/**
 * Test Minio Upload Script
 * 
 * Usage:
 * node scripts/test-minio-upload.js
 * 
 * This script tests connectivity to Minio by uploading a simple test file
 * and then trying to retrieve it. It uses the same S3 client configuration
 * as the main application.
 */

require('dotenv').config();
const { S3Client, PutObjectCommand, GetObjectCommand, DeleteObjectCommand } = require('@aws-sdk/client-s3');

// Configuration for S3/Minio from environment variables
const S3_CONFIG = {
  endpoint: process.env.MINIO_S3_UPLOAD_BUCKET_URL,
  region: process.env.MINIO_AWS_REGION,
  bucket: process.env.MINIO_AWS_S3_UPLOAD_BUCKET_NAME,
  accessKey: process.env.MINIO_ACCESS_KEY || process.env.AWS_ACCESS_KEY_ID,
  secretKey: process.env.MINIO_SECRET_KEY || process.env.AWS_SECRET_ACCESS_KEY,
};

// Initialize S3 client with standard configuration
const s3Config = {
  region: S3_CONFIG.region,
  endpoint: S3_CONFIG.endpoint,
  forcePathStyle: true, // Required for MinIO
};

// Add credentials if available
if (S3_CONFIG.accessKey && S3_CONFIG.secretKey) {
  Object.assign(s3Config, {
    credentials: {
      accessKeyId: S3_CONFIG.accessKey,
      secretAccessKey: S3_CONFIG.secretKey
    }
  });
}

// Create S3 client
const s3Client = new S3Client(s3Config);

/**
 * Generate a public URL for a file stored in Minio/S3
 */
function getPublicUrl(filePath) {
  if (!filePath) return '';
  if (filePath.startsWith('http')) return filePath; // Already a full URL
  
  // Remove leading slash if present
  const cleanPath = filePath.startsWith('/') ? filePath.substring(1) : filePath;
  
  // Construct the full URL
  const endpoint = S3_CONFIG.endpoint?.replace(/\/$/, ''); // Remove trailing slash if present
  const bucket = S3_CONFIG.bucket;
  
  // Return original path if no endpoint is configured
  if (!endpoint) {
    console.warn('No S3/Minio endpoint configured, returning original path');
    return cleanPath;
  }
  
  // Construct and return the full URL
  return `${endpoint}/${bucket}/${cleanPath}`;
}

/**
 * Test Minio connection by uploading and retrieving a test file
 */
async function testMinioUpload() {
  // Generate a unique test file path
  const testKey = `test/upload-test-${Date.now()}.txt`;
  const testContent = 'This is a test file created at ' + new Date().toISOString();

  console.log('=== Testing Minio Upload ===');
  console.log('S3 Configuration:');
  console.log('  Endpoint:', S3_CONFIG.endpoint || 'MISSING!');
  console.log('  Region:', S3_CONFIG.region || 'MISSING!');
  console.log('  Bucket:', S3_CONFIG.bucket || 'MISSING!');
  console.log('  Has Access Key:', !!S3_CONFIG.accessKey || 'MISSING!');
  console.log('  Has Secret Key:', !!S3_CONFIG.secretKey || 'MISSING!');
  
  try {
    // 1. Upload test file
    console.log('\nStep 1: Uploading test file...');
    console.log('  File path:', testKey);
    console.log('  Content:', testContent);
    
    const uploadCommand = new PutObjectCommand({
      Bucket: S3_CONFIG.bucket,
      Key: testKey,
      Body: testContent,
      ContentType: 'text/plain'
    });
    
    const uploadResult = await s3Client.send(uploadCommand);
    console.log('  Upload successful!');
    console.log('  ETag:', uploadResult.ETag);
    
    // 2. Generate public URL
    const publicUrl = getPublicUrl(testKey);
    console.log('\nStep 2: Generated public URL:');
    console.log('  URL:', publicUrl);
    
    // 3. Download the file to verify it was uploaded correctly
    console.log('\nStep 3: Downloading test file to verify...');
    const downloadCommand = new GetObjectCommand({
      Bucket: S3_CONFIG.bucket,
      Key: testKey
    });
    
    const downloadResult = await s3Client.send(downloadCommand);
    const downloadedContent = await downloadResult.Body.transformToString();
    
    console.log('  Download successful!');
    console.log('  Content:', downloadedContent);
    
    if (downloadedContent === testContent) {
      console.log('  Content verification: ✓ Matches original');
    } else {
      console.log('  Content verification: ✗ Does not match original');
      console.log('  Expected:', testContent);
      console.log('  Received:', downloadedContent);
    }
    
    // 4. Cleanup - Delete the test file
    console.log('\nStep 4: Cleaning up - deleting test file...');
    const deleteCommand = new DeleteObjectCommand({
      Bucket: S3_CONFIG.bucket,
      Key: testKey
    });
    
    await s3Client.send(deleteCommand);
    console.log('  Deletion successful!');
    
    console.log('\n=== Test completed successfully ===');
    console.log('Minio is properly configured and accessible.');
    console.log('File uploads should be working correctly.');
    
  } catch (error) {
    console.error('\n=== Test failed ===');
    console.error('Error details:', error);
    console.error('\nPossible issues:');
    console.error('1. Minio server is not running or not accessible');
    console.error('2. Incorrect endpoint URL');
    console.error('3. Invalid credentials');
    console.error('4. Bucket does not exist or is not accessible');
    console.error('5. Network connectivity issues');
    
    console.error('\nEnvironment variables to check:');
    console.error('- MINIO_S3_UPLOAD_BUCKET_URL');
    console.error('- MINIO_AWS_S3_UPLOAD_BUCKET_NAME');
    console.error('- MINIO_ACCESS_KEY / AWS_ACCESS_KEY_ID');
    console.error('- MINIO_SECRET_KEY / AWS_SECRET_ACCESS_KEY');
  }
}

// Run the test
testMinioUpload();