/**
 * 运行时 API：设备操作（adb）、日志、桩函数
 * config 由主脚本传入：{ projectRoot, adbInteractPath }
 */
const path = require('path')
const fs = require('fs')
const { spawnSync } = require('child_process')

const UTF8_BOM = Buffer.from('\uFEFF', 'utf8')
function appendLog(folderPath, message) {
  if (!folderPath || typeof folderPath !== 'string') return Promise.resolve()
  const logDir = path.resolve(folderPath)
  const logFile = path.join(logDir, 'log.txt')
  try {
    fs.mkdirSync(logDir, { recursive: true })
    const line = (typeof message === 'string' ? message : String(message)) + '\n'
    const exists = fs.existsSync(logFile)
    if (!exists || (exists && fs.statSync(logFile).size === 0)) fs.appendFileSync(logFile, UTF8_BOM)
    fs.appendFileSync(logFile, Buffer.from(line, 'utf8'))
  } catch (e) {}
  return Promise.resolve()
}

const _stub = (name) => ({ success: false, error: `${name} must be implemented in main process` })

function createElectronAPI(overrides = {}, config = {}) {
  const { projectRoot, adbInteractPath, nodeExePath } = config
  const nodeExe = (nodeExePath && nodeExePath !== 'node') ? nodeExePath : 'node'
  const runAdb = (action, args = [], deviceId = '') => {
    if (!adbInteractPath) return { success: false, error: 'adbInteractPath not configured' }
    const env = projectRoot ? { ...process.env, STATIC_ROOT: path.join(projectRoot, 'static') } : process.env
    const r = spawnSync(nodeExe, [adbInteractPath, action, ...args, deviceId], { encoding: 'utf-8', timeout: 10000, env })
    const errStr = (r.stderr && String(r.stderr).trim()) || (r.error && r.error.message) || `exit code ${r.status}`
    return { success: r.status === 0, error: r.status === 0 ? undefined : errStr }
  }
  const sendTap = (device, x, y) => runAdb('tap', [String(x), String(y)], device)
  const sendSwipe = (device, x1, y1, x2, y2, duration) =>
    runAdb('swipe-coords', [String(x1), String(y1), String(x2), String(y2), String(duration || 300)], device)
  const sendKeyEvent = (device, keyCode) => runAdb('keyevent', [String(keyCode)], device)
  const sendText = (device, text) => runAdb('text', [String(text)], device)
  let sendSystemKeyImpl = () => _stub('sendSystemKey')
  const adbSysBtnPath = adbInteractPath ? path.join(path.dirname(adbInteractPath), 'adb-sys-btn.js') : null
  if (adbSysBtnPath && fs.existsSync(adbSysBtnPath)) {
    try {
      const { sendSystemButton } = require(adbSysBtnPath)
      sendSystemKeyImpl = (device, keyCode) => sendSystemButton(String(keyCode), device)
    } catch (e) {}
  }
  return {
    sendTap,
    sendSwipe,
    sendKeyEvent,
    sendText,
    sendSystemKey: sendSystemKeyImpl,
    matchImageAndGetCoordinate: null,
    findTextAndGetCoordinate: () => _stub('findTextAndGetCoordinate'),
    appendLog,
    readTextFile: null,
    writeTextFile: null,
    saveChatHistory: () => _stub('saveChatHistory'),
    readChatHistory: () => _stub('readChatHistory'),
    readAllChatHistory: () => _stub('readAllChatHistory'),
    saveChatHistorySummary: () => _stub('saveChatHistorySummary'),
    getChatHistorySummary: () => _stub('getChatHistorySummary'),
    saveChatHistoryTxt: () => _stub('saveChatHistoryTxt'),
    extractChatHistory: () => _stub('extractChatHistory'),
    readLastMessage: () => _stub('readLastMessage'),
    ocrLastMessage: () => _stub('ocrLastMessage'),
    getCachedScreenshot: () => _stub('getCachedScreenshot'),
    captureScreenshot: () => _stub('captureScreenshot'),
    sendScroll: () => _stub('sendScroll'),
    matchImageRegionLocation: () => _stub('matchImageRegionLocation'),
    ...overrides,
  }
}

module.exports = {
  appendLog,
  createElectronAPI,
}