#!/usr/bin/env node
/**
 * 批量替换硬编码色值为 SCSS 令牌（CSS style 块内，零视觉风险）
 * 用法:
 *   node scripts/replace-hex-to-token.js --batch gray     # 仅灰阶
 *   node scripts/replace-hex-to-token.js --batch brand    # 仅品牌/状态色
 *   node scripts/replace-hex-to-token.js                 # 全部
 */
const fs = require('fs')
const path = require('path')

const ROOT = path.resolve(__dirname, '..')
const EXCLUDE_DIRS = new Set(['node_modules', 'dist', 'unpackage', '.git', 'docs'])

const ALL_RULES = [
  // ---- 灰阶（neutral）----
  ['#FFFFFF', '$app-surface'],
  ['#ffffff', '$app-surface'],
  ['#FFF',    '$app-surface'],
  ['#fff',    '$app-surface'],
  ['#333333', '$facade-text-strong'],
  ['#333',    '$facade-text-strong'],
  ['#666666', '$facade-text-body'],
  ['#666',    '$facade-text-body'],
  ['#999999', '$facade-text-muted'],
  ['#999',    '$facade-text-muted'],
  ['#F5F5F5', '$facade-fill-2'],
  ['#f5f5f5', '$facade-fill-2'],
  ['#F0F0F0', '$facade-fill'],
  ['#f0f0f0', '$facade-fill'],
  ['#FAFAFA', '$facade-fill-ghost'],
  ['#fafafa', '$facade-fill-ghost'],
  ['#F9FAFB', '$facade-fill-gray-50'],
  ['#f9fafb', '$facade-fill-gray-50'],
  ['#BBBBBB', '$facade-text-ghost-light'],
  ['#bbbbbb', '$facade-text-ghost-light'],
  ['#BBB',    '$facade-text-ghost-light'],
  ['#bbb',    '$facade-text-ghost-light'],
  ['#CCCCCC', '$facade-text-ghost'],
  ['#cccccc', '$facade-text-ghost'],
  ['#CCC',    '$facade-text-ghost'],
  ['#ccc',    '$facade-text-ghost'],
  ['#DDDDDD', '$facade-border-soft'],
  ['#dddddd', '$facade-border-soft'],
  ['#DDD',    '$facade-border-soft'],
  ['#ddd',    '$facade-border-soft'],
  ['#EEEEEE', '$facade-hairline-2'],
  ['#eeeeee', '$facade-hairline-2'],
  ['#EEE',    '$facade-hairline-2'],
  ['#eee',    '$facade-hairline-2'],
  // ---- 品牌/状态色（brand/status）----
  ['#F97316', '$brand-primary'],
  ['#f97316', '$brand-primary'],
  ['#FF8C42', '$dim-body'],
  ['#ff8c42', '$dim-body'],
  ['#FFF7ED', '$uni-primary-pale'],
  ['#fff7ed', '$uni-primary-pale'],
  ['#FB923C', '$brand-primary-light'],
  ['#fb923c', '$brand-primary-light'],
  ['#10B981', '$status-success'],
  ['#10b981', '$status-success'],
  ['#EF4444', '$status-danger'],
  ['#ef4444', '$status-danger'],
  ['#6366F1', '$dim-wisdom'],
  ['#6366f1', '$dim-wisdom'],
  ['#C62828', '$status-danger-strong-2'],
  ['#c62828', '$status-danger-strong-2'],
].sort((a, b) => b[0].length - a[0].length)

const GRAY_RULES   = ALL_RULES.filter(r => { const i = ALL_RULES.indexOf(r); return i < 30 })
const BRAND_RULES  = ALL_RULES.filter(r => { const i = ALL_RULES.indexOf(r); return i >= 30 })

const batch = process.argv.find(a => a.startsWith('--batch='))?.split('=')[1]
const rules = batch === 'brand' ? BRAND_RULES : batch === 'gray' ? GRAY_RULES : ALL_RULES
const label = batch === 'brand' ? '品牌/状态色' : batch === 'gray' ? '灰阶' : '全部'
console.log(`\n批次: ${label}  规则数: ${rules.length}\n`)

function walk(dir, out = []) {
  for (const name of fs.readdirSync(dir)) {
    if (EXCLUDE_DIRS.has(name)) continue
    const p = path.join(dir, name)
    const st = fs.statSync(p)
    if (st.isDirectory()) walk(p, out)
    else if (name.endsWith('.vue')) out.push(p)
  }
  return out
}

function countReplacements(text, rules) {
  let n = 0
  for (const [hex] of rules) {
    const escaped = hex.replace(/[.*+?^${}()|[\]\\]/g, '\\$&')
    n += (text.match(new RegExp(escaped + '(?![0-9a-fA-F])', 'g')) || []).length
  }
  return n
}

function applyRules(text, rules) {
  let result = text
  for (const [hex, token] of rules) {
    const escaped = hex.replace(/[.*+?^${}()|[\]\\]/g, '\\$&')
    result = result.replace(new RegExp(escaped + '(?![0-9a-fA-F])', 'g'), token)
  }
  return result
}

function processFile(filePath) {
  const src = fs.readFileSync(filePath, 'utf8')

  // 按 <style ...> 块拆分，只处理有目标 hex 的块
  const STYLE_RE = /(<style)([^>]*)>([\s\S]*?)(<\/style>)/gi
  let result = src
  let changed = false
  let totalRepl = 0
  let blocksModified = 0

  const matches = [...src.matchAll(STYLE_RE)]
  for (const match of matches) {
    const fullMatch = match[0]
    const tagOpen   = match[1]       // "<style"
    const attrs     = match[2]       // e.g. ' scoped lang="scss"'
    const body      = match[3]       // CSS content
    const tagClose  = match[4]       // "</style>"

    const replCount = countReplacements(body, rules)
    if (replCount === 0) continue

    const newBody = applyRules(body, rules)
    totalRepl += replCount

    // 若 <style> 没有 lang="scss"，补充上（SCSS 是 CSS 超集，安全）
    let newAttrs = attrs
    if (!/lang\s*=\s*["']scss["']/i.test(attrs)) {
      newAttrs = attrs.trim() ? attrs.trim() + ' lang="scss"' : ' lang="scss"'
    }

    const newBlock = `${tagOpen}${newAttrs}>${newBody}${tagClose}`
    if (newBlock !== fullMatch) {
      result = result.split(fullMatch).join(newBlock)
      changed = true
      blocksModified++
    }
  }

  if (changed) {
    fs.writeFileSync(filePath, result, 'utf8')
    return { changed: true, replacements: totalRepl, blocks: blocksModified }
  }
  return { changed: false, replacements: 0, blocks: 0 }
}

function main() {
  const files = walk(ROOT)
  let totalChanged = 0
  let totalReplacements = 0
  let totalBlocks = 0
  const log = []

  for (const file of files) {
    const rel = path.relative(ROOT, file)
    const result = processFile(file)
    if (result.changed) {
      totalChanged++
      totalReplacements += result.replacements
      totalBlocks += result.blocks
      log.push(`${result.replacements.toString().padStart(4)}  ${rel}`)
    }
  }

  console.log(`\n=== 替换完成 (${label}) ===`)
  console.log(`文件变更: ${totalChanged}`)
  console.log(`style 块修改: ${totalBlocks}`)
  console.log(`替换次数: ${totalReplacements}`)
  console.log('')
  log.sort((a, b) => parseInt(b.split(' ')[0]) - parseInt(a.split(' ')[0]))
  for (const line of log.slice(0, 50)) console.log(line)
  if (log.length > 50) console.log(`... 共 ${log.length} 个文件`)
}

main()