const FormData = require('form-data');
const fs = require('fs');
const fetch = require('node-fetch');

/**
 * Test script for the Event Upload API
 * This demonstrates how to upload events from edge devices
 */

const API_BASE_URL = 'http://localhost:3000';

async function testEventUpload() {
  console.log('🧪 Testing Event Upload API');
  console.log('============================');

  try {
    // Step 1: Register a test user
    console.log('1️⃣ Registering test user...');
    const registerResponse = await fetch(`${API_BASE_URL}/api/v1/auth/register-email`, {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
      },
      body: JSON.stringify({
        email: 'eventtest@example.com',
        password: 'TestPassword123',
        displayName: 'Event Test User',
      }),
    });

    if (!registerResponse.ok) {
      const error = await registerResponse.json();
      if (error.message?.includes('already exists')) {
        console.log('   User already exists, continuing...');
      } else {
        throw new Error(`Registration failed: ${error.message}`);
      }
    } else {
      console.log('   ✅ User registered successfully');
    }

    // Step 2: Login to get JWT token
    console.log('2️⃣ Logging in to get JWT token...');
    const loginResponse = await fetch(`${API_BASE_URL}/api/v1/auth/login-email`, {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
      },
      body: JSON.stringify({
        email: 'eventtest@example.com',
        password: 'TestPassword123',
      }),
    });

    if (!loginResponse.ok) {
      const error = await loginResponse.json();
      throw new Error(`Login failed: ${error.message}`);
    }

    const loginData = await loginResponse.json();
    const jwtToken = loginData.accessToken;
    console.log('   ✅ Login successful, got JWT token');

    // Step 3: Register a device (if not already registered)
    console.log('3️⃣ Registering test device...');
    
    // First add the device to inventory
    const addToInventoryResponse = await fetch(`${API_BASE_URL}/api/v1/devices/inventory`, {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
        'Authorization': `Bearer ${jwtToken}`,
      },
      body: JSON.stringify({
        hardwareId: 'EVENT_TEST_DEVICE_001',
        deviceModel: 'Test Camera v1.0',
      }),
    });

    // Register the device
    const deviceResponse = await fetch(`${API_BASE_URL}/api/v1/devices/register`, {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
        'Authorization': `Bearer ${jwtToken}`,
      },
      body: JSON.stringify({
        hardwareId: 'EVENT_TEST_DEVICE_001',
      }),
    });

    let deviceId;
    if (deviceResponse.ok) {
      const deviceData = await deviceResponse.json();
      deviceId = deviceData.device.id;
      console.log(`   ✅ Device registered: ${deviceId}`);
    } else {
      const error = await deviceResponse.json();
      if (error.message?.includes('already registered')) {
        console.log('   Device already registered, fetching device list...');
        
        // Get user's devices
        const devicesResponse = await fetch(`${API_BASE_URL}/api/v1/devices`, {
          headers: {
            'Authorization': `Bearer ${jwtToken}`,
          },
        });
        
        if (devicesResponse.ok) {
          const devicesData = await devicesResponse.json();
          if (devicesData.devices.length > 0) {
            deviceId = devicesData.devices[0].id;
            console.log(`   ✅ Using existing device: ${deviceId}`);
          }
        }
      }
      
      if (!deviceId) {
        throw new Error(`Device registration failed: ${error.message}`);
      }
    }

    // Step 4: Create a test file
    console.log('4️⃣ Creating test image file...');
    const testImageData = Buffer.from('fake-image-data-for-testing');
    
    // Step 5: Upload an event
    console.log('5️⃣ Uploading event...');
    
    const form = new FormData();
    form.append('file', testImageData, {
      filename: 'motion_capture.jpg',
      contentType: 'image/jpeg',
    });
    
    const eventData = {
      eventType: 'motion',
      eventTimestamp: new Date().toISOString(),
      metadata: {
        deviceId: deviceId,
        location: 'front_door',
        confidence: 0.95,
        temperature: 22.5,
      },
    };
    
    form.append('eventData', JSON.stringify(eventData));

    const uploadResponse = await fetch(`${API_BASE_URL}/api/v1/events/upload`, {
      method: 'POST',
      headers: {
        'Authorization': `Bearer ${jwtToken}`,
      },
      body: form,
    });

    if (!uploadResponse.ok) {
      const error = await uploadResponse.json();
      throw new Error(`Event upload failed: ${error.message}`);
    }

    const uploadResult = await uploadResponse.json();
    console.log('   ✅ Event uploaded successfully!');
    console.log(`   Event ID: ${uploadResult.rawEventId}`);
    console.log(`   Message: ${uploadResult.message}`);

    // Step 6: Verify the event was saved
    console.log('6️⃣ Verifying event was saved...');
    const eventsResponse = await fetch(`${API_BASE_URL}/api/v1/events/user`, {
      headers: {
        'Authorization': `Bearer ${jwtToken}`,
      },
    });

    if (eventsResponse.ok) {
      const eventsData = await eventsResponse.json();
      console.log(`   ✅ Found ${eventsData.events.length} events for user`);
      
      if (eventsData.events.length > 0) {
        const latestEvent = eventsData.events[0];
        console.log(`   Latest event: ${latestEvent.eventType} at ${latestEvent.eventTimestamp}`);
      }
    }

    console.log('\n🎉 Event Upload API Test Completed Successfully!');
    console.log('================================================');
    
  } catch (error) {
    console.error('❌ Test failed:', error.message);
    console.log('\n💡 Make sure:');
    console.log('   - Backend server is running (npm run start:dev)');
    console.log('   - Database is accessible and migrated');
    console.log('   - AWS credentials are configured (for actual S3/SQS operations)');
    process.exit(1);
  }
}

// Handle missing node-fetch gracefully
if (typeof fetch === 'undefined') {
  console.log('📦 Installing required dependencies...');
  console.log('Run: npm install node-fetch@2 form-data');
  console.log('Then run this script again: node test-event-upload.js');
  process.exit(1);
}

testEventUpload();