/*
 * jQuery selectbox plugin
 *
 * Copyright (c) 2007 Sadri Sahraoui (brainfault.com)
 * Licensed under the GPL license and MIT:
 *   http://www.opensource.org/licenses/GPL-license.php
 *   http://www.opensource.org/licenses/mit-license.php
 *
 * The code is inspired from Autocomplete plugin (http://www.dyve.net/jquery/?autocomplete)
 *
 * Revision: $Id$
 * Version: 0.6
 * 
 * Changelog :
 *  Version 0.6
 *  - Fix IE scrolling problem
 *  Version 0.5 
 *  - separate css style for current selected element and hover element which solve the highlight issue 
 *  Version 0.4
 *  - Fix width when the select is in a hidden div   @Pawel Maziarz
 *  - Add a unique id for generated li to avoid conflict with other selects and empty values @Pawel Maziarz
 */
jQuery.fn.extend( {
    selectbox : function(options) {
        return this.each( function() {
            new jQuery.SelectBox(this, options);
        });
    }
});

/* pawel maziarz: work around for ie logging */
if (!window.console) {
    var console = {
        log : function(msg) {
        }
    }
}
/* */

jQuery.SelectBox = function(selectobj, options) {
	
    var opt = options || {};
		
    opt.inputClass = opt.inputClass || "selectbox";
    opt.containerClass = opt.containerClass || "selectbox-wrapper";
    opt.hoverClass = opt.hoverClass || "current";
    opt.currentClass = opt.selectedClass || "selected"
    opt.debug = opt.debug || true;
	
    var elm_id = selectobj.id;
    var active = 0;
    var inFocus = false;
    var hasfocus = 0;
    // jquery object for select element
    var $select = $(selectobj);
    // jquery container object
    var $container = setupContainer(opt);
    // jquery input object
    var $input = setupInput(opt);
    // hide select and append newly created elements

    var disabled = false;
	
    if($select.attr("disabled")){
        disabled = true;
        console.log("is disabled")
        $input.attr("disabled","disabled")
    }else{
        console.log("is !disabled")
    }
	
    try {

        $select.wrap("<div class=\"selectContainer\" style=\"width:"
            + selectobj.offsetWidth + "\"></div>");
		
        $select.hide().before($input).before($container);

        var clickfake = addClickFake($input);

        clickfake.after("<p style='clear:both'/>")

        clickfake.click( function() {
            if(!disabled){
                $input.trigger("focus")
                $input.trigger("click")
            }
        })
		
    } catch (e) {
        alert(e.name + " :: " + e.message + " -- " + e.description)
    }

    init();

    $input.click( function() {
        if (!inFocus) {
            if(disabled)
                $container.toggle();
        }
    }).focus( function() {
        if ($container.not(':visible')) {
            inFocus = true;
            $container.show();
        }
    }).keydown( function(event) {
        switch (event.keyCode) {
            case 38: // up
                event.preventDefault();
                moveSelect(-1);
                break;
            case 40: // down
                event.preventDefault();
                moveSelect(1);
                break;
            // case 9: // tab
        case 13: // return
            event.preventDefault(); // seems not working in mac !
            $('li.' + opt.hoverClass).trigger('click');
            break;
        case 27: // escape
            hideMe();
            break;
    }
}).blur( function() {
    if ($container.is(':visible') && hasfocus > 0) {
        if (opt.debug)
            console.log('container visible and has focus')
    } else {
        // Workaround for ie scroll - thanks to Bernd Matzner
        if ($.browser.msie || $.browser.safari) { // check for safari too
            // - workaround for
            // webkit
            if (document.activeElement.getAttribute('id').indexOf(
            '_container') == -1) {
                hideMe();
            } else {
                $input.focus();
            }
        } else {
            hideMe();
        }
    }
});

function hideMe() {
    hasfocus = 0;
    $container.hide();
}

function init() {
    $container.append(getSelectOptions($input.attr('id'))).hide();
    if(!$container.css("width")){
        var width = $input.css('width');
        $container.width(width);
    }
}

function setupContainer(options) {
    var container = document.createElement("div");
    $container = $(container);
    $container.attr('id', elm_id + '_container');
    $container.addClass(options.containerClass);

    return $container;
}

function addClickFake($input) {

    try {

        var clickFake = document.createElement("div");

        $clickFake = $(clickFake);

        $clickFake.addClass("clickFake");

        $input.after($clickFake);

        return $clickFake;

    } catch (e) {
        alert(e.name + " :: " + e.message + " -- " + e.description)
    }
}

function setupInput(options) {
    var input = document.createElement("input");
    var $input = $(input);
    $input.attr("id", elm_id + "_input");
    $input.attr("type", "text");
    $input.addClass(options.inputClass);
    $input.attr("autocomplete", "off");
    $input.attr("readonly", "readonly");
    $input.attr("tabIndex", $select.attr("tabindex")); // "I" capital is
    // important for ie

    return $input;
}

function moveSelect(step) {
    var lis = $("li", $container);
    if (!lis || lis.length == 0)
        return false;
    active += step;
    // loop through list
    if (active < 0) {
        active = lis.size();
    } else if (active > lis.size()) {
        active = 0;
    }
    scroll(lis, active);
    lis.removeClass(opt.hoverClass);

    $(lis[active]).addClass(opt.hoverClass);
}

function scroll(list, active) {
    var el = $(list[active]).get(0);
    var list = $container.get(0);

    if (el.offsetTop + el.offsetHeight > list.scrollTop + list.clientHeight) {
        list.scrollTop = el.offsetTop + el.offsetHeight - list.clientHeight;
    } else if (el.offsetTop < list.scrollTop) {
        list.scrollTop = el.offsetTop;
    }
}

function setCurrent() {
    var li = $("li." + opt.currentClass, $container).get(0);
    var ar = ('' + li.id).split('_');
    var el = ar[ar.length - 1];
    $select.val(el);
    $input.val($(li).html());
    return true;
}

// select value
function getCurrentSelected() {
    return $select.val();
}

// input value
function getCurrentValue() {
    return $input.val();
}

function getSelectOptions(parentid) {
    var select_options = new Array();
    var ul = document.createElement('ul');
    $select.children('option').each( function(i) {
        var li = document.createElement('li');
        li.setAttribute('id', parentid + '_' + $(this).val());
        li.innerHTML = $(this).html();
        if ($(this).is(':selected')) {
            $input.val($(this).html());
            $(li).addClass(opt.currentClass);
        }
        ul.appendChild(li);
        $(li).mouseover( function(event) {
            hasfocus = 1;
            if (opt.debug)
                console.log('over on : ' + this.id);
            jQuery(event.target, $container).addClass(opt.hoverClass);
        }).mouseout( function(event) {
            hasfocus = -1;
            if (opt.debug)
                console.log('out on : ' + this.id);
            jQuery(event.target, $container).removeClass(opt.hoverClass);
        }).click( function(event) {
            var fl = $('li.' + opt.hoverClass, $container).get(0);
            if (opt.debug)
                console.log('click on :' + this.id);
            $('li.' + opt.currentClass).removeClass(opt.currentClass);
            $(this).addClass(opt.currentClass);
            setCurrent();
            $select.get(0).blur();
            $select.trigger('change');
            hideMe();
        });
    });
    return ul;
}

};