boatramp_types/

authz.rs

//! Control-plane **authorization** vocabulary and RBAC policy.
//!
//! This is the wasm-clean, pure core of authorization: the `action × resource`
//! right vocabulary, the request → required-[`Right`] mapping (the analogue of
//! the old `required_scope`), the RBAC [`AuthzPolicy`] (roles → right
//! templates) with its built-in default, and the pure [`RightSet::allows`]
//! decision. The COSE/Cedar engine (`boatramp_core::cose` + `::cedar`) reuses these types
//! and mirrors [`RightSet::allows`]; keeping the semantics
//! here means the server, CLI, and tests can't drift from the token format.
//!
//! No IO, no async, no authz-engine dependency — so it compiles to the edge target
//! and is exhaustively unit-testable.

use std::collections::BTreeMap;

use serde::{Deserialize, Serialize};

/// What a principal may *do* to a resource. [`Action::Admin`] is the superuser
/// action: holding it on a resource satisfies any other action there.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Serialize, Deserialize)]
#[serde(rename_all = "lowercase")]
pub enum Action {
    /// Read/list (GET endpoints).
    Read,
    /// Mutate configuration (site config, aliases, domain verification, cache).
    Write,
    /// Ship content: create + activate deployments, upload blobs.
    Deploy,
    /// Full control of the resource (implies read/write/deploy).
    Admin,
}

/// A class of control-plane resource a [`Right`] governs. Two are **target-scoped**:
/// [`Resource::Site`] (target = `"<project>/<site>"`, the 0.2.0 project-qualified
/// form) and [`Resource::Project`] (target = `"<project>"`, governing the project's
/// **own** resources — functions, compute, workflows, and the project entity itself).
/// The rest are global.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Serialize, Deserialize)]
#[serde(rename_all = "lowercase")]
pub enum Resource {
    /// A single site (`target` = `"<project>/<site>"`): deployments, config, aliases, …
    Site,
    /// A project (`target` = `"<project>"`): its functions, compute, workflows, and
    /// project-level config/CRUD. The owning + tenant boundary above a site.
    Project,
    /// Content-addressed blob uploads (`PUT /api/blobs/<hash>`).
    Blobs,
    /// API token management (`/api/tokens`).
    Tokens,
    /// TLS certificate status (`/api/certs`).
    Certs,
    /// Cache invalidation (`/api/cache/invalidate`).
    Cache,
    /// Node/system operations: metrics, prune, scrub, site listing.
    System,
}

impl Resource {
    /// Every resource variant — used to expand the `admin` role to "all rights".
    pub const ALL: [Self; 7] = [
        Self::Site,
        Self::Project,
        Self::Blobs,
        Self::Tokens,
        Self::Certs,
        Self::Cache,
        Self::System,
    ];

    /// The serde term for this resource (matches `rename_all`).
    pub fn as_str(self) -> &'static str {
        match self {
            Self::Site => "site",
            Self::Project => "project",
            Self::Blobs => "blobs",
            Self::Tokens => "tokens",
            Self::Certs => "certs",
            Self::Cache => "cache",
            Self::System => "system",
        }
    }
}

impl Action {
    /// The serde term for this action (matches `rename_all`).
    pub fn as_str(self) -> &'static str {
        match self {
            Self::Read => "read",
            Self::Write => "write",
            Self::Deploy => "deploy",
            Self::Admin => "admin",
        }
    }
}

impl std::fmt::Display for Resource {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.write_str(self.as_str())
    }
}

impl std::fmt::Display for Action {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.write_str(self.as_str())
    }
}

/// A single grant or requirement: an `action` on a `resource`, optionally scoped
/// to a `target` (a site name for [`Resource::Site`]). A `target` of `None` on a
/// *granted* right is a wildcard ("all targets"); a required right for a site
/// always carries `Some(site)`.
#[derive(Debug, Clone, PartialEq, Eq, Hash, Serialize, Deserialize)]
pub struct Right {
    /// The resource class this right governs.
    pub resource: Resource,
    /// The site name for [`Resource::Site`]; `None` (wildcard/global) otherwise.
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub target: Option<String>,
    /// The permitted action.
    pub action: Action,
}

impl Right {
    /// Construct a right.
    pub fn new(resource: Resource, target: Option<String>, action: Action) -> Self {
        Self {
            resource,
            target,
            action,
        }
    }

    /// The target term: the site name, or `*` for a wildcard/global right.
    pub fn target_term(&self) -> &str {
        self.target.as_deref().unwrap_or("*")
    }

    /// Whether holding `self` (a *granted* right) satisfies a `required` right:
    /// same resource, the granted action matches or is [`Action::Admin`], and the
    /// granted target is a wildcard (`None`/`*`) or equals the required target.
    pub fn satisfies(&self, required: &Self) -> bool {
        self.resource == required.resource
            && (self.action == required.action || self.action == Action::Admin)
            && target_matches(self.target.as_deref(), required.target.as_deref())
    }

    /// Map an HTTP `method` + request `path` to the single right it requires, or
    /// `None` for endpoints not gated by a right (the OIDC→token exchange).
    ///
    /// This is the authoritative request→right table. Unknown
    /// `/api/sites/<s>/…` subpaths fall through to the most restrictive
    /// `system · admin` so a narrow token can never reach an unmapped action.
    pub fn required(method: &str, path: &str) -> Option<Self> {
        let m = method.to_ascii_uppercase();
        let get = m == "GET";

        // Self-service endpoints gated only by holding *some* valid token, not a
        // right: the OIDC→token exchange (carries an IdP JWT) and `whoami`
        // (a principal reading its own identity). The handlers verify the token.
        if path == "/api/auth/exchange" || path == "/api/auth/whoami" {
            return None;
        }

        // Mesh join: the joiner presents a single-use *join
        // token* (verified by the handler), not an admin bearer — so this exact
        // path is unauthenticated at the RBAC layer. Note the `==`: the sibling
        // `/api/cluster/join-token` (minting) stays admin-scoped via the default.
        if path == "/api/cluster/join" {
            return None;
        }

        // First-token bootstrap: the caller presents a single-use, operator-set
        // *bootstrap secret* (verified by the handler), not an admin bearer — so
        // this exact path is unauthenticated at the RBAC layer. Note the `==`: the
        // sibling `/api/tokens` (minting) stays admin-scoped via the default below.
        if path == "/api/tokens/bootstrap" {
            return None;
        }

        // Content blobs are content-addressed (not site-specific); uploading is
        // a deploy-grade action.
        if path.starts_with("/api/blobs/") {
            return Some(Self::new(Resource::Blobs, None, Action::Deploy));
        }

        // Attaching a host **without** an ownership proof (`domain add
        // --unverified`) is an admin-only override: it asserts ownership of an
        // arbitrary hostname, so a site-scoped publisher must never reach it
        // (that would let them claim someone else's domain). Gate it at
        // `system·admin` explicitly, above the per-site branch that would
        // otherwise map it to the site-write right.
        if m == "POST" && path.contains("/domains/") && path.ends_with("/attach-unverified") {
            return Some(Self::new(Resource::System, None, Action::Admin));
        }

        // Project-scoped endpoints: `/api/projects/<proj>/<rest...>` (0.2.0). Parsed
        // through the shared `project_api_path` so this and the request-scoping
        // middleware agree on the tenant segment.
        if let Some((proj, sub)) = project_api_path(path) {
            if proj.is_empty() {
                // `/api/projects/` (trailing slash) or a malformed `//…` — listing.
                return Some(Self::new(Resource::System, None, Action::Read));
            }
            let sub: Vec<&str> = sub.split('/').filter(|s| !s.is_empty()).collect();
            return Some(match sub.split_first() {
                // The project entity itself: read, or manage (admin).
                None => Self::new(
                    Resource::Project,
                    Some(proj.to_string()),
                    if get { Action::Read } else { Action::Admin },
                ),
                // A site within the project: `.../sites/<site>/<site-sub...>`.
                Some((&"sites", tail)) => {
                    let site = tail.first().copied().unwrap_or("");
                    if site.is_empty() {
                        return Some(Self::new(
                            Resource::Project,
                            Some(proj.to_string()),
                            Action::Read,
                        ));
                    }
                    let site_sub: Vec<&str> = tail.iter().skip(1).copied().collect();
                    match site_subpath_action(&m, get, &site_sub) {
                        Some(a) => Self::new(Resource::Site, Some(format!("{proj}/{site}")), a),
                        // Unknown subpath — deny-safe.
                        None => Self::new(Resource::System, None, Action::Admin),
                    }
                }
                // Project-owned resources (functions/compute/workflows/config/…):
                // read with `Project·Read`, mutate with `Project·Deploy`.
                Some(_) => Self::new(
                    Resource::Project,
                    Some(proj.to_string()),
                    if get { Action::Read } else { Action::Deploy },
                ),
            });
        }

        // Legacy per-site endpoints: `/api/sites/<site>/<sub...>`. The site lives in
        // the `default` project post-migration, so the target is project-qualified.
        if let Some(rest) = path.strip_prefix("/api/sites/") {
            let mut segs = rest.split('/');
            let site = segs.next().unwrap_or("");
            if site.is_empty() {
                // `/api/sites/` (trailing slash) — listing.
                return Some(Self::new(Resource::System, None, Action::Read));
            }
            let target = Some(format!("{}/{site}", crate::project::DEFAULT_PROJECT));
            let sub: Vec<&str> = segs.filter(|s| !s.is_empty()).collect();
            let action = site_subpath_action(&m, get, &sub);
            return Some(match action {
                Some(a) => Self::new(Resource::Site, target, a),
                // Unknown subpath — deny-safe.
                None => Self::new(Resource::System, None, Action::Admin),
            });
        }

        // Exact, non-site endpoints.
        let default_project = crate::project::DEFAULT_PROJECT.to_string();
        let right = match path {
            "/api/sites" => Self::new(Resource::System, None, Action::Read),
            // Listing projects is a node-level read; creating one is a node-admin act
            // (only `/api/projects` exactly — a specific project is handled above).
            "/api/projects" => {
                let action = if get { Action::Read } else { Action::Admin };
                Self::new(Resource::System, None, action)
            }
            // Functions (FA-1/FA-2) are **project-owned** (0.2.0): read the view with
            // `project·read`, mutate (deploy a version, alias, rollback, delete) with
            // `project·deploy`, scoped to the default project for the legacy path.
            p if p == "/api/functions" || p.starts_with("/api/functions/") => {
                let action = if get { Action::Read } else { Action::Deploy };
                Self::new(Resource::Project, Some(default_project.clone()), action)
            }
            // Workflows (FA-6) are project-owned too; same shape as `/api/functions`.
            p if p == "/api/workflows" || p.starts_with("/api/workflows/") => {
                let action = if get { Action::Read } else { Action::Deploy };
                Self::new(Resource::Project, Some(default_project.clone()), action)
            }
            // Compute workloads (project-owned): read/deploy within the default project.
            p if p == "/api/compute" || p.starts_with("/api/compute/") => {
                let action = if get { Action::Read } else { Action::Deploy };
                Self::new(Resource::Project, Some(default_project.clone()), action)
            }
            "/api/blobs" => Self::new(Resource::Blobs, None, Action::Deploy),
            "/api/certs" => Self::new(Resource::Certs, None, Action::Read),
            "/api/cache/invalidate" => Self::new(Resource::Cache, None, Action::Write),
            "/api/metrics" => Self::new(Resource::System, None, Action::Read),
            "/api/prune" | "/api/scrub" => Self::new(Resource::System, None, Action::Admin),
            p if p == "/api/tokens" || p.starts_with("/api/tokens/") => {
                Self::new(Resource::Tokens, None, Action::Admin)
            }
            p if p == "/api/authz/policy" || p.starts_with("/api/authz/") => {
                Self::new(Resource::System, None, Action::Admin)
            }
            // Any other `/api/*` path: deny-safe (must hold system·admin).
            _ => Self::new(Resource::System, None, Action::Admin),
        };
        Some(right)
    }
}

/// The action a per-site subpath requires, or `None` if the subpath is unknown.
fn site_subpath_action(method: &str, get: bool, sub: &[&str]) -> Option<Action> {
    match sub.first().copied() {
        // `deployments`, `deployments/<id>`, `deployments/<id>/activate`.
        Some("deployments") => {
            let activate = sub.last() == Some(&"activate");
            if activate || method == "POST" {
                Some(Action::Deploy) // activate, or create a deployment
            } else if get {
                Some(Action::Read)
            } else {
                None
            }
        }
        Some("current") if get => Some(Action::Read),
        Some("config") => {
            if get {
                Some(Action::Read)
            } else if method == "PUT" {
                Some(Action::Write)
            } else {
                None
            }
        }
        // `domains/<host>/verification[/check]`, `domain-verifications`.
        Some("domains") => {
            let check = sub.last() == Some(&"check"); // a status check (POST, but read-grade)
            if get || check {
                Some(Action::Read)
            } else if method == "POST" || method == "DELETE" {
                Some(Action::Write)
            } else {
                None
            }
        }
        Some("domain-verifications") if get => Some(Action::Read),
        Some("aliases") => {
            if get {
                Some(Action::Read)
            } else if method == "PUT" || method == "DELETE" {
                Some(Action::Write)
            } else {
                None
            }
        }
        // `_boatramp/handlers`, `_boatramp/logs` (per-site observability, read);
        // `_boatramp/dlq` purge/redrive is a destructive site-scoped write.
        Some("_boatramp") => {
            if get {
                Some(Action::Read)
            } else if method == "POST" && sub.get(1) == Some(&"dlq") {
                Some(Action::Write)
            } else {
                None
            }
        }
        _ => None,
    }
}

/// The project segment of a `"<project>/<site>"` target (the part before the first
/// `/`), or the whole string when it carries no `/` (a bare project target).
pub fn project_of(target: &str) -> &str {
    target.split_once('/').map_or(target, |(p, _)| p)
}

/// Split an `/api/projects/<proj>/<sub…>` request path into its tenant project
/// segment and the remaining sub-path, or `None` when the path is not
/// project-scoped. `proj` is the first path segment after the prefix (possibly
/// empty for a malformed `//…` or a trailing-slash `/api/projects/`); `sub` is
/// everything after the first `/` (empty for the bare `/api/projects/<proj>` entity
/// path).
///
/// Both the request-scoping middleware (`project_scope::scope_of`) and
/// [`Right::required`] resolve the tenant through this one function, so the two can
/// never disagree on which project a request targets — a confused-deputy hazard if
/// they parsed it differently (each still applies its own policy to an empty
/// segment: the middleware carries the default tenant, `Right::required` treats it
/// as the listing/System right; both fail closed).
pub fn project_api_path(path: &str) -> Option<(&str, &str)> {
    let rest = path.strip_prefix("/api/projects/")?;
    Some(rest.split_once('/').unwrap_or((rest, "")))
}

/// Whether a granted target covers a required target:
/// - `None` — the global wildcard (an untargeted grant), covers everything;
/// - `"<project>/*"` — a project wildcard, covers any `"<project>/<site>"` (the
///   required target's project segment must equal `<project>`);
/// - anything else — an exact string match.
///
/// A grant target of the literal string `"*"` is **not** a global wildcard: the
/// wildcard is the *absence* of a target (`None`), so a `"*"` target matches only
/// a resource literally named `*`. This keeps the pure oracle faithful to the
/// Cedar authorizer, which likewise matches `"*"` as a literal set member — and a
/// resource named `*` cannot be created (`validate_resource_name` rejects it).
fn target_matches(granted: Option<&str>, required: Option<&str>) -> bool {
    match granted {
        None => true,
        Some(g) => match g.strip_suffix("/*") {
            Some(project) => required.is_some_and(|r| project_of(r) == project),
            None => required == Some(g),
        },
    }
}

/// A set of granted [`Right`]s with the pure authorization decision. This is the
/// pure-Rust reference decision: the differential oracle the Cedar authorizer is
/// tested against, and used by issuance code that needs to reason about a role's
/// effective rights.
#[derive(Debug, Clone, Default, PartialEq, Eq)]
pub struct RightSet {
    rights: Vec<Right>,
}

impl RightSet {
    /// An empty set (grants nothing).
    pub fn new() -> Self {
        Self::default()
    }

    /// Add a right (de-duplicated).
    pub fn insert(&mut self, right: Right) {
        if !self.rights.contains(&right) {
            self.rights.push(right);
        }
    }

    /// Whether any held right satisfies `required`.
    pub fn allows(&self, required: &Right) -> bool {
        self.rights.iter().any(|g| g.satisfies(required))
    }

    /// Whether the set grants nothing.
    pub fn is_empty(&self) -> bool {
        self.rights.is_empty()
    }

    /// The held rights.
    pub fn rights(&self) -> &[Right] {
        &self.rights
    }
}

impl FromIterator<Right> for RightSet {
    fn from_iter<I: IntoIterator<Item = Right>>(iter: I) -> Self {
        let mut set = Self::new();
        for r in iter {
            set.insert(r);
        }
        set
    }
}

/// What a target-scoped role's grant target names.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum TargetKind {
    /// A per-site role: target is `"<project>/<site>"`.
    Site,
    /// A per-project role: target is a bare `"<project>"`.
    Project,
}

/// A role granted to a principal: a role `name` from the [`AuthzPolicy`], plus an
/// optional `target` for target-scoped roles — a `"<project>/<site>"` for a site
/// role, or a bare `"<project>"` for a project role.
#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub struct GrantedRole {
    /// The role name (a key in [`AuthzPolicy::roles`]).
    pub name: String,
    /// The site this instance is scoped to, for target-scoped roles.
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub target: Option<String>,
}

impl GrantedRole {
    /// A global role (no target).
    pub fn global(name: impl Into<String>) -> Self {
        Self {
            name: name.into(),
            target: None,
        }
    }

    /// A target-scoped role (e.g. `publisher` on a site).
    pub fn scoped(name: impl Into<String>, target: impl Into<String>) -> Self {
        Self {
            name: name.into(),
            target: Some(target.into()),
        }
    }

    /// Parse a role spec: `"<role>"` (global) or `"<role>:<target>"`
    /// (target-scoped). Used by the CLI `--role`, the API token-create body, and
    /// the OIDC claim→roles mapping, so they agree on the format.
    pub fn parse(spec: &str) -> Self {
        match spec.split_once(':') {
            Some((name, target)) if !target.trim().is_empty() => {
                Self::scoped(name.trim(), target.trim())
            }
            _ => Self::global(spec.trim()),
        }
    }
}

/// How a [`RightTemplate`] derives its target when expanding a role.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
#[serde(rename_all = "snake_case")]
pub enum TargetScope {
    /// Wildcard/global: the expanded right has `target = None`.
    AnyTarget,
    /// Bind to the granted role instance's target verbatim (a site role's
    /// `"<project>/<site>"`, or a project role's `"<project>"`).
    RoleTarget,
    /// A **project role** granting a per-site right over *every* site in its project:
    /// the granted target is a bare project name `"<project>"` and the expanded right
    /// gets the project-wildcard target `"<project>/*"`, which
    /// [`target_matches`](Right::satisfies) treats as covering any `"<project>/<site>"`.
    ProjectWildcard,
}

impl TargetScope {
    /// Whether this scope binds a target (so its role is target-scoped).
    pub fn is_targeted(self) -> bool {
        matches!(self, Self::RoleTarget | Self::ProjectWildcard)
    }
}

/// One right a role grants, before binding to a concrete target.
#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub struct RightTemplate {
    /// The resource the right governs.
    pub resource: Resource,
    /// The action granted.
    pub action: Action,
    /// How the target is derived when the role is expanded.
    pub scope: TargetScope,
}

impl RightTemplate {
    /// A global right template (`AnyTarget`).
    pub fn any(resource: Resource, action: Action) -> Self {
        Self {
            resource,
            action,
            scope: TargetScope::AnyTarget,
        }
    }

    /// A target-scoped right template (`RoleTarget`).
    pub fn scoped(resource: Resource, action: Action) -> Self {
        Self {
            resource,
            action,
            scope: TargetScope::RoleTarget,
        }
    }

    /// A project-wildcard right template (`ProjectWildcard`): a per-site right a
    /// project role confers over every site in the project.
    pub fn project_wildcard(resource: Resource, action: Action) -> Self {
        Self {
            resource,
            action,
            scope: TargetScope::ProjectWildcard,
        }
    }
}

/// The RBAC policy: roles → the rights they grant. Stored at KV `authz/policy`
/// (schema v1); when absent the server uses [`AuthzPolicy::default_policy`].
#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
#[serde(deny_unknown_fields)]
pub struct AuthzPolicy {
    /// Pinned schema discriminant (`v1`).
    #[serde(default = "crate::schema_version")]
    pub version: u32,
    /// Role name → the right templates it grants.
    pub roles: BTreeMap<String, Vec<RightTemplate>>,
}

impl Default for AuthzPolicy {
    fn default() -> Self {
        Self::default_policy()
    }
}

impl AuthzPolicy {
    /// The built-in default policy: `admin`, `publisher`,
    /// `deployer`, `viewer`, `operator`.
    pub fn default_policy() -> Self {
        let mut roles: BTreeMap<String, Vec<RightTemplate>> = BTreeMap::new();

        // admin — every (resource, action). Expanded as one Admin right per
        // resource with a wildcard target.
        roles.insert(
            "admin".to_string(),
            Resource::ALL
                .iter()
                .map(|&r| RightTemplate::any(r, Action::Admin))
                .collect(),
        );

        // publisher (site) — full control of its site + blob uploads.
        roles.insert(
            "publisher".to_string(),
            vec![
                RightTemplate::scoped(Resource::Site, Action::Read),
                RightTemplate::scoped(Resource::Site, Action::Write),
                RightTemplate::scoped(Resource::Site, Action::Deploy),
                RightTemplate::any(Resource::Blobs, Action::Deploy),
            ],
        );

        // deployer (site) — ship + read, but not edit config.
        roles.insert(
            "deployer".to_string(),
            vec![
                RightTemplate::scoped(Resource::Site, Action::Read),
                RightTemplate::scoped(Resource::Site, Action::Deploy),
                RightTemplate::any(Resource::Blobs, Action::Deploy),
            ],
        );

        // viewer (site) — read-only on its site.
        roles.insert(
            "viewer".to_string(),
            vec![RightTemplate::scoped(Resource::Site, Action::Read)],
        );

        // operator — node-level read + cache control, no site access.
        roles.insert(
            "operator".to_string(),
            vec![
                RightTemplate::any(Resource::System, Action::Read),
                RightTemplate::any(Resource::Certs, Action::Read),
                RightTemplate::any(Resource::Cache, Action::Write),
            ],
        );

        // project-admin (project) — full control of the project: its own resources
        // (functions/compute/workflows/config, via `Project·Admin`) AND every site in
        // it (`Site·Admin` over the project wildcard) + blob uploads.
        roles.insert(
            "project_admin".to_string(),
            vec![
                RightTemplate::scoped(Resource::Project, Action::Admin),
                RightTemplate::project_wildcard(Resource::Site, Action::Admin),
                RightTemplate::any(Resource::Blobs, Action::Deploy),
            ],
        );

        // project-publisher (project) — ship + configure any site in the project and
        // manage its functions/compute (write + deploy + read), but not admin the
        // project entity (no membership/role changes).
        roles.insert(
            "project_publisher".to_string(),
            vec![
                RightTemplate::scoped(Resource::Project, Action::Read),
                RightTemplate::scoped(Resource::Project, Action::Write),
                RightTemplate::scoped(Resource::Project, Action::Deploy),
                RightTemplate::project_wildcard(Resource::Site, Action::Read),
                RightTemplate::project_wildcard(Resource::Site, Action::Write),
                RightTemplate::project_wildcard(Resource::Site, Action::Deploy),
                RightTemplate::any(Resource::Blobs, Action::Deploy),
            ],
        );

        // project-viewer (project) — read-only across the whole project.
        roles.insert(
            "project_viewer".to_string(),
            vec![
                RightTemplate::scoped(Resource::Project, Action::Read),
                RightTemplate::project_wildcard(Resource::Site, Action::Read),
            ],
        );

        Self {
            version: crate::SCHEMA_VERSION,
            roles,
        }
    }

    /// Whether `role` is target-scoped (any of its templates binds the target).
    pub fn role_takes_target(&self, role: &str) -> bool {
        self.roles
            .get(role)
            .is_some_and(|ts| ts.iter().any(|t| t.scope.is_targeted()))
    }

    /// What kind of target a role's grant carries: a per-site `"<project>/<site>"`
    /// ([`TargetKind::Site`], a role with a Site `RoleTarget` template) or a bare
    /// `"<project>"` ([`TargetKind::Project`], a role with a `ProjectWildcard` or a
    /// non-Site `RoleTarget` template). `None` for a global role. Used to normalize a
    /// legacy site-only grant to the `default` project ([`normalize_grants`]).
    ///
    /// [`normalize_grants`]: Self::normalize_grants
    pub fn role_target_kind(&self, role: &str) -> Option<TargetKind> {
        let templates = self.roles.get(role)?;
        let mut site = false;
        let mut project = false;
        for t in templates {
            match t.scope {
                TargetScope::RoleTarget if t.resource == Resource::Site => site = true,
                TargetScope::RoleTarget => project = true,
                TargetScope::ProjectWildcard => project = true,
                TargetScope::AnyTarget => {}
            }
        }
        // A Site `RoleTarget` role is per-site; a project role (ProjectWildcard, or a
        // `RoleTarget` on the Project resource) is per-project.
        if site {
            Some(TargetKind::Site)
        } else if project {
            Some(TargetKind::Project)
        } else {
            None
        }
    }

    /// Normalize legacy grants for 0.2.0: a **site** role granted a bare target with
    /// no project segment (a pre-project token, e.g. `publisher:blog`) is read as the
    /// `default` project (`publisher:default/blog`). Project and global roles, and any
    /// already-qualified `"<project>/<site>"` target, pass through unchanged. Run once
    /// at token→roles ingestion, before either [`rights_for`](Self::rights_for) or the
    /// Cedar authorizer, so both decide on the same normalized grants.
    pub fn normalize_grants(&self, roles: &[GrantedRole]) -> Vec<GrantedRole> {
        roles
            .iter()
            .map(|g| match (&g.target, self.role_target_kind(&g.name)) {
                (Some(t), Some(TargetKind::Site)) if !t.contains('/') => {
                    GrantedRole::scoped(&g.name, format!("{}/{t}", crate::project::DEFAULT_PROJECT))
                }
                _ => g.clone(),
            })
            .collect()
    }

    /// Expand a principal's granted roles into the concrete [`RightSet`] they
    /// confer under this policy. A target-scoped template on a role granted
    /// without a target contributes nothing (defensive). This is the pure RBAC
    /// expansion the Cedar authorizer reproduces as a policy set. Callers pass
    /// grants already normalized by [`normalize_grants`](Self::normalize_grants).
    pub fn rights_for(&self, roles: &[GrantedRole]) -> RightSet {
        let mut set = RightSet::new();
        for granted in roles {
            let Some(templates) = self.roles.get(&granted.name) else {
                continue;
            };
            for t in templates {
                let target = match t.scope {
                    TargetScope::AnyTarget => None,
                    TargetScope::RoleTarget => match &granted.target {
                        Some(x) => Some(x.clone()),
                        None => continue,
                    },
                    // A project role's per-site right covers every site in its
                    // project: expand the bare project target to `"<project>/*"`.
                    TargetScope::ProjectWildcard => match &granted.target {
                        Some(x) => Some(format!("{x}/*")),
                        None => continue,
                    },
                };
                set.insert(Right::new(t.resource, target, t.action));
            }
        }
        set
    }
}

/// KV key for the RBAC policy document (`authz/policy`); absent ⇒ the built-in
/// [`AuthzPolicy::default_policy`].
pub const POLICY_KEY: &str = "authz/policy";

/// KV key prefix for revocation markers — presence of `authz/revoked/<id>`
/// means the token with authority revocation id `<id>` (and its attenuations)
/// is revoked.
pub const REVOKED_PREFIX: &str = "authz/revoked/";

/// KV key prefix for issued-token metadata (`authz/tokens/<id>`). The token
/// itself is never stored — only this metadata, for `token ls`.
pub const TOKEN_META_PREFIX: &str = "authz/tokens/";

/// The revocation-marker key for an authority revocation id.
pub fn revoked_key(revocation_id: &str) -> String {
    format!("{REVOKED_PREFIX}{revocation_id}")
}

/// KV key prefix for extra trusted **root anchors** added by `auth rotate-root`
/// (`auth/root/{alg:hex}`). Each is a `TokenPublicKey` trusted alongside the
/// configured primary root during a make-before-break root rotation.
pub const ROOT_ANCHOR_PREFIX: &str = "auth/root/";

/// The root-anchor key trusting `pubkey` (an `alg:hex`-encoded `TokenPublicKey`).
pub fn root_anchor_key(pubkey: &str) -> String {
    format!("{ROOT_ANCHOR_PREFIX}{pubkey}")
}

/// The metadata key for an issued token (keyed by its authority revocation id).
pub fn token_meta_key(id: &str) -> String {
    format!("{TOKEN_META_PREFIX}{id}")
}

/// The single-use marker key for a redeemed first-token bootstrap secret
/// (keyed by the secret's SHA-256 hex).
pub fn bootstrap_key(secret_hash: &str) -> String {
    format!("authz/bootstrap/{secret_hash}")
}

/// Metadata for an issued token (`authz/tokens/<id>`). The token itself is
/// shown once at creation and never stored; this is what `token ls` reports and
/// what `token rm` needs to find the revocation id. Schema v1.
#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub struct TokenMeta {
    /// Pinned schema discriminant (`v1`).
    #[serde(default = "crate::schema_version")]
    pub version: u32,
    /// Human label for the token.
    pub label: String,
    /// The roles the token grants.
    pub roles: Vec<GrantedRole>,
    /// Unix timestamp (seconds) of creation.
    pub created_at: u64,
    /// Unix timestamp (seconds) of expiry, if the token carries a TTL.
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub expires_at: Option<u64>,
    /// The authority revocation id (hex) — also the `authz/tokens/<id>` key and
    /// the argument to `token rm`.
    pub revocation_id: String,
}

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

    #[test]
    fn admin_satisfies_every_action_on_its_resource() {
        let admin_site = Right::new(Resource::Site, None, Action::Admin);
        for action in [Action::Read, Action::Write, Action::Deploy, Action::Admin] {
            let required = Right::new(Resource::Site, Some("blog".into()), action);
            assert!(
                admin_site.satisfies(&required),
                "admin must satisfy {action:?}"
            );
        }
        // …but not a different resource.
        assert!(!admin_site.satisfies(&Right::new(Resource::Tokens, None, Action::Read)));
    }

    #[test]
    fn target_scoping_is_exact_unless_wildcard() {
        let blog = Right::new(Resource::Site, Some("blog".into()), Action::Write);
        assert!(blog.satisfies(&Right::new(
            Resource::Site,
            Some("blog".into()),
            Action::Write
        )));
        assert!(!blog.satisfies(&Right::new(
            Resource::Site,
            Some("api".into()),
            Action::Write
        )));
        // A wildcard grant covers any site.
        let any = Right::new(Resource::Site, None, Action::Write);
        assert!(any.satisfies(&Right::new(
            Resource::Site,
            Some("api".into()),
            Action::Write
        )));
    }

    #[test]
    fn distinct_actions_do_not_imply_each_other() {
        let write = Right::new(Resource::Site, Some("blog".into()), Action::Write);
        let deploy_req = Right::new(Resource::Site, Some("blog".into()), Action::Deploy);
        assert!(
            !write.satisfies(&deploy_req),
            "write must not imply deploy (only admin does)"
        );
    }

    /// Every row of the request→right table.
    #[test]
    fn required_right_table() {
        let cases: &[(&str, &str, Option<Right>)] = &[
            ("POST", "/api/auth/exchange", None),
            ("GET", "/api/auth/whoami", None),
            // Minting a mesh join token is admin-scoped (deny-safe default for
            // `/api/cluster/*`) — an operator issues it.
            (
                "POST",
                "/api/cluster/join-token",
                Some(Right::new(Resource::System, None, Action::Admin)),
            ),
            // Presenting a join token to join is gated by the token itself, not
            // an admin bearer (the handler verifies it) — exact-path `None`.
            ("POST", "/api/cluster/join", None),
            // Rotating this node's mesh key is an operator action → admin-scoped.
            (
                "POST",
                "/api/cluster/rotate-key",
                Some(Right::new(Resource::System, None, Action::Admin)),
            ),
            // Revoking a node from the mesh is an operator action → admin-scoped.
            (
                "POST",
                "/api/cluster/revoke",
                Some(Right::new(Resource::System, None, Action::Admin)),
            ),
            (
                "PUT",
                "/api/blobs/abc123",
                Some(Right::new(Resource::Blobs, None, Action::Deploy)),
            ),
            (
                "GET",
                "/api/sites",
                Some(Right::new(Resource::System, None, Action::Read)),
            ),
            (
                "POST",
                "/api/sites/blog/deployments",
                Some(Right::new(
                    Resource::Site,
                    Some("default/blog".into()),
                    Action::Deploy,
                )),
            ),
            (
                "GET",
                "/api/sites/blog/deployments",
                Some(Right::new(
                    Resource::Site,
                    Some("default/blog".into()),
                    Action::Read,
                )),
            ),
            (
                "GET",
                "/api/sites/blog/deployments/d1",
                Some(Right::new(
                    Resource::Site,
                    Some("default/blog".into()),
                    Action::Read,
                )),
            ),
            (
                "POST",
                "/api/sites/blog/deployments/d1/activate",
                Some(Right::new(
                    Resource::Site,
                    Some("default/blog".into()),
                    Action::Deploy,
                )),
            ),
            (
                "GET",
                "/api/sites/blog/current",
                Some(Right::new(
                    Resource::Site,
                    Some("default/blog".into()),
                    Action::Read,
                )),
            ),
            (
                "GET",
                "/api/sites/blog/config",
                Some(Right::new(
                    Resource::Site,
                    Some("default/blog".into()),
                    Action::Read,
                )),
            ),
            (
                "PUT",
                "/api/sites/blog/config",
                Some(Right::new(
                    Resource::Site,
                    Some("default/blog".into()),
                    Action::Write,
                )),
            ),
            (
                "GET",
                "/api/sites/blog/domains/x.example.com/verification",
                Some(Right::new(
                    Resource::Site,
                    Some("default/blog".into()),
                    Action::Read,
                )),
            ),
            (
                "POST",
                "/api/sites/blog/domains/x.example.com/verification",
                Some(Right::new(
                    Resource::Site,
                    Some("default/blog".into()),
                    Action::Write,
                )),
            ),
            (
                "DELETE",
                "/api/sites/blog/domains/x.example.com/verification",
                Some(Right::new(
                    Resource::Site,
                    Some("default/blog".into()),
                    Action::Write,
                )),
            ),
            (
                "POST",
                "/api/sites/blog/domains/x.example.com/verification/check",
                Some(Right::new(
                    Resource::Site,
                    Some("default/blog".into()),
                    Action::Read,
                )),
            ),
            (
                "GET",
                "/api/sites/blog/domain-verifications",
                Some(Right::new(
                    Resource::Site,
                    Some("default/blog".into()),
                    Action::Read,
                )),
            ),
            (
                "PUT",
                "/api/sites/blog/aliases/www",
                Some(Right::new(
                    Resource::Site,
                    Some("default/blog".into()),
                    Action::Write,
                )),
            ),
            (
                "GET",
                "/api/sites/blog/aliases",
                Some(Right::new(
                    Resource::Site,
                    Some("default/blog".into()),
                    Action::Read,
                )),
            ),
            (
                "GET",
                "/api/sites/blog/_boatramp/handlers",
                Some(Right::new(
                    Resource::Site,
                    Some("default/blog".into()),
                    Action::Read,
                )),
            ),
            (
                "POST",
                "/api/tokens",
                Some(Right::new(Resource::Tokens, None, Action::Admin)),
            ),
            (
                "DELETE",
                "/api/tokens/t1",
                Some(Right::new(Resource::Tokens, None, Action::Admin)),
            ),
            (
                "GET",
                "/api/prune",
                Some(Right::new(Resource::System, None, Action::Admin)),
            ),
            (
                "POST",
                "/api/scrub",
                Some(Right::new(Resource::System, None, Action::Admin)),
            ),
            (
                "GET",
                "/api/certs",
                Some(Right::new(Resource::Certs, None, Action::Read)),
            ),
            (
                "POST",
                "/api/cache/invalidate",
                Some(Right::new(Resource::Cache, None, Action::Write)),
            ),
            (
                "GET",
                "/api/metrics",
                Some(Right::new(Resource::System, None, Action::Read)),
            ),
        ];
        for (method, path, expected) in cases {
            assert_eq!(
                &Right::required(method, path),
                expected,
                "required({method}, {path})"
            );
        }
    }

    #[test]
    fn unknown_site_subpath_is_deny_safe() {
        // An unmapped subpath must require system·admin, not the site's action.
        assert_eq!(
            Right::required("PATCH", "/api/sites/blog/frobnicate"),
            Some(Right::new(Resource::System, None, Action::Admin))
        );
    }

    #[test]
    fn attach_unverified_is_admin_only() {
        // Attaching a host without a proof (`domain add --unverified`) must need
        // system·admin — a site-write right must NOT satisfy it, so a scoped
        // publisher can't claim an arbitrary host.
        let required = Right::required(
            "POST",
            "/api/sites/blog/domains/evil.example.com/attach-unverified",
        )
        .expect("route is gated");
        assert_eq!(required, Right::new(Resource::System, None, Action::Admin));
        // A publisher's site-write right does not satisfy the admin gate.
        let site_write = Right::new(Resource::Site, Some("blog".into()), Action::Write);
        assert!(!site_write.satisfies(&required));
        // A system-admin right does.
        assert!(Right::new(Resource::System, None, Action::Admin).satisfies(&required));
    }

    #[test]
    fn default_policy_publisher_can_deploy_and_write_its_site_only() {
        let policy = AuthzPolicy::default_policy();
        let rights = policy.rights_for(&[GrantedRole::scoped("publisher", "blog")]);
        // Can read/write/deploy blog + upload blobs…
        assert!(rights.allows(&Right::new(
            Resource::Site,
            Some("blog".into()),
            Action::Deploy
        )));
        assert!(rights.allows(&Right::new(
            Resource::Site,
            Some("blog".into()),
            Action::Write
        )));
        assert!(rights.allows(&Right::new(Resource::Blobs, None, Action::Deploy)));
        // …but not another site, nor token management.
        assert!(!rights.allows(&Right::new(
            Resource::Site,
            Some("api".into()),
            Action::Read
        )));
        assert!(!rights.allows(&Right::new(Resource::Tokens, None, Action::Admin)));
    }

    #[test]
    fn default_policy_deployer_cannot_edit_config() {
        let policy = AuthzPolicy::default_policy();
        let rights = policy.rights_for(&[GrantedRole::scoped("deployer", "blog")]);
        assert!(rights.allows(&Right::new(
            Resource::Site,
            Some("blog".into()),
            Action::Deploy
        )));
        assert!(rights.allows(&Right::new(
            Resource::Site,
            Some("blog".into()),
            Action::Read
        )));
        assert!(
            !rights.allows(&Right::new(
                Resource::Site,
                Some("blog".into()),
                Action::Write
            )),
            "deployer must not edit config"
        );
    }

    #[test]
    fn default_policy_admin_can_do_anything() {
        let policy = AuthzPolicy::default_policy();
        let rights = policy.rights_for(&[GrantedRole::global("admin")]);
        for resource in Resource::ALL {
            for action in [Action::Read, Action::Write, Action::Deploy, Action::Admin] {
                let target = matches!(resource, Resource::Site).then(|| "any".to_string());
                assert!(
                    rights.allows(&Right::new(resource, target, action)),
                    "admin must allow {resource:?}·{action:?}"
                );
            }
        }
    }

    #[test]
    fn site_role_without_target_grants_nothing_site_scoped() {
        let policy = AuthzPolicy::default_policy();
        // `publisher` granted globally (no target) — the site templates are
        // RoleTarget, so they contribute nothing; only the AnyTarget blobs right.
        let rights = policy.rights_for(&[GrantedRole::global("publisher")]);
        assert!(rights.allows(&Right::new(Resource::Blobs, None, Action::Deploy)));
        assert!(!rights.allows(&Right::new(
            Resource::Site,
            Some("blog".into()),
            Action::Read
        )));
    }

    #[test]
    fn role_takes_target_classifies_roles() {
        let policy = AuthzPolicy::default_policy();
        assert!(policy.role_takes_target("publisher"));
        assert!(policy.role_takes_target("viewer"));
        assert!(!policy.role_takes_target("admin"));
        assert!(!policy.role_takes_target("operator"));
    }

    #[test]
    fn policy_round_trips_through_json() {
        let policy = AuthzPolicy::default_policy();
        let json = serde_json::to_string(&policy).unwrap();
        let back: AuthzPolicy = serde_json::from_str(&json).unwrap();
        assert_eq!(policy, back);
        assert_eq!(back.version, crate::SCHEMA_VERSION);
    }

    #[test]
    fn unknown_role_is_ignored() {
        let policy = AuthzPolicy::default_policy();
        let rights = policy.rights_for(&[GrantedRole::global("nonesuch")]);
        assert!(rights.is_empty());
    }

    // ---- 0.2.0 project scoping ---------------------------------------------

    #[test]
    fn legacy_site_grant_normalizes_to_default_project() {
        let policy = AuthzPolicy::default_policy();
        // A pre-project token `publisher:blog` reads as the default project.
        let n = policy.normalize_grants(&[GrantedRole::scoped("publisher", "blog")]);
        assert_eq!(n, vec![GrantedRole::scoped("publisher", "default/blog")]);
        // An already-qualified site grant, a project grant, and a global grant pass
        // through untouched (a project name must NOT gain a `default/` prefix).
        let untouched = [
            GrantedRole::scoped("publisher", "acme/blog"),
            GrantedRole::scoped("project_admin", "acme"),
            GrantedRole::global("admin"),
        ];
        assert_eq!(policy.normalize_grants(&untouched), untouched);
    }

    #[test]
    fn project_admin_covers_its_project_but_not_another() {
        let policy = AuthzPolicy::default_policy();
        let rights = policy.rights_for(&[GrantedRole::scoped("project_admin", "acme")]);
        // Every site in acme, at every action.
        for action in [Action::Read, Action::Write, Action::Deploy, Action::Admin] {
            assert!(
                rights.allows(&Right::new(
                    Resource::Site,
                    Some("acme/blog".into()),
                    action
                )),
                "project-admin:acme covers acme/blog·{action:?}"
            );
        }
        // The project's own resources (functions/compute via Project).
        assert!(rights.allows(&Right::new(
            Resource::Project,
            Some("acme".into()),
            Action::Deploy
        )));
        assert!(rights.allows(&Right::new(
            Resource::Project,
            Some("acme".into()),
            Action::Admin
        )));
        // But NOT another project's sites or project resource — the tenant boundary.
        assert!(!rights.allows(&Right::new(
            Resource::Site,
            Some("shop/blog".into()),
            Action::Read
        )));
        assert!(!rights.allows(&Right::new(
            Resource::Project,
            Some("shop".into()),
            Action::Read
        )));
        // A bare/global site target is not covered by a project-scoped grant.
        assert!(!rights.allows(&Right::new(
            Resource::Site,
            Some("blog".into()),
            Action::Read
        )));
    }

    #[test]
    fn project_viewer_is_read_only_across_the_project() {
        let policy = AuthzPolicy::default_policy();
        let rights = policy.rights_for(&[GrantedRole::scoped("project_viewer", "acme")]);
        assert!(rights.allows(&Right::new(
            Resource::Site,
            Some("acme/blog".into()),
            Action::Read
        )));
        assert!(rights.allows(&Right::new(
            Resource::Project,
            Some("acme".into()),
            Action::Read
        )));
        // No writes/deploys anywhere.
        assert!(!rights.allows(&Right::new(
            Resource::Site,
            Some("acme/blog".into()),
            Action::Write
        )));
        assert!(!rights.allows(&Right::new(
            Resource::Project,
            Some("acme".into()),
            Action::Deploy
        )));
    }

    #[test]
    fn project_publisher_ships_but_cannot_admin_the_project() {
        let policy = AuthzPolicy::default_policy();
        let rights = policy.rights_for(&[GrantedRole::scoped("project_publisher", "acme")]);
        assert!(rights.allows(&Right::new(
            Resource::Site,
            Some("acme/blog".into()),
            Action::Deploy
        )));
        assert!(rights.allows(&Right::new(
            Resource::Project,
            Some("acme".into()),
            Action::Deploy
        )));
        assert!(rights.allows(&Right::new(Resource::Blobs, None, Action::Deploy)));
        // Admin of the project entity (membership/roles) is reserved for project-admin.
        assert!(!rights.allows(&Right::new(
            Resource::Project,
            Some("acme".into()),
            Action::Admin
        )));
    }

    #[test]
    fn required_maps_project_paths() {
        // A site within a project.
        assert_eq!(
            Right::required("POST", "/api/projects/acme/sites/blog/deployments"),
            Some(Right::new(
                Resource::Site,
                Some("acme/blog".into()),
                Action::Deploy
            ))
        );
        // A project-owned resource (a function): read vs mutate.
        assert_eq!(
            Right::required("GET", "/api/projects/acme/functions/resize"),
            Some(Right::new(
                Resource::Project,
                Some("acme".into()),
                Action::Read
            ))
        );
        assert_eq!(
            Right::required("POST", "/api/projects/acme/functions/resize/versions"),
            Some(Right::new(
                Resource::Project,
                Some("acme".into()),
                Action::Deploy
            ))
        );
        // The project entity itself.
        assert_eq!(
            Right::required("DELETE", "/api/projects/acme"),
            Some(Right::new(
                Resource::Project,
                Some("acme".into()),
                Action::Admin
            ))
        );
        // Listing/creating projects is node-level.
        assert_eq!(
            Right::required("GET", "/api/projects"),
            Some(Right::new(Resource::System, None, Action::Read))
        );
        assert_eq!(
            Right::required("POST", "/api/projects"),
            Some(Right::new(Resource::System, None, Action::Admin))
        );
        // Legacy top-level functions map to the default project now.
        assert_eq!(
            Right::required("GET", "/api/functions"),
            Some(Right::new(
                Resource::Project,
                Some("default".into()),
                Action::Read
            ))
        );
    }
}