export const dynamic = "force-dynamic";

import Link from "next/link";
import { notFound } from "next/navigation";
import {
  getMagazineMeta,
  slugToBookCode,
  type MagazineChapterEntry,
} from "@/lib/magazines";
import { PageHeader } from "@/components/page-header";
import { Card, CardContent } from "@/components/ui/card";

export default async function MagazineIndexPage({
  params,
}: {
  params: Promise<{ slug: string }>;
}) {
  const { slug } = await params;
  const bookCode = slugToBookCode(slug);
  const meta = await getMagazineMeta(bookCode);
  if (!meta) notFound();

  return (
    <div className="min-h-screen bg-background">
      <PageHeader>
        <Link
          href="/magazines"
          className="text-sm text-muted-foreground hover:text-foreground transition-colors"
        >
          &larr; Magazines
        </Link>
        <h1 className="mt-3 text-3xl font-bold text-foreground">
          {meta.title}
        </h1>
        <p className="mt-1 text-muted-foreground">{meta.author}</p>
      </PageHeader>

      <main className="max-w-5xl mx-auto px-6 py-8 space-y-8">
        {meta.description && (
          <p className="text-muted-foreground">{meta.description}</p>
        )}

        {meta.chapters.map((ch: MagazineChapterEntry, idx: number) => {
          if ("slug" in ch && !("subChapters" in ch)) {
            return (
              <Card key={ch.slug}>
                <CardContent className="p-0">
                  <Link
                    href={`/magazines/${slug}/${ch.slug}`}
                    className="flex items-center px-5 py-4 hover:bg-muted transition-colors"
                  >
                    <p className="font-medium text-foreground">{ch.title}</p>
                  </Link>
                </CardContent>
              </Card>
            );
          }

          if ("subChapters" in ch) {
            const group = ch as {
              title: string;
              subChapters: { slug: string; title: string }[];
            };
            return (
              <div key={`group-${idx}`}>
                <h2 className="text-sm font-bold uppercase tracking-wider text-muted-foreground mb-3">
                  {group.title}
                </h2>
                <Card className="divide-y divide-border">
                  <CardContent className="p-0">
                    <ul className="divide-y divide-border">
                      {group.subChapters.map((sc) => (
                        <li key={sc.slug}>
                          <Link
                            href={`/magazines/${slug}/${sc.slug}`}
                            className="flex items-center px-5 py-3 hover:bg-muted transition-colors"
                          >
                            <p className="text-sm font-medium text-foreground">
                              {sc.title}
                            </p>
                          </Link>
                        </li>
                      ))}
                    </ul>
                  </CardContent>
                </Card>
              </div>
            );
          }

          return null;
        })}
      </main>
    </div>
  );
}