semora-cli 0.5.0

mod common;

use std::collections::BTreeMap;
use std::path::PathBuf;

use common::*;
use serde_json::Value;

/// Runs the CLI from `dir` (not the Cli's own work folder).
async fn run_in(cli: &Cli, dir: PathBuf, args: &[&str]) -> Out {
    let mut cmd = cli.command(args);
    cmd.current_dir(dir);
    tokio::task::spawn_blocking(move || {
        let o = cmd.output().expect("run semora");
        Out {
            code: o.status.code().unwrap_or(-1),
            stdout: String::from_utf8_lossy(&o.stdout).into_owned(),
            stderr: String::from_utf8_lossy(&o.stderr).into_owned(),
        }
    })
    .await
    .unwrap()
}

fn read(cli: &Cli, rel: &str) -> String {
    std::fs::read_to_string(cli.path(rel)).unwrap_or_else(|e| panic!("{rel}: {e}"))
}

async fn ok(cli: &Cli, args: &[&str]) -> Out {
    let out = cli.run(args).await;
    assert_eq!(
        out.code, 0,
        "{args:?}\nstdout:\n{}\nstderr:\n{}",
        out.stdout, out.stderr
    );
    out
}

/// Checkout A makes project `proj` with a page, a bundle and a page at the root, and pushes
/// them. Checkout B has only the committed `.semora`.
async fn two_checkouts(server: &Server) -> (Cli, Cli) {
    let a = Cli::new(server);
    a.write("docs/plan.md", "# Plan\none\n");
    a.write("docs/site/index.md", "# Site\n");
    a.write("docs/site/style.css", "body { color: red }\n");
    a.write("notes.md", "# Notes\n");
    ok(&a, &["project", "init", ".", "--name", "proj"]).await;
    for p in ["docs/plan.md", "docs/site", "notes.md"] {
        ok(&a, &["push", p]).await;
    }
    let b = Cli::new(server);
    b.write(
        ".semora",
        format!("server = \"{}\"\nproject = \"proj\"\n", server.url),
    );
    (a, b)
}

fn paths(v: &Value, list: &str) -> Vec<String> {
    let mut out: Vec<String> = v[list]
        .as_array()
        .unwrap_or_else(|| panic!("no {list} in {v}"))
        .iter()
        .map(|d| d["path"].as_str().unwrap().to_string())
        .collect();
    out.sort();
    out
}

fn note_of(v: &Value, list: &str, path: &str) -> String {
    v[list]
        .as_array()
        .unwrap()
        .iter()
        .find(|d| d["path"] == path)
        .and_then(|d| d["note"].as_str())
        .unwrap_or_else(|| panic!("no note for {path} in {list}: {v}"))
        .to_string()
}

#[tokio::test(flavor = "multi_thread")]
async fn pull_copies_every_document_to_its_path() {
    let server = Server::start().await;
    let (_a, b) = two_checkouts(&server).await;
    let out = ok(&b, &["pull", "--json"]).await.json();
    assert_eq!(
        paths(&out, "written"),
        ["docs/plan.md", "docs/site", "notes.md"],
        "{out}"
    );
    assert_eq!(read(&b, "docs/plan.md"), "# Plan\none\n");
    assert_eq!(read(&b, "docs/site/index.md"), "# Site\n");
    assert_eq!(read(&b, "docs/site/style.css"), "body { color: red }\n");
    assert_eq!(read(&b, "notes.md"), "# Notes\n");
    let ignore = read(&b, ".semora-state/.gitignore");
    assert!(
        ignore.lines().any(|l| l == "*"),
        "the record ignores itself: {ignore}"
    );

    let again = ok(&b, &["pull"]).await;
    assert!(
        again.stdout.contains("Nothing new in proj: 3 documents"),
        "{}",
        again.stdout
    );
}

#[tokio::test(flavor = "multi_thread")]
async fn a_second_pull_writes_only_what_is_newer() {
    let server = Server::start().await;
    let (a, b) = two_checkouts(&server).await;
    ok(&b, &["pull"]).await;
    a.write("docs/plan.md", "# Plan\ntwo\n");
    ok(&a, &["push", "docs/plan.md"]).await;
    let out = ok(&b, &["pull", "--json"]).await.json();
    assert_eq!(paths(&out, "written"), ["docs/plan.md"], "{out}");
    assert_eq!(out["written"][0]["rev"], 2);
    assert_eq!(paths(&out, "unchanged"), ["docs/site", "notes.md"]);
    assert_eq!(read(&b, "docs/plan.md"), "# Plan\ntwo\n");
}

#[tokio::test(flavor = "multi_thread")]
async fn pull_keeps_a_file_changed_here_and_force_takes_the_servers() {
    let server = Server::start().await;
    let (a, b) = two_checkouts(&server).await;
    ok(&b, &["pull"]).await;
    b.write("notes.md", "# Notes\nmine\n");
    b.write("docs/plan.md", "# Plan\nlocal only\n");
    a.write("notes.md", "# Notes\ntheirs\n");
    ok(&a, &["push", "notes.md"]).await;

    let out = ok(&b, &["pull", "--json"]).await.json();
    assert_eq!(paths(&out, "skipped"), ["notes.md"], "{out}");
    let why = note_of(&out, "skipped", "notes.md");
    assert!(
        why.contains("changed here and on the server") && why.contains("r1") && why.contains("r2"),
        "{why}"
    );
    assert_eq!(read(&b, "notes.md"), "# Notes\nmine\n", "not overwritten");
    assert!(
        note_of(&out, "unchanged", "docs/plan.md").contains("not pushed"),
        "{out}"
    );
    let text = ok(&b, &["pull"]).await.stdout;
    assert!(
        text.contains("skipped  notes.md")
            && text.contains("Changed here, not pushed yet: docs/plan.md"),
        "{text}"
    );

    let forced = ok(&b, &["pull", "--force", "--json"]).await.json();
    assert_eq!(paths(&forced, "written"), ["notes.md"], "{forced}");
    assert_eq!(read(&b, "notes.md"), "# Notes\ntheirs\n");
    assert_eq!(
        read(&b, "docs/plan.md"),
        "# Plan\nlocal only\n",
        "--force takes what is newer on the server, not every file"
    );
}

#[tokio::test(flavor = "multi_thread")]
async fn a_bundle_follows_its_new_revision() {
    let server = Server::start().await;
    let (a, b) = two_checkouts(&server).await;
    ok(&b, &["pull"]).await;
    b.write("docs/site/draft.md", "# Not pushed");
    std::fs::remove_file(a.path("docs/site/style.css")).unwrap();
    a.write("docs/site/extra.md", "# Extra\n");
    ok(&a, &["push", "docs/site"]).await;

    let out = ok(&b, &["pull", "--json"]).await.json();
    assert_eq!(
        paths(&out, "skipped"),
        ["docs/site"],
        "a file added here is a change here: {out}"
    );
    std::fs::remove_file(b.path("docs/site/draft.md")).unwrap();
    let out = ok(&b, &["pull", "--json"]).await.json();
    assert_eq!(paths(&out, "written"), ["docs/site"], "{out}");
    assert_eq!(read(&b, "docs/site/extra.md"), "# Extra\n");
    assert!(
        !b.path("docs/site/style.css").exists(),
        "a file the new revision dropped goes"
    );
}

#[tokio::test(flavor = "multi_thread")]
async fn a_document_deleted_on_the_server_goes_unless_it_changed_here() {
    let server = Server::start().await;
    let (a, b) = two_checkouts(&server).await;
    ok(&b, &["pull"]).await;
    b.write("docs/plan.md", "# Plan\nmine\n");
    let link = |p: &str| format!("{}/p/proj/{p}", server.url);
    for p in ["notes.md", "docs/plan.md", "docs/site"] {
        ok(&a, &["rm", &link(p)]).await;
    }
    let out = ok(&b, &["pull", "--json"]).await.json();
    assert_eq!(paths(&out, "deleted"), ["docs/site", "notes.md"], "{out}");
    assert_eq!(paths(&out, "skipped"), ["docs/plan.md"]);
    assert!(
        note_of(&out, "skipped", "docs/plan.md").contains("deleted on the server"),
        "{out}"
    );
    assert!(!b.path("notes.md").exists());
    assert!(
        !b.path("docs/site").exists(),
        "a bundle's folder goes when it is empty"
    );
    assert_eq!(read(&b, "docs/plan.md"), "# Plan\nmine\n", "kept");

    // The guard still knows: pushing it again means putting back a deleted document.
    let push = b.run(&["push", "docs/plan.md"]).await;
    assert_eq!(push.code, 5, "{}", push.stderr);
    assert!(push.stderr.contains("deleted"), "{}", push.stderr);
    let forced = ok(&b, &["push", "docs/plan.md", "--force", "--json"])
        .await
        .json();
    assert_eq!(forced["rev"], 1, "a new document at the path");
}

#[tokio::test(flavor = "multi_thread")]
async fn pull_with_a_path_takes_only_what_is_at_it_or_under_it() {
    let server = Server::start().await;
    let (_a, b) = two_checkouts(&server).await;
    let out = ok(&b, &["pull", "docs", "--json"]).await.json();
    assert_eq!(
        paths(&out, "written"),
        ["docs/plan.md", "docs/site"],
        "{out}"
    );
    assert!(!b.path("notes.md").exists());

    let other = Server::start().await;
    let (_a, c) = two_checkouts(&other).await;
    let out = ok(&c, &["pull", "docs/site/index.md", "--json"])
        .await
        .json();
    assert_eq!(
        paths(&out, "written"),
        ["docs/site"],
        "a path inside a bundle pulls the bundle: {out}"
    );

    // With no path, the folder it runs in is the scope.
    std::fs::create_dir_all(c.path("docs")).unwrap();
    let out = run_in(&c, c.path("docs"), &["pull", "--json"]).await;
    assert_eq!(out.code, 0, "{}", out.stderr);
    assert_eq!(paths(&out.json(), "written"), ["docs/plan.md"]);
    assert!(!c.path("notes.md").exists());
}

#[tokio::test(flavor = "multi_thread")]
async fn a_push_over_a_newer_revision_stops_with_exit_5() {
    let server = Server::start().await;
    let (a, b) = two_checkouts(&server).await;
    ok(&b, &["pull"]).await;
    a.write("docs/plan.md", "# Plan\nfrom A\n");
    ok(&a, &["push", "docs/plan.md"]).await;
    b.write("docs/plan.md", "# Plan\nfrom B\n");

    let push = b.run(&["push", "docs/plan.md"]).await;
    assert_eq!(push.code, 5, "{}\n{}", push.stdout, push.stderr);
    for want in [
        "r2 on the server, not r1",
        "--force",
        "semora pull --force docs/plan.md",
        "/p/proj/docs/plan.md",
    ] {
        assert!(push.stderr.contains(want), "{want}: {}", push.stderr);
    }
    let shown = ok(
        &a,
        &[
            "show",
            &format!("{}/p/proj/docs/plan.md", server.url),
            "--json",
        ],
    )
    .await
    .json();
    assert_eq!(shown["rev"], 2, "nothing was pushed");

    let forced = ok(&b, &["push", "docs/plan.md", "--force", "--json"])
        .await
        .json();
    assert_eq!(forced["rev"], 3);
    b.write("docs/plan.md", "# Plan\nfrom B, again\n");
    let next = ok(&b, &["push", "docs/plan.md", "--json"]).await.json();
    assert_eq!(next["rev"], 4, "the forced push was recorded");
    // A, which last pushed r2, is now behind.
    a.write("docs/plan.md", "# Plan\nA again\n");
    assert_eq!(a.run(&["push", "docs/plan.md"]).await.code, 5);
}

#[tokio::test(flavor = "multi_thread")]
async fn a_delete_from_this_folder_lets_the_next_push_make_it_again() {
    let server = Server::start().await;
    let (_a, b) = two_checkouts(&server).await;
    ok(&b, &["pull"]).await;
    ok(&b, &["rm", &format!("{}/p/proj/notes.md", server.url)]).await;
    let out = ok(&b, &["push", "notes.md", "--json"]).await.json();
    assert_eq!(out["rev"], 1, "a new document: {out}");
}

#[tokio::test(flavor = "multi_thread")]
async fn files_already_here_are_recorded_when_they_match_and_skipped_when_not() {
    let server = Server::start().await;
    let (_a, b) = two_checkouts(&server).await;
    b.write("notes.md", "# Notes\n");
    b.write("docs/plan.md", "# Plan\nwritten here first\n");
    let out = ok(&b, &["pull", "--json"]).await.json();
    assert_eq!(paths(&out, "written"), ["docs/site"], "{out}");
    assert_eq!(paths(&out, "unchanged"), ["notes.md"]);
    assert_eq!(paths(&out, "skipped"), ["docs/plan.md"]);
    assert!(
        note_of(&out, "skipped", "docs/plan.md").contains("never pulled"),
        "{out}"
    );
    assert_eq!(read(&b, "docs/plan.md"), "# Plan\nwritten here first\n");
    let status = ok(&b, &["status", "--json"]).await.json();
    let states: BTreeMap<String, String> = status["documents"]
        .as_array()
        .unwrap()
        .iter()
        .map(|d| {
            (
                d["path"].as_str().unwrap().to_string(),
                d["state"].as_str().unwrap().to_string(),
            )
        })
        .collect();
    assert_eq!(states["notes.md"], "clean", "{status}");
    assert_eq!(states["docs/plan.md"], "untracked", "{status}");
}

#[tokio::test(flavor = "multi_thread")]
async fn status_says_where_each_document_stands() {
    let server = Server::start().await;
    let (a, b) = two_checkouts(&server).await;
    a.write("docs/both.md", "# Both\n");
    ok(&a, &["push", "docs/both.md"]).await;
    ok(&b, &["pull"]).await;
    let clean = ok(&b, &["status"]).await.stdout;
    assert!(
        clean.contains("Everything here matches the server (4 documents)"),
        "{clean}"
    );

    b.write("notes.md", "# Notes\nhere\n");
    a.write("docs/plan.md", "# Plan\nthere\n");
    ok(&a, &["push", "docs/plan.md"]).await;
    a.write("docs/new.md", "# New\n");
    ok(&a, &["push", "docs/new.md"]).await;
    ok(&a, &["rm", &format!("{}/p/proj/docs/site", server.url)]).await;
    b.write("docs/both.md", "# Both\nhere\n");
    a.write("docs/both.md", "# Both\nthere\n");
    ok(&a, &["push", "docs/both.md"]).await;

    let status = ok(&b, &["status", "--json"]).await.json();
    let states: BTreeMap<String, (String, Value, Value)> = status["documents"]
        .as_array()
        .unwrap()
        .iter()
        .map(|d| {
            (
                d["path"].as_str().unwrap().to_string(),
                (
                    d["state"].as_str().unwrap().to_string(),
                    d["here"].clone(),
                    d["server"].clone(),
                ),
            )
        })
        .collect();
    let state = |p: &str| states[p].0.as_str();
    assert_eq!(state("notes.md"), "modified", "{status}");
    assert_eq!(state("docs/plan.md"), "behind");
    assert_eq!(
        (&states["docs/plan.md"].1, &states["docs/plan.md"].2),
        (&Value::from(1), &Value::from(2))
    );
    assert_eq!(state("docs/new.md"), "missing");
    assert_eq!(state("docs/site"), "deleted");
    assert_eq!(state("docs/both.md"), "diverged");

    let text = ok(&b, &["status"]).await.stdout;
    for want in [
        "changed here         notes.md",
        "newer on the server  docs/plan.md  (r1 here, r2 on the server)",
        "not here             docs/new.md",
        "deleted on the server  docs/site",
        "changed on both      docs/both.md",
    ] {
        let squeezed = |s: &str| s.split_whitespace().collect::<Vec<_>>().join(" ");
        assert!(squeezed(&text).contains(&squeezed(want)), "{want}:\n{text}");
    }
    let narrowed = ok(&b, &["status", "docs/plan.md", "--json"]).await.json();
    assert_eq!(
        narrowed["documents"].as_array().unwrap().len(),
        1,
        "{narrowed}"
    );
}

#[tokio::test(flavor = "multi_thread")]
async fn pull_outside_a_project_says_how_to_make_one() {
    let server = Server::start().await;
    let cli = Cli::new(&server);
    let out = cli.run(&["pull"]).await;
    assert_eq!(out.code, 1);
    assert!(out.stderr.contains("semora project init"), "{}", out.stderr);
}