import { NextRequest, NextResponse } from 'next/server';
import { getServerSession } from 'next-auth';
import { authOptions } from '@/app/api/auth/options';
import { S3Client, GetObjectCommand } from '@aws-sdk/client-s3';
import { NoSuchKey } from '@aws-sdk/client-s3';
import { logger } from '@/lib/logger';

// Initialize S3 client
const s3Client = new S3Client({
  region: 'us-east-1',
  endpoint: 'https://dome-api.slm-lab.net',
  credentials: {
    accessKeyId: '4aBT4CMb7JIMMyUtp4Pl',
    secretAccessKey: 'HGn39XhCIlqOjmDVzRK9MED2Fci2rYvDDgbLFElg'
  },
  forcePathStyle: true // Required for MinIO
});

// This endpoint serves mission images from Minio using the server's credentials
export async function GET(
  request: NextRequest,
  { params }: { params: Promise<{ path: string[] }> }
) {
  try {
    const { path: pathSegments } = await params;
    if (!pathSegments || pathSegments.length === 0) {
      logger.error('No path segments provided');
      return new NextResponse('Path is required', { status: 400 });
    }

    // Reconstruct the full path from path segments
    const filePath = pathSegments.join('/');
    logger.debug('Fetching mission image', {
      originalPath: filePath,
      segments: pathSegments
    });

    // Remove the missions/ prefix from the URL path since the file is already in the missions bucket
    const minioPath = filePath.replace(/^missions\//, '');
    logger.debug('Full Minio path', {
      minioPath,
      bucket: 'missions'
    });

    const command = new GetObjectCommand({
      Bucket: 'missions',
      Key: minioPath,
    });

    try {
      const response = await s3Client.send(command);
      if (!response.Body) {
        logger.error('File not found in Minio', {
          path: filePath,
          minioPath,
          bucket: 'missions'
        });
        return new NextResponse('File not found', { status: 404 });
      }

      // Set appropriate content type and cache control
      const contentType = response.ContentType || 'image/png'; // Default to image/png if not specified
      const headers = new Headers();
      headers.set('Content-Type', contentType);
      headers.set('Cache-Control', 'public, max-age=31536000');

      logger.debug('Serving image', {
        path: filePath,
        minioPath,
        contentType,
        contentLength: response.ContentLength
      });

      return new NextResponse(response.Body as any, { headers });
    } catch (error) {
      logger.error('Error fetching file from Minio', {
        error: error instanceof Error ? error.message : String(error),
        path: filePath,
        minioPath,
        bucket: 'missions',
        errorType: error instanceof NoSuchKey ? 'NoSuchKey' : 'Unknown'
      });
      if (error instanceof NoSuchKey) {
        return new NextResponse('File not found', { status: 404 });
      }
      return new NextResponse('Internal Server Error', { status: 500 });
    }
  } catch (error) {
    logger.error('Error in image serving', {
      error: error instanceof Error ? error.message : String(error)
    });
    return new NextResponse('Internal Server Error', { status: 500 });
  }
}