import { NextRequest, NextResponse } from "next/server";
import { auth } from "@/auth";
import { uploadFile } from "@/lib/storage";

export const config = { api: { bodyParser: false } };

export const maxDuration = 60;

export async function POST(req: NextRequest) {
  const session = await auth();
  if (!session?.user) {
    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
  }

  try {
    const formData = await req.formData();
    const file = formData.get("file") as File | null;
    const type = (formData.get("type") as string) || "videos";

    if (!file) {
      return NextResponse.json({ error: "No file provided" }, { status: 400 });
    }

    // Validate file type based on upload type
    if (type === "image" && !file.type.match(/image\//)) {
      return NextResponse.json({ error: "Only image files are accepted" }, { status: 400 });
    }

    if (type === "video" && !file.type.match(/video\//)) {
      return NextResponse.json({ error: "Only video files are accepted" }, { status: 400 });
    }

    // Size limit: 500MB for images, 2GB for videos
    const maxSize = type === "image" ? 500 * 1024 * 1024 : 2 * 1024 * 1024 * 1024;
    if (file.size > maxSize) {
      const maxSizeStr = type === "image" ? "500 MB" : "2 GB";
      return NextResponse.json(
        { error: `File too large (max ${maxSizeStr})` },
        { status: 413 }
      );
    }

    const buffer = Buffer.from(await file.arrayBuffer());
    const result = await uploadFile(buffer, file.name, file.type, type);

    return NextResponse.json({ url: result.url, key: result.key });
  } catch (err) {
    console.error("[upload]", err);
    return NextResponse.json({ error: "Upload failed" }, { status: 500 });
  }
}