var ChatBot = function () {

    //// common vars
    // custom patterns and rewrites
    var patterns;

    // the bot's name
    var botName;

    // the human's name
    var humanName;

    // the html (text / image etc.) that is displayed when the bot is busy
    var thinkingHtml;

    // a selector to all inputs the human can type to
    var inputs;

    // whether to list the capabilities below the input field
    var inputCapabilityListing;

    // the example phrases that can be said (to be listed under the input field)
    var examplePhrases = [];

    // the engines to use for answering queries that are not caught by simple patterns
    var engines;

    // whether a sample conversation is running
    var sampleConversationRunning = false;

    // a callback for after a chat entry has been added
    var addChatEntryCallback;

    // list of normalize human text before check pattern
    var normalizer = [];

    // list all the predefined commands and the commands of each engine
    function updateCommandDescription() {
        var description = '';

        // first explain manually defined commands and then all by all used engines
        var descriptions = [];

        var i, j;
        for (i = 0; i < patterns.length; i++) {
            if (patterns[i].description != undefined) {
                descriptions.push(patterns[i].description);
            }
        }
        for (i = 0; i < engines.length; i++) {
            var caps = engines[i].getCapabilities();
            for (j = 0; j < caps.length; j++) {
                descriptions.push(caps[j]);
            }
        }

        examplePhrases = [];
        for (i = 0; i < descriptions.length; i++) {
            var pdesc = descriptions[i].replace(/(['"][^'"]+['"])/gi, '<span class="phraseHighlight">$1</span>');
            pdesc = pdesc.replace(/(\[[^\[\]]+\])/gi, '<span class="placeholderHighlight">$1</span>');
            //console.log(pdesc);
            var matches = pdesc.match(/<span class=['"]phraseHighlight["']>['"](.+?)['"]<\/span>/gi);
            //console.log(matches);
            if (matches != null) {
                //console.log(matches);
                for (j = 0; j < matches.length; j++) {
                    var cleanMatch = matches[j].replace(/<\/?span[^>]*>/gi,'');
                    examplePhrases.push(cleanMatch.replace(/['"]/gi,''));
                }
            }
            description += '<div class="commandDescription">' + pdesc + '</div>';
        }

        var datalist = $('#chatBotCommands');
        if (datalist.size() == 0) {
            datalist = $('<datalist id="chatBotCommands">');
            $('body').append(datalist);
        } else {
            datalist.html('');
        }

        for (i = 0; i < examplePhrases.length; i++) {
            datalist.append($('<option value="'+examplePhrases[i]+'"></option>'));
        }

        //console.log(examplePhrases);

        $('#chatBotCommandDescription').html(description);
    }

    // type writer
    function playConversation(state, pauseLength) {

        setTimeout(function() {
            var newValue = '';
            if ($(inputs).val() != '|') {
                newValue += $(inputs).val();
            }
            newValue += state.currentInput.slice(state.start,state.start+1);
            $(inputs).val(newValue);
            state.start++;

            if (state.start < state.currentInput.length) {
                // keep typing
                playConversation(state, pauseLength);
            } else {

                // press enter and wait for some time and then write the next entry
                ChatBot.addChatEntry(state.currentInput, "human");
                ChatBot.react(state.currentInput);
                $(inputs).val(state.currentInput);

                setTimeout(function() {
                    state.conversationArrayIndex++;
                    state.conversationArrayIndex = state.conversationArrayIndex % state.conversationArray.length;

                    // did we cycle through the conversation array? if so, stop
                    if (state.conversationArrayIndex == 0) {
                        $('#chatBotConversationLoadingBar').remove();
                        sampleConversationRunning = false;
                        return;
                    }

                    state.start = 0;
                    $(inputs).val('|');
                    state.currentInput = state.conversationArray[state.conversationArrayIndex];
                    playConversation(state, pauseLength);
                }, pauseLength);

                var chclb = $('#chatBotConversationLoadingBar');
                if (chclb.size() == 0) {
                    chclb = $('<div id="chatBotConversationLoadingBar"></div>');
                    chclb.css('position','absolute');
                    $('body').append(chclb);
                }

                var left =  $(inputs).offset().left;
                var top = $(inputs).offset().top + $(inputs).outerHeight() - 3;
                chclb.css('left',left+'px');
                chclb.css('top',top+'px');

                chclb.animate({
                    width: $(inputs).outerWidth()+'px',
                }, pauseLength, function() {
                    chclb.css('width','0');
                });

            }
        }, Math.random()*120+10);
    }

    return {
        Engines: {
            // the webknox API: http://webknox.com/api
            webknox: function (apiKey) {

                // patterns that the engine can resolve
                var capabilities = [
                    "Ask for stock prices like 'stock price apple' or '[company] stock'.",
                    "Ask for distances as in 'how far is Perth from Melbourne' or 'distance between [place1] and [place2]'.",
                    "Want to know what the weather is like, just ask like 'weather in San Diego, California'.",
                    "Let WebKnox tell you a joke, just say 'tell me a joke'.",
                    "Convert units, e.g. '2.4 miles in kilometers' or '4 tablespoons to ml?'.",
                    "Get synonyms for a word, e.g. 'synonyms for car'.",
                    "Ask for quotes like 'quotes about [topic]' or 'quotes about love'.",
                    "Ask for quotes from a person 'quotes by [person]' or 'quotes by aristotle'.",
                    "Ask for recipes like 'spaghetti recipes' or 'chocolate donuts'.",
                    "Ask for nutrient contents like 'vitamin a in 2 carrots' or 'calories is 1 cup of butter'.",
                    "Convert ingredients like '2 cups of butter in grams'.",
                    "If you want more results, just say 'more'.",
                    "For more similar results say 'more like the first/second/third...'.",
                    "Or just ask anything that comes to mind like 'Who was pope in 1499?' or 'Who directed braveheart?'.",
                ];

                // the context id for the current conversation
                var contextId = Math.random() * 100000;

                return {
                    react: function (query) {
                        $.get('https://webknox-question-answering.p.mashape.com/questions/converse?mashape-key=' + apiKey + '&contextId=' + contextId + '&text=' + encodeURIComponent(query), function (data) {

                            var content = data.answerText;

                            if (data.media != undefined) {

                                content += '<br>';

                                for (var i = 0; i < data.media.length; i++) {
                                    var ob = data.media[i];
                                    content += '<div class="imgBox">' +
                                        '<img src="' + ob.image + '" />' +
                                        '<div class="title">' + ob.title + '</div>' +
                                        '<div class="actions">' +
                                        '<div class="button blue" onclick="document.location.href=\'' + ob.link + '\'">Details</div>' +
                                        '<br>' +
                                        '<div class="button blue" onclick=" ChatBot.addChatEntry(\'more like number ' + (i + 1) + '\',\'human\');ChatBot.react(\'more like ' + (i + 1) + '\');">More like this</div>' +
                                        '</div>' +
                                        '</div>';
                                }

                            }

                            ChatBot.addChatEntry(content, "bot");
                            ChatBot.thinking(false);
                        });
                    },
                    getCapabilities: function () {
                        return capabilities;
                    },
                    getSuggestUrl: function() {
                        return 'https://webknox-question-answering.p.mashape.com/questions/converse/suggest?mashape-key=' + apiKey + '&query=';
                    }
                }
            },

            // the spoonacular API: http://spoonacular.com/food-api
            spoonacular: function (apiKey) {

                // patterns that the engine can resolve
                var capabilities = [
                    "Ask for recipes like 'chicken recipes' or 'spaghetti with shrimp'",
                    "Ask for nutrient contents like 'vitamin a in 2 carrots' or 'calories is 1 cup of butter'",
                    "Convert something with '2 cups of butter in grams'",
                    "If you want more results, just say 'more'",
                    "For more similar results say 'more like the first/second/third...'",
                    "Let spoonacular tell you a joke, just say 'tell me a joke'.",
                    "Want to learn some food trivia, just say 'food trivia'.",
                ];

                // the context id for the current conversation
                var contextId = Math.random() * 100000;

                return {
                    react: function (query) {
                        $.get('https://spoonacular-recipe-food-nutrition-v1.p.mashape.com/food/converse?mashape-key=' + apiKey + '&contextId=' + contextId + '&text=' + encodeURIComponent(query), function (data) {

                            var content = data.answerText;

                            if (data.media != undefined) {

                                content += '<br>';

                                for (var i = 0; i < data.media.length; i++) {
                                    var ob = data.media[i];
                                    content += '<div class="imgBox">' +
                                        '<img src="' + ob.image + '" />' +
                                        '<div class="title">' + ob.title + '</div>' +
                                        '<div class="actions">' +
                                        '<div class="button blue" onclick="document.location.href=\'' + ob.link + '\'">Details</div>' +
                                        '<br>' +
                                        '<div class="button blue" onclick=" ChatBot.addChatEntry(\'more like number ' + (i + 1) + '\',\'human\');ChatBot.react(\'more like ' + (i + 1) + '\');">More like this</div>' +
                                        '</div>' +
                                        '</div>';
                                }

                            }

                            ChatBot.addChatEntry(content, "bot");
                            ChatBot.thinking(false);
                        });
                    },
                    getCapabilities: function () {
                        return capabilities;
                    },
                    getSuggestUrl: function() {
                        return 'https://spoonacular-recipe-food-nutrition-v1.p.mashape.com/food/converse/suggest?mashape-key=' + apiKey + '&query=';
                    }
                }
            },

            duckduckgo: function () {

                // patterns that the engine can resolve
                var capabilities = [
                    "Ask what something is like 'What is DNA'?",
                    "Ask where something is like 'Where is China'?",
                    "Ask about a person like 'Who is Bill Gates'?",
                    "Say a movie/person/location name like 'Braveheart' to get information about that entity",
                    "Say a something like 'simpsons characters' to get information about that phrase",
                ];

                return {
                    react: function (query) {
                        $.ajax({
                            type: 'GET',
                            url: 'https://api.duckduckgo.com/?format=json&pretty=1&q=' + encodeURIComponent(query),
                            dataType: 'jsonp'
                        }).done(function (data) {

                            var content = data.AbstractText;

                            // no direct answer? tell about related topics then
                            if (content == '' && data.RelatedTopics.length > 0) {

                                content = '<p>I found multiple answers for you:</p>';

                                var media = [];
                                for (var i = 0; i < data.RelatedTopics.length; i++) {
                                    var ob = data.RelatedTopics[i];
                                    if (ob.Result == undefined) {
                                        continue;
                                    }
                                    if (ob.Icon.URL != '' && ob.Icon.URL.indexOf(".ico") < 0) {
                                        media.push(ob.Icon.URL);
                                    }

                                    content += '<p>' + ob.Result.replace("</a>", "</a> ") + '</p>';
                                }

                                ///content += '<img src="' + ob.Icon.URL + '" align="left" />' +

                                for (i = 0; i < media.length; i++) {
                                    var m = media[i];
                                    content += '<img src="' + m + '" style="margin-right:5px"/>';
                                }

                            } else {

                                if (data.Image != undefined && data.Image != '') {

                                    content += '<br>';

                                    content += '<div class="imgBox">' +
                                        '<img src="' + data.Image + '" />' +
                                        '<div class="title">' + data.Heading + '</div>' +
                                        '</div>';

                                }

                            }

                            ChatBot.addChatEntry(content, "bot");
                            ChatBot.thinking(false);
                        });
                    },
                    getCapabilities: function () {
                        return capabilities;
                    },
                    getSuggestUrl: function() {
                        return null;
                    }
                }
            }
        },
        init: function (options) {
            var settings = jQuery.extend({
                // these are the defaults.
                botName: 'Bot',
                humanName: 'You',
                thinkingHtml: '<img src="data:image/gif;base64,R0lGODlhZAANAOMAAHx+fNTS1JyenOzq7IyOjPz6/ISChKSipPz+/P///wAAAAAAAAAAAAAAAAAAAAAAACH/C05FVFNDQVBFMi4wAwEAAAAh+QQJCQAJACwAAAAAZAANAAAEyzDJSau9OOvNu/9gKI5kaZ7ohBQFYq3ty7oVTFO2HNezfqs93k4VEAgCP0TxmFwicc6m8UmcSplQaxZb5UoGBACAMKCAxWRzeFyenNlqdPu7Trvr88TbTpfH4RMBBgAGBgEUAYSEh4GKhoiOjBKJhI+NlZIJlIWZm5aTYpyQmH98enileXuqqHd+roB9saevsqZKWhMFURS7uRK+Xgm4wsRUEsZXx8O8XcvDLAUW0dIV1NPR2Cza1b3Z1t/e2+DjKebn6Onq6+zt7hYRACH5BAkJABYALAAAAABkAA0AhAQCBISChMzOzExKTOzq7BweHKSipNza3Hx6fPT29CwuLLSytPz+/AwODIyOjNTW1ExOTNze3Hx+fPz6/DQyNLS2tP///wAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAX+oCWOZGmeaKqubMsyScK4dG3fLvMglBJEM5xwSEwdFIAkgPIgMSaToBMqHT2jpmtVpM1SvdhSV/wVTQZK5WDCfRgMj6ruHXe64fJ73arP0/14dn+CgRYCBWlJBQIiBA4SEg4EJI6QkpSPkZMjlZqYlpuNmZeco6EWnaSioCIVDYkADQsiDwEBEgFNIwe2uLoivLe5JLy4w7vCx8DJvxbFts3Pys7MIoewi6sBqqimn56lrOHgq+Td4uXcqZsTELADCW2DfPPyhfZ7+ID5FnP3/X0I5TuSRkGzK2zIhJmy0AqUhAwhOoQCRiKXhxXtIFCgAAG/IiBD3pgQw6LIkygGU6pcaSMEACH5BAkJAB0ALAAAAABkAA0AhAQCBISChNTS1ERCROzu7CQiJKSipGxubNza3Pz6/CwuLLSytHx6fAwODJSSlExOTAQGBISGhNTW1ERGRPT29CwqLKSmpHRydNze3Pz+/DQyNLS2tHx+fP///wAAAAAAAAX+YCeOZGmeaKqubOuiGUVlb23feIZZBkaLGUlAown4cMikMmNQQCAKww9RAVgBGgkpk0j8tt3viOs1kcXAsFldOq/LI0HjCmgIOpQH3fpIACUWFhJiQYGDW4CChImHY4yLhpCKiJEjF3sAFx0CBZgFdx0EDhwBDgQkoqSmqA4Mpacjoq6rsa2vrLOwIrK3tbkjA5gTHRtzew0LIggBHKQIJMscrs8j0dPQzNfV2QHUytzeHdbd2NLkIgeYB5ude5+7oxy08AzyuqHx8/jN+qn2rPzu+euXT5ccOnbw6NkzwU+HDAJ4NPpTaUQCQAYmPoyYkRBHjRAlehS55eOXBAY6KkAAEMWhhCpXFIRzU6JLlzdoHrIBA4dnTpo+22AwYADBlyAMFCjgYFSJ06dQE8hwCLWq1atYs9YIAQAh+QQJCQAjACwAAAAAZAANAIUEAgSEgoTU0tREQkQkIiTs7uykoqQUEhTc3tx0cnQsLiy0trT8+vwMDgyUkpTc2txMTkysqqwcGhzk5uR8fnw0NjQEBgSEhoTU1tRERkQsKiz09vSkpqQUFhTk4uR0dnQ0MjS8urz8/vz///8AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAG/sCRcEgsGo/IpHLJbDqfQ9FmI4Jar9ijqFoUITgcBHckwgRAlYtnnG27jxvOYMDZDBkGkMUCMnAfGgCCACAPRCIMDGxCiIpGjYtkiZGQj5OWjncXFoMXDEICDYMADQIjGxCjghCfZBgRHA9sIg8cERiztbe5triHur5RwLy7QxMSoxIeQh+qAB8jAgTOBKYjBQ4UFA4FRNja3N7Z291D3+Ti4OVC5+Hm4+4jD86GIwPOGSMhoqoNC0IPLmi7UA9gAG0BCsoTSCEhkYAIFUJsKJGhwyETL47w0GHUgQlCEjhLMALDNFXV2MFbdy1bgHgtG8L89pIlzZkuccpcx4DCaCgKrQRwGlTqVCpVEOy4imBA1i8DHIIxegBVKhmqUXNV1WrAahkOXdlsMDDHgFIyBhTsUWCgFYZAgxQoTETFSKJEmFodupsXU6S7kSQ9+tJ0TBkKCkBQEPOmsWM3DKbofUy5suXLl4MAACH5BAkJACMALAAAAABkAA0AhQQCBISChNTS1ERCRCQiJOzu7KSipBQSFNze3HRydCwuLLS2tPz6/AwODJSSlNza3ExOTKyqrBwaHOTm5Hx+fDQ2NAQGBISGhNTW1ERGRCwqLPT29KSmpBQWFOTi5HR2dDQyNLy6vPz+/P///wAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAb+wJFwSCwaj8ikcslsOp9N0WYjglqv2KOoWhQhOBwEdyTCBECVi2ecbWdFDAZ7tOEMBpzNkGEAWSwgBlwPGgCGACAPRHByRoxzZHGQj46SlY2LDxwRGGMMFxaHFwxCAg2HAA0CdBCohhCkZBgRHA9sIpqct7mdmZu9Q7i/u8NEBQ4UFA4FQxMSqBIeQh+uAB8jAgTVBKsjx8nLxsjKzEPf5OLg5ULn4ebj7kIPF8kBivLV9wPVGSMhp64aLJBHj4I9IvPq3SOoEGHBg0MSGlw4QiJEdsgCxPPQAdWBCUISVEswAoM2V9wwqkuncZ23jPFeGoz5rSXLmLgMcAA2ggFlBVQUYgkIdUgVq2oQ9MiKYIAnmQcGmu7S6TTnzqlSF2HgkHVRnFhDNhi4Y0ApGQMK/igwEAtDoUMKKH6FNNdI3SJ3ieTdYwkKHEdfDNgKhoGCAhAUxLhZzLgxgylgG0ueTLly4yAAIfkECQkAIwAsAAAAAGQADQCFBAIEhIKE1NLUREJEJCIk7O7spKKkFBIU3N7cdHJ0LC4stLa0/Pr8DA4MlJKU3NrcTE5MrKqsHBoc5ObkfH58NDY0BAYEhIaE1NbUREZELCos9Pb0pKakFBYU5OLkdHZ0NDI0vLq8/P78////AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABv7AkXBILBqPyKRyyWw6n9CjaLMRRa/Y7FBkLYoQHA6iOxJhAqDKxUPWupEiBqMtjM+LG85gwNkMGQYgFhYgBl0PGgCKACAPRHZ0ZXKRkEaVXpNeDxwRGG0im51kDBcWixcMQgINiwANAiMbEK2KEKllGBEcD5+hno++vZy/W8FEBQ4UFA4Fx8nLzUITEq0SHkIftAAfIwIE2gSwI8jKzM7l0ULk0OfsQ+vmQw8XygGO8vQB9vLa9wPaGUaEYEWrwQIh8+rdQ0iPwj58CokkdLhwxMSH6pIFiJcR3RAPHVodmCAkgbYEIzB8oxWuo7uOG9ON08hxpsOa5GICM8CBWGidBzx9MqDQisItAaYWvYo1ixYEP7giGPBZBujUXkGxXn2EgcPWR3Jugb1DZIOBPQagljGgYJACA7cwJFqkoGLYSHeN5C2yl0jfN5IsgTHAawsGCgpAUBgDuLFjLAyoiH1MubLly0WCAAAh+QQJCQAjACwAAAAAZAANAIUEAgSEgoTU0tREQkQkIiTs7uykoqQUEhTc3tx0cnQsLiy0trT8+vwMDgyUkpTc2txMTkysqqwcGhzk5uR8fnw0NjQEBgSEhoTU1tRERkQsKiz09vSkpqQUFhTk4uR0dnQ0MjS8urz8/vz///8AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAG/sCRcEgsGo/IpHLJbDqf0KhosxFFr9jsUGQtihAcDqI7EmECoMrFQ9ZmRQxGWwiXG+vzDWcw4GyGDAYgFhYgBl0PGgCLACAPRHh3cXNlk5J2kA8cERhtIpqcnqCdgBcWjBcMQgINjAANAiMbEK6LEKplGBEcD6KbpFujvqFEBQ4UFA4FxcfJy0PGyMpDExKuEh5CH7UAHyMCBNwEsSPRzszSz0Lm09DN7UIPF8gBj0PyFAH1RPj69iMPuNkbwC3DiBCtajVYEG9evn8AHe67JxEivofoAsAr904dx3RDPHRwdWCCkATcEozAEK7WuHUdM26MptEjzY2fDHAARueBZ06eZXzuJMOAgisKuAScYgRLFq1aEP7kimAAaM6qogxghYSBw1ZIcXCBxUQkbB4DfAxILWNAASEFBnBhUMRIAUSzRvAW0VvWkhsncO6AMdBrCwYKCkBQGPO3sWM3DKiIfUy5suXLQQAAIfkECQkAIwAsAAAAAGQADQCFBAIEhIKE1NLUREJEJCIk7O7spKKkFBIU3N7cdHJ0LC4stLa0/Pr8DA4MlJKU3NrcTE5MrKqsHBoc5ObkfH58NDY0BAYEhIaE1NbUREZELCos9Pb0pKakFBYU5OLkdHZ0NDI0vLq8/P78////AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABv7AkXBILBqPyKRyyWw6n9CoUrTZiKTYbFbEMIoQHA7iKhRhAqDKxUPWLrmM9hAuLzPi3nt9wxkMOBtzBiAWFiAGZA8aAIwAIA9EdHl4RZKRDxwRGHIimJqcnpuXmaJCDBcWjRddIwINjQANAiMbELCMEKxmERwPoKS/n0QFDhQUDgXDxcfJQ8TGyMrQzSMTErASHkIftwAfrQTdBLMjz8zS587L0UMPF8YBkO3vAfFE7hT18kL4+u3d8gZ0yzAixKtbDRbwe5dv3wh8De8xtKcuHzsh5i6WW0dt47QhHjrAOjBBSIJuCUZgCHdrHEaO0gJofCazYycDHEqVeYBT52eImzlB9WzDgAIsCqwEpGoki5atWxAC/cQQwYDPm1Y5YeCQtdIdVpH0GPlaZwTZIhsM+DEg9acBBYUUGGCFYVEjBQ7PFtFLhK8bN1y8gDHgaw4GCgpAUBjzt7FjNwyqgH1MubLlLEEAACH5BAkJACMALAAAAABkAA0AhQQCBISChNTS1ERCRCQiJOzu7KSipBQSFNze3HRydCwuLLS2tPz6/AwODJSSlNza3ExOTKyqrBwaHOTm5Hx+fDQ2NAQGBISGhNTW1ERGRCwqLPT29KSmpBQWFOTi5HR2dDQyNLy6vPz+/P///wAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAb+wJFwSCwaj8ikcslsOp/QqFQo2mxE06w2KmIYRQgOB4GlYgKgysVT3nYZ7eE7TmXAv3b6aF7ccAYDHBtyBiAWFiAGZQ8aAI4AIA9EfEWUcg8cERhxIpianJ6bk6GgmaJCDBcWjxdeIwINjwANAiMbELKOEK4iGBEcD6WfRAUOFBQOBcTGyMpDxcfJy9HOQtDNQx4SshIeQh+5AB+vBOEEtSPX0s/M60IPF8cBkkPwFAHzRPb49O/x/Pri3ev3IBy9AeEyjAgRK1eDBf7k9RvxIIDEaQHcpWtXbSO1adjY3XPnoYOsAxOEJAiXYASGcrnOWeOIUWMnAxxOUXmAU+djHp45QfUUGnQIAwqyKLgSsOoRLVu4ckEYtMeXAZ83i06y42rrnSJc9YQ1MpbIBgOADFDdY0DBIQUGXGFo9EjBxLJE8G7Zm6TLlzAGgsnBQEEBCApk+CpePIWBla6MI0uebCQIACH5BAkJACMALAAAAABkAA0AhQQCBISChNTS1ERCRCQiJOzu7KSipBQSFNze3HRydCwuLLS2tPz6/AwODJSSlNza3ExOTKyqrBwaHOTm5Hx+fDQ2NAQGBISGhNTW1ERGRCwqLPT29KSmpBQWFOTi5HR2dDQyNLy6vPz+/P///wAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAb+wJFwSCwaj8ikcslsOp/QqJQp2mxE06w2KmIYRQgOB4EVijABUOXiKVMZDPewG//C5ea7vV6k4zccAwMcG3MGIBYWIAZlDxoAkAAgD0R+fQ8cERhyIpianJ6blaGgmaJzpEMMFxaRF14jAg2RAA0CIxsQtJAQsGcRHA9yBQ4UFA4FRMTGyMrFx8lDy9DOzNFC081CHhK0Eh5CH7sAH7EE4wS3I9nXIw8XxgGUQ+8UAfJE9ffzQvr49PDs8XMX8J+7cfMGjMswIsSsXQ0W9Cs4cFkAbdieYVynsR27ahc9Fgs5xEMHWgcmCEkwLsEIDOd2pctobZQBDqfMPLiZc0RiJ56ggNrEGZSoKgq0KMAS0CqSLVy6dkEo5BNDBAM9fcKBVUlPka14RoA1Mvar1yEbDAgyQNWnAQWJFBiAheFRJAUDy27Zm6XLlzAGhM3BQEEBCApk+CpePIWBFa6MI0teHAQAIfkECQkAIwAsAAAAAGQADQCFBAIEhIKE1NLUREJEJCIk7O7spKKkFBIU3N7cdHJ0LC4stLa0/Pr8DA4MlJKU3NrcTE5MrKqsHBoc5ObkfH58NDY0BAYEhIaE1NbUREZELCos9Pb0pKakFBYU5OLkdHZ0NDI0vLq8/P78////AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABv7AkXBILBqPyKRyyWw6n9CodDoUbTYiqnbrFDGMIgSHg8gKRZgAqHLxmM8Mxrsan8Pl4HoeX/TyiX52GxwDAxwbVQYgFhYgBmYPGgCTACAPVQ8cERhzIpmbnZ+cgKKhmqOYp6agQwwXFpQXXyMCDZQADQIjGxC3kxCzBQ4UFA4FRMLExsjDxcdDyc7Mys9C0cvQzdgjHhK3Eh5CH74AH7QE5AS6Iw8XxAGXQ+0UAfBE8/XxQvj28u70+tj967dvoL4H5OINIJdhRAhbvhossDYswLYR16ph1KYx4zSLHSteTAZyiIcOtw5MEJKAXIIRGND5UnfmgQEOqGrezDnC02DOUD9JBcU0VCfONwwo3KIwSwAsSrl29fIFAdGdWYD0FInzp5VWIlztjAhrhCyRDQYKGbDa04ACRgoMzMIgiZKCgFzy5vUCRoyBB2/QUFAAgkIZvYgTQ2FwBavix5CbBAEAIfkECQkAGgAsAAAAAGQADQCEBAIEhIKE1NLUREJE7O7s3N7cbG5sLC4spKKkDA4M/Pr8fHp8jI6M3Nrc5ObkBAYEhIaE1NbUREZE9Pb05OLkdHJ0pKakFBYU/P78fH58////AAAAAAAAAAAAAAAAAAAABf6gJo5kaZ5oqq5s675wLM90bd8opphYgSAFTEmnEA4VRR7SSCIyR05l8jhtLksTxGCAmEARh8fjgGBiIhZL5HlOr5toNTv+htLnbrwcnh8pAg8AggE7GgIJgoIJAiMEDAELDAQkjpCSlI+Rk42Zl5wLGZ4ijqCiGqShm6MMpaoUF4kAFw4iBrGCBiMNARkZEA0ku6C/wZC+wLrGxMm8Acgiu83PGtEZzsXSurcAyAPbEpyWqqePqZi8ppXmnNbpDO3jjvCY8yKvsRcUtdu5IhgCP+r4A4hAoIZ/AdkQNIgQgQCFPx42ISgRCkUmCioEErSgkICNihhBuUKlkBUkUilMjqyy8ok/kiddZtmCQBUGMADGIFCJo6dPEwq8DGmQ8KfRo0iTKu0ZAgAh+QQJCQATACwAAAAAZAANAIQEAgSEgoTU0tTs6uxEQkScnpzk4uT09vR0dnQUFhTc2tz8/vx8fnwEBgSMjozU1tSkoqT8+vx8enz///8AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAF9+AkjmRpnmiqrmzrvnAsz3Rt3/ISnfqxmL1fKQiM+IrHoVFIIiqTzWXpACEQCoemAAIRMCeLbfcb5nq1ZrL4PCqP0e/2Wp0eRRiAPICxEw0cDAwOAyR/gYOFgIKEI4aLiYeMfoqIjZSSE46Vk5EjBgl6AAkGIwIBgQECJKaoqqWnDKmrsLKvrbO3trGuIqy7uL8iCqF5D5adxwGbmYDKmIbOkI/H05zVzMjWm5+ho3J1cgVxImHibOQC5nTjYHNw5+3g6PIHCKEIfeQHUG1G+f0H/pHzB2SfQDAGCwZUeHBBQhIHCljBgqOixRoRDl7cyLGjx481QgAAOw=="/>',
                inputs: '',
                inputCapabilityListing: true,
                engines: [],
                patterns: [],
                normalizer: [],
                addChatEntryCallback: function(entryDiv, text, origin) {
                    entryDiv.addClass('appear');
                }
            }, options);

            botName = settings.botName;
            humanName = settings.humanName;
            thinkingHtml = settings.thinkingHtml;
            inputs = settings.inputs;
            inputCapabilityListing = settings.inputCapabilityListing;
            engines = settings.engines;
            patterns = settings.patterns;
            addChatEntryCallback = settings.addChatEntryCallback;
            normalizer = settings.normalizer;

            // update the command description
            updateCommandDescription();

            // input capability listing?
            if (inputCapabilityListing) {
                $(inputs).attr("list", "chatBotCommands");
            }

            // listen to inputs on the defined fields
            $(inputs).keyup(function (e) {
                if (e.keyCode == 13) {
                    ChatBot.addChatEntry($(this).val(), "human");
                    ChatBot.react($(this).val());
                }
                //console.log($(this).val());
            });

        },
        setBotName: function (name) {
            botName = name;
        },
        setHumanName: function (name) {
            humanName = name;
            $('.chatBotChatEntry.human .origin').html(name);
        },
        addChatEntry: function addChatEntry(text, origin) {
            if (text == undefined) {
                return;
            }
            if (text == '') {
                text = 'Sorry, I have no idea.';
            }
            var entryDiv = $('<div class="chatBotChatEntry ' + origin + '"></div>');
            entryDiv.html('<span class="origin">' + (origin == 'bot' ? botName : humanName) + '</span>' + text);
            $('#chatBotHistory').prepend(entryDiv);
            if (addChatEntryCallback != undefined) {
                addChatEntryCallback.call(this, entryDiv, text, origin);
            }
        },
        thinking: function (on) {
            var ti = $('#chatBotThinkingIndicator');
            if (on) {
                if (!sampleConversationRunning) {
                    $(inputs).attr('disabled', 'disabled');
                }
                ti.html(thinkingHtml);
            } else {
                if (!sampleConversationRunning) {
                    $(inputs).removeAttr('disabled');
                    $(inputs).val('');
                    $(inputs).focus();
                }
                ti.html('');
            }
        },
        react: function react(text) {
            this.thinking(true);

            // normalize the human text
            normalizer.map( method => {

                if(
                    String.prototype[ method ] instanceof Function
                ) {
                    // string immuable object
                    text = text[ method ]();
                } else if( method instanceof Function ) {
                    text = method( text ) || text;
                }

            } ) ;

            // check for custom patterns
            for (var i = 0; i < patterns.length; i++) {
                var pattern = patterns[i];
                var r = new RegExp(pattern.regexp, "i");
                var matches = text.match(r);
                //console.log(matches);
                if (matches) {
                    switch (pattern.actionKey) {
                        case 'rewrite':
                            text = pattern.actionValue;
                            for (var j = 1; j < matches.length; j++) {
                                text = text.replace("$" + j, matches[j]);
                            }
                            //console.log("rewritten to " + text);
                            if (pattern.callback != undefined) {
                                pattern.callback.call(this, matches);
                            }
                            break;
                        case 'response':
//                                var response = text.replace(r, pattern.actionValue);
                            var response = pattern.actionValue;
                            if (response != undefined) {
                                for (var j = 1; j < matches.length; j++) {
                                    response = response.replace("$" + j, matches[j]);
                                }
                                this.addChatEntry(response, "bot");
                            }
                            ChatBot.thinking(false);
                            if (pattern.callback != undefined) {
                                pattern.callback.call(this, matches);
                            }
                            return;
                    }
                    break;
                }
            }

            for (var e = 0; e < engines.length; e++) {
                var engine = engines[e];
                engine.react(text);
            }

        },
        playConversation: function (conversation, pauseLength) {

            if (pauseLength == undefined) {
                pauseLength = 3000;
            }

            if (sampleConversationRunning) {
                return false;
            }

            $(inputs).val('');

            sampleConversationRunning = true;

            var state = {
                start: 0,
                conversationArrayIndex: 0,
                conversationArray: conversation,
                currentInput: conversation[0]
            };

            playConversation(state, pauseLength);

            return true;
        },
        addPatternObject: function (obj) {
            patterns.push(obj);
            updateCommandDescription();
        },
        addPattern: function (regexp, actionKey, actionValue, callback, description) {
            var obj = {
                regexp: regexp,
                actionKey: actionKey,
                actionValue: actionValue,
                description: description,
                callback: callback
            };
            this.addPatternObject(obj);
        }

    }
}();