import { describe, test, expect, beforeEach, afterEach, beforeAll, afterAll, mock } 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 } from '../../src/db';

// Mock the ResponseQueue
let mockAdd: any;

// Test database instance
let testDb: Database;

beforeAll(() => {
  // Create in-memory test database
  testDb = new Database(':memory:');
  // Initialize schema
  initializeDatabase(testDb);
});

afterAll(() => {
  // Close the test database
  testDb.close();
});

beforeEach(() => {
  mockAdd = mock(() => Promise.resolve());
  ResponseQueue.add = mockAdd;
  
  // Inject testDb for WebhookServer to use
  WebhookServer.dbInstance = testDb;
  
  // Ensure database is initialized (recreates tables if dropped)
  initializeDatabase(testDb);
  
  // Reset database state between tests
  testDb.exec('DELETE FROM task_assignments');
  testDb.exec('DELETE FROM tasks');
  testDb.exec('DELETE FROM users');
  testDb.exec('DELETE FROM groups');

  // Mock GroupSyncService.isGroupActive to return true by default
  mock(GroupSyncService.isGroupActive).mockReturnValue(true);
});

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

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

  afterEach(() => {
    process.env = envBackup;
  });

  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(mockAdd).toHaveBeenCalled();
  });

  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(mockAdd).not.toHaveBeenCalled();
  });

  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(mockAdd).toHaveBeenCalled();
  });

  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(mockAdd).toHaveBeenCalled();
  });

  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(mockAdd).not.toHaveBeenCalled();
  });

  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(mockAdd).not.toHaveBeenCalled();
  });

  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(mockAdd).not.toHaveBeenCalled();
  });

  test('should handle requests on configured port', async () => {
    const originalPort = process.env.PORT;
    process.env.PORT = '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;
    }
  });

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

  describe('/tarea command logging', () => {
    let consoleSpy: any;

    beforeEach(() => {
      consoleSpy = mock(() => {});
      console.log = consoleSpy;
    });

    afterEach(() => {
      consoleSpy.mockRestore();
    });

    test('should log basic /tarea command', async () => {
      const payload = {
        event: 'messages.upsert',
        instance: 'test-instance',
        data: {
          key: {
            remoteJid: 'group123@g.us',
            participant: 'user123@s.whatsapp.net'
          },
          message: { conversation: '/tarea test' }
        }
      };
      
      await WebhookServer.handleRequest(createTestRequest(payload));
      
      expect(consoleSpy).toHaveBeenCalledWith(
        '🔍 Detected /tarea command:',
        expect.objectContaining({
          rawMessage: '/tarea test'
        })
      );
      expect(consoleSpy).toHaveBeenCalledWith(
        '✅ Successfully parsed command:',
        expect.objectContaining({
          action: 'test',
          description: '',
          dueDate: 'none',
          mentionCount: 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: 'group123@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 the two command-related log calls
      expect(consoleSpy).toHaveBeenCalledTimes(2);
      
      // First call should be the command detection
      expect(consoleSpy.mock.calls[0][0]).toBe('🔍 Detected /tarea command:');
      expect(consoleSpy.mock.calls[0][1]).toEqual({
        timestamp: expect.any(String),
        from: 'user123@s.whatsapp.net',
        group: 'group123@g.us',
        rawMessage: `/tarea nueva Finish project @user2 ${futureDate}`
      });

      // Second call should be the successful parsing
      expect(consoleSpy.mock.calls[1][0]).toBe('✅ Successfully parsed command:');
      expect(consoleSpy.mock.calls[1][1]).toEqual({
        action: 'nueva',
        description: 'Finish project @user2',
        dueDate: futureDate,
        mentionCount: 1
      });
    });
  });

  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(mockAdd).toHaveBeenCalled();
  });

  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(console.log).toHaveBeenCalledWith(
      '✅ Successfully parsed command:',
      expect.objectContaining({
        description: `Test task ${futureDate1} some text`,
        dueDate: futureDate2
      })
    );
  });

  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(console.log).toHaveBeenCalledWith(
      '✅ Successfully parsed command:',
      expect.objectContaining({
        description: `Test task ${pastDate} more text`,
        dueDate: futureDate
      })
    );
  });

  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(console.log).toHaveBeenCalledWith(
      '✅ Successfully parsed command:',
      expect.objectContaining({
        description: `Test task ${pastDate1} and ${pastDate2}`,
        dueDate: 'none'
      })
    );
  });

  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(console.log).toHaveBeenCalledWith(
      '✅ Successfully parsed command:',
      expect.objectContaining({
        description: 'Test task 2023-13-01 (invalid) 25/12/2023 (invalid)',
        dueDate: futureDate
      })
    );
  });

  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(mockAdd).toHaveBeenCalled();
  });

  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(mockAdd).not.toHaveBeenCalled();
  });

  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(mockAdd).toHaveBeenCalled();
    
    // 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(mockAdd).not.toHaveBeenCalled();
    
    // 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(mockAdd).toHaveBeenCalled();
      
      // 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(mockAdd).not.toHaveBeenCalled();
      
      // 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(mockAdd).not.toHaveBeenCalled();
      
      // Reinitialize database for subsequent tests
      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(mockAdd).toHaveBeenCalled();
      
      // 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' }
        }
      };
      
      // Mock CommandService.handle to capture the sender parameter
      const mockCommandHandle = mock(async () => []);
      const originalCommandService = await import('../../src/services/command');
      originalCommandService.CommandService.handle = mockCommandHandle;
      
      const request = createTestRequest(payload);
      await WebhookServer.handleRequest(request);
      
      // Verify CommandService.handle was called with normalized sender ID
      expect(mockCommandHandle).toHaveBeenCalledWith({
        sender: '1234567890', // Normalized ID
        groupId: 'group-id@g.us',
        message: '/tarea nueva Test',
        mentions: []
      });
      
      // Restore original
      originalCommandService.CommandService.handle = originalCommandService.CommandService.handle;
    });

    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' }
        }
      };
      
      // Mock CommandService.handle to return a response
      const mockCommandHandle = mock(async () => [{
        recipient: '1234567890',
        message: 'Task created successfully'
      }]);
      const originalCommandService = await import('../../src/services/command');
      originalCommandService.CommandService.handle = mockCommandHandle;
      
      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 CommandService was called with normalized ID
      expect(mockCommandHandle).toHaveBeenCalledWith({
        sender: '1234567890',
        groupId: 'group-id@g.us',
        message: '/tarea nueva Test task',
        mentions: []
      });
      
      // Verify ResponseQueue.add was called with the response
      expect(mockAdd).toHaveBeenCalledWith([{
        recipient: '1234567890',
        message: 'Task created successfully'
      }]);
      
      // Restore original
      originalCommandService.CommandService.handle = originalCommandService.CommandService.handle;
    });
  });

  describe('Group validation in handleMessageUpsert', () => {
    test('should ignore messages from inactive groups', async () => {
      // Mock isGroupActive to return false for this test
      mock(GroupSyncService.isGroupActive).mockReturnValue(false);

      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(mockAdd).not.toHaveBeenCalled();
    });

    test('should proceed with messages from active groups', async () => {
      // Ensure isGroupActive returns true (already mocked in beforeEach)
      const payload = {
        event: 'messages.upsert',
        instance: 'test-instance',
        data: {
          key: {
            remoteJid: 'active-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(mockAdd).toHaveBeenCalled();
    });
  });
});