/**
 * 响应式工具函数
 * 用于检测设备类型、屏幕尺寸和横竖屏
 */

// 获取系统信息
function getSystemInfo() {
    try {
        return uni.getSystemInfoSync()
    } catch (e) {
        console.error('获取系统信息失败:', e)
        return {
            windowWidth: 375,
            windowHeight: 667,
            screenWidth: 375,
            screenHeight: 667,
            pixelRatio: 2
        }
    }
}

/**
 * 判断是否为平板设备
 * 通常平板宽度 >= 768px (在rpx中约为 1536rpx)
 */
export function isTablet() {
    const systemInfo = getSystemInfo()
    const windowWidth = systemInfo.windowWidth || systemInfo.screenWidth || 375
    // 在H5环境下，windowWidth是px单位
    // 在UniApp中，通常以rpx为基准，750rpx = 屏幕宽度
    // 平板判断：宽度 >= 768px (约等于 1536rpx / 2 = 768px)
    return windowWidth >= 768
}

/**
 * 判断是否为手机设备
 */
export function isMobile() {
    return !isTablet()
}

/**
 * 获取设备类型
 * @returns {'mobile' | 'tablet'}
 */
export function getDeviceType() {
    return isTablet() ? 'tablet' : 'mobile'
}

/**
 * 是否横屏
 */
export function isLandscape() {
    const systemInfo = getSystemInfo()
    const width = systemInfo.windowWidth || systemInfo.screenWidth || 375
    const height = systemInfo.windowHeight || systemInfo.screenHeight || 667
    return width > height
}

/**
 * 是否竖屏
 */
export function isPortrait() {
    return !isLandscape()
}

/**
 * 获取屏幕宽度（px）
 */
export function getScreenWidth() {
    const systemInfo = getSystemInfo()
    return systemInfo.windowWidth || systemInfo.screenWidth || 375
}

/**
 * 获取屏幕高度（px）
 */
export function getScreenHeight() {
    const systemInfo = getSystemInfo()
    return systemInfo.windowHeight || systemInfo.screenHeight || 667
}

/**
 * 响应式混入
 * 可以在组件中使用
 * this.isTablet, this.isMobile, this.deviceType
 * this.isLandscape, this.isPortrait
 */
export const responsiveMixin = {
    data() {
        return {
            deviceType: 'mobile',
            screenWidth: 375,
            screenHeight: 667,
            isLandscape: false,
            isPortrait: true
        }
    },
    computed: {
        isTablet() {
            return this.deviceType === 'tablet'
        },
        isMobile() {
            return this.deviceType === 'mobile'
        }
    },
    onLoad() {
        this.updateDeviceInfo()
    },
    onShow() {
        this.updateDeviceInfo()
    },
    onResize() {
        this.updateDeviceInfo()
    },
    methods: {
        updateDeviceInfo() {
            this.deviceType = getDeviceType()
            this.screenWidth = getScreenWidth()
            this.screenHeight = getScreenHeight()
            this.isLandscape = isLandscape()
            this.isPortrait = !this.isLandscape
        }
    }
}