/*
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

var sankoreLang = {
    display: "Afficher", 
    edit: "Modifier", 
    add: "Ajouter", 
    enter_data: "Saisir la donnée:", 
    enter_result: "Saisir le résultat:", 
    ok: "Ok", 
    cancel: "Annuler",
    wgt_name: "Contraste",
    reload: "Recharger",
    slate: "ardoise",
    pad: "tablette",
    none: "aucun",
    help: "Aide",
    help_content: "<p><h2>Contraste</h2></p>"+
"<p><h3>Jeu de couleurs.</h3></p>"+


"<p>Cette activité permet de masquer et d’afficher du texte en jouant sur la couleur de fond (jaune ou noir). Le but est de pouvoir faire apparaître des données en passant d’une couleur à l’autre.</p>"+

"<p>Le bouton “Recharger” réinitialise les exercices.</p>"+

"<p>Le bouton “Modifier” vous permet :</p>"+
"<ul><li>de choisir le thème de l’interactivité : tablette, ardoise ou aucun (par défaut aucun),</li>"+
"<li>de modifier un exercice ou d’en créer de nouveaux dans la même activité.</li></ul>"+

"<p>En mode édition, pour créer un nouvel exercice, cliquez sur “+ Ajouter” en haut, puis</p>"+
"<ul><li>saisissez la donnée par exemple “3x15”,</li>"+
"<li>saisissez le résultat, par exemple “15” et cliquez sur “OK”.</li></ul>"+
"<p>Pour modifier les données ou les résultats, cliquez directement sur l’exercice.</p>"+
"<p>Pour supprimer un exercice, cliquez sur la croix en haut à droite de l’exercice.</p>"+

"<p>Le bouton “Afficher” vous permet d’utiliser l’activité.</p>"
};

function init(){

    //variables
    var toggleFlag = false; // detects toggling in toggle button
    var endFlag = false; // ending of toggling in toggle button
    var addToggleStart = false; // detects toggling in add button
    var addToggleEnd = false; // ending of toggling in add button
    var shadowOver = false;
    var mode = false;
    var popupFlag = false
    var flagForSelect = false;
    var dragElement = null; //the element that must be dragging
    var lang = ""; //locale language
    var coords = {
        left:0,
        top:0
    }

    var resizeObj = {
        y:false,
        x:false,
        width:0,
        height:0
    }
    
    var opacityChanged = false;
    
    $("#wgt_display").text(sankoreLang.display);
    $("#wgt_edit").text(sankoreLang.edit);
    $("#wgt_add").text(sankoreLang.add);
    $("#wgt_name").text(sankoreLang.wgt_name);
    $("#wgt_reload").text(sankoreLang.reload);
    $("#wgt_help").text(sankoreLang.help);
    $("#help").html(sankoreLang.help_content);
    $(".style_select option[value='1']").text(sankoreLang.slate);
    $(".style_select option[value='2']").text(sankoreLang.pad);
    $(".style_select option[value='3']").text(sankoreLang.none);
    
    if(window.sankore){
        if(sankore.preference("blackYellowData","")){
            var importArray = jQuery.parseJSON(sankore.preference("blackYellowData",""));
            for(var i in importArray){
                var tmpReadyTask = $("<div class='readyTask'>");
                var exprContainer = $("<div class='taskContainer' style='color: yellow;'>" + importArray[i].data1 + "</div>").appendTo(tmpReadyTask);
                var resContainer = $("<div class='taskContainer' style='color: black;'>"+ importArray[i].data2 + "</div>").appendTo(tmpReadyTask);
                tmpReadyTask.width(importArray[i].width)
                .height(importArray[i].height)
                .css("position","absolute")
                .css("top",importArray[i].top)
                .css("left",importArray[i].left);                                
                tmpReadyTask.appendTo("#data");
            }      
        }
        $(document).disableTextSelect();
    }
    
    /* ------------- BUTTONS -------------*/
    
    if(window.sankore){
        if(sankore.preference("by_style","")){
            changeStyle(sankore.preference("by_style",""));
            $(".style_select").val(sankore.preference("by_style",""));
        } else
            changeStyle("3")
    } else
        changeStyle("3")

    $("#wgt_display, #wgt_edit").click(function(event){
        if(this.id == "wgt_display"){
            if(!$(this).hasClass("selected")){                
                $(this).addClass("selected");
                $("#wgt_edit").removeClass("selected");
                $(".style_select").css("display","none");                
                $(this).css("display", "none");
                $("#wgt_add").css("display", "none");
                $("#wgt_edit").css("display", "block");
                mode = false;
                $(".leftDiv, .rightDiv").animate({
                    "opacity":"1"
                },"fast",function(){
                    if(opacityChanged){
                        if($(".editContainer").size() != 0){
                            $(".editContainer").each(function(index, domElem){
                                var tmpReadyTask = $(domElem).find(".readyTask");
                                tmpReadyTask.width($(domElem).width())
                                .height($(domElem).height())
                                .css("position","absolute")
                                .css("top",$(domElem).position().top)
                                .css("left",$(domElem).position().left)
                                .find(".taskContainer").removeAttr("contenteditable");                                
                                
                                $(domElem).remove();
                                tmpReadyTask.appendTo("#data");
                            });
                        }
                        opacityChanged = false;
                    }
                });
                $(document).disableTextSelect(); 
            }
        } else {            
            if(!$(this).hasClass("selected")){
                $(this).addClass("selected");
                $("#wgt_display").removeClass("selected");
                $(".style_select").css("display","block");                
                $(this).css("display", "none");
                $("#wgt_add").css("display", "block");
                $("#wgt_display").css("display", "block");
                mode = true; 
                $(document).enableTextSelect(); 
                $(".leftDiv, .rightDiv").animate({
                    "opacity":"0.4"
                },"fast",function(){
                    if(!opacityChanged){
                        if($(".readyTask").size() != 0){
                            var tmp_arr = [];
                            $(".readyTask").each(function(){
                                tmp_arr.push($(this));
                            })
                            orderItems(tmp_arr);
                            $(".readyTask").each(function(index, domElem){     
                                var editContent = $("<div class='editContainer'>").width($(domElem).width() + 10).height($(domElem) + 10).appendTo("#data");
                                var closeItem = $("<div class='closeItem'>").appendTo(editContent);
                                editContent.css("top", $(domElem).position().top).css("left", $(domElem).position().left);
                                $(domElem).css("position","static")
                                .width("100%")
                                .height("100%")
                                .find(".taskContainer").attr("contenteditable", "true");
                                $(domElem).appendTo(editContent);
                            });
                        }
                        opacityChanged = true;
                    }
                });
            }
        }
    });

    $("#wgt_help").click(function(){
        var tmp = $(this);
        if($(this).hasClass("open")){
            $("#help").slideUp("100", function(){
                tmp.removeClass("open");
                $("#data").show();
            });
        } else {            
            $("#data").hide();
            $("#help").slideDown("100", function(){
                tmp.addClass("open");
            });
        }
    });

    $("#wgt_reload").click(function(){
        reloadItems();
    });
    
    $("#wgt_add").click(function(){
        if($("#wgt_help").hasClass("open")){
            $("#help").slideUp("100", function(){
                $("#wgt_help").removeClass("open");
                $("#data").show();
            });
        }
        shadowDiv.show();
        shadowOver = true;
        popupBack.show("slow");        
        $(document).disableTextSelect();
    });
    
    $(".style_select option[value='1']").text(sankoreLang.slate);
    $(".style_select option[value='2']").text(sankoreLang.pad);
    
    $(".style_select").change(function (event){
        changeStyle($(this).find("option:selected").val());
    })
    
    /* -------------- END OF WORK WITH BUTTONS ---------------*/
    
    //basic divs
    var leftDiv = $("<div id='leftDiv' class='leftDiv'>").appendTo("#data");
    var rightDiv = $("<div id='rightDiv' class='rightDiv'>").appendTo("#data");
    
    //divs for adding a new item
    var shadowDiv = $("<div id='shadowDiv' class='shadowDiv'>").appendTo("html");
    var popupBack = $("<div id='popupBack' class='popupBack'>").appendTo("#data");
    
    //input fields and buttons for a popup window
    var expressionDiv = $("<div id='expressionDiv' class='popupContainers'>").appendTo(popupBack);
    var experssionLabel = $("<span id='experssionLabel' class='popupLabels'><b>" + sankoreLang.enter_data + "</b></span>").appendTo(expressionDiv);
    var expresionText = $("<input type='text' id='expresionText' class='expresionInput'/>").appendTo(expressionDiv);
    
    var resultDiv = $("<div id='resultDiv' class='popupContainers'>").appendTo(popupBack);
    var resultLabel = $("<span id='resultLabel' class='popupLabels'><b>" + sankoreLang.enter_result + "</b></span>").appendTo(resultDiv);
    var resultText = $("<input type='text' id='resultText' class='expresionInput'/>").appendTo(resultDiv);
    
    var popupButtonsDiv= $("<div id='popupButtonsDiv' class='popupContainers'>").appendTo(popupBack);
    var cancelButton = $("<input type='button' id='cancelButton' class='popupButtons' value='" + sankoreLang.cancel + "'/>").appendTo(popupButtonsDiv);
    var okButton = $("<input type='button' id='okButton' class='popupButtons' value='" + sankoreLang.ok + "'/>").appendTo(popupButtonsDiv);
    
    /* -------------- A WORK WITH POPUP BUTTONS AND FIELDS ---------------*/
    
    $("#resultText, #expresionText").keyup(function(){
        if($(this).val()){
            $(this).css("background-color", "#ff9");
        }
    });
    
    cancelButton.click(function(){
        popupBack.hide("slow", function(){
            $("#resultText, #expresionText").val("")
            .css("background-color", "#ffc");
            shadowDiv.hide();
            shadowOver = false; 
            $(document).enableTextSelect();
        });        
    });
    
    okButton.click(function(){
        if(checkEmptyFields(expresionText) && checkEmptyFields(resultText)){
            popupBack.hide("slow", function(){
                shadowDiv.hide();
                shadowOver = false;
                addTask(expresionText.val(), resultText.val());
                exportToSankore();
                $("#resultText, #expresionText").val("")
                .css("background-color", "#ffc");
                $(document).enableTextSelect();
            })
        }
    });
    
    /* -------------- THE END OF WORK WITH POPUP BUTTONS AND FIELDS ---------------*/    
    
    // a work with dragging possibility    
    $("input:text").mouseover(function(){
        $(document).enableTextSelect(); 
    });
                        
    $("input:text").mouseout(function(){
        $(document).disableTextSelect(); 
    });
                    
    $(".readyTask, .editContainer").live("mousedown",function(event){
        if($("#wgt_display").hasClass("selected")){
            if(!shadowOver){
                dragElement = $(this);
                coords.left = event.pageX - $(this).position().left;
                coords.top = event.pageY - $(this).position().top;
                resizeObj.width = $(this).width();
                resizeObj.height = $(this).height();
            }
            $(document).disableTextSelect();
        }
    });
    
    $("body").mouseup(function(event){
        if($("#wgt_display").hasClass("selected")){
            if(!shadowOver){
                if (dragElement) {
                    exportToSankore();
                }
                dragElement = null;
                resizeObj.x = false;
                resizeObj.y = false;
            }
        }
    });
    
    $("body").mousemove(function(event){
        if(dragElement && !shadowOver && $("#wgt_display").hasClass("selected")){ 
            var top = event.pageY - coords.top;
            var left = event.pageX - coords.left;
            var bottom = top + dragElement.height();
            var right = left + dragElement.width();            
            if(resizeObj.x){
                if(right < ($(window).width() - 54))
                    dragElement.width(event.pageX - dragElement.position().left);
            }
            else if(resizeObj.y){   
                if(bottom < ($(window).height() - 54))
                    dragElement.height(event.pageY - dragElement.position().top);
            }
            else {
                if((top > 54) && (bottom < ($(window).height() - 54)))
                    dragElement.css("top",event.pageY - coords.top);
                if((left >= 54) && (right < ($(window).width() - 54))) 
                    dragElement.css("left", event.pageX - coords.left);
            }
        }
    });
    
    //closing item
    $(".closeItem").live("click", function(){
        if(!shadowOver){
            $(this).parent().remove();
            if($(".editContainer").size() > 0){            
                var prev = $(".editContainer:first");
                if((prev.position().left == 54) && (prev.position().top != 60))
                    prev.css("top", "60px");  
                var prevBottom = prev.position().top + prev.height(),
                prevLeft = prev.position().left;
                if(prev.next().length)
                    recursionCall(prevBottom, prevLeft, prev.next());
            }
        }
    });
    
    $(".taskContainer").live("keyup", function(){
        if($(".editContainer").size() > 1){            
            var prev = $(".editContainer:first"),
            prevBottom = prev.position().top + prev.height(),
            prevLeft = prev.position().left;
            recursionCall(prevBottom, prevLeft, prev.next());
        }
    })
    
    function recursionCall(prevBottom, prevLeft, curr){
        var curHeight = curr.height(),
        curLeft = curr.position().left;
        if(prevLeft == curLeft){
            if((prevBottom + 15 + curHeight) < ($(window).height() - 54))
                curr.css("top", prevBottom + 15 + "px");                        
            else
                curr.css("top", "60px").css("left", prevLeft + 255 + "px");            
        } else {
            if((prevBottom + 15 + curHeight) < ($(window).height() - 54))
                curr.css("top", prevBottom + 15 + "px").css("left", prevLeft + "px");           
            else
                curr.css("top", "60px").css("left", prevLeft + 255 + "px");
        }
        prevBottom = curr.position().top + curr.height(),
        prevLeft = curr.position().left;
        if(curr.next().length)
            recursionCall(prevBottom, prevLeft, curr.next());
    }     
    
    //$("#leftDiv,#rightDiv,#shadowDiv").css("height", $(window).height());
    popupBack.css("top", ($(window).height() - 138)*50/$(window).height() + "%");
    popupBack.css("left", ($(window).width() - 360)*50/$(window).width() + "%");
    
    $(window).resize(function(){
        if($("#wgt_edit").hasClass("selected")){
            if($(".editContainer").size() > 1){            
                var prev = $(".editContainer:first"),
                prevBottom = prev.position().top + prev.height(),
                prevLeft = prev.position().left;
                recursionCall(prevBottom, prevLeft, prev.next());
            }
        } else {
            var tmp_array = [];
            $(".readyTask").each(function(){
                tmp_array.push($(this));
            });
            orderItems(tmp_array);
        }
        popupBack.css("top", ($(window).height() - 138)*50/$(window).height() + "%");
        popupBack.css("left", ($(window).width() - 360)*50/$(window).width() + "%");
    });
    
    if (window.widget) {
        window.widget.onleave = function(){
            exportToSankore();
            sankore.setPreference("by_style", $(".style_select").find("option:selected").val());
        }
    }
    
    // export data
    function exportToSankore(){        
               
        var arrayToExport = new Array();        
        if(mode){            
            if($(".editContainer").size() != 0){
                $(".editContainer").each(function(index, domElem){
                    var objToExport = {
                        data1:"",
                        data2:"",
                        width:0,
                        height:0,
                        top:0,
                        left:0
                    } 
                    objToExport.data1 = $(domElem).find(".readyTask").find(":first-child").text();
                    objToExport.data2 = $(domElem).find(".readyTask").find(":last-child").text();
                    objToExport.width = $(domElem).width();
                    objToExport.height = $(domElem).height();
                    objToExport.top = $(domElem).position().top;
                    objToExport.left = $(domElem).position().left;
                    arrayToExport.push(objToExport);
                });
            }
        } else {      
            if($(".readyTask").size() != 0){
                $(".readyTask").each(function(index, domElem){
                    var objToExport = {
                        data1:"",
                        data2:"",
                        width:0,
                        height:0,
                        top:0,
                        left:0
                    } 
                    objToExport.data1 = $(domElem).find(":first-child").text();
                    objToExport.data2 = $(domElem).find(":last-child").text();
                    objToExport.width = $(domElem).width();
                    objToExport.height = $(domElem).height();
                    objToExport.top = $(domElem).position().top;
                    objToExport.left = $(domElem).position().left;
                    arrayToExport.push(objToExport);
                });
            }              
        }
        if(window.sankore)
            sankore.setPreference("blackYellowData", JSON.stringify(arrayToExport));
    }
}

//checking empty fields
function checkEmptyFields(field){
    if(field.val() == ""){
        field.css("background-color", "red");
        return false;
    } else {
        field.css("background-color", "#ff9");
        return true;
    }
}

//reload
function reloadItems(){
    if($("#wgt_edit").hasClass("selected"))
        $("#wgt_display").trigger("click");
    else{
        var tmp_array = [];
        $(".readyTask").each(function(){
            tmp_array.push($(this));
        });
        tmp_array = shuffle(tmp_array);
        orderItems(tmp_array);
    }    
        
}

//order items
function orderItems(items){
    var bottom = 45,
    lastItemLeft = 54; 
    for (var i in items){
        if((bottom + items[i].height()) < ($(window).height() - 54)){
            items[i].css("top", bottom + 15 + "px").css("left", lastItemLeft + "px").appendTo("#data");
            bottom += items[i].height() + 15;
        } else {
            bottom = 60;
            lastItemLeft += 255;
            items[i].css("top", bottom + "px").css("left", lastItemLeft + "px").appendTo("#data");
            bottom += items[i].height();
        }
    }        
}

//shuffles an array
function shuffle( arr )
{
    var pos, tmp;	
    for( var i = 0; i < arr.length; i++ )
    {
        pos = Math.round( Math.random() * ( arr.length - 1 ) );
        tmp = arr[pos];
        arr[pos] = arr[i];
        arr[i] = tmp;
    }
    return arr;
}

//adding a new task to the page
function addTask(expression, result){
    var lastItem = $(".editContainer:last"),
    lastItemPos = lastItem.length ? lastItem.position().top : 45,
    lastItemHeight = lastItem.length ? lastItem.height() : 0,
    lastItemLeft = lastItem.length ? lastItem.position().left : 54;
    var bottom = lastItemPos + lastItemHeight + 85;
    var editContent = $("<div class='editContainer'>");
    $("<div class='closeItem'>").appendTo(editContent);
    var main = $("<div class='readyTask'>");
    $("<div class='taskContainer' style='color: yellow;' contenteditable='true'>" + expression + "</div>").appendTo(main);
    $("<div class='taskContainer' style='color: black;' contenteditable='true'>"+ result + "</div>").appendTo(main);
    if(bottom < ($(window).height() - 54)){
        editContent.css("top", lastItemPos + lastItemHeight + 15 + "px").css("left", lastItemLeft + "px").appendTo("#data");
    } else {
        lastItemPos = 45;
        editContent.css("top", lastItemPos + 15 + "px").css("left", lastItemLeft + 255 + "px").appendTo("#data");
    }    
    main.appendTo(editContent);
}

//changing the style
function changeStyle(val){
    switch(val){
        case "1":
            $(".b_top_left").removeClass("btl_pad").removeClass("without_back");
            $(".b_top_center").removeClass("btc_pad").removeClass("without_back");
            $(".b_top_right").removeClass("btr_pad").removeClass("without_back");
            $(".b_center_left").removeClass("bcl_pad").removeClass("without_back");
            $(".b_center_right").removeClass("bcr_pad").removeClass("without_back");
            $(".b_bottom_right").removeClass("bbr_pad").removeClass("without_back");
            $(".b_bottom_left").removeClass("bbl_pad").removeClass("without_back");
            $(".b_bottom_center").removeClass("bbc_pad").removeClass("without_back");
            $("#wgt_reload").removeClass("pad_color").removeClass("pad_reload");
            $("#wgt_edit").removeClass("pad_color").removeClass("pad_edit");
            $("#wgt_help").removeClass("pad_color").removeClass("pad_help");
            $("#wgt_display").removeClass("pad_color").removeClass("pad_edit");
            $("#wgt_add").removeClass("pad_color").removeClass("pad_add");
            $("#wgt_name").removeClass("pad_color");
            $(".style_select").removeClass("pad_select").removeClass("none_select").val(val);
            $("body, html").removeClass("without_radius");
            break;
        case "2":
            $(".b_top_left").addClass("btl_pad").removeClass("without_back");
            $(".b_top_center").addClass("btc_pad").removeClass("without_back");
            $(".b_top_right").addClass("btr_pad").removeClass("without_back");
            $(".b_center_left").addClass("bcl_pad").removeClass("without_back");
            $(".b_center_right").addClass("bcr_pad").removeClass("without_back");
            $(".b_bottom_right").addClass("bbr_pad").removeClass("without_back");
            $(".b_bottom_left").addClass("bbl_pad").removeClass("without_back");
            $(".b_bottom_center").addClass("bbc_pad").removeClass("without_back");
            $("#wgt_reload").addClass("pad_color").addClass("pad_reload");
            $("#wgt_edit").addClass("pad_color").addClass("pad_edit");
            $("#wgt_help").addClass("pad_color").addClass("pad_help");
            $("#wgt_display").addClass("pad_color").addClass("pad_edit");
            $("#wgt_add").addClass("pad_color").addClass("pad_add");
            $("#wgt_name").addClass("pad_color");
            $(".style_select").addClass("pad_select").removeClass("none_select").val(val);
            $("body, html").removeClass("without_radius");
            break;
        case "3":
            $(".b_top_left").addClass("without_back").removeClass("btl_pad");
            $(".b_top_center").addClass("without_back").removeClass("btc_pad");
            $(".b_top_right").addClass("without_back").removeClass("btr_pad");
            $(".b_center_left").addClass("without_back").removeClass("bcl_pad");
            $(".b_center_right").addClass("without_back").removeClass("bcr_pad");
            $(".b_bottom_right").addClass("without_back").removeClass("bbr_pad");
            $(".b_bottom_left").addClass("without_back").removeClass("bbl_pad");
            $(".b_bottom_center").addClass("without_back").removeClass("bbc_pad");
            $("#wgt_reload").addClass("pad_color").addClass("pad_reload");
            $("#wgt_edit").addClass("pad_color").addClass("pad_edit");
            $("#wgt_help").addClass("pad_color").addClass("pad_help");
            $("#wgt_display").addClass("pad_color").addClass("pad_edit");
            $("#wgt_add").addClass("pad_color").addClass("pad_add");
            $("#wgt_name").addClass("pad_color");
            $(".style_select").addClass("none_select").val(val);
            $("body, html").addClass("without_radius");
            break;
    }
    if($("#wgt_edit").hasClass("selected"))
        $(document).enableTextSelect(); 
}