import { NextRequest, NextResponse } from "next/server";
import { getServerSession } from "@/lib/auth";
import { db } from "@/lib/db";
import { marks, bingoItems } from "@/lib/db/schema";
import { eq, and } from "drizzle-orm";
import { v4 as uuidv4 } from "uuid";

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

  try {
    const { campaignId, itemId } = await req.json();
    if (!campaignId || !itemId) {
      return NextResponse.json({ error: "campaignId and itemId required" }, { status: 400 });
    }

    const item = db.select().from(bingoItems)
      .where(and(eq(bingoItems.id, itemId), eq(bingoItems.campaignId, campaignId)))
      .get();
    if (!item) return NextResponse.json({ error: "Item not found" }, { status: 404 });

    const existing = db.select().from(marks)
      .where(and(eq(marks.campaignId, campaignId), eq(marks.itemId, itemId)))
      .get();
    if (existing) {
      return NextResponse.json({ error: "Already marked", mark: existing }, { status: 409 });
    }

    const id = uuidv4();
    const now = new Date().toISOString();
    db.insert(marks).values({ id, campaignId, itemId, userId: session.id, createdAt: now }).run();

    return NextResponse.json({ id, markedBy: session.nickname });
  } catch {
    return NextResponse.json({ error: "Failed to mark" }, { status: 500 });
  }
}

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

  try {
    const { campaignId, itemId } = await req.json();
    if (!campaignId || !itemId) {
      return NextResponse.json({ error: "campaignId and itemId required" }, { status: 400 });
    }

    db.delete(marks)
      .where(and(eq(marks.campaignId, campaignId), eq(marks.itemId, itemId)))
      .run();

    return NextResponse.json({ ok: true });
  } catch {
    return NextResponse.json({ error: "Failed to unmark" }, { status: 500 });
  }
}