// 设备信息和兼容性工具
export const deviceUtils = {
  // 获取系统信息
  getSystemInfo() {
    try {
      return uni.getSystemInfoSync()
    } catch (e) {
      console.error('获取系统信息失败:', e)
      return {}
    }
  },

  // 判断是否为低端设备
  isLowEndDevice() {
    const systemInfo = this.getSystemInfo()

    // 判断条件：内存小于4GB 或 CPU性能较差
    if (systemInfo.memSize && systemInfo.memSize < 4) {
      return true
    }

    // Android 设备版本较低
    if (systemInfo.platform === 'android' && systemInfo.system) {
      const version = parseFloat(systemInfo.system.replace('Android ', ''))
      if (version < 7.0) {
        return true
      }
    }

    // iOS 设备版本较低
    if (systemInfo.platform === 'ios' && systemInfo.system) {
      const version = parseFloat(systemInfo.system.replace('iOS ', ''))
      if (version < 12.0) {
        return true
      }
    }

    return false
  },

  // 获取屏幕适配信息
  getScreenInfo() {
    const systemInfo = this.getSystemInfo()

    return {
      screenWidth: systemInfo.screenWidth,
      screenHeight: systemInfo.screenHeight,
      statusBarHeight: systemInfo.statusBarHeight,
      safeAreaInsets: systemInfo.safeAreaInsets,
      // 判断是否为刘海屏
      hasNotch:
                systemInfo.safeAreaInsets &&
                systemInfo.safeAreaInsets.top > systemInfo.statusBarHeight,
      // 判断是否为横屏
      isLandscape: systemInfo.screenWidth > systemInfo.screenHeight,
    }
  },

  // 获取设备类型
  getDeviceType() {
    const systemInfo = this.getSystemInfo()

    if (systemInfo.uniPlatform === 'mp-weixin') {
      return 'wechat-miniprogram'
    } else if (systemInfo.uniPlatform === 'h5') {
      return 'h5'
    } else if (systemInfo.uniPlatform === 'app-plus') {
      return systemInfo.platform === 'ios' ? 'ios-app' : 'android-app'
    }

    return 'unknown'
  },
}

// 网络状态管理
export const networkUtils = {
  // 获取网络状态
  getNetworkType() {
    return new Promise((resolve) => {
      uni.getNetworkType({
        success: (res) => {
          resolve(res.networkType)
        },
        fail: () => {
          resolve('unknown')
        },
      })
    })
  },

  // 监听网络状态变化
  onNetworkStatusChange(callback) {
    uni.onNetworkStatusChange(callback)
  },

  // 判断是否为弱网环境
  async isWeakNetwork() {
    const networkType = await this.getNetworkType()
    return ['2g', '3g', 'slow'].includes(networkType)
  },

  // 根据网络状况调整请求策略
  async getRequestConfig() {
    const isWeak = await this.isWeakNetwork()

    if (isWeak) {
      return {
        timeout: 30000, // 增加超时时间
        retryTimes: 3, // 增加重试次数
        useCache: true, // 优先使用缓存
      }
    }

    return {
      timeout: 10000,
      retryTimes: 1,
      useCache: false,
    }
  },
}

// 性能优化工具
export const performanceUtils = {
  // 图片懒加载配置
  getImageLoadConfig() {
    const isLowEnd = deviceUtils.isLowEndDevice()

    return {
      // 低端设备减少同时加载的图片数量
      concurrent: isLowEnd ? 2 : 5,
      // 低端设备使用较小的图片
      quality: isLowEnd ? 'low' : 'high',
      // 预加载距离
      threshold: isLowEnd ? 100 : 300,
    }
  },

  // 动画性能配置
  getAnimationConfig() {
    const isLowEnd = deviceUtils.isLowEndDevice()

    return {
      // 低端设备禁用复杂动画
      enableComplexAnimation: !isLowEnd,
      // 动画持续时间
      duration: isLowEnd ? 200 : 300,
      // 动画缓动函数
      easing: isLowEnd ? 'linear' : 'ease-out',
    }
  },

  // 列表滚动优化
  getScrollConfig() {
    const isLowEnd = deviceUtils.isLowEndDevice()

    return {
      // 虚拟滚动阈值
      virtualScrollThreshold: isLowEnd ? 50 : 100,
      // 缓冲区大小
      bufferSize: isLowEnd ? 5 : 10,
      // 是否开启上拉加载节流
      enableThrottle: isLowEnd,
    }
  },
}

// 适配工具
export const adaptUtils = {
  // 获取安全区域样式
  getSafeAreaStyle() {
    const screenInfo = deviceUtils.getScreenInfo()

    return {
      paddingTop: `${screenInfo.safeAreaInsets?.top || screenInfo.statusBarHeight || 0}px`,
      paddingBottom: `${screenInfo.safeAreaInsets?.bottom || 0}px`,
      paddingLeft: `${screenInfo.safeAreaInsets?.left || 0}px`,
      paddingRight: `${screenInfo.safeAreaInsets?.right || 0}px`,
    }
  },

  // 获取底部安全区域高度
  getBottomSafeHeight() {
    const screenInfo = deviceUtils.getScreenInfo()
    return screenInfo.safeAreaInsets?.bottom || 0
  },

  // 获取顶部安全区域高度
  getTopSafeHeight() {
    const screenInfo = deviceUtils.getScreenInfo()
    return screenInfo.safeAreaInsets?.top || screenInfo.statusBarHeight || 0
  },

  // rpx转px
  rpxToPx(rpx) {
    const systemInfo = deviceUtils.getSystemInfo()
    return (rpx * systemInfo.screenWidth) / 750
  },

  // px转rpx
  pxToRpx(px) {
    const systemInfo = deviceUtils.getSystemInfo()
    return (px * 750) / systemInfo.screenWidth
  },
}