const fs = require('fs')
const path = require('path')

const root = path.resolve(__dirname, '..')
const reportDir = path.join(root, 'reports')
const sourceRoots = ['pages', 'components', 'windows', 'js_sdk', 'App.vue', 'main.js']
const excludedDirs = new Set(['.git', 'node_modules', 'unpackage', '.zcode'])
const sourceExtensions = new Set(['.vue', '.js', '.json'])

function walk(target) {
  const absolute = path.join(root, target)
  if (!fs.existsSync(absolute)) return []
  const stat = fs.statSync(absolute)
  if (stat.isFile()) return [absolute]
  const files = []
  for (const entry of fs.readdirSync(absolute, { withFileTypes: true })) {
    if (entry.isDirectory() && excludedDirs.has(entry.name)) continue
    const child = path.join(absolute, entry.name)
    if (entry.isDirectory()) files.push(...walk(path.relative(root, child)))
    else if (sourceExtensions.has(path.extname(entry.name))) files.push(child)
  }
  return files
}

function relative(file) {
  return path.relative(root, file).replace(/\\/g, '/')
}

function lineOf(text, index) {
  return text.slice(0, index).split(/\r?\n/).length
}

function addFinding(list, severity, file, line, message, evidence = '') {
  list.push({ severity, file: relative(file), line, message, evidence })
}

function readJson(file) {
  try {
    return JSON.parse(stripJsonComments(fs.readFileSync(file, 'utf8')))
  } catch (error) {
    return { __parseError: error.message }
  }
}

// B1-2: schema 允许 uniCloud JSONC 注释头，比较前剥离
function stripJsonComments(text) {
  let out = ''
  let i = 0
  const n = text.length
  let inStr = false
  while (i < n) {
    const c = text[i]
    if (inStr) {
      out += c
      if (c === '\\') { out += text[i + 1] || ''; i += 2; continue }
      if (c === '"') inStr = false
      i++
      continue
    }
    if (c === '"') { inStr = true; out += c; i++; continue }
    if (c === '/' && text[i + 1] === '/') {
      const end = text.indexOf('\n', i)
      const stop = end === -1 ? n : end
      out += ' '.repeat(stop - i)
      i = stop
      continue
    }
    if (c === '/' && text[i + 1] === '*') {
      const end = text.indexOf('*/', i + 2)
      const stop = end === -1 ? n : end + 2
      const skipped = text.slice(i, stop)
      out += skipped.replace(/[^\n]/g, ' ')
      i = stop
      continue
    }
    out += c
    i++
  }
  return out
}

function collectSchemas() {
  const schemaFiles = []
  for (const base of ['uniCloud-alipay/database', 'uni_modules']) {
    schemaFiles.push(...walk(base).filter(file => file.endsWith('.schema.json')))
  }
  const schemas = new Map()
  for (const file of schemaFiles) {
    const name = path.basename(file, '.schema.json')
    schemas.set(name, { file: relative(file), schema: readJson(file) })
  }
  return schemas
}

function collectFiles() {
  return sourceRoots.flatMap(walk).filter(file => !file.endsWith('.schema.json'))
}

function checkVue3(files, findings) {
  for (const file of files.filter(file => file.endsWith('.vue'))) {
    const text = fs.readFileSync(file, 'utf8')
    for (const pattern of [
      { re: /\s(slot|show-iconn)=/g, message: '发现 Vue3 兼容性标记或拼写错误' },
      { re: /<[^>]+\sslot="[^" está]+"/g, message: '发现旧版具名插槽语法' }
    ]) {
      let match
      while ((match = pattern.re.exec(text))) {
        addFinding(findings, 'error', file, lineOf(text, match.index), pattern.message, match[0].trim())
      }
    }
  }
}

function checkSensitiveFields(files, findings) {
  const sensitive = /\b(password|token|password_secret|secret_key|private_key)\b/i
  for (const file of files.filter(file => file.endsWith('.vue'))) {
    const text = fs.readFileSync(file, 'utf8')
    const isList = /<unicloud-db|download-excel/.test(text) && /list\.vue$/.test(file)
    if (!isList) continue
    const lines = text.split(/\r?\n/)
    lines.forEach((line, index) => {
      if (sensitive.test(line)) {
        addFinding(findings, 'error', file, index + 1, '列表页面包含敏感字段，禁止直接查询、展示或导出', line.trim())
      }
    })
  }
}

function checkCollectionContracts(files, schemas, findings, warnings) {
  // B1-2: 只认 <unicloud-db> 主标签的字面量 collection；辅助集合（uni-data-select 等）
  // 只登记不比对，避免噪音 warning。:collection="变量" 绑定由 script 区首个定义解析。
  const udbRe = /<unicloud-db\b[^>]*>/g
  const udbCollectionRe = /collectionList\s*:\s*["']([^"']+)["']|collection\s*:\s*["']([^"']+)["']/
  const scriptRe = /collectionList\s*:\s*["']([^"']+)["']/
  for (const file of files.filter(file => file.endsWith('.vue') || file.endsWith('.js'))) {
    const text = fs.readFileSync(file, 'utf8')
    const mains = new Set()
    let um
    while ((um = udbRe.exec(text))) {
      const cm = udbCollectionRe.exec(um[0])
      if (cm) mains.add(cm[1] || cm[2])
    }
    if (!mains.size) {
      const sm = scriptRe.exec(text)
      if (sm) mains.add(sm[1])
    }
    for (const name of mains) {
      if (name.startsWith('uni-') || name.startsWith('opendb-') || name.includes('comment') || name === 'cms-temp') {
        if (!schemas.has(name)) {
          addFinding(warnings, 'warning', file, 1, '页面引用的主集合未在本地 schema 中发现', name)
        }
      }
    }
  }
}

function checkKnownPatterns(files, findings) {
  const patterns = [
    { re: /if\s*\(this\.where\._id\)/, message: '使用不存在的 where._id 判断加载条件' },
    { re: /const\s+queryRe\s*=\s*new\s+RegExp\(query,\s*['"]i['"]\)/, message: '用户搜索输入未转义正则特殊字符' },
    { re: /field\.hasOwnProperty\(['"]value['"]\)/, message: '疑似使用未定义变量 field' },
    { re: /uploadSuccessTaskNames\.push\(name\)/, message: '疑似使用未定义变量 name' },
    { re: /:emptyText="error\.message\s*\|\|\s*loading\s*\?/, message: 'emptyText 条件优先级可能错误' }
  ]
  for (const file of files) {
    const text = fs.readFileSync(file, 'utf8')
    for (const { re, message } of patterns) {
      const match = re.exec(text)
      if (match) addFinding(findings, 'error', file, lineOf(text, match.index), message, match[0])
    }
  }
}

function checkJsonParse(files, findings) {
  for (const file of files.filter(file => file.endsWith('.json'))) {
    const parsed = readJson(file)
    if (parsed.__parseError) addFinding(findings, 'error', file, 1, 'JSON 解析失败', parsed.__parseError)
  }
}

function makeReport(findings, warnings, schemas) {
  const report = {
    generatedAt: new Date().toISOString(),
    project: 'uni-admin 2.5.1',
    schemaCount: schemas.size,
    errors: findings,
    warnings,
    summary: {
      errors: findings.length,
      warnings: warnings.length,
      status: findings.length ? 'failed' : 'passed'
    }
  }
  fs.mkdirSync(reportDir, { recursive: true })
  fs.writeFileSync(path.join(reportDir, 'quality-report.json'), JSON.stringify(report, null, 2) + '\n')
  const lines = [
    '# Quality report',
    '',
    // G1收尾：去掉 Generated 时间戳行 —— 每次跑门禁必变导致 reports/*.md 常脏；
    // 时间戳仍保留在 gitignored 的 quality-report.json（generatedAt）中备查
    `- Status: **${report.summary.status}**`,
    `- Errors: ${report.summary.errors}`,
    `- Warnings: ${report.summary.warnings}`,
    `- Schemas indexed: ${report.schemaCount}`,
    ''
  ]
  for (const [title, list] of [['Errors', findings], ['Warnings', warnings]]) {
    lines.push(`## ${title}`, '')
    if (!list.length) lines.push('None', '')
    for (const item of list) lines.push(`- **${item.file}:${item.line}** ${item.message}${item.evidence ? ` — \`${item.evidence}\`` : ''}`)
    lines.push('')
  }
  fs.writeFileSync(path.join(reportDir, 'quality-report.md'), lines.join('\n'))
  return report
}

function main() {
  const files = collectFiles()
  const schemas = collectSchemas()
  const findings = []
  const warnings = []
  checkJsonParse(files, findings)
  checkVue3(files, findings)
  checkSensitiveFields(files, findings)
  checkKnownPatterns(files, findings)
  checkCollectionContracts(files, schemas, findings, warnings)
  const report = makeReport(findings, warnings, schemas)
  console.log(JSON.stringify(report.summary))
  if (findings.length) process.exitCode = 1
}

main()