/// <reference path="parseXml.js"/>
/// <reference path="xml2json.js"/>
/// <reference path="xmlWriter.js"/>
var dsutil = dsutil || {};
dsutil.dsnsLookup = (function () {
    //#region DSNSCache
    var dsnsCache = {};
    //#endregion
    return function (dsnsName) {
        //#region DSNS Lookup
        dsnsName = dsnsName || '';
        //#region 查詢完成後CallBack
        var lookupResult = dsnsName;
        var lookupFinish = false;
        var lookupCallBack = [];
        function dsnsLookupFinish(result) {
            lookupResult = result || lookupResult;
            //#region 存入Cache
            if (!!!dsnsCache[dsnsName]) {
                dsnsCache[dsnsName] = lookupResult;
            }
            //#endregion
            lookupFinish = true;
            for (var i = 0; i < lookupCallBack.length; i++) {
                lookupCallBack[i](lookupResult);
            }
        }
        //#endregion
        if (!!dsnsCache[dsnsName]) {
            //#region 回傳Cache內容
            dsnsLookupFinish(dsnsCache[dsnsName]);
            //#endregion
        }
        else {
            //#region 向DSNS Server查詢
            function queryDSNS(target, dsnsList) {
                if (window.XDomainRequest) {
                    var xdr = new XDomainRequest();
                    try {
                        if (xdr) {
                            xdr.onerror = xdr.ontimeout = function () {
                                if (dsnsList.length == 0) {
                                    //                                lookupFinish = true;
                                    //                                for (var i = 0; i < lookupCallBack.length; i++) {
                                    //                                    lookupCallBack[i](lookupResult);
                                    //                                }
                                    dsnsLookupFinish();
                                }
                                else
                                    queryDSNS(target, dsnsList);
                            };
                            xdr.onload = function () {
                                var resp = xml2json.parser(xdr.responseText);
                                //                            if (resp.Envelope.Body.DoorwayURL) {
                                //                                lookupResult = resp.Envelope.Body.DoorwayURL;
                                //                            }
                                //                            lookupFinish = true;
                                //                            for (var i = 0; i < lookupCallBack.length; i++) {
                                //                                lookupCallBack[i](lookupResult);
                                //                            }
                                if (resp && resp.Envelope && resp.Envelope.Body && resp.Envelope.Body.DoorwayURL) {
                                    dsnsLookupFinish(resp.Envelope.Body.DoorwayURL);
                                }
                                else
                                    dsnsLookupFinish();
                            };
                            xdr.onprogress = function () { };
                            xdr.open("POST", dsnsList.pop());
                            xdr.send(
                       parseXml.CreateParser().parse({
                           Header: {
                               TargetService: 'DS.NameService.GetDoorwayURL',
                               SecurityToken: {
                                   '@': ['type'],
                                   Type: 'Basic',
                                   UserName: 'anonymous',
                                   Password: ''
                               }
                           },
                           Body: {
                               DomainName: target
                           }
                       }, 'Envelope')
                    );
                        }
                    }
                    catch (ex) {
                        if (dsnsList.length == 0) {
                            //                        lookupFinish = true;
                            //                        for (var i = 0; i < lookupCallBack.length; i++) {
                            //                            lookupCallBack[i](lookupResult);
                            //                        }
                            dsnsLookupFinish();
                        }
                        else
                            queryDSNS(target, dsnsList);
                    }
                }
                else {
                    try {
                        $.ajax({
                            url: dsnsList.pop(),
                            crossDomain: true,
                            type: 'POST',
                            dataType: 'xml',
                            beforeSend: function (XMLHttpRequest) {
                                XMLHttpRequest.setRequestHeader("Content-Type", "text/plain;charset=UTF-8");
                            },
                            data: parseXml.CreateParser().parse({
                                Header: {
                                    TargetService: 'DS.NameService.GetDoorwayURL',
                                    SecurityToken: {
                                        '@': ['type'],
                                        Type: 'Basic',
                                        UserName: 'anonymous',
                                        Password: ''
                                    }
                                },
                                Body: {
                                    DomainName: target
                                }
                            }, 'Envelope'),
                            success: function (data, textStatus, XMLHttpRequest) {
                                var resp = $(data);
                                //                    if ((resp.find("Header Status Code").text() == "0" && resp.find("Header DSFault").length == 0) || resp.find("Header Status").text() == "0") {
                                //                        lookupResult = resp.find('Body DoorwayURL').text();
                                //                    }
                                //                            if (resp.find('Body DoorwayURL').text()) {
                                //                                lookupResult = resp.find('Body DoorwayURL').text();
                                //                            }
                                //                            lookupFinish = true;
                                //                            for (var i = 0; i < lookupCallBack.length; i++) {
                                //                                lookupCallBack[i](lookupResult);
                                //                            }
                                if (resp.find('Body DoorwayURL').text()) { dsnsLookupFinish(resp.find('Body DoorwayURL').text()); }
                                else { dsnsLookupFinish(); }
                            },
                            error: function (XMLHttpRequest, textStatus, errorThrown) {
                                if (dsnsList.length == 0) {
                                    //                                lookupFinish = true;
                                    //                                for (var i = 0; i < lookupCallBack.length; i++) {
                                    //                                    lookupCallBack[i](lookupResult);
                                    //                                }
                                    dsnsLookupFinish();
                                }
                                else
                                    queryDSNS(target, dsnsList);
                            }
                        });
                    }
                    catch (ex) {
                        if (dsnsList.length == 0) {
                            //                        lookupFinish = true;
                            //                        for (var i = 0; i < lookupCallBack.length; i++) {
                            //                            lookupCallBack[i](lookupResult);
                            //                        }
                            dsnsLookupFinish();
                        }
                        else
                            queryDSNS(target, dsnsList);
                    }
                }
            }
            queryDSNS(
            dsnsName
            , [
                'http://dsns5.ischool.com.tw/dsns/dsns',
                'http://dsns4.ischool.com.tw/dsns/dsns',
                'http://dsns3.ischool.com.tw/dsns/dsns',
                'http://dsns2.ischool.com.tw/dsns/dsns',
                'http://dsns1.ischool.com.tw/dsns/dsns'
              ]
            );
            //#endregion
        }
        return {
            complite: function (fn) {
                lookupCallBack.push(fn);
                if (lookupFinish) {
                    fn(lookupResult);
                }
            }
        };
        //#endregion
    }
})();