"use server";

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

export async function toggleLessonProgress(lessonId: string, slug: string) {
  const session = await auth.api.getSession({ headers: await headers() });
  if (!session) throw new Error("Unauthorized");

  const existing = await prisma.lessonProgress.findUnique({
    where: { userId_lessonId: { userId: session.user.id, lessonId } },
  });

  if (existing) {
    await prisma.lessonProgress.delete({
      where: { userId_lessonId: { userId: session.user.id, lessonId } },
    });
  } else {
    await prisma.lessonProgress.create({
      data: { userId: session.user.id, lessonId },
    });
  }

  revalidatePath(`/courses/${slug}/lessons/${lessonId}`);
  revalidatePath(`/courses/${slug}`);
  revalidatePath("/dashboard");
}