import { describe, test, expect, beforeEach, afterEach, mock } from 'bun:test';
import { WebhookServer } from '../../src/server';
import { ResponseQueue } from '../../src/services/response-queue';

// Mock the ResponseQueue
let mockAdd: any;

beforeEach(() => {
  mockAdd = mock(() => Promise.resolve());
  ResponseQueue.add = mockAdd;
});

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 payload of invalidPayloads) {
      const request = createTestRequest(payload);
      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;
    }
  });

  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 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 2025-04-30',
            contextInfo: {
              mentionedJid: ['user2@s.whatsapp.net']
            }
          }
        }
      };
      
      await WebhookServer.handleRequest(createTestRequest(payload));
      
      // Verify the two command-related log calls (first log is skipped in test mode)
      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 2025-04-30'
      });

      // 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: '2025-04-30',
        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();
  });
});