/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

//Define indexOf for IE
if (!Array.prototype.indexOf) {
    Array.prototype.indexOf = function(obj, start) {
        for (var i = start || 0; i < this.length; i++) {
            if (this[i] == obj) {
                return i;
            }
        }
        return -1;
    };
}

if (!String.prototype.startsWith) {
    String.prototype.startsWith = function(str, matchStr) {
        return str.lastIndexOf(matchStr, 0) === 0;
    };
}

function doLogin() {
    var userName = $("#username")
        .val()
        .trim();
    var passwd = $("#password")
        .val()
        .trim();

    if (userName === "" || passwd === "") {
        $("#errorBox").show();
        $("#signInLoading").hide();
        $("#signIn").removeAttr("disabled");
        $("#errorBox .errorMsg").text("The username or password you entered is blank..");
        return false;
    }

    var baseUrl = getBaseUrl();

    $.ajax({
        data: {
            j_username: userName,
            j_password: passwd
        },
        url: baseUrl + "/j_spring_security_check",
        type: "POST",
        headers: {
            "cache-control": "no-cache"
        },
        success: function() {
            redirect(baseUrl);
        },
        error: function(jqXHR, textStatus, err) {
            $("#signIn").removeAttr("disabled");
            $("#signInLoading").css("visibility", "hidden");

            if (jqXHR.status && jqXHR.status == 412) {
                $("#errorBox").hide();
                $("#errorBoxUnsynced").show();
            } else {
                try {
                    var resp = JSON.parse(jqXHR.responseText);

                    if (resp.msgDesc.startsWith("Username not found") || resp.msgDesc.startsWith("Wrong password")) {
                        $("#errorBox .errorMsg").text("Invalid User credentials. Please try again.");
                    } else if (resp.msgDesc.startsWith("User role credentials is not set properly")) {
                        $("#errorBox .errorMsg").text("User role or credentials is not set properly");
                    } else {
                        $("#errorBox .errorMsg").text("Error while authenticating");
                    }
                } catch (err) {
                    $("#errorBox .errorMsg").text("Something went wrong");
                }
                $("#errorBox").show();
                $("#errorBoxUnsynced").hide();
            }
        }
    });
}

function redirect(baseUrl) {
    $.ajax({
        url: baseUrl + "api/atlas/admin/session",
        success: function(data)  {
            // Default to react UI (v3)
            var PRIMARY_UI = (data && data["atlas.ui.default.version"]) ? data["atlas.ui.default.version"] : "v3";
            var lastUILoad = window.localStorage && window.localStorage.last_ui_load;
            var uiVersion = lastUILoad || PRIMARY_UI;
            var indexpath;

            switch (uiVersion) {
                case "v1":
                    indexpath = "/index.html";      // classic UI
                    break;
                case "v3":
                default:
                    indexpath = "/n3/index.html";   // react UI
                    break;
            }

            indexpath = baseUrl + indexpath;
            if (location.hash.length > 2) {
                indexpath += location.hash;
            }
            window.location.replace(indexpath);
        },
        error: function() {
            window.location.replace("index.html");
        }
    });
}

function getBaseUrl() {
    return window.location.pathname.replace(/\/[\w-]+.(jsp|html)|\/+$/ig, '')
}

$(function() {
    // register handlers
    if (!("placeholder" in HTMLInputElement.prototype)) {
        $("#username , #password").placeholder();
    }
    $("#signIn").on("click", function() {
        $("#signIn").attr("disabled", true);
        $("#signInLoading").css("visibility", "visible");
        doLogin();
        return false;
    });
    $("#loginForm").each(function() {
        $("input").keypress(function(e) {
            // Enter pressed?
            if (e.which == 10 || e.which == 13) {
                doLogin();
            }
        });
    });

    $("#loginForm  li[class^=control-group] > input").on("change", function(e) {
        if (e.target.value === "") {
            $(e.target)
                .parent()
                .addClass("error");
        } else {
            $(e.target)
                .parent()
                .removeClass("error");
        }
    });
    $("#password").on("keyup", function() {
        if (this.value.trim() === "") {
            $(".show-password ").hide();
        } else {
            $(".show-password ").show();
        }
    });
    var showPassword = false;
    $(".show-password").on("click", function() {
        showPassword = !showPassword;
        $("#password").attr("type", showPassword ? "text" : "password");
        $(".show-password").toggleClass("fa-eye-slash fa-eye");
    });
});