#!/usr/bin/env node
/**
 * pages.json 中 tabBar 使用占位符 __STATIC_ASSETS_BASE_URL__，构建前替换为真实根地址，构建后还原。
 * - materialize：写入备份并替换（默认按「开发/测试」解析基址；见 resolveBase）
 * - materialize:prod：按「生产」解析基址（与发行 `build` 子命令一致）
 * - restore：从备份还原并删除备份
 * - build：materialize(prod) → uni build → restore（finally）
 */
import fs from 'node:fs'
import path from 'node:path'
import { fileURLToPath } from 'node:url'
import { execSync } from 'node:child_process'

const __dirname = path.dirname(fileURLToPath(import.meta.url))
const root = path.resolve(__dirname, '..')
const pagesPath = path.join(root, 'src/pages.json')
const bakPath = path.join(root, 'src/.pages-json.tabbar-placeholder.bak')

function loadEnvFile(rel) {
  const p = path.join(root, rel)
  if (!fs.existsSync(p)) return {}
  const out = {}
  for (const line of fs.readFileSync(p, 'utf8').split('\n')) {
    const t = line.trim()
    if (!t || t.startsWith('#')) continue
    const eq = t.indexOf('=')
    if (eq === -1) continue
    const k = t.slice(0, eq).trim()
    let v = t.slice(eq + 1).trim()
    if ((v.startsWith('"') && v.endsWith('"')) || (v.startsWith("'") && v.endsWith("'"))) {
      v = v.slice(1, -1)
    }
    out[k] = v
  }
  return out
}

function readConstantsFromTs() {
  const defPath = path.join(root, 'src/config/static-assets-defaults.ts')
  const raw = fs.readFileSync(defPath, 'utf8')
  const pick = (name) => {
    const m = raw.match(new RegExp(`export const ${name}\\s*=\\s*'([^']*)'`))
    return (m?.[1] ?? '').trim()
  }
  return {
    test: pick('STATIC_ASSETS_BASE_URL_TEST'),
    production: pick('STATIC_ASSETS_BASE_URL_PRODUCTION')
  }
}

/**
 * @param {'development'|'production'} mode
 */
function resolveBase(mode) {
  const explicit = process.env.VITE_STATIC_ASSETS_BASE_URL?.trim()
  if (explicit) {
    let b = explicit
    if (!b.endsWith('/')) b += '/'
    return b
  }
  const fileName = mode === 'production' ? '.env.production' : '.env.development'
  const fromFile = loadEnvFile(fileName).VITE_STATIC_ASSETS_BASE_URL?.trim()
  if (fromFile) {
    let b = fromFile
    if (!b.endsWith('/')) b += '/'
    return b
  }
  const { test, production } = readConstantsFromTs()
  const fallback = mode === 'production' ? production : test
  let b = fallback || test || 'https://www.chengyantek.cn/sqxp-static/'
  if (!b.endsWith('/')) b += '/'
  return b
}

function materialize(mode = 'development') {
  const raw = fs.readFileSync(pagesPath, 'utf8')
  if (!raw.includes('__STATIC_ASSETS_BASE_URL__')) return
  fs.writeFileSync(bakPath, raw, 'utf8')
  const base = resolveBase(mode)
  fs.writeFileSync(pagesPath, raw.replace(/__STATIC_ASSETS_BASE_URL__/g, base))
}

function restore() {
  if (!fs.existsSync(bakPath)) return
  fs.copyFileSync(bakPath, pagesPath)
  fs.unlinkSync(bakPath)
}

function main() {
  const cmd = process.argv[2] || 'build'
  if (cmd === 'materialize') {
    materialize('development')
    process.exit(0)
  }
  if (cmd === 'materialize:prod') {
    materialize('production')
    process.exit(0)
  }
  if (cmd === 'restore') {
    restore()
    process.exit(0)
  }
  if (cmd === 'build') {
    materialize('production')
    let code = 0
    try {
      execSync('npx uni build -p mp-weixin', { stdio: 'inherit', cwd: root, env: process.env })
    } catch (e) {
      code = typeof e?.status === 'number' ? e.status : 1
    } finally {
      restore()
    }
    process.exit(code)
  }
  console.error(
    'Usage: pages-tabbar-migrate.mjs [materialize|materialize:prod|restore|build]'
  )
  process.exit(1)
}

main()