/**
 * Cookie plugin
 *
 * Copyright (c) 2006 Klaus Hartl (stilbuero.de)
 * Dual licensed under the MIT and GPL licenses:
 * http://www.opensource.org/licenses/mit-license.php
 * http://www.gnu.org/licenses/gpl.html
 *
 */

/**
 * Create a cookie with the given name and value and other optional parameters.
 *
 * @example $.cookie('the_cookie', 'the_value');
 * @desc Set the value of a cookie.
 * @example $.cookie('the_cookie', 'the_value', { expires: 7, path: '/', domain: 'jquery.com', secure: true });
 * @desc Create a cookie with all available options.
 * @example $.cookie('the_cookie', 'the_value');
 * @desc Create a session cookie.
 * @example $.cookie('the_cookie', null);
 * @desc Delete a cookie by passing null as value. Keep in mind that you have to use the same path and domain
 *       used when the cookie was set.
 *
 * @param String name The name of the cookie.
 * @param String value The value of the cookie.
 * @param Object options An object literal containing key/value pairs to provide optional cookie attributes.
 * @option Number|Date expires Either an integer specifying the expiration date from now on in days or a Date object.
 *                             If a negative value is specified (e.g. a date in the past), the cookie will be deleted.
 *                             If set to null or omitted, the cookie will be a session cookie and will not be retained
 *                             when the the browser exits.
 * @option String path The value of the path atribute of the cookie (default: path of page that created the cookie).
 * @option String domain The value of the domain attribute of the cookie (default: domain of page that created the cookie).
 * @option Boolean secure If true, the secure attribute of the cookie will be set and the cookie transmission will
 *                        require a secure protocol (like HTTPS).
 * @type undefined
 *
 * @name $.cookie
 * @cat Plugins/Cookie
 * @author Klaus Hartl/klaus.hartl@stilbuero.de
 */

/**
 * Get the value of a cookie with the given name.
 *
 * @example $.cookie('the_cookie');
 * @desc Get the value of a cookie.
 *
 * @param String name The name of the cookie.
 * @return The value of the cookie.
 * @type String
 *
 * @name $.cookie
 * @cat Plugins/Cookie
 * @author Klaus Hartl/klaus.hartl@stilbuero.de
 */
jQuery.cookie = function(name, value, options) {
    if (typeof value != 'undefined') { // name and value given, set cookie
        options = options || {};
        if (value === null) {
            value = '';
            options.expires = -1;
        }
        var expires = '';
        if (options.expires && (typeof options.expires == 'number' || options.expires.toUTCString)) {
            var date;
            if (typeof options.expires == 'number') {
                date = new Date();
                date.setTime(date.getTime() + (options.expires * 24 * 60 * 60 * 1000));
            } else {
                date = options.expires;
            }
            expires = '; expires=' + date.toUTCString(); // use expires attribute, max-age is not supported by IE
        }
        // CAUTION: Needed to parenthesize options.path and options.domain
        // in the following expressions, otherwise they evaluate to undefined
        // in the packed version for some reason...
        var path = options.path ? '; path=' + (options.path) : '';
        var domain = options.domain ? '; domain=' + (options.domain) : '';
        var secure = options.secure ? '; secure' : '';
        document.cookie = [name, '=', encodeURIComponent(value), expires, path, domain, secure].join('');
    } else { // only name given, get cookie
        var cookieValue = null;
        if (document.cookie && document.cookie !== '') {
            var cookies = document.cookie.split(';');
            for (var i = 0; i < cookies.length; i++) {
                var cookie = jQuery.trim(cookies[i]);
                // Does this cookie string begin with the name we want?
                if (cookie.substring(0, name.length + 1) == (name + '=')) {
                    cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
                    break;
                }
            }
        }
        return cookieValue;
    }
};

jQuery(function($){
	/*
	 * Object transforming products list into an interactive form
	 */
	var SmartPhonesForm = function(){
		var self = this, t;
		
		//create wrappers
		this.wrapper = $('<div id="smartphones-form"/>');		
		this.form = $('<form action="#" method="get" />');
	
		//append onSubmit callback to the form
		this.form.submit(this.onSubmit);
		
		//brand dropdown
		this.brand = $('<select id="brand"/>');
		this.brand.change(function(){
			//remember user selection
			$.cookie('brand',$(this).val());
			self.brandChange(this);
		});
				
		t = $('<p><label for="brand">brand</label> </p>');
		t.append(this.brand);		
		this.form.append(t);
		
		//model dropdown
		this.model = $('<select id="model"/>');		
		this.model.change(function(){
			//remember user selection
			$.cookie('model',$(this).val());
		});
		
		t = $('<p><label for="model">model</label> </p>');
		t.append(this.model);
		this.form.append(t);
		
		this.form.append('<p class="submit"><button type="submit">Get Your Free Quote</button></p>');
		this.wrapper.append(this.form);
	};
	
	//launched on form submit - takes user to the product page
	SmartPhonesForm.prototype.onSubmit = function(e){
		e.preventDefault();
		var loc = $('#model').val();
		if (loc) {
			window.location = loc;
		}
	};
	
	//populates model dropdown
	SmartPhonesForm.prototype.populateModel = function(brand) {
		var model = arguments[1] || this.model.empty(); //you can pass a select when it's not appended to DOM yet
		var active = arguments[2] || null; //active model
		var options = '<option value="">Please choose...</option>';

		$.each(this.items[brand], function(){
			
			//look for an active model 
			var selected = '';
			if (active === this.location) {
				selected = ' selected="selected"';
			}			
			options += '<option value="'+this.location+'"'+selected+'>'+this.name+'</option>';
		});
		model.append(options);
	};
	
	//clear all optiosn from model dropdown
	SmartPhonesForm.prototype.emptyModel = function(){
		this.model.empty().append('<option value="">Please, select a brand...</option>');		
	};
	
	//change the active brand
	SmartPhonesForm.prototype.brandChange = function(el){
		var brand = $(el).val();
		if (this.items[brand]) {
			this.populateModel(brand);
		}
		else {
			this.emptyModel();
		}
	};
	
	//read all items from products list
	SmartPhonesForm.prototype.populate = function(list){
		var self = this;
		this.items = {};
		//transform all list items into a tree structure
		$(list).find('li').each(function(index, item){
			var li = $(this);
			var brand = li.children().eq(1).children().eq(0).text();
			var model = li.children().eq(0).children().eq(0);
						
			var item = {
				location : model.attr('href'),
				name : model.text()
			};
			if (typeof self.items[brand] === 'undefined') {
				self.items[brand] = [];
			}
			
			self.items[brand][self.items[brand].length] = item;
		});
	
		//sort brands
		var brandNames = [];
		$.each(this.items, function(index, brand){
			brandNames[brandNames.length] = index;
			
			self.items[index].sort(function(a,b){
				if (a.name < b.name) {
					return -1;
				}
				else if (a.name > b.name) {
					return 1;
				}
				return 0;
			});
		});		
		brandNames.sort();
		
		
		var brand = this.form.find('#brand');
		
		var options = '<option value="">Please choose...</option>';
		$.each(brandNames, function(index,item){
			options += '<option value="'+item+'">'+item+'</option>';
		});

		brand.append(options);
		//look for the previous value
		var cookieBrand = $.cookie('brand');
		if (cookieBrand) {
			brand.find("option[value="+cookieBrand+"]").attr('selected','selected');		
		}
		
		//read previous user choice from cookie
		var cookieModel = $.cookie('model');
		if (cookieModel && cookieBrand) {			
			this.populateModel(cookieBrand, this.form.find('#model'), cookieModel);
		}
		else {
			this.form.find('#model').append('<option value="">Please, select a brand...</option>');			
		}
	};
	
	//return form 
	SmartPhonesForm.prototype.get = function(){
		return this.wrapper;
	};
	
	var form = new SmartPhonesForm();
	form.populate('#smartphones-list');
	$('#smartphones-list').after(form.get());
});