import { BasePage } from "@/app/base-page";
import Prose from "@/components/ui/prose";
import { Separator } from "@/components/ui/separator";
import { getPosts, getSinglePost, processHtmlContent } from "@/lib/blog/query";
import { Post, Author } from "@/types/blog";
import { Metadata } from "next";
import Image from "next/image";
import { notFound } from "next/navigation";

type PageProps = {
  params: Promise<{ slug: string }>;
  searchParams: Promise<{ [key: string]: string | string[] | undefined }>;
};

export async function generateMetadata({
  params,
}: PageProps): Promise<Metadata> {
  const slug = (await params).slug;

  const data = await getSinglePost({ slug });

  if (!data || !data.post) return {};

  return {
    title: data.post.title,
    description: data.post.description,
    twitter: {
      title: `${data.post.title}`,
      description: `${data.post.description}`,
      card: "summary_large_image",
      images: [
        {
          url: data.post.coverImage,
          width: "1200",
          height: "630",
          alt: data.post.title,
        },
      ],
    },
    openGraph: {
      type: "article",
      images: [
        {
          url: data.post.coverImage,
          width: "1200",
          height: "630",
          alt: data.post.title,
        },
      ],
      title: data.post.title,
      description: data.post.description,
      publishedTime: new Date(data.post.publishedAt).toISOString(),
      authors: data.post.authors.map((author: Author) => author.name),
    },
  };
}

export async function generateStaticParams() {
  const data = await getPosts();
  if (!data || !data.posts.length) return [];

  return data.posts.map((post) => ({
    slug: post.slug,
  }));
}

export default async function BlogPostPage({ params }: PageProps) {
  const slug = (await params).slug;
  const data = await getSinglePost({ slug });
  if (!data || !data.post) return notFound();

  const html = await processHtmlContent({ html: data.post.content });

  return (
    <BasePage>
      <PostHeader post={data.post} />
      <Separator />
      <PostContent html={html} />
    </BasePage>
  );
}

function PostHeader({ post }: { post: Post }) {
  const formattedDate = new Date(post.publishedAt).toLocaleDateString("en-US", {
    day: "numeric",
    month: "long",
    year: "numeric",
  });

  return (
    <>
      {post.coverImage && <PostCoverImage post={post} />}
      <PostMeta date={formattedDate} publishedAt={post.publishedAt} />
      <PostTitle title={post.title} />
      <PostAuthor author={post.authors[0]} />
    </>
  );
}

function PostCoverImage({ post }: { post: Post }) {
  return (
    <div className="relative aspect-video overflow-hidden rounded-lg">
      <Image
        src={post.coverImage}
        alt={post.title}
        loading="eager"
        fill
        className="rounded-lg object-cover"
      />
    </div>
  );
}

function PostMeta({ date, publishedAt }: { date: string; publishedAt: Date }) {
  return (
    <div className="flex items-center justify-center">
      <time dateTime={publishedAt.toString()}>{date}</time>
    </div>
  );
}

function PostTitle({ title }: { title: string }) {
  return (
    <h1 className="text-5xl font-bold tracking-tight md:text-4xl">{title}</h1>
  );
}

function PostAuthor({ author }: { author?: Author }) {
  if (!author) return null;

  return (
    <div className="flex items-center justify-center gap-2">
      <Image
        src={author.image}
        alt={author.name}
        width={36}
        height={36}
        loading="eager"
        className="aspect-square size-8 shrink-0 rounded-full"
      />
      <p className="text-muted-foreground">{author.name}</p>
    </div>
  );
}

function PostContent({ html }: { html: string }) {
  return (
    <section className="pt-8">
      <Prose html={html} />
    </section>
  );
}