import { NextRequest, NextResponse } from 'next/server';
import fs from 'fs';
import path from 'path';

export async function GET(
    request: NextRequest,
    context: { params: Promise<{ filename: string }> }
) {
    const { filename } = await context.params;

    // Define potential paths to the backend uploads directory
    // We need to handle different CWD contexts (app root vs workspace root)
    const potentialPaths = [
        path.join(process.cwd(), '..', 'api', 'uploads', filename),        // If CWD is apps/web
        path.join(process.cwd(), 'apps', 'api', 'uploads', filename),      // If CWD is workspace root
        path.resolve(process.cwd(), '../../apps/api/uploads', filename),   // fallback
        'c:/ignosidev/Igcrm/apps/api/uploads/' + filename                  // Absolute path fallback
    ];

    let filePath = '';
    for (const p of potentialPaths) {
        // console.log('Checking path:', p);
        if (fs.existsSync(p)) {
            filePath = p;
            console.log('Found PDF at:', filePath);
            break;
        }
    }

    if (!filePath) {
        console.error(`PDF not found. Filename: ${filename}. Searched in:`, potentialPaths);
        return new NextResponse('File not found', { status: 404 });
    }

    try {
        const fileBuffer = fs.readFileSync(filePath);
        return new NextResponse(fileBuffer, {
            headers: {
                'Content-Type': 'application/pdf',
                'Content-Disposition': `inline; filename="${filename}"`,
            },
        });
    } catch (error) {
        console.error('Error reading PDF:', error);
        return new NextResponse('Internal Server Error', { status: 500 });
    }
}