/**
 * 将 newpp 构建产物 dist/mp 合并到项目根 miniprogram/
 * 保留 miniprogram 壳：custom-tab-bar、project.config.json、sitemap.json、app.js 的 globalData/request 等需手动合并
 * 用法：node scripts/merge-kbone-to-miniprogram.js
 */
const fs = require('fs')
const path = require('path')

const root = path.resolve(__dirname, '..')
const distMp = path.join(root, 'newpp', 'dist', 'mp')
const miniprogram = path.join(root, 'miniprogram')

if (!fs.existsSync(distMp)) {
  console.error('未找到 newpp/dist/mp，请先在 newpp 目录执行: npm run build:mp')
  process.exit(1)
}
if (!fs.existsSync(miniprogram)) {
  console.error('未找到 miniprogram 目录')
  process.exit(1)
}

function copyDir(src, dest) {
  if (!fs.existsSync(dest)) fs.mkdirSync(dest, { recursive: true })
  const entries = fs.readdirSync(src, { withFileTypes: true })
  for (const e of entries) {
    const s = path.join(src, e.name)
    const d = path.join(dest, e.name)
    if (e.isDirectory()) {
      copyDir(s, d)
    } else {
      fs.copyFileSync(s, d)
    }
  }
}

// 要保留的 miniprogram 文件/目录（合并前备份，合并后覆盖回去）
const keep = ['custom-tab-bar', 'project.config.json', 'sitemap.json']
const backupDir = path.join(root, '.miniprogram-backup')
if (!fs.existsSync(backupDir)) fs.mkdirSync(backupDir, { recursive: true })

for (const name of keep) {
  const p = path.join(miniprogram, name)
  if (fs.existsSync(p)) {
    const stat = fs.statSync(p)
    const dest = path.join(backupDir, name)
    if (stat.isDirectory()) {
      if (fs.existsSync(dest)) fs.rmSync(dest, { recursive: true })
      copyDir(p, dest)
    } else {
      fs.copyFileSync(p, dest)
    }
  }
}

// 用 dist/mp 内容覆盖 miniprogram（除保留项）
const distEntries = fs.readdirSync(distMp, { withFileTypes: true })
for (const e of distEntries) {
  const s = path.join(distMp, e.name)
  const d = path.join(miniprogram, e.name)
  if (e.isDirectory()) {
    if (keep.includes(e.name)) continue
    if (fs.existsSync(d)) fs.rmSync(d, { recursive: true })
    copyDir(s, d)
  } else {
    if (keep.includes(e.name)) continue
    fs.copyFileSync(s, d)
  }
}

// 把保留项还原
for (const name of keep) {
  const backup = path.join(backupDir, name)
  const dest = path.join(miniprogram, name)
  if (fs.existsSync(backup)) {
    const stat = fs.statSync(backup)
    if (stat.isDirectory()) {
      if (fs.existsSync(dest)) fs.rmSync(dest, { recursive: true })
      copyDir(backup, dest)
    } else {
      fs.copyFileSync(backup, dest)
    }
  }
}

console.log('已合并 newpp/dist/mp -> miniprogram/，并保留 custom-tab-bar、project.config.json、sitemap.json')
console.log('请手动合并 app.js 的 globalData、request、loadFeatureConfig 等逻辑到 kbone 生成的 app.js')