/*
 * jQuery Touchable
 *
 * Simplified BSD License (@see License)
 * @author        Gregor Schwab
 * @copyright     (c) 2010 Gregor Schwab
 * Usage Command Line: $(elem).Touchable() (@see Readme.md)
 * @version 0.0.4
 * @requires jQuery
 */


(function($) {

   $.fn.Touchable = function(conf) {
       return this.each(function() {       
       var t= $(this).data['Touchable']=new Touchable(this, conf);
       return t;
     });
   }
   $.fn.newHover = function(fn1, fn2, disableHover) {
       return this.each(function() {
         $(this).bind('newHoverIn', fn1).bind('newHoverOut', fn2);
     });
   }  
   $.fn.newHover2 = function(fn1, fn2) {
       return this.each(function() {
         $(this).bind('newHoverIn2', fn1).bind('newHoverOut2', fn2);
     });
   }  

    $.Touchable=Touchable;   
    
   /**
    * @constructor
    */  

   function Touchable(elem, conf)
   {
 
     this.logging=false; //set to false to disabele logging gets overwritten by conf see below
     var log=function(a){if(self.logging && (typeof console !== 'undefined')){
        console.log(Array.prototype.slice.call(arguments));}
        }; //private logging function
     
     this.elem=elem;    
     this.$elem=$(elem);
     this.is_doubleTap=false;
     this.is_currentlyTouching=false;
     this.isOneFingerGesture = false;

     this.startTouch={x:0,y:0};
     this.currentTouch={x:0,y:0};      
     this.previousTouch={x:0,y:0};
     this.currentDelta={x:0,y:0};//measured from previous move event
     this.currentStartDelta={x:0,y:0}; //measured from start   
     this.currentPosition={x:0,y:0};
     this.doubleTapTimer=null, this.longTapTimer=null;

     var self=this;

     if (typeof conf!=='undefined'){
       if(typeof conf.logging!=='undefined'){this.logging=conf.logging;}   
     }     
     //make IE happy
     var addEventListener=elem.addEventListener||elem.attachEvent
     var removeEventListener = elem.removeEventListener||elem.detachEvent   
     //add touchstart eventlistener    
     addEventListener.call(elem, 'touchstart', function(){self.$elem.trigger('touchstart')}, true);    
     addEventListener.call(elem, 'touchend', function(){self.$elem.trigger('touchend')}, false);
     addEventListener.call(elem, 'touchmove', function(){self.$elem.trigger('touchmove')}, false);   

     addEventListener.call(elem, 'touchstart', touchstart, false);    
     this.$elem.mousedown(touchstart);

     function touchstart (e) {
       if(typeof e.touches!== "undefined")
         {
         log('Touchable Touchstart touches length ' + e.touches.length);          
         //only handle 1 or 2 touches
   			if (e.touches.length !== 1 && e.touches.length !== 2) {
   				return false;
   			}
   			if (self.isCurrentlyTouching) {
   				return false;
   			}


   			self.isCurrentlyTouching = true;
   			if (e.touches.length == 1) { //1 finger
   				self.isOneFingerGesture = true;
   				//init pos
   				self.startTouch.x = self.previousTouch.x = e.touches[0].clientX;
   				self.startTouch.y = self.previousTouch.y = e.touches[0].clientY;
   			} else if (e.touches.length == 2) { //two fingers
   				self.isOneFingerGesture = false;
   				if (e.touches[0].clientY > e.touches[1].clientY) {//0 is lower
   					self.startTouch.x = self.previousTouch.x = e.touches[0].clientX;
   					self.startTouch.y = self.previousTouch.y = e.touches[0].clientY;
   				} else {
   					self.startTouch.x = self.previousTouch.x = self.touches[1].clientX;
   					self.startTouch.y = self.previousTouch.y = self.touches[1].clientY;    					
   				}
   			} 

   				addEventListener.call(document, 'touchmove', touchmove, false);
   				addEventListener.call(document, 'touchend', touchend, false);    			
  		}else{
         log('Touchable Touchstart touches length ' + e.pageX + ' ' + e.pageY);			  
   				self.startTouch.x = self.previousTouch.x = e.pageX;
   				self.startTouch.y = self.previousTouch.y = e.pageY; 
   				$(document).mousemove(touchmove);
   				$(document).mouseup(touchend);  							  
  		}
  		//don't shallow links, but all the rest
  		self.target=e.target;//some browser loose the info here
      self.currentTarget=e.currentTarget;//some browser loose the info here so save it for later
      var x=self.startTouch.x; var y=self.startTouch.y;  
      self.hitTarget = ( document.elementFromPoint ) ? (document.elementFromPoint(x, y)):'';  
  		//if (self.hitTarget && !(self.hitTarget instanceof HTMLAnchorElement) &&!(e.currentTarget instanceof HTMLAnchorElement)) 
  		  e.preventDefault()


  		//setup double tapping 
  		if (!self.inDoubleTap) {
  			self.inDoubleTap = true;
  			//setup a timer
  			self.doubleTapTimer = setTimeout(function() {
  				self.inDoubleTap = false;
  			}, 500);
  		} else {//we are double tapping
  			// call function to run if double-tap
  			log('Touchable doubleTap');
  			self.$elem.trigger('doubleTap', self); //trigger a doubleTap
  			//reset doubleTap state
  			clearTimeout(self.doubleTapTimer);
  			self.inDoubleTap = false;			     
       }  			
  		//setup long tapping and long mousedown
  		//setup a timer
  	  self.longTapTimer = setTimeout(function() {
  	    log('Touchable longTap'/*, self.hitTarget, self.target, self.currentTarget, self.elem*/);
  		  $(self.elem).trigger('longTap', self); //trigger a longTap
  		}, 1000);

  	  log('Touchable Tap');				  			
  		$(self.elem).trigger('tap', self); //trigger a tap
  		$(self.elem).trigger('touchablestart', self); //trigger a tap			


  	}


  	//called on iPad/iPhone when touches started and the finger is moved
  	function touchmove(e) {

  	  if (typeof e.touches !== 'undefined'){
       log('Touchable Touchsmove touches length ' + e.touches.length);              		    
   			if (e.touches.length !== 1 && e.touches.length !== 2) //use touches to track all fingers on the screen currently (also the ones not in the pane) if there are more than 2 its a gesture
   				return false;

         //1 finger
   			if (e.touches.length == 1 || self.isOneFingerGesture) {//we ignore the second finger if we are already in movement
   				self.currentTouch.x = e.touches[0].clientX;
   				self.currentTouch.y = e.touches[0].clientY;
           //2 finger
   			} else if (self.touches.length == 2 && !self.isOneFingerGesture) {//two fingers move , take the upper finger as reference
   				if (e.touches[0].clientY > e.touches[1].clientY) {//0 is lower
   					self.currentTouch.x = e.touches[0].clientX;
   					self.currentTouch.y = e.touches[0].clientY;
   				} else {
   					self.currentTouch.x = e.touches[1].clientX;
   					self.currentTouch.y = e.touches[1].clientY;
   				}
   			}
  		}else{
  			self.currentTouch.x = e.pageX;
  			self.currentTouch.y = e.pageY;  			  
  		}
  		//if we are moving stop any css animations currently running
  		$(self.elem).removeClass('webkitAnimate');
  		//e.preventDefault();

  		self.currentDelta.x = (self.currentTouch.x - self.previousTouch.x);///s.currentScale;
  		self.currentDelta.y = (self.currentTouch.y - self.previousTouch.y);///s.currentScale;
  		self.currentStartDelta.x = (self.currentTouch.x - self.startTouch.x);///s.currentScale;
  		self.currentStartDelta.y = (self.currentTouch.y - self.startTouch.y);///s.currentScale;
  		//just for the records (accumulation)
  		self.currentPosition.x = self.currentPosition.x + self.currentDelta.x;
  		self.currentPosition.y = self.currentPosition.y + self.currentDelta.y;
  		//reset the start position for the next delta
  		self.previousTouch.x = self.currentTouch.x;
  		self.previousTouch.y = self.currentTouch.y;
       log('Touchable Touchablemove self e.target' + e.target + 'e.currentTarget '+ e.currentTarget +' x:'+ self.currentStartDelta.x);      
       //Target handling      
       self.target=e.target;//some browser loose the info here
       self.currentTarget=e.currentTarget;//some browser loose the info here so save it for later
      var x=self.currentTouch.x; var y=self.currentTouch.y;  
       self.hitTarget = ( document.elementFromPoint ) ? (document.elementFromPoint(x, y)):'';           
       $(self.elem).trigger('touchablemove', self);

  		//clear the long tap timer on mousemove
   		if (self.longTapTimer) clearTimeout(self.longTapTimer);
  	}		
     function touchend(e) {
       if (typeof e.touches !== 'undefined'){
   			if (e.targetTouches.length > 0)
   				return false;
     		removeEventListener.call(self.elem, 'touchmove', touchmove, true);
     		removeEventListener.call(self.elem, 'touchend', touchend, true);    				
  		}else{
     		$(document).unbind('mousemove',touchmove);
     		$(document).unbind('mouseup',touchend);      					  
  		}

  		//e.preventDefault();
  		self.isCurrentlyTouching = false;
  		//clear the long tap timer on mouseup
   		if (self.longTapTimer) clearTimeout(self.longTapTimer);  			
       log('Touchable Touchend self ' + self.currentStartDelta.x);              			
       $(self.elem).trigger('touchableend', self);
  		 log('Touchable: touchableend');
       $(self.hitTarget).trigger('click', self);//trigger a click on the hittarget cause on iPad/Mobile Safari preventdefault seems to shallow click events 
  		 log('Touchable: Hittarget click');  		 

  	}      
   }
})(jQuery);//end closure