class HTTP {
    constructor(baseUrl) {
        this.baseUrl = baseUrl;
        this.hangUp = [];
        this.intercept = false;
        this.logInAgain = null;
        this.requestTask = null;
        this._pendingRequests = new Map();

        // 默认请求配置
        this.defaultTimeout = 30000; // 30秒默认超时
        this.maxRetries = 2; // 最多重试次数

        this.updateList = (content, getList) => {
            content.copyContent = JSON.parse(JSON.stringify(content));
            content.pageSize = (content.pageNumber - 1) * (content.pageSize || 20);
            content.pageNumber = 1;
            getList()
        }

        this.formatNumber = (num, decimalPlaces = 2) => {
            if (!num && num !== 0) return '';
            let [integer, decimal] = String(num.toFixed(decimalPlaces)).split('.');
            integer = integer.replace(/\B(?=(\d{3})+(?!\d))/g, ',');
            return decimal ? `${integer}.${decimal}` : integer;
        }

        this.getSpecifiedImage = (obj, getType = false) => {
            obj.url = this.getImageUrl(obj.url)
            try {
                let type = getType ? 'compressed' : 'thumbnail';
                let imgObj = obj.subfiles.find(v => v.type == type);
                return this.getImageUrl(imgObj.url || obj.url);
            } catch (error) {
                return this.getImageUrl(obj.url);
            }
        }

        this.getImageUrl = (url) => {
            if (!url) return '';
            if (!/^https?:\/\//.test(url)) {
                url = this.baseUrl + url
            }
            return url;
        }

        this.jsessionid = uni.getStorageSync('JSESSIONID') || '';
        console.log("接口地址", this.baseUrl);
    }

    // 生成请求唯一标识（用于防重复）
    _generateRequestKey(url, data, method) {
        return `${method}:${url}:${JSON.stringify(data)}`;
    }

    // 检查是否有相同请求正在执行
    _isRequestPending(key) {
        const pending = this._pendingRequests.get(key);
        if (pending && pending.task) {
            const isValid = pending.timestamp && (Date.now() - pending.timestamp < 5000);
            if (isValid) return true;
            this._pendingRequests.delete(key);
        }
        return false;
    }

    // 记录请求
    _addPendingRequest(key, task) {
        this._pendingRequests.set(key, { task, timestamp: Date.now() });
        // 5秒后自动清理
        setTimeout(() => this._pendingRequests.delete(key), 5000);
    }

    // 移除请求记录
    _removePendingRequest(key) {
        this._pendingRequests.delete(key);
    }

    request({
        url = "",
        data = {},
        method = "POST",
        header = {
            'content-type': 'application/json',
            "accesstoken": data.accesstoken || uni.getStorageSync('userMsg')?.token || '',
            "Cookie": `JSESSIONID=${this.jsessionid}`
        },
        suffix = '/yos/rest',
        timeout = this.defaultTimeout,
        retry = this.maxRetries
    }) {
        // 分页预检：如果pageNumber大于pageTotal，直接返回空
        try {
            if (data.content && data.content.pageNumber && data.content.pageTotal) {
                if (data.content.pageNumber > data.content.pageTotal) {
                    return Promise.resolve({ code: 0 });
                }
            }
        } catch (error) { }

        // 生成请求key，检查是否重复
        const requestKey = this._generateRequestKey(url, data, method);
        if (this._isRequestPending(requestKey)) {
            console.log('检测到重复请求，已忽略:', url);
            return Promise.resolve({ code: 0, message: 'duplicate_request' });
        }

        return new Promise((resolve, reject) => {
            let fullUrl = suffix.startsWith('http') ? suffix : (suffix == '/yos/rest' ? this.baseUrl : "") + suffix + url;
            if (fullUrl.includes('/index/loginbyaccount')) {
                fullUrl = fullUrl.replace('http://61.164.207.46:8900', 'http://61.164.207.46:8300');
                fullUrl = fullUrl.replace('https://meida.cnyunl.com:888', 'https://crm.meida.com:16691');
            }
            
            // 记录当前请求
            this._addPendingRequest(requestKey, true);
            
            this._requestWithRetry(fullUrl, resolve, reject, data, method, header, retry, requestKey, timeout);
        })
    }

    // 带重试的请求
    _requestWithRetry(url, resolve, reject, data, method, header, retriesLeft, requestKey, timeout) {
        const doRequest = () => {
            // 取消之前的请求（如果存在）
            if (this.requestTask) {
                this.requestTask.abort();
            }

            this._request(url, (result) => {
                this._removePendingRequest(requestKey);
                resolve(result);
            }, (err) => {
                if (retriesLeft > 0) {
                    console.log(`请求失败，剩余重试次数: ${retriesLeft}`);
                    // 网络错误时重试
                    setTimeout(() => {
                        this._requestWithRetry(url, resolve, reject, data, method, header, retriesLeft - 1, requestKey, timeout);
                    }, 1000);
                } else {
                    this._removePendingRequest(requestKey);
                    reject(err);
                }
            }, data, method, header, null, timeout);
        };
        doRequest();
    }

    getRequest({
        url,
        method = "GET",
        header = {
            "Cookie": `JSESSIONID=${this.jsessionid}`
        },
        timeout = this.defaultTimeout
    }) {
        return new Promise((resolve, reject) => {
            this._request(url, resolve, reject, {}, method, header, null, timeout);
        })
    }

    // 取消所有请求
    cancelAllRequests() {
        if (this.requestTask) {
            this.requestTask.abort();
            this.requestTask = null;
        }
        this._pendingRequests.clear();
    }

    _request(url, resolve, reject, data, method, header, showLoading, timeout = this.defaultTimeout) {
        if (showLoading) uni.showLoading({
            title: showLoading,
            mask: true
        });

        this.requestTask = uni.request({
            url,
            data: data,
            method: method,
            header: header,
            timeout: timeout,
            success: (res) => {
                this._handleSessionCookies(res);
                try {
                    if (res.data.pageNumber) {
                        res.data.firstPage = res.data.pageNumber === 1;
                        if (data.content && data.content.copyContent) {
                            res.data.pageNumber = data.content.copyContent.pageNumber;
                            res.data.pageTotal = data.content.copyContent.pageTotal;
                            data.content.pageSize = data.content.copyContent.pageSize;
                            delete data.content.copyContent
                        }
                    }
                } catch (error) { }
                resolve(res.data);
            },
            fail: (err) => {
                reject(err);
            },
            complete: (res) => {
                this.requestTask = null;
                if (showLoading) uni.hideLoading();

                if (res.errMsg && !res.errMsg.includes('request:ok') && !res.errMsg.includes('abort')) {
                    uni.showToast({
                        title: '网络异常，请稍后再试',
                        icon: "none"
                    });
                }

                // 会话过期处理 - 使用更安全的方式
                if (res.data && ['登录凭证已过期，请重新登录!', '身份令牌无效，请重新登陆！', '登陆状态已过期，请重新登陆！'].includes(res.data.msg)) {
                    if (this.sessionExpiredNotified) return;
                    this.sessionExpiredNotified = true;

                    this.jsessionid = '';
                    uni.removeStorageSync('JSESSIONID');
                    
                    // 使用 setTimeout 避免在页面生命周期中直接操作
                    setTimeout(() => {
                        const pages = getCurrentPages();
                        const currentPage = pages.length > 0 ? pages[pages.length - 1] : null;
                        const currentRoute = currentPage ? currentPage.route : '';
                        
                        if (currentRoute !== 'pages/login/login') {
                            uni.showModal({
                                title: '提示',
                                content: '您的登录状态已过期，请重新登录。',
                                showCancel: false,
                                success: () => {
                                    this.sessionExpiredNotified = false;
                                    uni.reLaunch({
                                        url: '/pages/login/login',
                                        fail: () => uni.redirectTo({ url: '/pages/login/login' })
                                    });
                                },
                                fail: () => {
                                    this.sessionExpiredNotified = false;
                                }
                            });
                        } else {
                            this.sessionExpiredNotified = false;
                        }
                    }, 100);
                }
            }
        });
    }

    _handleSessionCookies(res) {
        try {
            const cookies = res.cookies || [];
            const headers = res.header || {};
            const setCookie = headers['Set-Cookie'] || headers['set-cookie'];
            if (setCookie) {
                const cookieArray = Array.isArray(setCookie) ? setCookie : [setCookie];
                cookies.push(...cookieArray);
            }

            for (const cookie of cookies) {
                const match = cookie.match(/JSESSIONID=([^;]+)/i);
                if (match && match[1]) {
                    const newSessionId = match[1];
                    if (newSessionId !== this.jsessionid) {
                        this.jsessionid = newSessionId;
                        uni.removeStorageSync('JSESSIONID');
                        uni.setStorageSync('JSESSIONID', newSessionId);
                    }
                    break;
                }
            }
        } catch (error) {
            console.error('处理会话Cookie时出错:', error);
        }
    }
}

export { HTTP };