tix-tracker 0.3.0

//! GitLab adapter: shells out to the `glab` CLI under
//! `contracts/external-tools.md` (GitLab row). Every contract fabricate
//! template's command shape is reproduced; the only additions are `--output
//! json` (needed to parse the create/list responses) and the token env
//! injection.
//!
//! Tokens are env-only and scrubbed as `<token>` from any surfaced output.

use serde::Deserialize;

use crate::error::{Result, TixError};
use crate::sync::{CommandOutcome, CommandRunner, RemoteIssue, Tool, TrackerAdapter, scrub_secret};

/// The `glab` adapter. Spawns `glab issue <create|update|close|list>` with
/// the configured project and, when a secret is configured, the
/// `GITLAB_TOKEN` env pair.
pub struct GitLabAdapter {
    runner: Box<dyn CommandRunner>,
    token: Option<String>,
    base_url: Option<String>,
    project: String,
}

impl GitLabAdapter {
    pub fn new(
        runner: impl CommandRunner + 'static,
        token: Option<String>,
        base_url: Option<String>,
        project: String,
    ) -> Self {
        GitLabAdapter {
            runner: Box::new(runner),
            token,
            base_url,
            project,
        }
    }

    fn project_arg(&self) -> (String, String) {
        ("--project".to_string(), self.project.clone())
    }

    fn hostname_args(&self) -> Vec<String> {
        match &self.base_url {
            Some(url) => vec!["--hostname".to_string(), url.clone()],
            None => Vec::new(),
        }
    }

    /// Environment injected into every child: the token env pair when a
    /// secret is configured (native glab auth otherwise — no env at all).
    fn child_env(&self) -> Vec<(String, String)> {
        match &self.token {
            Some(token) => vec![("GITLAB_TOKEN".to_string(), token.clone())],
            None => Vec::new(),
        }
    }

    fn run(&self, args: &[String]) -> Result<CommandOutcome> {
        self.runner
            .run(Tool::GitLab.binary(), args, &self.child_env())
    }

    /// Build a [`TixError::External`] for a failed tool invocation, scrubbing
    /// the token from any surfaced output.
    fn external(&self, context: &str, outcome: &CommandOutcome) -> TixError {
        let mut message = format!("{context}: {}", outcome.text().trim());
        if let Some(secret) = &self.token {
            message = scrub_secret(&message, secret);
        }
        TixError::External(message)
    }

    /// Parse `glab issue create` stdout as `{"iid": n}`.
    fn parse_iid(&self, outcome: &CommandOutcome) -> Result<String> {
        let stdout = &outcome.stdout;
        serde_json::from_str::<serde_json::Value>(stdout)
            .ok()
            .and_then(|value| {
                value
                    .get("iid")
                    .and_then(serde_json::Value::as_i64)
                    .map(|iid| iid.to_string())
            })
            .ok_or_else(|| {
                TixError::External(format!(
                    "`glab issue create` did not return JSON with a numeric `iid` field (expected {{\"iid\":…}}): {}",
                    scrub_secret(stdout.trim(), self.token.as_deref().unwrap_or(""))
                ))
            })
    }
}

impl TrackerAdapter for GitLabAdapter {
    fn tool(&self) -> Tool {
        Tool::GitLab
    }

    fn create_issue(
        &mut self,
        title: &str,
        body: &str,
        labels: &[String],
        assignee: Option<&str>,
        _priority: Option<&str>,
        _status: &str,
    ) -> Result<String> {
        let mut args: Vec<String> = Vec::new();
        args.push("issue".to_string());
        args.push("create".to_string());
        let (k, v) = self.project_arg();
        args.push(k);
        args.push(v);
        args.extend(self.hostname_args());
        args.push("--title".to_string());
        args.push(title.to_string());
        args.push("--description".to_string());
        args.push(body.to_string());
        if !labels.is_empty() {
            args.push("--label".to_string());
            args.push(labels.join(","));
        }
        if let Some(name) = assignee {
            args.push("--assignee".to_string());
            args.push(format!("@{name}"));
        }
        args.push("--yes".to_string());
        args.push("--output".to_string());
        args.push("json".to_string());
        let outcome = self.run(&args)?;
        if !outcome.success {
            return Err(self.external("`glab issue create` failed", &outcome));
        }
        self.parse_iid(&outcome)
    }

    fn update_issue(
        &mut self,
        remote_ref: &str,
        title: &str,
        body: &str,
        labels: &[String],
        assignee: Option<&str>,
        _priority: Option<&str>,
        _status: &str,
    ) -> Result<()> {
        let mut args: Vec<String> = Vec::new();
        args.push("issue".to_string());
        args.push("update".to_string());
        args.push(remote_ref.to_string());
        let (k, v) = self.project_arg();
        args.push(k);
        args.push(v);
        args.extend(self.hostname_args());
        args.push("--title".to_string());
        args.push(title.to_string());
        args.push("--description".to_string());
        args.push(body.to_string());
        if !labels.is_empty() {
            args.push("--label".to_string());
            args.push(labels.join(","));
        }
        if let Some(name) = assignee {
            args.push("--assignee".to_string());
            args.push(format!("@{name}"));
        }
        let outcome = self.run(&args)?;
        if !outcome.success {
            return Err(self.external("`glab issue update` failed", &outcome));
        }
        Ok(())
    }

    fn mark_done(&mut self, remote_ref: &str) -> Result<()> {
        let mut args: Vec<String> = Vec::new();
        args.push("issue".to_string());
        args.push("close".to_string());
        args.push(remote_ref.to_string());
        let (k, v) = self.project_arg();
        args.push(k);
        args.push(v);
        args.extend(self.hostname_args());
        let outcome = self.run(&args)?;
        if !outcome.success {
            return Err(self.external("`glab issue close` failed", &outcome));
        }
        Ok(())
    }

    fn list_open(&mut self) -> Result<Vec<RemoteIssue>> {
        let mut args: Vec<String> = Vec::new();
        args.push("issue".to_string());
        args.push("list".to_string());
        let (k, v) = self.project_arg();
        args.push(k);
        args.push(v);
        args.extend(self.hostname_args());
        args.push("--output".to_string());
        args.push("json".to_string());
        let outcome = self.run(&args)?;
        if !outcome.success {
            return Err(self.external("`glab issue list` failed", &outcome));
        }
        let issues: Vec<GlabIssue> = serde_json::from_str(&outcome.stdout).map_err(|e| {
            TixError::External(format!(
                "`glab issue list` did not return a JSON array: {e}\n{}",
                scrub_secret(&outcome.stdout, self.token.as_deref().unwrap_or(""))
            ))
        })?;
        Ok(issues
            .into_iter()
            .map(RemoteIssue::from)
            .filter(|i| i.state != "closed")
            .collect())
    }

    fn done_via_status(&self) -> bool {
        false
    }
}

/// A single entry from `glab issue list --output json`.
#[derive(Debug, Deserialize)]
struct GlabIssue {
    iid: i64,
    #[serde(default)]
    title: String,
    #[serde(default)]
    description: Option<String>,
    #[serde(default)]
    labels: Vec<GlabLabel>,
    #[serde(default)]
    state: String,
    #[serde(default)]
    updated_at: Option<String>,
    #[serde(default)]
    assignees: Vec<GlabAssignee>,
}

/// Labels arrive either as plain strings or as `{"id":..,"name":".."}`.
#[derive(Debug, Deserialize)]
#[serde(untagged)]
enum GlabLabel {
    Name(String),
    Named { name: String },
}

#[derive(Debug, Deserialize)]
struct GlabAssignee {
    #[serde(default)]
    username: String,
}

impl From<GlabIssue> for RemoteIssue {
    fn from(issue: GlabIssue) -> Self {
        RemoteIssue {
            id: issue.iid.to_string(),
            title: issue.title,
            description: issue.description.unwrap_or_default(),
            labels: issue
                .labels
                .into_iter()
                .map(|l| match l {
                    GlabLabel::Name(name) | GlabLabel::Named { name } => name,
                })
                .collect(),
            state: issue.state,
            updated_at: issue.updated_at,
            assignee: issue
                .assignees
                .into_iter()
                .next()
                .map(|a| a.username)
                .filter(|u| !u.is_empty()),
        }
    }
}

/// A recorded adapter call: the argv plus the env pairs it was spawned with.
pub type RecordedCall = (Vec<String>, Vec<(String, String)>);

/// A fake runner for adapter unit tests: records argv plus env (for the
/// token scrub/injection assertions) and returns configured outcomes in
/// order, falling back to an empty success.
#[derive(Default)]
pub struct FakeRunner {
    calls: std::sync::Mutex<Vec<RecordedCall>>,
    responses: std::sync::Mutex<Vec<CommandOutcome>>,
}

impl FakeRunner {
    #[must_use]
    pub fn new(responses: Vec<CommandOutcome>) -> Self {
        FakeRunner {
            responses: std::sync::Mutex::new(responses),
            ..FakeRunner::default()
        }
    }

    pub fn take_calls(&self) -> Vec<RecordedCall> {
        self.calls.lock().unwrap().clone()
    }
}

impl CommandRunner for FakeRunner {
    fn run(
        &self,
        program: &str,
        args: &[String],
        env: &[(String, String)],
    ) -> Result<CommandOutcome> {
        self.calls.lock().unwrap().push((
            std::iter::once(program.to_string())
                .chain(args.iter().cloned())
                .collect(),
            env.to_vec(),
        ));
        let outcome = self
            .responses
            .lock()
            .unwrap()
            .pop()
            .unwrap_or(CommandOutcome {
                success: true,
                status: Some(0),
                stdout: String::new(),
                stderr: String::new(),
            });
        Ok(outcome)
    }

    fn as_any(&self) -> &dyn std::any::Any {
        self
    }
}

/// Response helpers shaped like `glab` JSON output.
impl CommandOutcome {
    #[must_use]
    pub fn glab_created(iid: i64) -> CommandOutcome {
        CommandOutcome {
            success: true,
            status: Some(0),
            stdout: format!(
                "{{\"iid\": {iid}, \"web_url\": \"https://gitlab.example/acme/tix/-/issues/{iid}\"}}"
            ),
            stderr: String::new(),
        }
    }

    #[must_use]
    pub fn glab_list(payload: &str) -> CommandOutcome {
        CommandOutcome {
            success: true,
            status: Some(0),
            stdout: payload.to_string(),
            stderr: String::new(),
        }
    }
}

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

    fn adapter_with(
        runner: FakeRunner,
        token: Option<&str>,
        base_url: Option<&str>,
    ) -> GitLabAdapter {
        GitLabAdapter::new(
            runner,
            token.map(String::from),
            base_url.map(String::from),
            "acme/tix".into(),
        )
    }

    /// Read the recorded calls through the owned runner's downcast hook.
    fn recorded(adapter: &GitLabAdapter) -> Vec<RecordedCall> {
        adapter
            .runner
            .as_any()
            .downcast_ref::<FakeRunner>()
            .expect("adapter must hold a FakeRunner")
            .take_calls()
    }

    #[test]
    fn create_records_env_token_and_full_shape() {
        let runner = FakeRunner::new(vec![CommandOutcome::glab_created(42)]);
        let mut adapter = adapter_with(runner, Some("gl-token"), None);
        let id = adapter
            .create_issue(
                "Fix login",
                "body here",
                &["bug".into(), "auth".into()],
                Some("alice"),
                None,
                "opened",
            )
            .unwrap();
        assert_eq!(id, "42");
        let calls = recorded(&adapter);
        let (argv, env) = &calls[0];
        assert_eq!(argv[0], "glab");
        assert_eq!(argv[1], "issue");
        assert_eq!(argv[2], "create");
        let joined = argv.join(" ");
        assert!(joined.contains("--project acme/tix"));
        assert!(joined.contains("--title Fix login"));
        assert!(joined.contains("--description body here"));
        assert!(joined.contains("--label bug,auth"));
        assert!(joined.contains("--assignee @alice"));
        assert!(joined.contains("--yes"));
        assert!(joined.contains("--output json"));
        assert_eq!(env, &[("GITLAB_TOKEN".to_string(), "gl-token".to_string())]);
    }

    #[test]
    fn create_with_hostname_includes_hostname_flag() {
        let runner = FakeRunner::new(vec![CommandOutcome::glab_created(7)]);
        let mut adapter = adapter_with(runner, None, Some("gitlab.example.com"));
        adapter
            .create_issue("T", "b", &[], None, None, "opened")
            .unwrap();
        let joined = recorded(&adapter)[0].0.join(" ");
        assert!(joined.contains("--hostname gitlab.example.com"));
    }

    #[test]
    fn create_json_without_iid_is_a_parse_error() {
        let runner = FakeRunner::new(vec![CommandOutcome::glab_list("{}")]);
        let mut adapter = adapter_with(runner, None, None);
        let err = adapter
            .create_issue("T", "b", &[], None, None, "opened")
            .unwrap_err();
        assert!(matches!(err, TixError::External(_)));
        assert!(err.to_string().contains("iid"));
    }

    #[test]
    fn update_uses_iid_position_and_project() {
        let runner = FakeRunner::new(vec![]);
        let mut adapter = adapter_with(runner, None, None);
        adapter
            .update_issue("777", "New title", "new body", &[], None, None, "opened")
            .unwrap();
        let argv = &recorded(&adapter)[0].0;
        let joined = argv.join(" ");
        assert!(joined.starts_with("glab issue update 777 "));
        assert!(joined.contains("--project acme/tix"));
        assert!(joined.contains("--title New title"));
        assert!(joined.contains("--description new body"));
    }

    #[test]
    fn mark_done_calls_close() {
        let runner = FakeRunner::new(vec![]);
        let mut adapter = adapter_with(runner, None, None);
        adapter.mark_done("777").unwrap();
        let argv = &recorded(&adapter)[0].0;
        assert_eq!(
            argv,
            &["glab", "issue", "close", "777", "--project", "acme/tix"]
        );
    }

    #[test]
    fn list_open_parses_json_and_filters_closed() {
        let payload = r#"[
          {"iid":1,"title":"T1","description":"d1","labels":[{"name":"bug"}],"state":"opened","updated_at":"2026-05-11T10:00:00Z","assignees":[{"username":"alice"}]},
          {"iid":2,"title":"T2","state":"closed"}
        ]"#;
        let runner = FakeRunner::new(vec![CommandOutcome::glab_list(payload)]);
        let mut adapter = adapter_with(runner, None, None);
        let issues = adapter.list_open().unwrap();
        assert_eq!(issues.len(), 1);
        assert_eq!(issues[0].id, "1");
        assert_eq!(issues[0].title, "T1");
        assert_eq!(issues[0].labels, ["bug"]);
        assert_eq!(issues[0].state, "opened");
        assert_eq!(
            issues[0].updated_at.as_deref(),
            Some("2026-05-11T10:00:00Z")
        );
        assert_eq!(issues[0].assignee.as_deref(), Some("alice"));
    }

    #[test]
    fn list_accepts_string_labels_too() {
        let runner = FakeRunner::new(vec![CommandOutcome::glab_list(
            r#"[{"iid":9,"title":"T","labels":["docs","ops"],"state":"opened"}]"#,
        )]);
        let mut adapter = adapter_with(runner, None, None);
        let issues = adapter.list_open().unwrap();
        assert_eq!(issues[0].labels, ["docs", "ops"]);
    }

    #[test]
    fn failure_message_scrubs_token_from_tool_output() {
        let runner = FakeRunner::new(vec![CommandOutcome {
            success: false,
            status: Some(1),
            stdout: String::new(),
            stderr: "GITLAB_TOKEN=gl-token leaked".into(),
        }]);
        let mut adapter = adapter_with(runner, Some("gl-token"), None);
        let err = adapter
            .create_issue("T", "b", &[], None, None, "opened")
            .unwrap_err();
        let text = err.to_string();
        assert!(text.contains("<token>"), "expected redaction, got: {text}");
        assert!(!text.contains("gl-token"), "secret leaked: {text}");
    }
}