tix-tracker 0.12.0

//! `tix import --target speckit`: mirror a local **GitHub Spec Kit** project
//! onto the tix board.
//!
//! Spec Kit (`specify-cli`) writes its artifacts into the repository: a
//! `.specify/` project root, feature directories under `specs/NNN-<name>/`
//! (`tasks.md` carrying `- [ ] T001 ...` task lines), bug reports under
//! `.specify/bugs/<slug>/`, and idea assessments under
//! `.specify/assessments/<slug>/`. Unlike the `glab`/`linear-cli` targets,
//! there is no remote and no subprocess: everything is local Markdown, so this
//! module reads the tree directly and writes tix issues through the same
//! [`crate::commands::create::create`] core the CLI and MCP use.
//!
//! ## What it creates
//!
//! - One **parent** issue per feature (`specs/NNN-<name>/`) — `files` records
//!   the feature directory.
//! - One **child** issue per `T0xx` task in the feature's `tasks.md`, with
//!   `parent:` set to the feature issue — `files` records
//!   `specs/NNN-<name>/tasks.md#T0xx`.
//! - One issue per bug directory and per assessment directory — `files` records
//!   the directory.
//!
//! Every created issue carries the [`LABEL`] label.
//!
//! ## Idempotency
//!
//! The source artifact path recorded in an issue's `files` field is the
//! identity. Before creating anything this module builds a
//! `source path -> issue number` map from every existing issue (archived ones
//! included), and an artifact whose key already appears is skipped. A second
//! run therefore creates nothing; the per-artifact keys are distinct
//! (`specs/x` for the feature, `specs/x/tasks.md#T001` for a task), so a
//! feature and its tasks never collide on the same key.
//!
//! ## Relationship to `/speckit.taskstoissues`
//!
//! Spec Kit's own `taskstoissues` command targets GitHub only. This is the tix
//! equivalent, and the AGENTS.md section generated by `tix init-agents` points
//! agents at it (see `docs/spec-kit-integration.md`).

use std::collections::BTreeMap;
use std::io::Write;
use std::path::{Path, PathBuf};

use crate::commands::create;
use crate::config::Config;
use crate::error::{Result, TixError};
use crate::model::Status;
use crate::storage::Store;
use crate::triage::import_policy::{self, ImportPolicy};

/// The label every mirrored issue carries, so `tix list` can separate Spec Kit
/// work from the rest of the board.
pub const LABEL: &str = "speckit";

/// One `tasks.md` task line.
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct Task {
    /// The task id, e.g. `T001`.
    pub id: String,
    /// The description after the id and any `[P]` / `[USn]` tags.
    pub description: String,
    /// The original line, stripped of leading/trailing whitespace.
    pub raw: String,
    /// Whether the checkbox was checked (`- [x]`) when the task was read.
    pub done: bool,
}

/// One feature directory under `specs/`.
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct Feature {
    /// Repository-relative directory, e.g. `specs/003-user-auth`.
    pub dir: String,
    /// The directory basename, e.g. `003-user-auth`.
    pub name: String,
    /// Repository-relative `tasks.md`, e.g. `specs/003-user-auth/tasks.md`.
    pub tasks_path: String,
    /// The parsed tasks (empty when the feature has no `tasks.md` yet).
    pub tasks: Vec<Task>,
}

/// A bug or assessment directory mirrored as a single issue.
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct Artifact {
    /// Repository-relative directory, e.g. `.specify/bugs/login-crash`.
    pub dir: String,
    /// The directory basename, e.g. `login-crash`.
    pub slug: String,
    /// The concatenated report Markdown.
    pub body: String,
}

/// Everything `discover` found in one Spec Kit project root.
#[derive(Debug, Clone, Default, PartialEq, Eq)]
pub struct SpecKitArtifacts {
    pub features: Vec<Feature>,
    pub bugs: Vec<Artifact>,
    pub assessments: Vec<Artifact>,
}

/// What one mirror run created and skipped.
#[derive(Debug, Clone, Copy, Default, PartialEq, Eq)]
pub struct MirrorReport {
    /// Parent issues created.
    pub features: usize,
    /// Child task issues created.
    pub tasks: usize,
    /// Bug issues created.
    pub bugs: usize,
    /// Assessment issues created.
    pub assessments: usize,
    /// Artifacts already mirrored (key present on an existing issue).
    pub skipped: usize,
}

impl MirrorReport {
    /// Total issues created across every area.
    #[must_use]
    pub fn created(&self) -> usize {
        self.features + self.tasks + self.bugs + self.assessments
    }

    /// The one-line stdout report.
    #[must_use]
    pub fn summary(&self) -> String {
        format!(
            "imported {} issue(s) from Spec Kit: {} feature(s), {} task(s), {} bug(s), \
             {} assessment(s); {} already mirrored\n",
            self.created(),
            self.features,
            self.tasks,
            self.bugs,
            self.assessments,
            self.skipped
        )
    }
}

/// The stdout report for a mirror run — the single writer for both the CLI
/// (`run`) and the string core (`import_core`), so they cannot drift.
#[must_use]
pub fn report_text(report: &MirrorReport) -> String {
    if report.created() == 0 && report.skipped == 0 {
        "nothing to import\n".to_string()
    } else if report.created() == 0 {
        format!("nothing to import ({} already mirrored)\n", report.skipped)
    } else {
        report.summary()
    }
}

/// Resolve the Spec Kit project root from the current directory: the directory
/// holding `tix.toml`, which is also where `.specify/` lives.
fn resolve_root() -> Result<PathBuf> {
    let cwd = std::env::current_dir()?;
    Config::project_root(&cwd).ok_or_else(|| {
        TixError::InvalidInput(
            "no tix.toml found from the current directory — run `tix import --target speckit` \
             from the project root"
                .to_string(),
        )
    })
}

/// The import core for `--target speckit`: return the stdout report as a
/// `String`, mirroring the remote-import core so the CLI and MCP share it.
pub fn import_core(config: &Config, store: &Store, policy: ImportPolicy) -> Result<String> {
    let root = resolve_root()?;
    let report = mirror(config, store, &root, policy)?;
    Ok(report_text(&report))
}

/// Mirror the Spec Kit project rooted at `root`, writing created issues through
/// `store`. `out` receives the report.
pub fn run(
    config: &Config,
    store: &Store,
    root: &Path,
    policy: ImportPolicy,
    out: &mut dyn Write,
) -> Result<MirrorReport> {
    let report = mirror(config, store, root, policy)?;
    out.write_all(report_text(&report).as_bytes())?;
    Ok(report)
}

/// The mirror core: discover the artifacts and create the missing issues.
pub fn mirror(
    config: &Config,
    store: &Store,
    root: &Path,
    policy: ImportPolicy,
) -> Result<MirrorReport> {
    let artifacts = discover(root)?;

    // The landing column: the import policy decides it exactly as it does for a
    // remote import — the "requested" column is the board's first column, which
    // is where `create` puts a new issue when no status is named.
    let router = import_policy::resolve(config, policy)?;
    let requested = config
        .default_config()
        .columns
        .first()
        .cloned()
        .unwrap_or_else(|| "todo".to_string());
    let landed = router.place(LABEL, &requested).landed;

    // Identity map: every source path already recorded by an issue (archived
    // included) -> that issue's number. Distinct keys per artifact kind keep a
    // feature and its tasks from colliding.
    let mut known: BTreeMap<String, u32> = BTreeMap::new();
    for issue in store.list_all()? {
        for file in &issue.files {
            known.entry(file.clone()).or_insert(issue.number);
        }
    }

    let mut report = MirrorReport::default();

    for feature in &artifacts.features {
        let parent_number = match known.get(&feature.dir).copied() {
            Some(number) => {
                report.skipped += 1;
                number
            }
            None => {
                let body = format!(
                    "Mirrored from Spec Kit feature `{dir}`.\n\nTasks source: `{tasks}`.",
                    dir = feature.dir,
                    tasks = feature.tasks_path,
                );
                let issue = create_mirror(
                    config,
                    store,
                    &feature.name,
                    &body,
                    &landed,
                    &feature.dir,
                    None,
                )?;
                known.insert(feature.dir.clone(), issue.number);
                report.features += 1;
                issue.number
            }
        };

        for task in &feature.tasks {
            let key = format!("{}#{}", feature.tasks_path, task.id);
            if known.contains_key(&key) {
                report.skipped += 1;
                continue;
            }
            let title = if task.description.is_empty() {
                task.id.clone()
            } else {
                format!("{}: {}", task.id, task.description)
            };
            let body = format!(
                "Spec Kit task `{id}` from `{path}`.\n\n```text\n{raw}\n```",
                id = task.id,
                path = feature.tasks_path,
                raw = task.raw,
            );
            let parent = parent_number.to_string();
            let issue = create_mirror(config, store, &title, &body, &landed, &key, Some(&parent))?;
            known.insert(key, issue.number);
            report.tasks += 1;
        }
    }

    for (artifacts, counter) in [
        (&artifacts.bugs, &mut report.bugs),
        (&artifacts.assessments, &mut report.assessments),
    ] {
        for artifact in artifacts {
            if known.contains_key(&artifact.dir) {
                report.skipped += 1;
                continue;
            }
            let title = artifact.slug.clone();
            let issue = create_mirror(
                config,
                store,
                &title,
                &artifact.body,
                &landed,
                &artifact.dir,
                None,
            )?;
            known.insert(artifact.dir.clone(), issue.number);
            *counter += 1;
        }
    }

    Ok(report)
}

/// Create one mirrored issue through the shared create core, so defaults,
/// validation, the entry stamp and the parent History entry are exactly those
/// of `tix create`.
fn create_mirror(
    config: &Config,
    store: &Store,
    title: &str,
    body: &str,
    landed: &str,
    source: &str,
    parent: Option<&str>,
) -> Result<crate::model::Issue> {
    create::create(
        config,
        store,
        title,
        Some(body),
        Some(Status::new(landed.to_string())),
        None,         // priority
        None,         // assignee
        Some(LABEL),  // labels
        Some(source), // files
        None,         // estimate
        None,         // cycles (create applies the default)
        None,         // milestones
        None,         // reviewer
        None,         // start_date
        None,         // due_date
        parent,       // parent
        None,         // related_issues
        None,         // type
    )
}

/// Read a Spec Kit project root into the artifacts to mirror.
pub fn discover(root: &Path) -> Result<SpecKitArtifacts> {
    let specify = root.join(".specify");
    if !specify.is_dir() {
        return Err(TixError::InvalidInput(format!(
            "no `.specify/` directory at {} — `tix import --target speckit` needs a Spec Kit \
             project root",
            root.display()
        )));
    }

    let active = active_feature_dir(root);
    let mut feature_dirs: BTreeMap<String, PathBuf> = BTreeMap::new();
    for (name, path) in subdirs(&root.join("specs"))? {
        let rel = format!("specs/{name}");
        let is_active = active.as_deref() == Some(rel.as_str());
        if path.join("tasks.md").is_file() || is_active {
            feature_dirs.insert(rel, path);
        }
    }
    if let Some(active) = active.as_deref() {
        let path = root.join(active);
        if path.is_dir() {
            feature_dirs.entry(active.to_string()).or_insert(path);
        }
    }

    let mut features = Vec::new();
    for (dir, path) in feature_dirs {
        let name = path
            .file_name()
            .map(|n| n.to_string_lossy().to_string())
            .unwrap_or_else(|| dir.clone());
        let tasks_path = format!("{dir}/tasks.md");
        let tasks = match std::fs::read_to_string(path.join("tasks.md")) {
            Ok(markdown) => parse_tasks(&markdown),
            Err(_) => Vec::new(),
        };
        features.push(Feature {
            dir,
            name,
            tasks_path,
            tasks,
        });
    }

    let bugs = collect_artifacts(&specify, "bugs")?;
    let assessments = collect_artifacts(&specify, "assessments")?;

    Ok(SpecKitArtifacts {
        features,
        bugs,
        assessments,
    })
}

/// Collect every `<base>/<slug>/` directory as one artifact, sorted by slug.
fn collect_artifacts(specify: &Path, base: &str) -> Result<Vec<Artifact>> {
    let mut out = Vec::new();
    for (slug, path) in subdirs(&specify.join(base))? {
        out.push(Artifact {
            dir: format!(".specify/{base}/{slug}"),
            body: read_markdown_dir(&path)?,
            slug,
        });
    }
    Ok(out)
}

/// The active feature directory recorded by `/speckit.specify` in
/// `.specify/feature.json` (`{ "feature_directory": "specs/003-..." }`).
fn active_feature_dir(root: &Path) -> Option<String> {
    let raw = std::fs::read_to_string(root.join(".specify/feature.json")).ok()?;
    let value: serde_json::Value = serde_json::from_str(&raw).ok()?;
    let dir = value
        .get("feature_directory")?
        .as_str()?
        .trim()
        .trim_end_matches('/');
    if dir.is_empty() {
        None
    } else {
        Some(dir.to_string())
    }
}

/// Direct child directories of `dir`, sorted by name, hidden ones skipped.
fn subdirs(dir: &Path) -> Result<Vec<(String, PathBuf)>> {
    let mut out = Vec::new();
    if !dir.is_dir() {
        return Ok(out);
    }
    for entry in std::fs::read_dir(dir)? {
        let entry = entry?;
        if !entry.file_type()?.is_dir() {
            continue;
        }
        let name = entry.file_name().to_string_lossy().to_string();
        if name.starts_with('.') {
            continue;
        }
        out.push((name, entry.path()));
    }
    out.sort_by(|a, b| a.0.cmp(&b.0));
    Ok(out)
}

/// Concatenate the `.md` files of a directory (sorted by name) into one body,
/// each under its filename heading.
fn read_markdown_dir(dir: &Path) -> Result<String> {
    let mut files = Vec::new();
    if dir.is_dir() {
        for entry in std::fs::read_dir(dir)? {
            let path = entry?.path();
            if path.extension().and_then(|e| e.to_str()) == Some("md") {
                files.push(path);
            }
        }
    }
    files.sort();
    let mut out = String::new();
    for path in files {
        let name = path
            .file_name()
            .map(|n| n.to_string_lossy().to_string())
            .unwrap_or_default();
        if !out.is_empty() {
            out.push('\n');
        }
        out.push_str(&format!("## {name}\n\n"));
        out.push_str(&std::fs::read_to_string(&path)?);
        if !out.ends_with('\n') {
            out.push('\n');
        }
    }
    Ok(out)
}

/// Parse the task lines of a `tasks.md`.
///
/// The strict checklist format is `- [ ] T001 [P] [US1] Description` (Spec
/// Kit's task-generation rule). Only lines whose first token after the
/// checkbox is a `T`-numbered id are tasks; prose and headings are ignored.
#[must_use]
pub fn parse_tasks(markdown: &str) -> Vec<Task> {
    let mut tasks = Vec::new();
    for line in markdown.lines() {
        let trimmed = line.trim();
        let (done, rest) = if let Some(rest) = trimmed.strip_prefix("- [ ]") {
            (false, rest)
        } else if let Some(rest) = trimmed
            .strip_prefix("- [x]")
            .or_else(|| trimmed.strip_prefix("- [X]"))
        {
            (true, rest)
        } else {
            continue;
        };
        let rest = rest.trim_start();
        let mut parts = rest.splitn(2, char::is_whitespace);
        let id = parts.next().unwrap_or("");
        if !is_task_id(id) {
            continue;
        }
        let mut description = parts.next().unwrap_or("").trim_start();
        loop {
            let current = description.trim_start();
            if let Some(stripped) = current.strip_prefix("[P]") {
                description = stripped;
            } else if let Some(stripped) = strip_story_tag(current) {
                description = stripped;
            } else {
                description = current;
                break;
            }
        }
        tasks.push(Task {
            id: id.to_string(),
            description: description.trim().to_string(),
            raw: trimmed.to_string(),
            done,
        });
    }
    tasks
}

/// A task id is `T` followed by at least one ASCII digit (`T001`).
fn is_task_id(token: &str) -> bool {
    token.len() >= 2 && token.starts_with('T') && token[1..].bytes().all(|b| b.is_ascii_digit())
}

/// Strip a leading `[USn]` story tag, if present.
fn strip_story_tag(text: &str) -> Option<&str> {
    let text = text.strip_prefix("[US")?;
    let end = text.find(']')?;
    if !text[..end].bytes().all(|b| b.is_ascii_digit()) || end == 0 {
        return None;
    }
    Some(&text[end + 1..])
}

#[cfg(test)]
mod tests {
    #[allow(clippy::wildcard_imports)]
    use super::*;
    use std::fs;
    use tempfile::TempDir;

    #[test]
    fn parse_tasks_reads_the_checklist_format() {
        let md = "\
# Tasks

## Phase 1: Setup

- [ ] T001 Create project structure
- [x] T002 [P] Add dependencies in Cargo.toml
- [ ] T003 [US1] [P] Implement the login form in src/login.rs
- Not a task line
- [ ] no id here
- [X] T004 Done one
";
        let tasks = parse_tasks(md);
        assert_eq!(tasks.len(), 4);
        assert_eq!(tasks[0].id, "T001");
        assert_eq!(tasks[0].description, "Create project structure");
        assert!(!tasks[0].done);
        assert_eq!(tasks[1].id, "T002");
        assert_eq!(tasks[1].description, "Add dependencies in Cargo.toml");
        assert!(tasks[1].done);
        assert_eq!(tasks[2].id, "T003");
        assert_eq!(
            tasks[2].description,
            "Implement the login form in src/login.rs"
        );
        assert_eq!(tasks[3].id, "T004");
        assert!(tasks[3].done);
    }

    #[test]
    fn discover_reads_features_bugs_and_assessments() {
        let tmp = TempDir::new().unwrap();
        let root = tmp.path();
        fs::create_dir_all(root.join(".specify/memory")).unwrap();
        fs::write(
            root.join(".specify/feature.json"),
            r#"{ "feature_directory": "specs/004-empty" }"#,
        )
        .unwrap();
        // Feature with tasks.
        fs::create_dir_all(root.join("specs/003-user-auth")).unwrap();
        fs::write(
            root.join("specs/003-user-auth/tasks.md"),
            "- [ ] T001 Do the thing\n- [ ] T002 [P] Do another\n",
        )
        .unwrap();
        // Active-only feature with no tasks.md yet.
        fs::create_dir_all(root.join("specs/004-empty")).unwrap();
        fs::write(root.join("specs/004-empty/spec.md"), "# spec\n").unwrap();
        // A non-feature dir that must be ignored.
        fs::create_dir_all(root.join("specs/notes")).unwrap();
        // Bug + assessment.
        fs::create_dir_all(root.join(".specify/bugs/login-crash")).unwrap();
        fs::write(
            root.join(".specify/bugs/login-crash/assess.md"),
            "## Assessment\n\nboom\n",
        )
        .unwrap();
        fs::create_dir_all(root.join(".specify/assessments/offline-mode")).unwrap();
        fs::write(
            root.join(".specify/assessments/offline-mode/decide.md"),
            "go\n",
        )
        .unwrap();

        let artifacts = discover(root).unwrap();
        let names: Vec<&str> = artifacts.features.iter().map(|f| f.dir.as_str()).collect();
        // 004 is the active feature but has no tasks.md; 003 has tasks; notes is ignored.
        assert!(names.contains(&"specs/003-user-auth"));
        assert!(names.contains(&"specs/004-empty"));
        assert!(!names.contains(&"specs/notes"));
        let feature = artifacts
            .features
            .iter()
            .find(|f| f.dir == "specs/003-user-auth")
            .unwrap();
        assert_eq!(feature.tasks.len(), 2);
        assert_eq!(feature.tasks_path, "specs/003-user-auth/tasks.md");
        assert_eq!(artifacts.bugs.len(), 1);
        assert_eq!(artifacts.bugs[0].dir, ".specify/bugs/login-crash");
        assert!(artifacts.bugs[0].body.contains("## assess.md"));
        assert!(artifacts.bugs[0].body.contains("boom"));
        assert_eq!(artifacts.assessments.len(), 1);
        assert_eq!(artifacts.assessments[0].slug, "offline-mode");
    }

    #[test]
    fn discover_without_specify_is_an_invalid_input_error() {
        let tmp = TempDir::new().unwrap();
        let err = discover(tmp.path()).unwrap_err();
        assert!(matches!(err, TixError::InvalidInput(_)), "{err}");
        assert!(err.to_string().contains(".specify/"));
    }
}