"use server";

import { prisma } from "@/lib/prisma";
import { auth } from "@/lib/auth";
import { headers } from "next/headers";
import { revalidatePath } from "next/cache";

async function requireAdmin() {
  const session = await auth.api.getSession({ headers: await headers() });
  if (!session || session.user.role !== "admin") throw new Error("Forbidden");
}

export async function saveQuiz(
  lessonId: string,
  questions: { text: string; type: "TEXT" | "SINGLE" | "MULTIPLE"; order: number }[]
) {
  await requireAdmin();

  const existing = await prisma.quiz.findUnique({ where: { lessonId } });

  if (existing) {
    await prisma.quizQuestion.deleteMany({ where: { quizId: existing.id } });
    await prisma.quizQuestion.createMany({
      data: questions.map((q) => ({
        quizId: existing.id,
        text: q.text,
        type: q.type,
        order: q.order,
      })),
    });
  } else {
    await prisma.quiz.create({
      data: {
        lessonId,
        questions: {
          create: questions.map((q) => ({
            text: q.text,
            type: q.type,
            order: q.order,
          })),
        },
      },
    });
  }

  revalidatePath(`/admin`);
}

export async function deleteQuiz(lessonId: string) {
  await requireAdmin();
  await prisma.quiz.delete({ where: { lessonId } });
  revalidatePath(`/admin`);
}