import { defineConfig, AstroUserConfig } from "astro/config";

import remarkUnwrapImages from "remark-unwrap-images";
import remarkGfm from "remark-gfm";
import remarkEmbedder, { RemarkEmbedderOptions } from "@remark-embedder/core";
import oembedTransformer from "@remark-embedder/transformer-oembed";
import * as TwitchTransformer from "gatsby-remark-embedder/dist/transformers/Twitch.js";
import remarkTwoslash from "remark-shiki-twoslash";
import { UserConfigSettings } from "shiki-twoslash";
import rehypeSlug from "rehype-slug-custom-id";
import { parent } from "./src/constants/site-config";
import { rehypeHeaderText } from "./src/utils/markdown/rehype-header-text";
import { rehypeTabs } from "./src/utils/markdown/tabs";
import { rehypeAstroImageMd } from "./src/utils/markdown/rehype-astro-image-md";
import { rehypeUnicornElementMap } from "./src/utils/markdown/rehype-unicorn-element-map";
import { rehypeExcerpt } from "./src/utils/markdown/rehype-excerpt";
import { rehypeUnicornPopulatePost } from "./src/utils/markdown/rehype-unicorn-populate-post";
import { rehypeWordCount } from "./src/utils/markdown/rehype-word-count";
import { rehypeUnicornGetSuggestedPosts } from "./src/utils/markdown/rehype-unicorn-get-suggested-posts";
import { rehypeUnicornIFrameClickToRun } from "./src/utils/markdown/rehype-unicorn-iframe-click-to-run";
import copy from "rollup-plugin-copy";
import preact from "@astrojs/preact";
import sitemap from "@astrojs/sitemap";
import { EnumChangefreq as ChangeFreq } from "sitemap";
import { siteUrl } from "./src/constants/site-config";

// TODO: Create types
import behead from "remark-behead";
import rehypeRaw from "rehype-raw";

import image from "@astrojs/image";
import mdx from "@astrojs/mdx";
import path from "path";

import svgr from "vite-plugin-svgr";

export default defineConfig({
	site: siteUrl,
	integrations: [
		image(),
		preact(),
		mdx(),
		sitemap({
			changefreq: ChangeFreq.DAILY,
			priority: 0.7,
			lastmod: new Date(),
			serialize({ url, ...rest }) {
				return {
					// remove trailing slash from sitemap URLs
					url: url.replace(/\/$/g, ""),
					...rest,
				};
			},
		}),
	],
	vite: {
		ssr: {
			external: ["svgo"],
		},
		plugins: [
			svgr(),
			{
				...copy({
					hook: "options",
					flatten: false,
					targets: [
						{
							src: "content/**/*",
							dest: "public/content",
						},
					],
				}),
				enforce: "pre",
			},
		],
	},
	markdown: {
		mode: "md",
		syntaxHighlight: false,
		smartypants: false,
		gfm: false,
		remarkPlugins: [
			remarkGfm,
			// Remove complaining about "div cannot be in p element"
			remarkUnwrapImages,
			/* start remark plugins here */
			[behead, { depth: 1 }],
			[
				remarkEmbedder as any,
				{
					transformers: [oembedTransformer, [TwitchTransformer, { parent }]],
				} as RemarkEmbedderOptions,
			],
			[
				remarkTwoslash,
				{
					themes: ["css-variables"],
				} as UserConfigSettings,
			],
		],
		rehypePlugins: [
			rehypeUnicornPopulatePost,
			rehypeUnicornGetSuggestedPosts,
			// This is required to handle unsafe HTML embedded into Markdown
			[rehypeRaw, { passThrough: [`mdxjsEsm`] }],
			// Do not add the tabs before the slug. We rely on some of the heading
			// logic in order to do some of the subheading logic
			[
				rehypeSlug,
				{
					maintainCase: true,
					removeAccents: true,
					enableCustomId: true,
				},
			],
			[
				rehypeTabs,
				{
					injectSubheaderProps: true,
					tabSlugifyProps: {
						enableCustomId: true,
					},
				},
			],
			rehypeHeaderText,
			/**
			 * Insert custom HTML generation code here
			 */
			[
				rehypeAstroImageMd,
				{
					maxHeight: 768,
					maxWidth: 768,
				},
			],
			rehypeUnicornIFrameClickToRun,
			rehypeUnicornElementMap,
			[
				rehypeExcerpt,
				{
					maxLength: 150,
				},
			],
			rehypeWordCount,
		],
	} as AstroUserConfig["markdown"] as never,
});