/**
 * Unit tests for MCP vacay tools (vacay addon-gated, VacayMcp — DI-discovered
 * via the hand-built test registry in tests/helpers/mcp-test-controllers.ts):
 * get_vacay_plan, update_vacay_plan, set_vacay_color,
 * list_vacay_years, add_vacay_year, delete_vacay_year,
 * get_vacay_entries, toggle_vacay_entry, toggle_company_holiday,
 * get_vacay_stats, update_vacay_stats,
 * add_holiday_calendar, update_holiday_calendar, delete_holiday_calendar,
 * list_holiday_countries, list_holidays.
 * Resources: trek://vacay/plan, trek://vacay/entries/{year},
 * trek://vacay/holidays/{year} — these ride the registry too (attached inside
 * registerTools), so `withTools` must stay on even for resource reads.
 */
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 } = vi.hoisted(() => ({ broadcastMock: vi.fn() }));
vi.mock('../../../src/websocket', () => ({ broadcast: broadcastMock }));

// share_vacay_calendar fires a user notification after inserting; stub it out
vi.mock('../../../src/nest/notifications/notifications.bridge', () => ({ send: vi.fn().mockResolvedValue(undefined) }));

import { createTables } from '../../../src/db/schema';
import { runMigrations } from '../../../src/db/migrations';
import { resetTestDb } from '../../helpers/test-db';
import { createUser } from '../../helpers/factories';
import { setAddonEnabled } from '../../helpers/test-db';
import { ADDON_IDS } from '../../../src/addons';
import { createMcpHarness, parseToolResult, parseResourceResult, type McpHarness } from '../../helpers/mcp-harness';
import { VacayService } from '../../../src/nest/vacay/vacay.service';

// Stub the async methods that make external calls (VacayService is DI-native;
// the registry constructs a real instance, so spy on the prototype — the
// successor of the legacy path-level partial mock of services/vacayService).
vi.spyOn(VacayService.prototype, 'updatePlan').mockResolvedValue({
  plan: { id: 1, block_weekends: true, holidays_enabled: false, company_holidays_enabled: false, carry_over_enabled: false, holiday_calendars: [] },
} as never);
vi.spyOn(VacayService.prototype, 'getCountries').mockResolvedValue({ data: [{ code: 'US', name: 'United States' }] });
vi.spyOn(VacayService.prototype, 'getHolidays').mockResolvedValue({ data: [{ date: '2025-01-01', name: 'New Year' }] });

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

beforeEach(() => {
  resetTestDb(testDb);
  // The `when:` gate reads the injected AddonsService, so the toggle is the row
  // the admin panel writes — and this addon ships disabled by default.
  setAddonEnabled(testDb, ADDON_IDS.VACAY, true);
  broadcastMock.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(); }
}

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

// ---------------------------------------------------------------------------
// get_vacay_plan
// ---------------------------------------------------------------------------

describe('Tool: get_vacay_plan', () => {
  it('returns plan data object', async () => {
    const { user } = createUser(testDb);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'get_vacay_plan', arguments: {} });
      const data = parseToolResult(result) as any;
      expect(data.plan).toBeDefined();
    });
  });
});

// ---------------------------------------------------------------------------
// update_vacay_plan
// ---------------------------------------------------------------------------

describe('Tool: update_vacay_plan', () => {
  it('calls updatePlan and returns the hydrated plan', async () => {
    const { user } = createUser(testDb);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({
        name: 'update_vacay_plan',
        arguments: { block_weekends: true, holidays_enabled: false },
      });
      const data = parseToolResult(result) as any;
      // Now returns the fully-hydrated plan (matching get_vacay_plan), not { success }.
      expect(data.plan).toBeDefined();
      expect(data.plan.block_weekends).toBe(true);
      expect(data.plan.holidays_enabled).toBe(false);
      expect(Array.isArray(data.plan.holiday_calendars)).toBe(true);
    });
  });

  it('blocks demo user', async () => {
    process.env.DEMO_MODE = 'true';
    const { user } = createUser(testDb, { email: 'demo@nomad.app' });
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'update_vacay_plan', arguments: { block_weekends: true } });
      expect(result.isError).toBe(true);
    });
  });
});

// ---------------------------------------------------------------------------
// set_vacay_color
// ---------------------------------------------------------------------------

describe('Tool: set_vacay_color', () => {
  it('updates color and returns success', async () => {
    const { user } = createUser(testDb);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'set_vacay_color', arguments: { color: '#ff0000' } });
      const data = parseToolResult(result) as any;
      expect(data.success).toBe(true);
      expect(data.color).toBe('#ff0000'); // echoes the persisted color
    });
  });

  it('blocks demo user', async () => {
    process.env.DEMO_MODE = 'true';
    const { user } = createUser(testDb, { email: 'demo@nomad.app' });
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'set_vacay_color', arguments: { color: '#ff0000' } });
      expect(result.isError).toBe(true);
    });
  });
});

// ---------------------------------------------------------------------------
// list_vacay_years
// ---------------------------------------------------------------------------

describe('Tool: list_vacay_years', () => {
  it('returns years array', async () => {
    const { user } = createUser(testDb);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'list_vacay_years', arguments: {} });
      const data = parseToolResult(result) as any;
      expect(Array.isArray(data.years)).toBe(true);
    });
  });
});

// ---------------------------------------------------------------------------
// add_vacay_year
// ---------------------------------------------------------------------------

describe('Tool: add_vacay_year', () => {
  it('adds year to list', async () => {
    const { user } = createUser(testDb);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'add_vacay_year', arguments: { year: 2025 } });
      const data = parseToolResult(result) as any;
      expect(Array.isArray(data.years)).toBe(true);
      expect(data.years).toContain(2025);
    });
  });

  it('blocks demo user', async () => {
    process.env.DEMO_MODE = 'true';
    const { user } = createUser(testDb, { email: 'demo@nomad.app' });
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'add_vacay_year', arguments: { year: 2025 } });
      expect(result.isError).toBe(true);
    });
  });
});

// ---------------------------------------------------------------------------
// delete_vacay_year
// ---------------------------------------------------------------------------

describe('Tool: delete_vacay_year', () => {
  it('removes year from list', async () => {
    const { user } = createUser(testDb);
    await withHarness(user.id, async (h) => {
      // Add year first
      await h.client.callTool({ name: 'add_vacay_year', arguments: { year: 2025 } });
      const result = await h.client.callTool({ name: 'delete_vacay_year', arguments: { year: 2025 } });
      const data = parseToolResult(result) as any;
      expect(Array.isArray(data.years)).toBe(true);
      expect(data.years).not.toContain(2025);
    });
  });

  it('blocks demo user', async () => {
    process.env.DEMO_MODE = 'true';
    const { user } = createUser(testDb, { email: 'demo@nomad.app' });
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'delete_vacay_year', arguments: { year: 2025 } });
      expect(result.isError).toBe(true);
    });
  });
});

// ---------------------------------------------------------------------------
// get_vacay_entries
// ---------------------------------------------------------------------------

describe('Tool: get_vacay_entries', () => {
  it('returns entries array (empty initially)', async () => {
    const { user } = createUser(testDb);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'get_vacay_entries', arguments: { year: 2025 } });
      const data = parseToolResult(result) as any;
      expect(data.entries).toBeDefined();
      expect(Array.isArray(data.entries.entries)).toBe(true);
    });
  });
});

// ---------------------------------------------------------------------------
// toggle_vacay_entry
// ---------------------------------------------------------------------------

describe('Tool: toggle_vacay_entry', () => {
  it('toggles entry and returns action', async () => {
    const { user } = createUser(testDb);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'toggle_vacay_entry', arguments: { date: '2025-06-15' } });
      const data = parseToolResult(result) as any;
      expect(data.action).toBeDefined();
    });
  });

  it('blocks demo user', async () => {
    process.env.DEMO_MODE = 'true';
    const { user } = createUser(testDb, { email: 'demo@nomad.app' });
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'toggle_vacay_entry', arguments: { date: '2025-06-15' } });
      expect(result.isError).toBe(true);
    });
  });
});

// ---------------------------------------------------------------------------
// toggle_company_holiday
// ---------------------------------------------------------------------------

describe('Tool: toggle_company_holiday', () => {
  it('toggles company holiday and returns action', async () => {
    const { user } = createUser(testDb);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({
        name: 'toggle_company_holiday',
        arguments: { date: '2025-12-25', note: 'Christmas' },
      });
      const data = parseToolResult(result) as any;
      expect(data.action).toBeDefined();
    });
  });

  it('blocks demo user', async () => {
    process.env.DEMO_MODE = 'true';
    const { user } = createUser(testDb, { email: 'demo@nomad.app' });
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'toggle_company_holiday', arguments: { date: '2025-12-25' } });
      expect(result.isError).toBe(true);
    });
  });
});

// ---------------------------------------------------------------------------
// get_vacay_stats
// ---------------------------------------------------------------------------

describe('Tool: get_vacay_stats', () => {
  it('returns stats object', async () => {
    const { user } = createUser(testDb);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'get_vacay_stats', arguments: { year: 2025 } });
      const data = parseToolResult(result) as any;
      expect(data.stats).toBeDefined();
    });
  });
});

// ---------------------------------------------------------------------------
// update_vacay_stats
// ---------------------------------------------------------------------------

describe('Tool: update_vacay_stats', () => {
  it('updates vacation days allowance and returns success', async () => {
    const { user } = createUser(testDb);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'update_vacay_stats', arguments: { year: 2025, vacationDays: 25 } });
      const data = parseToolResult(result) as any;
      expect(data.success).toBe(true);
    });
  });

  it('blocks demo user', async () => {
    process.env.DEMO_MODE = 'true';
    const { user } = createUser(testDb, { email: 'demo@nomad.app' });
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'update_vacay_stats', arguments: { year: 2025, vacationDays: 20 } });
      expect(result.isError).toBe(true);
    });
  });
});

// ---------------------------------------------------------------------------
// add_holiday_calendar
// ---------------------------------------------------------------------------

describe('Tool: add_holiday_calendar', () => {
  it('inserts calendar row and returns calendar', async () => {
    const { user } = createUser(testDb);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({
        name: 'add_holiday_calendar',
        arguments: { region: 'US', label: 'US Holidays', color: '#ff0000' },
      });
      const data = parseToolResult(result) as any;
      expect(data.calendar).toBeDefined();
      expect(data.calendar.region).toBe('US');
    });
  });

  it('blocks demo user', async () => {
    process.env.DEMO_MODE = 'true';
    const { user } = createUser(testDb, { email: 'demo@nomad.app' });
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'add_holiday_calendar', arguments: { region: 'US' } });
      expect(result.isError).toBe(true);
    });
  });
});

// ---------------------------------------------------------------------------
// update_holiday_calendar
// ---------------------------------------------------------------------------

describe('Tool: update_holiday_calendar', () => {
  it('updates label and color', async () => {
    const { user } = createUser(testDb);
    await withHarness(user.id, async (h) => {
      // First add a calendar
      const addResult = await h.client.callTool({
        name: 'add_holiday_calendar',
        arguments: { region: 'DE', label: 'Germany' },
      });
      const added = parseToolResult(addResult) as any;
      const calId = added.calendar.id;

      const result = await h.client.callTool({
        name: 'update_holiday_calendar',
        arguments: { calendarId: calId, label: 'German Holidays', color: '#00ff00' },
      });
      const data = parseToolResult(result) as any;
      expect(data.calendar).toBeDefined();
      expect(data.calendar.label).toBe('German Holidays');
    });
  });

  it('blocks demo user', async () => {
    process.env.DEMO_MODE = 'true';
    const { user } = createUser(testDb, { email: 'demo@nomad.app' });
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'update_holiday_calendar', arguments: { calendarId: 1, label: 'X' } });
      expect(result.isError).toBe(true);
    });
  });
});

// ---------------------------------------------------------------------------
// delete_holiday_calendar
// ---------------------------------------------------------------------------

describe('Tool: delete_holiday_calendar', () => {
  it('removes calendar and returns success', async () => {
    const { user } = createUser(testDb);
    await withHarness(user.id, async (h) => {
      const addResult = await h.client.callTool({
        name: 'add_holiday_calendar',
        arguments: { region: 'FR' },
      });
      const added = parseToolResult(addResult) as any;
      const calId = added.calendar.id;

      const result = await h.client.callTool({ name: 'delete_holiday_calendar', arguments: { calendarId: calId } });
      const data = parseToolResult(result) as any;
      expect(data.success).toBe(true);
    });
  });

  it('blocks demo user', async () => {
    process.env.DEMO_MODE = 'true';
    const { user } = createUser(testDb, { email: 'demo@nomad.app' });
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'delete_holiday_calendar', arguments: { calendarId: 1 } });
      expect(result.isError).toBe(true);
    });
  });
});

// ---------------------------------------------------------------------------
// list_holiday_countries
// ---------------------------------------------------------------------------

describe('Tool: list_holiday_countries', () => {
  it('returns countries from mocked service', async () => {
    const { user } = createUser(testDb);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'list_holiday_countries', arguments: {} });
      const data = parseToolResult(result) as any;
      expect(data.countries).toBeDefined();
    });
  });
});

// ---------------------------------------------------------------------------
// list_holidays
// ---------------------------------------------------------------------------

describe('Tool: list_holidays', () => {
  it('returns holidays from mocked service', async () => {
    const { user } = createUser(testDb);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'list_holidays', arguments: { country: 'US', year: 2025 } });
      const data = parseToolResult(result) as any;
      expect(data.holidays).toBeDefined();
    });
  });
});

// ---------------------------------------------------------------------------
// list_vacay_shares
// ---------------------------------------------------------------------------

describe('Tool: list_vacay_shares', () => {
  it('returns outgoing and incoming shares', async () => {
    const { user } = createUser(testDb);
    const { user: other } = createUser(testDb);
    await withHarness(user.id, async (h) => {
      await h.client.callTool({ name: 'share_vacay_calendar', arguments: { targetUserId: other.id } });
      const result = await h.client.callTool({ name: 'list_vacay_shares', arguments: {} });
      const data = parseToolResult(result) as any;
      expect(Array.isArray(data.outgoing)).toBe(true);
      expect(Array.isArray(data.incoming)).toBe(true);
      expect(data.outgoing).toHaveLength(1);
      expect(data.outgoing[0].user_id).toBe(other.id);
    });
  });
});

// ---------------------------------------------------------------------------
// share_vacay_calendar
// ---------------------------------------------------------------------------

describe('Tool: share_vacay_calendar', () => {
  it('creates a share and returns success', async () => {
    const { user } = createUser(testDb);
    const { user: other } = createUser(testDb);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'share_vacay_calendar', arguments: { targetUserId: other.id } });
      const data = parseToolResult(result) as any;
      expect(data.success).toBe(true);
      const row = testDb.prepare('SELECT id FROM vacay_shares WHERE owner_id = ? AND user_id = ?').get(user.id, other.id);
      expect(row).toBeDefined();
    });
  });

  it('errors when sharing with yourself', async () => {
    const { user } = createUser(testDb);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'share_vacay_calendar', arguments: { targetUserId: user.id } });
      expect(result.isError).toBe(true);
    });
  });

  it('blocks demo user', async () => {
    process.env.DEMO_MODE = 'true';
    const { user } = createUser(testDb, { email: 'demo@nomad.app' });
    const { user: other } = createUser(testDb);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'share_vacay_calendar', arguments: { targetUserId: other.id } });
      expect(result.isError).toBe(true);
    });
  });
});

// ---------------------------------------------------------------------------
// unshare_vacay_calendar
// ---------------------------------------------------------------------------

describe('Tool: unshare_vacay_calendar', () => {
  it('removes an existing share and returns success', async () => {
    const { user } = createUser(testDb);
    const { user: other } = createUser(testDb);
    await withHarness(user.id, async (h) => {
      await h.client.callTool({ name: 'share_vacay_calendar', arguments: { targetUserId: other.id } });
      const shareId = (testDb.prepare('SELECT id FROM vacay_shares WHERE owner_id = ?').get(user.id) as any).id;

      const result = await h.client.callTool({ name: 'unshare_vacay_calendar', arguments: { shareId } });
      const data = parseToolResult(result) as any;
      expect(data.success).toBe(true);
      expect(testDb.prepare('SELECT id FROM vacay_shares WHERE id = ?').get(shareId)).toBeUndefined();
    });
  });

  it('errors when the share does not exist', async () => {
    const { user } = createUser(testDb);
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'unshare_vacay_calendar', arguments: { shareId: 99999 } });
      expect(result.isError).toBe(true);
    });
  });

  it('blocks demo user', async () => {
    process.env.DEMO_MODE = 'true';
    const { user } = createUser(testDb, { email: 'demo@nomad.app' });
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'unshare_vacay_calendar', arguments: { shareId: 1 } });
      expect(result.isError).toBe(true);
    });
  });
});

// ---------------------------------------------------------------------------
// get_shared_vacay_calendars
// ---------------------------------------------------------------------------

describe('Tool: get_shared_vacay_calendars', () => {
  it('returns the sharer entries for the viewer', async () => {
    const { user: owner } = createUser(testDb);
    const { user: viewer } = createUser(testDb);
    await withHarness(owner.id, async (h) => {
      await h.client.callTool({ name: 'toggle_vacay_entry', arguments: { date: '2025-06-15' } });
      await h.client.callTool({ name: 'share_vacay_calendar', arguments: { targetUserId: viewer.id } });
    });
    await withHarness(viewer.id, async (h) => {
      const result = await h.client.callTool({ name: 'get_shared_vacay_calendars', arguments: { year: 2025 } });
      const data = parseToolResult(result) as any;
      expect(Array.isArray(data.calendars)).toBe(true);
      expect(data.calendars).toHaveLength(1);
      expect(data.calendars[0].owner_id).toBe(owner.id);
      expect(data.calendars[0].entries.map((e: any) => e.date)).toContain('2025-06-15');
    });
  });
});

// ---------------------------------------------------------------------------
// Resources
// ---------------------------------------------------------------------------

describe('Resource: trek://vacay/plan', () => {
  it('returns plan data', async () => {
    const { user } = createUser(testDb);
    await withResourceHarness(user.id, async (h) => {
      const result = await h.client.readResource({ uri: 'trek://vacay/plan' });
      const data = parseResourceResult(result) as any;
      expect(data).toBeDefined();
    });
  });
});

describe('Resource: trek://vacay/entries/{year}', () => {
  it('returns entries for a year', async () => {
    const { user } = createUser(testDb);
    await withResourceHarness(user.id, async (h) => {
      const result = await h.client.readResource({ uri: 'trek://vacay/entries/2025' });
      const data = parseResourceResult(result) as any;
      expect(data).toBeDefined();
      expect(Array.isArray(data.entries)).toBe(true);
    });
  });
});

describe('Resource: trek://vacay/holidays/{year}', () => {
  it('returns [] while public holidays are disabled or no region is set', async () => {
    const { user } = createUser(testDb);
    await withResourceHarness(user.id, async (h) => {
      const result = await h.client.readResource({ uri: 'trek://vacay/holidays/2025' });
      const data = parseResourceResult(result) as unknown[];
      expect(data).toEqual([]);
    });
  });
});

// ---------------------------------------------------------------------------
// decline_vacay_invite (demo guard added by the vacay quirk-fix commit — the
// legacy registrar was the only vacay write without it)
// ---------------------------------------------------------------------------

describe('Tool: decline_vacay_invite', () => {
  it('declines a pending invite', async () => {
    const { user: owner } = createUser(testDb);
    const { user: invitee } = createUser(testDb);
    await withHarness(owner.id, async (h) => {
      await h.client.callTool({ name: 'send_vacay_invite', arguments: { targetUserId: invitee.id } });
    });
    await withHarness(invitee.id, async (h) => {
      const result = await h.client.callTool({ name: 'decline_vacay_invite', arguments: { planId: testDb.prepare('SELECT plan_id FROM vacay_plan_members WHERE user_id = ?').get(invitee.id)!.plan_id } });
      const data = parseToolResult(result) as any;
      expect(data.success).toBe(true);
    });
  });

  it('blocks demo user', async () => {
    process.env.DEMO_MODE = 'true';
    const { user } = createUser(testDb, { email: 'demo@nomad.app' });
    await withHarness(user.id, async (h) => {
      const result = await h.client.callTool({ name: 'decline_vacay_invite', arguments: { planId: 1 } });
      expect(result.isError).toBe(true);
    });
  });
});