const fs = require('node:fs')
const path = require('node:path')
const { spawnSync } = require('node:child_process')
const {
  isTextBuildFile,
  resolveH5BuildPolicy,
  tencentMapKeyPlaceholder
} = require('./finalize-h5-build-policy.cjs')

const projectRoot = path.resolve(__dirname, '..')
const h5Root = path.join(projectRoot, 'dist', 'build', 'h5')
const placeholder = tencentMapKeyPlaceholder
const badPatterns = [
  'http://1.92.206.90:9000',
  '1.92.206.90',
  'guide.whaoyue.com',
  placeholder
]
const {
  allowPlaceholder,
  requireTencentMapKey,
  tencentMapKey
} = resolveH5BuildPolicy({
  args: process.argv.slice(2),
  projectRoot
})

require('./copy-h5-nav-assets.cjs')

if (!fs.existsSync(h5Root)) {
  throw new Error(`H5 build output not found: ${h5Root}`)
}

const walkFiles = (dir, files = []) => {
  for (const entry of fs.readdirSync(dir, { withFileTypes: true })) {
    const filePath = path.join(dir, entry.name)

    if (entry.isDirectory()) {
      walkFiles(filePath, files)
      continue
    }

    if (entry.isFile()) {
      files.push(filePath)
    }
  }

  return files
}

const allFiles = walkFiles(h5Root)
const textFiles = allFiles.filter(isTextBuildFile)
const placeholderFiles = textFiles.filter((file) => fs.readFileSync(file, 'utf8').includes(placeholder))
const hasUsableTencentMapKey = tencentMapKey.length > 0
const missingTencentMapKeyMessage = [
  'Production H5 build requires a well-formed non-placeholder VITE_TENCENT_MAP_KEY.',
  'Inject it through CI or an ignored .env.production.local file.'
].join(' ')

if (requireTencentMapKey && !hasUsableTencentMapKey) {
  throw new Error(missingTencentMapKeyMessage)
}

if (placeholderFiles.length > 0) {
  if (!hasUsableTencentMapKey) {
    const message = `H5 build output still contains Tencent map key placeholder. ${missingTencentMapKeyMessage}`

    if (requireTencentMapKey && !allowPlaceholder) {
      throw new Error(message)
    }

    console.warn(`[finalize-h5-build] ${message}`)
  } else {
    // 所有构建产物文本替换必须由 Node 按 UTF-8 完成，避免 PowerShell 默认编码破坏中文注释或字符串。
    for (const file of placeholderFiles) {
      const text = fs.readFileSync(file, 'utf8')
      fs.writeFileSync(file, text.split(placeholder).join(tencentMapKey), 'utf8')
    }
  }
}

const indexPath = path.join(h5Root, 'index.html')
const indexHtml = fs.readFileSync(indexPath, 'utf8')
const entryMatch = indexHtml.match(/src="\/?([^"]*assets\/index-[^"]+\.js)"/)

if (!entryMatch) {
  throw new Error(`Entry JS not found in ${indexPath}`)
}

const entryFile = path.join(h5Root, entryMatch[1])

if (!fs.existsSync(entryFile)) {
  throw new Error(`Entry JS file not found: ${entryFile}`)
}

const jsFiles = allFiles.filter((file) => /\.js$/i.test(file))

for (const file of jsFiles) {
  const check = spawnSync(process.execPath, ['--check', file], { encoding: 'utf8' })

  if (check.status !== 0) {
    process.stdout.write(check.stdout || '')
    process.stderr.write(check.stderr || '')
    throw new Error(`JavaScript syntax check failed: ${path.relative(projectRoot, file)}`)
  }
}

const badMatches = []

for (const file of textFiles) {
  const text = fs.readFileSync(file, 'utf8')
  const matchedPattern = badPatterns.find((pattern) => text.includes(pattern))

  if (matchedPattern) {
    badMatches.push({
      file: path.relative(projectRoot, file),
      pattern: matchedPattern
    })
  }
}

if (badMatches.length > 0) {
  if (allowPlaceholder) {
    console.warn('[finalize-h5-build] Test H5 build allows non-production source hosts and the Tencent map key placeholder.')
  } else {
    console.error(JSON.stringify(badMatches.slice(0, 20), null, 2))
    throw new Error('H5 build output contains forbidden test host, old domain, or placeholder.')
  }
}

const readJson = (relativePath) => JSON.parse(fs.readFileSync(path.join(h5Root, relativePath), 'utf8'))
const manifest = readJson('static/guide-data/manifest.json')
const guideContents = readJson('static/guide-data/guide-contents.json')
const exhibits = readJson('static/guide-data/exhibits.json')
const guideStops = readJson('static/guide-data/guide-stops.json')

const requiredFiles = [
  'static/guide/museum-brand-icons.webp',
  'static/icons/poi/shortcut-icons.svg',
  'static/icons/marker-entrance.svg',
  'static/Fonts/HarmonyOS_SansSC_Regular.ttf'
]
const missingFiles = requiredFiles.filter((file) => !fs.existsSync(path.join(h5Root, file)))

if (missingFiles.length > 0) {
  throw new Error(`Required H5 static assets are missing: ${missingFiles.join(', ')}`)
}

console.log(`H5_ENTRY=${entryMatch[1]}`)
console.log(`H5_ENTRY_SIZE=${fs.statSync(entryFile).size}`)
console.log(`H5_JS_SYNTAX_CHECKED=${jsFiles.length}`)
console.log(`H5_TENCENT_PLACEHOLDER_REPLACED_FILES=${hasUsableTencentMapKey ? placeholderFiles.length : 0}`)
console.log(`H5_BAD_STRING_FILE_COUNT=${badMatches.length}`)
console.log(`H5_MANIFEST_SOURCE_HOST=${manifest.source?.sourceHost || ''}`)
console.log(`H5_GUIDE_CONTENTS_ROWS=${guideContents.rows?.length || 0}`)
console.log(`H5_EXHIBITS_ROWS=${exhibits.rows?.length || 0}`)
console.log(`H5_GUIDE_STOPS_ROWS=${guideStops.rows?.length || 0}`)