/**
 * EGroupware eTemplate2 - JS Selectbox object
 *
 * @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
 * @package etemplate
 * @subpackage api
 * @link http://www.egroupware.org
 * @author Nathan Gray
 * @author Andreas Stöckel
 * @copyright Nathan Gray 2011
 * @version $Id$
 */

"use strict";

/*egw:uses
	jquery.jquery;
	/phpgwapi/js/jquery/chosen/chosen.jquery.js;
	et2_core_xml;
	et2_core_DOMWidget;
	et2_core_inputWidget;
*/

/**
 * @augments et2_inputWidget
 */
var et2_selectbox = et2_inputWidget.extend(
{
	attributes: {
		"multiple": {
			"name": "multiple",
			"type": "boolean",
			"default": false,
			"description": "Allow selecting multiple options"
		},
		"rows": {
			"name": "Rows",
			"type": "any",	// Old options put either rows or empty_label in first space
			"default": 1,
			"description": "Number of rows to display"
		},
		"empty_label": {
			"name": "Empty label",
			"type": "string",
			"default": "",
			"description": "Textual label for first row, eg: 'All' or 'None'.  ID will be ''"
		},
		"select_options": {
			"type": "any",
			"name": "Select options",
			"default": {},
			"description": "Internaly used to hold the select options."
		},
		"selected_first": {
			"name": "Selected options first",
			"type": "boolean",
			"default": true,
			"description": "For multi-selects, put the selected options at the top of the list when first loaded"
		},

		// Chosen options
		"search": {
			"name": "Search",
			"type": "boolean",
			"default": false,
			"description": "For single selects, add a search box to the drop-down list"
		},
		"tags": {
			"name": "Tag style",
			"type": "boolean",
			"default": false,
			"description": "For multi-selects, displays selected as a list of tags instead of a big list"
		},

		// Value can be string or integer
		"value": {
			"type": "any"
		},
		// Type specific legacy options.  Avoid using.
		"other": {
			"ignore": true, 
			"type": "any"
		}
	},

	legacyOptions: ["rows","other"], // Other is sub-type specific

	/**
	 * Construtor
	 * 
	 * @memberOf et2_selectbox
	 */
	init: function() {
		this._super.apply(this, arguments);

		this.input = null;
		this.value = '';

		// Grab value if already available
		if(typeof this.options.value != 'undefined')
		{
			this.value = this.options.value;
		}
 
		// Allow no other widgets inside this one
		this.supportedWidgetClasses = [];

		// Legacy options could have row count or empty label in first slot	 
		if(typeof this.options.rows == "string")
		{
			if(isNaN(this.options.rows)) 
			{
				this.options.empty_label = this.egw().lang(this.options.rows);
				this.options.rows = 1;
			}
			else
			{
				this.options.rows = parseInt(this.options.rows);
			}
		}

		if(this.options.rows > 1) 
		{
			this.options.multiple = true;
			if(this.options.tags)
			{
				this.createInputWidget();
			}
			else
			{
				this.createMultiSelect();
			}
		}
		else
		{
			this.createInputWidget();
		}
	},

	destroy: function() {
		if(this.input != null)
		{
			this.input.unchosen();
		}
		this._super.apply(this, arguments);

		this.input = null;
	},

	transformAttributes: function(_attrs) {
		this._super.apply(this, arguments);

		// If select_options are already known, skip the rest
		if(this.options && this.options.select_options && !jQuery.isEmptyObject(this.options.select_options))
		{
			return;
		}

		var name_parts = this.id.replace(/[/g,'[').replace(/]|]/g,'').split('[');

		// Try to find the options inside the "sel-options" array
		if(this.getArrayMgr("sel_options"))
		{
			var content_options = {};

			// Try first according to ID
			content_options = this.getArrayMgr("sel_options").getEntry(this.id);
			// ID can get set to an array with 0 => ' ' - not useful
			if(content_options && content_options.length == 1 && typeof content_options[0] == 'string' && content_options[0].trim() == '')
			{
				content_options = null;
			}
			// We could wind up too far inside options if label,title are defined
			if(content_options && !isNaN(name_parts[name_parts.length -1]) && content_options.label && content_options.title)
			{
				name_parts.pop();
				content_options = this.getArrayMgr("sel_options").getEntry(name_parts.join('['));
				delete content_options["$row"];
			}

			// Select options tend to be defined once, at the top level, so try that
			if(!content_options || content_options.length == 0)
			{
				content_options = this.getArrayMgr("sel_options").getRoot().getEntry(name_parts[name_parts.length-1]);
			}

			// Try in correct namespace (inside a grid or something)
			if(!content_options || content_options.length == 0)
			{
				content_options = this.getArrayMgr("sel_options").getEntry(name_parts[name_parts.length-1]);
			}

			// Maybe in a row, and options got stuck in ${row} instead of top level
			var row_stuck = ['${row}','{$row}'];
			for(var i = 0; i < row_stuck.length; i++)
			{
				if((!content_options || content_options.length == 0) && (
					// perspectiveData.row in nm, data["${row}"] in an auto-repeat grid
					this.getArrayMgr("sel_options").perspectiveData.row || this.getArrayMgr("sel_options").data[row_stuck[i]]))
				{
					var row_id = this.id.replace(/[0-9]+/,row_stuck[i]);
					content_options = this.getArrayMgr("sel_options").getEntry(row_id);
					if(!content_options || content_options.length == 0)
					{
						content_options = this.getArrayMgr("sel_options").getEntry(row_stuck[i] + '[' + this.id + ']');
					}
				}
			}
			if(_attrs["select_options"] && content_options)
			{
				_attrs["select_options"] = jQuery.extend({},_attrs["select_options"],content_options);
			} else if (content_options) {
				_attrs["select_options"] = content_options;
			}
		}

		// Check whether the options entry was found, if not read it from the
		// content array.
		if (jQuery.isEmptyObject(_attrs["select_options"]))
		{
			// If that didn't work, check according to ID
			_attrs["select_options"] = content_options ? content_options : this.getArrayMgr('content')
				.getEntry("options-" + this.id);
			// Again, try last name part at top level - this is usually just the value
			var content_options = this.getArrayMgr('content').getRoot().getEntry(name_parts[name_parts.length-1]);
		}

		// Default to an empty object
		if (_attrs["select_options"] == null)
		{
			_attrs["select_options"] = {};
		}
	},

	/**
	 * Add an option to regular drop-down select
	 */
	_appendOptionElement: function(_value, _label, _title, dom_element) {
		if(_value == "" && (_label == null || _label == "")) {
			_label = this.options.empty_label;
		}

		if(this.input == null)
		{
			return this._appendMultiOption(_value, _label, _title, dom_element);
		}

		
		var option = $j(document.createElement("option"))
			.attr("value", _value)
			.text(_label+"");

		if (typeof _title != "undefined" && _title)
		{
			option.attr("title", _title);
		}
		if(_label == this.options.empty_label || this.options.empty_label == "" && _value == "")
		{
			// Make sure empty / all option is first
			option.prependTo(this.input);
		}
		else 
		{
			option.appendTo(dom_element || this.input);
		}
	},

	/**
	 * Append a value to multi-select 
	 */
	_appendMultiOption: function(_value, _label, _title, dom_element) {
		var option_data = null;
		if(typeof _label == "object")
		{
			option_data = _label;
			_label = option_data.label;
		}

		// Already in header
		if(_label == this.options.empty_label) return;
		
		var opt_id = this.dom_id + "_opt_" + _value;
		var label = jQuery(document.createElement("label"))
			.attr("for", opt_id)
			.hover(
				function() {jQuery(this).addClass("ui-state-hover");},
				function() {jQuery(this).removeClass("ui-state-hover");}
			);
		var option = jQuery(document.createElement("input"))
			.attr("type", "checkbox")
			.attr("id",opt_id)
			.attr("value", _value)
			.appendTo(label);
		if(typeof _title !== "undefined")
		{
			option.attr("title",_title);
		}

		// Some special stuff for categories
		if(option_data )
		{
			if(option_data.icon)
			{
				var img = this.egw().image(option_data.icon);
				jQuery(document.createElement("img"))
					.attr("src", img)
					.appendTo(label);
			}
			if(option_data.color)
			{
				label.css("background-color",option_data.color);
			}
		}
		label.append(jQuery("<span>"+_label+"</span>"));
		var li = jQuery(document.createElement("li")).append(label);
		
		li.appendTo(dom_element || this.multiOptions);
	},

	/**
	 * Create a regular drop-down select box
	 */
	createInputWidget: function() {
		// Create the base input widget
		this.input = $j(document.createElement("select"))
			.addClass("et2_selectbox")
			.attr("size", this.options.rows);

		this.setDOMNode(this.input[0]);

		// Add the empty label
		if(this.options.empty_label)
		{
			this._appendOptionElement("", this.options.empty_label);
		}

		// Set multiple
		if(this.options.multiple)
		{
			this.input.attr("multiple", "multiple");
		}
	},

	/**
	 * Create a list of checkboxes
	 */
	createMultiSelect: function() {
		var node = jQuery(document.createElement("div"))
			.addClass("et2_selectbox");

		var header = jQuery(document.createElement("div"))
			.addClass("ui-widget-header ui-helper-clearfix")
			.appendTo(node);
		var controls = jQuery(document.createElement("ul"))
			.addClass('ui-helper-reset')
			.appendTo(header);

		if(this.options.empty_label)
		{
			jQuery(document.createElement("span"))
				.text(this.options.empty_label)
				.addClass("ui-multiselect-header")
				.appendTo(header);
		}
		
		// Set up for options to be added later
		var options = this.multiOptions = jQuery(document.createElement("ul"));
		this.multiOptions.addClass("ui-multiselect-checkboxes ui-helper-reset")
			.css("height", 1.9*this.options.rows + "em")
			.appendTo(node);

		if(this.options.rows >= 5) 
		{
			// Check / uncheck all
			var header_controls = {
				check: {
					icon_class: 'ui-icon-check',
					label:	'Check all',
					click: function(e) {
						var all_set = jQuery("input[type='checkbox']",e.data).prop("checked");
						jQuery("input[type='checkbox']",e.data).prop("checked", !all_set);
					}
				},
			};
			for(var key in header_controls)
			{
				jQuery(document.createElement("li"))
					.addClass("et2_clickable")
					.click(options, header_controls[key].click)
					.attr("title", header_controls[key].label)
					.append('<span class="ui-icon ' + header_controls[key].icon_class + '"/>')
					.appendTo(controls);
			}

		}
		
		// Hide the header, only show it on hover / focus, but show it out of flow, above
		// the list of options so it doesn't reflow the page
		var hide_header = !this.options.empty_label && !this.options.label;
		if(hide_header)
		{
			// Hide header
			header.hide();

			// Show / hide again
			node.on('mouseenter focusin', function(e) {
				// Don't show if dragging goes over
				if(e.which != 0) return;
				
				header.show();
				header.css("width", options.innerWidth() - (header.outerWidth() - header.width()) + 'px');
				header.css("position", "fixed");
				header.css("top", options.offset().top - header.outerHeight());
			});
			node.on('mouseleave focusout', function() {if(hide_header) header.hide();});
		}

		this.setDOMNode(node[0]);
	},

	doLoadingFinished: function() {
		this._super.apply(this, arguments);

		this.set_tags(this.options.tags);

		return true;
	},

	loadFromXML: function(_node) {
		// Handle special case where legacy option for empty label is used (conflicts with rows), and rows is set as an attribute
		var legacy;
		if(legacy = _node.getAttribute("options"))
		{
			var legacy = legacy.split(",");
			if(legacy.length && isNaN(legacy[0]))
			{
				this.options.empty_label = legacy[0];
			}
		}

		// Read the option-tags
		var options = et2_directChildrenByTagName(_node, "options");
		for (var i = 0; i < options.length; i++)
		{
			this.options.select_options[et2_readAttrWithDefault(options[i], "value", options[i].textContent)] = {
				"label": options[i].textContent,
				"title": et2_readAttrWithDefault(options[i], "title", "")
			};
		}
		this.set_select_options(this.options.select_options);
	},

	set_value: function(_value) {
		if(typeof _value == "string" && this.options.multiple && _value.match(/[,0-9A-Za-z]+$/) !== null)
		{
			_value = _value.split(',');
		}
		if(this.input !== null && (this.options.tags || this.options.search))
		{
			this.input.val(_value);
			this.input.trigger("liszt:updated");
			return;
		}
		if(this.input == null)
		{
			return this.set_multi_value(_value);
		}
		if(typeof _value != 'string' && jQuery(this.value).not(_value).length == 0 && jQuery(_value).not(this.value).length == 0)
		{
			// Unchanged
			if(_value == this.value) return;
		}
		jQuery("option",this.input).prop("selected", false);
		if(typeof _value == "array")
		{
			for(var i = 0; i < _value.length; i++)
			{
				jQuery("option[value='"+_value[i]+"']", this.input).prop("selected", true);
			}
		}
		else if (typeof _value == "object")
		{
			for(var i in _value)
			{
				jQuery("option[value='"+_value[i]+"']", this.input).prop("selected", true);
			}
		}
		else
		{
			if(jQuery("option[value='"+_value+"']", this.input).prop("selected", true).length == 0)
			{
				if(this.options.select_options[_value])
				{
					// Options not set yet? Do that now, which will try again.
					return this.set_select_options(this.options.select_options);
				}
				this.egw().debug("warning", "Tried to set value that isn't an option", this, _value);
			}
		}

		this.value = _value;
	},

	set_multi_value: function(_value) {
		jQuery("input",this.multiOptions).prop("checked", false);
		if(typeof _value == "array")
		{
			for(var i = 0; i < _value.length; i++)
			{
				jQuery("input[value='"+_value[i]+"']", this.multiOptions).prop("checked", true);
			}
		}
		else if (typeof _value == "object")
		{
			for(var i in _value)
			{
				jQuery("input[value='"+_value[i]+"']", this.multiOptions).prop("checked", true);
			}
		}
		else
		{
			if(jQuery("input[value='"+_value+"']", this.multiOptions).prop("checked", true).length == 0)
			{
				this.egw().debug("warning", "Tried to set value that isn't an option", this, _value);
			}
		}

		// Sort selected to the top
		if(this.selected_first)
		{
			this.multiOptions.find("li:has(input:checked)").prependTo(this.multiOptions);
		}
	},

	/**
	 * Turn tag style on and off
	 */
	set_tags: function(tags) {
		this.options.tags = tags;
		
		// Can't actually do chosen until attached, loadingFinished should call again
		if(!this.isAttached()) return;

		if(this.input != null && !this.options.tags && !this.options.search)
		{
			this.input.unchosen().css('width', '');
			
			return;
		}

		// Turn on tags, if desired
		if(this.input != null && (this.options.search || this.options.tags) && !this.options.disabled)
		{
			if(this.options.empty_label)
			{
				this.input.attr("data-placeholder", this.options.empty_label);
			}
			this.input.css("width",this.options.tags ? "100%":'')
				.chosen({
				})
				.change(this.onchange);
		}
	},

	/**
	 * The set_select_options function is added, as the select options have to be
	 * added after the "option"-widgets were added to selectbox.
	 */
	set_select_options: function(_options) {
		// Empty current options
		if(this.input)
		{
			this.input.empty();
		}
		else if (this.multiOptions)
		{
			this.multiOptions.empty();
		}
		// Re-add empty, it's usually not there
		if(this.options.empty_label)
		{
			this._appendOptionElement('', this.options.no_lang ? this.options.empty_label : this.egw().lang(this.options.empty_label));
		}

		// Add the select_options
		for (var key in _options)
		{

			// Translate the options
			if(!this.options.no_lang)
			{
				if (typeof _options[key] === 'object')
				{
					if(_options[key]["label"]) _options[key]["label"] = this.egw().lang(_options[key]["label"]);
					if(_options[key]["title"]) _options[key]["title"] = this.egw().lang(_options[key]["title"]);
				}
				else
				{
					_options[key] = this.egw().lang(_options[key]);
				}
			}

			if (typeof _options[key] === 'object' && _options[key] != null)
			{
				// Optgroup
				if(typeof _options[key]["label"] == 'undefined' && typeof _options[key]["title"] == "undefined")
				{
					var group = $j(document.createElement("optgroup"))
						.attr("label", this.options.no_lang ? key : this.egw().lang(key))
						.appendTo(this.input);
					if(this.input == null)
					{
						group = jQuery(document.createElement("ul"))
							.append('<li class="ui-widget-header"><span>'+key+'</span></li>')
							.appendTo(this.multiOptions);
					}
						
					for(var sub in _options[key])
					{
						if (typeof _options[key][sub] === 'object')
						{
							this._appendOptionElement(sub, 
								_options[key][sub]["label"] ? _options[key][sub]["label"] : "",
								_options[key][sub]["title"] ? _options[key][sub]["title"] : "",
								group
							);
						}
						else
						{
							this._appendOptionElement(key, _options[key][sub],undefined,group);
						}
					}
				}
				else if(this.input == null)
				{
					// Allow some special extras for objects by passing the whole thing
					_options[key]["label"] = _options[key]["label"] ? _options[key]["label"] : "";
					this._appendMultiOption(key, _options[key], _options[key]["title"]);
				}
				else
				{
					this._appendOptionElement(key,
						_options[key]["label"] ? _options[key]["label"] : "",
						_options[key]["title"] ? _options[key]["title"] : "");
				}
			}
			else
			{
				this._appendOptionElement(key, _options[key]);
			}
		}

		// Sometimes value gets set before options
		if(this.value || this.options.empty_label) this.set_value(this.value);
	},

	getValue: function() {
		if(this.input == null)
		{
			var value = [];
			jQuery("input:checked",this.multiOptions).each(function(){value.push(this.value);});
			this.value = value;
		}
		else
		{
			this.value = this._super.apply(this, arguments);
		}
		return this.value;
	}
});
et2_register_widget(et2_selectbox, ["menupopup", "listbox", "select", "select-cat",
	"select-percent", 'select-priority', 'select-access',
	'select-country', 'select-state', 'select-year', 'select-month',
	'select-day', 'select-dow', 'select-hour', 'select-number', 'select-app',
	'select-lang', 'select-bool', 'select-timezone' ]);

/**
 * et2_selectbox_ro is the readonly implementation of the selectbox.
 * 
 * @augments et2_selectbox
 */
var et2_selectbox_ro = et2_selectbox.extend([et2_IDetachedDOM], 
{
	/**
	 * Constructor
	 * 
	 * @memberOf et2_selectbox_ro
	 */
	init: function() {
		this._super.apply(this, arguments);

		this.supportedWidgetClasses = [];
		this.optionValues = {};
		if(this.options.select_options) this.set_select_options(this.options.select_options);
	},

	createInputWidget: function() {
		this.span = $j(document.createElement("span"))
			.addClass("et2_selectbox readonly")
			.text(this.options.empty_label);

		this.setDOMNode(this.span[0]);
	},

	// Handle read-only multiselects in the same way
	createMultiSelect: function() {
		this.span = $j(document.createElement("ul"))
			.addClass("et2_selectbox readonly");

		this.setDOMNode(this.span[0]);
	},

	loadFromXML: function(_node) {
		// Read the option-tags
		var options = et2_directChildrenByTagName(_node, "options");
		for (var i = 0; i < options.length; i++)
		{
			this.optionValues[et2_readAttrWithDefault(options[i], "value", 0)] =
			{
				"label": options[i].textContent,
				"title": et2_readAttrWithDefault(options[i], "title", "")
			};
		}
	},

	set_select_options: function(_options) {
		for (var key in _options)
		{
			// Translate the options
			if(!this.options.no_lang)
			{
				if (typeof _options[key] === 'object' && _options[key] != null)
				{
					if(_options[key]["label"]) _options[key]["label"] = this.egw().lang(_options[key]["label"]);
					if(_options[key]["title"]) _options[key]["title"] = this.egw().lang(_options[key]["title"]);
				}
				else
				{
					_options[key] = this.egw().lang(_options[key]);
				}
			}
			this.optionValues[key] = _options[key];
		}
	},

	set_value: function(_value) {
		if(typeof _value == "string" && _value.match(/[,0-9A-Za-z]+$/) !== null)
		{
			_value = _value.split(',');
		}
		this.value = _value;
		if(typeof _value == "object")
		{
			this.span.empty();
			if(_value)
			{
				for(var i = 0; i < _value.length; i++)
				{
					var option = this.optionValues[_value[i]];
					if(typeof option === "object" && option != null)
					{
						option = option.label;
					}
					else if (typeof option == 'undefined')
					{
						// Not a valid option
						continue;
					}
					this.span.append("<li>"+option+"</li>");
				}
			}
			return;
		}
		var option = this.optionValues[_value];
		if (typeof option === 'object' && option != null)
		{
			this.span.text(option.label);
			this.set_statustext(option.title);
		}
		else if (typeof option === 'string')
		{
			this.span.text(option);
		}
		else
		{
			this.span.text("");
		}
	},

	/**
	 * Override parent to return null - no value, not node value
	 */
	getValue: function() {
		return null;
	},

	/**
	 * Functions for et2_IDetachedDOM
	 */
	 /**
         * Creates a list of attributes which can be set when working in the
         * "detached" mode. The result is stored in the _attrs array which is provided
         * by the calling code.
         */
        getDetachedAttributes: function(_attrs) {
                _attrs.push("value");
        },

        /**
         * Returns an array of DOM nodes. The (relatively) same DOM-Nodes have to be
         * passed to the "setDetachedAttributes" function in the same order.
         */
        getDetachedNodes: function() {
                return [this.span[0]];
        },

        /**
         * Sets the given associative attribute->value array and applies the
         * attributes to the given DOM-Node.
         *
         * @param _nodes is an array of nodes which have to be in the same order as
         *      the nodes returned by "getDetachedNodes"
         * @param _values is an associative array which contains a subset of attributes
         *      returned by the "getDetachedAttributes" function and sets them to the
         *      given values.
         */
        setDetachedAttributes: function(_nodes, _values) {
                this.span = jQuery(_nodes[0]);
                this.set_value(_values["value"]);
	}
});
et2_register_widget(et2_selectbox_ro, ["menupopup_ro", "listbox_ro", "select_ro", "select-cat_ro",
	"select-percent_ro", 'select-priority_ro', 'select-access_ro',
	'select-country_ro', 'select-state_ro', 'select-year_ro', 'select-month_ro',
	'select-day_ro', 'select-dow_ro', 'select-hour_ro', 'select-number_ro', 'select-app_ro',
	'select-lang_ro', 'select-bool_ro', 'select-timezone_ro' ]);

/**
 * Widget class which represents a single option inside a selectbox
 */
/*var et2_option = et2_baseWidget.extend({

	attributes: {
		"value": {
			"name": "Value",
			"type": "string",
			"description": "Value which is sent back to the server when this entry is selected."
		},
		"label": {
			"name": "Label",
			"type": "string",
			"description": "Caption of the option element"
		},
		"width": {
			"ignore": true
		},
		"height": {
			"ignore": true
		},
		"align": {
			"ignore": true
		}
	},

	init: function() {
		this._super.apply(this, arguments);

		// Only allow other options inside of this element
		this.supportedWidgetClasses = [et2_option];

		this.option = $j(document.createElement("option"))
			.attr("value", this.options.value)
			.attr("selected", this._parent.options.value == this.options.value ?
				"selected" : "");

		if (this.options.label)
		{
			this.option.text(this.options.label);
		}

		this.setDOMNode(this.option[0]);
	},

	destroy: function() {
		this._super.apply(this, arguments);

		this.option = null;
	},

	loadContent: function(_data) {
		this.option.text(_data);
	}

/*	Doesn't work either with selectboxes
	set_statustext: function(_value) {
		this.statustext = _value;
		this.option.attr("title", _value);
	}*/

//});*/

//et2_register_widget(et2_option, ["option"]);


/**
 * Class which just implements the menulist container
 * 
 * @augments et2_DOMWidget
 */ 
var et2_menulist = et2_DOMWidget.extend(
{
	/**
	 * Construtor
	 * 
	 * @memberOf et2_menulist
	 */
	init: function() {
		this._super.apply(this, arguments);

		this.supportedWidgetClasses = [et2_selectbox, et2_selectbox_ro];
	},

	// Just pass the parent DOM node through
	getDOMNode: function(_sender) {
		if (_sender != this)
		{
			return this._parent.getDOMNode(this);
		}

		return null;
	},

	// Also need to pass through parent's children
	getChildren: function() {
		return this._parent.getChildren();
	}

});
et2_register_widget(et2_menulist, ["menulist"]);