// app/courses/[slug]/page.tsx

export const dynamic = "force-dynamic";

export async function generateMetadata({
  params,
}: {
  params: Promise<{ slug: string }>;
}) {
  const { slug } = await params;
  const supabase = createStaticClient();
  const course = await getCourseBySlug(slug, supabase);

  if (!course) {
    return { title: "Course Not Found" };
  }

  return {
    title: `${course.name} | ${APP_NAME}`,
    description: course.description,
  };
}

export default async function CourseDetailPage({
  params,
}: {
  params: Promise<{ slug: string }>;
}) {
  const { slug } = await params;
  const course = await getCourseBySlug(slug);

  if (!course) {
    notFound();
  }

  const user = await getUser();
  const supabase = await createClient();

  // Get user profile if authenticated
  let profile = null;
  if (user) {
    const { data } = await supabase
      .from("profiles")
      .select("role")
      .eq("id", user.id)
      .single();
    profile = data;
  }

  // Check if user is enrolled
  let isEnrolled = false;
  if (user) {
    const { data: dbCourse } = await supabase
      .from("courses")
      .select("id")
      .eq("slug", slug)
      .maybeSingle();

    if (dbCourse) {
      const { data: enrollment } = await supabase
        .from("enrollments")
        .select("id, expires_at")
        .eq("user_id", user.id)
        .eq("course_id", dbCourse.id)
        .eq("status", "active")
        .or(`expires_at.is.null,expires_at.gt.${new Date().toISOString()}`)
        .maybeSingle();

      isEnrolled = !!(
        !!enrollment ||
        (profile?.role === "premium" && course.isFreeForPremium)
      );
    }
  }

  if (isEnrolled) {
    redirect(`/dashboard/courses/${slug}`);
  }

  return <CourseView course={course} />;
}