/**
 * jQuery Roundabout - v1.1
 * http://fredhq.com/projects/roundabout/
 *
 * Moves list-items of enabled ordered and unordered lists long
 * a chosen path. Includes the default "lazySusan" path, that
 * moves items long a spinning turntable.
 *
 * Terms of Use // jQuery Roundabout
 *
 * Open source under the BSD license
 *
 * Copyright (c) 2010, Fred LeBlanc
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   - Redistributions in binary form must reproduce the above
 *     copyright notice, this list of conditions and the following
 *     disclaimer in the documentation and/or other materials provided
 *     with the distribution.
 *   - Neither the name of the author nor the names of its contributors
 *     may be used to endorse or promote products derived from this
 *     software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

jQuery.extend({
    roundabout_shape:{
        def:'lazySusan',
        lazySusan:function(r,a,t){
            return{
                x:Math.sin(r+a),
                y:(Math.sin(r+3*Math.PI/2+a)/8)*t,
                z:(Math.cos(r+a)+1)/2,
                scale:(Math.sin(r+Math.PI/2+a)/2)+0.5
                }
            }
    }
});
jQuery.fn.roundabout=function(){
    var options=(typeof arguments[0]!='object')?{}:arguments[0];
    options={
        bearing:(typeof options.bearing=='undefined')?0.0:jQuery.roundabout_toFloat(options.bearing%360.0),
        tilt:(typeof options.tilt=='undefined')?0.0:jQuery.roundabout_toFloat(options.tilt),
        minZ:(typeof options.minZ=='undefined')?100:parseInt(options.minZ,10),
        maxZ:(typeof options.maxZ=='undefined')?400:parseInt(options.maxZ,10),
        minOpacity:(typeof options.minOpacity=='undefined')?0.40:jQuery.roundabout_toFloat(options.minOpacity),
        maxOpacity:(typeof options.maxOpacity=='undefined')?1.00:jQuery.roundabout_toFloat(options.maxOpacity),
        minScale:(typeof options.minScale=='undefined')?0.40:jQuery.roundabout_toFloat(options.minScale),
        maxScale:(typeof options.maxScale=='undefined')?1.00:jQuery.roundabout_toFloat(options.maxScale),
        duration:(typeof options.duration=='undefined')?600:parseInt(options.duration,10),
        btnNext:options.btnNext||null,
        btnPrev:options.btnPrev||null,
        easing:options.easing||'swing',
        clickToFocus:(options.clickToFocus!==false),
        focusBearing:(typeof options.focusBearing=='undefined')?0.0:jQuery.roundabout_toFloat(options.focusBearing%360.0),
        shape:options.shape||'lazySusan',
        debug:options.debug||false,
        childSelector:options.childSelector||'li',
        startingChild:(typeof options.startingChild=='undefined')?null:parseInt(options.startingChild,10),
        reflect:(typeof options.reflect=='undefined'||options.reflect===false)?false:true
        };

    this.each(function(i){
        var ref=jQuery(this);
        var period=jQuery.roundabout_toFloat(360.0/ref.children(options.childSelector).length);
        var startingBearing=(options.startingChild===null)?options.bearing:options.startingChild*period;
        ref.addClass('roundabout-holder').css('padding',0).css('position','relative').css('z-index',options.minZ);
        ref.data('roundabout',{
            'bearing':startingBearing,
            'tilt':options.tilt,
            'minZ':options.minZ,
            'maxZ':options.maxZ,
            'minOpacity':options.minOpacity,
            'maxOpacity':options.maxOpacity,
            'minScale':options.minScale,
            'maxScale':options.maxScale,
            'duration':options.duration,
            'easing':options.easing,
            'clickToFocus':options.clickToFocus,
            'focusBearing':options.focusBearing,
            'animating':0,
            'childInFocus':-1,
            'shape':options.shape,
            'period':period,
            'debug':options.debug,
            'childSelector':options.childSelector,
            'reflect':options.reflect
            });
        if(options.clickToFocus===true){
            ref.children(options.childSelector).each(function(i){
                jQuery(this).click(function(e){
                    var degrees=(options.reflect===true)?360.0-(period*i):period*i;
                    degrees=jQuery.roundabout_toFloat(degrees);
                    if(!jQuery.roundabout_isInFocus(ref,degrees)){
                        e.preventDefault();
                        if(ref.data('roundabout').animating===0){
                            ref.roundabout_animateAngleToFocus(degrees)
                            }
                            return false
                        }
                    })
            })
        }
        if(options.btnNext){
        jQuery(options.btnNext).bind('click.roundabout',function(e){
            e.preventDefault();
            if(ref.data('roundabout').animating===0){
                ref.roundabout_animateToNextChild()
                }
                return false
            })
        }
        if(options.btnPrev){
        jQuery(options.btnPrev).bind('click.roundabout',function(e){
            e.preventDefault();
            if(ref.data('roundabout').animating===0){
                ref.roundabout_animateToPreviousChild()
                }
                return false
            })
        }
    });
this.roundabout_startChildren();
if(typeof arguments[1]==='function'){
    var callback=arguments[1],ref=this;
    setTimeout(function(){
        callback(ref)
        },0)
    }
    return this
};

jQuery.fn.roundabout_startChildren=function(){
    this.each(function(i){
        var ref=jQuery(this);
        var data=ref.data('roundabout');
        var children=ref.children(data.childSelector);
        children.each(function(i){
            var degrees=(data.reflect===true)?360.0-(data.period*i):data.period*i;
            jQuery(this).addClass('roundabout-moveable-item').css('position','absolute');
            jQuery(this).data('roundabout',{
                'startWidth':jQuery(this).width(),
                'startHeight':jQuery(this).height(),
                'startFontSize':parseInt(jQuery(this).css('font-size'),10),
                'degrees':degrees
            })
            });
        ref.roundabout_updateChildPositions()
        });
    return this
    };

jQuery.fn.roundabout_setTilt=function(newTilt){
    this.each(function(i){
        jQuery(this).data('roundabout').tilt=newTilt;
        jQuery(this).roundabout_updateChildPositions()
        });
    if(typeof arguments[1]==='function'){
        var callback=arguments[1],ref=this;
        setTimeout(function(){
            callback(ref)
            },0)
        }
        return this
    };

jQuery.fn.roundabout_setBearing=function(newBearing){
    this.each(function(i){
        jQuery(this).data('roundabout').bearing=jQuery.roundabout_toFloat(newBearing%360,2);
        jQuery(this).roundabout_updateChildPositions()
        });
    if(typeof arguments[1]==='function'){
        var callback=arguments[1],ref=this;
        setTimeout(function(){
            callback(ref)
            },0)
        }
        return this
    };

jQuery.fn.roundabout_adjustBearing=function(delta){
    delta=jQuery.roundabout_toFloat(delta);
    if(delta!==0){
        this.each(function(i){
            jQuery(this).data('roundabout').bearing=jQuery.roundabout_getBearing(jQuery(this))+delta;
            jQuery(this).roundabout_updateChildPositions()
            })
        }
        if(typeof arguments[1]==='function'){
        var callback=arguments[1],ref=this;
        setTimeout(function(){
            callback(ref)
            },0)
        }
        return this
    };

jQuery.fn.roundabout_adjustTilt=function(delta){
    delta=jQuery.roundabout_toFloat(delta);
    if(delta!==0){
        this.each(function(i){
            jQuery(this).data('roundabout').tilt=jQuery.roundabout_toFloat(jQuery(this).roundabout_get('tilt')+delta);
            jQuery(this).roundabout_updateChildPositions()
            })
        }
        if(typeof arguments[1]==='function'){
        var callback=arguments[1],ref=this;
        setTimeout(function(){
            callback(ref)
            },0)
        }
        return this
    };

jQuery.fn.roundabout_animateToBearing=function(bearing){
    bearing=jQuery.roundabout_toFloat(bearing);
    var currentTime=new Date();
    var duration=(typeof arguments[1]=='undefined')?null:arguments[1];
    var easingType=(typeof arguments[2]=='undefined')?null:arguments[2];
    var passedData=(typeof arguments[3]!=='object')?null:arguments[3];
    this.each(function(i){
        var ref=jQuery(this),data=ref.data('roundabout'),timer,easingFn,newBearing;
        var thisDuration=(duration===null)?data.duration:duration;
        var thisEasingType=(easingType!==null)?easingType:data.easing||'swing';
        if(passedData===null){
            passedData={
                timerStart:currentTime,
                start:jQuery.roundabout_getBearing(ref),
                totalTime:thisDuration
            }
        }
        timer=currentTime-passedData.timerStart;
    if(timer<thisDuration){
        data.animating=1;
        if(typeof jQuery.easing.def=='string'){
            easingFn=jQuery.easing[thisEasingType]||jQuery.easing[jQuery.easing.def];
            newBearing=easingFn(null,timer,passedData.start,bearing-passedData.start,passedData.totalTime)
            }else{
            newBearing=jQuery.easing[thisEasingType]((timer/passedData.totalTime),timer,passedData.start,bearing-passedData.start,passedData.totalTime)
            }
            ref.roundabout_setBearing(newBearing,function(){
            ref.roundabout_animateToBearing(bearing,thisDuration,thisEasingType,passedData)
            })
        }else{
        bearing=(bearing<0)?bearing+360:bearing%360;
        data.animating=0;
        ref.roundabout_setBearing(bearing)
        }
    });
return this
};

jQuery.fn.roundabout_animateToDelta=function(delta){
    var duration=arguments[1],easing=arguments[2];
    this.each(function(i){
        delta=jQuery.roundabout_getBearing(jQuery(this))+jQuery.roundabout_toFloat(delta);
        jQuery(this).roundabout_animateToBearing(delta,duration,easing)
        });
    return this
    };

jQuery.fn.roundabout_animateToChild=function(childPos){
    var duration=arguments[1],easing=arguments[2];
    this.each(function(i){
        var ref=jQuery(this),data=ref.data('roundabout');
        if(data.childInFocus!==childPos&&data.animating===0){
            var child=jQuery(ref.children(data.childSelector)[childPos]);
            ref.roundabout_animateAngleToFocus(child.data('roundabout').degrees,duration,easing)
            }
        });
return this
};

jQuery.fn.roundabout_animateToNearbyChild=function(passedArgs,which){
    var duration=passedArgs[0],easing=passedArgs[1];
    this.each(function(i){
        var data=jQuery(this).data('roundabout');
        var bearing=jQuery.roundabout_toFloat(360.0-jQuery.roundabout_getBearing(jQuery(this)));
        var period=data.period,j=0,range;
        var reflect=data.reflect;
        var length=jQuery(this).children(data.childSelector).length;
        bearing=(reflect===true)?bearing%360.0:bearing;
        if(data.animating===0){
            if((reflect===false&&which==='next')||(reflect===true&&which!=='next')){
                bearing=(bearing===0)?360:bearing;
                while(true&&j<length){
                    range={
                        lower:jQuery.roundabout_toFloat(period*j),
                        upper:jQuery.roundabout_toFloat(period*(j+1))
                        };

                    range.upper=(j==length-1)?360.0:range.upper;
                    if(bearing<=range.upper&&bearing>range.lower){
                        jQuery(this).roundabout_animateToDelta(bearing-range.lower,duration,easing);
                        break
                    }
                    j++
                }
            }else{
            while(true){
                range={
                    lower:jQuery.roundabout_toFloat(period*j),
                    upper:jQuery.roundabout_toFloat(period*(j+1))
                    };

                range.upper=(j==length-1)?360.0:range.upper;
                if(bearing>=range.lower&&bearing<range.upper){
                    jQuery(this).roundabout_animateToDelta(bearing-range.upper,duration,easing);
                    break
                }
                j++
            }
        }
    }
});
return this
};

jQuery.fn.roundabout_animateToNextChild=function(){
    return this.roundabout_animateToNearbyChild(arguments,'next')
    };

jQuery.fn.roundabout_animateToPreviousChild=function(){
    return this.roundabout_animateToNearbyChild(arguments,'previous')
    };

jQuery.fn.roundabout_animateAngleToFocus=function(target){
    var duration=arguments[1],easing=arguments[2];
    this.each(function(i){
        var delta=jQuery.roundabout_getBearing(jQuery(this))-target;
        delta=(Math.abs(360.0-delta)<Math.abs(0.0-delta))?360.0-delta:0.0-delta;
        delta=(delta>180)?-(360.0-delta):delta;
        if(delta!==0){
            jQuery(this).roundabout_animateToDelta(delta,duration,easing)
            }
        });
return this
};

jQuery.fn.roundabout_updateChildPositions=function(){
    this.each(function(i){
        var ref=jQuery(this),data=ref.data('roundabout');
        var inFocus=-1;
        var info={
            bearing:jQuery.roundabout_getBearing(ref),
            tilt:data.tilt,
            stage:{
                width:Math.floor(ref.width()*0.9),
                height:Math.floor(ref.height()*0.9)
                },
            animating:data.animating,
            inFocus:data.childInFocus,
            focusBearingRad:jQuery.roundabout_degToRad(data.focusBearing),
            shape:jQuery.roundabout_shape[data.shape]||jQuery.roundabout_shape[jQuery.roundabout_shape.def]
            };

        info.midStage={
            width:info.stage.width/2,
            height:info.stage.height/2
            };

        info.nudge={
            width:info.midStage.width+info.stage.width*0.05,
            height:info.midStage.height+info.stage.height*0.05
            };

        info.zValues={
            min:data.minZ,
            max:data.maxZ,
            diff:data.maxZ-data.minZ
            };

        info.opacity={
            min:data.minOpacity,
            max:data.maxOpacity,
            diff:data.maxOpacity-data.minOpacity
            };

        info.scale={
            min:data.minScale,
            max:data.maxScale,
            diff:data.maxScale-data.minScale
            };

        ref.children(data.childSelector).each(function(i){
            if(jQuery.roundabout_updateChildPosition(jQuery(this),ref,info,i)&&info.animating===0){
                inFocus=i;
                jQuery(this).addClass('roundabout-in-focus')
                }else{
                jQuery(this).removeClass('roundabout-in-focus')
                }
            });
    if(inFocus!==info.inFocus){
        jQuery.roundabout_triggerEvent(ref,info.inFocus,'blur');
        if(inFocus!==-1){
            jQuery.roundabout_triggerEvent(ref,inFocus,'focus')
            }
            data.childInFocus=inFocus
        }
    });
return this
};

jQuery.roundabout_getBearing=function(el){
    return jQuery.roundabout_toFloat(el.data('roundabout').bearing)%360
    };

jQuery.roundabout_degToRad=function(degrees){
    return(degrees%360.0)*Math.PI/180.0
    };

jQuery.roundabout_isInFocus=function(el,target){
    return(jQuery.roundabout_getBearing(el)%360===(target%360))
    };

jQuery.roundabout_triggerEvent=function(el,child,eventType){
    return(child<0)?this:jQuery(el.children(el.data('roundabout').childSelector)[child]).trigger(eventType)
    };

jQuery.roundabout_toFloat=function(number){
    number=Math.round(parseFloat(number)*1000)/1000;
    return parseFloat(number.toFixed(2))
    };

jQuery.roundabout_updateChildPosition=function(child,container,info,childPos){
    var ref=jQuery(child),data=ref.data('roundabout'),out=[];
    var rad=jQuery.roundabout_degToRad((360.0-ref.data('roundabout').degrees)+info.bearing);
    while(rad<0){
        rad=rad+Math.PI*2
        }while(rad>Math.PI*2){
        rad=rad-Math.PI*2
        }
        var factors=info.shape(rad,info.focusBearingRad,info.tilt);
    factors.scale=(factors.scale>1)?1:factors.scale;
    factors.adjustedScale=(info.scale.min+(info.scale.diff*factors.scale)).toFixed(4);
    factors.width=(factors.adjustedScale*data.startWidth).toFixed(4);
    factors.height=(factors.adjustedScale*data.startHeight).toFixed(4);
    ref.css('left',((factors.x*info.midStage.width+info.nudge.width)-factors.width/2.0).toFixed(1)+'px').css('top',((factors.y*info.midStage.height+info.nudge.height)-factors.height/2.0).toFixed(1)+'px').css('width',factors.width+'px').css('height',factors.height+'px').css('opacity',(info.opacity.min+(info.opacity.diff*factors.scale)).toFixed(2)).css('z-index',Math.round(info.zValues.min+(info.zValues.diff*factors.z))).css('font-size',(factors.adjustedScale*data.startFontSize).toFixed(2)+'px').attr('current-scale',factors.adjustedScale);
    if(container.data('roundabout').debug===true){
        out.push('<div style="font-weight: normal; font-size: 10px; padding: 2px; width: '+ref.css('width')+'; background-color: #ffc;">');
        out.push('<strong style="font-size: 12px; white-space: nowrap;">Child '+childPos+'</strong><br />');
        out.push('<strong>left:</strong> '+ref.css('left')+'<br /><strong>top:</strong> '+ref.css('top')+'<br />');
        out.push('<strong>width:</strong> '+ref.css('width')+'<br /><strong>opacity:</strong> '+ref.css('opacity')+'<br />');
        out.push('<strong>z-index:</strong> '+ref.css('z-index')+'<br /><strong>font-size:</strong> '+ref.css('font-size')+'<br />');
        out.push('<strong>scale:</strong> '+ref.attr('current-scale'));
        out.push('</div>');
        ref.html(out.join(''))
        }
        return jQuery.roundabout_isInFocus(container,ref.data('roundabout').degrees)
    };