import { describe, expect, it } from 'vitest';

import { parseTasksFile, writeTasksFile } from '../src/tasks-file.js';
import type { MissionTask } from '../src/types.js';

describe('parseTasksFile', () => {
  it('normalizes legacy statuses from TASKS.md', () => {
    const content = [
      '# Tasks — Demo',
      '',
      '| id | status | milestone | description | pr | notes |',
      '|----|--------|-----------|-------------|----|-------|',
      '| T-1 | pending | phase-1 | First task | #10 | note a |',
      '| T-2 | completed | phase-1 | Second task | #11 | note b |',
      '| T-3 | in_progress | phase-2 | Third task |  |  |',
      '| T-4 | failed | phase-2 | Fourth task |  |  |',
      '',
      'trailing text ignored',
    ].join('\n');

    const tasks = parseTasksFile(content);

    expect(tasks).toHaveLength(4);
    expect(tasks.map((task) => task.status)).toEqual([
      'not-started',
      'done',
      'in-progress',
      'blocked',
    ]);
    expect(tasks.map((task) => task.rawStatus)).toEqual([
      'pending',
      'completed',
      'in_progress',
      'failed',
    ]);
    expect(tasks[0]?.line).toBe(5);
  });
});

describe('writeTasksFile', () => {
  it('round-trips parse/write output', () => {
    const tasks: MissionTask[] = [
      {
        id: 'W3-001',
        title: 'Implement parser',
        status: 'not-started',
        milestone: 'phase-1',
        pr: '#20',
        notes: 'pending',
        dependencies: [],
      },
      {
        id: 'W3-002',
        title: 'Implement runner',
        status: 'in-progress',
        milestone: 'phase-2',
        notes: 'active',
        dependencies: [],
      },
    ];

    const content = writeTasksFile(tasks);
    const reparsed = parseTasksFile(content);

    expect(reparsed).toHaveLength(2);
    expect(reparsed.map((task) => task.id)).toEqual(['W3-001', 'W3-002']);
    expect(reparsed.map((task) => task.status)).toEqual([
      'not-started',
      'in-progress',
    ]);
    expect(reparsed[0]?.title).toBe('Implement parser');
    expect(reparsed[1]?.milestone).toBe('phase-2');
  });
});