import { describe, test, expect, beforeEach, afterEach, beforeAll, afterAll } from 'bun:test';
import { Database } from 'bun:sqlite';
import { WebhookServer } from '../../src/server';
import { ResponseQueue } from '../../src/services/response-queue';
import { GroupSyncService } from '../../src/services/group-sync';
import { initializeDatabase, ensureUserExists } from '../../src/db';
import { TaskService } from '../../src/tasks/service';

// Simulated ResponseQueue for testing (in-memory array)
let simulatedQueue: any[] = [];
let originalAdd: any;

class SimulatedResponseQueue {
  static async add(responses: any[]) {
    simulatedQueue.push(...responses);
  }

  static getQueue() {
    return simulatedQueue;
  }

  static clear() {
    simulatedQueue = [];
  }
}

// Test database instance
let testDb: Database;

beforeAll(() => {
  // Create in-memory test database
  testDb = new Database(':memory:');
  // Initialize schema
  initializeDatabase(testDb);
  // Guardar implementación original de ResponseQueue.add para restaurar después
  originalAdd = (ResponseQueue as any).add;
});

afterAll(() => {
  (ResponseQueue as any).add = originalAdd;
  // Close the test database
  testDb.close();
});

beforeEach(() => {
  // Clear simulated queue
  SimulatedResponseQueue.clear();
  
  // Replace ResponseQueue with simulated version
  (ResponseQueue as any).add = SimulatedResponseQueue.add;
  
  // Inject testDb for WebhookServer to use
  WebhookServer.dbInstance = testDb;
  
  // Inject testDb for GroupSyncService to use
  GroupSyncService.dbInstance = testDb;

  // Inject testDb for TaskService to use
  (TaskService as any).dbInstance = testDb;
  
  // Ensure database is initialized (recreates tables if dropped)
  initializeDatabase(testDb);
  
  // Reset database state between tests (borrar raíz primero; ON DELETE CASCADE limpia assignments)
  testDb.exec('DELETE FROM response_queue');
  try { testDb.exec('DELETE FROM task_origins'); } catch {}
  testDb.exec('DELETE FROM tasks');
  testDb.exec('DELETE FROM users');
  testDb.exec('DELETE FROM groups');

  // Insert test data for active group
  testDb.exec(`
    INSERT OR IGNORE INTO groups (id, community_id, name, active)
    VALUES ('group-id@g.us', 'test-community', 'Test Group', 1)
  `);

  // Populate active groups cache with test data
  GroupSyncService['cacheActiveGroups']();
});

describe('WebhookServer', () => {
  const envBackup = process.env;

  beforeEach(() => {
    process.env = { 
      ...envBackup, 
      INSTANCE_NAME: 'test-instance',
      NODE_ENV: 'test'
    };
  });

  afterEach(() => {
    process.env = envBackup;
    (ResponseQueue as any).add = originalAdd;
  });

  const createTestRequest = (payload: any) => 
    new Request('http://localhost:3007', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify(payload)
    });

  test('should reject non-POST requests', async () => {
    const request = new Request('http://localhost:3007', { method: 'GET' });
    const response = await WebhookServer.handleRequest(request);
    expect(response.status).toBe(405);
  });

  test('should require JSON content type', async () => {
    const request = new Request('http://localhost:3007', {
      method: 'POST',
      headers: { 'Content-Type': 'text/plain' }
    });
    const response = await WebhookServer.handleRequest(request);
    expect(response.status).toBe(400);
  });

  test('should validate payload structure', async () => {
    const invalidPayloads = [
      {},
      { event: null },
      { event: 'messages.upsert', instance: null }
    ];

    for (const invalidPayload of invalidPayloads) {
      const request = createTestRequest(invalidPayload);
      const response = await WebhookServer.handleRequest(request);
      expect(response.status).toBe(400);
    }
  });

  test('should verify instance name', async () => {
    process.env.TEST_VERIFY_INSTANCE = 'true';
    const payload = {
      event: 'messages.upsert',
      instance: 'wrong-instance',
      data: {}
    };
    const request = createTestRequest(payload);
    const response = await WebhookServer.handleRequest(request);
    expect(response.status).toBe(403);
    delete process.env.TEST_VERIFY_INSTANCE;
  });

  test('should handle valid messages.upsert', async () => {
    const payload = {
      event: 'messages.upsert',
      instance: 'test-instance',
      data: {
        key: {
          remoteJid: 'group-id@g.us',
          participant: 'sender-id@s.whatsapp.net'
        },
        message: { conversation: '/tarea nueva Test' }
      }
    };
    const request = createTestRequest(payload);
    const response = await WebhookServer.handleRequest(request);
    expect(response.status).toBe(200);
    expect(SimulatedResponseQueue.getQueue().length).toBeGreaterThan(0);
  });

  test('should ignore empty message content', async () => {
    const payload = {
      event: 'messages.upsert',
      instance: 'test-instance',
      data: {
        key: {
          remoteJid: 'group-id@g.us',
          participant: 'sender-id@s.whatsapp.net'
        },
        message: { conversation: '' }
      }
    };
    const request = createTestRequest(payload);
    const response = await WebhookServer.handleRequest(request);
    expect(response.status).toBe(200);
    expect(SimulatedResponseQueue.getQueue().length).toBe(0);
  });

  test('should handle very long messages', async () => {
    const longMessage = '/tarea nueva ' + 'A'.repeat(5000);
    const payload = {
      event: 'messages.upsert',
      instance: 'test-instance',
      data: {
        key: {
          remoteJid: 'group-id@g.us',
          participant: 'sender-id@s.whatsapp.net'
        },
        message: { conversation: longMessage }
      }
    };
    const request = createTestRequest(payload);
    const response = await WebhookServer.handleRequest(request);
    expect(response.status).toBe(200);
    expect(SimulatedResponseQueue.getQueue().length).toBeGreaterThan(0);
  });

  test('should handle messages with special characters and emojis', async () => {
    const specialMessage = '/tarea nueva Test 😊 你好 @#$%^&*()';
    const payload = {
      event: 'messages.upsert',
      instance: 'test-instance',
      data: {
        key: {
          remoteJid: 'group-id@g.us',
          participant: 'sender-id@s.whatsapp.net'
        },
        message: { conversation: specialMessage }
      }
    };
    const request = createTestRequest(payload);
    const response = await WebhookServer.handleRequest(request);
    expect(response.status).toBe(200);
    expect(SimulatedResponseQueue.getQueue().length).toBeGreaterThan(0);
  });

  test('should ignore non-/tarea commands', async () => {
    const payload = {
      event: 'messages.upsert',
      instance: 'test-instance',
      data: {
        key: {
          remoteJid: 'group-id@g.us',
          participant: 'sender-id@s.whatsapp.net'
        },
        message: { conversation: '/othercommand test' }
      }
    };
    const request = createTestRequest(payload);
    const response = await WebhookServer.handleRequest(request);
    expect(response.status).toBe(200);
    expect(SimulatedResponseQueue.getQueue().length).toBe(0);
  });

  test('should ignore message with mentions but no command', async () => {
    const payload = {
      event: 'messages.upsert',
      instance: 'test-instance',
      data: {
        key: {
          remoteJid: 'group-id@g.us',
          participant: 'sender-id@s.whatsapp.net'
        },
        message: { 
          conversation: 'Hello everyone!',
          contextInfo: {
            mentionedJid: ['1234567890@s.whatsapp.net']
          }
        }
      }
    };
    const request = createTestRequest(payload);
    const response = await WebhookServer.handleRequest(request);
    expect(response.status).toBe(200);
    expect(SimulatedResponseQueue.getQueue().length).toBe(0);
  });

  test('should ignore media attachment messages', async () => {
    const payload = {
      event: 'messages.upsert',
      instance: 'test-instance',
      data: {
        key: {
          remoteJid: 'group-id@g.us',
          participant: 'sender-id@s.whatsapp.net'
        },
        message: { 
          imageMessage: { caption: 'This is an image' }
        }
      }
    };
    const request = createTestRequest(payload);
    const response = await WebhookServer.handleRequest(request);
    expect(response.status).toBe(200);
    expect(SimulatedResponseQueue.getQueue().length).toBe(0);
  });

  test('should process command from extendedTextMessage', async () => {
    const payload = {
      event: 'messages.upsert',
      instance: 'test-instance',
      data: {
        key: {
          remoteJid: 'group-id@g.us',
          participant: 'sender-id@s.whatsapp.net'
        },
        message: { 
          extendedTextMessage: { text: '/t n Test ext' }
        }
      }
    };
    const request = createTestRequest(payload);
    const response = await WebhookServer.handleRequest(request);
    expect(response.status).toBe(200);
    expect(SimulatedResponseQueue.getQueue().length).toBeGreaterThan(0);
  });

  test('should process command from image caption when caption starts with a command', async () => {
    const payload = {
      event: 'messages.upsert',
      instance: 'test-instance',
      data: {
        key: {
          remoteJid: 'group-id@g.us',
          participant: 'sender-id@s.whatsapp.net'
        },
        message: { 
          imageMessage: { caption: '/t n From caption' }
        }
      }
    };
    const request = createTestRequest(payload);
    const response = await WebhookServer.handleRequest(request);
    expect(response.status).toBe(200);
    expect(SimulatedResponseQueue.getQueue().length).toBeGreaterThan(0);
  });

  test('should handle requests on configured port', async () => {
    const originalPort = process.env.PORT;
    process.env.PORT = '3007';
    // Satisfacer validación de entorno en start()
    const prevEnv = {
      EVOLUTION_API_URL: process.env.EVOLUTION_API_URL,
      EVOLUTION_API_KEY: process.env.EVOLUTION_API_KEY,
      EVOLUTION_API_INSTANCE: process.env.EVOLUTION_API_INSTANCE,
      CHATBOT_PHONE_NUMBER: process.env.CHATBOT_PHONE_NUMBER,
      WEBHOOK_URL: process.env.WEBHOOK_URL
    };
    process.env.EVOLUTION_API_URL = 'http://localhost:3000';
    process.env.EVOLUTION_API_KEY = 'test-key';
    process.env.EVOLUTION_API_INSTANCE = 'test-instance';
    process.env.CHATBOT_PHONE_NUMBER = '9999999999';
    process.env.WEBHOOK_URL = 'http://localhost:3007';
    
    try {
      const server = await WebhookServer.start();
      const response = await fetch('http://localhost:3007/health');
      expect(response.status).toBe(200);
      server.stop();
    } finally {
      process.env.PORT = originalPort;
      process.env.EVOLUTION_API_URL = prevEnv.EVOLUTION_API_URL;
      process.env.EVOLUTION_API_KEY = prevEnv.EVOLUTION_API_KEY;
      process.env.EVOLUTION_API_INSTANCE = prevEnv.EVOLUTION_API_INSTANCE;
      process.env.CHATBOT_PHONE_NUMBER = prevEnv.CHATBOT_PHONE_NUMBER;
      process.env.WEBHOOK_URL = prevEnv.WEBHOOK_URL;
    }
  });

  function getFutureDate(days: number): string {
    const date = new Date();
    date.setDate(date.getDate() + days);
    return date.toISOString().split('T')[0];
  }

  describe('/tarea command logging', () => {
    test('should log basic /tarea command', async () => {
      const payload = {
        event: 'messages.upsert',
        instance: 'test-instance',
        data: {
          key: {
            remoteJid: 'group-id@g.us',
            participant: 'user123@s.whatsapp.net'
          },
          message: { conversation: '/tarea test' }
        }
      };
      
      await WebhookServer.handleRequest(createTestRequest(payload));
      
      // Check that a response was queued (indicating command processing)
      expect(SimulatedResponseQueue.getQueue().length).toBeGreaterThan(0);
    });

    test('should log command with due date', async () => {
      const futureDate = getFutureDate(3); // Get date 3 days in future
      const payload = {
        event: 'messages.upsert',
        instance: 'test-instance',
        data: {
          key: {
            remoteJid: 'group-id@g.us',
            participant: 'user123@s.whatsapp.net'
          },
          message: { 
            conversation: `/tarea nueva Finish project @user2 ${futureDate}`,
            contextInfo: {
              mentionedJid: ['user2@s.whatsapp.net']
            }
          }
        }
      };
      
      await WebhookServer.handleRequest(createTestRequest(payload));
      
      // Verify command processing by checking queue
      expect(SimulatedResponseQueue.getQueue().length).toBeGreaterThan(0);
    });
  });

  test('should handle XSS/SQL injection attempts', async () => {
    const maliciousMessage = `/tarea nueva <script>alert('xss')</script>'; DROP TABLE tasks; --`;
    const payload = {
      event: 'messages.upsert',
      instance: 'test-instance',
      data: {
        key: {
          remoteJid: 'group-id@g.us',
          participant: 'sender-id@s.whatsapp.net'
        },
        message: { conversation: maliciousMessage }
      }
    };
    const request = createTestRequest(payload);
    const response = await WebhookServer.handleRequest(request);
    expect(response.status).toBe(200);
    expect(SimulatedResponseQueue.getQueue().length).toBeGreaterThan(0);
  });

  test('should handle multiple dates in command (use last one as due date)', async () => {
    const futureDate1 = getFutureDate(3);
    const futureDate2 = getFutureDate(5);
    const payload = {
      event: 'messages.upsert',
      instance: 'test-instance',
      data: {
        key: {
          remoteJid: 'group-id@g.us',
          participant: 'sender-id@s.whatsapp.net'
        },
        message: { conversation: `/tarea nueva Test task ${futureDate1} some text ${futureDate2}` }
      }
    };
    
    await WebhookServer.handleRequest(createTestRequest(payload));
    
    expect(SimulatedResponseQueue.getQueue().length).toBeGreaterThan(0);
  });

  test('should ignore past dates as due dates', async () => {
    const pastDate = '2020-01-01';
    const futureDate = getFutureDate(2);
    const payload = {
      event: 'messages.upsert',
      instance: 'test-instance',
      data: {
        key: {
          remoteJid: 'group-id@g.us',
          participant: 'sender-id@s.whatsapp.net'
        },
        message: { conversation: `/tarea nueva Test task ${pastDate} more text ${futureDate}` }
      }
    };
    
    await WebhookServer.handleRequest(createTestRequest(payload));
    
    expect(SimulatedResponseQueue.getQueue().length).toBeGreaterThan(0);
  });

  test('should handle multiple past dates correctly', async () => {
    const pastDate1 = '2020-01-01';
    const pastDate2 = '2021-01-01';
    const payload = {
      event: 'messages.upsert',
      instance: 'test-instance',
      data: {
        key: {
          remoteJid: 'group-id@g.us',
          participant: 'sender-id@s.whatsapp.net'
        },
        message: { conversation: `/tarea nueva Test task ${pastDate1} and ${pastDate2}` }
      }
    };
    
    await WebhookServer.handleRequest(createTestRequest(payload));
    
    expect(SimulatedResponseQueue.getQueue().length).toBeGreaterThan(0);
  });

  test('should handle mixed valid and invalid date formats', async () => {
    const futureDate = getFutureDate(2);
    const payload = {
      event: 'messages.upsert',
      instance: 'test-instance',
      data: {
        key: {
          remoteJid: 'group-id@g.us',
          participant: 'sender-id@s.whatsapp.net'
        },
        message: { conversation: `/tarea nueva Test task 2023-13-01 (invalid) ${futureDate} 25/12/2023 (invalid)` }
      }
    };
    
    await WebhookServer.handleRequest(createTestRequest(payload));
    
    expect(SimulatedResponseQueue.getQueue().length).toBeGreaterThan(0);
  });

  test('should normalize sender ID before processing', async () => {
    const payload = {
      event: 'messages.upsert',
      instance: 'test-instance',
      data: {
        key: {
          remoteJid: 'group-id@g.us',
          participant: '1234567890:12@s.whatsapp.net' // ID with participant
        },
        message: { conversation: '/tarea nueva Test' }
      }
    };
    const request = createTestRequest(payload);
    const response = await WebhookServer.handleRequest(request);
    expect(response.status).toBe(200);
    expect(SimulatedResponseQueue.getQueue().length).toBeGreaterThan(0);
  });

  test('should ignore messages with invalid sender ID', async () => {
    const payload = {
      event: 'messages.upsert',
      instance: 'test-instance',
      data: {
        key: {
          remoteJid: 'group-id@g.us',
          participant: 'invalid-id!' // Invalid ID
        },
        message: { conversation: '/tarea nueva Test' }
      }
    };
    const request = createTestRequest(payload);
    const response = await WebhookServer.handleRequest(request);
    expect(response.status).toBe(200);
    expect(SimulatedResponseQueue.getQueue().length).toBe(0);
  });

  test('should ensure user exists and use normalized ID', async () => {
    const payload = {
      event: 'messages.upsert',
      instance: 'test-instance',
      data: {
        key: {
          remoteJid: 'group-id@g.us',
          participant: '1234567890@s.whatsapp.net'
        },
        message: { conversation: '/tarea nueva Test' }
      }
    };
    const request = createTestRequest(payload);
    const response = await WebhookServer.handleRequest(request);
    expect(response.status).toBe(200);
    expect(SimulatedResponseQueue.getQueue().length).toBeGreaterThan(0);
    
    // Verify user was created in real database
    const user = testDb.query("SELECT * FROM users WHERE id = ?").get('1234567890');
    expect(user).toBeDefined();
    expect(user.id).toBe('1234567890');
  });

  test('should ignore messages if user creation fails', async () => {
    const payload = {
      event: 'messages.upsert',
      instance: 'test-instance',
      data: {
        key: {
          remoteJid: 'group-id@g.us',
          participant: null // Invalid participant
        },
        message: { conversation: '/tarea nueva Test' }
      }
    };
    const request = createTestRequest(payload);
    const response = await WebhookServer.handleRequest(request);
    expect(response.status).toBe(200);
    expect(SimulatedResponseQueue.getQueue().length).toBe(0);
    
    // Verify no user was created
    const userCount = testDb.query("SELECT COUNT(*) as count FROM users").get();
    expect(userCount.count).toBe(0);
  });

  // Integration tests with real database
  describe('User validation in handleMessageUpsert', () => {
    test('should proceed with valid user', async () => {
      const payload = {
        event: 'messages.upsert',
        instance: 'test-instance',
        data: {
          key: {
            remoteJid: 'group-id@g.us',
            participant: '1234567890@s.whatsapp.net'
          },
          message: { conversation: '/tarea nueva Test' }
        }
      };
      const request = createTestRequest(payload);
      const response = await WebhookServer.handleRequest(request);
      expect(response.status).toBe(200);
      expect(SimulatedResponseQueue.getQueue().length).toBeGreaterThan(0);
      
      // Verify user was created in real database
      const user = testDb.query("SELECT * FROM users WHERE id = ?").get('1234567890');
      expect(user).toBeDefined();
      expect(user.id).toBe('1234567890');
    });

    test('should ignore message if user validation fails', async () => {
      const payload = {
        event: 'messages.upsert',
        instance: 'test-instance',
        data: {
          key: {
            remoteJid: 'group-id@g.us',
            participant: 'invalid!user@s.whatsapp.net'
          },
          message: { conversation: '/tarea nueva Test' }
        }
      };
      const request = createTestRequest(payload);
      const response = await WebhookServer.handleRequest(request);
      expect(response.status).toBe(200);
      expect(SimulatedResponseQueue.getQueue().length).toBe(0);
      
      // Verify no user was created
      const userCount = testDb.query("SELECT COUNT(*) as count FROM users").get();
      expect(userCount.count).toBe(0);
    });

    test('should handle database errors during user validation', async () => {
      // Force a database error by corrupting the database state
      testDb.exec('DROP TABLE users');
      
      const payload = {
        event: 'messages.upsert',
        instance: 'test-instance',
        data: {
          key: {
            remoteJid: 'group-id@g.us',
            participant: '1234567890@s.whatsapp.net'
          },
          message: { conversation: '/tarea nueva Test' }
        }
      };
      const request = createTestRequest(payload);
      const response = await WebhookServer.handleRequest(request);
      expect(response.status).toBe(200);
      expect(SimulatedResponseQueue.getQueue().length).toBe(0);
      
      // Reinitialize database for subsequent tests (force full migration)
      testDb.exec('DROP TABLE IF EXISTS schema_migrations');
      initializeDatabase(testDb);
    });

    test('should integrate user validation completely in handleMessageUpsert with valid user', async () => {
      const payload = {
        event: 'messages.upsert',
        instance: 'test-instance',
        data: {
          key: {
            remoteJid: 'group-id@g.us',
            participant: '1234567890@s.whatsapp.net'
          },
          message: { conversation: '/tarea nueva Test' }
        }
      };
      const request = createTestRequest(payload);
      const response = await WebhookServer.handleRequest(request);
      expect(response.status).toBe(200);
      expect(SimulatedResponseQueue.getQueue().length).toBeGreaterThan(0);
      
      // Verify user was created/updated in database
      const user = testDb.query("SELECT * FROM users WHERE id = ?").get('1234567890');
      expect(user).toBeDefined();
      expect(user.id).toBe('1234567890');
      expect(user.first_seen).toBeDefined();
      expect(user.last_seen).toBeDefined();
    });

    test('should use normalized ID in command service', async () => {
      const payload = {
        event: 'messages.upsert',
        instance: 'test-instance',
        data: {
          key: {
            remoteJid: 'group-id@g.us',
            participant: '1234567890:12@s.whatsapp.net' // Raw ID with participant
          },
          message: { conversation: '/tarea nueva Test' }
        }
      };
      
      const request = createTestRequest(payload);
      await WebhookServer.handleRequest(request);
      
      // Verify that a response was queued, indicating command processing
      expect(SimulatedResponseQueue.getQueue().length).toBeGreaterThan(0);
    });

    test('should handle end-to-end flow with valid user and command processing', async () => {
      const payload = {
        event: 'messages.upsert',
        instance: 'test-instance',
        data: {
          key: {
            remoteJid: 'group-id@g.us',
            participant: '1234567890@s.whatsapp.net'
          },
          message: { conversation: '/tarea nueva Test task' }
        }
      };
      
      const request = createTestRequest(payload);
      const response = await WebhookServer.handleRequest(request);
      expect(response.status).toBe(200);
      
      // Verify user was created/updated
      const user = testDb.query("SELECT * FROM users WHERE id = ?").get('1234567890');
      expect(user).toBeDefined();
      
      // Verify that a response was queued
      expect(SimulatedResponseQueue.getQueue().length).toBeGreaterThan(0);
    });
  });

  describe('Group validation in handleMessageUpsert', () => {
    test('should ignore messages from inactive groups', async () => {
      // Insert inactive group
      testDb.exec(`
        INSERT OR REPLACE INTO groups (id, community_id, name, active)
        VALUES ('inactive-group@g.us', 'test-community', 'Inactive Group', 0)
      `);

      const payload = {
        event: 'messages.upsert',
        instance: 'test-instance',
        data: {
          key: {
            remoteJid: 'inactive-group@g.us',
            participant: '1234567890@s.whatsapp.net'
          },
          message: { conversation: '/tarea nueva Test' }
        }
      };
      const request = createTestRequest(payload);
      const response = await WebhookServer.handleRequest(request);
      expect(response.status).toBe(200);
      expect(SimulatedResponseQueue.getQueue().length).toBe(0);
    });

    test('should proceed with messages from active groups', async () => {
      const payload = {
        event: 'messages.upsert',
        instance: 'test-instance',
        data: {
          key: {
            remoteJid: 'group-id@g.us',
            participant: '1234567890@s.whatsapp.net'
          },
          message: { conversation: '/tarea nueva Test' }
        }
      };
      const request = createTestRequest(payload);
      const response = await WebhookServer.handleRequest(request);
      expect(response.status).toBe(200);
      expect(SimulatedResponseQueue.getQueue().length).toBeGreaterThan(0);
    });

    test('should accept /t alias and process command', async () => {
      const payload = {
        event: 'messages.upsert',
        instance: 'test-instance',
        data: {
          key: {
            remoteJid: 'group-id@g.us',
            participant: '1234567890@s.whatsapp.net'
          },
          message: { conversation: '/t n Tarea alias hoy' }
        }
      };
      const request = createTestRequest(payload);
      const response = await WebhookServer.handleRequest(request);
      expect(response.status).toBe(200);
      expect(SimulatedResponseQueue.getQueue().length).toBeGreaterThan(0);
    });

    test('should never send responses to the group (DM only policy)', async () => {
      const payload = {
        event: 'messages.upsert',
        instance: 'test-instance',
        data: {
          key: {
            remoteJid: 'group-id@g.us',
            participant: '1234567890@s.whatsapp.net'
          },
          message: { conversation: '/t n Probar silencio grupo mañana' }
        }
      };
      const request = createTestRequest(payload);
      await WebhookServer.handleRequest(request);

      const out = SimulatedResponseQueue.getQueue();
      expect(out.length).toBeGreaterThan(0);
      for (const r of out) {
        expect(r.recipient.endsWith('@g.us')).toBe(false);
      }
    });
  });

  describe('Advanced listings via WebhookServer', () => {
    test('should process "/t ver sin" in group as DM-only with pagination line', async () => {
      // 12 sin dueño en el grupo activo
      for (let i = 1; i <= 12; i++) {
        TaskService.createTask({
          description: `Sin dueño ${i}`,
          due_date: '2025-12-31',
          group_id: 'group-id@g.us',
          created_by: '9999999999',
        });
      }
      // 2 asignadas (no deben aparecer en "sin")
      TaskService.createTask({
        description: 'Asignada 1',
        due_date: '2025-10-10',
        group_id: 'group-id@g.us',
        created_by: '1111111111',
      }, [{ user_id: '1234567890', assigned_by: '1111111111' }]);

      TaskService.createTask({
        description: 'Asignada 2',
        due_date: '2025-10-11',
        group_id: 'group-id@g.us',
        created_by: '1111111111',
      }, [{ user_id: '1234567890', assigned_by: '1111111111' }]);

      const payload = {
        event: 'messages.upsert',
        instance: 'test-instance',
        data: {
          key: {
            remoteJid: 'group-id@g.us',
            participant: '1234567890@s.whatsapp.net'
          },
          message: { conversation: '/t ver sin' }
        }
      };
      const response = await WebhookServer.handleRequest(createTestRequest(payload));
      expect(response.status).toBe(200);

      const out = SimulatedResponseQueue.getQueue();
      expect(out.length).toBeGreaterThan(0);
      for (const r of out) {
        expect(r.recipient.endsWith('@g.us')).toBe(false);
      }
      const msg = out.map(x => x.message).join('\n');
      expect(msg).toContain('sin responsable');
      expect(msg).toContain('… y 2 más');
    });

    test('should process "/t ver sin" in DM returning instruction', async () => {
      const payload = {
        event: 'messages.upsert',
        instance: 'test-instance',
        data: {
          key: {
            remoteJid: '1234567890@s.whatsapp.net', // DM
            participant: '1234567890@s.whatsapp.net'
          },
          message: { conversation: '/t ver sin' }
        }
      };
      const response = await WebhookServer.handleRequest(createTestRequest(payload));
      expect(response.status).toBe(200);

      const out = SimulatedResponseQueue.getQueue();
      expect(out.length).toBeGreaterThan(0);
      const msg = out.map(x => x.message).join('\n');
      expect(msg).toContain('Este comando se usa en grupos');
    });

    test('should process "/t ver todos" in group showing "Tus tareas" + "Sin dueño (grupo actual)" with pagination in unassigned section', async () => {
      // Tus tareas (2 asignadas)
      TaskService.createTask({
        description: 'Mi Tarea 1',
        due_date: '2025-10-10',
        group_id: 'group-id@g.us',
        created_by: '2222222222',
      }, [{ user_id: '1234567890', assigned_by: '2222222222' }]);

      TaskService.createTask({
        description: 'Mi Tarea 2',
        due_date: '2025-10-11',
        group_id: 'group-id@g.us',
        created_by: '2222222222',
      }, [{ user_id: '1234567890', assigned_by: '2222222222' }]);

      // 12 sin dueño para provocar paginación
      for (let i = 1; i <= 12; i++) {
        TaskService.createTask({
          description: `Sin dueño ${i}`,
          due_date: '2025-12-31',
          group_id: 'group-id@g.us',
          created_by: '9999999999',
        });
      }

      const payload = {
        event: 'messages.upsert',
        instance: 'test-instance',
        data: {
          key: {
            remoteJid: 'group-id@g.us',
            participant: '1234567890@s.whatsapp.net'
          },
          message: { conversation: '/t ver todos' }
        }
      };
      const response = await WebhookServer.handleRequest(createTestRequest(payload));
      expect(response.status).toBe(200);

      const out = SimulatedResponseQueue.getQueue();
      expect(out.length).toBeGreaterThan(0);
      const msg = out.map(x => x.message).join('\n');
      expect(msg).toContain('Tus tareas');
      expect(msg).toContain('sin responsable');
      expect(msg).toContain('… y 2 más');
    });

    test('should process "/t ver todos" in DM showing "Tus tareas" + instructive note', async () => {
      TaskService.createTask({
        description: 'Mi Tarea A',
        due_date: '2025-11-20',
        group_id: 'group-2@g.us',
        created_by: '1111111111',
      }, [{ user_id: '1234567890', assigned_by: '1111111111' }]);

      const payload = {
        event: 'messages.upsert',
        instance: 'test-instance',
        data: {
          key: {
            remoteJid: '1234567890@s.whatsapp.net', // DM
            participant: '1234567890@s.whatsapp.net'
          },
          message: { conversation: '/t ver todos' }
        }
      };
      const response = await WebhookServer.handleRequest(createTestRequest(payload));
      expect(response.status).toBe(200);

      const out = SimulatedResponseQueue.getQueue();
      expect(out.length).toBeGreaterThan(0);
      const msg = out.map(x => x.message).join('\n');
      expect(msg).toContain('Tus tareas');
      expect(msg).toContain('ℹ️ Para ver tareas sin responsable');
    });
  });
});