/**
 * GSD Tools Tests - Init
 */

const { test, describe, beforeEach, afterEach } = require('node:test');
const assert = require('node:assert');
const fs = require('fs');
const path = require('path');
const { runGsdTools, createTempProject, cleanup } = require('./helpers.cjs');

describe('init commands', () => {
  let tmpDir;

  beforeEach(() => {
    tmpDir = createTempProject();
  });

  afterEach(() => {
    cleanup(tmpDir);
  });

  test('init execute-phase returns file paths', () => {
    const phaseDir = path.join(tmpDir, '.planning', 'phases', '03-api');
    fs.mkdirSync(phaseDir, { recursive: true });
    fs.writeFileSync(path.join(phaseDir, '03-01-PLAN.md'), '# Plan');

    const result = runGsdTools('init execute-phase 03', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.state_path, '.planning/STATE.md');
    assert.strictEqual(output.roadmap_path, '.planning/ROADMAP.md');
    assert.strictEqual(output.config_path, '.planning/config.json');
  });

  test('init plan-phase returns file paths', () => {
    const phaseDir = path.join(tmpDir, '.planning', 'phases', '03-api');
    fs.mkdirSync(phaseDir, { recursive: true });
    fs.writeFileSync(path.join(phaseDir, '03-CONTEXT.md'), '# Phase Context');
    fs.writeFileSync(path.join(phaseDir, '03-RESEARCH.md'), '# Research Findings');
    fs.writeFileSync(path.join(phaseDir, '03-VERIFICATION.md'), '# Verification');
    fs.writeFileSync(path.join(phaseDir, '03-UAT.md'), '# UAT');

    const result = runGsdTools('init plan-phase 03', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.state_path, '.planning/STATE.md');
    assert.strictEqual(output.roadmap_path, '.planning/ROADMAP.md');
    assert.strictEqual(output.requirements_path, '.planning/REQUIREMENTS.md');
    assert.strictEqual(output.context_path, '.planning/phases/03-api/03-CONTEXT.md');
    assert.strictEqual(output.research_path, '.planning/phases/03-api/03-RESEARCH.md');
    assert.strictEqual(output.verification_path, '.planning/phases/03-api/03-VERIFICATION.md');
    assert.strictEqual(output.uat_path, '.planning/phases/03-api/03-UAT.md');
  });

  test('init progress returns file paths', () => {
    const result = runGsdTools('init progress', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.state_path, '.planning/STATE.md');
    assert.strictEqual(output.roadmap_path, '.planning/ROADMAP.md');
    assert.strictEqual(output.project_path, '.planning/PROJECT.md');
    assert.strictEqual(output.config_path, '.planning/config.json');
  });

  test('init phase-op returns core and optional phase file paths', () => {
    const phaseDir = path.join(tmpDir, '.planning', 'phases', '03-api');
    fs.mkdirSync(phaseDir, { recursive: true });
    fs.writeFileSync(path.join(phaseDir, '03-CONTEXT.md'), '# Phase Context');
    fs.writeFileSync(path.join(phaseDir, '03-RESEARCH.md'), '# Research');
    fs.writeFileSync(path.join(phaseDir, '03-VERIFICATION.md'), '# Verification');
    fs.writeFileSync(path.join(phaseDir, '03-UAT.md'), '# UAT');

    const result = runGsdTools('init phase-op 03', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.state_path, '.planning/STATE.md');
    assert.strictEqual(output.roadmap_path, '.planning/ROADMAP.md');
    assert.strictEqual(output.requirements_path, '.planning/REQUIREMENTS.md');
    assert.strictEqual(output.context_path, '.planning/phases/03-api/03-CONTEXT.md');
    assert.strictEqual(output.research_path, '.planning/phases/03-api/03-RESEARCH.md');
    assert.strictEqual(output.verification_path, '.planning/phases/03-api/03-VERIFICATION.md');
    assert.strictEqual(output.uat_path, '.planning/phases/03-api/03-UAT.md');
  });

  test('init plan-phase omits optional paths if files missing', () => {
    const phaseDir = path.join(tmpDir, '.planning', 'phases', '03-api');
    fs.mkdirSync(phaseDir, { recursive: true });

    const result = runGsdTools('init plan-phase 03', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.context_path, undefined);
    assert.strictEqual(output.research_path, undefined);
  });

  // ── phase_req_ids extraction (fix for #684) ──────────────────────────────

  test('init plan-phase extracts phase_req_ids from ROADMAP', () => {
    fs.mkdirSync(path.join(tmpDir, '.planning', 'phases', '03-api'), { recursive: true });
    fs.writeFileSync(
      path.join(tmpDir, '.planning', 'ROADMAP.md'),
      `# Roadmap\n\n### Phase 3: API\n**Goal:** Build API\n**Requirements**: CP-01, CP-02, CP-03\n**Plans:** 0 plans\n`
    );

    const result = runGsdTools('init plan-phase 3', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.phase_req_ids, 'CP-01, CP-02, CP-03');
  });

  test('init plan-phase strips brackets from phase_req_ids', () => {
    fs.mkdirSync(path.join(tmpDir, '.planning', 'phases', '03-api'), { recursive: true });
    fs.writeFileSync(
      path.join(tmpDir, '.planning', 'ROADMAP.md'),
      `# Roadmap\n\n### Phase 3: API\n**Goal:** Build API\n**Requirements**: [CP-01, CP-02]\n**Plans:** 0 plans\n`
    );

    const result = runGsdTools('init plan-phase 3', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.phase_req_ids, 'CP-01, CP-02');
  });

  test('init plan-phase returns null phase_req_ids when Requirements line is absent', () => {
    fs.mkdirSync(path.join(tmpDir, '.planning', 'phases', '03-api'), { recursive: true });
    fs.writeFileSync(
      path.join(tmpDir, '.planning', 'ROADMAP.md'),
      `# Roadmap\n\n### Phase 3: API\n**Goal:** Build API\n**Plans:** 0 plans\n`
    );

    const result = runGsdTools('init plan-phase 3', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.phase_req_ids, null);
  });

  test('init plan-phase returns null phase_req_ids when ROADMAP is absent', () => {
    fs.mkdirSync(path.join(tmpDir, '.planning', 'phases', '03-api'), { recursive: true });

    const result = runGsdTools('init plan-phase 3', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.phase_req_ids, null);
  });

  test('init execute-phase extracts phase_req_ids from ROADMAP', () => {
    const phaseDir = path.join(tmpDir, '.planning', 'phases', '03-api');
    fs.mkdirSync(phaseDir, { recursive: true });
    fs.writeFileSync(path.join(phaseDir, '03-01-PLAN.md'), '# Plan');
    fs.writeFileSync(
      path.join(tmpDir, '.planning', 'ROADMAP.md'),
      `# Roadmap\n\n### Phase 3: API\n**Goal:** Build API\n**Requirements**: EX-01, EX-02\n**Plans:** 1 plans\n`
    );

    const result = runGsdTools('init execute-phase 3', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.phase_req_ids, 'EX-01, EX-02');
  });

  test('init plan-phase returns null phase_req_ids when value is TBD', () => {
    fs.mkdirSync(path.join(tmpDir, '.planning', 'phases', '03-api'), { recursive: true });
    fs.writeFileSync(
      path.join(tmpDir, '.planning', 'ROADMAP.md'),
      `# Roadmap\n\n### Phase 3: API\n**Goal:** Build API\n**Requirements**: TBD\n**Plans:** 0 plans\n`
    );

    const result = runGsdTools('init plan-phase 3', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.phase_req_ids, null, 'TBD placeholder should return null');
  });

  test('init execute-phase returns null phase_req_ids when Requirements line is absent', () => {
    const phaseDir = path.join(tmpDir, '.planning', 'phases', '03-api');
    fs.mkdirSync(phaseDir, { recursive: true });
    fs.writeFileSync(path.join(phaseDir, '03-01-PLAN.md'), '# Plan');
    fs.writeFileSync(
      path.join(tmpDir, '.planning', 'ROADMAP.md'),
      `# Roadmap\n\n### Phase 3: API\n**Goal:** Build API\n**Plans:** 1 plans\n`
    );

    const result = runGsdTools('init execute-phase 3', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.phase_req_ids, null);
  });
});

// ─────────────────────────────────────────────────────────────────────────────
// cmdInitTodos (INIT-01)
// ─────────────────────────────────────────────────────────────────────────────

describe('cmdInitTodos', () => {
  let tmpDir;

  beforeEach(() => {
    tmpDir = createTempProject();
  });

  afterEach(() => {
    cleanup(tmpDir);
  });

  test('empty pending dir returns zero count', () => {
    fs.mkdirSync(path.join(tmpDir, '.planning', 'todos', 'pending'), { recursive: true });

    const result = runGsdTools('init todos', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.todo_count, 0);
    assert.deepStrictEqual(output.todos, []);
    assert.strictEqual(output.pending_dir_exists, true);
  });

  test('missing pending dir returns zero count', () => {
    const result = runGsdTools('init todos', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.todo_count, 0);
    assert.deepStrictEqual(output.todos, []);
    assert.strictEqual(output.pending_dir_exists, false);
  });

  test('multiple todos with fields are read correctly', () => {
    const pendingDir = path.join(tmpDir, '.planning', 'todos', 'pending');
    fs.mkdirSync(pendingDir, { recursive: true });

    fs.writeFileSync(path.join(pendingDir, 'task-1.md'), 'title: Fix bug\narea: backend\ncreated: 2026-02-25');
    fs.writeFileSync(path.join(pendingDir, 'task-2.md'), 'title: Add feature\narea: frontend\ncreated: 2026-02-24');
    fs.writeFileSync(path.join(pendingDir, 'task-3.md'), 'title: Write docs\narea: backend\ncreated: 2026-02-23');

    const result = runGsdTools('init todos', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.todo_count, 3);
    assert.strictEqual(output.todos.length, 3);

    const task1 = output.todos.find(t => t.file === 'task-1.md');
    assert.ok(task1, 'task-1.md should be in todos');
    assert.strictEqual(task1.title, 'Fix bug');
    assert.strictEqual(task1.area, 'backend');
    assert.strictEqual(task1.created, '2026-02-25');
    assert.strictEqual(task1.path, path.join('.planning', 'todos', 'pending', 'task-1.md'));
  });

  test('area filter returns only matching todos', () => {
    const pendingDir = path.join(tmpDir, '.planning', 'todos', 'pending');
    fs.mkdirSync(pendingDir, { recursive: true });

    fs.writeFileSync(path.join(pendingDir, 'task-1.md'), 'title: Fix bug\narea: backend\ncreated: 2026-02-25');
    fs.writeFileSync(path.join(pendingDir, 'task-2.md'), 'title: Add feature\narea: frontend\ncreated: 2026-02-24');
    fs.writeFileSync(path.join(pendingDir, 'task-3.md'), 'title: Write docs\narea: backend\ncreated: 2026-02-23');

    const result = runGsdTools('init todos backend', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.todo_count, 2);
    assert.strictEqual(output.area_filter, 'backend');
    for (const todo of output.todos) {
      assert.strictEqual(todo.area, 'backend');
    }
  });

  test('area filter miss returns zero count', () => {
    const pendingDir = path.join(tmpDir, '.planning', 'todos', 'pending');
    fs.mkdirSync(pendingDir, { recursive: true });

    fs.writeFileSync(path.join(pendingDir, 'task-1.md'), 'title: Fix bug\narea: backend\ncreated: 2026-02-25');

    const result = runGsdTools('init todos nonexistent', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.todo_count, 0);
    assert.strictEqual(output.area_filter, 'nonexistent');
  });

  test('malformed file uses defaults', () => {
    const pendingDir = path.join(tmpDir, '.planning', 'todos', 'pending');
    fs.mkdirSync(pendingDir, { recursive: true });

    fs.writeFileSync(path.join(pendingDir, 'broken.md'), 'some random content without fields');

    const result = runGsdTools('init todos', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.todo_count, 1);
    const todo = output.todos[0];
    assert.strictEqual(todo.title, 'Untitled');
    assert.strictEqual(todo.area, 'general');
    assert.strictEqual(todo.created, 'unknown');
  });

  test('non-md files are ignored', () => {
    const pendingDir = path.join(tmpDir, '.planning', 'todos', 'pending');
    fs.mkdirSync(pendingDir, { recursive: true });

    fs.writeFileSync(path.join(pendingDir, 'task.md'), 'title: Real task\narea: dev\ncreated: 2026-01-01');
    fs.writeFileSync(path.join(pendingDir, 'notes.txt'), 'title: Not a task\narea: dev\ncreated: 2026-01-01');

    const result = runGsdTools('init todos', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.todo_count, 1);
    assert.strictEqual(output.todos[0].file, 'task.md');
  });
});

// ─────────────────────────────────────────────────────────────────────────────
// cmdInitMilestoneOp (INIT-02)
// ─────────────────────────────────────────────────────────────────────────────

describe('cmdInitMilestoneOp', () => {
  let tmpDir;

  beforeEach(() => {
    tmpDir = createTempProject();
  });

  afterEach(() => {
    cleanup(tmpDir);
  });

  test('no phase directories returns zero counts', () => {
    const result = runGsdTools('init milestone-op', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.phase_count, 0);
    assert.strictEqual(output.completed_phases, 0);
    assert.strictEqual(output.all_phases_complete, false);
  });

  test('multiple phases with no summaries', () => {
    const phase1 = path.join(tmpDir, '.planning', 'phases', '01-setup');
    const phase2 = path.join(tmpDir, '.planning', 'phases', '02-api');
    fs.mkdirSync(phase1, { recursive: true });
    fs.mkdirSync(phase2, { recursive: true });
    fs.writeFileSync(path.join(phase1, '01-01-PLAN.md'), '# Plan');
    fs.writeFileSync(path.join(phase2, '02-01-PLAN.md'), '# Plan');

    const result = runGsdTools('init milestone-op', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.phase_count, 2);
    assert.strictEqual(output.completed_phases, 0);
    assert.strictEqual(output.all_phases_complete, false);
  });

  test('mix of complete and incomplete phases', () => {
    const phase1 = path.join(tmpDir, '.planning', 'phases', '01-setup');
    const phase2 = path.join(tmpDir, '.planning', 'phases', '02-api');
    fs.mkdirSync(phase1, { recursive: true });
    fs.mkdirSync(phase2, { recursive: true });
    fs.writeFileSync(path.join(phase1, '01-01-PLAN.md'), '# Plan');
    fs.writeFileSync(path.join(phase1, '01-01-SUMMARY.md'), '# Summary');
    fs.writeFileSync(path.join(phase2, '02-01-PLAN.md'), '# Plan');

    const result = runGsdTools('init milestone-op', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.phase_count, 2);
    assert.strictEqual(output.completed_phases, 1);
    assert.strictEqual(output.all_phases_complete, false);
  });

  test('all phases complete', () => {
    const phase1 = path.join(tmpDir, '.planning', 'phases', '01-setup');
    fs.mkdirSync(phase1, { recursive: true });
    fs.writeFileSync(path.join(phase1, '01-01-PLAN.md'), '# Plan');
    fs.writeFileSync(path.join(phase1, '01-01-SUMMARY.md'), '# Summary');

    const result = runGsdTools('init milestone-op', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.phase_count, 1);
    assert.strictEqual(output.completed_phases, 1);
    assert.strictEqual(output.all_phases_complete, true);
  });

  test('archive directory scanning', () => {
    fs.mkdirSync(path.join(tmpDir, '.planning', 'archive', 'v1.0'), { recursive: true });
    fs.mkdirSync(path.join(tmpDir, '.planning', 'archive', 'v0.9'), { recursive: true });

    const result = runGsdTools('init milestone-op', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.archive_count, 2);
    assert.strictEqual(output.archived_milestones.length, 2);
  });

  test('no archive directory returns empty', () => {
    const result = runGsdTools('init milestone-op', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.archive_count, 0);
    assert.deepStrictEqual(output.archived_milestones, []);
  });
});

// ─────────────────────────────────────────────────────────────────────────────
// cmdInitPhaseOp fallback (INIT-04)
// ─────────────────────────────────────────────────────────────────────────────

describe('cmdInitPhaseOp fallback', () => {
  let tmpDir;

  beforeEach(() => {
    tmpDir = createTempProject();
  });

  afterEach(() => {
    cleanup(tmpDir);
  });

  test('normal path with existing directory', () => {
    const phaseDir = path.join(tmpDir, '.planning', 'phases', '03-api');
    fs.mkdirSync(phaseDir, { recursive: true });
    fs.writeFileSync(path.join(phaseDir, '03-CONTEXT.md'), '# Context');
    fs.writeFileSync(path.join(phaseDir, '03-01-PLAN.md'), '# Plan');
    fs.writeFileSync(
      path.join(tmpDir, '.planning', 'ROADMAP.md'),
      '# Roadmap\n\n### Phase 3: API\n**Goal:** Build API\n**Plans:** 1 plans\n'
    );

    const result = runGsdTools('init phase-op 3', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.phase_found, true);
    assert.ok(output.phase_dir.includes('03-api'), 'phase_dir should contain 03-api');
    assert.strictEqual(output.has_context, true);
    assert.strictEqual(output.has_plans, true);
  });

  test('fallback to ROADMAP when no directory exists', () => {
    fs.writeFileSync(
      path.join(tmpDir, '.planning', 'ROADMAP.md'),
      '# Roadmap\n\n### Phase 5: Widget Builder\n**Goal:** Build widgets\n**Plans:** TBD\n'
    );

    const result = runGsdTools('init phase-op 5', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.phase_found, true);
    assert.strictEqual(output.phase_dir, null);
    assert.strictEqual(output.phase_slug, 'widget-builder');
    assert.strictEqual(output.has_research, false);
    assert.strictEqual(output.has_context, false);
    assert.strictEqual(output.has_plans, false);
  });

  test('neither directory nor roadmap entry returns not found', () => {
    fs.writeFileSync(
      path.join(tmpDir, '.planning', 'ROADMAP.md'),
      '# Roadmap\n\n### Phase 1: Setup\n**Goal:** Setup project\n**Plans:** TBD\n'
    );

    const result = runGsdTools('init phase-op 99', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.phase_found, false);
    assert.strictEqual(output.phase_dir, null);
  });
});

// ─────────────────────────────────────────────────────────────────────────────
// roadmap analyze command
// ─────────────────────────────────────────────────────────────────────────────