var _mify_rest = "/m/shop/id/"; //including last slash
var _mify_debug = false;
var _login_with_post = false;
/*var bridgesocket = false; // This is used by ajax() function to determine if this is a call to BRIDGESOCKET.

// Replace the standard window.alert with one that handles BRIDGESOCKET errors.
var default_alert = window.alert;
window.alert = function(message) {

    if (bridgesocket) {
        console.error("BRIDGESOCKET: " + message);

          var i, j, k;
          // ...
          // j acquires some interesting value
          // Who called foo when j took this interesting value?
          //

          var e = new Error('dummy');
          var stack = e.stack.replace(/^[^\(]+?[\n$]/gm, '')
              .replace(/^\s+at\s+/gm, '')
          .replace(/^Object.<anonymous>\s*\(/gm, '{anonymous}()@');

        if (!stack.includes("setup.js")) {
            default_alert("BRIDGESOCKET does not appear to be installed.\n\nPlease follow the instructions on setup.html");
        }
    } else {
        default_alert(message);
    }
};
*/
var MIFY = function(loginResource, debug, loginWithPost) {
    //"use strict";

    var USER_KEY = "MIFY_USER";
    var USER_TOKEN_KEY = "MIFY_U_TOKEN";
    var PWD_TOKEN_KEY = "MIFY_P_TOKEN";
    var LVS_INFO_KEY = "X-LVS-Information";
    var TOKEN_KEY = "X-LVS-HSToken";
    var LVS_MAC_ADDRESS_HEADER_KEY = "X-LVS-MacAddress";
    var SHOP_ACCOUNT_ID = "X-LVS-AccountID";
    var LANGUAGE_KEY = "MIFY_LANG";
    var LANGUAGE_HEADER_KEY =  "Accept-Language";

    var LINE_ID = Masagi.CountryConfig.get('lineId');
    var ORIGIN_ID = Masagi.CountryConfig.get('originId');
    var CURRENCY_ID = Masagi.CountryConfig.get('currency')['id'];

    var loginHandler = null;
    var logoutHandler = null;
    var pendingRequest = null;
    var privateToken = null;

    var messages = {
        provideValidUser2: "Please enter your username.",
        provideValidPass2: "Please enter your password.",
        provideValidUserPass: "Please enter your username and password.",
        validating: "Validating",
        UUIDNotFound: "Error retrieving your UUID. Please try logging in again.",
        loggedIn: "Logged in",
        serverNotResponding: "The server is not responding or is not reachable.",
        newPasswordMatch: "The new passwords must match.",
        registerTerminal: "To continue, please register this terminal.",
        login: "Log in"
    }

    var setLanguage = function(languageisoCode) {
        localStorage.setItem(LANGUAGE_KEY, languageisoCode);
    };

    var getLanguage = function() {
        var lang = localStorage.getItem(LANGUAGE_KEY);

        // make sure that ringfence is in the correct locale
        if (typeof(java) !== "undefined") {
            try {
                java.setLocale(lang); // 'magic'
            } catch (e) {
                // statements to handle any exceptions
                console.log(e); // pass exception object to error handler
            }
        }
        return lang;
    };

    var hideLogin = function() {
        if (document.getElementById("login_box") == undefined) return;
        document.getElementById("username").value = "";
        document.getElementById("password").value = "";
        document.getElementById("login_box").style.display = "none";
    };

    //fill default username
    var lsUser = localStorage.getItem(USER_KEY);
    if (lsUser != undefined && lsUser != null) {
        var usernameBox = document.getElementById("username");
        if (usernameBox) {
            usernameBox.value = lsUser;
        }
    }

    //assign login action
    var loginSubmitButton = document.getElementById("login-submit");
    if (loginSubmitButton) {

        loginSubmitButton.onclick = function(e) {

            var submitButton = this;
            if (submitButton.hasAttribute("disabled")) return;

            var $username = document.getElementById("username");
            var $password = document.getElementById("password");
            var username = $username.value.trim();
            var password = $password.value.trim();



            if (username === "" && password === "") {
                document.getElementById("login-msg").innerHTML = messages.provideValidUserPass;
                $username.focus();
                return false;
            } else if (username === "") {
                document.getElementById("login-msg").innerHTML = messages.provideValidUser2;
                $username.focus();
                return false;
            } else if (password === "") {
                document.getElementById("login-msg").innerHTML = messages.provideValidPass2;
                $password.focus();
                return false;
            }

            submitButton.setAttribute("disabled", "disabled");
            submitButton.innerHTML = '<img src="img/loader.gif" />' + messages.validating;



            var bridgesocket = /^https:\/\/bridgesocket.lvs.co.uk/.test(url);

            var uuid;

            if (bridgesocket === false) {
                uuid = BRIDGESOCKET.uuid(null, null);//MSW.bridgeSocketFound, MSW.noBridgeSocket);
            }

            if (uuid === 'N/A') {
                displayLogin(messages.UUIDNotFound);
                return false;
            }

            var method = "GET";
            var url = loginResource + username + "?password=" + password;
            var body = null;

                if (loginWithPost) {
                method = "POST";
                url = loginResource + username;
                body = JSON.stringify({
                    "password" : password,
                    "lineId" : MIFY.LINE_ID,
                    "originId" : MIFY.ORIGIN_ID
                });
            }

            ajax(method, url, body, function(data, textStatus, xhr ) {
                localStorage.setItem(USER_KEY, username);
                localStorage.setItem(SHOP_ACCOUNT_ID, data['shop']['accountId']);
                            localStorage.setItem("SHOP_DETAILS", JSON.stringify(data['shop']));
                            localStorage.setItem("TILL_DETAILS", JSON.stringify(data['till']));

                submitButton.innerHTML = '<img src="img/accept.png" />' + messages.loggedIn;
                document.getElementById("username").value = lsUser;

                if (loginHandler != null) {
                    loginHandler();
                }
                document.getElementById("login-msg").innerHTML = "";
                document.getElementById("login-loader").style.display = "block";

                if (pendingRequest != null) {
                    ajax(pendingRequest.method,
                        pendingRequest.url,
                        pendingRequest.data,
                        pendingRequest.successCallback,
                        pendingRequest.errorCallback,
                        pendingRequest.additionalHeaders
                    );
                    pendingRequest = null;
                }

                //Initialise the Other Transactions fields at login time.
                Masagi.Other.initFields();
                Masagi.Cashier.load();

            }, function(xhr) {
                var response = {}
                try {
                    var response = JSON.parse(xhr.response);
                }
                catch (e) {
                    response = {
                        'errors' : [xhr.response]
                    }
                }

                console.log(response);
                console.log(response.errors);

                var errors = response.errors || [];
                var loginErrorMsg = '';

                // new format for 403 errors are response = {message:'error message'}
                if (xhr.status === 403 && errors.length === 0){
                    errors.push(response);
                }

                if (xhr.status == 0) {
                    loginErrorMsg = messages.serverNotResponding;
                } else if (errors.length !== 0) {
                    for (var i = errors.length - 1; i >= 0; i--) {
                        if(errors[i].message) {
                            loginErrorMsg += errors[i].message + '\n';
                        }
                    };
                } else {
                    loginErrorMsg = (xhr.statusText != "")? xhr.responseText : xhr.response;
                }

                displayLogin(loginErrorMsg);

            }, null, true);

            e.preventDefault();

            return false;
        }
    }

    var changePasswordOKButton = document.getElementById("change_password_ok");
    if (changePasswordOKButton) {
        changePasswordOKButton.onclick = function(e) {
            var oldPassword = document.getElementById("old_password").value;
            var newPassword1 = document.getElementById("new_password1").value;
            var newPassword2 = document.getElementById("new_password2").value;
            if (newPassword1 !== newPassword2) {
                MIFY.displayChangePassword(messages.newPasswordMatch);
            } else {
                var data = {
                    oldPassword : oldPassword,
                    password : newPassword1
                };

                ajax("PUT", "/m/acc/pwd?token=" + localStorage.getItem(PWD_TOKEN_KEY), JSON.stringify(data), function(data, textStatus, xhr ) {
                    document.getElementById("login-msg").innerHTML = "";
                    document.getElementById("change_password_box").style.display = "none";
                    console.log(data);
                }, function(xhr) {
                    MIFY.displayChangePassword(xhr.response);
                    console.error(xhr);
                }, null, true);
            }

            e.preventDefault();

            return false;
        }
    }

    var changePasswordCancelButton = document.getElementById("change_password_cancel");
    if (changePasswordCancelButton) {
        changePasswordCancelButton.onclick = function(e) {
            document.getElementById("change_password_box").style.display = "none";

            e.preventDefault();

            return false;
        }
    }

    var translateMessages = function(translations) {
        var locale = getLanguage().substr(0,2);
        if(locale !== 'en-GB' || locale !== 'dev') {
            for(prop in messages) {
                messages[prop] = translations[prop];
            }
        }
    };

    var log = function(obj) {
        if (!debug) return;
        console.log(obj);
    };

    var error = function(obj) {
        if (!debug) return;
        console.log(obj);
    };

    var logout = function(reason) {
        localStorage.removeItem(USER_TOKEN_KEY);
        // BRIDGESOCKET.resetuuid();
        if (logoutHandler != null) {
            logoutHandler(reason);
        }
        pendingRequest = null;
        displayLogin(reason);
    };

    var displayLogin = function(msg) {

        var loginBoxElement = document.getElementById("login_box");
        var submitButton = document.getElementById("login-submit");


        if (submitButton) {
            submitButton.removeAttribute("disabled");
            submitButton.innerHTML = messages.login;
        }
        else {
            return false;
        } //exit function when in shop registration page (/setup2.html)

        if(!msg && $(submitButton).is(':visible')){
            return false;
        }

        document.getElementById("login-loader").style.display = "none";
        //fill default username
        var userbox = document.getElementById("username");
        var passbox = document.getElementById("password");

        passbox.value = "";
        if (msg != undefined) {


            // console.log('--> (typeof msg)');
            // console.log((typeof msg));
            // if ((typeof msg) === "object") {
            //  msg = msg.message;
            // }


            try{
                msg = JSON.parse(msg);
                msg = msg.message;
            }
            catch(e){
                //catch and just suppress error
            }

            if (msg.toUpperCase().substr(0,3) === 'MAC') {
                alert (msg + "\n\n" + messages.registerTerminal);
                window.location.href='/setup2.html';
            } else {
                document.getElementById("login-msg").innerHTML = msg;
            }
        } else {
            var lsUser = localStorage.getItem(USER_KEY);
            if (lsUser != undefined && lsUser != null) {
                userbox.value = lsUser;
                passbox.focus();
            } else {
                userbox.value = "";
                userbox.focus();
            }
        }

        loginBoxElement.style.display = "block";

    };

    var hasQueryString = function(url) {
        if(!url) return false
        var pattern = new RegExp(/.*?\?/);
        return pattern.test(url);
    }


    var isQueryStringInUrl = function(url, queryString) {
        if(url.indexOf('?'+queryString) > -1 ||  url.indexOf('&'+queryString) > -1) {
            return true;
        } else {
            return false;
        }
    }

    var insertQueryStringInUrl = function(url, queryString, value) {
        if(hasQueryString(url)) {
            url = url + '&';
        } else {
            url = url + '?'
        }
        return url + queryString + '=' + value;
    }


    var displayChangePassword = function(msg) {
        var loginBoxElement = document.getElementById("change_password_box");
        var okButton = document.getElementById("change_password_ok");
        var cancelButtin = document.getElementById("change_password_cancel");

        okButton.removeAttribute("disabled");
        document.getElementById("login-loader").style.display = "none";


        if (msg != undefined) {
            document.getElementById("change_password_msg").innerHTML = msg;
        } else {
            var old_password = document.getElementById("old_password").value = "";
            document.getElementById("new_password1").value = "";
            document.getElementById("new_password2").value = "";
        }

        loginBoxElement.style.display = "block";
    }

    var ajax = function(method, url, data, successCallback, errorCallback, additionalHeaders, skipToken) {

        //inserts lineId to url if it does not have one yet
        if(method === 'GET' && !isQueryStringInUrl(url, 'lineId')) {
            url = insertQueryStringInUrl(url, 'lineId', LINE_ID);
        }
        if(method === 'GET' && !isQueryStringInUrl(url, 'originId')) {
            url = insertQueryStringInUrl(url, 'originId', ORIGIN_ID);
        }

        if (typeof data === "function") {
            // The caller has not sent us a data parameter, so we shift everything along...
            errorCallback = successCallback;
            successCallback = data;
            data = null;
        }
        // To mimic how JQuery works, the signatures for success() and error() are as follows:
        // success( PlainObject data, String textStatus, jqXHR jqXHR )
        // error( jqXHR jqXHR, String textStatus, String errorThrown )

        var start = new Date().getTime();

        var token = null;
        if (privateToken) {
            token = privateToken;
        } else {
            token = localStorage.getItem(USER_TOKEN_KEY);
        }

        if (token === null && skipToken === undefined) {
            pendingRequest = {
                method: method,
                url: url,
                data: data,
                successCallback: successCallback,
                errorCallback: errorCallback,
                additionalHeaders: additionalHeaders
            };

            displayLogin();

            if (errorCallback) {
                errorCallback(xhr, status, "Not logged in");
            } else {
                log("Call postponed as not logged in: " + method + " " + url);
            }
            return;
        }

        var xhr = new XMLHttpRequest();
        if ("withCredentials" in xhr) {
            // XHR for Chrome/Firefox/Opera/Safari.
            xhr.open(method, url, true); // the 3rd parameter is Async
        } else if (typeof XDomainRequest != "undefined") {
            // XDomainRequest for IE.
            xhr = new XDomainRequest();
            xhr.open(method, url);
        } else {
            errorCallback(xhr, "error", "CORS is not suppported");
            return;
        }

        xhr.timeout = 40000;
        xhr.setRequestHeader("Content-type", "application/json; charset=UTF-8");

        if (token !== undefined && token) {//} && skipToken === undefined) {
            xhr.setRequestHeader(TOKEN_KEY, token);
        }

        if (additionalHeaders != null && additionalHeaders != undefined) {
            for (var header in additionalHeaders) {
                xhr.setRequestHeader(header, additionalHeaders[header]);
            }
        }

        var bridgesocket = /^https:\/\/bridgesocket.lvs.co.uk/.test(url);
        if (bridgesocket === false) {
            xhr.setRequestHeader(LVS_MAC_ADDRESS_HEADER_KEY, BRIDGESOCKET.uuid(null, null/*MSW.bridgeSocketFound, MSW.noBridgeSocket*/));
        }

        var language = MIFY.getLanguage();
        if(language) {
            console.log(language);
            xhr.setRequestHeader(LANGUAGE_HEADER_KEY, language);
        }

        xhr.onload = function(e) {

            var responseReceived = new Date().getTime();

            var token = xhr.getResponseHeader(TOKEN_KEY);
            if (token) {
                localStorage.setItem(USER_TOKEN_KEY, token);
            }

            var rc = parseInt(xhr.status.toString()[0]); // Get the first character.
            if (rc >= 4) {
                error("-------------------");
                error(method + " " + url + "[" + (responseReceived - start) + "ms]");
                error(xhr);

                var errorMsg = xhr.responseText;
                var info = xhr.getResponseHeader(LVS_INFO_KEY);

                if (info != undefined && info != null && info != "") {
                    errorMsg = info;
                }

                error(errorMsg);

                if (xhr.status === 401) {
                    if (errorMsg === "Password expired.") {
                        localStorage.removeItem(USER_TOKEN_KEY);
                        localStorage.setItem(PWD_TOKEN_KEY, token);
                        displayChangePassword(errorMsg);
                    } else {
                        logout(errorMsg);
                    }
                } else {
                    pendingRequest = {
                        method: method,
                        url: url,
                        data: data,
                        successCallback: successCallback,
                        errorCallback: errorCallback,
                        additionalHeaders: additionalHeaders
                    };
                }

                if (errorCallback) {
                    errorCallback(xhr, "error", errorMsg);
                }

                var responseHandled = new Date().getTime();
                error("Handled in " + (responseHandled - responseReceived) + "ms");
                error("-------------------\n");

            } else {
                log("-------------------");
                log(method + " " + url + " [" + (responseReceived - start) + "ms]");
                log(xhr);

                var responseText = "";
                if (xhr.responseText != undefined && xhr.responseText != "") {
                    var type = xhr.getResponseHeader("Content-Type");
                    if (type && type.indexOf("application/json") === 0) {
                        responseText = JSON.parse(xhr.responseText);
                    } else {
                        responseText = xhr.response;
                    }
                }

                if (successCallback) {
                    successCallback(responseText, xhr.status, xhr);
                }

                var responseHandled = new Date().getTime();
                log("Handled in " + (responseHandled - responseReceived) + "ms");
                log("-------------------\n");
            }
        };

        xhr.onerror = function(e) {
            var responseReceived = new Date().getTime();

            error("-------------------");
            error(method + " " + url + " [" + (responseReceived - start) + "ms]");
            error(xhr);

            var errorMsg = xhr.responseText;
            var info = xhr.getResponseHeader(LVS_INFO_KEY);

            if (info != undefined && info != null && info != "") {
                errorMsg += "(" + info + ")";
            }

            error(errorMsg);

            if (xhr.status === 401) {
                logout(info);
            } else if (xhr.status === 0) {
                errorMsg = messages.serverNotResponding;
            }

            if (errorCallback) {
                errorCallback(xhr, "error", errorMsg);
            }

            var responseHandled = new Date().getTime();
            error("Handled in " + (responseHandled - responseReceived) + "ms");
            error("-------------------\n");

            if (xhr.status !== 0) {
                logout(errorMsg);
            }
        };

        xhr.ontimeout = function(e) {
            var responseReceived = new Date().getTime();

            error("-------------------");
            error(method + " " + url + " [" + (responseReceived - start) + "ms]");
            error(xhr);

            if (errorCallback) {
                errorCallback(xhr, "timeout", xhr.responseText);
            }

            var responseHandled = new Date().getTime();
            error("Handled in " + (responseHandled - responseReceived) + "ms");
            error("-------------------\n");

        };

        if (data) {
            xhr.send(data);
        } else {
            xhr.send();
        }
        return xhr;
    };

    return {

        getLanguage: getLanguage,

        setLanguage: setLanguage,

        logout: logout,

        displayLogin: displayLogin,

        translateMessages: translateMessages,

        displayChangePassword : function(msg) {
            displayChangePassword(msg);
        },

        hideLogin: hideLogin,

        isLoggedIn : function() {
            if (localStorage.getItem(USER_TOKEN_KEY)) {
                return true;
            } else {
                return false;
            };
        },

        getShopId : function() {
            return localStorage.getItem(SHOP_ACCOUNT_ID);
        },

        setLoginHandler : function(handler) {
            loginHandler = handler;
        },

        setLogoutHandler : function(handler) {
            logoutHandler = handler;
        },

        setPrivateToken : function(token) {
            privateToken = token;
        },

        get : function(url, data, success, error, additionalHeaders) {
            return ajax('GET', url, data, success, error, additionalHeaders);
        },

        get_no_token : function(url, data, success, error, additionalHeaders) {
            return ajax('GET', url, data, success, error, additionalHeaders, true);
        },

        post : function(url, data, success, error, additionalHeaders) {
            return ajax('POST', url, data, success, error, additionalHeaders);
        },

        post_no_token : function(url, data, success, error, additionalHeaders) {
            return ajax('POST', url, data, success, error, additionalHeaders, true);
        },

        put : function(url, data, success, error, additionalHeaders) {
            return ajax('PUT', url, data, success, error, additionalHeaders);
        },

        getToken : function(url) {
            return localStorage.getItem(USER_TOKEN_KEY);
        },

        // delete is quoted as it's a keyword that is causing issue with the JS minifier
        "delete" : function(url, data, success, error, additionalHeaders) {
            return ajax('DELETE', url, data, success, error, additionalHeaders);
        }
    };
}(_mify_rest, _mify_debug, _login_with_post);