Object.extend(Function.prototype, {
    getArguments: function() {
        var args = [];
        for(var i=0; i<this.arguments.length; i++)
            args.push(this.arguments[i]);
        return args;
    }
}, false);

var MS = {"Browser":{}};

Object.extend(MS.Browser, {
    isIE: navigator.userAgent.indexOf('MSIE') != -1,
    isFirefox: navigator.userAgent.indexOf('Firefox') != -1,
    isOpera: window.opera != null
}, false);

var AjaxPro = {};

AjaxPro.IFrameXmlHttp = function() {};
AjaxPro.IFrameXmlHttp.prototype = {
    onreadystatechange: null, headers: [], method: "POST", url: null, async: true, iframe: null,
    status: 0, readyState: 0, responseText: null,
    abort: function() {
    },
    readystatechanged: function() {
        var doc = this.iframe.contentDocument || this.iframe.document;
        if(doc != null && doc.readyState == "complete" && doc.body != null && doc.body.res != null) {
            this.status = 200;
            this.statusText = "OK";
            this.readyState = 4;
            this.responseText = doc.body.res;
            this.onreadystatechange();
            return;
        }
        setTimeout(this.readystatechanged.bind(this), 10);
    },
    open: function(method, url, async) {
        if(async == false) {
            alert("Synchronous call using IFrameXMLHttp is not supported.");
            return;
        }
        if(this.iframe == null) {
            var iframeID = "hans";
            if (document.createElement && document.documentElement &&
                (window.opera || navigator.userAgent.indexOf('MSIE 5.0') == -1))
            {
                var ifr = document.createElement('iframe');
                ifr.setAttribute('id', iframeID);
                ifr.style.visibility = 'hidden';
                ifr.style.position = 'absolute';
                ifr.style.width = ifr.style.height = ifr.borderWidth = '0px';

                this.iframe = document.getElementsByTagName('body')[0].appendChild(ifr);
            }
            else if (document.body && document.body.insertAdjacentHTML)
            {
                document.body.insertAdjacentHTML('beforeEnd', '<iframe name="' + iframeID + '" id="' + iframeID + '" style="border:1px solid black;display:none"></iframe>');
            }
            if (window.frames && window.frames[iframeID]) this.iframe = window.frames[iframeID];
            this.iframe.name = iframeID;
            this.iframe.document.open();
            this.iframe.document.write("<html><body></body></html>");
            this.iframe.document.close();
        }
        this.method = method;
        this.url = url;
        this.async = async;
    },
    setRequestHeader: function(name, value) {
        for(var i=0; i<this.headers.length; i++) {
            if(this.headers[i].name == name) {
                this.headers[i].value = value;
                return;
            }
        }
        this.headers.push({"name":name,"value":value});
    },
    getResponseHeader: function(name, value) {
        return null;
    },
    addInput: function(doc, form, name, value) {
        var ele;
        var tag = "input";
        if(value.indexOf("\n") >= 0) tag = "textarea";
        
        if(doc.all) {
            ele = doc.createElement("<" + tag + " name=\"" + name + "\" />");
        }else{
            ele = doc.createElement(tag);
            ele.setAttribute("name", name);
        }
        ele.setAttribute("value", value);
        form.appendChild(ele);
        ele = null;
    },
    send: function(data) {
        if(this.iframe == null) {
            return;
        }
        var doc = this.iframe.contentDocument || this.iframe.document;
        var form = doc.createElement("form");
        
        doc.body.appendChild(form);
        
        form.setAttribute("action", this.url);
        form.setAttribute("method", this.method);
        form.setAttribute("enctype", "application/x-www-form-urlencoded");
        
        for(var i=0; i<this.headers.length; i++) {
            switch(this.headers[i].name.toLowerCase()) {
                case "content-length":
                case "accept-encoding":
                case "content-type":
                    break;
                default:
                    this.addInput(doc, form, this.headers[i].name, this.headers[i].value);
            }
        }
        this.addInput(doc, form, "data", data);
        form.submit();
        setTimeout(this.readystatechanged.bind(this), 1);
    }
};

var progids = ["Msxml2.XMLHTTP", "Microsoft.XMLHTTP"];
var _progid = null;

if(typeof ActiveXObject != "undefined") {
    var ie7xmlhttp = false;
    if(typeof XMLHttpRequest == "object") {
        try{ var o = new XMLHttpRequest(); ie7xmlhttp = true; }catch(e){}
    }

    if(typeof XMLHttpRequest == "undefined" || !ie7xmlhttp) {
        XMLHttpRequest = function() {
            var xmlHttp = null;
            if(!AjaxPro.noActiveX) {
                if(_progid) return new ActiveXObject(_progid);
                for(var i=0; i<progids.length && xmlHttp == null; i++) {
                    try {
                        xmlHttp = new ActiveXObject(progids[i]);
                        progid = progids[i];

                    }catch(e){}
                }
            }
            if(xmlHttp == null && MS.Browser.isIE) {
                return new AjaxPro.IFrameXmlHttp();
            }
            return xmlHttp;
        };
    }
}

Object.extend(AjaxPro, {
    noOperation: function() {},
    onLoading: function() {},
    onError: function() {},
    onTimeout: function() {},
    onStateChanged: function() {},
    cryptProvider: null,
    queue: null,
    token: "",
    version: "6.7.2.1",
    ID: "AjaxPro",
    noActiveX: false,
    timeoutPeriod: 10*1000,
    queue: null,

    toJSON: function(o) {
        if(o == null)
            return "null";
        switch(o.constructor) {
            case String:
                var v = [];
                for(var i=0; i<o.length; i++) {
                    var c = o.charAt(i);
                    if(c >= " ") {
                        if(c == "\\" || c == '"') v.push("\\");
                        v.push(c);
                    } else {
                        switch(c) {
                            case "\n": v.push("\\n"); break;
                            case "\r": v.push("\\r"); break;
                            case "\b": v.push("\\b"); break;
                            case "\f": v.push("\\f"); break;
                            case "\t": v.push("\\t"); break;
                            default:
                                v.push("\\u00");
                                v.push(c.charCodeAt().toString(16));
                        }
                    }
                }
                return '"' + v.join('') + '"';
            case Array:
                var v = [];
                for(var i=0; i<o.length; i++)
                    v.push(AjaxPro.toJSON(o[i])) ;
                return "[" + v.join(",") + "]";
            case Number:
                return isFinite(o) ? o.toString() : AjaxPro.toJSON(null);
            case Boolean:
                return o.toString();
            case Date:
                var d = new Object();
                d.__type = "System.DateTime";
                d.Year = o.getUTCFullYear();
                d.Month = o.getUTCMonth() +1;
                d.Day = o.getUTCDate();
                d.Hour = o.getUTCHours();
                d.Minute = o.getUTCMinutes();
                d.Second = o.getUTCSeconds();
                d.Millisecond = o.getUTCMilliseconds();
                d.TimezoneOffset = o.getTimezoneOffset();
                return AjaxPro.toJSON(d);
            default:
                if(typeof o.toJSON == "function")
                    return o.toJSON();
                if(typeof o == "object") {
                    var v=[];
                    for(attr in o) {
                        if(typeof o[attr] != "function")
                            v.push('"' + attr + '":' + AjaxPro.toJSON(o[attr]));
                    }
                    if(v.length>0)
                        return "{" + v.join(",") + "}";
                    return "{}";        
                }
                return o.toString();
        }
    },
    dispose: function() {
        if(AjaxPro.queue != null) {
            AjaxPro.queue.dispose();
        }
    }
}, false);

addEvent(window, "unload", AjaxPro.dispose);

AjaxPro.Request = function(url) {
    this.url = url;
    this.xmlHttp = null;
};

AjaxPro.Request.prototype = {
    url: null,
    callback: null,
    onLoading: AjaxPro.noOperation,
    onError: AjaxPro.noOperation,
    onTimeout: AjaxPro.noOperation,
    onStateChanged: AjaxPro.noOperation,
    args: null,
    context: null,
    isRunning: false,
    abort: function() {
        if(this.timeoutTimer != null) clearTimeout(this.timeoutTimer);
        if(this.xmlHttp) {
            this.xmlHttp.onreadystatechange = AjaxPro.noOperation;
            this.xmlHttp.abort();
        }
        if(this.isRunning) {
            this.isRunning = false;
            this.onLoading(false);
        }
    },
    dispose: function() {
        this.abort();
    },
    getEmptyRes: function() {
        return {
            error: null,
            value: null,
            request: {method:this.method, args:this.args},
            context: this.context,
            duration: this.duration
        };  
    },
    endRequest: function(res) {
        this.abort();
        if(res.error != null) this.onError(res.error, this);
        if(typeof this.callback == "function")
            this.callback(res, this);   
    },
    mozerror: function() {
        if(this.timeoutTimer != null) clearTimeout(this.timeoutTimer);
        var res = this.getEmptyRes();
        res.error = {Message:"Unknown",Type:"ConnectFailure",Status:0};
        this.endRequest(res);
    },
    doStateChange: function() {
        this.onStateChanged(this.xmlHttp.readyState, this);

        if(this.xmlHttp.readyState != 4 || !this.isRunning)
            return;

        this.duration = new Date().getTime() - this.__start;

        if(this.timeoutTimer != null) clearTimeout(this.timeoutTimer);

        var res = this.getEmptyRes();
        if(this.xmlHttp.status == 200 && this.xmlHttp.statusText == "OK") {
            res = this.createResponse(res);
        } else {
            res = this.createResponse(res, true);
            res.error = {Message:this.xmlHttp.statusText,Type:"ConnectFailure",Status:this.xmlHttp.status};
        }
        
        this.endRequest(res);
    },
    createResponse: function(r, noContent) {
        if(!noContent) {
            var responseText = new String(this.xmlHttp.responseText);

            if(AjaxPro.cryptProvider != null && typeof AjaxPro.cryptProvider == "function")
                responseText = AjaxPro.cryptProvider.decrypt(responseText);

            if(this.xmlHttp.getResponseHeader("Content-Type") == "text/xml")
                r.value = this.xmlHttp.responseXML;
            else
                if(responseText != null && responseText.trim().length > 0) {
                    r.json = responseText;
                    eval("r.value = " + responseText + "*/");
                }
        }
        /* if(this.xmlHttp.getResponseHeader("X-" + AjaxPro.ID + "-Cache") == "server") {
            r.isCached = true;
        } */
        return r;
    },
    timeout: function() {
        this.duration = new Date().getTime() - this.__start;
        var r = this.onTimeout(this.duration, this);
        if(typeof r == "undefined" || r != false) {
            this.abort();
        } else {
            this.timeoutTimer = setTimeout(this.timeout.bind(this), AjaxPro.timeoutPeriod);
        }
    },
    invoke: function(method, args, callback, context) {
        this.__start = new Date().getTime();

        if(this.xmlHttp == null)
            this.xmlHttp = new XMLHttpRequest();

        this.isRunning = true;
        this.method = method;
        this.args = args;
        this.callback = callback;
        this.context = context;
        
        var async = typeof callback == "function" && callback != AjaxPro.noOperation;
        
        if(async) {
            if(MS.Browser.isIE)
                this.xmlHttp.onreadystatechange = this.doStateChange.bind(this);
            else {
                this.xmlHttp.onload = this.doStateChange.bind(this);
                this.xmlHttp.onerror = this.mozerror.bind(this);
            }
            this.onLoading(true);
        }
        
        var json = AjaxPro.toJSON(args) + "";
        if(AjaxPro.cryptProvider != null)
            json = AjaxPro.cryptProvider.encrypt(json);
        
        this.xmlHttp.open("POST", this.url, async);
        this.xmlHttp.setRequestHeader("Content-Type", "text/plain; charset=utf-8");
        this.xmlHttp.setRequestHeader("X-" + AjaxPro.ID + "-Method", method);
        
        if(AjaxPro.token != null && AjaxPro.token.length > 0)
            this.xmlHttp.setRequestHeader("X-" + AjaxPro.ID + "-Token", AjaxPro.token);

        if(!MS.Browser.isIE) {
            this.xmlHttp.setRequestHeader("Connection", "close");       // Mozilla Bug #246651
        }

        this.timeoutTimer = setTimeout(this.timeout.bind(this), AjaxPro.timeoutPeriod);

        try{ this.xmlHttp.send(json); }catch(e){}   // IE offline exception

        if(!async) {
            return this.createResponse({error: null,value: null});
        }

        return true;    
    }
};

AjaxPro.RequestQueue = function(conc) {
    this.queue = [];
    this.requests = [];
    this.timer = null;
    
    if(isNaN(conc)) conc = 2;

    for(var i=0; i<conc; i++) {     // max 2 http connections
        this.requests[i] = new AjaxPro.Request();
        this.requests[i].callback = function(res) {
            var r = res.context;
            res.context = r[3][1];

            r[3][0](res, this);
        };
        this.requests[i].callbackHandle = this.requests[i].callback.bind(this.requests[i]);
    }
};

AjaxPro.RequestQueue.prototype = {
    process: function() {
        this.timer = null;
        if(this.queue.length == 0) return;

        for(var i=0; i<this.requests.length && this.queue.length > 0; i++) {
            if(this.requests[i].isRunning == false) {
                var r = this.queue.shift();

                this.requests[i].url = r[0];
                this.requests[i].onLoading = r[3].length >2 && r[3][2] != null && typeof r[3][2] == "function" ? r[3][2] : AjaxPro.onLoading;
                this.requests[i].onError = r[3].length >3 && r[3][3] != null && typeof r[3][3] == "function" ? r[3][3] : AjaxPro.onError;
                this.requests[i].onTimeout = r[3].length >4 && r[3][4] != null && typeof r[3][4] == "function" ? r[3][4] : AjaxPro.onTimeout;
                this.requests[i].onStateChanged = r[3].length >5 && r[3][5] != null && typeof r[3][5] == "function" ? r[3][5] : AjaxPro.onStateChanged;

                this.requests[i].invoke(r[1], r[2], this.requests[i].callbackHandle, r);
                r = null;
            }
        }
        if(this.queue.length > 0 && this.timer == null) {
            this.timer = setTimeout(this.process.bind(this), 10);
        }
    },
    add: function(url, method, args, e) {
        this.queue.push([url, method, args, e]);

        if(this.timer == null) {
            this.timer = setTimeout(this.process.bind(this), 1);
        }
    },
    abort: function() {
        this.queue.length = 0;
        if (this.timer != null) {
            clearTimeout(this.timer);
        }
        this.timer = null;
        for(var i=0; i<this.requests.length; i++) {
            if(this.requests[i].isRunning == true) {
                this.requests[i].abort();
            }
        }
    },
    dispose: function() {
        for(var i=0; i<this.requests.length; i++) {
            var r = this.requests[i];
            r.dispose();
        }
        this.requests.clear();
    }
};

AjaxPro.queue = new AjaxPro.RequestQueue(2);    // 2 http connections

AjaxPro.AjaxClass = function(url) {
    this.url = url;
};

AjaxPro.AjaxClass.prototype = {
    invoke: function(method, args, e) {
        if(e != null) {
            if(e.length != 6) for(;e.length<6;) e.push(null);
            if(e[0] != null && typeof e[0] == "function") {
                return AjaxPro.queue.add(this.url, method, args, e);
            }
        }
        var r = new AjaxPro.Request();
        r.url = this.url;
        return r.invoke(method, args);
    }
};