// ==UserScript==
// @name         9gag tagger
// @namespace    http://9gag.com
// @include      http://9gag.com/*
// @version      0.1
// @description  Tag all the people!
// @author       flufflz
// @require     http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js
// @grant       GM_addStyle
// @grant       GM_getValue
// @grant       GM_setValue
// @downloadURL none
// ==/UserScript==

(function() {
    'use strict';
    var savedSettings = getSavedValues("tagList");
    // If no delete button exists it's not our post. Maybe we should allow it for other posts though?
    if(document.getElementsByClassName("badge-item-delete hide")[0])
        return;

    var oPostButton, newElement, oPopup, aNames, oTextBox, oSubmitButton, iCommentsPresent, iCommentsPosted, iFailedAttempts, sNextNames;
    oPopup = '                                                              \
                <div id="gmPopupContainer">                                                   \
                    <form>                                                                    \
                        <input type="text" placeholder="Insert all names you wish to tag here. Separate them by an empty space. Example: flufflz name2 name3 name4" id="gmTextBox"> \
                                                                                              \
                        <p id="myNumberSum">&nbsp;</p>                                        \
                        <button id="gmStartTagBtn" type="button">Start tagging</button>  \
                        <button id="gmCloseDlgBtn" type="button">Cancel</button>         \
                    </form>                                                                   \
                </div>                                                                        \
            ';
    oPostButton = document.getElementsByClassName("cmnt-btn size-30 submit-comment badge-post-trigger")[0];
    if (oPostButton) {
        newElement = oPostButton.cloneNode(true);
        newElement.id = "tag_button";
        newElement.text = "Tag";
        newElement.onclick = function()
        {
            if(document.getElementById("gmPopupContainer"))
            {
                $("#gmPopupContainer").show();
                return;
            }

            $("body").append ( oPopup );

            if(savedSettings)
               document.getElementById("gmTextBox").value = savedSettings;

            //--- Use jQuery to activate the dialog buttons.
            $("#gmStartTagBtn").click ( function () {
                $("#gmPopupContainer").hide();
                var sNames = document.getElementById("gmTextBox").value.replace(/ +(?= )/g,'');
                saveValues(sNames);
                setTimeout(function() {
                    startTagging(sNames);
                }, 500);
            } );

            $("#gmCloseDlgBtn").click ( function () {
                $("#gmPopupContainer").hide ();
            } );
        };
        oPostButton.parentNode.insertBefore(newElement, oPostButton.nextSibling);
    } else return;

    function startTagging(sNames) {
      // Actual name array. Replace my name with actual names and fill it as much as you like.
        aNames = [];
        aNames = sNames.split(" ");
        aNames = shuffle(aNames);

        // You don't need to touch anything down there. Just let it do it's magic.
        oTextBox = document.getElementsByClassName("post-text-area badge-post-textarea focus");
        oSubmitButton = document.getElementsByClassName("cmnt-btn size-30 submit-comment badge-post-trigger");
        iCommentsPresent = document.getElementsByClassName("comment-entry badge-comment").length;
        iCommentsPosted = 0;

        iFailedAttempts = 0;

        createNewPost();
    }

    // We might trigger a spam filter if we use the same pattern every single time
    function shuffle(array) {
        var currentIndex = array.length, temporaryValue, randomIndex;

        // While there remain elements to shuffle...
        while (0 !== currentIndex) {

            // Pick a remaining element...
            randomIndex = Math.floor(Math.random() * currentIndex);
            currentIndex -= 1;

            // And swap it with the current element.
            temporaryValue = array[currentIndex];
            array[currentIndex] = array[randomIndex];
            array[randomIndex] = temporaryValue;
        }

        return array;
    }

    function createNewPost() {
        if(aNames.length > 0)
        {
            sNextNames = "@";
            for(var i = 0; i <= 2; ++i)
            {
                sNextNames = (sNextNames + aNames.pop());
                if(aNames.length === 0 || i === 2)
                    break;
                sNextNames = (sNextNames + "\n" + " @");
            }

            oTextBox[0].value = sNextNames;
            setTimeout(function() {
                oSubmitButton[0].click();
            }, 100);
            ++iCommentsPosted;
            setTimeout(function() {
                checkComments();
            }, 500);
        }
    }

    function waitSomeMore() {
        setTimeout(function() {
            checkComments();
        }, 500);
    }

    function checkComments() {
        setTimeout(function() {
            if(iFailedAttempts > 20)
                throw new Error("Waited too long for new comment to appear. We most likely lost track of it for some reason.");

            if(document.getElementsByClassName("comment-entry badge-comment").length === (iCommentsPresent + iCommentsPosted))
            {
                iFailedAttempts = 0;
                createNewPost();
            } else {
                ++iFailedAttempts;
                waitSomeMore();
            }
        }, 200);
    }

    function getSavedValues() {
        return GM_getValue("tagList");
    }

    function saveValues(values) {
        return GM_setValue("tagList", values);
    }

    GM_addStyle ( "                                                 \
    #gmPopupContainer {                                         \
        position:               fixed;                          \
        top:                    30%;                            \
        left:                   20%;                            \
        padding:                2em;                            \
        background:             powderblue;                     \
        border:                 3px double black;               \
        border-radius:          1ex;                            \
        z-index:                777;                            \
    }                                                           \
    #gmPopupContainer button{                                   \
        cursor:                 pointer;                        \
        margin:                 1em 1em 0;                      \
        border:                 1px outset buttonface;          \
    }                                                           \
" );
})();