/**
 * GSD Tools Tests - Milestone
 */

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('milestone complete command', () => {
  let tmpDir;

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

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

  test('archives roadmap, requirements, creates MILESTONES.md', () => {
    fs.writeFileSync(
      path.join(tmpDir, '.planning', 'ROADMAP.md'),
      `# Roadmap v1.0 MVP\n\n### Phase 1: Foundation\n**Goal:** Setup\n`
    );
    fs.writeFileSync(
      path.join(tmpDir, '.planning', 'REQUIREMENTS.md'),
      `# Requirements\n\n- [ ] User auth\n- [ ] Dashboard\n`
    );
    fs.writeFileSync(
      path.join(tmpDir, '.planning', 'STATE.md'),
      `# State\n\n**Status:** In progress\n**Last Activity:** 2025-01-01\n**Last Activity Description:** Working\n`
    );

    const p1 = path.join(tmpDir, '.planning', 'phases', '01-foundation');
    fs.mkdirSync(p1, { recursive: true });
    fs.writeFileSync(
      path.join(p1, '01-01-SUMMARY.md'),
      `---\none-liner: Set up project infrastructure\n---\n# Summary\n`
    );

    const result = runGsdTools('milestone complete v1.0 --name MVP Foundation', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.version, 'v1.0');
    assert.strictEqual(output.phases, 1);
    assert.ok(output.archived.roadmap, 'roadmap should be archived');
    assert.ok(output.archived.requirements, 'requirements should be archived');

    // Verify archive files exist
    assert.ok(
      fs.existsSync(path.join(tmpDir, '.planning', 'milestones', 'v1.0-ROADMAP.md')),
      'archived roadmap should exist'
    );
    assert.ok(
      fs.existsSync(path.join(tmpDir, '.planning', 'milestones', 'v1.0-REQUIREMENTS.md')),
      'archived requirements should exist'
    );

    // Verify MILESTONES.md created
    assert.ok(
      fs.existsSync(path.join(tmpDir, '.planning', 'MILESTONES.md')),
      'MILESTONES.md should be created'
    );
    const milestones = fs.readFileSync(path.join(tmpDir, '.planning', 'MILESTONES.md'), 'utf-8');
    assert.ok(milestones.includes('v1.0 MVP Foundation'), 'milestone entry should contain name');
    assert.ok(milestones.includes('Set up project infrastructure'), 'accomplishments should be listed');
  });

  test('appends to existing MILESTONES.md', () => {
    fs.writeFileSync(
      path.join(tmpDir, '.planning', 'MILESTONES.md'),
      `# Milestones\n\n## v0.9 Alpha (Shipped: 2025-01-01)\n\n---\n\n`
    );
    fs.writeFileSync(
      path.join(tmpDir, '.planning', 'ROADMAP.md'),
      `# Roadmap v1.0\n`
    );
    fs.writeFileSync(
      path.join(tmpDir, '.planning', 'STATE.md'),
      `# State\n\n**Status:** In progress\n**Last Activity:** 2025-01-01\n**Last Activity Description:** Working\n`
    );

    const result = runGsdTools('milestone complete v1.0 --name Beta', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const milestones = fs.readFileSync(path.join(tmpDir, '.planning', 'MILESTONES.md'), 'utf-8');
    assert.ok(milestones.includes('v0.9 Alpha'), 'existing entry should be preserved');
    assert.ok(milestones.includes('v1.0 Beta'), 'new entry should be appended');
  });

  test('archives phase directories with --archive-phases flag', () => {
    fs.writeFileSync(
      path.join(tmpDir, '.planning', 'ROADMAP.md'),
      `# Roadmap v1.0\n`
    );
    fs.writeFileSync(
      path.join(tmpDir, '.planning', 'STATE.md'),
      `# State\n\n**Status:** In progress\n**Last Activity:** 2025-01-01\n**Last Activity Description:** Working\n`
    );

    const p1 = path.join(tmpDir, '.planning', 'phases', '01-foundation');
    fs.mkdirSync(p1, { recursive: true });
    fs.writeFileSync(
      path.join(p1, '01-01-SUMMARY.md'),
      `---\none-liner: Set up project infrastructure\n---\n# Summary\n`
    );

    const result = runGsdTools('milestone complete v1.0 --name MVP --archive-phases', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.archived.phases, true, 'phases should be archived');

    // Phase directory moved to milestones/v1.0-phases/
    assert.ok(
      fs.existsSync(path.join(tmpDir, '.planning', 'milestones', 'v1.0-phases', '01-foundation')),
      'archived phase directory should exist in milestones/v1.0-phases/'
    );

    // Original phase directory no longer exists
    assert.ok(
      !fs.existsSync(p1),
      'original phase directory should no longer exist'
    );
  });

  test('archived REQUIREMENTS.md contains archive header', () => {
    fs.writeFileSync(
      path.join(tmpDir, '.planning', 'REQUIREMENTS.md'),
      `# Requirements\n\n- [ ] **TEST-01**: core.cjs has tests\n- [ ] **TEST-02**: more tests\n`
    );
    fs.writeFileSync(
      path.join(tmpDir, '.planning', 'ROADMAP.md'),
      `# Roadmap v1.0\n`
    );
    fs.writeFileSync(
      path.join(tmpDir, '.planning', 'STATE.md'),
      `# State\n\n**Status:** In progress\n**Last Activity:** 2025-01-01\n**Last Activity Description:** Working\n`
    );

    const result = runGsdTools('milestone complete v1.0 --name MVP', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const archivedReq = fs.readFileSync(
      path.join(tmpDir, '.planning', 'milestones', 'v1.0-REQUIREMENTS.md'), 'utf-8'
    );
    assert.ok(archivedReq.includes('Requirements Archive: v1.0'), 'should contain archive version');
    assert.ok(archivedReq.includes('SHIPPED'), 'should contain SHIPPED status');
    assert.ok(archivedReq.includes('Archived:'), 'should contain Archived: date line');
    // Original content preserved after header
    assert.ok(archivedReq.includes('# Requirements'), 'original content should be preserved');
    assert.ok(archivedReq.includes('**TEST-01**'), 'original requirement items should be preserved');
  });

  test('STATE.md gets updated during milestone complete', () => {
    fs.writeFileSync(
      path.join(tmpDir, '.planning', 'ROADMAP.md'),
      `# Roadmap v1.0\n`
    );
    fs.writeFileSync(
      path.join(tmpDir, '.planning', 'STATE.md'),
      `# State\n\n**Status:** In progress\n**Last Activity:** 2025-01-01\n**Last Activity Description:** Working\n`
    );

    const result = runGsdTools('milestone complete v1.0 --name Test', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.state_updated, true, 'state_updated should be true');

    const state = fs.readFileSync(path.join(tmpDir, '.planning', 'STATE.md'), 'utf-8');
    assert.ok(state.includes('v1.0 milestone complete'), 'status should be updated to milestone complete');
    assert.ok(
      state.includes('v1.0 milestone completed and archived'),
      'last activity description should reference milestone completion'
    );
  });

  test('handles missing ROADMAP.md gracefully', () => {
    // Only STATE.md — no ROADMAP.md, no REQUIREMENTS.md
    fs.writeFileSync(
      path.join(tmpDir, '.planning', 'STATE.md'),
      `# State\n\n**Status:** In progress\n**Last Activity:** 2025-01-01\n**Last Activity Description:** Working\n`
    );

    const result = runGsdTools('milestone complete v1.0 --name NoRoadmap', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.archived.roadmap, false, 'roadmap should not be archived');
    assert.strictEqual(output.archived.requirements, false, 'requirements should not be archived');
    assert.strictEqual(output.milestones_updated, true, 'MILESTONES.md should still be created');

    assert.ok(
      fs.existsSync(path.join(tmpDir, '.planning', 'MILESTONES.md')),
      'MILESTONES.md should be created even without ROADMAP.md'
    );
  });

  test('handles empty phases directory', () => {
    fs.writeFileSync(
      path.join(tmpDir, '.planning', 'ROADMAP.md'),
      `# Roadmap v1.0\n`
    );
    fs.writeFileSync(
      path.join(tmpDir, '.planning', 'STATE.md'),
      `# State\n\n**Status:** In progress\n**Last Activity:** 2025-01-01\n**Last Activity Description:** Working\n`
    );
    // phases directory exists but is empty (from createTempProject)

    const result = runGsdTools('milestone complete v1.0 --name EmptyPhases', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.phases, 0, 'phase count should be 0');
    assert.strictEqual(output.plans, 0, 'plan count should be 0');
    assert.strictEqual(output.tasks, 0, 'task count should be 0');
  });
});

// ─────────────────────────────────────────────────────────────────────────────
// requirements mark-complete command
// ─────────────────────────────────────────────────────────────────────────────

describe('requirements mark-complete command', () => {
  let tmpDir;

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

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

  // ─── helpers ──────────────────────────────────────────────────────────────

  function writeRequirements(tmpDir, content) {
    fs.writeFileSync(path.join(tmpDir, '.planning', 'REQUIREMENTS.md'), content, 'utf-8');
  }

  function readRequirements(tmpDir) {
    return fs.readFileSync(path.join(tmpDir, '.planning', 'REQUIREMENTS.md'), 'utf-8');
  }

  const STANDARD_REQUIREMENTS = `# Requirements

## Test Coverage
- [ ] **TEST-01**: core.cjs has tests for loadConfig
- [ ] **TEST-02**: core.cjs has tests for resolveModelInternal
- [x] **TEST-03**: core.cjs has tests for escapeRegex (already complete)

## Bug Regressions
- [ ] **REG-01**: Test confirms loadConfig returns model_overrides

## Infrastructure
- [ ] **INFRA-01**: GitHub Actions workflow runs tests

## Traceability

| Requirement | Phase | Status |
|-------------|-------|--------|
| TEST-01 | Phase 1 | Pending |
| TEST-02 | Phase 1 | Pending |
| TEST-03 | Phase 1 | Complete |
| REG-01 | Phase 1 | Pending |
| INFRA-01 | Phase 6 | Pending |
`;

  // ─── tests ────────────────────────────────────────────────────────────────

  test('marks single requirement complete (checkbox + table)', () => {
    writeRequirements(tmpDir, STANDARD_REQUIREMENTS);

    const result = runGsdTools('requirements mark-complete TEST-01', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.updated, true);
    assert.ok(output.marked_complete.includes('TEST-01'), 'TEST-01 should be marked complete');

    const content = readRequirements(tmpDir);
    assert.ok(content.includes('- [x] **TEST-01**'), 'checkbox should be checked');
    assert.ok(content.includes('| TEST-01 | Phase 1 | Complete |'), 'table row should be Complete');
    // Other checkboxes unchanged
    assert.ok(content.includes('- [ ] **TEST-02**'), 'TEST-02 should remain unchecked');
  });

  test('handles mixed prefixes in single call (TEST-XX, REG-XX, INFRA-XX)', () => {
    writeRequirements(tmpDir, STANDARD_REQUIREMENTS);

    const result = runGsdTools('requirements mark-complete TEST-01,REG-01,INFRA-01', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.marked_complete.length, 3, 'should mark 3 requirements complete');
    assert.ok(output.marked_complete.includes('TEST-01'));
    assert.ok(output.marked_complete.includes('REG-01'));
    assert.ok(output.marked_complete.includes('INFRA-01'));

    const content = readRequirements(tmpDir);
    assert.ok(content.includes('- [x] **TEST-01**'), 'TEST-01 checkbox should be checked');
    assert.ok(content.includes('- [x] **REG-01**'), 'REG-01 checkbox should be checked');
    assert.ok(content.includes('- [x] **INFRA-01**'), 'INFRA-01 checkbox should be checked');
    assert.ok(content.includes('| TEST-01 | Phase 1 | Complete |'), 'TEST-01 table should be Complete');
    assert.ok(content.includes('| REG-01 | Phase 1 | Complete |'), 'REG-01 table should be Complete');
    assert.ok(content.includes('| INFRA-01 | Phase 6 | Complete |'), 'INFRA-01 table should be Complete');
  });

  test('accepts space-separated IDs', () => {
    writeRequirements(tmpDir, STANDARD_REQUIREMENTS);

    const result = runGsdTools('requirements mark-complete TEST-01 TEST-02', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.marked_complete.length, 2, 'should mark 2 requirements complete');

    const content = readRequirements(tmpDir);
    assert.ok(content.includes('- [x] **TEST-01**'), 'TEST-01 should be checked');
    assert.ok(content.includes('- [x] **TEST-02**'), 'TEST-02 should be checked');
  });

  test('accepts bracket-wrapped IDs [REQ-01, REQ-02]', () => {
    writeRequirements(tmpDir, STANDARD_REQUIREMENTS);

    const result = runGsdTools('requirements mark-complete [TEST-01,TEST-02]', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.marked_complete.length, 2, 'should mark 2 requirements complete');

    const content = readRequirements(tmpDir);
    assert.ok(content.includes('- [x] **TEST-01**'), 'TEST-01 should be checked');
    assert.ok(content.includes('- [x] **TEST-02**'), 'TEST-02 should be checked');
  });

  test('returns not_found for invalid IDs while updating valid ones', () => {
    writeRequirements(tmpDir, STANDARD_REQUIREMENTS);

    const result = runGsdTools('requirements mark-complete TEST-01,FAKE-99', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.updated, true, 'should still update valid IDs');
    assert.ok(output.marked_complete.includes('TEST-01'), 'TEST-01 should be marked complete');
    assert.ok(output.not_found.includes('FAKE-99'), 'FAKE-99 should be in not_found');
    assert.strictEqual(output.total, 2, 'total should reflect all IDs attempted');
  });

  test('idempotent — re-marking already-complete requirement does not corrupt', () => {
    writeRequirements(tmpDir, STANDARD_REQUIREMENTS);

    // TEST-03 already has [x] and Complete in the fixture
    const result = runGsdTools('requirements mark-complete TEST-03', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    // Regex only matches [ ] (space), not [x], so TEST-03 goes to not_found
    assert.ok(output.not_found.includes('TEST-03'), 'already-complete ID should be in not_found');

    const content = readRequirements(tmpDir);
    // File should not be corrupted — no [xx] or doubled markers
    assert.ok(content.includes('- [x] **TEST-03**'), 'existing [x] should remain intact');
    assert.ok(!content.includes('[xx]'), 'should not have doubled x markers');
    assert.ok(!content.includes('- [x] [x]'), 'should not have duplicate checkbox');
  });

  test('missing REQUIREMENTS.md returns expected error structure', () => {
    // createTempProject does not create REQUIREMENTS.md — so it's already missing

    const result = runGsdTools('requirements mark-complete TEST-01', tmpDir);
    assert.ok(result.success, `Command failed: ${result.error}`);

    const output = JSON.parse(result.output);
    assert.strictEqual(output.updated, false, 'updated should be false');
    assert.strictEqual(output.reason, 'REQUIREMENTS.md not found', 'should report file not found');
  });
});

// ─────────────────────────────────────────────────────────────────────────────
// validate consistency command
// ─────────────────────────────────────────────────────────────────────────────