// electron/utils/readConfig.js

const fs = require('fs');
const path = require('path');
const { app } = require('electron');
const defaultConfig = require('./config.default');

const configPath = path.join(app.getPath("userData"),'config.default.json');

// Smart Shooter 5 的历史默认安装目录。用户目录里的旧配置会盖掉代码默认值，
// 只有仍停在这套出厂值时才自动切到 6；手动选过别的目录则保持不动。
const LEGACY_SMARTSHOOTER5 = {
  controlType: "SmartShooter",
  controlPath: "C:\\Program Files\\Smart Shooter 5",
}

function migrateLegacySmartShooter(config) {
  if (!config || config.smartShooter6Migrated) return { config, changed: false }
  const stillFactoryDefault = config.controlType === LEGACY_SMARTSHOOTER5.controlType
    && config.controlPath === LEGACY_SMARTSHOOTER5.controlPath
  config.smartShooter6Migrated = true
  if (!stillFactoryDefault) return { config, changed: true }
  config.controlType = defaultConfig.controlType
  config.controlPath = defaultConfig.controlPath
  config.SmartShooterPath = config.SmartShooterPath || LEGACY_SMARTSHOOTER5.controlPath
  config.SmartShooter6Path = defaultConfig.SmartShooter6Path
  return { config, changed: true }
}

/**
 * 读取配置文件
 */
function readConfigFile() {

  try {
    if (fs.existsSync(configPath)) {
      const data = fs.readFileSync(configPath, 'utf8');
      const parsed = JSON.parse(data);
      const { config: merged, changed } = migrateLegacySmartShooter({
        ...defaultConfig,
        ...parsed,
      });
      if (changed) {
        fs.writeFileSync(configPath, JSON.stringify(merged, null, 2), 'utf8');
      }

      return merged;
    } else {
      console.log('配置文件不存在');
      // 创建空白JSON文件
      fs.writeFileSync(configPath, '{}', 'utf8');
      return {
        ...defaultConfig,
      };
    }
  } catch (error) {
    console.error('读取配置文件出错:', error);
    return null;
  }
}

function loadConfigFile() {
  if (!fs.existsSync(configPath)) {
    return { ...defaultConfig }
  }
  const data = fs.readFileSync(configPath, 'utf8');
  return {
    ...defaultConfig,
    ...JSON.parse(data),
  }
}

/**
 * 一次写入多项配置，避免 controlType 和安装目录被分成几次写入后互相覆盖
 */
function updateConfigFile(partial) {
  try {
    const config = {
      ...loadConfigFile(),
      ...partial,
    }
    fs.writeFileSync(configPath, JSON.stringify(config, null, 2), 'utf8');
    console.log(`成功写入配置项: ${Object.keys(partial).join(', ')}`);
  } catch (error) {
    console.error('写入配置文件出错:', error);
  }
}

/**
 * 写入配置文件
 * @param {string} key - 要写入的配置项键名
 * @param {*} value - 要写入的配置项值
 */
function writeConfigFile(key, value) {
  updateConfigFile({ [key]: value })
}

module.exports = {
  readConfigFile,
  writeConfigFile,
  updateConfigFile
};