/**
 * 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();
            });
			

            // 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);
			
            $.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).hide();
            });
			
            $('#cs-title-'+el.id).mouseover(function(){
                $('#cs-navigation-'+el.id).show();
            });
		
            $('#cs-title-'+el.id).mouseout(function(){
                $('#cs-navigation-'+el.id).hide();
            });
			
            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+"-"+(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){
            // create prev and next
            $(el).append("<div id='cs-navigation-"+el.id+"'></div>");
            $('#cs-navigation-'+el.id).hide();
			
            $('#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()
            });
		
            // 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');
                    $(this).addClass('cs-active');
                    e.preventDefault();
                    $.transition(el,i);
                    $.transitionCall(el);
                })
            });
			
            $('#cs-navigation-'+el.id+' a').mouseout(function(){
                $('#cs-navigation-'+el.id).hide();
                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: 7, // squares per width
        sph: 5, // squares per height
        delay: 3000, // delay between images in ms
        sDelay: 30, // delay beetwen squares in ms
        opacity: 0.7, // opacity of title and navigation
        titleSpeed: 500, // speed of title appereance in ms
        effect: '', // random, swirl, rain, straight
        navigation: true, // prev next and buttons
        links : true, // show images as links
        hoverPause: true // pause on hover
    };
	
})(jQuery);