// @ts-check
import { defineConfig } from 'astro/config'
import mdx from '@astrojs/mdx'
import { satteri } from '@astrojs/markdown-satteri'
import beautify from 'js-beautify'
import { execFileSync } from 'node:child_process'
import { globSync, readFileSync, writeFileSync } from 'node:fs'
import { devNull } from 'node:os'
import { fileURLToPath } from 'node:url'
import { copyAssets } from '../.build/copy-assets'

/** @param {string} p */
const path = (p) => fileURLToPath(new URL(p, import.meta.url))

/**
 * After build, format page HTML with prettier (users copy it 1:1).
 * @returns {import('astro').AstroIntegration}
 */
function prettifyHtml() {
  return {
    name: 'prettify-html',
    hooks: {
      'astro:build:done': async ({ dir, logger }) => {
        const outDir = fileURLToPath(dir)
        // dist/preview/ and dist/dist/ are copy-assets.mjs's copies of public/{preview,dist}
        // (demo css/js and @tabler/core's dist, including vendored libs) — not pages, and
        // some vendored libs ship their own malformed docs/*.html that trips the parser below.
        /** @param {string} file */
        const isVendorCopy = (file) => file.includes(`${outDir}preview/`) || file.includes(`${outDir}dist/`)
        // Astro appends "overflow-x: auto" to the shiki <pre> style — the
        // Eleventy pipeline doesn't have it and HTML is the product: restore 1:1.
        // node:fs is imported statically — a dynamic import() here would go
        // through Vite's module runner, which is already closed by the time
        // the astro:build:done hook runs (the config is bundled by vite-node
        // because it imports a .ts module).
        for (const file of globSync(`${outDir}**/*.html`, { exclude: isVendorCopy })) {
          const content = readFileSync(file, 'utf8')
          const cleaned = content.replaceAll('; overflow-x: auto;', '')
          if (cleaned !== content) writeFileSync(file, cleaned)
        }
        execFileSync(
          'npx',
          [
            'prettier',
            '--write',
            '--parser',
            'html',
            // Prettier's default ignore-path is [.gitignore, .prettierignore], and both
            // list "dist" (needed elsewhere so normal lint/format passes skip build
            // output) — that silently no-ops this pass on the very directory it targets.
            // Point at devNull to opt this one deliberate pass out of those ignores.
            '--ignore-path',
            devNull,
            `${outDir}**/*.html`,
            `!${outDir}preview/**`,
            `!${outDir}dist/**`,
          ],
          { stdio: 'inherit' },
        )
        logger.info('HTML formatted with prettier')
      },
    },
  }
}

// https://astro.build/config
export default defineConfig({
  // pages live at the package root (./pages) — all components/lib/data are
  // shared (see the @shared alias)
  srcDir: '.',
  server: {
    port: 3000,
    // bind on all interfaces so the dev server is reachable from Docker
    // port mappings and other devices on the local network
    host: true,
  },
  vite: {
    resolve: {
      alias: {
        // Demo data in shared/data (single source of truth).
        '@data': fileURLToPath(new URL('../shared/data', import.meta.url)),
        // Components/lib shared with docs.
        '@shared': fileURLToPath(new URL('../shared', import.meta.url)),
        '@ui': fileURLToPath(new URL('../shared/ui', import.meta.url)),
        '@components': fileURLToPath(new URL('../shared/components', import.meta.url)),
        // Used by @shared/lib/docs-children's glob.
        '@pages': fileURLToPath(new URL('./pages', import.meta.url)),
      },
    },
  },
  build: {
    // Emit sign-in.html instead of sign-in/index.html (HTML is the product).
    format: 'file',
  },
  // Keep readable HTML; prettier formats after the build.
  compressHTML: false,
  integrations: [
    copyAssets({
      repo: path('..'),
      publicDir: path('./public'),
      copies: [
        {
          // @tabler/core dist (css/js/fonts/img/libs) — same as the Eleventy passthrough.
          // Fallback keeps current assets if core rebuilds dist mid-copy in turbo dev.
          from: path('./node_modules/@tabler/core/dist'),
          to: path('./public/dist'),
          label: '@tabler/core',
          allowDestinationFallback: true,
        },
        {
          // demo css/js built by this package's sass/vite pipeline. Source is
          // tmp-assets/ (NOT dist/) on purpose — dist/ is Astro's own build output,
          // and copying from a path Astro also writes to caused unbounded growth
          // across repeated builds. See preview/.build/vite.config.mts.
          from: path('./tmp-assets'),
          to: path('./public/preview'),
          label: '@tabler/preview',
        },
        {
          // static assets (photos, avatars, tracks, brand svgs...). The real source,
          // because preview/static is a symlink that may not survive deployment packaging.
          from: path('../shared/static'),
          to: path('./public/static'),
          label: 'shared assets',
        },
        // favicons (source assets of @tabler/preview)
        { from: path('./assets/favicon.ico'), to: path('./public/favicon.ico'), label: '@tabler/preview' },
        { from: path('./assets/favicon-dev.ico'), to: path('./public/favicon-dev.ico'), label: '@tabler/preview' },
      ],
      // Watch the real core/dist, not the node_modules symlink the startup copy
      // reads from — same directory.
      syncDirs: [
        { from: path('../core/dist'), to: path('./public/dist') },
        { from: path('../shared/static'), to: path('./public/static') },
      ],
      // watch-css/watch-js write straight into public/preview — the file is already
      // in place, but Astro does not reload the browser on public/ changes.
      reloadDirs: [path('./public/preview')],
    }),
    mdx(),
    prettifyHtml(),
  ],
  markdown: {
    // No typographic quote rewriting.
    processor: satteri({ features: { smartPunctuation: false } }),
    shikiConfig: {
      theme: 'github-dark',
      transformers: [
        {
          // Beautify html fences before highlighting.
          preprocess(code) {
            return this.options.lang === 'html' ? beautify.html(code, { indent_size: 2, wrap_line_length: 80 }) : code
          },
          // Keep shiki classes only (drop Astro's astro-code / data-language).
          pre(node) {
            node.properties.class = 'shiki github-dark'
            delete node.properties.dataLanguage
          },
        },
      ],
    },
  },
})