// electron/utils/readConfig.js

const path = require('path');
const fs = require('fs');
const Log = require('ee-core/log');
const { spawn } = require('child_process');
const { EventEmitter } = require('events');
const { liveShow, liveHide, setParams, capture, getParams,CMD,captureLive,closeOtherWindow,minimizeSmartShooter } = require('../api/camera');

const { dialog } = require('electron'); // 引入 electron 的 dialog 模块
const CoreWindow = require("ee-core/electron/window");


const { readConfigFile, updateConfigFile } = require('../utils/config');
const defaultConfig = require('./config.default');

// 进程状态管理
let cameraProcess = null;        // 子进程引用
let isProcessRunning = false;    // 进程运行状态
const processEmitter = new EventEmitter(); // 进程事件发射器

// Smart Shooter 5 / 6 与 digiCamControl 并存。
// 5 和 6 共用同一套 External API（54543 事件 / 54544 请求），不能同时开，按 controlType 只启动其中一个。
const CONTROLLERS = {
  digiCamControl: {
    exe: "CameraControl.exe",
    pathKey: "digiCamControlPath",
    label: "digiCamControl",
  },
  SmartShooter: {
    exe: "SmartShooter5.exe",
    pathKey: "SmartShooterPath",
    label: "Smart Shooter 5",
  },
  SmartShooter6: {
    exe: "SmartShooter6.exe",
    pathKey: "SmartShooter6Path",
    label: "Smart Shooter 6",
  },
}

// 历史配置 controlType 仍是 SmartShooter，保持原行为
function normalizeControlType(type) {
  return CONTROLLERS[type] ? type : "SmartShooter"
}

function isSmartShooterType(type) {
  return type === "SmartShooter" || type === "SmartShooter6"
}

function sameDir(a, b) {
  if (!a || !b) return false
  const norm = (p) => path.normalize(String(p)).replace(/[\\/]+$/, "").toLowerCase()
  return norm(a) === norm(b)
}

// 只在仍使用出厂的 Smart Shooter 6 目录时回退，手动改过安装目录的保持原选择
function isDefaultSmartShooter6Dir(dir) {
  return sameDir(dir, defaultConfig.SmartShooter6Path) || sameDir(dir, defaultConfig.controlPath)
}

function findSmartShooter5Dir(config) {
  const candidates = [config.SmartShooterPath, defaultConfig.SmartShooterPath]
  const seen = new Set()
  for (const dir of candidates) {
    if (!dir) continue
    const key = path.normalize(String(dir)).replace(/[\\/]+$/, "").toLowerCase()
    if (seen.has(key)) continue
    seen.add(key)
    if (fs.existsSync(path.join(dir, CONTROLLERS.SmartShooter.exe))) return dir
  }
  return ""
}

function saveControllerChoice(type, dir) {
  const spec = CONTROLLERS[type]
  if (!spec || !dir) return
  updateConfigFile({
    controlType: type,
    controlPath: dir,
    [spec.pathKey]: dir,
  })
}

function controllerChoiceMatches(config, type, dir) {
  const spec = CONTROLLERS[type]
  if (!spec) return false
  return config.controlType === type
    && sameDir(config.controlPath, dir)
    && sameDir(config[spec.pathKey], dir)
}

function uniqueDirs(dirs) {
  const result = []
  for (const dir of dirs) {
    if (!dir) continue
    if (result.some((item) => sameDir(item, dir))) continue
    result.push(dir)
  }
  return result
}

function rememberController(config, detected, dir) {
  if (!controllerChoiceMatches(config, detected, dir)) {
    Log.info(`按安装目录识别为 ${CONTROLLERS[detected].label}: ${dir}`)
    saveControllerChoice(detected, dir)
  }
  return {
    type: detected,
    ...CONTROLLERS[detected],
    dir,
  }
}

function getController() {
  const config = readConfigFile() || {}
  const type = normalizeControlType(config.controlType)
  const spec = CONTROLLERS[type]
  const dir = config.controlPath || config[spec.pathKey] || ""

  // 上次选中的目录里有 exe 时，以那个 exe 为准。
  // 避免 controlPath 已是 Smart Shooter 6，controlType 仍是 digiCamControl。
  const selected = detectController(config.controlPath)
  if (selected) return rememberController(config, selected, config.controlPath)

  // controlPath 无效时，再找该类型自己的目录和出厂目录，避免坏路径挡住已经装好的程序。
  const fallbackDirs = uniqueDirs([
    config[spec.pathKey],
    defaultConfig[spec.pathKey],
    type === "SmartShooter6" ? defaultConfig.controlPath : "",
  ])
  for (const candidate of fallbackDirs) {
    if (detectController(candidate) === type) return rememberController(config, type, candidate)
  }

  // 默认 Smart Shooter 6 目录下没有程序时，再找 Smart Shooter 5。只影响本次启动，不回写配置。
  if (type === "SmartShooter6" && isDefaultSmartShooter6Dir(dir) && !fs.existsSync(path.join(dir, spec.exe))) {
    const ss5Dir = findSmartShooter5Dir(config)
    if (ss5Dir) {
      Log.info(`默认目录未找到 SmartShooter6.exe，改用 Smart Shooter 5: ${ss5Dir}`)
      return {
        type: "SmartShooter",
        ...CONTROLLERS.SmartShooter,
        dir: ss5Dir,
      }
    }
  }

  return {
    type,
    ...spec,
    dir,
  }
}

function getExePath () {
  const controller = getController()
  const exePath = controller.dir ? path.join(controller.dir, controller.exe) : ""

  console.log('ex============ePath');
  console.log(exePath);
  return exePath
}

// 用户手动选安装目录时，按目录里实际存在的 exe 识别，5 和 6 互不覆盖
function detectController(dir) {
  if (!dir) return ""
  if (fs.existsSync(path.join(dir, CONTROLLERS.SmartShooter6.exe))) return "SmartShooter6"
  if (fs.existsSync(path.join(dir, CONTROLLERS.SmartShooter.exe))) return "SmartShooter"
  if (fs.existsSync(path.join(dir, CONTROLLERS.digiCamControl.exe))) return "digiCamControl"
  return ""
}




let ensureControllerPromise = null

async function checkCameraControlCmdExists() {
  if (!ensureControllerPromise) {
    ensureControllerPromise = ensureCameraController().finally(() => {
      ensureControllerPromise = null
    })
  }
  return ensureControllerPromise
}

async function ensureCameraController() {
  try {

    // 拼接 CameraControlCmd.exe 的完整路径

    let exePath = getExePath()
    // 检查文件是否存在
    const exists = await fs.promises.access(exePath, fs.constants.F_OK)
        .then(() => true)
        .catch(() => false);

    if (!exists) {
      // 弹出文件夹选择对话框
      const dialogOptions = {
        title: '选择 相机控制安装软件 文件夹',
        properties: ['openDirectory']
      }
      const mainWindow = CoreWindow.getMainWindow()
      const { canceled, filePaths } = mainWindow && !mainWindow.isDestroyed()
        ? await dialog.showOpenDialog(mainWindow, dialogOptions)
        : await dialog.showOpenDialog(dialogOptions);

      if (!canceled && filePaths.length > 0) {
        const selectedPath = filePaths[0];

        const detected = detectController(selectedPath);
        if (!detected) {
          console.error('所选目录不是已知的相机控制软件');
          return {
            status:-1,
            msg:"所选目录中未找到 SmartShooter6.exe、SmartShooter5.exe 或 CameraControl.exe",
          }
        }
        saveControllerChoice(detected, selectedPath)
      } else {
        console.error('用户未选择文件夹');
        return {
          status:-1,
          msg:"无法找到 SmartShooter6.exe、SmartShooter5.exe 或 CameraControl.exe",
        }
      }
    }
    const res = await openCameraControlCmd();
    
    // Smart Shooter 5 / 6 启动后最小化窗口；digiCamControl 走自己的最小化命令
    if(isSmartShooterType(getController().type)){
      // 等待软件启动完成
      setTimeout(async () => {
        try {
          await minimizeSmartShooter();
        } catch (error) {
          console.log('最小化SmartShooter失败:', error);
        }
      }, 3000); // 等待3秒让软件完全启动
    }
    
    return res;
  } catch (error) {
    Log.error('检查 第三方相机控制器 是否存在时出错:', error);
    throw error;
  }
}


function openCameraControlCmd() {
  return new Promise((resolve, reject) => {
    const exePath = getExePath()
    fs.promises.access(exePath, fs.constants.F_OK).then(() => {
      let settled = false
      const finish = (fn, value) => {
        if (settled) return
        settled = true
        fn(value)
      }

      let child
      try {
        child = spawn(exePath, [], {
          cwd: path.dirname(exePath),
          stdio: 'ignore',
        })
      } catch (error) {
        Log.error('无法启动第三方相机控制器:', error)
        finish(reject, error)
        return
      }

      cameraProcess = child
      isProcessRunning = true
      console.log('[CAMERA-DEBUG] spawn PID:', child.pid, 'cwd:', path.dirname(exePath), '时间:', new Date().toISOString());

      child.on('close', (code) => {
        console.log('[CAMERA-DEBUG] close 事件触发! PID:', cameraProcess?.pid, '退出码:', code, '时间:', new Date().toISOString());
        isProcessRunning = false;
        cameraProcess = null;
        Log.info(`相机控制软件已关闭，退出码: ${code}`);
        processEmitter.emit('camera-process-closed');
      });

      child.on('error', (err) => {
        console.log('[CAMERA-DEBUG] error 事件触发:', err.message);
        isProcessRunning = false;
        cameraProcess = null;
        Log.error('相机控制软件进程错误:', err);
        finish(reject, err)
      });

      // 图形界面程序通常没有 stdout，进程拉起即视为启动成功
      child.once('spawn', () => finish(resolve, true))
      if (child.pid) finish(resolve, true)
    }).catch((error) => {
      Log.error('无法找到或运行 第三方相机控制器:', error);
      reject(error)
    })
  })
}

async function closeCameraControlTips() {
  try {
    await  closeOtherWindow()

  }catch (e) {
    console.log(e)
  }


}

module.exports = {
  checkCameraControlCmdExists,
  closeCameraControlTips,
  minimizeSmartShooter,
  CONTROLLERS,
  isSmartShooterType,
  getController,
  // 进程状态管理
  isProcessRunning: () => isProcessRunning,
  onProcessClosed: (callback) => processEmitter.on('camera-process-closed', callback),
  removeProcessClosedListener: (callback) => processEmitter.removeListener('camera-process-closed', callback),
};