
                let host = if w(3).contains('.') { w(3).to_string() } else { format!("{}.{}.amazonaws.com", w(3), w(2)) };
                let (target, kind) = match w(4).strip_suffix("@1.0") { Some(t) => (t, "application/x-amz-json-1.0"), None => (w(4), "application/x-amz-json-1.1") };
                let (path, target) = if target.starts_with('/') { (target, None) } else { ("/", Some(target)) };
                futures::executor::block_on(superci_core::aws::json_call(&http, "POST", &format!("https://{host}{path}"), w(2), &service, target, if target.is_some() { kind } else { "application/json" }, Some(&body), &creds, now)).map(|v| v.to_string())
            };
            let said = match answer { Ok(a) => a, Err(e) => format!("refused or failed: {e}") };
            Ok(Done { data: json!({ "answer": said }), said: vec![said] })
        }
        ("accounts", "list") => {
            let d = signed_in();
            let mut accounts: Vec<Value> = d.aws_accounts_signed_in().into_iter().map(|(id, who)| json!({ "cloud": "aws", "id": id, "signed_in_as": who })).collect();
            accounts.extend(d.other_accounts_signed_in().into_iter().map(|(cloud, id)| json!({ "cloud": cloud, "id": id })));
            let said = if accounts.is_empty() { vec![NOT_SIGNED_IN.to_string()] } else { accounts.iter().map(|a| format!("{:<11} {}{}", a["cloud"].as_str().unwrap_or_default(), a["id"].as_str().unwrap_or_default(), a["signed_in_as"].as_str().map(|w| format!("  {w}")).unwrap_or_default()).trim_end().to_string()).collect() };
            Ok(Done { said, data: json!({ "accounts": accounts }) })
        }
        // An account's limit for a month, its providers together (AWS: spot and on-demand machines).
        ("accounts", "update") => {
            if w(2) != "aws" { return usage("Say which cloud's: `superci accounts update aws --monthly-usd=200`. Another provider's limit is its own: `superci runners update CLOUD --monthly-usd=N`.") }
            if !["monthly-usd", "daily-usd", "aws-budget"].iter().any(|f| args.has(f)) { return usage("Say what to change: `superci accounts update aws --monthly-usd=200` (see `superci help accounts`).") }
            let budget = args.get("aws-budget");
            if budget.is_some_and(|b| !["none", "emails", "stops", "lift"].contains(&b)) { return usage("--aws-budget is none, emails, stops or lift (see `superci help accounts`).") }
            let mut d = signed_in();
            to_set(&mut d)?;
            in_use(&d)?;
            let now = view(&mut d)?.routing();
            let (month, day) = (given_dollars(args, "monthly-usd", now.account_usd.get("aws").copied())?, given_dollars(args, "daily-usd", now.account_daily_usd.get("aws").copied())?);
            let mut fields = vec![field("action", "account_usd"), field("account", "aws"), field("usd", month.clone()), field("daily", day.clone())];
            if let Some(b) = budget { fields.push(field("budget", b)) }
            if let Some(email) = args.get("email") { fields.push(field("email", email)) }
            let in_aws = match budget { Some("none") => "; no budget in AWS itself", Some("emails") => "; AWS emails at 80% and 100% of it", Some("stops") => "; AWS emails, and stops new machines at 100% of it", Some("lift") => "; AWS's rule taken off the control plane's role", _ => "" };
            apply!(d, args, format!("let the AWS account spend on machines {} a month and {} a day (spot and on-demand together){in_aws}", or_no_limit(&month), or_no_limit(&day)), "/routing", &fields);
            let v = view(&mut d)?;
            let routing = v.routing();
            let (spent, cap, today, day_cap) = (v.spend_account("aws"), routing.account_usd.get("aws").copied(), v.spend_today_account("aws"), routing.account_daily_usd.get("aws").copied());
            let said_budget = match &routing.aws_budget { None => "No budget in AWS itself.", Some(b) if b.stop => "In AWS itself: emails at 80% and 100% of the month's limit, and no new machines at 100%.", Some(_) => "In AWS itself: emails at 80% and 100% of the month's limit." };
            Ok(Done { said: vec![month_line("The AWS account", spent, cap), day_line(today, day_cap), said_budget.to_string()],
                data: json!({ "ok": true, "cloud": "aws", "monthly_usd": cap, "spent_usd": spent, "daily_usd": day_cap, "spent_today_usd": today, "aws_budget": routing.aws_budget.as_ref().map(|b| if b.stop { "stops" } else { "emails" }) }) })
        }
        ("accounts", "retrieve") => {
            if w(2) != "aws" { return usage("Say which cloud's: `superci accounts retrieve aws` (the look is at AWS accounts; other clouds have nothing to look for yet).") }
            let mut d = signed_in();
            let (account, who, look) = d.look_at_aws(args.get("account").unwrap_or_default())?;
            Ok(Done { said: aws_look_lines(&account, &who, &look), data: json!({ "cloud": "aws", "id": account, "signed_in_as": who, "kind": look.kind(), "allowed_regions": look.allowed_regions(), "organization": look.organization().map(|r| json!({ "management_account": r.management_account(), "policy": r.policy_id() })), "allows": look }) })
        }
        ("images", "list") => {
            let mut d = signed_in();
            let (account, _, look) = d.look_at_aws(args.get("account").unwrap_or_default())?;
            let (_, creds) = d.aws_account(&account)?;
            let mut rows = vec![];
            for (region, there) in &look.images {
                // (A copy that a newer one replaced goes, now that the newer one is there.)
                let tidied = crate::aws::tidy_copies(&creds, region).unwrap_or(0);
                let mut copies = crate::aws::copied_images(&creds, region).unwrap_or_default();
                copies.sort_by(|a, b| crate::aws::build_of(&b.name).cmp(crate::aws::build_of(&a.name)));
                // Its maker builds the image anew every week or two; a copy stays the build it was made of.
                let behind = if copies.is_empty() { None } else { crate::aws::newest_build().and_then(|newest| crate::aws::behind(&copies, &newest).map(|have| (have.to_string(), newest))) };
                let state = match (copies.first(), there) {
                    (Some(c), _) if c.state == "available" => format!("your copy {} ({}){}{}", c.id, c.name,
                        match &behind { Some((have, newest)) => format!(": the build of {}; one of {} is out, `superci images update {region}` copies it in", crate::aws::build_day(have), crate::aws::build_day(newest)), None => String::new() },
                        if tidied > 0 { format!(" (the copy before it is removed)") } else { String::new() }),
                    (Some(c), _) => format!("your copy {} is being made ({})", c.id, c.state),
                    (None, Some(true)) => "published".to_string(),
                    (None, Some(false)) => format!("none: `superci images create {region}` copies it in"),
                    (None, None) => "not known".to_string(),
                };
                rows.push(json!({ "region": region, "published": copies.is_empty() && *there == Some(true), "copies": copies, "newer_build": behind.as_ref().map(|(_, newest)| newest), "said": state }));
            }
            let said = if rows.is_empty() { vec!["This account can use none of the regions SuperCI works in.".to_string()] } else { rows.iter().map(|r| format!("{:<15} {}", r["region"].as_str().unwrap_or_default(), r["said"].as_str().unwrap_or_default())).collect() };
            Ok(Done { said, data: json!({ "account": account, "images": rows }) })
        }
        ("images", "create") => {
            let region = w(2);
            if !superci_core::page::REGIONS.contains(&region) { return usage("Say where: `superci images create REGION` (a region the image jobs run on is not in: `superci images list`).") }
            let from = match args.get("from").map(|f| f.split_once(':')) { None => None, Some(Some((r, i))) if superci_core::aws::aws_id(i, "ami-") => Some((r, i)), Some(_) => return usage("--from is a region and an image: --from=eu-west-1:ami-0123456789abcdef0.") };
            let mut d = signed_in();
            let (_, creds) = d.aws_account(args.get("account").unwrap_or_default())?;
            // One copy is enough: a second would only be paid for.
            if let Some(copy) = crate::aws::copied_images(&creds, region)?.first() { return Err(format!("{region} has your copy of the image already: {} ({}). `superci images delete {region} --confirm` removes it.", copy.id, copy.state).into()) }
            // Where it would come from is read first (the maker's public list): a dry run says it too.
            let source = crate::aws::copy_source_for(region, from)?;
            let (from_region, from_image) = (source.1.clone(), source.2.clone());
            if let Some(done) = dry(args, &format!("copy the image jobs run on into {region}, from {from_region} ({from_image})"), "images", &[]) { return Ok(done) }
            let id = crate::aws::copy_image_into(&creds, region, &source)?;
            Ok(Done { said: vec![format!("Copying the image jobs run on into {region}, from {from_region} ({from_image}): {id}."), "AWS takes about ten minutes; `superci images list` shows when it is there.".to_string(),
                format!("It is kept in your account's storage there (about $1.50 a month). `superci images delete {region} --confirm` removes it.")], data: json!({ "ok": true, "region": region, "image": id, "from": { "region": from_region, "image": from_image } }) })
        }
        // A newer build of the image, copied in where the account holds a copy of an older one.
        ("images", "update") => {
            let region = w(2);
            if !superci_core::page::REGIONS.contains(&region) { return usage("Say where: `superci images update REGION` (a region your copy of the image is in: `superci images list`).") }
            let mut d = signed_in();
            let (_, creds) = d.aws_account(args.get("account").unwrap_or_default())?;
            let copies = crate::aws::copied_images(&creds, region)?;
            if copies.is_empty() { return Err(format!("{region} has no copy of yours. `superci images create {region}` copies the image in, where it is not published.").into()) }
            if let Some(coming) = copies.iter().find(|c| c.state == "pending") { return Err(format!("A copy is on its way into {region} already: {} ({}).", coming.id, coming.name).into()) }
            let newest = crate::aws::newest_build().ok_or("The list of runner images could not be read from GitHub.")?;
            let Some(have) = crate::aws::behind(&copies, &newest).map(str::to_string) else { return Ok(Done { said: vec![format!("Your copy in {region} is of the newest build ({}).", crate::aws::build_day(&newest))], data: json!({ "ok": true, "region": region, "newest": true }) }) };
            let source = crate::aws::copy_source_for(region, None)?;
            let (from_region, from_image) = (source.1.clone(), source.2.clone());
            if let Some(done) = dry(args, &format!("copy the build of {} into {region}, from {from_region} ({from_image}), in place of your copy of {}", crate::aws::build_day(&newest), crate::aws::build_day(&have)), "images", &[]) { return Ok(done) }
            let id = crate::aws::copy_image_into(&creds, region, &source)?;
            Ok(Done { said: vec![format!("Copying the build of {} into {region}, from {from_region} ({from_image}): {id}.", crate::aws::build_day(&newest)),
                "AWS takes about ten minutes. Jobs start from your older copy until it is there; then from the new one.".to_string(),
                "The older copy is removed once the new one is there: at the next `superci images list`, or by the dashboard.".to_string()], data: json!({ "ok": true, "region": region, "image": id, "from": { "region": from_region, "image": from_image } }) })
        }
        ("images", "delete") => {
            let region = w(2);
            if !superci_core::page::REGIONS.contains(&region) { return usage("Say where: `superci images delete REGION --confirm`.") }
            let would = format!("remove your copy of the image jobs run on from {region}: no job can start there after");
            confirmed(args, &would)?;
            let mut d = signed_in();
            let (_, creds) = d.aws_account(args.get("account").unwrap_or_default())?;
            if let Some(done) = dry(args, &would, "images", &[]) { return Ok(done) }
            let removed = crate::aws::delete_copied_images(&creds, region)?;
            Ok(Done::said(if removed == 0 { format!("There was no copy of yours in {region}.") } else { format!("Removed your copy of the image from {region}, with its storage.") }))
        }
        ("runners", "list") => runners_of(&mut signed_in()),
        ("connections", "list") => connections(),
        ("deliveries", operation @ ("list" | "retrieve")) => {
            let id = w(2);
            if operation == "retrieve" && (id.is_empty() || !id.bytes().all(|b| b.is_ascii_digit())) { return usage("Say which: `superci deliveries retrieve ID` (ids are in `superci deliveries list`).") }
            let mut d = signed_in();
            let (v, key) = look(&mut d)?;
            let got = crate::cloudflare::plane_get(v.plane.url(), &key, &if operation == "retrieve" { format!("/github/deliveries?id={id}") } else { "/github/deliveries".to_string() })
                .map_err(|e| if e.contains("404") { "This needs control plane 0.11.2 or newer: `superci planes update`.".to_string() } else { e })?;
            let s = |x: &Value| x.as_str().unwrap_or_default().to_string();
            let mut said = vec![];
            for app in got.as_array().into_iter().flatten() {
                let list = &app["deliveries"];
                if let Some(e) = list["error"].as_str() { said.push(format!("{}: GitHub would not say ({e})", s(&app["app"]))); continue }
                if operation == "retrieve" {
                    said.push(format!("{} {} {} · answered {} {} · job {} {} {}", s(&list["delivered_at"]), s(&list["event"]), s(&list["action"]), list["status_code"], s(&list["status"]), list["job"], s(&list["job_name"]), list["labels"]));
                    said.push(format!("sent to {}", s(&list["url"])));
                    if let Some(a) = list["answer"].as_str().filter(|a| !a.is_empty()) { said.push(format!("answer: {a}")) }
                } else {
                    for x in list.as_array().into_iter().flatten() {
                        said.push(format!("{}  {:<13} {:<12} {} {}{}  {}", s(&x["delivered_at"]).replace('T', " ").chars().take(19).collect::<String>(), s(&x["event"]), s(&x["action"]), x["status_code"], s(&x["status"]).chars().take(60).collect::<String>(), if x["redelivery"] == true { "  (sent again)" } else { "" }, x["id"]));
                    }
                }
            }
            if said.is_empty() { said.push("GitHub is not connected, or it has sent nothing lately.".into()) }
            Ok(Done { said, data: got })
        }
        ("planes", "list") => planes(),
        ("logout", "") => { let said = signed_in().logout()?; Ok(Done { data: json!({ "ok": true, "done": said }), said }) }

        ("planes", "create") => {
            let cloud = w(2);
            if !CLOUDS.contains(&cloud) { return usage("Say where: `superci planes create aws --region=us-east-1`, `superci planes create cloudflare` or `superci planes create modal`.") }
            let region = match (cloud, args.get("region")) { ("aws", None) => return usage("Say where: --region=us-east-1 (any AWS region the dashboard's Control plane page lists)."), (_, r) => r.unwrap_or_default().to_string() };
            let mut d = ready()?;
            let (fields, place) = match cloud {
                "aws" => (std::iter::once(field("region", region.clone())).chain(args.get("account").map(|a| field("account", a))).collect(), format!("AWS, in {region}")),
                "cloudflare" => {
                    let accounts = d.cloudflare_accounts();
                    let account = match (args.get("account"), accounts) {
                        (Some(a), _) => a.to_string(),
                        (None, [(only, _)]) => only.clone(),
                        (None, []) => return Err("Sign in with Cloudflare first.".into()),
                        (None, several) => return usage(format!("Say which account: --account=ID. Yours: {}.", several.iter().map(|(id, name)| format!("{id} ({name})")).collect::<Vec<_>>().join(", "))),
                    };
                    (vec![field("account", account.clone())], format!("Cloudflare, in account {account}"))
                }
                _ => (vec![], "Modal".to_string()),
            };
            apply!(d, args, format!("deploy a control plane to {place}"), &format!("/plane/{cloud}"), &fields);
            Ok(Done::said(d.wait(Background::Deploy, steps)?))
        }
        ("planes", "update") => {
            let mut d = ready()?;
            let plane = in_use(&d)?;
            apply!(d, args, format!("update the control plane {} to {DASHBOARD_VERSION}", if w(2).is_empty() { format!("in use ({})", plane.place()) } else { w(2).to_string() }), "/plane/update", &[field("plane", w(2))]);
            Ok(Done::said(d.wait(Background::Update, steps)?))
        }
        ("planes", "move") => {
            if w(2).is_empty() { return usage("Say where to: `superci planes move ID` (ids are in `superci planes list`).") }
            let mut d = ready()?;
            apply!(d, args, format!("move to the control plane {}: settings, history and runner providers go along, then GitHub and GitLab are switched over", w(2)), "/plane/move", &[field("plane", w(2))]);
            Ok(Done::said(d.wait(Background::Move, steps)?))
        }
        ("planes", "allow") => {
            let mut d = ready()?;
            let plane = if w(2).is_empty() { in_use(&d)?.plane_id().to_string() } else { w(2).to_string() };
            apply!(d, args, format!("give the AWS role of the control plane {plane} what this version asks for"), "/permissions/aws", &[field("plane", plane.clone())]);
            Ok(Done::said("Its AWS role has what this version asks for."))
        }
        ("planes", "delete") => {
            if w(2).is_empty() { return usage("Say which: `superci planes delete ID --confirm` (ids are in `superci planes list`).") }
            let would = format!("delete the control plane {} and what was made for it in its cloud", w(2));
            confirmed(args, &would)?;
            let mut d = ready()?;
            Ok(Done::said(apply!(d, args, would, "/plane/delete", &[field("plane", w(2))])))
        }
        ("leave", "") => {
            // `--plane=ID` says which one is stopped (the others go on). What deletes takes its control plane from
            // the command itself, never from SUPERCI_PLANE: without the flag it is the only live one, or it stops.
            let named = args.get("plane").map(str::trim).filter(|p| !p.is_empty()).map(str::to_string);
            if named.is_none() { NAMED.with(|n| n.borrow_mut().take()); crate::view::name(None) }
            let would = match &named {
                Some(id) => format!("stop the control plane {id}: GitHub and GitLab stop sending it jobs, and it is deleted with what was made for it"),
                None => "stop SuperCI: GitHub and GitLab stop sending jobs, and the control plane is deleted with what was made for it, with the ones that serve nothing".to_string(),
            };
            confirmed(args, &would)?;
            let mut d = ready()?;
            in_use(&d)?;
            let mut fields = vec![field("confirm", "superci")];
            if let Some(id) = &named { fields.push(field("plane", id)) }
            Ok(Done::said(apply!(d, args, would, "/plane/leave", &fields)))
        }

        ("runners", "create") => {
            let cloud = w(2);
            if !CLOUDS.contains(&cloud) { return usage("Say which: `superci runners create aws`, `cloudflare` or `modal`.") }
            let mut d = ready()?;
            let plane = in_use(&d)?;
            // As the Add runners page does: a control plane starts machines in its own cloud itself; elsewhere it is
            // connected (AWS: a role it may assume; Cloudflare, Modal: a small agent there).
            let (path, fields) = match (cloud, &plane) {
                ("aws", Plane::Aws { .. }) => ("/runners/aws-own", vec![]),
                ("aws", _) => match args.get("region") { Some(r) => ("/aws/connect", vec![field("region", r)]), None => return usage("Say where its machines start: `superci runners create aws --region=us-east-1`.") },
                ("modal", Plane::Modal { .. }) => ("/runners/modal-own", vec![]),
                ("modal", _) => ("/runners/modal", vec![]),
                _ => ("/runners/cloudflare", args.get("account").map(|a| vec![field("account", a)]).unwrap_or_default()),
            };
            let said = apply!(d, args, format!("let {cloud} run jobs for the control plane in use ({})", plane.place()), path, &fields);
            Ok(Done::said(if said.is_empty() { format!("{cloud} runs jobs now.") } else { said }))
        }
        ("runners", "delete") => {
            let cloud = w(2);
            if !CLOUDS.contains(&cloud) { return usage("Say which: `superci runners delete aws --confirm` (or cloudflare, modal).") }
            let would = format!("remove {cloud} as a runner provider{}", if args.has("only-here") { ", leaving what SuperCI made for it there" } else { " and delete what SuperCI made for it there" });
            confirmed(args, &would)?;
            let mut d = ready()?;
            let plane = in_use(&d)?;
            let mut fields = vec![field("plane", plane.plane_id()), field("cloud", cloud)];
            if args.has("only-here") { fields.push(field("only", "on")) }
            if args.has("stop-jobs") { fields.push(field("stop", "on")) }
            Ok(Done::said(apply!(d, args, would, "/runners/remove", &fields)))
        }
        ("runners", "order") => {
            if args.words.len() < 3 { return usage("Say the order: `superci runners order aws aws-on-demand cloudflare`.") }
            let mut d = signed_in();
            let now = view(&mut d)?.order();
            // The places named, first; any other connected one after them, as it was.
            let mut order: Vec<String> = args.words[2..].to_vec();
            if let Some(unknown) = order.iter().find(|c| !now.iter().any(|p| p.cloud == **c)) { return usage(format!("{unknown} is not one of your runner providers ({}).", now.iter().map(|p| p.cloud.clone()).collect::<Vec<_>>().join(", "))) }
            for p in now { if !order.contains(&p.cloud) { order.push(p.cloud) } }
            let names: Vec<String> = (0..order.len()).map(|i| format!("cloud_{i}")).collect();
            let mut fields: Vec<(&str, String)> = vec![field("action", "order")];
            for (name, cloud) in names.iter().zip(&order) { fields.push((name, cloud.clone())) }
            to_set(&mut d)?;
            apply!(d, args, format!("set the order to {}", order.join(", ")), "/routing", &fields);
            Ok(Done { said: vec![format!("Order: {}.", order.join(", "))], data: json!({ "ok": true, "order": order }) })
        }
        ("runners", "update") => {
            let cloud = w(2);
            let mut d = signed_in();
            let order = view(&mut d)?.order();
            let Some(pool) = order.iter().find(|p| p.cloud == cloud) else { return usage(format!("Say which: `superci runners update CLOUD …`, one of {}.", order.iter().map(|p| p.cloud.clone()).collect::<Vec<_>>().join(", "))) };
            // The form's fields as they stand, with what was given in their place (the page sends them all).
            let limit = |flag: &str, now: Option<String>| match args.get(flag) { Some("none") => String::new(), Some(v) => v.to_string(), None => now.unwrap_or_default() };
            let regions: Vec<String> = args.get("regions").map(|r| r.split(',').map(|r| r.trim().to_string()).filter(|r| !r.is_empty()).collect()).unwrap_or_default();
            let names: Vec<String> = (0..regions.len()).map(|i| format!("region_{i}")).collect();
            let mut fields: Vec<(&str, String)> = vec![field("action", "pool"), field("cloud", cloud), field("current", order.iter().map(|p| p.cloud.clone()).collect::<Vec<_>>().join(",")),
                field("max", limit("max-jobs", pool.max_jobs.map(|n| n.to_string()))), field("usd", limit("monthly-usd", pool.monthly_usd.map(|n| n.to_string())))];
            if truth(args, "enabled")?.unwrap_or(!pool.off) { fields.push(field("on", "on")) }
            for (name, region) in names.iter().zip(&regions) { fields.push((name, region.clone())) }
            if args.has("networks") { fields.push(field("networks", args.all("networks").into_iter().filter(|n| *n != "none").collect::<Vec<_>>().join("\n"))) }
            if let Some(location) = args.get("location") { fields.push(field("location", location)) }
            if let Some(image) = args.get("image") { fields.push(field("image", if image == "none" { "" } else { image })) }
            let given: Vec<String> = ["max-jobs", "monthly-usd", "enabled", "regions", "networks", "location", "image"].iter().filter(|f| args.has(f)).map(|f| format!("--{f}={}", args.get(f).unwrap_or_default())).collect();
            if given.is_empty() { return usage(format!("Say what to change: `superci runners update {cloud} --max-jobs=20` (see `superci help runners`).")) }
            to_set(&mut d)?;
            apply!(d, args, format!("update {cloud}: {}", given.join(" ")), "/routing", &fields);
            runners_of(&mut d)
        }
        ("labels", "list") => {
            let labels = view(&mut signed_in())?.labels();
            Ok(Done { said: labels.iter().enumerate().map(|(i, l)| if i == 0 && labels.len() > 1 { format!("{l}  (shown in examples)") } else { l.clone() }).collect(), data: json!({ "labels": labels }) })
        }
        ("labels", operation @ ("create" | "delete")) => {
            if w(2).is_empty() { return usage(format!("Say which: `superci labels {operation} NAME`.")) }
            let would = if operation == "create" { format!("add {} to the labels workflows may name; the ones before keep working", w(2)) } else { format!("stop answering to the label {}: jobs that still name it would wait for a runner that never comes", w(2)) };
            if operation == "delete" { confirmed(args, &would)? }
            let mut d = ready_to_set()?;
            in_use(&d)?;
            apply!(d, args, would, "/labels", &[field("action", if operation == "create" { "add" } else { "remove" }), field("label", w(2))]);
            let labels = view(&mut d)?.labels();
            Ok(Done { said: vec![format!("It answers to: {}.", labels.join(", ")), format!("In a workflow: `runs-on: {}`.", labels.first().cloned().unwrap_or_default())], data: json!({ "ok": true, "labels": labels }) })
        }
        ("name", "retrieve") => {
            let name = view(&mut signed_in())?.name();
            Ok(Done { said: vec![name.clone()], data: json!({ "name": name }) })
        }
        ("name", "update") => {
            if w(2).is_empty() { return usage("Say what to call it: `superci name update AcmeCI`.") }
            let mut d = ready_to_set()?;
            in_use(&d)?;
            apply!(d, args, format!("call it {}", w(2)), "/name", &[field("name", w(2))]);
            let name = view(&mut d)?.name();
            Ok(Done { said: vec![format!("It is called {name}.")], data: json!({ "ok": true, "name": name }) })
        }
        ("machine", operation @ ("retrieve" | "update")) => {
            let mut d = signed_in();
            let now = view(&mut d)?.machine();
            if operation == "update" {
                use superci_core::spec::{Spec, KEYS};
                if !KEYS.iter().any(|key| args.has(key)) { return usage("Say what to change: `superci machine update --cpu=4 --ram=16` (see `superci help machine`).") }
                // Each key a label has, by the same name and the same rules: what is given is set (`default` leaves
                // it to each provider's standard again), the rest stays as it is.
                let mut want = now.pairs();
                for key in KEYS {
                    let Some(value) = args.get(key) else { continue };
                    want.retain(|(k, _)| *k != key);
                    if value != "default" { want.push((key, value.to_string())) }
                }
                let mut machine = Spec::default();
                for (key, value) in &want { if let Err(e) = machine.set(key, value) { return usage(e) } }
                if let Err(e) = machine.check() { return usage(e) }
                to_set(&mut d)?;
                let would = if want.is_empty() { "each provider's standard".to_string() } else { machine.label("").trim_start_matches('/').replace('/', ", ") };
                apply!(d, args, format!("give `runs-on: superci` this machine: {would}"), "/machine", &want);
            }
            let seen = view(&mut d)?;
            let (machine, label) = (seen.machine(), seen.label());
            Ok(Done { said: vec![format!("`runs-on: {label}` gets: {}.", machine_words(&serde_json::to_value(&machine).unwrap_or_default()))], data: json!({ "ok": true, "machine": machine }) })
        }
        ("limits", operation @ ("retrieve" | "update")) => {
            let mut d = signed_in();
            if operation == "update" {
                if !args.has("max-cpu") && !args.has("max-hours") && !args.has("monthly-usd") && !args.has("daily-usd") { return usage("Say what to change: `superci limits update --monthly-usd=200` (see `superci help limits`).") }
                to_set(&mut d)?;
                in_use(&d)?;
                if let Some(max) = args.get("max-cpu") { apply!(d, args, format!("let a label ask for up to {max} CPUs"), "/routing", &[field("action", "max_cpu"), field("max_cpu", max)]); }
                if let Some(hours) = args.get("max-hours") { apply!(d, args, format!("let a job run for up to {hours} hours"), "/routing", &[field("action", "max_hours"), field("max_hours", hours)]); }
                if args.has("monthly-usd") || args.has("daily-usd") {
                    // Both as they stand, with what was given in its place (the page sends them both).
                    let now = view(&mut d)?.routing();
                    let (month, day) = (given_dollars(args, "monthly-usd", now.monthly_usd)?, given_dollars(args, "daily-usd", now.daily_usd)?);
                    apply!(d, args, format!("let the CI spend on machines {} a month and {} a day", or_no_limit(&month), or_no_limit(&day)), "/routing", &[field("action", "monthly_usd"), field("usd", month), field("daily", day)]);
                }
            }
            let v = view(&mut d)?;
            let routing = v.routing();
            let (cpu, hours, spent, today) = (routing.max_cpu.unwrap_or(superci_core::plane::MAX_CPU), routing.max_minutes.unwrap_or(superci_core::plane::MAX_JOB_MINUTES) / 60, v.spend_total(), v.spend_today_total());
            Ok(Done { said: vec![month_line("The CI", spent, routing.monthly_usd), day_line(today, routing.daily_usd), format!("A label may ask for up to {cpu} CPUs."), format!("A job may run for up to {hours} hours (6 at most on Cloudflare, 24 on Modal).")],
                data: json!({ "ok": true, "max_cpu": cpu, "max_hours": hours, "monthly_usd": routing.monthly_usd, "spent_usd": spent, "daily_usd": routing.daily_usd, "spent_today_usd": today }) })
        }
        ("public_repos", "list") => {
            let allowed = view(&mut signed_in())?.routing().public_repos;
            Ok(Done { said: if allowed.is_empty() { vec!["No public repository is allowed to run here. Allow one: `superci public_repos create OWNER/REPO`.".into()] } else { allowed.clone() }, data: json!({ "public_repos": allowed }) })
        }
        ("public_repos", operation @ ("create" | "delete")) => {
            let action = if operation == "create" { "add" } else { "remove" };
            if w(2).is_empty() { return usage(format!("Say which: `superci public_repos {operation} OWNER/REPO`.")) }
            let mut d = ready_to_set()?;
            in_use(&d)?;
            apply!(d, args, if action == "add" { format!("let the public repository {} run here", w(2)) } else { format!("stop the public repository {} from running here", w(2)) }, "/routing", &[field("action", format!("public_{action}")), field("repo", w(2))]);
            Ok(Done::said(if action == "add" { format!("{} may run here (never a fork's pull request).", w(2)) } else { format!("{} no longer runs here.", w(2)) }))
        }

        ("connections", "delete") if w(2) == "github" => {
            if w(3).is_empty() { return usage("Say which: `superci connections delete github OWNER --confirm`.") }
            let would = format!("uninstall the GitHub App of {}: its jobs then wait for runners that never come", w(3));
            confirmed(args, &would)?;
            let mut d = ready()?;
            let apps = view(&mut d)?.status.as_ref().and_then(|s| s["apps"].as_array().cloned()).unwrap_or_default();
            let app = apps.iter().find(|a| a["owner"].as_str().is_some_and(|o| o.eq_ignore_ascii_case(w(3)))).ok_or_else(|| format!("{} is not connected here.", w(3)))?;
            Ok(Done::said(apply!(d, args, would, "/github/remove", &[field("app", app["id"].as_u64().unwrap_or_default().to_string())])))
        }
        ("connections", "create") if w(2) == "gitlab" => {
            let name = args.get("token-env").unwrap_or("SUPERCI_GITLAB_TOKEN");
            let Some(token) = std::env::var(name).ok().filter(|t| !t.trim().is_empty()) else {
                return usage(format!("Give the GitLab token by name: {name} (a project, group or personal access token with the scopes api, create_runner and manage_runner). It goes to your control plane, and is not kept on this machine."))
            };
            let url = args.get("url").unwrap_or("https://gitlab.com");
            let mut d = ready()?;
            in_use(&d)?;
            let said = apply!(d, args, format!("connect {url} with the token in {name}"), "/gitlab/connect", &[field("url", url), field("token", token), field("which", args.get("gitlab").unwrap_or_default())]);
            Ok(Done::said(if said.is_empty() { "GitLab is connected. Its projects send jobs here once switched on: `superci projects list`, then `superci projects update PROJECT_ID --enabled=true`.".to_string() } else { said }))
        }
        ("projects", "list") => {
            let mut d = signed_in();
            let (view, key) = look(&mut d)?;
            let v = crate::cloudflare::plane_get(view.plane.url(), &key, &format!("/gitlab/projects?g={}", args.get("gitlab").unwrap_or_default()))?;
            let said = v["projects"].as_array().into_iter().flatten().map(|p| format!("{:>10}  {}  {}", p["id"].as_u64().unwrap_or_default(), if p["enabled"] == true { "on " } else { "off" }, p["path"].as_str().unwrap_or_default())).collect::<Vec<_>>();
            Ok(Done { said: if said.is_empty() { vec!["No projects this token can reach.".into()] } else { said }, data: v })
        }
        ("projects", "update") => {
            let Some(enabled) = truth(args, "enabled")? else { return usage("Say which way: `superci projects update PROJECT_ID --enabled=true` (or false).") };
            let mut fields = vec![field("gitlab", args.get("gitlab").unwrap_or_default())];
            let would = match (enabled, args.has("all"), w(2)) {
                (true, true, _) => { fields.push(field("all", "on")); "send every project's jobs here".to_string() }
                (false, true, _) => return usage("Projects are switched off one at a time: `superci projects update PROJECT_ID --enabled=false`."),
                (_, _, "") => return usage("Say which: `superci projects update PROJECT_ID --enabled=true` (ids are in `superci projects list`)."),
                (_, _, id) => { fields.push(field("id", id)); fields.push(field("enabled", if enabled { "true" } else { "false" })); format!("{} project {id}'s jobs here", if enabled { "send" } else { "stop sending" }) }
            };
            let mut d = ready_to_set()?;
            in_use(&d)?;
            apply!(d, args, would, "/gitlab/project", &fields);
            Ok(Done::said(if enabled { "Its jobs come here now (tags: superci)." } else { "Its jobs no longer come here." }))
        }
        ("connections", "delete") if w(2) == "gitlab" => {
            let would = "disconnect that GitLab: its projects stop sending jobs here and its token is forgotten";
            confirmed(args, would)?;
            let mut d = ready()?;
            in_use(&d)?;
            apply!(d, args, would, "/gitlab/disconnect", &[field("gitlab", w(3))]);
            Ok(Done::said("GitLab is disconnected."))
        }
        // (`superci connections create github OWNER` opens the browser: see `in_browser`.)
        ("connections", operation @ ("create" | "delete")) => usage(if operation == "create" { "Say which: `superci connections create github OWNER`, or `superci connections create gitlab --url=https://gitlab.com`." } else { "Say which: `superci connections delete github OWNER --confirm`, or `superci connections delete gitlab [ID] --confirm`." }),
        (word, operation) => usage(match HELP.iter().find(|(w, ..)| *w == word) {
            Some(_) if operation.is_empty() => format!("`superci {word}` takes an operation."),
            Some(_) => format!("`{operation}` is not an operation of `superci {word}`."),
            None if word.is_empty() => String::new(),
            None => format!("`{word}` is not a command of superci."),
        }),
    }
}

/// A limit in dollars a month as a command gives it: an amount above zero, or `none` (empty: no limit).
fn dollars(given: &str) -> Result<String> {
    if given == "none" { return Ok(String::new()) }
    match given.parse::<f64>() { Ok(n) if n > 0.0 && n.is_finite() => Ok(given.to_string()), _ => Err("A limit is dollars a month (`--monthly-usd=200`), or `none`.".into()) }
}

/// A limit a flag gives (`none` lifts it), or the one that stands when the flag was not given: as the page's field.
fn given_dollars(args: &Args, flag: &str, now: Option<f64>) -> Result<String> {
    match args.get(flag) { Some(given) => dollars(given), None => Ok(now.map(|n| n.to_string()).unwrap_or_default()) }
}

/// A limit as a sentence has it: `$200`, or `without limit`.
fn or_no_limit(usd: &str) -> String { if usd.is_empty() { "without limit".to_string() } else { format!("up to ${usd}") } }

/// What was spent on machines today (UTC) and the day's limit, in a line.
fn day_line(spent: f64, cap: Option<f64>) -> String {
    match cap { Some(cap) => format!("Today (UTC): ${spent:.2} of {} allowed.", superci_core::plane::dollars(cap)), None => format!("Today (UTC): ${spent:.2}; no limit for a day is set.") }
}

/// What was spent on machines this month and the limit it counts against, in a line.
fn month_line(whose: &str, spent: f64, cap: Option<f64>) -> String {
    match cap { Some(cap) => format!("{whose} spent ${spent:.2} on machines this month, of {} allowed.", superci_core::plane::dollars(cap)), None => format!("{whose} spent ${spent:.2} on machines this month; no limit is set.") }
}

/// `superci dashboard`, `superci login [cloud]` and `superci connections create github`: the dashboard, or the dashboard opened
/// for the one thing a person does in the browser (it ends when that is done). None: not one of these.
pub fn in_browser(args: &Args) -> Option<Result<()>> {
    let open = !args.has("no-browser");
    if !matches!((args.word(0), args.word(1), args.word(2)), ("dashboard", "", _) | ("login", _, _) | ("connections", "create", "github")) { return None }
    // The dashboard serves every workspace: with several and none named it opens on the list of them.
    if args.word(0) == "dashboard" {
        return Some(match which_workspace(args, false) {
            Ok(Which::One(name)) => { IN.with(|w| *w.borrow_mut() = name); signed_in().serve(open, false).map_err(Fail::from) }
            Ok(Which::Several(_)) => Dashboard::signed_in(None).serve(open, true).map_err(Fail::from),
            Err(e) => Err(e),
        })
    }
    if let Err(e) = enter(args) { return Some(Err(e)) }
    match (args.word(0), args.word(1)) {
        ("login", cloud) => {
            let cloud: Option<&'static str> = match cloud {
                "" => None,
                c => match CLOUDS.iter().find(|k| **k == c) { Some(k) => Some(*k), None => return Some(usage("Say which: `superci login aws`, `cloudflare` or `modal`.")) },
            };
            let mut d = signed_in();
            // `--add`: one more AWS account beside those signed in to (a sign-in adds an account; it replaces none).
            let add = args.has("add") && cloud == Some("aws");
            let there = match cloud { Some(c) => d.signed_in_as().is_some_and(|s| s.to_lowercase().contains(c)), None => d.signed_in_as().is_some() };
            if there && !add {
                println!("SuperCI is signed in on this computer: {}. `superci logout` removes it.{}", d.signed_in_as().unwrap_or_default(), if cloud == Some("aws") { " `superci login aws --add` signs in to another AWS account beside it." } else { "" });
                return Some(Ok(()))
            }
            d.adding = add;
            Some(d.for_task(Task::Login(cloud)).serve(open, false).map_err(Fail::from))
        }
        ("connections", "create") => Some((|| {
            let owner = args.word(3);
            if owner.is_empty() { return usage("Say whose repositories: `superci connections create github OWNER` (an organization, or your own GitHub name).") }
            let d = ready()?;
            let plane = in_use(&d)?;
            // GitHub shows the page that creates an organization's App to its owners only: what to send one.
            let note = crate::dashboard::owner_note(owner, &plane.place());
            if args.has("dry-run") { println!("Would open GitHub in the browser, for a person to create the App for {owner} and choose its repositories. Nothing was changed.\nOnly an owner of {owner} can create it. A note to send one:\n\n{note}"); return Ok(()) }
            println!("Only an owner of {owner} can create its App (GitHub shows anyone else a 404). Not an owner? `superci connections create github {owner} --dry-run` prints a note to send one.");
            Ok(d.for_task(Task::GitHub { login: owner.to_string(), host: args.get("host").unwrap_or_default().to_string(), started: false, done: false }).serve(open, false)?)
        })()),
        _ => None,
    }
}

/// What an AWS account allows, in lines: what kind of account it is for SuperCI, its regions, spot and on-demand, and
/// how many vCPUs it may run.
pub fn aws_look_lines(account: &str, who: &str, look: &crate::aws::Look) -> Vec<String> {
    use crate::aws::{Answer, Kind};
    let whose = |a: &Answer| match a {
        Answer::Allowed => "allowed".to_string(),
        Answer::Refused(r) => format!("refused by {}", refused_by(r)),
        Answer::Unknown(e) => format!("not known (AWS answered: {})", e.chars().take(140).collect::<String>()),
    };
    let mut out = vec![format!("AWS account   {account}{}", if who.is_empty() { String::new() } else { format!(" · signed in as {who}") })];
    out.push(format!("Kind          {}", match look.kind() {
        Kind::Open => "open: nothing SuperCI does is refused".to_string(),
        Kind::Unanswered => format!("not known: AWS did not answer ({})", look.unanswered().unwrap_or_default().chars().take(140).collect::<String>()),
        Kind::Project { region, activated: false } => format!("an AWS project (AWS's new sign-up): it works in {region} only, and spot machines are refused"),
        Kind::Project { region, activated: true } => format!("an AWS project (AWS's new sign-up): it works in {region} only, with spot machines"),
        Kind::Restricted => "restricted: some regions or spot machines are refused".to_string(),
    }));
    let allowed = look.allowed_regions();
    let refused: Vec<&(String, Answer)> = look.regions.iter().filter(|(_, a)| !a.allowed()).collect();
    out.push(format!("Regions       {}", if allowed.is_empty() { "none allowed".to_string() } else { format!("allowed: {}", allowed.join(", ")) }));
    // Refusals alike are said once, with their regions.
    let mut said: Vec<(String, Vec<&str>)> = vec![];
    for (region, answer) in refused { let why = whose(answer); match said.iter_mut().find(|(w, _)| *w == why) { Some((_, regions)) => regions.push(region), None => said.push((why, vec![region])) } }
    for (why, regions) in said { out.push(format!("              {why}: {}", regions.join(", "))) }
    let at = look.asked_in.as_deref().map(|r| format!(" (asked in {r})")).unwrap_or_default();
    if let Some(spot) = &look.spot { out.push(format!("Spot          {}{at}", whose(spot))) }
    if let Some(on_demand) = &look.on_demand { out.push(format!("On-demand     {}{at}", whose(on_demand))) }
    let cpus = |n: Option<u32>| n.map(|n| format!("{n} vCPUs")).unwrap_or_else(|| "not known".into());
    if look.asked_in.is_some() { out.push(format!("At once       spot {} · on-demand {}", cpus(look.spot_cpus), cpus(look.on_demand_cpus))) }
    // Few enough to hold jobs back (a new account's): where to ask AWS for more.
    if let Some((cpus, link)) = look.low_limit() { out.push(format!("              {cpus} vCPUs is {} of the default size at a time. Ask AWS for more: {link}", if cpus < 8 { "one job".to_string() } else { format!("{} jobs", cpus / 4) })) }
    let without = look.regions_without_image();
    if !without.is_empty() { out.push(format!("Runner image  not in {}: jobs cannot start there until it is copied in", without.join(", "))) }
    if let Some(org) = &look.organization_id {
        let managed = look.management_account.as_deref().filter(|m| *m != account);
        out.push(format!("Organization  {org}{}", match managed { Some(m) => format!(", managed from account {m}: its policies are not this account's to read or change"), None => ", managed from this account".to_string() }));
    }
    out
}

/// Whose rule a refusal is, in words.
fn refused_by(r: &superci_core::aws::Refusal) -> String {
    use superci_core::aws::By;
    let policy = r.policy_id().map(|p| format!(" {p}")).unwrap_or_default();
    match r.by {
        By::Organization => format!("your AWS organization's policy{policy}{}", r.management_account().map(|a| format!(" (management account {a})")).unwrap_or_default()),
        By::OrganizationResources => format!("your AWS organization's resource policy{policy}"),
        By::Boundary => "the permissions boundary of the role signed in as".to_string(),
        By::Identity => "the permissions of the role signed in as".to_string(),
        By::Session => "this sign-in's session policy".to_string(),
        By::Resource => "the resource's own policy".to_string(),
        By::Unsaid => "AWS, which did not say whose rule it is".to_string(),
    }
}

fn status_lines(v: &Value) -> Vec<String> {
    let mut out = vec![format!("Signed in     {}", v["signed_in"].as_str().unwrap_or_default())];
    if v["workspaces"].as_u64().unwrap_or(0) > 1 { out.insert(0, format!("Workspace     {}", v["workspace"].as_str().unwrap_or_default())) }
    let p = &v["control_plane"];
    if p.is_null() { out.push(format!("Control plane none found in the clouds signed in to. {}", NO_PLANE.trim_start_matches("There is no control plane yet. "))); return out }
    let s = |x: &Value| x.as_str().unwrap_or_default().to_string();
    out.push(format!("Control plane {} · {}{}", s(&p["where"]), p["version"].as_str().unwrap_or("not answering"), p["update_to"].as_str().map(|to| format!(" (update to {to}: `superci planes update`)")).unwrap_or_default()));
    out.push(format!("Address       {}", s(&p["url"])));
    out.push(format!("Jobs can run  {}", if p["ready"] == true { "yes" } else { "not yet: it needs repositories (`superci connections create github OWNER`) and a runner provider (`superci runners create aws`)" }));
    let st = &v["status"];
    if st.is_null() { out.push("Its jobs could not be read just now (it did not answer with this machine's key yet). Try again in a moment.".into()); return out }
    let jobs = st["jobs"].as_array().cloned().unwrap_or_default();
    let count = |states: &[&str]| jobs.iter().filter(|j| states.contains(&j["state"].as_str().unwrap_or_default())).count();
    out.push(format!("Jobs          {} listed · {} running · {} starting · {} waiting", jobs.len(), count(&["running"]), count(&["launching", "launched"]), count(&["waiting"])));
    out
}

/// `superci workspaces …`: the workspaces kept on this machine. Each is read from its own folder; no cloud is asked.
fn workspaces(args: &Args) -> Result<Done> {
    let w = |i: usize| args.word(i);
    let root = store::root().ok_or("SuperCI keeps nothing on this machine (it has no home folder).")?;
    let id = w(2).trim().to_lowercase();
    let known = |id: &str| if store::workspaces_in(&root).iter().any(|n| n == id) { Ok(()) } else { Err(Fail::Failed(format!("There is no workspace with the id {id} on this machine (`superci workspaces list`)."))) };
    match w(1) {
        "list" => {
            let all = store::listed(&root, None);
            let line = |l: &store::Listed| {
                let mut parts: Vec<String> = vec![];
                if !l.name.is_empty() { parts.push(l.name.clone()) }
                parts.extend(l.hosts.iter().map(|(kind, name)| format!("{} {name}", if kind == "gitlab" { "GitLab" } else { "GitHub" })));
                if !l.place.is_empty() { parts.push(l.place.clone()) }
                if !l.signed_in { parts.push(if l.place.is_empty() { "nothing set up yet".into() } else { "signed out".into() }) }
                format!("{:<24} {}", l.id, parts.join(" · "))
            };
            let said = if all.is_empty() { vec!["None yet: the first one (default) is made when you sign in (`superci login`).".to_string()] } else { all.iter().map(line).collect() };
            let data: Vec<Value> = all.iter().map(|l| json!({ "id": l.id, "name": l.name, "hosts": l.hosts.iter().map(|(kind, name)| json!({ "kind": kind, "name": name })).collect::<Vec<_>>(), "control_plane": l.place, "signed_in": l.signed_in })).collect();
            Ok(Done { said, data: json!({ "workspaces": data }) })
        }
        "create" => {
            // Its name, as typed (several words are one name); its id is made from it.
            let name = args.words[2.min(args.words.len())..].join(" ");
            if name.is_empty() { return usage("Give it a name: `superci workspaces create AcmeCI`.") }
            superci_core::spec::valid_name(&name)?;
            let id = store::id_from(&name)?;
            if root.join("workspaces").join(&id).exists() { return Err(format!("There is a workspace with the id {id} already. Give this one another name.").into()) }
            if let Some(done) = dry(args, &format!("make an empty workspace called {name}, with the id {id}"), "workspaces", &[]) { return Ok(done) }
            store::Store::under(&root, &id).set_about(&store::About { name: name.clone(), ..Default::default() })?;
            Ok(Done { said: vec![format!("The workspace {name} is made, with nothing in it yet. Its id is {id}."), format!("Sign in to its clouds: `superci login --workspace={id}`, or open it: `superci dashboard --workspace={id}`.")], data: json!({ "ok": true, "workspace": id, "name": name }) })
        }
        "update" => {
            let Some(to) = args.get("id").map(|n| n.trim().to_lowercase()) else { return usage("Say its new id: `superci workspaces update ID --id=NEW`.") };
            if id.is_empty() { return usage("Say which: `superci workspaces update ID --id=NEW`.") }
            known(&id)?;
            store::valid_id(&to)?;
            if let Some(done) = dry(args, &format!("give the workspace {id} the id {to}"), "workspaces", &[]) { return Ok(done) }
            store::rename(&root, &id, &to)?;
            Ok(Done { said: vec![format!("The workspace {id} has the id {to} now.")], data: json!({ "ok": true, "workspace": to }) })
        }
        "delete" => {
            if id.is_empty() { return usage("Say which: `superci workspaces delete ID --confirm`.") }
            let would = format!("sign the workspace {id} out and forget it on this machine; nothing in its clouds is deleted");
            confirmed(args, &would)?;
            known(&id)?;
            if let Some(done) = dry(args, &would, "workspaces", &[]) { return Ok(done) }
            let store = store::Store::under(&root, &id);
            // As `superci logout` does there first (its key leaves its control plane, Cloudflare ends its sign-in).
            let mut said = Dashboard::signed_in(Some(store.clone())).logout()?;
            said.retain(|line| line != "Nothing was kept on this machine.");
            store.forget()?;
            said.push(format!("The workspace {id} is forgotten on this machine. Nothing in its clouds was deleted."));
            Ok(Done { data: json!({ "ok": true, "done": said }), said })
        }
        "" => usage("`superci workspaces` takes an operation."),
        operation => usage(format!("`{operation}` is not an operation of `superci workspaces`.")),
    }
}

fn jobs() -> Result<Done> {
    let mut d = signed_in();
    let jobs: Vec<Value> = view(&mut d)?.jobs().iter().map(job_words).collect();
    let said = jobs.iter().take(40).map(job_line).collect::<Vec<_>>();
    Ok(Done { said: if said.is_empty() { vec!["No jobs yet.".into()] } else { said }, data: json!({ "jobs": jobs }) })
}

/// A job in a line: its id, how it stands, what it is, and (its runner, how long, its cost, why it failed or waits).
/// The control plane's latest jobs by run, each linked to where its code host is.
fn runs(v: &crate::view::PlaneView) -> Vec<Value> {
    let jobs: Vec<Value> = v.jobs().iter().map(|j| with_hosts(v, j)).collect();
    runs_of(&jobs)
}

fn run_line(r: &Value) -> String {
    let s = |k: &str| r[k].as_str().unwrap_or_default().to_string();
    let count = r["jobs"].as_u64().unwrap_or_default();
    let tail: Vec<String> = [format!("{count} {}", if count == 1 { "job" } else { "jobs" }), s("took"), r["usd"].as_f64().map(|c| format!("${c:.3}")).unwrap_or_default(), s("last_said")].into_iter().filter(|t| !t.is_empty()).collect();
    format!("{:<12} {:<9} {} · {}  ({})", r["id"].as_u64().unwrap_or_default(), s("state"), s("run"), s("in"), tail.join(" · "))
}

fn job_line(j: &Value) -> String {
    let s = |k: &str| j[k].as_str().unwrap_or_default().to_string();
    let tail: Vec<String> = [s("runner"), s("took"), j["usd"].as_f64().map(|c| format!("${c:.3}")).unwrap_or_default(), s("why")].into_iter().filter(|t| !t.is_empty()).collect();
    // (A job a machine ran to its end is said by how the job itself ended, when that is known: passed, failed.)
    let stands = Some(s("ended")).filter(|e| !e.is_empty()).unwrap_or_else(|| s("state"));
    format!("{:<12} {:<9} {} · {}{}", j["id"].as_u64().unwrap_or_default(), stands, s("job"), s("in"), if tail.is_empty() { String::new() } else { format!("  ({})", tail.join(" · ")) })
}

fn machine_words(m: &Value) -> String {
    let machine: superci_core::spec::Spec = serde_json::from_value(m.clone()).unwrap_or_default();
    // (As a label would say it, for what a command can copy; and in words.)
    let said = machine.describe();
    if machine.pairs().is_empty() { "each provider's standard machine (Linux, x64)".into() } else { format!("{said} ({})", machine.label("").trim_start_matches('/').replace('/', ", ")) }
}

fn runners_of(d: &mut Dashboard) -> Result<Done> {
    let view = view(d)?;
    let st = view.status.clone().unwrap_or_default();
    let order: Vec<Value> = view.order().into_iter().map(|p| json!({ "cloud": p.cloud, "off": p.off, "max_jobs": p.max_jobs, "monthly_usd": p.monthly_usd,
        "running": st["active"][&p.cloud].as_u64().unwrap_or(0), "spent_usd": st["spend"][&p.cloud].as_f64().unwrap_or(0.0) })).collect();
    let mut said: Vec<String> = order.iter().enumerate().map(|(i, p)| format!("{}. {:<14} {}{}{}", i + 1, p["cloud"].as_str().unwrap_or_default(), if p["off"] == true { "off  " } else { "" },
        p["max_jobs"].as_u64().map(|n| format!("up to {n} jobs at once  ")).unwrap_or_default(), p["monthly_usd"].as_f64().map(|n| format!("up to ${n} a month")).unwrap_or_default()).trim_end().to_string()).collect();
    if said.is_empty() { said.push("No runner provider yet: `superci runners create aws` (or cloudflare, or modal).".into()) }
    let machine = serde_json::to_value(view.machine()).unwrap_or_default();
    // (By the label workflows name here: the first of the control plane's.)
    said.push(format!("`runs-on: {}` gets: {}.", view.label(), machine_words(&machine)));
    Ok(Done { said, data: json!({ "ok": true, "order": order, "machine": machine, "aws_regions": view.aws_regions(), "aws_networks": st["aws_networks"], "cloudflare_location": st["cloudflare_location"], "cloudflare_image": st["cloudflare_image"] }) })
}

/// Where jobs come from: the GitHub accounts connected (with where each one's App is installed) and the GitLabs.
fn connections() -> Result<Done> {
    let view = view(&mut signed_in())?;
    let st = view.status.clone().unwrap_or_default();
    let mut said = vec![];
    for a in st["apps"].as_array().into_iter().flatten() {
        let installed = st["installations"].as_array().into_iter().flatten().filter(|i| i["app"] == a["id"]).map(|i| format!("{} ({} repositories)", i["account"].as_str().unwrap_or_default(), i["repositories"].as_str().unwrap_or("selected"))).collect::<Vec<_>>();
        said.push(format!("github  {}  {}", a["owner"].as_str().unwrap_or_default(), if installed.is_empty() { "its App is not installed yet".to_string() } else { format!("installed on {}", installed.join(", ")) }));
    }
    said.extend(view.gitlabs().into_iter().map(|g| format!("gitlab  {}{}", g.1, if g.0.is_empty() { String::new() } else { format!("  ({})", g.0) })));
    if said.is_empty() { said.push("Nothing is connected: `superci connections create github OWNER`, or `superci connections create gitlab --url=https://gitlab.com` (its token in SUPERCI_GITLAB_TOKEN).".into()) }
    Ok(Done { said, data: json!({ "github": st["apps"], "installations": st["installations"], "gitlab": st["gitlabs"] }) })
}

fn planes() -> Result<Done> {
    let mut d = signed_in();
    let (views, used): (Vec<PlaneView>, usize) = d.all()?;
    // One live: it is the one in use. Several: each is live, and none is "the" one (commands name theirs).
    let several = views.iter().filter(|v| v.serves_its_own()).count() > 1;
    let list: Vec<Value> = views.iter().enumerate().map(|(i, v)| { let mut p = plane_json(v); p["in_use"] = (!several && i == used).into(); p["live"] = v.serves_its_own().into(); p }).collect();
    let mut said: Vec<String> = list.iter().map(|p| format!("{}  {:<44} {}{}", p["id"].as_str().unwrap_or_default(), p["where"].as_str().unwrap_or_default(), p["version"].as_str().unwrap_or("not answering"), if p["in_use"] == true { "  in use" } else if several && p["live"] == true { "  live" } else { "" })).collect();
    if said.is_empty() { said.push(format!("No control plane in the clouds signed in to. {}", NO_PLANE.trim_start_matches("There is no control plane yet. "))) }
    // A sign-in that is over: said once, beside what the others reach.
    let notes = d.ended_notes();
    said.extend(notes.iter().cloned());
    let mut data = json!({ "control_planes": list });
    if !notes.is_empty() { data["notes"] = json!(notes) }
    Ok(Done { said, data })
}

#[cfg(test)]
mod tests {
    use super::*;

    fn args(line: &str) -> Args { Args::parse(&line.split_whitespace().map(str::to_string).collect::<Vec<_>>()).unwrap() }

    /// A limit a month is dollars or `none`; what was spent is said against it.
    #[test]
    fn a_monthly_limit_is_dollars_or_none() {
        assert_eq!((dollars("200").unwrap(), dollars("12.5").unwrap(), dollars("none").unwrap()), ("200".to_string(), "12.5".to_string(), String::new()));
        for bad in ["0", "-5", "lots", "", "inf"] { assert!(dollars(bad).is_err(), "{bad}") }
        assert_eq!(month_line("The CI", 14.224, Some(100.0)), "The CI spent $14.22 on machines this month, of $100 allowed.");
        assert_eq!(month_line("The AWS account", 0.0, None), "The AWS account spent $0.00 on machines this month; no limit is set.");
    }

    #[test]
    fn a_name_that_is_none_of_the_control_planes_here_stops_the_command() {
        let (id, url, place) = ("aaaaaaaaaaaa", "https://a.lambda-url.us-east-1.on.aws", "AWS · 111111111111 · us-east-1");
        // Nothing named: as before.
        name_plane(&args("status"));
        assert!(named_is(id, url, place).is_ok());
        // Named by its id or by its address: the one in use passes, another stops with what was named and where.
        name_plane(&args("runners update aws --max-jobs=5 --plane=aaaaaaaaaaaa"));
        assert!(named_is(id, url, place).is_ok());
        name_plane(&args("status --plane=https://a.lambda-url.us-east-1.on.aws/"));
        assert!(named_is(id, url, place).is_ok());
        name_plane(&args("runners update aws --max-jobs=5 --plane=bbbbbbbbbbbb"));
        let Err(Fail::Failed(said)) = named_is(id, url, place) else { panic!("another control plane named") };
        assert_eq!(said, "--plane names the control plane bbbbbbbbbbbb, which is not among the control planes here (this would have acted on aaaaaaaaaaaa, AWS · 111111111111 · us-east-1). Nothing was done. `superci planes list` lists them.");
        name_plane(&args("status"));
    }

    #[test]
    fn words_and_flags() {
        let a = args("runners update aws --max-jobs 5 --monthly-usd=200 --networks a --networks b --confirm");
        assert_eq!(a.words, ["runners", "update", "aws"]);
        assert!(a.has("confirm") && !a.has("json") && a.get("max-jobs") == Some("5") && a.get("monthly-usd") == Some("200") && a.all("networks") == ["a", "b"]);
        let parse = |line: &str| Args::parse(&line.split_whitespace().map(str::to_string).collect::<Vec<_>>()).err();
        assert_eq!(parse("status --jsno").unwrap(), Fail::Usage("--jsno is not a flag of superci".into()));
        assert_eq!(parse("planes create aws --region").unwrap(), Fail::Usage("--region needs a value".into()));
        assert!(args("-h").has("help") && args("-V").has("version"));
        assert_eq!(truth(&args("runners update aws --enabled=false"), "enabled"), Ok(Some(false)));
        assert_eq!(truth(&args("runners update aws"), "enabled"), Ok(None));
        assert!(matches!(truth(&args("runners update aws --enabled off"), "enabled"), Err(Fail::Usage(e)) if e == "--enabled is true or false, not off."));
    }

    #[test]
    fn help_for_all_and_for_each() {
        let all = help("");
        // Every resource's commands are in the list of all, and each has help of its own.
        for (word, usage, _) in HELP {
            assert!(all.contains(usage), "{word} is in the list");
            let one = help(word);
            assert!(one.starts_with(usage) && one.contains("--json") && !one.contains("Runners:"), "{word} has its own help");
        }
        assert!(all.starts_with("SuperCI —") && all.contains("superci <resource> <operation> [id] [--param=value]") && all.contains("superci help RESOURCE") && all.contains("SUPERCI_HOME") && all.contains("--workspace=ID") && help("workspaces").contains("SUPERCI_WORKSPACE=ID"));
        assert!(help("runners").contains("aws-on-demand") && help("connections").contains("SUPERCI_GITLAB_TOKEN") && help("connections").contains("GitHub offers that nowhere else"));
        // Every command `run` and `in_browser` know is in some resource's lines.
        for command in ["superci dashboard", "superci login", "superci logout", "superci status", "superci jobs list", "superci jobs retrieve ID", "superci runs list", "superci runs retrieve ID", "superci keys list", "superci keys create NAME", "superci keys delete NAME",
            "superci runners list", "superci runners create", "superci runners update CLOUD", "superci runners order", "superci runners delete CLOUD", "superci labels list", "superci labels create NAME", "superci labels delete NAME", "superci machine retrieve", "superci machine update", "superci limits retrieve", "superci limits update",
            "superci planes list", "superci planes create", "superci planes update", "superci planes move ID", "superci planes allow", "superci planes delete ID", "superci leave --confirm", "superci connections list", "superci connections create github OWNER", 
            "superci deliveries list", "superci deliveries retrieve ID", "superci connections create gitlab", "superci connections delete github OWNER", "superci connections delete gitlab", "superci projects list", "superci projects update", "superci public_repos list", "superci public_repos create", "superci public_repos delete",
            "superci accounts list", "superci accounts retrieve aws", "superci deliveries list", "superci projects update PROJECT_ID",
            "superci workspaces list", "superci workspaces create NAME", "superci workspaces update ID --id=NEW", "superci workspaces delete ID --confirm"] {
            assert!(all.contains(command), "{command}");
        }
    }

    #[test]
    fn what_a_person_is_needed_for() {
        assert_eq!(needs(NOT_SIGNED_IN), Some("superci login"));
        assert_eq!(needs(AWS_ENDED), Some("superci login aws"));
        assert_eq!(needs("Sign in with AWS first."), Some("superci login aws"));
        assert_eq!(needs("Sign in with Cloudflare first"), Some("superci login cloudflare"));
        assert_eq!(needs("the Cloudflare sign-in expired: sign in again"), Some("superci login cloudflare"));
        assert_eq!(needs("Sign in with Modal first: Its runners come along with the move."), Some("superci login modal"));
        assert_eq!(needs("3 jobs are running on AWS: Remove it when they finish, or stop them as you remove it."), None);
    }

    /// With SuperCI signed in nowhere, every command says so and asks for the sign-in; one that deletes asks for
    /// --confirm before anything else; half a command is said to be half, and what is none, none.
    #[test]
    fn nothing_runs_unasked_or_signed_out() {
        let dir = std::env::temp_dir().join(format!("superci-commands-{}-{}", std::process::id(), superci_core::crypto::random_id(6)));
        std::env::set_var("SUPERCI_HOME", &dir);
        for name in ["SUPERCI_GITLAB_TOKEN", "SUPERCI_KEY", "SUPERCI_PLANE"] { std::env::remove_var(name) }
        let run = |line: &str| run(&args(line), &mut |_| {}).map(|d| d.said).unwrap_err();
        let signed_out = Fail::Failed(NOT_SIGNED_IN.into());
        for line in ["status", "jobs list", "jobs retrieve 7", "runs list", "runs retrieve 7", "deliveries list", "deliveries retrieve 7", "keys list", "keys create agent", "keys delete agent", "runners list", "labels list", "labels create acmeci", "name retrieve", "name update AcmeCI", "connections list", "planes list", "public_repos list", "machine retrieve", "machine update --cpu=8",
            "planes update", "planes create modal", "planes create aws --region=us-east-1", "runners create aws", "runners order aws", "runners update aws --max-jobs=3", "limits retrieve", "limits update --max-cpu=8", "limits update --max-hours 12",
            "public_repos create acme/site", "public_repos delete acme/site", "projects list", "projects update 7 --enabled=true", "projects update --all --enabled=true", "planes allow", "planes move abcdef123456",
            "planes update --dry-run", "runners create cloudflare --dry-run"] {
            assert_eq!(run(line), signed_out, "{line}");
        }
        for line in ["planes delete abcdef123456", "leave", "runners delete aws", "labels delete superci", "connections delete github acme", "connections delete gitlab"] {
            assert!(matches!(run(line), Fail::Unconfirmed(e) if e.starts_with("This would ") && e.ends_with("Add --confirm to do it, or --dry-run to check it first.")), "{line}");
            assert_eq!(run(&format!("{line} --confirm")), signed_out, "{line}");
            assert_eq!(run(&format!("{line} --dry-run")), signed_out, "{line}: a dry run checks the sign-in too");
        }
        for (line, says) in [("runners create gcp", "Say which: `superci runners create aws`"), ("planes create", "Say where: `superci planes create aws"), ("planes create aws", "Say where: --region"), ("planes move", "Say where to:"), ("planes delete", "Say which:"),
            ("runners order", "Say the order:"), ("public_repos create", "Say which:"), ("connections create gitlab", "Give the GitLab token by name: SUPERCI_GITLAB_TOKEN"), ("connections create gitlab --token-env MY_TOKEN", "Give the GitLab token by name: MY_TOKEN"),
            ("jobs retrieve", "Say which: `superci jobs retrieve ID`"), ("runs retrieve", "Say which: `superci runs retrieve ID`"), ("jobs retrieve seven", "Say which: `superci jobs retrieve ID`"), ("keys create", "Give it a name:"), ("keys delete", "Say which:"), ("name update", "Say what to call it:"), ("keys create agent --days soon", "--days is a number"),
            ("projects update 7", "Say which way:"), ("projects update --all --enabled=false", "Projects are switched off one at a time"),
            ("planes", "`superci planes` takes an operation."), ("limits", "`superci limits` takes an operation."), ("runners frob", "`frob` is not an operation of `superci runners`."), ("limits set", "`set` is not an operation of `superci limits`."),
            ("aws", "`aws` is not a command of superci."), ("accounts", "`superci accounts` takes an operation."), ("accounts frob", "`frob` is not an operation of `superci accounts`."), ("accounts retrieve", "Say which cloud's:"), ("accounts retrieve modal", "Say which cloud's:"),
            ("deliveries", "`superci deliveries` takes an operation."), ("projects frob", "`frob` is not an operation of `superci projects`."),
            ("connections create", "Say which: `superci connections create github OWNER`"), ("connections create bitbucket x", "Say which: `superci connections create github OWNER`"), ("connections delete", "Say which: `superci connections delete github OWNER --confirm`"), ("connections delete github", "Say which: `superci connections delete github OWNER --confirm`."),
            ("github list", "`github` is not a command of superci."), ("gitlab create", "`gitlab` is not a command of superci."), ("github_deliveries list", "`github_deliveries` is not a command of superci."), ("frobnicate", "`frobnicate` is not a command of superci.")] {
            assert!(matches!(run(line), Fail::Usage(e) if e.starts_with(says)), "{line}");
        }
        assert_eq!(super::run(&args("logout"), &mut |_| {}).unwrap().said, ["Nothing was kept on this machine."]);
        // A cloud is what an operation takes, never a command of its own.
        assert_eq!(super::run(&args("accounts list"), &mut |_| {}).unwrap().said, [NOT_SIGNED_IN]);
        assert_eq!(run("accounts retrieve aws"), Fail::Failed("Sign in with AWS first.".into()));
        assert_eq!(needs("Sign in with AWS first."), Some("superci login aws"));
        // What opens the browser asks for the same first.
        assert!(matches!(in_browser(&args("login gcp")), Some(Err(Fail::Usage(_)))) && matches!(in_browser(&args("connections create github")), Some(Err(Fail::Usage(_)))));
        assert_eq!(in_browser(&args("connections create github acme")).unwrap().unwrap_err(), signed_out);
        assert!(in_browser(&args("status")).is_none() && in_browser(&args("connections list")).is_none() && in_browser(&args("connections create gitlab")).is_none());
        // A key that only reads, given by name, is no sign-in: a change says so, and names what is needed.
        std::env::set_var("SUPERCI_PLANE", "https://plane.example");
        std::env::set_var("SUPERCI_KEY", "superci_read_x");
        assert_eq!(run("runners create aws"), Fail::Failed(ONLY_READS.into()));
        assert_eq!(needs(ONLY_READS), Some("superci login"));
        std::env::set_var("SUPERCI_PLANE", "plane.example");
        assert!(matches!(run("status"), Fail::Usage(e) if e.starts_with("SUPERCI_PLANE is the control plane's address")));
        for name in ["SUPERCI_KEY", "SUPERCI_PLANE"] { std::env::remove_var(name) }
        // Workspaces. None yet: the first one is there without being made, and another name is none.
        std::env::remove_var("SUPERCI_WORKSPACE");
        let ok = |line: &str| super::run(&args(line), &mut |_| {}).unwrap().said;
        assert_eq!(ok("workspaces list"), ["None yet: the first one (default) is made when you sign in (`superci login`)."]);
        assert_eq!(run("status --workspace=acme"), Fail::Failed("--workspace names the workspace acme, and none is called that on this machine (the only one is default). Nothing was done. `superci workspaces list` lists them.".into()));
        assert_eq!(run("status --workspace=default"), signed_out);
        // One: nothing needs naming.
        assert_eq!(ok("workspaces create Acme")[0], "The workspace Acme is made, with nothing in it yet. Its id is acme.");
        assert_eq!(run("status"), signed_out);
        assert_eq!(run("workspaces create acme"), Fail::Failed("There is a workspace with the id acme already. Give this one another name.".into()));
        // Two: a command says which, or stops and lists them. Nothing picks one.
        assert_eq!(ok("workspaces create Globex CI")[0], "The workspace Globex CI is made, with nothing in it yet. Its id is globex-ci.");
        ok("workspaces update globex-ci --id=globex");
        let which = Fail::Failed("2 workspaces are kept on this machine: acme, globex. Say which: --workspace=ID (or SUPERCI_WORKSPACE=ID). Nothing was done.".into());
        for line in ["status", "jobs list", "planes list", "runners update aws --max-jobs=3", "logout", "planes delete abcdef123456 --confirm", "name update AcmeCI"] { assert_eq!(run(line), which, "{line}") }
        assert_eq!(in_browser(&args("login aws")).unwrap().unwrap_err(), which);
        assert_eq!(in_browser(&args("connections create github acme")).unwrap().unwrap_err(), which);
        assert_eq!(run("status --workspace=globex"), signed_out);
        std::env::set_var("SUPERCI_WORKSPACE", "acme");
        assert_eq!(run("status"), signed_out);
        // What stops everything takes its workspace from the command itself, never from the terminal's variable.
        assert_eq!(run("leave --confirm"), Fail::Failed("2 workspaces are kept on this machine: acme, globex. Say which: --workspace=ID (on this command itself). Nothing was done.".into()));
        assert_eq!(run("leave --confirm --workspace=acme"), signed_out);
        // A name that is none of them stops the command: it never falls through to another.
        std::env::set_var("SUPERCI_WORKSPACE", "initech");
        assert_eq!(run("status"), Fail::Failed("SUPERCI_WORKSPACE names the workspace initech, and none is called that on this machine (here: acme, globex). Nothing was done. `superci workspaces list` lists them.".into()));
        assert_eq!(run("status --workspace=acme"), signed_out, "the flag comes before the variable");
        std::env::remove_var("SUPERCI_WORKSPACE");
        // The list, a new name, and forgetting one (which needs --confirm and a name that is one of them).
        assert_eq!(ok("workspaces list"), [format!("{:<24} Acme · nothing set up yet", "acme"), format!("{:<24} Globex CI · nothing set up yet", "globex")]);
        assert_eq!(ok("workspaces update globex --id=initech"), ["The workspace globex has the id initech now."]);
        assert_eq!(run("workspaces update acme --id=initech"), Fail::Failed("There is a workspace with the id initech already.".into()));
        assert!(matches!(run("workspaces delete initech"), Fail::Unconfirmed(e) if e.starts_with("This would sign the workspace initech out and forget it on this machine")));
        assert_eq!(run("workspaces delete nope --confirm"), Fail::Failed("There is no workspace with the id nope on this machine (`superci workspaces list`).".into()));
        assert_eq!(ok("workspaces delete initech --dry-run"), ["Would sign the workspace initech out and forget it on this machine; nothing in its clouds is deleted. Nothing was changed."]);
        assert_eq!(ok("workspaces delete initech --confirm"), ["The workspace initech is forgotten on this machine. Nothing in its clouds was deleted."]);
        assert_eq!(run("status"), signed_out, "one is left: nothing needs naming again");
        for (line, says) in [("workspaces", "`superci workspaces` takes an operation."), ("workspaces create", "Give it a name:"), ("workspaces create 9", "A name is 2 to 24 letters"), ("workspaces update acme", "Say its new id:"), ("workspaces delete", "Say which:"), ("workspaces frob", "`frob` is not an operation of `superci workspaces`.")] {
            assert!(matches!(run(line), Fail::Usage(e) | Fail::Failed(e) if e.starts_with(says)), "{line}");
        }
        let _ = std::fs::remove_dir_all(&dir);
    }

    #[test]
    fn a_dry_run_says_what_it_would_do() {
        let a = args("connections create gitlab --dry-run");
        let fields = [field("url", "https://gitlab.com"), field("token", "glpat-secret")];
        let done = dry(&a, "connect https://gitlab.com with the token in SUPERCI_GITLAB_TOKEN", "/gitlab/connect", &fields).unwrap();
        assert_eq!(done.said, ["Would connect https://gitlab.com with the token in SUPERCI_GITLAB_TOKEN. Nothing was changed."]);
        assert!(done.data["dry_run"] == true && done.data["form"]["to"] == "/gitlab/connect" && done.data["form"]["fields"]["token"] == "(given)" && !done.data.to_string().contains("glpat-secret"));
        assert!(dry(&args("connections create gitlab"), "x", "/gitlab/connect", &fields).is_none());
    }
}