#!/usr/bin/env node
/**
 * 全站 .vue 三段编译校验（模板 / 样式 / 脚本）
 *
 * 覆盖三类真实会打断 HBuilderX 打包的错误：
 *   1) 模板：表达式里未加引号的 `#hex`、可选链 `?.`、`:class` 带参方法调用等 →
 *      vue-template-compiler 编译即失败（小程序侧表现为白板）
 *   2) 样式：引用了 uni.scss 里不存在的 `$var` → dart-sass 报 Undefined variable
 *   3) 脚本：语法错误 / 截断 → node --check 失败
 *
 * 用法:
 *   node scripts/verify-vue-compile.js                 # 全量
 *   node scripts/verify-vue-compile.js a.vue b.vue     # 指定文件
 * 退出码: 0 全通过 / 1 有失败项
 */
const fs = require('fs')
const path = require('path')
const cp = require('child_process')
const os = require('os')

const ROOT = path.resolve(__dirname, '..')
const SKIP_DIRS = new Set(['node_modules', 'dist', 'unpackage', '.git', 'dist_bak_1792213156', '.tmp_equiv'])
const SKIP_FILES = new Set(['components/mp-html/node/node.vue']) // 第三方渲染器：自定义标签 + 双 script 结构

let sass = null
try { sass = require(path.join(ROOT, 'node_modules/sass')) } catch (e) { sass = null }
let compiler = null
try { compiler = require(path.join(ROOT, 'node_modules/vue-template-compiler')) } catch (e) { compiler = null }

const uniScss = fs.readFileSync(path.join(ROOT, 'uni.scss'), 'utf8')

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

function blocks(src) {
  // SFC 顶层块：标签必须位于行首（避免误命中脚本里的 /<style[\s\S]*?<\/style>/ 正则字面量）
  const out = { template: null, styles: [], scripts: [] }
  const tpl = src.match(/^<template[^>]*>([\s\S]*?)^<\/template>/m)
  if (tpl) out.template = tpl[1]
  for (const m of src.matchAll(/^<style([^>]*)>([\s\S]*?)^<\/style>/gm)) out.styles.push({ attrs: m[1] || '', code: m[2] || '' })
  for (const m of src.matchAll(/^<script([^>]*)>([\s\S]*?)^<\/script>/gm)) out.scripts.push({ attrs: m[1] || '', code: m[2] || '' })
  return out
}

const args = process.argv.slice(2)
const files = args.length ? args.map(a => path.resolve(ROOT, a)) : collect(ROOT)

const failures = []
function fail(file, kind, msg) {
  failures.push({ file, kind, msg: String(msg).replace(/\s+/g, ' ').slice(0, 220) })
}

let tplOk = 0, scssOk = 0, jsOk = 0

for (const abs of files) {
  const rel = path.relative(ROOT, abs).split(path.sep).join('/')
  if (SKIP_FILES.has(rel)) continue
  const src = fs.readFileSync(abs, 'utf8')
  const sfc = blocks(src)

  // 1) 模板
  if (compiler) {
    const tpl = sfc.template || ''
    if (tpl) {
      const res = compiler.compile(tpl)
      if (res.errors && res.errors.length) fail(rel, 'template', res.errors.join(' | '))
      else tplOk++
    } else tplOk++
  }

  // 2) 样式（SCSS 优先把 uni.scss 变量注入）
  if (sass) {
    const styleBlocks = sfc.styles
    let styleFailed = false
    for (const b of styleBlocks) {
      const attrs = b.attrs || ''
      const code = b.code || ''
      if (!/lang\s*=\s*["']scss["']/.test(attrs) && !/\$[a-zA-Z_-]/.test(code)) continue
      if (!/lang\s*=\s*["']scss["']/.test(attrs) && !/\$[a-zA-Z_-]/.test(code)) continue
      const attempts = [uniScss + '\n' + code, code]
      let ok = false
      let lastErr = null
      for (const candidate of attempts) {
        try {
          sass.compileString(candidate, { loadPaths: [ROOT], quietDeps: true, logger: { warn() {} } })
          ok = true
          break
        } catch (e) { lastErr = e }
      }
      if (!ok) {
        styleFailed = true
        fail(rel, 'style', lastErr && lastErr.message ? lastErr.message.split('\n')[0] : 'compile failed')
      }
    }
    if (!styleFailed) scssOk++
  }

  // 3) 脚本
  const scriptBlocks = sfc.scripts
  let jsFailed = false
  for (const b of scriptBlocks) {
    const tmp = path.join(os.tmpdir(), 'verify_' + Math.random().toString(36).slice(2) + '.js')
    fs.writeFileSync(tmp, b.code, 'utf8')
    try {
      cp.execFileSync(process.execPath, ['--check', tmp], { stdio: 'pipe' })
    } catch (e) {
      jsFailed = true
      fail(rel, 'script', String(e.stderr || '').split('\n').slice(0, 3).join(' '))
    } finally {
      try { fs.unlinkSync(tmp) } catch (e) {}
    }
  }
  if (!jsFailed) jsOk++
}

console.log('校验文件数: ' + files.length)
console.log('  模板通过: ' + tplOk + '   样式通过: ' + scssOk + '   脚本通过: ' + jsOk)
if (compiler === null) console.log('  !! 未找到 vue-template-compiler，跳过模板校验')
if (sass === null) console.log('  !! 未找到 sass，跳过样式校验')

if (failures.length) {
  console.log('\n失败 ' + failures.length + ' 项:')
  for (const f of failures) console.log('  [' + f.kind + '] ' + f.file + '\n      ' + f.msg)
  process.exit(1)
}
console.log('PASS')