/**
 * @depend core.js
 * @depend ../extend.js
 * @depend event.js
 * @depend ../log_error.js
 */
/**
 * Fake XMLHttpRequest object
 *
 * @author Christian Johansen (christian@cjohansen.no)
 * @license BSD
 *
 * Copyright (c) 2010-2013 Christian Johansen
 */
(function (sinonGlobal, global) {
    "use strict";

    function getWorkingXHR(globalScope) {
        var supportsXHR = typeof globalScope.XMLHttpRequest !== "undefined";
        if (supportsXHR) {
            return globalScope.XMLHttpRequest;
        }

        var supportsActiveX = typeof globalScope.ActiveXObject !== "undefined";
        if (supportsActiveX) {
            return function () {
                return new globalScope.ActiveXObject("MSXML2.XMLHTTP.3.0");
            };
        }

        return false;
    }

    var supportsProgress = typeof ProgressEvent !== "undefined";
    var supportsCustomEvent = typeof CustomEvent !== "undefined";
    var supportsFormData = typeof FormData !== "undefined";
    var supportsArrayBuffer = typeof ArrayBuffer !== "undefined";
    var supportsBlob = (function () {
        try {
            return !!new Blob();
        } catch (e) {
            return false;
        }
    })();
    var sinonXhr = { XMLHttpRequest: global.XMLHttpRequest };
    sinonXhr.GlobalXMLHttpRequest = global.XMLHttpRequest;
    sinonXhr.GlobalActiveXObject = global.ActiveXObject;
    sinonXhr.supportsActiveX = typeof sinonXhr.GlobalActiveXObject !== "undefined";
    sinonXhr.supportsXHR = typeof sinonXhr.GlobalXMLHttpRequest !== "undefined";
    sinonXhr.workingXHR = getWorkingXHR(global);
    sinonXhr.supportsCORS = sinonXhr.supportsXHR && "withCredentials" in (new sinonXhr.GlobalXMLHttpRequest());

    var unsafeHeaders = {
        "Accept-Charset": true,
        "Accept-Encoding": true,
        Connection: true,
        "Content-Length": true,
        Cookie: true,
        Cookie2: true,
        "Content-Transfer-Encoding": true,
        Date: true,
        Expect: true,
        Host: true,
        "Keep-Alive": true,
        Referer: true,
        TE: true,
        Trailer: true,
        "Transfer-Encoding": true,
        Upgrade: true,
        "User-Agent": true,
        Via: true
    };

    // An upload object is created for each
    // FakeXMLHttpRequest and allows upload
    // events to be simulated using uploadProgress
    // and uploadError.
    function UploadProgress() {
        this.eventListeners = {
            abort: [],
            error: [],
            load: [],
            loadend: [],
            progress: []
        };
    }

    UploadProgress.prototype.addEventListener = function addEventListener(event, listener) {
        this.eventListeners[event].push(listener);
    };

    UploadProgress.prototype.removeEventListener = function removeEventListener(event, listener) {
        var listeners = this.eventListeners[event] || [];

        for (var i = 0, l = listeners.length; i < l; ++i) {
            if (listeners[i] === listener) {
                return listeners.splice(i, 1);
            }
        }
    };

    UploadProgress.prototype.dispatchEvent = function dispatchEvent(event) {
        var listeners = this.eventListeners[event.type] || [];

        for (var i = 0, listener; (listener = listeners[i]) != null; i++) {
            listener(event);
        }
    };

    // Note that for FakeXMLHttpRequest to work pre ES5
    // we lose some of the alignment with the spec.
    // To ensure as close a match as possible,
    // set responseType before calling open, send or respond;
    function FakeXMLHttpRequest() {
        this.readyState = FakeXMLHttpRequest.UNSENT;
        this.requestHeaders = {};
        this.requestBody = null;
        this.status = 0;
        this.statusText = "";
        this.upload = new UploadProgress();
        this.responseType = "";
        this.response = "";
        if (sinonXhr.supportsCORS) {
            this.withCredentials = false;
        }

        var xhr = this;
        var events = ["loadstart", "load", "abort", "error", "loadend"];

        function addEventListener(eventName) {
            xhr.addEventListener(eventName, function (event) {
                var listener = xhr["on" + eventName];

                if (listener && typeof listener === "function") {
                    listener.call(this, event);
                }
            });
        }

        for (var i = events.length - 1; i >= 0; i--) {
            addEventListener(events[i]);
        }

        if (typeof FakeXMLHttpRequest.onCreate === "function") {
            FakeXMLHttpRequest.onCreate(this);
        }
    }

    function verifyState(xhr) {
        if (xhr.readyState !== FakeXMLHttpRequest.OPENED) {
            throw new Error("INVALID_STATE_ERR");
        }

        if (xhr.sendFlag) {
            throw new Error("INVALID_STATE_ERR");
        }
    }

    function getHeader(headers, header) {
        header = header.toLowerCase();

        for (var h in headers) {
            if (h.toLowerCase() === header) {
                return h;
            }
        }

        return null;
    }

    // filtering to enable a white-list version of Sinon FakeXhr,
    // where whitelisted requests are passed through to real XHR
    function each(collection, callback) {
        if (!collection) {
            return;
        }

        for (var i = 0, l = collection.length; i < l; i += 1) {
            callback(collection[i]);
        }
    }
    function some(collection, callback) {
        for (var index = 0; index < collection.length; index++) {
            if (callback(collection[index]) === true) {
                return true;
            }
        }
        return false;
    }
    // largest arity in XHR is 5 - XHR#open
    var apply = function (obj, method, args) {
        switch (args.length) {
        case 0: return obj[method]();
        case 1: return obj[method](args[0]);
        case 2: return obj[method](args[0], args[1]);
        case 3: return obj[method](args[0], args[1], args[2]);
        case 4: return obj[method](args[0], args[1], args[2], args[3]);
        case 5: return obj[method](args[0], args[1], args[2], args[3], args[4]);
        }
    };

    FakeXMLHttpRequest.filters = [];
    FakeXMLHttpRequest.addFilter = function addFilter(fn) {
        this.filters.push(fn);
    };
    var IE6Re = /MSIE 6/;
    FakeXMLHttpRequest.defake = function defake(fakeXhr, xhrArgs) {
        var xhr = new sinonXhr.workingXHR(); // eslint-disable-line new-cap

        each([
            "open",
            "setRequestHeader",
            "send",
            "abort",
            "getResponseHeader",
            "getAllResponseHeaders",
            "addEventListener",
            "overrideMimeType",
            "removeEventListener"
        ], function (method) {
            fakeXhr[method] = function () {
                return apply(xhr, method, arguments);
            };
        });

        var copyAttrs = function (args) {
            each(args, function (attr) {
                try {
                    fakeXhr[attr] = xhr[attr];
                } catch (e) {
                    if (!IE6Re.test(navigator.userAgent)) {
                        throw e;
                    }
                }
            });
        };

        var stateChange = function stateChange() {
            fakeXhr.readyState = xhr.readyState;
            if (xhr.readyState >= FakeXMLHttpRequest.HEADERS_RECEIVED) {
                copyAttrs(["status", "statusText"]);
            }
            if (xhr.readyState >= FakeXMLHttpRequest.LOADING) {
                copyAttrs(["responseText", "response"]);
            }
            if (xhr.readyState === FakeXMLHttpRequest.DONE) {
                copyAttrs(["responseXML"]);
            }
            if (fakeXhr.onreadystatechange) {
                fakeXhr.onreadystatechange.call(fakeXhr, { target: fakeXhr });
            }
        };

        if (xhr.addEventListener) {
            for (var event in fakeXhr.eventListeners) {
                if (fakeXhr.eventListeners.hasOwnProperty(event)) {

                    /*eslint-disable no-loop-func*/
                    each(fakeXhr.eventListeners[event], function (handler) {
                        xhr.addEventListener(event, handler);
                    });
                    /*eslint-enable no-loop-func*/
                }
            }
            xhr.addEventListener("readystatechange", stateChange);
        } else {
            xhr.onreadystatechange = stateChange;
        }
        apply(xhr, "open", xhrArgs);
    };
    FakeXMLHttpRequest.useFilters = false;

    function verifyRequestOpened(xhr) {
        if (xhr.readyState !== FakeXMLHttpRequest.OPENED) {
            throw new Error("INVALID_STATE_ERR - " + xhr.readyState);
        }
    }

    function verifyRequestSent(xhr) {
        if (xhr.readyState === FakeXMLHttpRequest.DONE) {
            throw new Error("Request done");
        }
    }

    function verifyHeadersReceived(xhr) {
        if (xhr.async && xhr.readyState !== FakeXMLHttpRequest.HEADERS_RECEIVED) {
            throw new Error("No headers received");
        }
    }

    function verifyResponseBodyType(body) {
        if (typeof body !== "string") {
            var error = new Error("Attempted to respond to fake XMLHttpRequest with " +
                                 body + ", which is not a string.");
            error.name = "InvalidBodyException";
            throw error;
        }
    }

    function convertToArrayBuffer(body) {
        var buffer = new ArrayBuffer(body.length);
        var view = new Uint8Array(buffer);
        for (var i = 0; i < body.length; i++) {
            var charCode = body.charCodeAt(i);
            if (charCode >= 256) {
                throw new TypeError("arraybuffer or blob responseTypes require binary string, " +
                                    "invalid character " + body[i] + " found.");
            }
            view[i] = charCode;
        }
        return buffer;
    }

    function isXmlContentType(contentType) {
        return !contentType || /(text\/xml)|(application\/xml)|(\+xml)/.test(contentType);
    }

    function convertResponseBody(responseType, contentType, body) {
        if (responseType === "" || responseType === "text") {
            return body;
        } else if (supportsArrayBuffer && responseType === "arraybuffer") {
            return convertToArrayBuffer(body);
        } else if (responseType === "json") {
            try {
                return JSON.parse(body);
            } catch (e) {
                // Return parsing failure as null
                return null;
            }
        } else if (supportsBlob && responseType === "blob") {
            var blobOptions = {};
            if (contentType) {
                blobOptions.type = contentType;
            }
            return new Blob([convertToArrayBuffer(body)], blobOptions);
        } else if (responseType === "document") {
            if (isXmlContentType(contentType)) {
                return FakeXMLHttpRequest.parseXML(body);
            }
            return null;
        }
        throw new Error("Invalid responseType " + responseType);
    }

    function clearResponse(xhr) {
        if (xhr.responseType === "" || xhr.responseType === "text") {
            xhr.response = xhr.responseText = "";
        } else {
            xhr.response = xhr.responseText = null;
        }
        xhr.responseXML = null;
    }

    FakeXMLHttpRequest.parseXML = function parseXML(text) {
        // Treat empty string as parsing failure
        if (text !== "") {
            try {
                if (typeof DOMParser !== "undefined") {
                    var parser = new DOMParser();
                    return parser.parseFromString(text, "text/xml");
                }
                var xmlDoc = new window.ActiveXObject("Microsoft.XMLDOM");
                xmlDoc.async = "false";
                xmlDoc.loadXML(text);
                return xmlDoc;
            } catch (e) {
                // Unable to parse XML - no biggie
            }
        }

        return null;
    };

    FakeXMLHttpRequest.statusCodes = {
        100: "Continue",
        101: "Switching Protocols",
        200: "OK",
        201: "Created",
        202: "Accepted",
        203: "Non-Authoritative Information",
        204: "No Content",
        205: "Reset Content",
        206: "Partial Content",
        207: "Multi-Status",
        300: "Multiple Choice",
        301: "Moved Permanently",
        302: "Found",
        303: "See Other",
        304: "Not Modified",
        305: "Use Proxy",
        307: "Temporary Redirect",
        400: "Bad Request",
        401: "Unauthorized",
        402: "Payment Required",
        403: "Forbidden",
        404: "Not Found",
        405: "Method Not Allowed",
        406: "Not Acceptable",
        407: "Proxy Authentication Required",
        408: "Request Timeout",
        409: "Conflict",
        410: "Gone",
        411: "Length Required",
        412: "Precondition Failed",
        413: "Request Entity Too Large",
        414: "Request-URI Too Long",
        415: "Unsupported Media Type",
        416: "Requested Range Not Satisfiable",
        417: "Expectation Failed",
        422: "Unprocessable Entity",
        500: "Internal Server Error",
        501: "Not Implemented",
        502: "Bad Gateway",
        503: "Service Unavailable",
        504: "Gateway Timeout",
        505: "HTTP Version Not Supported"
    };

    function makeApi(sinon) {
        sinon.xhr = sinonXhr;

        sinon.extend(FakeXMLHttpRequest.prototype, sinon.EventTarget, {
            async: true,

            open: function open(method, url, async, username, password) {
                this.method = method;
                this.url = url;
                this.async = typeof async === "boolean" ? async : true;
                this.username = username;
                this.password = password;
                clearResponse(this);
                this.requestHeaders = {};
                this.sendFlag = false;

                if (FakeXMLHttpRequest.useFilters === true) {
                    var xhrArgs = arguments;
                    var defake = some(FakeXMLHttpRequest.filters, function (filter) {
                        return filter.apply(this, xhrArgs);
                    });
                    if (defake) {
                        return FakeXMLHttpRequest.defake(this, arguments);
                    }
                }
                this.readyStateChange(FakeXMLHttpRequest.OPENED);
            },

            readyStateChange: function readyStateChange(state) {
                this.readyState = state;

                var readyStateChangeEvent = new sinon.Event("readystatechange", false, false, this);
                var event, progress;

                if (typeof this.onreadystatechange === "function") {
                    try {
                        this.onreadystatechange(readyStateChangeEvent);
                    } catch (e) {
                        sinon.logError("Fake XHR onreadystatechange handler", e);
                    }
                }

                if (this.readyState === FakeXMLHttpRequest.DONE) {
                    // ensure loaded and total are numbers
                    progress = {
                      loaded: this.progress || 0,
                      total: this.progress || 0
                    };

                    if (this.status === 0) {
                        event = this.aborted ? "abort" : "error";
                    }
                    else {
                        event = "load";
                    }

                    if (supportsProgress) {
                        this.upload.dispatchEvent(new sinon.ProgressEvent("progress", progress, this));
                        this.upload.dispatchEvent(new sinon.ProgressEvent(event, progress, this));
                        this.upload.dispatchEvent(new sinon.ProgressEvent("loadend", progress, this));
                    }

                    this.dispatchEvent(new sinon.ProgressEvent("progress", progress, this));
                    this.dispatchEvent(new sinon.ProgressEvent(event, progress, this));
                    this.dispatchEvent(new sinon.ProgressEvent("loadend", progress, this));
                }

                this.dispatchEvent(readyStateChangeEvent);
            },

            setRequestHeader: function setRequestHeader(header, value) {
                verifyState(this);

                if (unsafeHeaders[header] || /^(Sec-|Proxy-)/.test(header)) {
                    throw new Error("Refused to set unsafe header \"" + header + "\"");
                }

                if (this.requestHeaders[header]) {
                    this.requestHeaders[header] += "," + value;
                } else {
                    this.requestHeaders[header] = value;
                }
            },

            // Helps testing
            setResponseHeaders: function setResponseHeaders(headers) {
                verifyRequestOpened(this);
                this.responseHeaders = {};

                for (var header in headers) {
                    if (headers.hasOwnProperty(header)) {
                        this.responseHeaders[header] = headers[header];
                    }
                }

                if (this.async) {
                    this.readyStateChange(FakeXMLHttpRequest.HEADERS_RECEIVED);
                } else {
                    this.readyState = FakeXMLHttpRequest.HEADERS_RECEIVED;
                }
            },

            // Currently treats ALL data as a DOMString (i.e. no Document)
            send: function send(data) {
                verifyState(this);

                if (!/^(get|head)$/i.test(this.method)) {
                    var contentType = getHeader(this.requestHeaders, "Content-Type");
                    if (this.requestHeaders[contentType]) {
                        var value = this.requestHeaders[contentType].split(";");
                        this.requestHeaders[contentType] = value[0] + ";charset=utf-8";
                    } else if (supportsFormData && !(data instanceof FormData)) {
                        this.requestHeaders["Content-Type"] = "text/plain;charset=utf-8";
                    }

                    this.requestBody = data;
                }

                this.errorFlag = false;
                this.sendFlag = this.async;
                clearResponse(this);
                this.readyStateChange(FakeXMLHttpRequest.OPENED);

                if (typeof this.onSend === "function") {
                    this.onSend(this);
                }

                this.dispatchEvent(new sinon.Event("loadstart", false, false, this));
            },

            abort: function abort() {
                this.aborted = true;
                clearResponse(this);
                this.errorFlag = true;
                this.requestHeaders = {};
                this.responseHeaders = {};

                if (this.readyState > FakeXMLHttpRequest.UNSENT && this.sendFlag) {
                    this.readyStateChange(FakeXMLHttpRequest.DONE);
                    this.sendFlag = false;
                }

                this.readyState = FakeXMLHttpRequest.UNSENT;
            },

            error: function error() {
                clearResponse(this);
                this.errorFlag = true;
                this.requestHeaders = {};
                this.responseHeaders = {};

                this.readyStateChange(FakeXMLHttpRequest.DONE);
            },

            getResponseHeader: function getResponseHeader(header) {
                if (this.readyState < FakeXMLHttpRequest.HEADERS_RECEIVED) {
                    return null;
                }

                if (/^Set-Cookie2?$/i.test(header)) {
                    return null;
                }

                header = getHeader(this.responseHeaders, header);

                return this.responseHeaders[header] || null;
            },

            getAllResponseHeaders: function getAllResponseHeaders() {
                if (this.readyState < FakeXMLHttpRequest.HEADERS_RECEIVED) {
                    return "";
                }

                var headers = "";

                for (var header in this.responseHeaders) {
                    if (this.responseHeaders.hasOwnProperty(header) &&
                        !/^Set-Cookie2?$/i.test(header)) {
                        headers += header + ": " + this.responseHeaders[header] + "\r\n";
                    }
                }

                return headers;
            },

            setResponseBody: function setResponseBody(body) {
                verifyRequestSent(this);
                verifyHeadersReceived(this);
                verifyResponseBodyType(body);
                var contentType = this.getResponseHeader("Content-Type");

                var isTextResponse = this.responseType === "" || this.responseType === "text";
                clearResponse(this);
                if (this.async) {
                    var chunkSize = this.chunkSize || 10;
                    var index = 0;

                    do {
                        this.readyStateChange(FakeXMLHttpRequest.LOADING);

                        if (isTextResponse) {
                            this.responseText = this.response += body.substring(index, index + chunkSize);
                        }
                        index += chunkSize;
                    } while (index < body.length);
                }

                this.response = convertResponseBody(this.responseType, contentType, body);
                if (isTextResponse) {
                    this.responseText = this.response;
                }

                if (this.responseType === "document") {
                    this.responseXML = this.response;
                } else if (this.responseType === "" && isXmlContentType(contentType)) {
                    this.responseXML = FakeXMLHttpRequest.parseXML(this.responseText);
                }
                this.progress = body.length;
                this.readyStateChange(FakeXMLHttpRequest.DONE);
            },

            respond: function respond(status, headers, body) {
                this.status = typeof status === "number" ? status : 200;
                this.statusText = FakeXMLHttpRequest.statusCodes[this.status];
                this.setResponseHeaders(headers || {});
                this.setResponseBody(body || "");
            },

            uploadProgress: function uploadProgress(progressEventRaw) {
                if (supportsProgress) {
                    this.upload.dispatchEvent(new sinon.ProgressEvent("progress", progressEventRaw));
                }
            },

            downloadProgress: function downloadProgress(progressEventRaw) {
                if (supportsProgress) {
                    this.dispatchEvent(new sinon.ProgressEvent("progress", progressEventRaw));
                }
            },

            uploadError: function uploadError(error) {
                if (supportsCustomEvent) {
                    this.upload.dispatchEvent(new sinon.CustomEvent("error", {detail: error}));
                }
            }
        });

        sinon.extend(FakeXMLHttpRequest, {
            UNSENT: 0,
            OPENED: 1,
            HEADERS_RECEIVED: 2,
            LOADING: 3,
            DONE: 4
        });

        sinon.useFakeXMLHttpRequest = function () {
            FakeXMLHttpRequest.restore = function restore(keepOnCreate) {
                if (sinonXhr.supportsXHR) {
                    global.XMLHttpRequest = sinonXhr.GlobalXMLHttpRequest;
                }

                if (sinonXhr.supportsActiveX) {
                    global.ActiveXObject = sinonXhr.GlobalActiveXObject;
                }

                delete FakeXMLHttpRequest.restore;

                if (keepOnCreate !== true) {
                    delete FakeXMLHttpRequest.onCreate;
                }
            };
            if (sinonXhr.supportsXHR) {
                global.XMLHttpRequest = FakeXMLHttpRequest;
            }

            if (sinonXhr.supportsActiveX) {
                global.ActiveXObject = function ActiveXObject(objId) {
                    if (objId === "Microsoft.XMLHTTP" || /^Msxml2\.XMLHTTP/i.test(objId)) {

                        return new FakeXMLHttpRequest();
                    }

                    return new sinonXhr.GlobalActiveXObject(objId);
                };
            }

            return FakeXMLHttpRequest;
        };

        sinon.FakeXMLHttpRequest = FakeXMLHttpRequest;
    }

    var isNode = typeof module !== "undefined" && module.exports && typeof require === "function";
    var isAMD = typeof define === "function" && typeof define.amd === "object" && define.amd;

    function loadDependencies(require, exports, module) {
        var sinon = require("./core");
        require("../extend");
        require("./event");
        require("../log_error");
        makeApi(sinon);
        module.exports = sinon;
    }

    if (isAMD) {
        define(loadDependencies);
        return;
    }

    if (isNode) {
        loadDependencies(require, module.exports, module);
        return;
    }

    if (sinonGlobal) {
        makeApi(sinonGlobal);
    }
}(
    typeof sinon === "object" && sinon, // eslint-disable-line no-undef
    typeof global !== "undefined" ? global : self
));
