Ext.define('uas.override.data.Connection', {
    override: 'Ext.data.Connection',

    urlRegexp: /(http|ftp|https):\/\//,

    privates: {
        setupServerOptions: function (options) {
            var serverOptions = Ext.manifest.server, originUrl = options.url;
            if (serverOptions && serverOptions.url && !this.urlRegexp.test(originUrl) &&
                (!serverOptions.urlPattern || new RegExp(serverOptions.urlPattern).test(originUrl))) {
                Ext.Object.merge(options, {
                    url: serverOptions.url + (originUrl.indexOf('/') == 0 ? '' : '/') + originUrl
                });
            }
        },
        parseResponseStatus: function (status) {
            switch (status) {
                case 0:
                    return "无法连接服务";
            }
        }
    },

    request: function (options) {
        if (options && options.url) {
            this.setupServerOptions(options);
        }
        return this.callParent([options]);
    },

    promise: function (config) {
        var me = this, url = config.url,
            params = config.params,
            async = (Ext.isBoolean(config.async) ? config.async : true),
            method = config.method || 'GET',
            timeout = config.timeout || 8000,
            defaultHeaders = {
                'Access-Control-Allow-Origin': '*',
                'Content-Type': 'application/json;charset=UTF-8'
            };
        return new Ext.Promise(function (resolve, reject) {
            Ext.Ajax.request({
                url: url,
                params: params,
                async: async,
                method: method,
                timeout: timeout,
                headers: Ext.apply(defaultHeaders, config.headers),
                success: function (response) {
                    var res = Ext.decode(response.responseText);
                    if (res.success) {
                        return resolve(res);
                    } else {
                        res.message = res.message || '未知错误';
                        return reject(res);
                    }
                },
                failure: function (response) {
                    var res, status = response.status;

                    try {
                        res = JSON.parse(response.responseText);
                    } catch (e) {
                        res = response.responseJson || {
                            message: me.parseResponseStatus(status)
                        };
                    }
                    res.message = res.message || '未知错误';
                    reject(res);
                }
            });
        })
    },

    /**
     * form post
     * 
     * @param {*} config 
     */
    form: function (config) {
        config.headers = config.headers || {};
        Ext.apply(config.headers, {
            'Content-Type': 'application/x-www-form-urlencoded;charset=UTF-8'
        });
        config.method = 'POST';

        return this.promise(config);
    },

    /**
     * payload
     * 
     * @param {*} config 
     */
    payload: function (config) {
        if (Ext.isObject(config.params)) {
            config.params = JSON.stringify(config.params);
        }
        config.method = 'POST';

        return this.promise(config);
    }
});