/**
 * 管理后台http客户端，避免冲突导出为mhttp
 */
layui.define(['jquery', 'layer', 'http', 'toast', 'madmin'], function (exports) {
    "use strict";

    var $ = layui.jquery;
    var layer = layui.layer;
    var toast = layui.toast;
    var admin = layui.madmin;

    var http = {};
    http.ajax = function (userOptions, innerData) {
        var objOptions = {};
        if (userOptions && typeof(userOptions) == 'string') {
            // 参数是字符串，直接拼接选项url.
            objOptions.url = userOptions;
            userOptions = objOptions;
        }
        userOptions = userOptions || {};

        if (userOptions) {
            if (typeof(userOptions.url) != 'undefined') {
                var originUrl = userOptions.url;
                var config = admin.getConfig();
                var baseUrl = window._CONFIG_.sysconfig.apiServerBaseUrl;
                var reg1 = /^(http:|https:)/;
                if (!reg1.test(originUrl)) {
                    userOptions.url = baseUrl.rtrim('/') + '/' + userOptions.url.ltrim('/');
                } 

                var urlConcat = '&';
                if (userOptions.url.lastIndexOf('?') == -1) {
                    // 没有找到.
                    urlConcat = '?';
                }
                
                // 追加刷新随机hash.
                userOptions.url += urlConcat +  '_fresh=' + Math.random() * 100000;
                // 相对协议.
                userOptions.url = slashesUrl(userOptions.url);
            }
        }
        if (innerData) {
            userOptions.data = JSON.stringify({
                "data" : innerData,
                "handshake": ''
            });
        }
        var originInnerData ={};
        if (userOptions.data){
            originInnerData = userOptions.data;
        }
        userOptions.data = JSON.stringify({
            "data" : originInnerData,
            "handshake": ''
        });

        var options = $.extend(true, {}, http.ajax.defaultOpts, userOptions);
        var oldBeforeSendOption = options.beforeSend;
        options.beforeSend = function (xhr) {
            if (oldBeforeSendOption) {
                oldBeforeSendOption(xhr);
            }

            xhr.setRequestHeader("Pragma", "no-cache");
            xhr.setRequestHeader("Cache-Control", "no-cache");
            xhr.setRequestHeader("Expires", "Sat, 01 Jan 2000 00:00:00 GMT");
        };

        options.success = undefined;
        options.error = undefined;

        return $.Deferred(function ($dfd) {
            $.ajax(options)
                .done(function (data, textStatus, jqXHR) {
                    if (data.hasOwnProperty('code') && data.hasOwnProperty('handshake')) {
                        // 盲写，还没对接接口测试.
                        var intCode = parseInt(data.code);
                        var redirectUrl = window.rootUrl + '/login.html';
                        if (intCode == 403) {
                            http.ajax.showErrorAndRedirectUrl(http.ajax.defaultError403, redirectUrl);
                        } else if (intCode == 401) {
                            // 仅仅是过期了，这里可以有其他逻辑补偿.
                            // 暂时跳到登陆页面
                            // refreshToken();
                            http.ajax.showErrorAndRedirectUrlByYes(http.ajax.defaultError401, redirectUrl);
                        }
                    }
                    $dfd.resolve(data);
                    userOptions.success && userOptions.success(data);
                })
                .fail(function (jqXHR) {
                    http.ajax.handleErrorResponse(jqXHR, userOptions, $dfd);
                });
        });
    }

    $.extend(http.ajax, {
        defaultOpts: {
            dataType: 'json',
            type: 'POST',
            contentType: 'application/json',
            // async:false,// 改成同步请求
            headers: {
                // 'X-Requested-With': 'XMLHttpRequest'
            }
        },

        defaultError: {
            message: '发生错误!',
            details: '未知错误.'
        },

        defaultError401: {
            message: '授权过期',
            details: '请重新登陆.'
        },

        defaultError403: {
            message: '认证失效!',
            details: '无权操作.'
        },

        defaultError404: {
            message: '资源未找到',
            details: '服务器上没找到资源.'
        },

        logError: function (error) {
            console.log(error);
        },

        showError: function (error) {
            if (error.details) {
                return layer.alert(error.details, {
                    title: error.message,
                    icon: 2,
                    closeBtn: 0
                });
            } else {
                return layer.alert(http.ajax.defaultError.details, {
                    title: error.message || http.ajax.defaultError.message,
                    icon: 2,
                    closeBtn: 0
                });
            }
        },

        showErrorAndRedirectUrlByYes: function (error, targetUrl) {
            return layer.alert(http.ajax.defaultError401.details, {
                title: http.ajax.defaultError401.message,
                icon: 2,
                closeBtn: 0
            }
            ,
            function (index) {
                http.ajax.handleTargetUrl(targetUrl)
                layer.close(index);
            }
            );
        },

        showErrorAndRedirectUrl: function (error, targetUrl) {
            if (error.details) {
                return layer.alert(error.details, {
                    title: error.message,
                    icon: 2,
                    closeBtn: 0
                    ,
                    end: http.ajax.handleTargetUrl(targetUrl)
                }
                // ,
                // function (index) {
                //     http.ajax.handleTargetUrl(targetUrl)
                //     layer.close(index);
                // }
                );
            } else {
                return layer.alert(http.ajax.defaultError.details, {
                    title: error.message || http.ajax.defaultError.message,
                    icon: 2,
                    closeBtn: 0
                    ,
                    end: http.ajax.handleTargetUrl(targetUrl)
                }
                // ,
                // function (index) {
                //     http.ajax.handleTargetUrl(targetUrl)
                //     layer.close(index);
                // }
                );
            }
        },

        handleTargetUrl: function (targetUrl) {
            if (!targetUrl) {
                parent.location.href = http.appPath;
            } else {
                parent.location.href = targetUrl;
            }
        },

        handleErrorResponse: function (jqXHR, userOptions, $dfd) {
            if (userOptions.customHandleError !== false) {
                switch (jqXHR.status) {
                    case 401:
                        http.ajax.showErrorAndRedirectUrl(http.ajax.defaultError401, http.appPath);
                        break;
                    case 403:
                        http.ajax.showError(http.ajax.defaultError403);
                        break;
                    case 404:
                        http.ajax.showError(http.ajax.defaultError404);
                        break;
                    default:
                        http.ajax.showError(http.ajax.defaultError);
                        break;
                }
            }

            $dfd.reject.apply(this, arguments);
            userOptions.error && userOptions.error.apply(this, arguments);
        },

        ajaxSendHandler: function (event, request, settings) {
            var token = http.ajax.getToken();
            if (!token) {
                return;
            }

            if (!settings.headers || settings.headers[http.ajax.tokenHeaderName] === undefined) {
                request.setRequestHeader(http.ajax.tokenHeaderName, token);
            }
        },

        setToken: function (token) {
            localStorage.setItem(http.ajax.tokenCookieName, token);
        },

        delToken: function () {
            localStorage.removeItem(http.ajax.tokenCookieName);
        },

        getToken: function () {
            return localStorage.getItem(http.ajax.tokenCookieName);
        },

        tokenCookieName :'XSRF-TOKEN',
        tokenHeaderName : 'AUTH-TOKEN',

        getCookieValue: function (key) {
            var equalities = document.cookie.split('; ');
            for (var i = 0; i < equalities.length; i++) {
                if (!equalities[i]) {
                    continue;
                }

                var splitted = equalities[i].split('=');
                if (splitted.length != 2) {
                    continue;
                }

                if (decodeURIComponent(splitted[0]) === key) {
                    return decodeURIComponent(splitted[1] || '');
                }
            }

            return null;
        }
    });

    $(document).ajaxSend(function (event, request, settings) {
        return http.ajax.ajaxSendHandler(event, request, settings);
    });

    exports('mhttp', http);
});