import { readdir, readFile } from 'node:fs/promises'
import { extname, join, relative } from 'node:path'

const projectRoot = new URL('..', import.meta.url)
const sourceRoot = new URL('../src', import.meta.url)

const deprecatedPatterns = [
  {
    pattern: /\b(?:bg|border|ring|text)-(?:gray|indigo|purple|violet)-\d+\b/g,
    message: '使用项目约定的 slate/sky/自然绿色语义色，不要重新引入灰色或紫色系。',
  },
  {
    pattern: /\b(?:bg|border|ring|text)-(?:green|lime)-\d+\b/g,
    message: '绿色必须使用项目重映射后的 teal 品牌色或 emerald 成功色，不要引入默认 green/lime 荧光色。',
  },
  {
    pattern: /#(?:f0fdfa|ccfbf1|99f6e4|5eead4|2dd4bf|14b8a6|0d9488|0f766e|115e59|134e4a)\b/gi,
    message: '检测到旧版高饱和 teal 色值，请改用自然绿色设计令牌。',
  },
  {
    pattern: /#(?:c084fc|a855f7|9333ea|7e22ce)\b/gi,
    message: '检测到禁用的紫色硬编码，请改用 rose 或项目语义令牌。',
  },
  {
    pattern: /#(?:1f2937|9ca3af)\b/gi,
    message: '检测到默认 gray 调色板硬编码，请改用对应的 slate 色值或语义令牌。',
  },
  {
    pattern: /#60a5fa\b/gi,
    message: '检测到默认 blue-400 硬编码，请按用途改用 sky 或 amber 等项目语义色。',
  },
  {
    pattern: /text-xs uppercase tracking-\[0\.18em\] text-slate-500/g,
    message: '重复的小节标签应使用 oc-section-label。',
    vueOnly: true,
  },
  {
    pattern: /border border-slate-200 bg-slate-50 p-4/g,
    message: '标准内嵌信息面板应使用 oc-inset-panel。',
    vueOnly: true,
  },
  {
    pattern: /border-b border-sky-100 bg-\[linear-gradient\(180deg,#e0f2fe_0%,#f8fafc_100%\)\]/g,
    message: '标准页面头部应使用 oc-page-hero。',
    vueOnly: true,
  },
]

const styleSourceExtensions = new Set(['.vue', '.css', '.ts'])

async function collectStyleSourceFiles(directory) {
  const entries = await readdir(directory, { withFileTypes: true })
  const files = await Promise.all(entries.map(async (entry) => {
    const path = join(directory, entry.name)
    return entry.isDirectory() ? collectStyleSourceFiles(path) : [path]
  }))

  return files.flat().filter((path) => styleSourceExtensions.has(extname(path)))
}

function lineNumberAt(source, index) {
  return source.slice(0, index).split('\n').length
}

const violations = []

for (const file of await collectStyleSourceFiles(sourceRoot.pathname)) {
  const source = await readFile(file, 'utf8')

  for (const rule of deprecatedPatterns) {
    if (rule.vueOnly && extname(file) !== '.vue') continue

    for (const match of source.matchAll(rule.pattern)) {
      violations.push({
        file: relative(projectRoot.pathname, file),
        line: lineNumberAt(source, match.index),
        message: rule.message,
        value: match[0],
      })
    }
  }

  for (const match of source.matchAll(/(?:^|\s)class="([^"]+)"/gm)) {
    const classes = match[1].split(/\s+/)
    const panelModifier = classes.some((name) => name.startsWith('oc-panel-button--'))
    const primaryModifier = classes.some((name) => name.startsWith('oc-primary-button--'))

    if (panelModifier && !classes.includes('oc-panel-button')) {
      violations.push({
        file: relative(projectRoot.pathname, file),
        line: lineNumberAt(source, match.index),
        message: 'oc-panel-button 修饰类必须与基础类一起使用。',
        value: match[0],
      })
    }

    if (primaryModifier && !classes.includes('oc-primary-button')) {
      violations.push({
        file: relative(projectRoot.pathname, file),
        line: lineNumberAt(source, match.index),
        message: 'oc-primary-button 修饰类必须与基础类一起使用。',
        value: match[0],
      })
    }
  }
}

if (violations.length > 0) {
  console.error('样式体系检查失败：')
  for (const violation of violations) {
    console.error(`- ${violation.file}:${violation.line} ${violation.message} (${violation.value})`)
  }
  process.exitCode = 1
} else {
  console.log('样式体系检查通过。')
}