import { spawn } from 'child_process'
import path from 'path'
import fs from 'fs'
import fsp from 'fs/promises'
import { fileURLToPath } from 'url'
import { app } from 'electron'

// ESM 下没有 __dirname，使用 import.meta.url 计算当前目录
const __filename = fileURLToPath(import.meta.url)
const __dirname = path.dirname(__filename)

const isWin = process.platform === 'win32'
const adbBinary = isWin ? 'adb.exe' : 'adb'

// 解析 adb 可执行文件路径（开发/打包均可用）
function resolveAdbPath() {
  const resources = process.resourcesPath || ''
  const candidates = [
    // 开发：项目根目录 resources/adbSDK/adb(.exe)（与 electron-builder extraResources 对应）
    path.join(process.cwd(), 'resources', 'adbSDK', adbBinary),
    // 开发：与本文件同级的 ../adbSDK/adb(.exe)
    path.join(__dirname, '..', 'adbSDK', adbBinary),
    // 开发：构建输出 out/adbSDK/adb(.exe)（如有）
    path.join(process.cwd(), 'out', 'adbSDK', adbBinary),
    // 生产：extraResources 复制到 resources/adbSDK
    path.join(resources, 'adbSDK', adbBinary),
    // 生产：若使用 asarUnpack，位于 app.asar.unpacked
    path.join(resources, 'app.asar.unpacked', 'adbSDK', adbBinary)
  ]

  for (const p of candidates) {
    try {
      if (fs.existsSync(p)) return p
    } catch {}
  }
  throw new Error(
    `adb executable not found. Tried:\n${candidates.join('\n')}\n` +
      'Please ensure adbSDK exists in development (resources/adbSDK) and is listed in extraResources for production.'
  )
}

const adbPath = resolveAdbPath()
const adbDir = path.dirname(adbPath)

function getAdbSerial(ip) {
  if (!ip) throw new Error('ip required')
  return ip.includes(':') ? ip : `${ip}:5555`
}

/**
 * 运行 adb 命令的通用封装
 */
function runAdb(args, options = {}) {
  return new Promise((resolve, reject) => {
    // 先行校验，给出更明确的错误
    if (!fs.existsSync(adbPath)) {
      return reject(new Error(`adb not found at ${adbPath}`))
    }
    const child = spawn(adbPath, args, { cwd: adbDir, windowsHide: true, ...options })
    let stdout = ''
    let stderr = ''

    child.stdout?.on('data', (d) => (stdout += d.toString()))
    child.stderr?.on('data', (d) => (stderr += d.toString()))
    child.on('error', (err) => reject(err))
    child.on('close', (code) => {
      if (code === 0) return resolve({ stdout: stdout.trim(), stderr: stderr.trim() })
      const err = new Error(`adb exited with ${code}: ${stderr || stdout}`)
      err.code = code
      err.stdout = stdout
      err.stderr = stderr
      reject(err)
    })
  })
}

// 下面其余 API 保持不变（仅把 fs/promises 改为 fsp 引用）
async function connect(ip) {
  if (!ip) throw new Error('ip required')
  return runAdb(['connect', getAdbSerial(ip)])
}

async function disconnect(ip) {
  if (ip) return runAdb(['disconnect', getAdbSerial(ip)])
  return runAdb(['disconnect'])
}

async function pull(remotePath, destFilename, ip) {
  const dest = path.join(adbDir, destFilename || path.basename(remotePath))
  await fsp.mkdir(adbDir, { recursive: true })
  const serialArgs = ip ? ['-s', getAdbSerial(ip)] : []
  await runAdb([...serialArgs, 'pull', remotePath, dest])
  return dest
}

async function push(localPath, remotePath, ip) {
  const serialArgs = ip ? ['-s', getAdbSerial(ip)] : []
  return runAdb([...serialArgs, 'push', localPath, remotePath])
}

async function readLocalOLE() {
  const file = path.join(adbDir, 'OLE.ini')
  const text = await fsp.readFile(file, 'utf8')
  const lines = text.split(/\r?\n/).filter(Boolean)
  return lines[0] ? lines[0] : null
}

async function writeFirstOLE(line1) {
  const file = path.join(adbDir, 'OLE.ini')
  let second = '1.000000'
  try {
    const text = await fsp.readFile(file, 'utf8')
    const lines = text.split(/\r?\n/).filter(Boolean)
    if (lines.length >= 2) second = lines[1]
  } catch {}
  const content = `${line1}\n${second}\n`
  await fsp.writeFile(file, content, 'utf8')
  return file
}

async function getParametersFromDevice(ip) {
  if (ip) await connect(ip)
  await pull('/data/OLE.ini', 'OLE.ini', ip)
  return readLocalOLE()
}

async function setFirstParameter({ param, ip, toSystem = false }) {
  if (param == null) throw new Error('param required')
  const local = await writeFirstOLE(param)
  if (ip) await connect(ip)
  await push(local, '/data/', ip)
  if (toSystem) {
    await push(local, '/system/etc/', ip)
  }
  return { local }
}

export { adbPath, runAdb, connect, pull, push, readLocalOLE, writeFirstOLE, getParametersFromDevice, setFirstParameter, disconnect, getAdbSerial }