import { Resvg } from "@resvg/resvg-js";
import type { APIContext, InferGetStaticPropsType } from "astro";
import satori, { type SatoriOptions } from "satori";
import { html } from "satori-html";
import RobotoMonoBold from "@/assets/roboto-mono-700.ttf";
import RobotoMono from "@/assets/roboto-mono-regular.ttf";
import { getAllPosts } from "@/data/post";
import { siteConfig } from "@/site.config";
import { getFormattedDate } from "@/utils/date";

const ogOptions: SatoriOptions = {
	// debug: true,
	fonts: [
		{
			data: Buffer.from(RobotoMono),
			name: "Roboto Mono",
			style: "normal",
			weight: 400,
		},
		{
			data: Buffer.from(RobotoMonoBold),
			name: "Roboto Mono",
			style: "normal",
			weight: 700,
		},
	],
	height: 630,
	width: 1200,
};

const markup = (title: string, pubDate: string) =>
	html`<div tw="flex flex-col w-full h-full bg-[#1d1f21] text-[#c9cacc]">
		<div tw="flex flex-col flex-1 w-full p-10 justify-center">
			<p tw="text-2xl mb-6">${pubDate}</p>
			<h1 tw="text-6xl font-bold leading-snug text-white">${title}</h1>
		</div>
		<div tw="flex items-center justify-between w-full p-10 border-t border-[#2bbc89] text-xl">
			<div tw="flex items-center">
				<svg height="60" fill="none" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 272 480">
					<path
						d="M181.334 93.333v-40L226.667 80v40l-45.333-26.667ZM136.001 53.333 90.667 26.667v426.666L136.001 480V53.333Z"
						fill="#B04304"
					></path>
					<path
						d="m136.001 119.944 45.333-26.667 45.333 26.667-45.333 26.667-45.333-26.667ZM90.667 26.667 136.001 0l45.333 26.667-45.333 26.666-45.334-26.666ZM181.334 53.277l45.333-26.666L272 53.277l-45.333 26.667-45.333-26.667ZM0 213.277l45.333-26.667 45.334 26.667-45.334 26.667L0 213.277ZM136 239.944l-45.333-26.667v53.333L136 239.944Z"
						fill="#FF5D01"
					></path>
					<path
						d="m136 53.333 45.333-26.666v120L226.667 120V80L272 53.333V160l-90.667 53.333v240L136 480V306.667L45.334 360V240l45.333-26.667v53.334L136 240V53.333Z"
						fill="#53C68C"
					></path>
					<path d="M45.334 240 0 213.334v120L45.334 360V240Z" fill="#B04304"></path>
				</svg>
				<p tw="ml-3 font-semibold">${siteConfig.title}</p>
			</div>
			<p>by ${siteConfig.author}</p>
		</div>
	</div>`;

type Props = InferGetStaticPropsType<typeof getStaticPaths>;

export async function GET(context: APIContext) {
	const { pubDate, title } = context.props as Props;

	const postDate = getFormattedDate(pubDate, {
		month: "long",
		weekday: "long",
	});
	const svg = await satori(markup(title, postDate), ogOptions);
	const png = new Resvg(svg).render().asPng();
	return new Response(png, {
		headers: {
			"Cache-Control": "public, max-age=31536000, immutable",
			"Content-Type": "image/png",
		},
	});
}

export async function getStaticPaths() {
	const posts = await getAllPosts(true); // Include archived posts for OG image generation
	return posts
		.filter(({ data }) => !data.ogImage)
		.map((post) => ({
			params: { slug: post.id },
			props: {
				pubDate: post.data.updatedDate ?? post.data.publishDate,
				title: post.data.title,
			},
		}));
}