import { NextResponse } from "next/server";
import { getServerSession } from "next-auth/next";
import { authOptions } from "@/lib/auth";
import { prisma } from "@/lib/prisma";

export async function POST(req: Request, { params }: { params: { id: string } }) {
  try {
    const session = await getServerSession(authOptions);
    const userId = (session?.user as any)?.id;

    if (!userId) {
      return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
    }

    const jobId = params.id;
    const { status, notes } = await req.json();

    if (!status) {
      // If status is null or empty, delete interaction
      await prisma.userJobInteraction.deleteMany({
        where: { userId, jobId },
      });
      return NextResponse.json({ success: true, status: null });
    }

    const validStatuses = ["SAVED", "APPLIED", "INTERVIEWING", "REJECTED", "HIDDEN"];
    if (!validStatuses.includes(status)) {
      return NextResponse.json({ error: "Invalid status" }, { status: 400 });
    }

    const interaction = await prisma.userJobInteraction.upsert({
      where: {
        userId_jobId: {
          userId,
          jobId,
        },
      },
      update: {
        status,
        notes: notes !== undefined ? notes : undefined,
      },
      create: {
        userId,
        jobId,
        status,
        notes: notes || null,
      },
    });

    return NextResponse.json({ success: true, interaction });
  } catch (error: any) {
    return NextResponse.json({ error: error.message || "Failed to update interaction" }, { status: 500 });
  }
}