/**
 * Coin Slider - Unique jQuery Image Slider
 * @version: 1.0 - (2010/04/04)
 * @requires jQuery v1.2.2 or later 
 * @author Ivan Lazarevic
 * Examples and documentation at: http://workshop.rs/projects/coin-slider/
 
 * Licensed under MIT licence:
 *   http://www.opensource.org/licenses/mit-license.php
**/

(function($) {

    var params = new Array;
    var order = new Array;
    var images = new Array;
    var links = new Array;
    var linksTarget = new Array;
    var titles = new Array;
    var interval = new Array;
    var imagePos = new Array;
    var appInterval = new Array;
    var squarePos = new Array;
    var reverse = new Array;

    $.fn.coinslider = $.fn.CoinSlider = function(options) {

        init = function(el) {

            order[el.id] = new Array(); // order of square appereance
            images[el.id] = new Array();
            links[el.id] = new Array();
            linksTarget[el.id] = new Array();
            titles[el.id] = new Array();
            imagePos[el.id] = 0;
            squarePos[el.id] = 0;
            reverse[el.id] = 1;

            params[el.id] = $.extend({}, $.fn.coinslider.defaults, options);

            // create images, links and titles arrays
            $.each($('#' + el.id + ' img'), function(i, item) {
                images[el.id][i] = $(item).attr('src');
                links[el.id][i] = $(item).parent().is('a') ? $(item).parent().attr('href') : '';
                linksTarget[el.id][i] = $(item).parent().is('a') ? $(item).parent().attr('target') : '';
                titles[el.id][i] = $(item).next().is('span') ? $(item).next().html() : '';
                $(item).hide();
                $(item).next().hide();
            });


            $(el).css({
                'display': 'block',
                'visibility': 'visible'
            });

            // set panel
            $(el).css({
                'background-image': 'url(' + images[el.id][0] + ')',
                'width': params[el.id].width,
                'height': params[el.id].height,
                'position': 'relative',
                'background-position': 'top left'
            }).wrap("<div class='coin-slider' id='coin-slider-" + el.id + "' />");

            // create title bar
            $('#' + el.id).append("<div class='cs-title' id='cs-title-" + el.id + "' style='position: absolute; bottom:0; left: 0; z-index: 1000;'></div>");

            $.setFields(el);

            if (params[el.id].navigation)
                $.setNavigation(el);

            if (params[el.id].numericalnav)
                $.setnumericalNavigation(el);


            $.transition(el, 0);
            $.transitionCall(el);

        }

        // squares positions
        $.setFields = function(el) {

            tWidth = sWidth = parseInt(params[el.id].width / params[el.id].spw);
            tHeight = sHeight = parseInt(params[el.id].height / params[el.id].sph);

            counter = sLeft = sTop = 0;
            tgapx = gapx = params[el.id].width - params[el.id].spw * sWidth;
            tgapy = gapy = params[el.id].height - params[el.id].sph * sHeight;

            for (i = 1; i <= params[el.id].sph; i++) {
                gapx = tgapx;

                if (gapy > 0) {
                    gapy--;
                    sHeight = tHeight + 1;
                } else {
                    sHeight = tHeight;
                }

                for (j = 1; j <= params[el.id].spw; j++) {

                    if (gapx > 0) {
                        gapx--;
                        sWidth = tWidth + 1;
                    } else {
                        sWidth = tWidth;
                    }

                    order[el.id][counter] = i + '' + j;
                    counter++;

                    if (params[el.id].links)
                        $('#' + el.id).append("<a href='" + links[el.id][0] + "' class='cs-" + el.id + "' id='cs-" + el.id + i + j + "' style='width:" + sWidth + "px; height:" + sHeight + "px; float: left; position: absolute;'></a>");
                    else
                        $('#' + el.id).append("<div class='cs-" + el.id + "' id='cs-" + el.id + i + j + "' style='width:" + sWidth + "px; height:" + sHeight + "px; float: left; position: absolute;'></div>");

                    // positioning squares
                    $("#cs-" + el.id + i + j).css({
                        'background-position': -sLeft + 'px ' + (-sTop + 'px'),
                        'left': sLeft,
                        'top': sTop
                    });

                    sLeft += sWidth;
                }

                sTop += sHeight;
                sLeft = 0;

            }


            $('.cs-' + el.id).mouseover(function() {
                $('#cs-navigation-' + el.id).show();
            });

            $('.cs-' + el.id).mouseout(function() {
                $('#cs-navigation-' + el.id).show();
            });

            $('#cs-title-' + el.id).mouseover(function() {
                $('#cs-navigation-' + el.id).show();
            });

            $('#cs-title-' + el.id).mouseout(function() {
                $('#cs-navigation-' + el.id).show();
            });

            if (params[el.id].hoverPause) {
                $('.cs-' + el.id).mouseover(function() {
                    params[el.id].pause = true;
                });

                $('.cs-' + el.id).mouseout(function() {
                    params[el.id].pause = false;
                });

                $('#cs-title-' + el.id).mouseover(function() {
                    params[el.id].pause = true;
                });

                $('#cs-title-' + el.id).mouseout(function() {
                    params[el.id].pause = false;
                });
            }


        };


        $.transitionCall = function(el) {

            clearInterval(interval[el.id]);
            delay = params[el.id].delay + params[el.id].spw * params[el.id].sph * params[el.id].sDelay;
            interval[el.id] = setInterval(function() { $.transition(el) }, delay);

        }

        // transitions
        $.transition = function(el, direction) {

            if (params[el.id].pause == true) return;

            $.effect(el);

            squarePos[el.id] = 0;
            appInterval[el.id] = setInterval(function() { $.appereance(el, order[el.id][squarePos[el.id]]) }, params[el.id].sDelay);

            $(el).css({ 'background-image': 'url(' + images[el.id][imagePos[el.id]] + ')' });

            if (typeof (direction) == "undefined")
                imagePos[el.id]++;
            else
                if (direction == 'prev')
                imagePos[el.id]--;
            else
                imagePos[el.id] = direction;

            if (imagePos[el.id] == images[el.id].length) {
                imagePos[el.id] = 0;
            }

            if (imagePos[el.id] == -1) {
                imagePos[el.id] = images[el.id].length - 1;
            }

            $('.cs-button-' + el.id).removeClass('cs-active');
            $('.cs-button-' + el.id).addClass('cs-inactive');
            $('#cs-button-' + el.id + "-" + (imagePos[el.id] + 1)).removeClass('cs-inactive');
            $('#cs-button-' + el.id + "-" + (imagePos[el.id] + 1)).addClass('cs-active');

            if (titles[el.id][imagePos[el.id]]) {
                $('#cs-title-' + el.id).css({ 'opacity': 0 }).animate({ 'opacity': params[el.id].opacity }, params[el.id].titleSpeed);
                $('#cs-title-' + el.id).html(titles[el.id][imagePos[el.id]]);
            } else {
                $('#cs-title-' + el.id).css('opacity', 0);
            }

        };

        $.appereance = function(el, sid) {

            $('.cs-' + el.id).attr('href', links[el.id][imagePos[el.id]]).attr('target', linksTarget[el.id][imagePos[el.id]]);

            if (squarePos[el.id] == params[el.id].spw * params[el.id].sph) {
                clearInterval(appInterval[el.id]);
                return;
            }

            $('#cs-' + el.id + sid).css({ opacity: 0, 'background-image': 'url(' + images[el.id][imagePos[el.id]] + ')' });
            $('#cs-' + el.id + sid).animate({ opacity: 1 }, 300);
            squarePos[el.id]++;

        };

        // navigation
        $.setNavigation = function(el) {

            if (images[el.id].length > 1) //code added
            {

                // create prev and next 
                $(el).append("<div id='cs-navigation-" + el.id + "'></div>");
                $('#cs-navigation-' + el.id).show();

                $('#cs-navigation-' + el.id).append("<a href='#' id='cs-prev-" + el.id + "' class='cs-prev'>prev</a>");
                $('#cs-navigation-' + el.id).append("<a href='#' id='cs-next-" + el.id + "' class='cs-next'>next</a>");
                $('#cs-prev-' + el.id).css({
                    'position': 'absolute',
                    'top': params[el.id].height / 2 - 15,
                    'left': 0,
                    'z-index': 1001,
                    'line-height': '30px',
                    'opacity': params[el.id].opacity
                }).click(function(e) {
                    e.preventDefault();
                    $.transition(el, 'prev');
                    $.transitionCall(el);
                }).mouseover(function() { $('#cs-navigation-' + el.id).show() });

                $('#cs-next-' + el.id).css({
                    'position': 'absolute',
                    'top': params[el.id].height / 2 - 15,
                    'right': 0,
                    'z-index': 1001,
                    'line-height': '30px',
                    'opacity': params[el.id].opacity
                }).click(function(e) {
                    e.preventDefault();
                    $.transition(el);
                    $.transitionCall(el);
                }).mouseover(function() { $('#cs-navigation-' + el.id).show() });
            }
        }
        // set numerical navigation
        $.setnumericalNavigation = function(el) {
            if (images[el.id].length > 1) {  //added code to prevent showing 1 image navigation
                // image buttons
                $("<div id='cs-buttons-" + el.id + "' class='cs-buttons'></div>").appendTo($('#coin-slider-' + el.id));
               for (k = 1; k < images[el.id].length + 1; k++) {
                    $('#cs-buttons-' + el.id).append("<a href='#' class='cs-button-" + el.id + "' id='cs-button-" + el.id + "-" + k + "'>" + k + "</a>");
                }
                $.each($('.cs-button-' + el.id), function(i, item) {
                    $(item).click(function(e) {
                        $('.cs-button-' + el.id).removeClass('cs-active');
                        $('.cs-button-' + el.id).addClass('cs-inactive');
                        $(this).removeClass('cs-inactive');
                        $(this).addClass('cs-active');
                        e.preventDefault();
                        $.transition(el, i);
                        $.transitionCall(el);
                    })
                });

                $('#cs-navigation-' + el.id + ' a').mouseout(function() {
                    $('#cs-navigation-' + el.id).show();
                    params[el.id].pause = false;
                });

             }
    }

        // effects
    $.effect = function(el) {
        effA = ['random', 'swirl', 'rain', 'straight'];
        if (params[el.id].effect == '')
            eff = effA[Math.floor(Math.random() * (effA.length))];
        else
            eff = params[el.id].effect;

        order[el.id] = new Array();

        if (eff == 'random') {
            counter = 0;
            for (i = 1; i <= params[el.id].sph; i++) {
                for (j = 1; j <= params[el.id].spw; j++) {
                    order[el.id][counter] = i + '' + j;
                    counter++;
                }
            }
            $.random(order[el.id]);
        }

        if (eff == 'rain') {
            $.rain(el);
        }

        if (eff == 'swirl')
            $.swirl(el);

        if (eff == 'straight')
            $.straight(el);

        reverse[el.id] *= -1;
        if (reverse[el.id] > 0) {
            order[el.id].reverse();
        }

    }


    // shuffle array function
    $.random = function(arr) {

        var i = arr.length;
        if (i == 0) return false;
        while (--i) {
            var j = Math.floor(Math.random() * (i + 1));
            var tempi = arr[i];
            var tempj = arr[j];
            arr[i] = tempj;
            arr[j] = tempi;
        }
    }

    //swirl effect by milos popovic
    $.swirl = function(el) {

        var n = params[el.id].sph;
        var m = params[el.id].spw;

        var x = 1;
        var y = 1;
        var going = 0;
        var num = 0;
        var c = 0;

        var dowhile = true;

        while (dowhile) {

            num = (going == 0 || going == 2) ? m : n;

            for (i = 1; i <= num; i++) {

                order[el.id][c] = x + '' + y;
                c++;

                if (i != num) {
                    switch (going) {
                        case 0: y++; break;
                        case 1: x++; break;
                        case 2: y--; break;
                        case 3: x--; break;

                    }
                }
            }

            going = (going + 1) % 4;

            switch (going) {
                case 0: m--; y++; break;
                case 1: n--; x++; break;
                case 2: m--; y--; break;
                case 3: n--; x--; break;
            }

            check = $.max(n, m) - $.min(n, m);
            if (m <= check && n <= check)
                dowhile = false;

        }
    }

    // rain effect
    $.rain = function(el) {
        var n = params[el.id].sph;
        var m = params[el.id].spw;

        var c = 0;
        var to = to2 = from = 1;
        var dowhile = true;


        while (dowhile) {

            for (i = from; i <= to; i++) {
                order[el.id][c] = i + '' + parseInt(to2 - i + 1);
                c++;
            }

            to2++;

            if (to < n && to2 < m && n < m) {
                to++;
            }

            if (to < n && n >= m) {
                to++;
            }

            if (to2 > m) {
                from++;
            }

            if (from > to) dowhile = false;

        }

    }

    // straight effect
    $.straight = function(el) {
        counter = 0;
        for (i = 1; i <= params[el.id].sph; i++) {
            for (j = 1; j <= params[el.id].spw; j++) {
                order[el.id][counter] = i + '' + j;
                counter++;
            }

        }
    }

    $.min = function(n, m) {
        if (n > m) return m;
        else return n;
    }

    $.max = function(n, m) {
        if (n < m) return m;
        else return n;
    }

    this.each(
		function() { init(this); }
	);


};


// default values
$.fn.coinslider.defaults = {
    width: 565, // width of slider panel
    height: 290, // height of slider panel
    spw: 1, // squares per width
    sph: 1, // squares per height
    delay: 5000, // delay between images in ms
    sDelay: 10, // delay beetwen squares in ms
    opacity: 0.8, // opacity of title and navigation
    titleSpeed: 500, // speed of title appereance in ms
    effect: 'straight', // random, swirl, rain, straight
    navigation: true, // prev next and buttons
    links: true, // show images as links
    hoverPause: true, // pause on hover		
    numericalnav: true //numbered nav
};

})(jQuery);