import type { Metadata } from "next";
import Link from "next/link";
import { PageHeader } from "@/components/page-header";
import { GlossaryClient } from "./glossary-client";
import { getAllGlossaryEntries } from "@/lib/api";
import { buildOgMeta } from "@/lib/og";

export function generateMetadata(): Metadata {
  return buildOgMeta({
    title: "Glossary",
    detail: "2,700+ Sanskrit & Vedic terms",
    quote:
      "A comprehensive glossary of Sanskrit and Vedic terms from the books of Śrīla Prabhupāda.",
  });
}

export default async function GlossaryPage() {
  const entries = await getAllGlossaryEntries();

  const letters = Array.from(
    new Set(
      entries
        .map((e) => e.term.charAt(0).toUpperCase())
        .filter((ch) => ch.length > 0),
    ),
  ).sort();

  const data = {
    title: "Glossary",
    description:
      "Sanskrit and Bengali terms used in the books of His Divine Grace A.C. Bhaktivedanta Swami Prabhupāda.",
    totalEntries: entries.length,
    letters,
    entries: entries.map((e) => ({
      term: e.term,
      definition: e.definition,
      definition_html: e.definitionHtml,
    })),
  };

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

      <main className="max-w-5xl mx-auto px-6 py-8">
        <GlossaryClient data={data} />
      </main>
    </div>
  );
}