import { NextResponse } from 'next/server';
import { getAdminAuth, getAdminStorage } from '@/lib/firebase/admin';

export async function GET(
  request: Request,
  { params }: { params: Promise<{ projectId: string }> }
) {
  try {
    const { projectId } = await params;
    
    // Authentication (skip in development if no auth header)
    const authHeader = request.headers.get('Authorization');
    const isDevelopment = process.env.NODE_ENV === 'development';
    
    if (!isDevelopment || authHeader?.startsWith('Bearer ')) {
      if (!authHeader?.startsWith('Bearer ')) {
        return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
      }

      const token = authHeader.substring(7);
      const auth = getAdminAuth();
      const decoded = await auth.verifyIdToken(token);
      
      if (!decoded?.uid) {
        return NextResponse.json({ error: 'Invalid token' }, { status: 401 });
      }
    }

    // List files in Firebase Storage for this project
    let fileList = [];
    
    try {
      const storage = getAdminStorage();
      const bucket = storage.bucket();
      const [files] = await bucket.getFiles({
        prefix: `projects/${projectId}/`,
        maxResults: 100,
      });

      fileList = files.map(file => ({
        name: file.name.split('/').pop() || file.name,
        fullPath: file.name,
        size: file.metadata.size,
        contentType: file.metadata.contentType,
        timeCreated: file.metadata.timeCreated,
        updated: file.metadata.updated,
      }));
      
      console.log('[API /storage/files] Found', fileList.length, 'files');
    } catch (storageError) {
      console.error('[API /storage/files] Firebase Storage query failed:', storageError);
      console.error('[API /storage/files] This is likely due to missing Firebase Admin credentials');
      // Return empty array instead of failing
      fileList = [];
    }

    return NextResponse.json({
      success: true,
      files: fileList,
      count: fileList.length,
    });
  } catch (error) {
    console.error('[API] Error fetching storage files:', error);
    return NextResponse.json(
      { error: 'Failed to fetch storage files' },
      { status: 500 }
    );
  }
}