/**
 * Unit tests for MCP note tools: create_day_note, update_day_note, delete_day_note,
 * create_collab_note, update_collab_note, delete_collab_note.
 */
import { describe, it, expect, vi, beforeAll, beforeEach, afterAll } from 'vitest';

const { testDb, dbMock } = vi.hoisted(() => {
  const Database = require('better-sqlite3');
  const db = new Database(':memory:');
  db.exec('PRAGMA journal_mode = WAL');
  db.exec('PRAGMA foreign_keys = ON');
  db.exec('PRAGMA busy_timeout = 5000');
  const mock = {
    db,
    closeDb: () => {},
    reinitialize: () => {},
    getPlaceWithTags: () => null,
    canAccessTrip: (tripId: any, userId: number) =>
      db.prepare(`SELECT t.id, t.user_id FROM trips t LEFT JOIN trip_members m ON m.trip_id = t.id AND m.user_id = ? WHERE t.id = ? AND (t.user_id = ? OR m.user_id IS NOT NULL)`).get(userId, tripId, userId),
    isOwner: (tripId: any, userId: number) =>
      !!db.prepare('SELECT id FROM trips WHERE id = ? AND user_id = ?').get(tripId, userId),
  };
  return { testDb: db, dbMock: mock };
});

vi.mock('../../../src/db/database', () => dbMock);
vi.mock('../../../src/config', () => ({
  JWT_SECRET: 'test-jwt-secret-for-trek-testing-only',
  ENCRYPTION_KEY: 'a1b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6a7b8c9d0e1f2a3b4c5d6a7b8c9d0e1f2',
  updateJwtSecret: () => {},
}));

const { broadcastMock, unlinkSyncMock } = vi.hoisted(() => ({
  broadcastMock: vi.fn(),
  unlinkSyncMock: vi.fn(),
}));
vi.mock('../../../src/websocket', () => ({ broadcast: broadcastMock }));
vi.mock('fs', async (importOriginal) => {
  const actual = await importOriginal<typeof import('fs')>();
  return { ...actual, unlinkSync: unlinkSyncMock };
});

import { createTables } from '../../../src/db/schema';
import { runMigrations } from '../../../src/db/migrations';
import { resetTestDb } from '../../helpers/test-db';
import { createUser, createTrip, createDay, createDayNote, createCollabNote } from '../../helpers/factories';
import { createMcpHarness, parseToolResult, type McpHarness } from '../../helpers/mcp-harness';

beforeAll(() => {
  createTables(testDb);
  runMigrations(testDb);
});

beforeEach(() => {
  resetTestDb(testDb);
  broadcastMock.mockClear();
  unlinkSyncMock.mockClear();
  delete process.env.DEMO_MODE;
});

afterAll(() => {
  testDb.close();
});

async function withHarness(userId: number, fn: (h: McpHarness) => Promise<void>) {
  const h = await createMcpHarness({ userId, withResources: false });
  try { await fn(h); } finally { await h.cleanup(); }
}

// ---------------------------------------------------------------------------
// create_day_note
// ---------------------------------------------------------------------------

describe('Tool: create_day_note', () => {
  it('creates a note on a day', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id);
    const day = createDay(testDb, trip.id);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({
        name: 'create_day_note',
        arguments: { tripId: trip.id, dayId: day.id, text: 'Check in at noon', time: '12:00', icon: '🏨' },
      });
      const data = parseToolResult(result) as any;
      expect(data.note.text).toBe('Check in at noon');
      expect(data.note.time).toBe('12:00');
      expect(data.note.icon).toBe('🏨');
    });
  });

  it('defaults icon to 📝', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id);
    const day = createDay(testDb, trip.id);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({
        name: 'create_day_note',
        arguments: { tripId: trip.id, dayId: day.id, text: 'A note' },
      });
      const data = parseToolResult(result) as any;
      expect(data.note.icon).toBe('📝');
    });
  });

  it('broadcasts dayNote:created event', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id);
    const day = createDay(testDb, trip.id);
    await withHarness(user.id, async (h) => {
      await h.client.callTool({ name: 'create_day_note', arguments: { tripId: trip.id, dayId: day.id, text: 'Note' } });
      expect(broadcastMock).toHaveBeenCalledWith(trip.id, 'dayNote:created', expect.any(Object));
    });
  });

  it('returns error when day does not belong to trip', async () => {
    const { user } = createUser(testDb);
    const trip1 = createTrip(testDb, user.id);
    const trip2 = createTrip(testDb, user.id);
    const dayFromTrip2 = createDay(testDb, trip2.id);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'create_day_note', arguments: { tripId: trip1.id, dayId: dayFromTrip2.id, text: 'Note' } });
      expect(result.isError).toBe(true);
    });
  });

  it('returns access denied for non-member', async () => {
    const { user } = createUser(testDb);
    const { user: other } = createUser(testDb);
    const trip = createTrip(testDb, other.id);
    const day = createDay(testDb, trip.id);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'create_day_note', arguments: { tripId: trip.id, dayId: day.id, text: 'X' } });
      expect(result.isError).toBe(true);
    });
  });
});

// ---------------------------------------------------------------------------
// update_day_note
// ---------------------------------------------------------------------------

describe('Tool: update_day_note', () => {
  it('updates note text, time, icon', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id);
    const day = createDay(testDb, trip.id);
    const note = createDayNote(testDb, day.id, trip.id, { text: 'Old text', time: '09:00', icon: '📝' });
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({
        name: 'update_day_note',
        arguments: { tripId: trip.id, dayId: day.id, noteId: note.id, text: 'New text', time: '14:00', icon: '🍽️' },
      });
      const data = parseToolResult(result) as any;
      expect(data.note.text).toBe('New text');
      expect(data.note.time).toBe('14:00');
      expect(data.note.icon).toBe('🍽️');
    });
  });

  it('trims text whitespace', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id);
    const day = createDay(testDb, trip.id);
    const note = createDayNote(testDb, day.id, trip.id);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({
        name: 'update_day_note',
        arguments: { tripId: trip.id, dayId: day.id, noteId: note.id, text: '  Trimmed  ' },
      });
      const data = parseToolResult(result) as any;
      expect(data.note.text).toBe('Trimmed');
    });
  });

  it('broadcasts dayNote:updated event', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id);
    const day = createDay(testDb, trip.id);
    const note = createDayNote(testDb, day.id, trip.id);
    await withHarness(user.id, async (h) => {
      await h.client.callTool({ name: 'update_day_note', arguments: { tripId: trip.id, dayId: day.id, noteId: note.id, text: 'Updated' } });
      expect(broadcastMock).toHaveBeenCalledWith(trip.id, 'dayNote:updated', expect.any(Object));
    });
  });

  it('returns error when note not found', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id);
    const day = createDay(testDb, trip.id);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'update_day_note', arguments: { tripId: trip.id, dayId: day.id, noteId: 99999, text: 'X' } });
      expect(result.isError).toBe(true);
    });
  });

  it('returns access denied for non-member', async () => {
    const { user } = createUser(testDb);
    const { user: other } = createUser(testDb);
    const trip = createTrip(testDb, other.id);
    const day = createDay(testDb, trip.id);
    const note = createDayNote(testDb, day.id, trip.id);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'update_day_note', arguments: { tripId: trip.id, dayId: day.id, noteId: note.id, text: 'X' } });
      expect(result.isError).toBe(true);
    });
  });
});

// ---------------------------------------------------------------------------
// delete_day_note
// ---------------------------------------------------------------------------

describe('Tool: delete_day_note', () => {
  it('deletes a day note', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id);
    const day = createDay(testDb, trip.id);
    const note = createDayNote(testDb, day.id, trip.id);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'delete_day_note', arguments: { tripId: trip.id, dayId: day.id, noteId: note.id } });
      const data = parseToolResult(result) as any;
      expect(data.success).toBe(true);
      expect(testDb.prepare('SELECT id FROM day_notes WHERE id = ?').get(note.id)).toBeUndefined();
    });
  });

  it('broadcasts dayNote:deleted event', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id);
    const day = createDay(testDb, trip.id);
    const note = createDayNote(testDb, day.id, trip.id);
    await withHarness(user.id, async (h) => {
      await h.client.callTool({ name: 'delete_day_note', arguments: { tripId: trip.id, dayId: day.id, noteId: note.id } });
      expect(broadcastMock).toHaveBeenCalledWith(trip.id, 'dayNote:deleted', expect.any(Object));
    });
  });

  it('returns error when note not found', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id);
    const day = createDay(testDb, trip.id);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'delete_day_note', arguments: { tripId: trip.id, dayId: day.id, noteId: 99999 } });
      expect(result.isError).toBe(true);
    });
  });

  it('returns access denied for non-member', async () => {
    const { user } = createUser(testDb);
    const { user: other } = createUser(testDb);
    const trip = createTrip(testDb, other.id);
    const day = createDay(testDb, trip.id);
    const note = createDayNote(testDb, day.id, trip.id);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'delete_day_note', arguments: { tripId: trip.id, dayId: day.id, noteId: note.id } });
      expect(result.isError).toBe(true);
    });
  });
});

// ---------------------------------------------------------------------------
// create_collab_note
// ---------------------------------------------------------------------------

describe('Tool: create_collab_note', () => {
  it('creates a collab note with all fields', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({
        name: 'create_collab_note',
        arguments: { tripId: trip.id, title: 'Ideas', content: 'Visit museums', category: 'Culture', color: '#3b82f6' },
      });
      const data = parseToolResult(result) as any;
      expect(data.note.title).toBe('Ideas');
      expect(data.note.content).toBe('Visit museums');
      expect(data.note.category).toBe('Culture');
      expect(data.note.color).toBe('#3b82f6');
    });
  });

  it('defaults category to "General" and color to "#6366f1"', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'create_collab_note', arguments: { tripId: trip.id, title: 'Quick note' } });
      const data = parseToolResult(result) as any;
      expect(data.note.category).toBe('General');
      expect(data.note.color).toBe('#6366f1');
    });
  });

  it('broadcasts collab:note:created event', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id);
    await withHarness(user.id, async (h) => {
      await h.client.callTool({ name: 'create_collab_note', arguments: { tripId: trip.id, title: 'Note' } });
      expect(broadcastMock).toHaveBeenCalledWith(trip.id, 'collab:note:created', expect.any(Object));
    });
  });

  it('returns access denied for non-member', async () => {
    const { user } = createUser(testDb);
    const { user: other } = createUser(testDb);
    const trip = createTrip(testDb, other.id);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'create_collab_note', arguments: { tripId: trip.id, title: 'X' } });
      expect(result.isError).toBe(true);
    });
  });
});

// ---------------------------------------------------------------------------
// update_collab_note
// ---------------------------------------------------------------------------

describe('Tool: update_collab_note', () => {
  it('updates collab note fields', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id);
    const note = createCollabNote(testDb, trip.id, user.id, { title: 'Old', color: '#6366f1' });
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({
        name: 'update_collab_note',
        arguments: { tripId: trip.id, noteId: note.id, title: 'New Title', pinned: true, color: '#3b82f6' },
      });
      const data = parseToolResult(result) as any;
      expect(data.note.title).toBe('New Title');
      expect(data.note.pinned).toBe(1);
      expect(data.note.color).toBe('#3b82f6');
    });
  });

  it('broadcasts collab:note:updated event', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id);
    const note = createCollabNote(testDb, trip.id, user.id);
    await withHarness(user.id, async (h) => {
      await h.client.callTool({ name: 'update_collab_note', arguments: { tripId: trip.id, noteId: note.id, title: 'Updated' } });
      expect(broadcastMock).toHaveBeenCalledWith(trip.id, 'collab:note:updated', expect.any(Object));
    });
  });

  it('returns error when note not found', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'update_collab_note', arguments: { tripId: trip.id, noteId: 99999, title: 'X' } });
      expect(result.isError).toBe(true);
    });
  });

  it('returns access denied for non-member', async () => {
    const { user } = createUser(testDb);
    const { user: other } = createUser(testDb);
    const trip = createTrip(testDb, other.id);
    const note = createCollabNote(testDb, trip.id, other.id);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'update_collab_note', arguments: { tripId: trip.id, noteId: note.id, title: 'X' } });
      expect(result.isError).toBe(true);
    });
  });
});

// ---------------------------------------------------------------------------
// delete_collab_note
// ---------------------------------------------------------------------------

describe('Tool: delete_collab_note', () => {
  it('deletes a collab note', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id);
    const note = createCollabNote(testDb, trip.id, user.id);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'delete_collab_note', arguments: { tripId: trip.id, noteId: note.id } });
      const data = parseToolResult(result) as any;
      expect(data.success).toBe(true);
      expect(testDb.prepare('SELECT id FROM collab_notes WHERE id = ?').get(note.id)).toBeUndefined();
    });
  });

  it('deletes associated trip_files records from the database', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id);
    const note = createCollabNote(testDb, trip.id, user.id);
    // Insert a trip_file linked to this note
    testDb.prepare(
      `INSERT INTO trip_files (trip_id, note_id, filename, original_name, mime_type, file_size) VALUES (?, ?, ?, ?, ?, ?)`
    ).run(trip.id, note.id, 'test-file.pdf', 'document.pdf', 'application/pdf', 1024);

    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'delete_collab_note', arguments: { tripId: trip.id, noteId: note.id } });
      expect((parseToolResult(result) as any).success).toBe(true);
    });

    // trip_files rows are deleted as part of the transaction
    expect(testDb.prepare('SELECT id FROM trip_files WHERE note_id = ?').all(note.id)).toHaveLength(0);
    // note itself is deleted
    expect(testDb.prepare('SELECT id FROM collab_notes WHERE id = ?').get(note.id)).toBeUndefined();
  });

  it('broadcasts collab:note:deleted event', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id);
    const note = createCollabNote(testDb, trip.id, user.id);
    await withHarness(user.id, async (h) => {
      await h.client.callTool({ name: 'delete_collab_note', arguments: { tripId: trip.id, noteId: note.id } });
      expect(broadcastMock).toHaveBeenCalledWith(trip.id, 'collab:note:deleted', expect.any(Object));
    });
  });

  it('returns error when note not found', async () => {
    const { user } = createUser(testDb);
    const trip = createTrip(testDb, user.id);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'delete_collab_note', arguments: { tripId: trip.id, noteId: 99999 } });
      expect(result.isError).toBe(true);
    });
  });

  it('returns access denied for non-member', async () => {
    const { user } = createUser(testDb);
    const { user: other } = createUser(testDb);
    const trip = createTrip(testDb, other.id);
    const note = createCollabNote(testDb, trip.id, other.id);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'delete_collab_note', arguments: { tripId: trip.id, noteId: note.id } });
      expect(result.isError).toBe(true);
    });
  });
});