import { describe, it, expect, beforeAll, afterAll, vi, beforeEach } from 'vitest';

interface PluginMessage {
  type: string;
  payload: any;
  traceId: string;
  tenantId: string;
  shopId: string;
  taskId: string;
  timestamp: number;
}

interface PluginResponse {
  success: boolean;
  data?: any;
  error?: string;
  traceId: string;
}

interface BrowserContext {
  profileDir: string;
  proxy: string;
  fingerprintPolicy: string;
  cookies: Array<{ name: string; value: string; domain: string }>;
}

interface CrawlResult {
  products: Array<{
    productId: string;
    name: string;
    price: number;
    stock: number;
    images: string[];
  }>;
  timestamp: number;
  source: string;
}

class MockPluginBridge {
  private messageHandlers: Map<string, (msg: PluginMessage) => Promise<PluginResponse>> = new Map();
  private contexts: Map<string, BrowserContext> = new Map();

  registerHandler(type: string, handler: (msg: PluginMessage) => Promise<PluginResponse>) {
    this.messageHandlers.set(type, handler);
  }

  async sendMessage(message: PluginMessage): Promise<PluginResponse> {
    const handler = this.messageHandlers.get(message.type);
    if (!handler) {
      return {
        success: false,
        error: `No handler for message type: ${message.type}`,
        traceId: message.traceId,
      };
    }
    return handler(message);
  }

  createContext(shopId: string, config: Partial<BrowserContext>): BrowserContext {
    const context: BrowserContext = {
      profileDir: config.profileDir || `/profiles/${shopId}`,
      proxy: config.proxy || '',
      fingerprintPolicy: config.fingerprintPolicy || 'default',
      cookies: config.cookies || [],
    };
    this.contexts.set(shopId, context);
    return context;
  }

  getContext(shopId: string): BrowserContext | undefined {
    return this.contexts.get(shopId);
  }

  clearContexts() {
    this.contexts.clear();
  }
}

class MockBackendService {
  private pendingTasks: Map<string, any> = new Map();

  async receiveCrawlResult(result: CrawlResult & { traceId: string; shopId: string }): Promise<{ success: boolean }> {
    console.log(`Received crawl result for shop ${result.shopId}`);
    return { success: true };
  }

  async receiveShipmentUpdate(data: {
    orderId: string;
    trackingNumber: string;
    status: string;
    traceId: string;
  }): Promise<{ success: boolean }> {
    console.log(`Received shipment update for order ${data.orderId}`);
    return { success: true };
  }

  addPendingTask(taskId: string, task: any) {
    this.pendingTasks.set(taskId, task);
  }

  getPendingTask(taskId: string): any {
    return this.pendingTasks.get(taskId);
  }

  clearPendingTasks() {
    this.pendingTasks.clear();
  }
}

describe('Plugin-Backend Integration Tests', () => {
  let pluginBridge: MockPluginBridge;
  let backendService: MockBackendService;

  beforeAll(() => {
    pluginBridge = new MockPluginBridge();
    backendService = new MockBackendService();

    pluginBridge.registerHandler('CRAWL_PRODUCTS', async (msg) => {
      const result: CrawlResult = {
        products: [
          { productId: 'PROD-001', name: 'Test Product 1', price: 99.99, stock: 100, images: ['img1.jpg'] },
          { productId: 'PROD-002', name: 'Test Product 2', price: 149.99, stock: 50, images: ['img2.jpg'] },
        ],
        timestamp: Date.now(),
        source: 'AMAZON',
      };

      await backendService.receiveCrawlResult({
        ...result,
        traceId: msg.traceId,
        shopId: msg.shopId,
      });

      return {
        success: true,
        data: result,
        traceId: msg.traceId,
      };
    });

    pluginBridge.registerHandler('EXECUTE_SHIPMENT', async (msg) => {
      await backendService.receiveShipmentUpdate({
        orderId: msg.payload.orderId,
        trackingNumber: `TRK-${Date.now()}`,
        status: 'SHIPPED',
        traceId: msg.traceId,
      });

      return {
        success: true,
        data: { trackingNumber: `TRK-${Date.now()}`, status: 'SHIPPED' },
        traceId: msg.traceId,
      };
    });

    pluginBridge.registerHandler('CREATE_BROWSER_CONTEXT', async (msg) => {
      const context = pluginBridge.createContext(msg.shopId, msg.payload.config);
      return {
        success: true,
        data: context,
        traceId: msg.traceId,
      };
    });

    pluginBridge.registerHandler('SYNC_AD_DATA', async (msg) => {
      return {
        success: true,
        data: {
          adId: msg.payload.adId,
          impressions: 1000,
          clicks: 50,
          spend: 25.50,
          conversions: 5,
        },
        traceId: msg.traceId,
      };
    });
  });

  beforeEach(() => {
    pluginBridge.clearContexts();
    backendService.clearPendingTasks();
  });

  afterAll(() => {
    vi.clearAllMocks();
  });

  describe('Message Protocol Tests', () => {
    it('should send and receive messages with correct format', async () => {
      const message: PluginMessage = {
        type: 'CRAWL_PRODUCTS',
        payload: { platform: 'AMAZON', category: 'Electronics' },
        traceId: 'trace-001',
        tenantId: 'tenant-001',
        shopId: 'shop-001',
        taskId: 'task-001',
        timestamp: Date.now(),
      };

      const response = await pluginBridge.sendMessage(message);

      expect(response.success).toBe(true);
      expect(response.traceId).toBe('trace-001');
      expect(response.data).toBeDefined();
    });

    it('should return error for unknown message type', async () => {
      const message: PluginMessage = {
        type: 'UNKNOWN_TYPE',
        payload: {},
        traceId: 'trace-002',
        tenantId: 'tenant-001',
        shopId: 'shop-001',
        taskId: 'task-002',
        timestamp: Date.now(),
      };

      const response = await pluginBridge.sendMessage(message);

      expect(response.success).toBe(false);
      expect(response.error).toContain('No handler');
    });

    it('should include five-tuple in all messages', async () => {
      const message: PluginMessage = {
        type: 'CRAWL_PRODUCTS',
        payload: {},
        traceId: 'trace-003',
        tenantId: 'tenant-001',
        shopId: 'shop-001',
        taskId: 'task-003',
        timestamp: Date.now(),
      };

      expect(message.traceId).toBeDefined();
      expect(message.tenantId).toBeDefined();
      expect(message.shopId).toBeDefined();
      expect(message.taskId).toBeDefined();
      expect(message.timestamp).toBeDefined();
    });
  });

  describe('Browser Context Isolation Tests', () => {
    it('should create isolated browser context for each shop', async () => {
      const message: PluginMessage = {
        type: 'CREATE_BROWSER_CONTEXT',
        payload: {
          config: {
            proxy: 'http://proxy1:8080',
            fingerprintPolicy: 'strict',
          },
        },
        traceId: 'trace-004',
        tenantId: 'tenant-001',
        shopId: 'shop-001',
        taskId: 'task-004',
        timestamp: Date.now(),
      };

      const response = await pluginBridge.sendMessage(message);

      expect(response.success).toBe(true);
      expect(response.data.profileDir).toContain('shop-001');
      expect(response.data.proxy).toBe('http://proxy1:8080');
      expect(response.data.fingerprintPolicy).toBe('strict');
    });

    it('should maintain separate contexts for different shops', async () => {
      await pluginBridge.sendMessage({
        type: 'CREATE_BROWSER_CONTEXT',
        payload: { config: { proxy: 'proxy1' } },
        traceId: 'trace-005',
        tenantId: 'tenant-001',
        shopId: 'shop-001',
        taskId: 'task-005',
        timestamp: Date.now(),
      });

      await pluginBridge.sendMessage({
        type: 'CREATE_BROWSER_CONTEXT',
        payload: { config: { proxy: 'proxy2' } },
        traceId: 'trace-006',
        tenantId: 'tenant-001',
        shopId: 'shop-002',
        taskId: 'task-006',
        timestamp: Date.now(),
      });

      const context1 = pluginBridge.getContext('shop-001');
      const context2 = pluginBridge.getContext('shop-002');

      expect(context1?.proxy).toBe('proxy1');
      expect(context2?.proxy).toBe('proxy2');
      expect(context1?.profileDir).not.toBe(context2?.profileDir);
    });
  });

  describe('Product Crawl Integration Tests', () => {
    it('should crawl products and send results to backend', async () => {
      const message: PluginMessage = {
        type: 'CRAWL_PRODUCTS',
        payload: {
          platform: 'AMAZON',
          keywords: ['electronics', 'headphones'],
          maxResults: 50,
        },
        traceId: 'trace-007',
        tenantId: 'tenant-001',
        shopId: 'shop-001',
        taskId: 'task-007',
        timestamp: Date.now(),
      };

      const response = await pluginBridge.sendMessage(message);

      expect(response.success).toBe(true);
      expect(response.data.products).toBeInstanceOf(Array);
      expect(response.data.products.length).toBeGreaterThan(0);
      expect(response.data.source).toBe('AMAZON');
    });

    it('should handle crawl errors gracefully', async () => {
      pluginBridge.registerHandler('CRAWL_ERROR', async () => {
        return {
          success: false,
          error: 'Network timeout',
          traceId: 'trace-008',
        };
      });

      const response = await pluginBridge.sendMessage({
        type: 'CRAWL_ERROR',
        payload: {},
        traceId: 'trace-008',
        tenantId: 'tenant-001',
        shopId: 'shop-001',
        taskId: 'task-008',
        timestamp: Date.now(),
      });

      expect(response.success).toBe(false);
      expect(response.error).toBeDefined();
    });
  });

  describe('Shipment Integration Tests', () => {
    it('should execute shipment and update backend', async () => {
      const message: PluginMessage = {
        type: 'EXECUTE_SHIPMENT',
        payload: {
          orderId: 'ORD-001',
          carrier: 'FedEx',
          items: [{ sku: 'SKU-001', quantity: 1 }],
        },
        traceId: 'trace-009',
        tenantId: 'tenant-001',
        shopId: 'shop-001',
        taskId: 'task-009',
        timestamp: Date.now(),
      };

      const response = await pluginBridge.sendMessage(message);

      expect(response.success).toBe(true);
      expect(response.data.trackingNumber).toBeDefined();
      expect(response.data.status).toBe('SHIPPED');
    });
  });

  describe('Ad Data Sync Integration Tests', () => {
    it('should sync ad data from platform', async () => {
      const message: PluginMessage = {
        type: 'SYNC_AD_DATA',
        payload: {
          adId: 'AD-001',
          platform: 'AMAZON',
          dateRange: { start: '2026-03-01', end: '2026-03-18' },
        },
        traceId: 'trace-010',
        tenantId: 'tenant-001',
        shopId: 'shop-001',
        taskId: 'task-010',
        timestamp: Date.now(),
      };

      const response = await pluginBridge.sendMessage(message);

      expect(response.success).toBe(true);
      expect(response.data.impressions).toBeDefined();
      expect(response.data.clicks).toBeDefined();
      expect(response.data.spend).toBeDefined();
      expect(response.data.conversions).toBeDefined();
    });
  });

  describe('Concurrent Task Tests', () => {
    it('should handle multiple concurrent plugin tasks', async () => {
      const tasks = Array(5)
        .fill(null)
        .map((_, i) =>
          pluginBridge.sendMessage({
            type: 'CRAWL_PRODUCTS',
            payload: { platform: 'AMAZON' },
            traceId: `trace-concurrent-${i}`,
            tenantId: 'tenant-001',
            shopId: `shop-${i}`,
            taskId: `task-${i}`,
            timestamp: Date.now(),
          })
        );

      const responses = await Promise.all(tasks);

      responses.forEach((response, i) => {
        expect(response.success).toBe(true);
        expect(response.traceId).toBe(`trace-concurrent-${i}`);
      });
    });
  });

  describe('Error Recovery Tests', () => {
    it('should retry failed tasks', async () => {
      let attempts = 0;

      pluginBridge.registerHandler('RETRY_TASK', async (msg) => {
        attempts++;
        if (attempts < 3) {
          return {
            success: false,
            error: 'Temporary failure',
            traceId: msg.traceId,
          };
        }
        return {
          success: true,
          data: { result: 'success' },
          traceId: msg.traceId,
        };
      });

      const message: PluginMessage = {
        type: 'RETRY_TASK',
        payload: {},
        traceId: 'trace-retry',
        tenantId: 'tenant-001',
        shopId: 'shop-001',
        taskId: 'task-retry',
        timestamp: Date.now(),
      };

      let response = await pluginBridge.sendMessage(message);
      expect(response.success).toBe(false);

      response = await pluginBridge.sendMessage(message);
      expect(response.success).toBe(false);

      response = await pluginBridge.sendMessage(message);
      expect(response.success).toBe(true);
    });
  });
});

export { MockPluginBridge, MockBackendService };
