import { describe, it, expect, beforeEach } from 'vitest';
import { mkdtemp, mkdir, writeFile } from 'node:fs/promises';
import { tmpdir } from 'node:os';
import { join } from 'node:path';
import { writeCache } from '../../src/lib/cache.js';
import { makeMetaTools } from '../../src/tools/meta.js';
import type { Paths } from '../../src/lib/config.js';

function mkPaths(home: string): Paths {
  const cacheDir = join(home, '.cache');
  return {
    cacheDir,
    cacheFile: join(cacheDir, 'tasks.json'),
    syncLog: join(cacheDir, 'sync.log'),
    authFile: join(home, '.config', 'auth.toml'),
    sharedWikiClone: join(home, 'wiki'),
    agendaTasksDir: join(home, 'tasks'),
  };
}

describe('meta.status', () => {
  let paths: Paths;

  beforeEach(async () => {
    const home = await mkdtemp(join(tmpdir(), 'meta-'));
    paths = mkPaths(home);
    await mkdir(paths.sharedWikiClone, { recursive: true });
    await mkdir(join(paths.sharedWikiClone, 'node'), { recursive: true });
    await writeFile(
      join(paths.sharedWikiClone, 'node', 'one.md'),
      '---\ntitle: t\ndomain: node\n---\n\nbody',
    );
  });

  it('reports cache_missing when no cache', async () => {
    const tools = makeMetaTools({ paths });
    const r = await (tools.find((t) => t.name === 'meta.status')!.handler({}));
    const parsed = JSON.parse(r.content[0].text);
    expect(parsed.cache_missing).toBe(true);
    expect(parsed.wiki_pages_count).toBe(1);
    expect(parsed.agenda_present).toBe(false);
    expect(parsed.agenda_tasks_dir).toBe(paths.agendaTasksDir);
  });

  it('reports age and stale=false for fresh cache', async () => {
    await writeCache(paths.cacheFile, {
      schemaVersion: 3,
      synced_at: new Date().toISOString(),
      synced_from: 'https://g',
      machine: 'm',
      projects: [],
      errors: [],
    });
    const tools = makeMetaTools({ paths });
    const r = await (tools.find((t) => t.name === 'meta.status')!.handler({}));
    const parsed = JSON.parse(r.content[0].text);
    expect(parsed.stale).toBe(false);
    expect(parsed.age_seconds).toBeGreaterThanOrEqual(0);
  });

  it('reports stale=true for >24h cache', async () => {
    const old = new Date(Date.now() - 25 * 3600 * 1000).toISOString();
    await writeCache(paths.cacheFile, {
      schemaVersion: 3,
      synced_at: old,
      synced_from: 'https://g',
      machine: 'm',
      projects: [{ name: 'p', default_branch: 'main', fetched_at: old, active_tasks: [], all_tasks_count: 0, raw: '' }],
      errors: [{ project: 'q', reason: 'x' }],
    });
    const tools = makeMetaTools({ paths });
    const r = await (tools.find((t) => t.name === 'meta.status')!.handler({}));
    const parsed = JSON.parse(r.content[0].text);
    expect(parsed.stale).toBe(true);
    expect(parsed.projects_count).toBe(1);
    expect(parsed.errors_count).toBe(1);
  });

  it('exposes agenda-project counts and source=local when agenda default_branch is "local"', async () => {
    await writeCache(paths.cacheFile, {
      schemaVersion: 3,
      synced_at: new Date().toISOString(),
      synced_from: 'https://g',
      machine: 'm',
      projects: [
        { name: 'p', default_branch: 'main', fetched_at: new Date().toISOString(), active_tasks: [], all_tasks_count: 0, raw: '' },
        {
          name: 'agenda',
          default_branch: 'local',
          fetched_at: new Date().toISOString(),
          active_tasks: [
            { slug: 'm1', status: 'active', next: 'do x' },
            { slug: 'm2', status: 'paused', next: 'do y' },
          ],
          all_tasks_count: 3,
          raw: '...',
        },
      ],
      errors: [],
    });
    const tools = makeMetaTools({ paths });
    const r = await (tools.find((t) => t.name === 'meta.status')!.handler({}));
    const parsed = JSON.parse(r.content[0].text);
    expect(parsed.agenda_present).toBe(true);
    expect(parsed.agenda_tasks_active).toBe(2);
    expect(parsed.agenda_tasks_total).toBe(3);
    expect(parsed.agenda_source).toBe('local');
    expect(parsed.agenda_branch).toBe('local');
  });

  it('reports agenda_source=gitea when agenda default_branch is a real branch', async () => {
    await writeCache(paths.cacheFile, {
      schemaVersion: 3,
      synced_at: new Date().toISOString(),
      synced_from: 'https://g',
      machine: 'm',
      projects: [
        {
          name: 'agenda',
          default_branch: 'main',
          fetched_at: new Date().toISOString(),
          active_tasks: [{ slug: 'g1', status: 'active', next: 'x' }],
          all_tasks_count: 1,
          raw: '...',
        },
      ],
      errors: [],
    });
    const tools = makeMetaTools({ paths });
    const r = await (tools.find((t) => t.name === 'meta.status')!.handler({}));
    const parsed = JSON.parse(r.content[0].text);
    expect(parsed.agenda_present).toBe(true);
    expect(parsed.agenda_source).toBe('gitea');
    expect(parsed.agenda_branch).toBe('main');
  });

  it('reports agenda_source=none when agenda absent', async () => {
    await writeCache(paths.cacheFile, {
      schemaVersion: 3,
      synced_at: new Date().toISOString(),
      synced_from: 'https://g',
      machine: 'm',
      projects: [{ name: 'p', default_branch: 'main', fetched_at: new Date().toISOString(), active_tasks: [], all_tasks_count: 0, raw: '' }],
      errors: [],
    });
    const tools = makeMetaTools({ paths });
    const r = await (tools.find((t) => t.name === 'meta.status')!.handler({}));
    const parsed = JSON.parse(r.content[0].text);
    expect(parsed.agenda_present).toBe(false);
    expect(parsed.agenda_source).toBe('none');
    expect(parsed.agenda_branch).toBeNull();
  });
});