import { NextRequest, NextResponse } from "next/server";
import { PrismaClient } from "@prisma/client";

const prisma = new PrismaClient();

export const POST = async (req: NextRequest) => {
  try {
    const formData = await req.formData();
    const body = Object.fromEntries(formData);
    const file = (body.file as File) || null;

    if (!file) {
      const response = NextResponse.json({
        success: false,
        error: "No file provided",
      }, { status: 400 });
      
      response.headers.set('Access-Control-Allow-Origin', '*');
      return response;
    }

    // Convert file to buffer
    const buffer = Buffer.from(await file.arrayBuffer());
    
    // Store file in database
    const savedFile = await prisma.file.create({
      data: {
        filename: file.name,
        mimetype: file.type,
        size: file.size,
        data: buffer,
      },
    });

    const response = NextResponse.json({
      success: true,
      file: {
        id: savedFile.id,
        filename: savedFile.filename,
        mimetype: savedFile.mimetype,
        size: savedFile.size,
        createdAt: savedFile.createdAt,
      },
    });
    
    response.headers.set('Access-Control-Allow-Origin', '*');
    return response;
  } catch (error) {
    console.error("Upload error:", error);
    const response = NextResponse.json({
      success: false,
      error: "Failed to upload file",
    }, { status: 500 });
    
    response.headers.set('Access-Control-Allow-Origin', '*');
    return response;
  } finally {
    await prisma.$disconnect();
  }
};

export const OPTIONS = async () => {
  const response = new NextResponse(null, { status: 200 });
  response.headers.set('Access-Control-Allow-Origin', '*');
  response.headers.set('Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE, OPTIONS');
  response.headers.set('Access-Control-Allow-Headers', 'Content-Type, Authorization');
  return response;
};