const fs = require('fs');
const path = require('path');

// 测试数据生成脚本
class TestDataGenerator {
  constructor() {
    this.backendUrl = process.env.TEST_BACKEND_URL || 'http://localhost:3000';
    this.users = [];
    this.devices = [];
    this.events = [];
  }

  async createTestUser(userData) {
    try {
      // 注册用户
      const registerResponse = await fetch(`${this.backendUrl}/api/v1/auth/register-email`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify(userData)
      });

      if (!registerResponse.ok) {
        throw new Error(`注册失败: ${registerResponse.statusText}`);
      }

      // 登录获取token
      const loginResponse = await fetch(`${this.backendUrl}/api/v1/auth/login-email`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
          email: userData.email,
          password: userData.password
        })
      });

      if (!loginResponse.ok) {
        throw new Error(`登录失败: ${loginResponse.statusText}`);
      }

      const loginData = await loginResponse.json();
      const user = {
        ...userData,
        ...loginData,
        id: loginData.userId
      };

      this.users.push(user);
      console.log(`✅ 创建测试用户: ${user.email}`);
      return user;
    } catch (error) {
      console.error(`❌ 创建用户失败: ${error.message}`);
      throw error;
    }
  }

  async createTestDevice(user, hardwareId) {
    try {
      // 创建库存设备
      const inventoryResponse = await fetch(`${this.backendUrl}/api/v1/devices/inventory`, {
        method: 'POST',
        headers: { 
          'Content-Type': 'application/json',
          'Authorization': `Bearer ${user.accessToken}`
        },
        body: JSON.stringify({ hardwareId, isClaimed: false })
      });

      // 注册设备到用户
      const registerResponse = await fetch(`${this.backendUrl}/api/v1/devices/register`, {
        method: 'POST',
        headers: { 
          'Content-Type': 'application/json',
          'Authorization': `Bearer ${user.accessToken}`
        },
        body: JSON.stringify({ hardwareId })
      });

      if (!registerResponse.ok) {
        throw new Error(`设备注册失败: ${registerResponse.statusText}`);
      }

      const deviceData = await registerResponse.json();
      const device = {
        ...deviceData.device,
        userId: user.id,
        userToken: user.accessToken
      };

      this.devices.push(device);
      console.log(`✅ 创建测试设备: ${hardwareId}`);
      return device;
    } catch (error) {
      console.error(`❌ 创建设备失败: ${error.message}`);
      throw error;
    }
  }

  async createTestEvent(device, eventData) {
    try {
      const user = this.users.find(u => u.id === device.userId);
      if (!user) {
        throw new Error('找不到对应用户');
      }

      // 创建测试图片
      const testImageBuffer = this.generateTestImage();
      
      // 创建FormData
      const formData = new FormData();
      formData.append('file', new Blob([testImageBuffer], { type: 'image/jpeg' }), 'test-event.jpg');
      formData.append('eventData', JSON.stringify({
        ...eventData,
        metadata: {
          ...eventData.metadata,
          deviceId: device.id
        }
      }));

      const response = await fetch(`${this.backendUrl}/api/v1/events/upload`, {
        method: 'POST',
        headers: { 
          'Authorization': `Bearer ${user.accessToken}`
        },
        body: formData
      });

      if (!response.ok) {
        throw new Error(`事件上传失败: ${response.statusText}`);
      }

      const eventResult = await response.json();
      this.events.push(eventResult);
      console.log(`✅ 创建测试事件: ${eventData.eventType}`);
      return eventResult;
    } catch (error) {
      console.error(`❌ 创建事件失败: ${error.message}`);
      throw error;
    }
  }

  generateTestImage() {
    // 生成一个简单的测试图片 (JPEG头部)
    return Buffer.from([
      0xFF, 0xD8, 0xFF, 0xE0, 0x00, 0x10, 0x4A, 0x46, 0x49, 0x46, 0x00, 0x01,
      0x01, 0x01, 0x00, 0x48, 0x00, 0x48, 0x00, 0x00, 0xFF, 0xDB, 0x00, 0x43,
      0x00, 0x08, 0x06, 0x06, 0x07, 0x06, 0x05, 0x08, 0x07, 0x07, 0x07, 0x09,
      0x09, 0x08, 0x0A, 0x0C, 0x14, 0x0D, 0x0C, 0x0B, 0x0B, 0x0C, 0x19, 0x12,
      0x13, 0x0F, 0x14, 0x1D, 0x1A, 0x1F, 0x1E, 0x1D, 0x1A, 0x1C, 0x1C, 0x20,
      0x24, 0x2E, 0x27, 0x20, 0x22, 0x2C, 0x23, 0x1C, 0x1C, 0x28, 0x37, 0x29,
      0x2C, 0x30, 0x31, 0x34, 0x34, 0x34, 0x1F, 0x27, 0x39, 0x3D, 0x38, 0x32,
      0x3C, 0x2E, 0x33, 0x34, 0x32, 0xFF, 0xD9
    ]);
  }

  async createValidatedEvent(rawEventId, device, validationData) {
    try {
      // 直接插入到数据库 (模拟处理服务完成)
      const user = this.users.find(u => u.id === device.userId);
      
      const validatedEvent = {
        rawEventId,
        deviceId: device.id,
        userProfileId: user.id,
        mediaUrl: `https://meteor-test-bucket.s3.amazonaws.com/events/${device.id}/${rawEventId}.jpg`,
        eventType: validationData.eventType,
        capturedAt: validationData.capturedAt,
        isValid: validationData.isValid || true,
        validationScore: validationData.validationScore || '0.95',
        metadata: validationData.metadata || {}
      };

      // 这里需要直接数据库操作，简化起见先记录
      console.log(`✅ 创建验证事件: ${validationData.eventType}`);
      return validatedEvent;
    } catch (error) {
      console.error(`❌ 创建验证事件失败: ${error.message}`);
      throw error;
    }
  }

  async generateFullTestDataSet() {
    console.log('🎯 开始生成完整测试数据集...');

    try {
      // 创建测试用户
      const testUsers = [
        {
          email: 'gallery-test@meteor.dev',
          password: 'TestPassword123',
          displayName: 'Gallery Test User'
        },
        {
          email: 'admin-test@meteor.dev', 
          password: 'AdminPassword123',
          displayName: 'Admin Test User'
        }
      ];

      for (const userData of testUsers) {
        await this.createTestUser(userData);
      }

      // 为每个用户创建设备
      let deviceCounter = 1;
      for (const user of this.users) {
        const device = await this.createTestDevice(user, `TEST_DEVICE_${String(deviceCounter).padStart(3, '0')}`);
        deviceCounter++;

        // 为每个设备创建测试事件
        const eventTypes = ['meteor', 'satellite', 'airplane', 'bird', 'noise'];
        const eventDates = this.generateTestDates(10);

        for (let i = 0; i < 10; i++) {
          const eventType = eventTypes[i % eventTypes.length];
          const eventData = {
            eventType,
            eventTimestamp: eventDates[i].toISOString(),
            metadata: {
              location: `Test Location ${i + 1}`,
              confidence: Math.random() * 0.4 + 0.6, // 0.6-1.0
              temperature: Math.random() * 30 + 10, // 10-40°C
              weather: ['clear', 'cloudy', 'rainy'][Math.floor(Math.random() * 3)]
            }
          };

          await this.createTestEvent(device, eventData);
        }
      }

      // 保存测试数据到文件
      await this.saveTestDataToFile();
      
      console.log('🎉 测试数据生成完成！');
      console.log(`📊 统计: ${this.users.length} 用户, ${this.devices.length} 设备, ${this.events.length} 事件`);

    } catch (error) {
      console.error('❌ 测试数据生成失败:', error);
      throw error;
    }
  }

  generateTestDates(count) {
    const dates = [];
    const now = new Date();
    
    for (let i = 0; i < count; i++) {
      const date = new Date(now);
      date.setDate(date.getDate() - i);
      date.setHours(date.getHours() - Math.floor(Math.random() * 24));
      dates.push(date);
    }
    
    return dates.sort((a, b) => b - a); // 最新的在前
  }

  async saveTestDataToFile() {
    const testData = {
      users: this.users.map(u => ({ ...u, accessToken: '***', refreshToken: '***' })), // 安全起见隐藏token
      devices: this.devices,
      events: this.events,
      generatedAt: new Date().toISOString()
    };

    const filePath = path.join(__dirname, 'generated-test-data.json');
    fs.writeFileSync(filePath, JSON.stringify(testData, null, 2));
    console.log(`💾 测试数据已保存到: ${filePath}`);
  }
}

// 主函数
async function main() {
  const generator = new TestDataGenerator();
  
  try {
    await generator.generateFullTestDataSet();
    process.exit(0);
  } catch (error) {
    console.error('测试数据生成失败:', error);
    process.exit(1);
  }
}

// 如果直接运行此脚本
if (require.main === module) {
  main();
}

module.exports = TestDataGenerator;