#!/usr/bin/env node
const { execSync, spawnSync } = require('child_process')
const path = require('path')
const fs = require('fs')

const configPath = process.env.STATIC_ROOT
  ? path.join(path.dirname(process.env.STATIC_ROOT), 'config.js')
  : path.join(__dirname, '..', '..', 'config.js')
const projectRoot = path.dirname(path.resolve(configPath))
const config = fs.existsSync(configPath) ? require(configPath) : {}

/** 从 config 解析并返回 adb 可执行文件路径 */
function getAdbPath() {
  const p = config.adbPath?.path
  if (p) return path.isAbsolute(p) ? p : path.resolve(projectRoot, p)
  return path.join(projectRoot, 'lib', 'scrcpy-adb', process.platform === 'win32' ? 'adb.exe' : 'adb')
}

/** 根据 deviceId 返回 adb -s 参数前缀，无设备时返回空串 */
function getDeviceFlag(deviceId) {
  return deviceId && deviceId.includes(':') ? `-s ${deviceId} ` : ''
}

/** 执行 adb shell 命令 */
function runShell(adbPath, deviceFlag, shellArgs, timeout = 1000) {
  const quoted = adbPath.includes(' ') ? `"${adbPath}"` : adbPath
  execSync(`${quoted} ${deviceFlag}shell ${shellArgs}`, { encoding: 'utf-8', timeout })
}

/** 执行 adb shell 并返回标准输出 */
function runShellWithOutput(adbPath, deviceFlag, shellArgs, timeout = 1000) {
  const quoted = adbPath.includes(' ') ? `"${adbPath}"` : adbPath
  return execSync(`${quoted} ${deviceFlag}shell ${shellArgs}`, { encoding: 'utf-8', timeout })
}

/** 处理 tap：点击坐标（超时放宽以便 WiFi 连接时能完成） */
function handleTap(adbPath, argv) {
  const coordX = argv[3]
  const coordY = argv[4]
  const deviceId = argv[5] || ''
  if (!coordX || !coordY) process.exit(1)
  const flag = getDeviceFlag(deviceId)
  runShell(adbPath, flag, `input tap ${coordX} ${coordY}`, 8000)
}

/** 根据方向与距离计算滑动的起止坐标（基于屏幕中心），返回 [startX, startY, endX, endY] */
function getSwipeCoordsByDirection(direction, distance, centerX, centerY) {
  const half = Math.floor(distance / 2)
  switch (direction) {
    case 'up-down':
      return [centerX, centerY - half, centerX, centerY + half]
    case 'down-up':
      return [centerX, centerY + half, centerX, centerY - half]
    case 'left-right':
      return [centerX - half, centerY, centerX + half, centerY]
    case 'right-left':
      return [centerX + half, centerY, centerX - half, centerY]
    default:
      process.exit(1)
  }
}

/** 处理 swipe：按方向与距离从屏幕中心滑动 */
function handleSwipe(adbPath, argv) {
  const direction = argv[3]
  const distance = parseInt(argv[4], 10)
  const duration = parseInt(argv[5], 10)
  const deviceId = argv[6] || ''
  if (!direction || !distance || !duration) process.exit(1)
  const flag = getDeviceFlag(deviceId)
  const sizeOut = runShellWithOutput(adbPath, flag, 'wm size', 1000)
  const sizeMatch = sizeOut.match(/(\d+)x(\d+)/)
  const centerX = Math.floor(parseInt(sizeMatch[1], 10) / 2)
  const centerY = Math.floor(parseInt(sizeMatch[2], 10) / 2)
  const [startX, startY, endX, endY] = getSwipeCoordsByDirection(direction, distance, centerX, centerY)
  runShell(adbPath, flag, `input swipe ${startX} ${startY} ${endX} ${endY} ${duration}`, 2000)
}

/** 处理 swipe-coords：按坐标滑动 */
function handleSwipeCoords(adbPath, argv) {
  const x1 = argv[3]
  const y1 = argv[4]
  const x2 = argv[5]
  const y2 = argv[6]
  const duration = argv[7] || 300
  const deviceId = argv[8] || ''
  if (!x1 || !y1 || !x2 || !y2) process.exit(1)
  const flag = getDeviceFlag(deviceId)
  runShell(adbPath, flag, `input swipe ${x1} ${y1} ${x2} ${y2} ${duration}`, 2000)
}

/** 处理 keyevent：按键 */
function handleKeyevent(adbPath, argv) {
  const keyCode = argv[3]
  const deviceId = argv[4] || ''
  if (!keyCode) process.exit(1)
  const flag = getDeviceFlag(deviceId)
  runShell(adbPath, flag, `input keyevent ${keyCode}`, 1000)
}

/** 简单 input text（供 type:input 等调用；adb method:input 的完整逻辑在 ef-compiler/actions/adb/input.js） */
function handleText(adbPath, argv) {
  const text = argv[3]
  const deviceId = argv[4] || ''
  if (text === undefined) process.exit(1)
  const str = String(text)
  const shellArgs = deviceId && deviceId.includes(':') ? ['-s', deviceId, 'shell', 'input', 'text', str] : ['shell', 'input', 'text', str]
  const r = spawnSync(adbPath, shellArgs, { encoding: 'utf-8', timeout: 5000 })
  if (r.status !== 0) {
    const err = new Error(r.stderr || r.stdout || 'input text failed')
    err.status = r.status
    throw err
  }
}

const action = process.argv[2]
if (!action) process.exit(1)

const adbPath = getAdbPath()

switch (action) {
  case 'tap':
    handleTap(adbPath, process.argv)
    break
  case 'swipe':
    handleSwipe(adbPath, process.argv)
    break
  case 'swipe-coords':
    handleSwipeCoords(adbPath, process.argv)
    break
  case 'keyevent':
    handleKeyevent(adbPath, process.argv)
    break
  case 'text':
    handleText(adbPath, process.argv)
    break
  default:
    process.exit(1)
}
process.exit(0)