import sequence from 'svelte-sequential-preprocessor';
import adapter from '@sveltejs/adapter-auto';
import { vitePreprocess } from '@sveltejs/kit/vite';
import { fileURLToPath } from 'node:url';
import { dirname } from 'node:path';
import { mdsvex, escapeSvelte } from 'mdsvex';
import shiki from 'shiki';
import remarkUnwrapImages from 'remark-unwrap-images';
import remarkToc from 'remark-toc';
import rehypeSlug from 'rehype-slug';

/** @type {import('@sveltejs/kit').Config}*/

/** @type {import('mdsvex').MdsvexOptions} */
const mdsvexOptions = {
  extensions: ['.md'],
  layout: {
    _: dirname(fileURLToPath(import.meta.url)) + '/src/mdsvex.svelte'
  },
  highlight: {
    highlighter: async (code, lang = 'text') => {
      const highlighter = await shiki.getHighlighter({ theme: 'poimandres' });
      const html = escapeSvelte(highlighter.codeToHtml(code, { lang }));
      return `{@html \`${html}\` }`;
    }
  },
  remarkPlugins: [remarkUnwrapImages, [remarkToc, { tight: true }]],
  rehypePlugins: [rehypeSlug]
};

const config = {
  kit: {
    // adapter-auto only supports some environments, see https://kit.svelte.dev/docs/adapter-auto for a list.
    // If your environment is not supported or you settled on a specific environment, switch out the adapter.
    // See https://kit.svelte.dev/docs/adapters for more information about adapters.
    adapter: adapter()
  },
  extensions: ['.svelte', '.md'],
  preprocess: sequence([vitePreprocess(), mdsvex(mdsvexOptions)])
};
export default config;