// ==UserScript==
// @name         wolfram_alpha_reddit_robin_bot
// @version      2.0
// @namespace    http://moustacheminer.com/dev/alphabot/
// @description  A bot that automatically answers Wolfram Alpha questions.
// @author       lepon01
// @match        https://www.reddit.com/robin*
// @grant        GM_xmlhttpRequest
// @require      http://code.jquery.com/jquery-latest.js
// @downloadURL  http://moustacheminer.com/dev/alphabot/alphabot.js
// @updateURL    http://moustacheminer.com/dev/alphabot/alphabot.js
// ==/UserScript==

var wolframID = "2AURT4-KJG4J3QP3E";

(function() {
    'use strict';
    var websocket;
    var wsUri = r.config.robin_websocket_url;

    websocket = new WebSocket(wsUri);
    websocket.onmessage = function(evt) {onMessage(evt); };

    setTimeout(function() {
        //sendMessage("I am a bot, send a message beginning with >> ? << to ask WolframAlpha a question! https://redd.it/4d7nmc");
    }, 2000);

    function makeString(object) {
        if (object === null) return '';
        return String(object);
    }
    function truncate(str, length, truncateStr) {
        str = makeString(str);
        truncateStr = truncateStr || '...';
        length = ~~length;
        return str.length > length ? str.slice(0, length) + truncateStr : str;
    }

    function onMessage(evt){
        //recieved a message
        var jsonObject = JSON.parse(evt.data);
        if (jsonObject.type == "chat") {
            //recieved message is a chat message, compare contents
            if( jsonObject.payload.body.toLowerCase().startsWith("?") ) {
                var msg = jsonObject.payload.body.toLowerCase();
                wolfram(msg);
                console.log("Wolfram Function Executed");
            }
        }
    }

    function sendMessage(message) {
        $("#robinSendMessage > input[type='text']").val("");
        $("#robinSendMessage > input[type='text']").val(message);
        $("#robinSendMessage > input[type='submit']").click();
    }

    function wolfram(message) {
        var input = "http://api.wolframalpha.com/v2/query?appid="+wolframID+"&input="+encodeURIComponent(message.substring(1))+"&format=plaintext";
        console.log("Wolfram URL: " + input);

        GM_xmlhttpRequest ({
            method: 'GET',
            url: input,
            onload: function (responseDetails) {
                var xml = $.parseXML(responseDetails.response),
                    $xml = $(xml),
                    $didyoumean = $xml.find('didyoumean'),
                    $input = $xml.find('pod:nth-child(1)').find('plaintext'),
                    $result = $xml.find('pod:nth-child(2)').find('plaintext');
                var didyoumean = $didyoumean.text();
                var result = $result.text();
                var input = $input.text();
                var output;

                console.log(xml);

                if (result.length > 125) {
                    output = truncate(result,120) + "...";
                } else {
                    output = result;
                }

                if ( didyoumean !== "" ) {
                    var separator = didyoumean.replace(/\n/g, " | ");
                    output = "Did you mean: " + separator;
                }

                if ( input.includes("geoIP") || input.includes("lepon01") || input.includes("nearest location")) {
                    output = "This command is blocked.";
                }

                console.log(didyoumean);
                console.log(output);
                sendMessage("/me Wolfram: " + output);
            }
        });
    }
})();