// Animation for the header ghost and torch
(function($) {
  $(document).ready(function(e) {
    var DirectionEnum = {"left":0, "right":1}
    
    function torch() {
      this.element= $("<div />").attr("id", "animated-torch");
      this.element.css({
        "z-index" : 50,
        "position" : "absolute",
        "width": 19,
        "height" : 63,
        "display" : "none",
        "top" : 288,
        "left" : 706,
        "background-image" : "url('/sites/all/themes/ParanormalAdventures/images/flicker-sprite.png')",
        "background-position" : "0 0"
      });
      
      this.index = 0;
      this.spriteMultiplier = 19;
    }
    
    torch.prototype.ChangeSprite = function() {
      var newIndex;
      do {
        newIndex = Math.floor(Math.random()*7);
      } while (newIndex == this.index);
      
      this.index = newIndex;
      
      this.element.css({ "background-position" : (this.index * this.spriteMultiplier) + "px 0" });
    }
    
    function ghost() {
      this.element = $("<div />").attr("id", "animated-ghost");
      this.element.css({
         "z-index" : 50,
         "position" : "absolute",
         "width" : 35,
         "height" : 53,
         "display" : "none",
         "top" : 0,
         "left" : 0,
         "background-image" : "url('/sites/all/themes/ParanormalAdventures/images/ghost.png')",
         "background-position" : "0 0"
      });
      
      // which direction are we currently going in
      this.direction = DirectionEnum.right;
      
      this.remainVisibleFor = 80; // 80 frames
      this.frameCount = 0;
      this.readyToMove = false;
      this.fadingOut = false;
      
      // initial coordinates
      this.x = 0;
      this.y = 0;
    }
    
    ghost.prototype.ToggleDirection = function() {
      if (this.direction == DirectionEnum.right) {
        this.direction = DirectionEnum.left;
        this.element.css({ "background-position" : "0 53px" })
      } else {
        this.direction = DirectionEnum.right;
        this.element.css({ "background-position" : "0 0" })
      }
    }
    
    ghost.prototype.Move = function() {
      if (this.readyToMove == true) {
        if (this.direction == DirectionEnum.right) {
          this.x += 1;
          this.element.css( { left: this.x + "px" } );
        } else {
          this.x -= 1;
          this.element.css( { left: this.x + "px" } );
        }
        
        theGhost.frameCount++;
      }
    }
    
    ghost.prototype.Reset = function () {
      if (this.direction == DirectionEnum.right) {
        this.x = 430;
        this.y = 340;
      } else {
        this.x = 700;
        this.y = 500;
      }
      
      this.readyToMove = false;
      this.frameCount = 0;
      this.element.css({ "top" : this.y, "left" : this.x, "display" : "none"});
    }
    
    var theGhost = new ghost();
    var theTorch = new torch();
    var secondTorch = new torch();
    
    secondTorch.element = $("<div />").attr("id", "animated-torch2");
    secondTorch.element.css({
        "z-index" : 50,
        "position" : "absolute",
        "width": 39,
        "height" : 79,
        "display" : "none",
        "top" : 270,
        "left" : 790,
        "background-image" : "url('/sites/all/themes/ParanormalAdventures/images/flicker-sprite2.png')",
        "background-position" : "0 0"
    });
    
    secondTorch.spriteMultiplier = 39;
    
    $("#header").css({ "position" : "relative", "top" : 0 }).append(theGhost.element);
    $("#header").append(theTorch.element);
    $("#header").append(secondTorch.element);
    theGhost.Reset();
    
    // this gets called when the time has come to make the ghost do something, ie appear, move etc
    function animateGhost() {
      // reset everything if we've got to the end of the frame count
      if (theGhost.frameCount >= theGhost.remainVisibleFor) {
        theGhost.readyToMove = false;
        theGhost.fadingOut = false;
        theGhost.frameCount = 0;
        theGhost.ToggleDirection();
        setTimeout(animateGhost, 2000);
        return;
      }
      
      // we're invisible and we hit the 10% chance of the ghost doing something...
      if (theGhost.readyToMove == false) {
        var numb = Math.floor(Math.random()*11);
        if (numb < 1) {
          // if it's false then this is the first time in this animation sequence so we need to start fading in, if it's true, then we're already fading in so don't do it again
          if (theGhost.readyToMove == false) {
            $(theGhost.element).fadeIn(400);
            theGhost.readyToMove = true;
            setTimeout(animateGhost, 25);
          }
        } else {
          setTimeout(animateGhost, 2000);
        }
        return; // we don't want to move the ghost if it's not visible, nor do we want to move the ghost this round if it is
      }
      
      // keep moving the ghost until the frame count is up
      else if (theGhost.frameCount < theGhost.remainVisibleFor) {
        theGhost.Move();
        // when we get near the end of the sequence start fading the ghost back out again
        if (theGhost.frameCount > (theGhost.remainVisibleFor-20) && theGhost.fadingOut == false) {
          theGhost.fadingOut = true;
          $(theGhost.element).fadeOut(400);
        }
        setTimeout(animateGhost, 25);
      }
    }
    
    /*function ghostFadeCallback() {
      //if (!$(theGhost.element).is(":visible")) {
        theGhost.readyToMove = false;
        theGhost.fadingOut = false;
        theGhost.frameCount = 0;
        theGhost.ToggleDirection();
        setTimeout(animateGhost, 2000);
      //}
    }*/
    
    function torchFlicker() {
      if (!$(theTorch.element).is(":visible")) {
        $(theTorch.element).show();
      } else {
        theTorch.ChangeSprite();
      }
      setTimeout(torchFlicker, 80);
    }
    
    function torchFlicker2() {
      if (!$(secondTorch.element).is(":visible")) {
        $(secondTorch.element).show();
      } else {
        secondTorch.ChangeSprite();
      }
      setTimeout(torchFlicker2, 80);
    }
    
    function animate() {
      // the ghost doesn't look too good in IE 8 and lower
      if ( $.browser.msie ) {
        if (parseFloat($.browser.version) > 8.0) {
          setTimeout(animateGhost, 2000 + (Math.random() * 4000));
        }
      } else {
        setTimeout(animateGhost, 2000 + (Math.random() * 4000));
      }
      if ( $.browser.msie ) {
        if (parseFloat($.browser.version) > 6.0) {
          setTimeout(torchFlicker, 25);
          setTimeout(torchFlicker2, 25);
        }
      }
      else {
        setTimeout(torchFlicker, 25);
        setTimeout(torchFlicker2, 25);
      }
    }
    
    $(window).load(function () {
      //setTimeout(animate, 2000 + (Math.random() * 4000));
      animate();
    });
  });
})(jQuery);;
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