/*!
* Tiny Carousel 1.8
* http://www.baijs.nl/tinycarousel
*
* Copyright 2010, Maarten Baijs
* Dual licensed under the MIT or GPL Version 2 licenses.
* http://www.opensource.org/licenses/mit-license.php
* http://www.opensource.org/licenses/gpl-2.0.php
*
* Date: 10 / 11 / 2010
* Depends on library: jQuery
*/
(function ($) {
    $.fn.tinycarousel = function (options) {
        var defaults = {
            start: 1, // where should the carousel start?
            display: 1, // how many blocks do you want to move at 1 time?
            axis: 'x', // vertical or horizontal scroller? ( x || y ).
            controls: true, // show left and right navigation buttons.
            pager: false, // is there a page number navigation present?
            interval: false, // move to another block on intervals.
            intervaltime: 4000, // interval time in milliseconds.
            rewind: false, // If interval is true and rewind is true it will play in reverse if the last slide is reached.
            animation: true, // false is instant, true is animate.
            duration: 2000, // how fast must the animation move in ms?
            callback: null // function that executes after every move
        };
        var options = $.extend(defaults, options);

        var oSlider = $(this);
        var oViewport = $('.viewport:first', oSlider);
        var oContent = $('.overview:first', oSlider);
        var oPages = oContent.children();
        var oBtnNext = $('.next:first', oSlider);
        var oBtnPrev = $('.prev:first', oSlider);
        var oPager = $('.pager:first', oSlider);
        var iPageSize, iSteps, iCurrent, oTimer, bPause, bForward = true, bAxis = options.axis == 'x';

        return this.each(function () {
            initialize();
        });
        function initialize() {
            iPageSize = bAxis ? $(oPages[0]).outerWidth(true) : $(oPages[0]).outerHeight(true);
            var iLeftover = Math.ceil(((bAxis ? oViewport.outerWidth() : oViewport.outerHeight()) / (iPageSize * options.display)) - 1);
            iSteps = Math.max(1, Math.ceil(oPages.length / options.display) - iLeftover);
            //Tweak done for more sliding by Sagar
            //iSteps = iSteps + 1;
//            alert("Steps" + iSteps);
//            alert("Page size" + iPageSize);
//            alert("Pages length" + oPages.length);
            iCurrent = Math.min(iSteps, Math.max(1, options.start)) - 2;
            oContent.css(bAxis ? 'width' : 'height', (iPageSize * oPages.length));
            move(1);
            setEvents();
        }
        function setEvents() {
            if (options.controls && oBtnPrev.length > 0 && oBtnNext.length > 0) {
                oBtnPrev.click(function () { move(-1); return false; });
                oBtnNext.click(function () { move(1); return false; });
            }
            if (options.interval) {
                oSlider.hover(function () { clearTimeout(oTimer); bPause = true }, function () { bPause = false; setTimer(); });
            }
            if (options.pager && oPager.length > 0) {
                $('a', oPager).click(setPager);
            }
        }
        function setButtons() {
            if (options.controls) {
                oBtnPrev.toggleClass('disable', !(iCurrent > 0));
                oBtnNext.toggleClass('disable', !(iCurrent + 1 < iSteps));
            }
            if (options.pager) {
                var oNumbers = $('.pagenum', oPager);
                oNumbers.removeClass('active');
                $(oNumbers[iCurrent]).addClass('active');
            }
        }
        function setPager(oEvent) {
            if ($(this).hasClass('pagenum')) {
                iCurrent = parseInt(this.rel) - 1;
                move(1);
            }
            return false;
        }
        function setTimer() {
            if (options.interval && !bPause) {
                clearTimeout(oTimer);
                oTimer = setTimeout(function () {
                    iCurrent = !options.rewind && (iCurrent + 1 == iSteps) ? -1 : iCurrent;
                    bForward = iCurrent + 1 == iSteps ? false : iCurrent == 0 ? true : bForward;
                    move((options.rewind ? (bForward ? 1 : -1) : 1));
                }, options.intervaltime);
            }
        }
        function move(iDirection) {
            if (iCurrent + iDirection > -1 && iCurrent + iDirection < iSteps) {
                iCurrent += iDirection;
                var oPosition = {};
                oPosition[bAxis ? 'left' : 'top'] = -(iCurrent * (iPageSize * options.display));
                oContent.animate(oPosition, {
                    queue: false,
                    duration: options.animation ? options.duration : 0,
                    complete: function () {
                        if (typeof options.callback == 'function')
                            options.callback.call(this, oPages[iCurrent], iCurrent);
                    }
                });
                setButtons();
                setTimer();
            }
        }
    };
})(jQuery);