/**
 * Global variables
 */
var origAttrs = new Object();	// Original image attributes
var defAttrs; 					// Definable image attributes

/**
 * Load images page
 * 
 * @return Nothing
 */
function loadImagesPage() {
	// Set padding for images page
	$('#imagesTab').css('padding', '20px 60px');
	
	// Get images within the database
	$.ajax( {
		url : 'lib/cmd.php',
		dataType : 'json',
		data : {
			cmd : 'lsdef',
			tgt : '',
			args : '-t;osimage;-l',
			msg : ''
		},

		success : loadImages
	});
}

/**
 * Load images within the database
 * 
 * @param data
 *            Data returned from HTTP request
 * @return Nothing
 */
function loadImages(data) {
	// Data returned
	var rsp = data.rsp;
	// Image attributes hash
	var attrs = new Object();
	// Image attributes
	var headers = new Object();
	
	// Clear cookie containing list of images where their attributes 
	// need to be updated
	$.cookie('images2update', '');
	// Clear hash table containing image attributes
	origAttrs = '';

	var image;
	var args;
	for (var i in rsp) {
		// Get the image
		var pos = rsp[i].indexOf('Object name:');
		if (pos > -1) {
			var temp = rsp[i].split(': ');
			image = jQuery.trim(temp[1]);

			// Create a hash for the image attributes
			attrs[image] = new Object();
			i++;
		}

		// Get key and value
		args = rsp[i].split('=');
		var key = jQuery.trim(args[0]);
		var val = jQuery.trim(args[1]);

		// Create a hash table
		attrs[image][key] = val;
		headers[key] = 1;
	}
	
	// Save attributes in hash table
	origAttrs = attrs;

	// Sort headers
	var sorted = new Array();
	for (var key in headers) {
		sorted.push(key);
	}
	sorted.sort();

	// Add column for check box and image name
	sorted.unshift('<input type="checkbox" onclick="selectAllCheckbox(event, $(this))">', 'imagename');

	// Create a datatable
	var dTable = new DataTable('imagesDataTable');
	dTable.init(sorted);

	// Go through each image
	for (var img in attrs) {
		// Create a row
		var row = new Array();
		// Create a check box
		var checkBx = '<input type="checkbox" name="' + img + '"/>';
		// Push in checkbox and image name
		row.push(checkBx, img);
		
		// Go through each header
		for (var i = 2; i < sorted.length; i++) {
			// Add the node attributes to the row
			var key = sorted[i];
			var val = attrs[img][key];
			if (val) {
				row.push(val);
			} else {
				row.push('');
			}
		}

		// Add the row to the table
		dTable.add(row);
	}

	// Clear the tab before inserting the table
	$('#imagesTab').children().remove();
	
	// Create info bar for images tab
	var info = createInfoBar('Click on a cell to edit.  Click outside the table to write to the cell.  Hit the Escape key to ignore changes. Once you are satisfied with how the table looks, click on Save.');
	$('#imagesTab').append(info);

	// Create action bar
	var actionBar = $('<div class="actionBar"></div>');

	/**
	 * The following actions are available for images:
	 * copy Linux distribution and edit image properties
	 */

	// Create copy Linux button
	var copyLinuxBtn = createButton('Copy Linux');
	copyLinuxBtn.bind('click', function(event) {
		loadCopyLinuxPage();
	});
	
	// Create edit button
	var editBtn = createButton('Edit');
	editBtn.bind('click', function(event){
		var tgtImages = getNodesChecked('imagesDataTable').split(',');
		for (var i in tgtImages) {
			 loadEditImagePage(tgtImages[i]);
		}
	});
	
	// Create save button
	var saveBtn = createButton('Save');
	// Do not show button until table is edited
	saveBtn.css({
		'display': 'inline',
		'margin-left': '550px'
	}).hide();
	saveBtn.bind('click', function(event){
		updateImageAttrs();
	});
	
	// Create undo button
	var undoBtn = createButton('Undo');
	// Do not show button until table is edited
	undoBtn.css({
		'display': 'inline'
	}).hide();
	undoBtn.bind('click', function(event){
		restoreImageAttrs();
	});
	
	/**
	 * Create an action bar
	 */
	var actionsBar = $('<div></div>').css('margin', '10px 0px');
	actionsBar.append(copyLinuxBtn);
	actionsBar.append(editBtn);
	actionsBar.append(saveBtn);
	actionsBar.append(undoBtn);
	$('#imagesTab').append(actionsBar);
	
	// Insert table
	$('#imagesTab').append(dTable.object());

	// Turn table into a datatable
	var myDataTable = $('#imagesDataTable').dataTable({
		'iDisplayLength': 50
	});
	
	// Set datatable width
	$('#imagesDataTable_wrapper').css({
		'width': '880px',
		'margin': '0px'
	});
	
	/**
	 * Enable editable columns
	 */
	// Do not make 1st, 2nd, 3rd, 4th, or 5th column editable
	$('#imagesDataTable td:not(td:nth-child(1),td:nth-child(2))').editable(
		function(value, settings) {	
			// Change text color to red
			$(this).css('color', 'red');
			
			// Get column index
			var colPos = this.cellIndex;
						
			// Get row index
			var dTable = $('#imagesDataTable').dataTable();
			var rowPos = dTable.fnGetPosition(this.parentNode);
			
			// Update datatable
			dTable.fnUpdate(value, rowPos, colPos);
			
			// Get image name
			var image = $(this).parent().find('td:eq(1)').text();
			
			// Flag image to update
			flagImage2Update(image);
			
			// Show table menu actions
			saveBtn.show();
			undoBtn.show();

			return (value);
		}, {
			onblur : 'submit', 	// Clicking outside editable area submits changes
			type : 'textarea',	// Input type to use
			placeholder: ' ',
			height : '30px' 	// The height of the text area
		});
		
	// Get definable node attributes
	$.ajax( {
		url : 'lib/cmd.php',
		dataType : 'json',
		data : {
			cmd : 'lsdef',
			tgt : '',
			args : '-t;osimage;-h',
			msg : ''
		},

		success : setImageDefAttrs
	});
}

/**
 * Flag the image in the table to update
 * 
 * @param image
 *            The image name
 * @return Nothing
 */
function flagImage2Update(image) {
	// Get list containing current images to update
	var images = $.cookie('images2update');

	// If the node is not in the list
	if (images.indexOf(image) == -1) {
		// Add the new node to list
		images += image + ';';
		$.cookie('images2update', images);
	}
}

/**
 * Update the image attributes
 * 
 * @return Nothing
 */
function updateImageAttrs() {
	// Get the nodes datatable
	var dTable = $('#imagesDataTable').dataTable();
	// Get all nodes within the datatable
	var rows = dTable.fnGetNodes();
	
	// Get table headers
	var headers = $('#imagesDataTable thead tr th');
							
	// Get list of nodes to update
	var imagesList = $.cookie('images2update');
	var images = imagesList.split(';');
		
	// Create the arguments
	var args;
	var rowPos, colPos, value;
	var attrName;
	// Go through each node where an attribute was changed
	for (var i in images) {
		if (images[i]) {
			args = '';
			
        	// Get the row containing the image name
        	rowPos = findRowIndexUsingCol(images[i], '#imagesDataTable', 1);
        	$(rows[rowPos]).find('td').each(function (){
        		if ($(this).css('color') == 'red') {
        			// Change color back to normal
        			$(this).css('color', '');
        			
        			// Get column position
        			colPos = $(this).parent().children().index($(this));
        			// Get column value
        			value = $(this).text();
        			
        			// Get attribute name
        			attrName = jQuery.trim(headers.eq(colPos).text());
        			
        			// Build argument string
        			if (args) {
        				// Handle subsequent arguments
        				args += ';' + attrName + '=' + value;
        			} else {
        				// Handle the 1st argument
        				args += attrName + '=' + value;
        			}		
        		}
        	});
        	
        	// Send command to change image attributes
        	$.ajax( {
        		url : 'lib/cmd.php',
        		dataType : 'json',
        		data : {
        			cmd : 'chdef',
        			tgt : '',
        			args : '-t;osimage;-o;' + images[i] + ';' + args,
        			msg : 'out=imagesTab;tgt=' + images[i]
        		},

        		success: showChdefOutput
        	});
		} // End of if
	} // End of for
	
	// Clear cookie containing list of images where
	// their attributes need to be updated
	$.cookie('images2update', '');
}

/**
 * Restore image attributes to their original content
 * 
 * @return Nothing
 */
function restoreImageAttrs() {
	// Get list of images to restore
	var imagesList = $.cookie('images2update');
	var images = imagesList.split(';');
	
	// Get the image datatable
	var dTable = $('#imagesDataTable').dataTable();
	// Get table headers
	var headers = $('#imagesDataTable thead tr th');
	// Get all nodes within the datatable
	var rows = dTable.fnGetNodes();
		
	// Go through each node where an attribute was changed
	var rowPos, colPos;
	var attrName, origVal;
	for (var i in images) {
		if (images[i]) {			
			// Get the row containing the image name
			rowPos = findRowIndexUsingCol(images[i], '#imagesDataTable', 1);
        	$(rows[rowPos]).find('td').each(function (){
        		if ($(this).css('color') == 'red') {
        			// Change color back to normal
        			$(this).css('color', '');
        			
        			// Get column position
        			colPos = $(this).parent().children().index($(this));	        			
        			// Get attribute name
        			attrName = jQuery.trim(headers.eq(colPos).text());
        			// Get original content
        			origVal = origAttrs[images[i]][attrName];
        			
        			// Update column
        			dTable.fnUpdate(origVal, rowPos, colPos);
        		}
        	});
		} // End of if
	} // End of for
	
	// Clear cookie containing list of images where
	// their attributes need to be updated
	$.cookie('images2update', '');
}

/**
 * Set definable image attributes
 * 
 * @param data
 *            Data returned from HTTP request
 * @return Nothing
 */
function setImageDefAttrs(data) {
	// Clear hash table containing definable image attributes
	defAttrs = new Array();
	
	// Get definable attributes
	var attrs = data.rsp[2].split(/\n/);

	// Go through each line
	var attr, key, descr;
	for (var i in attrs) {
		attr = attrs[i];
		
		// If the line is not empty
		if (attr) {
			// If the line has the attribute name 
			if (attr.indexOf(':') && attr.indexOf(' ')) {
    			// Get attribute name and description
    			key = jQuery.trim(attr.substring(0, attr.indexOf(':')));
    			descr = jQuery.trim(attr.substring(attr.indexOf(':') + 1));
    			
    			// Set hash table where key = attribute name and value = description
        		defAttrs[key] = descr;
			} else {				
				// Append description to hash table
				defAttrs[key] = defAttrs[key] + '\n' + attr;
			}
		} // End of if
	} // End of for
}

/**
 * Load set image properties page
 * 
 * @param tgtImage
 *            Target image to set properties
 * @return Nothing
 */
function loadEditImagePage(tgtImage) {
	// Get nodes tab
	var tab = getProvisionTab();

	// Generate new tab ID
	var inst = 0;
	var newTabId = 'editImageTab' + inst;
	while ($('#' + newTabId).length) {
		// If one already exists, generate another one
		inst = inst + 1;
		newTabId = 'editImageTab' + inst;
	}

	// Open new tab
	// Create set properties form
	var setPropsForm = $('<div class="form"></div>');

	// Create info bar
	var infoBar = createInfoBar('Choose the properties you wish to change on the node. When you are finished, click Save.');
	setPropsForm.append(infoBar);

	// Create an input for each definable attribute
	var div, label, input, descr, value;
	// Set node attribute
	origAttrs[tgtImage]['imagename'] = tgtImage;
	for (var key in defAttrs) {
		// If an attribute value exists
		if (origAttrs[tgtImage][key]) {
			// Set the value
			value = origAttrs[tgtImage][key];
		} else {
			value = '';
		}
		
		// Create label and input for attribute
		div = $('<div></div>').css('display', 'inline');
		label = $('<label>' + key + ':</label>').css('vertical-align', 'middle');
		input = $('<input type="text" value="' + value + '" title="' + defAttrs[key] + '"/>').css('margin-top', '5px');
		
		// Change border to blue onchange
		input.bind('change', function(event) {
			$(this).css('border-color', 'blue');
		});
		
		div.append(label);
		div.append(input);
		setPropsForm.append(div);
	}
	
	// Change style for last division
	div.css({
		'display': 'block',
		'margin': '0px 0px 10px 0px'
	});
	
	// Generate tooltips
	setPropsForm.find('div input[title]').tooltip({
		position: "center right",
		offset: [-2, 10],
		effect: "fade",
		opacity: 0.8,
		delay: 500,
		predelay: 800,
		events: {
		  def:     "mouseover,mouseout",
		  input:   "mouseover,mouseout",
		  widget:  "focus mouseover,blur mouseout",
		  tooltip: "mouseover,mouseout"
		}
	});

	/**
	 * Save
	 */
	var saveBtn = createButton('Save');
	saveBtn.bind('click', function(event) {	
		// Get all inputs
		var inputs = $('#' + newTabId + ' input');
		
		// Go through each input
		var args = '';
		var attrName, attrVal;
		inputs.each(function(){
			// If the border color is blue
			if ($(this).css('border-left-color') == 'rgb(0, 0, 255)') {
				// Change border color back to normal
				$(this).css('border-color', '');
				
				// Get attribute name and value
    			attrName = $(this).parent().find('label').text().replace(':', '');
    			attrVal = $(this).val();
    			
    			// Build argument string
    			if (args) {
    				// Handle subsequent arguments
    				args += ';' + attrName + '=' + attrVal;
    			} else {
    				// Handle the 1st argument
    				args += attrName + '=' + attrVal;
    			}
    		}
		});
		
		// Send command to change image attributes
    	$.ajax( {
    		url : 'lib/cmd.php',
    		dataType : 'json',
    		data : {
    			cmd : 'chdef',
    			tgt : '',
    			args : '-t;osimage;-o;' + tgtImage + ';' + args,
    			msg : 'out=' + newTabId + ';tgt=' + tgtImage
    		},

    		success: showChdefOutput
    	});
	});
	setPropsForm.append(saveBtn);
	
	/**
	 * Cancel
	 */
	var cancelBtn = createButton('Cancel');
	cancelBtn.bind('click', function(event) {
		// Close the tab
		tab.remove($(this).parent().parent().attr('id'));
	});
	setPropsForm.append(cancelBtn);

	// Append to discover tab
	tab.add(newTabId, 'Edit', setPropsForm, true);

	// Select new tab
	tab.select(newTabId);
}

/**
 * Load copy CDs page
 * 
 * @return Nothing
 */
function loadCopyLinuxPage() {
	// Get provision tab
	var tab = getProvisionTab();

	// Generate new tab ID
	var inst = 0;
	newTabId = 'copyLinuxTab' + inst;
	while ($('#' + newTabId).length) {
		// If one already exists, generate another one
		inst = inst + 1;
		newTabId = 'copyLinuxTab' + inst;
	}
	
	// Create copy Linux form
	var copyLinuxForm = $('<div class="form"></div>');
	
	// Create status bar, hide on load
	var statBarId = 'copyLinuxStatusBar' + inst;
	var statBar = createStatusBar(statBarId).hide();
	copyLinuxForm.append(statBar);

	// Create loader
	var loader = createLoader('');
	statBar.append(loader);
	
	// Create info bar
	var infoBar = createInfoBar('Copy Linux distributions and service levels from CDs or DVDs to the install directory.');
	copyLinuxForm.append(infoBar);
			
	// Create Linux ISO input
	var iso = $('<div></div>');
	var isoLabel = $('<label> Linux ISO/DVD:</label>').css('vertical-align', 'middle');
	var isoInput = $('<input type="text" id="iso" name="iso"/>').css('width', '300px');
	iso.append(isoLabel);
	iso.append(isoInput);
	copyLinuxForm.append(iso);
	
	// Create architecture input
	copyLinuxForm.append('<div><label>Architecture:</label><input type="text" id="arch" name="arch" title="The architecture of the Linux distro on the ISO/DVD, e.g. rhel5.3, centos5.1, fedora9."/></div>');
	// Create distribution input
	copyLinuxForm.append('<div><label>Distribution:</label><input type="text" id="distro" name="distro" title="The Linux distro name and version that the ISO/DVD contains, e.g. x86, s390x, ppc64."/></div>');
	
	// Generate tooltips
	copyLinuxForm.find('div input[title]').tooltip({
		position: "center right",
		offset: [-2, 10],
		effect: "fade",		
		opacity: 0.7,
		delay: 500,
		predelay: 800,
		events: {
			def:     "mouseover,mouseout",
			input:   "mouseover,mouseout",
			widget:  "focus mouseover,blur mouseout",
			tooltip: "mouseover,mouseout"
		}
	});
	
	/**
	 * Browse
	 */
	var browseBtn = createButton('Browse');
	iso.append(browseBtn);
	// Browse server directory and files
	browseBtn.serverBrowser({
		onSelect : function(path) {
			$('#iso').val(path);
		},
		onLoad : function() {
			return $('#iso').val();
		},
		knownExt : [ 'exe', 'js', 'txt' ],
		knownPaths : [ {
			text : 'Install',
			image : 'desktop.png',
			path : '/install'
		} ],
		imageUrl : 'images/',
		systemImageUrl : 'images/',
		handlerUrl : 'lib/getpath.php',
		title : 'Browse',
		requestMethod : 'POST',
		width : '500',
		height : '300',
		basePath : '/install' // Limit user to only install directory
	});
	
	/**
	 * Copy
	 */
	var copyBtn = createButton('Copy');
	copyLinuxForm.append(copyBtn);
	copyBtn.bind('click', function(event) {
		// Disable all inputs and buttons
		$('#' + newTabId + ' input').attr('disabled', 'true');
		$('#' + newTabId + ' button').attr('disabled', 'true');
		// Show status bar and loader
		$('#' + statBarId).show();
		$('#' + statBarId).find('img').show();
		
		// Get Linux ISO
		var iso = $('#' + newTabId + ' input[name=iso]').val();
		// Get architecture
		var arch = $('#' + newTabId + ' input[name=arch]').val();
		// Get distribution
		var distro = $('#' + newTabId + ' input[name=distro]').val();

		// Send ajax request to copy ISO
		$.ajax( {
			url : 'lib/cmd.php',
			dataType : 'json',
			data : {
				cmd : 'copycds',
				tgt : '',
				args : '-n;' + distro + ';-a;' + arch + ';' + iso,
				msg : 'out=' + statBarId
			},

			/**
			 * Show output
			 * 
			 * @param data
			 *            Data returned from HTTP request
			 * @return Nothing
			 */
			success : function(data) {
				// Get output
				var out = data.rsp;
				// Get status bar ID
				var statBarId = data.msg.replace('out=', '');
				// Get tab ID
				var tabId = statBarId.replace('copyLinuxStatusBar', 'copyLinuxTab'); 
				
				// Go through output and append to paragraph
				var prg = $('<p></p>');
				for (var i in out) {
					if (out[i].length > 6) {
						prg.append(out[i] + '<br>');
					}
				}
				$('#' + statBarId).append(prg);
				
				// Hide loader
				$('#' + statBarId).find('img').hide();
				// Enable inputs and buttons
				$('#' + tabId + ' input').attr('disabled', '');
				$('#' + tabId + ' button').attr('disabled', '');
			}
		});
	});
	
	/**
	 * Cancel
	 */
	var cancelBtn = createButton('Cancel');
	copyLinuxForm.append(cancelBtn);
	cancelBtn.bind('click', function(event) {
		// Close the tab
		tab.remove($(this).parent().parent().attr('id'));
	});

	tab.add(newTabId, 'Copy', copyLinuxForm, true);
	tab.select(newTabId);
}