/**
 * 埋点服务
 * 提供分享和下载打印事件的上报功能
 */

// 生成唯一 UUID
function generateUUID(): string {
    const timestamp = Date.now();
    const random = Math.floor(Math.random() * 1000000);
    return `${timestamp}-${random}`;
}

// 格式化时间为 yyyy-MM-dd HH:mm
function formatTime(date: Date = new Date()): string {
    const year = date.getFullYear();
    const month = String(date.getMonth() + 1).padStart(2, '0');
    const day = String(date.getDate()).padStart(2, '0');
    const hours = String(date.getHours()).padStart(2, '0');
    const minutes = String(date.getMinutes()).padStart(2, '0');
    return `${year}-${month}-${day} ${hours}:${minutes}`;
}

/**
 * 获取今天的日期字符串（yyyy-MM-dd）
 */
function getTodayString(): string {
    const date = new Date();
    const year = date.getFullYear();
    const month = String(date.getMonth() + 1).padStart(2, '0');
    const day = String(date.getDate()).padStart(2, '0');
    return `${year}-${month}-${day}`;
}

/**
 * 获取事件计数（当天该事件上报的次数）
 * 使用本地存储持久化，每天重置计数
 */
function getEventCount(eventName: string): number {
    try {
        const storageKey = `tracker_count_${eventName}`;
        const dateKey = `tracker_date_${eventName}`;
        const today = getTodayString();

        // 获取上次记录的日期
        const lastDate = wx.getStorageSync(dateKey);

        let currentCount = 0;
        // 如果是今天，获取上次的计数；否则重置为0
        if (lastDate === today) {
            currentCount = wx.getStorageSync(storageKey) || 0;
        }

        // 递增计数
        const newCount = currentCount + 1;

        // 保存计数和日期
        wx.setStorageSync(storageKey, newCount);
        wx.setStorageSync(dateKey, today);

        return newCount;
    } catch (error) {
        console.error('获取事件计数失败:', error);
        return 1; // 如果存储失败，返回 1
    }
}

/**
 * 埋点追踪器
 */
class Tracker {
    private uuid: string;
    private openLog: boolean;

    constructor() {
        // 初始化时获取或生成 UUID（持久化存储）
        this.uuid = this.getOrCreateUUID();
        this.openLog = true;
    }

    /**
     * 获取或创建 UUID
     */
    private getOrCreateUUID(): string {
        const uuidKey = 'tracker_uuid';
        let storedUUID = wx.getStorageSync(uuidKey);
        if (!storedUUID) {
            storedUUID = generateUUID();
            wx.setStorageSync(uuidKey, storedUUID);
        }
        return storedUUID;
    }

    printLog(tip: string, message?: string | object): void {
        if (this.openLog) {
            if (message) {
                if (typeof message === 'object') {
                    console.log(tip, ':', JSON.stringify(message, null, 2));
                } else {
                    console.log(tip, ':', message as string);
                }
            } else {
                console.log(tip);
            }
        }
    }

    /**
     * 上报分享点击事件
     * @param pageName 页面名称
     */
    reportShare(pageName: string): void {
        try {
            const time = formatTime();
            const count = getEventCount('share_click');
            const params = {
                count,
                time,
                uuid: this.uuid,
                page_name: pageName,
            };

            this.printLog('分享事件', params);
            wx.reportEvent('share_click', params);
        } catch (error) {
            console.error('上报分享事件失败:', error);
        }
    }

    /**
     * 上报下载打印事件
     * @param pageName 页面名称
     */
    reportDownload(pageName: string): void {
        try {
            const time = formatTime();
            const count = getEventCount('download');
            const params = {
                count,
                time,
                uuid: this.uuid,
                page_name: pageName,
            };

            this.printLog('下载事件', params);
            wx.reportEvent('download', params);
        } catch (error) {
            console.error('上报下载事件失败:', error);
        }
    }
}

// 创建并导出 tracker 实例
const tracker = new Tracker();

export default tracker;