/**
 * @author stjaenicke
 */
function DynamicTable(core, dataSet, index){

    this.core = core;
    this.dataSet = dataSet;
    this.chunks = [];
    this.index = index;
    this.tableDiv;
    this.tableHeader;
    this.tableBody;
    this.tableFooter;
    this.chunkSelect;
    this.actualChunk;
    this.rows;
    
    this.initialize();
    
}

DynamicTable.prototype = {

    initialize: function(){
    
        this.chunks.push([]);
        for (var i = 0; i < this.dataSet.objects.length; i++) {
            if (this.chunks[this.chunks.length - 1].length == tableElements) 
                this.chunks.push([]);
            this.chunks[this.chunks.length - 1].push(this.dataSet.objects[i]);
        }
        this.rows = [];
        
        var base = this;
        
        this.tableDiv = document.createElement("div");
        this.tableDiv.id = "dataTable";
        
        var table = document.createElement("table");
        table.onselectstart = function(){
            return false;
        };
        this.tableDiv.appendChild(table);
        
        // Initialisation of the table header
        
        this.tableHeader = document.createElement("thead");
        var headerRow = document.createElement("tr");
        this.tableHeader.appendChild(headerRow);
        var visibilityLink = document.createElement("a");
        visibilityLink.id = "visibilityLink" + this.index;
        if (this.dataSet.hidden) 
            visibilityLink.innerHTML = "show";
        else 
            visibilityLink.innerHTML = "hide";
        visibilityLink.onclick = function(){
            if (base.core.changeVisibilityStatus(base.index)) 
                document.getElementById("visibilityLink" + base.index).innerHTML = "show";
            else 
                document.getElementById("visibilityLink" + base.index).innerHTML = "hide";
        }
        
        var cell1 = document.createElement("th");
        cell1.appendChild(visibilityLink);
        headerRow.appendChild(cell1);
        
        var thead = document.createElement("th");
        if (this.dataSet.type == 0) 
            thead.innerHTML = "Hits for: \"" + this.dataSet.termIdentifier + "\"";
        else 
            if (this.dataSet.type == 1) 
                thead.innerHTML = "Individual Data";
        headerRow.appendChild(thead);

		var colorBox = document.createElement("th");
		var canvas = document.createElement("canvas");
		canvas.width = 15;
		canvas.height = 15;
        if (!canvas.getContext && G_vmlCanvasManager) 
            canvas = G_vmlCanvasManager.initElement(canvas);		
		var ctx = canvas.getContext("2d");
 		ctx.fillStyle = 'rgb(' + colors[this.index].rt + ',' + colors[this.index].gt + ',' + colors[this.index].bt + ')';
 		ctx.fillRect (0, 0, 15, 15);
		colorBox.appendChild(canvas);
		headerRow.appendChild(colorBox);		
        
        var deleteLink = document.createElement("a");
        deleteLink.innerHTML = "delete";
        deleteLink.onclick = function(){
            base.core.deleteSearch(base.index);
        }
        var cell2 = document.createElement("th");
        cell2.appendChild(deleteLink);
        headerRow.appendChild(cell2);
        
        table.appendChild(this.tableHeader);
        
        
        // Initialisation of the table footer
        
        this.tableBody = document.createElement("tbody");
        table.appendChild(this.tableBody);
        
        
        // Initialisation of the table footer
        
        this.tableFooter = document.createElement("tfoot");
        var footerRow = document.createElement("tr");
        this.tableFooter.appendChild(footerRow);
        
        var previousLink = document.createElement("a");
        previousLink.innerHTML = "<<<";
        previousLink.onclick = function(){
            if (base.actualChunk > 0) {
                base.chunkSelect.value = base.actualChunk;
                base.createTableBody();
            }
        }        
        var nextLink = document.createElement("a");
        nextLink.innerHTML = ">>>";
        nextLink.onclick = function(){
            if (base.actualChunk + 1 < base.chunks.length) {
                base.chunkSelect.value = base.actualChunk + 2;
                base.createTableBody();
            }
        }
        var tfoot = document.createElement("th");
        tfoot.colSpan = "4";
        this.chunkSelect = document.createElement("input");
        this.chunkSelect.type = "text";
        this.chunkSelect.setAttribute( 'size', this.chunks.length.toString().length-1 );
        this.chunkSelect.setAttribute( 'maxlength', this.chunks.length.toString().length );
        this.chunkSelect.value = 1;
        this.chunkSelect.onkeypress = function handleEnter(event){
            var charCode;
            if (event && event.which) {
                charCode = event.which;
            }
            else 
                if (window.event) {
                    event = window.event;
                    charCode = event.keyCode;
                }
            if (charCode == 13) 
                base.createTableBody();
        }
        var maxChunks = document.createElement("label");
        maxChunks.innerHTML = "/" + this.chunks.length;
        tfoot.appendChild(previousLink);
        tfoot.appendChild(this.chunkSelect);
        tfoot.appendChild(maxChunks);
        tfoot.appendChild(nextLink);
        footerRow.appendChild(tfoot);
        
        table.appendChild(this.tableFooter);
        
        this.createTableBody();
        
    },
    
    createRow: function(object, index){
    
        var base = this;
        
        var dataRow = document.createElement("tr");
        
        var indexCell = document.createElement("td");
        indexCell.innerHTML = index + 1;
        dataRow.appendChild(indexCell);
        
        var objectCell = document.createElement("td");
        if (object.link != null) {
            var linkElement = document.createElement("a");
            linkElement.href = object.link;
            linkElement.target = "_blank";
            linkElement.innerHTML = object.name;
            objectCell.appendChild(linkElement);
        }
        else {
            objectCell.innerHTML = object.name;
        }
        dataRow.appendChild(objectCell);
        
        var placeCell = document.createElement("td");
        placeCell.innerHTML = object.place;
        dataRow.appendChild(placeCell);
        
        var timeCell = document.createElement("td");
        timeCell.innerHTML = base.core.getTimeString(object.time,object.granularity);
        dataRow.appendChild(timeCell);
        
        var mouseover = function(){
          	dataRow.lastColor = dataRow.style.backgroundColor;
           	dataRow.style.backgroundColor = "rgb(" + cellColor.ro + "," + cellColor.go + "," + cellColor.bo + ")";
			if( object.percentage != 1 ){
            	object.hoverSelect = true;
				base.core.timeplot.removePoles();
            	base.core.updateTimeAndMap();
			}
        }
        
        var mouseout = function(){	
            dataRow.style.backgroundColor = dataRow.lastColor;
            object.hoverSelect = false;
			base.core.timeplot.removePoles();
            base.core.updateTimeAndMap();
        }
        
        var mouseclick = function(){
            base.core.resetCore();
            object.hoverSelect = false;
            var c = colors[base.index];
            dataRow.style.background = 'rgb(' + c.rt + ',' + c.gt + ',' + c.bt + ')';
            dataRow.lastColor = dataRow.style.background;
            object.setPercentage(1);
			base.core.updateTimeAndMap();
        }
        
        if (document.addEventListener) {
            dataRow.addEventListener("mouseover", mouseover, false);
            dataRow.addEventListener("mouseout", mouseout, false);
            dataRow.addEventListener("click", mouseclick, false);
        }
        else 
            if (document.attachEvent) {
                dataRow.attachEvent("onmouseover", mouseover);
                dataRow.attachEvent("onmouseout", mouseout);
                dataRow.attachEvent("onclick", mouseclick);
            }
        
        if (index % 20 == 0) {
            indexCell.style.borderTop = "none";
            objectCell.style.borderTop = "none";
            placeCell.style.borderTop = "none";
            timeCell.style.borderTop = "none";
        }
        
        return dataRow;
        
    },
    
    createTableBody: function(){
        try {
            var selectedChunk = parseInt(this.chunkSelect.value);
            if (selectedChunk > this.chunks.length) {
                throw "Exception";
            }
            this.actualChunk = selectedChunk - 1;
        } 
        catch (exception) {
            this.chunkSelect.value = this.actualChunk + 1;
            return;
        }
        this.tableBody.innerHTML = "";
        this.rows = [];
        
        for (var i = 0; i < this.chunks[this.actualChunk].length; i++) {
            var index = this.actualChunk * tableElements + i;
            var row = this.createRow(this.chunks[this.actualChunk][i], index);
            this.tableBody.appendChild(row);
            this.rows.push(row);
        }
        this.update();
    },
    
    update: function(){
        for (var i = 0; i < this.chunks[this.actualChunk].length; i++) {
            var object = this.chunks[this.actualChunk][i];
            var p = object.percentage;
            if (object.hoverSelect) {
                p = 1;
            }
            var r = cellColor.r + Math.round(p * (colors[this.index].rt - cellColor.r));
            var g = cellColor.g + Math.round(p * (colors[this.index].gt - cellColor.g));
            var b = cellColor.b + Math.round(p * (colors[this.index].bt - cellColor.b));
            this.rows[i].style.background = 'rgb(' + r + ',' + g + ',' + b + ')';
        }
    }
    
}