// 用法：node scripts/generate-language-icons.mjs /path/to/@iconify-json/vscode-icons
// 来源：@iconify-json/vscode-icons 1.2.76（MIT）；运行时不会发起网络请求。
import { readFileSync, writeFileSync } from 'node:fs'
import { resolve } from 'node:path'
import { bundledLanguagesInfo } from 'shiki/langs'

const source = process.argv[2]
if (!source) throw new Error('Provide the extracted vscode-icons package directory')
const data = JSON.parse(readFileSync(resolve(source, 'icons.json'), 'utf8'))
const overrides = {
  ahk: 'autohotkey', ahk2: 'autohotkey', asm: 'assembly', bat: 'bat',
  'angular-html': 'angular', 'angular-ts': 'angular',
  'common-lisp': 'lisp', 'emacs-lisp': 'lisp',
  'fortran-fixed-form': 'fortran', 'fortran-free-form': 'fortran',
  'git-commit': 'git', 'git-rebase': 'git',
  jsonc: 'json', jsonl: 'json', shellscript: 'shell', shellsession: 'shell',
  jsx: 'reactjs', tsx: 'reactts', latex: 'tex', bibtex: 'bibtex',
  'objective-c': 'objectivec', 'objective-cpp': 'objectivecpp',
  dart: 'dartlang', d: 'dlang', v: 'vlang', gdshader: 'godot',
  fish: 'shell', 'ssh-config': 'shell', 'vue-html': 'vue', 'vue-vine': 'vue',
  'html-derivative': 'html', qss: 'qt', rbs: 'ruby',
}
const groups = new Map()
const unmatched = []
for (const info of [...bundledLanguagesInfo, { id: 'text', name: 'Text' }]) {
  const candidates = [overrides[info.id], info.id, ...(info.aliases ?? []), info.name.toLowerCase().replace(/\s+/g, '')].filter(Boolean)
  const icon = candidates.map(name => `file-type-${name}`).find(name => data.icons[name])
  if (!icon) { unmatched.push(info.id); continue }
  const ids = groups.get(icon) ?? []
  ids.push(info.id)
  groups.set(icon, ids)
}
const base = '.milkdown-host .language-list-item[data-language]'
const svgUrl = icon => {
  const item = data.icons[icon]
  const svg = `<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 ${item.width ?? data.width ?? 32} ${item.height ?? data.height ?? 32}">${item.body}</svg>`
  return `url("data:image/svg+xml,${encodeURIComponent(svg)}")`
}
let css = `/* 由 scripts/generate-language-icons.mjs 自动生成。VSCode Icons 采用 MIT 许可证；详情见 language-icons-LICENSE.txt。 */\n${base} { display: flex; align-items: center; gap: 8px; }\n${base}::before { content: ''; flex: 0 0 20px; width: 20px; height: 20px; background: center / contain no-repeat ${svgUrl('default-file')}; }\n`
for (const [icon, ids] of groups) {
  css += ids.map(id => `${base}[data-language="${id}"]::before`).join(',\n') + ` { background-image: ${svgUrl(icon)}; }\n`
}
writeFileSync(new URL('../src/features/editor/language-icons.css', import.meta.url), css)
writeFileSync(new URL('../src/features/editor/language-icons-LICENSE.txt', import.meta.url), readFileSync(resolve(source, 'license.txt')))
console.log(`${bundledLanguagesInfo.length + 1 - unmatched.length} languages mapped; generic file icon for: ${unmatched.join(', ')}`)