import { describe, expect, test } from 'vitest';
import { readFileSync } from 'node:fs';
import { join } from 'node:path';
import { parseStatus } from '../src/parser.ts';

const fixture = (name: string) =>
  readFileSync(join(__dirname, 'fixtures', name), 'utf8');

describe('parseStatus', () => {
  test('parses multiple blocks preserving order and statuses', () => {
    const blocks = parseStatus(fixture('status-multi.md'));

    expect(blocks).toHaveLength(3);
    expect(blocks.map((b) => b.slug)).toEqual(['task-a', 'task-b', 'task-c']);
    expect(blocks.map((b) => b.status)).toEqual(['in_progress', 'blocked', 'open']);
  });

  test('parses Blocker field when present', () => {
    const blocks = parseStatus(fixture('status-multi.md'));
    const blocked = blocks.find((b) => b.slug === 'task-b');

    expect(blocked?.blocker).toBe('task-a');
  });

  test('Blocker field is null when absent', () => {
    const blocks = parseStatus(fixture('status-multi.md'));
    const ready = blocks.find((b) => b.slug === 'task-c');

    expect(ready?.blocker).toBeNull();
  });

  test('returns empty array for STATUS.md without task blocks', () => {
    expect(parseStatus('# Task Board\n_Updated: 2026-05-22_\n\nNo tasks yet.\n')).toEqual([]);
  });

  test.each([
    'real-books-STATUS.md',
    'real-claude-skills-STATUS.md',
    'real-projects-meta-mcp-STATUS.md',
  ])('parses real STATUS.md fixture %s without crashing and yields ≥1 block', (name) => {
    const blocks = parseStatus(fixture(name));

    expect(blocks.length).toBeGreaterThan(0);
    for (const b of blocks) {
      expect(b.slug).toMatch(/^[a-z0-9][a-z0-9-]*$/);
      expect(b.status).toMatch(/^(open|in_progress|paused|blocked|done)$/);
      expect(b.status_emoji).toMatch(/^(⚪|🔴|🟡|🔵|🟢)$/u);
      expect(b.title.length).toBeGreaterThan(0);
    }
  });

  test('ignores blocks whose H2 has no known status emoji', () => {
    const text = '## 🚀 [some-task] — title\n**Status:** custom\n**Branch:** master\n---\n';
    expect(parseStatus(text)).toEqual([]);
  });

  test('parses a single active block with all fields', () => {
    const blocks = parseStatus(fixture('status-single-block.md'));

    expect(blocks).toHaveLength(1);
    expect(blocks[0]).toEqual({
      slug: 'board-viewer-pointers',
      title: 'pre-impl: fill Domain conventions with design-context pointers',
      status: 'in_progress',
      status_emoji: '🔴',
      where_stopped: 'только что промочен дизайн.',
      next_action: 'вставить блок в `.wiki/CLAUDE.md`.',
      blocker: null,
      branch: 'master',
    });
  });
});