// -----------------------------------------------------------------------------------

var fileLoadingImage = "pic/loading.gif";
var fileBottomNavCloseImage = "pic/closelabel.gif";

var resizeSpeed = 7;  // controls the speed of the image resizing (1=slowest and 10=fastest)

var borderSize = 10;  //if you adjust the padding in the CSS, you will need to update this variable

// -----------------------------------------------------------------------------------

var imageArray = new Array;
var activeImage;

if(resizeSpeed > 10){ resizeSpeed = 10;}
if(resizeSpeed < 1){ resizeSpeed = 1;}
resizeDuration = (11 - resizeSpeed) * 0.15;

// -----------------------------------------------------------------------------------


Object.extend(Element, {
  getWidth: function(element) {
      element = $(element);
      return element.offsetWidth;
  },
  setWidth: function(element,w) {
      element = $(element);
      element.style.width = w +"px";
  },
  setHeight: function(element,h) {
      element = $(element);
      element.style.height = h +"px";
  },
  setTop: function(element,t) {
      element = $(element);
      element.style.top = t +"px";
  },
  setSrc: function(element,src) {
      element = $(element);
      element.src = src;
  },
  setHref: function(element,href) {
      element = $(element);
      element.href = href;
  },
  setInnerHTML: function(element,content) {
    element = $(element);
    element.innerHTML = content;
  }
});

// -----------------------------------------------------------------------------------

Array.prototype.removeDuplicates = function () {
  for(i = 1; i < this.length; i++){
    if(this[i][0] == this[i-1][0]){
      this.splice(i,1);
    }
  }
}

// -----------------------------------------------------------------------------------

Array.prototype.empty = function () {
  for(i = 0; i <= this.length; i++){
    this.shift();
  }
}


var Lightbox = Class.create();

Lightbox.prototype = {
  initialize: function() {
    if (!document.getElementsByTagName){ return; }
    var anchors = document.getElementsByTagName('a');

    for (var i=0; i<anchors.length; i++){
      var anchor = anchors[i];

      var relAttribute = String(anchor.getAttribute('rel'));

      if (anchor.getAttribute('href') && (relAttribute.toLowerCase().match('lightbox'))){
        anchor.onclick = function () {myLightbox.start(this); return false;}
      }
    }



    var objBody = document.getElementsByTagName("body").item(0);

    var objOverlay = document.createElement("div");
    objOverlay.setAttribute('id','overlay');
    objOverlay.style.display = 'none';
    objOverlay.onclick = function() { myLightbox.end(); return false; }
    objBody.appendChild(objOverlay);

    var objLightbox = document.createElement("div");
    objLightbox.setAttribute('id','lightbox');
    objLightbox.style.display = 'none';
    objBody.appendChild(objLightbox);

    var objOuterImageContainer = document.createElement("div");
    objOuterImageContainer.setAttribute('id','outerImageContainer');
    objLightbox.appendChild(objOuterImageContainer);

    var objImageContainer = document.createElement("div");
    objImageContainer.setAttribute('id','imageContainer');
    objOuterImageContainer.appendChild(objImageContainer);

    var objLightboxImage = document.createElement("img");
    objLightboxImage.setAttribute('id','lightboxImage');
    objImageContainer.appendChild(objLightboxImage);

    var objHoverNav = document.createElement("div");
    objHoverNav.setAttribute('id','hoverNav');
    objImageContainer.appendChild(objHoverNav);

    var objPrevLink = document.createElement("a");
    objPrevLink.setAttribute('id','prevLink');
    objPrevLink.setAttribute('href','#');
    objHoverNav.appendChild(objPrevLink);

    var objNextLink = document.createElement("a");
    objNextLink.setAttribute('id','nextLink');
    objNextLink.setAttribute('href','#');
    objHoverNav.appendChild(objNextLink);

    var objLoading = document.createElement("div");
    objLoading.setAttribute('id','loading');
    objImageContainer.appendChild(objLoading);

    var objLoadingLink = document.createElement("a");
    objLoadingLink.setAttribute('id','loadingLink');
    objLoadingLink.setAttribute('href','#');
    objLoadingLink.onclick = function() { myLightbox.end(); return false; }
    objLoading.appendChild(objLoadingLink);

    var objLoadingImage = document.createElement("img");
    objLoadingImage.setAttribute('src', fileLoadingImage);
    objLoadingLink.appendChild(objLoadingImage);

    var objImageDataContainer = document.createElement("div");
    objImageDataContainer.setAttribute('id','imageDataContainer');
    objImageDataContainer.className = 'clearfix';
    objLightbox.appendChild(objImageDataContainer);

    var objImageData = document.createElement("div");
    objImageData.setAttribute('id','imageData');
    objImageDataContainer.appendChild(objImageData);

    var objImageDetails = document.createElement("div");
    objImageDetails.setAttribute('id','imageDetails');
    objImageData.appendChild(objImageDetails);

    var objCaption = document.createElement("span");
    objCaption.setAttribute('id','caption');
    objImageDetails.appendChild(objCaption);

    var objNumberDisplay = document.createElement("span");
    objNumberDisplay.setAttribute('id','numberDisplay');
    objImageDetails.appendChild(objNumberDisplay);

    var objBottomNav = document.createElement("div");
    objBottomNav.setAttribute('id','bottomNav');
    objImageData.appendChild(objBottomNav);

    var objBottomNavCloseLink = document.createElement("a");
    objBottomNavCloseLink.setAttribute('id','bottomNavClose');
    objBottomNavCloseLink.setAttribute('href','#');
    objBottomNavCloseLink.onclick = function() { myLightbox.end(); return false; }
    objBottomNav.appendChild(objBottomNavCloseLink);

    var objBottomNavCloseImage = document.createElement("img");
    objBottomNavCloseImage.setAttribute('src', fileBottomNavCloseImage);
    objBottomNavCloseLink.appendChild(objBottomNavCloseImage);
  },


  start: function(imageLink) {

    hideSelectBoxes();

    var arrayPageSize = getPageSize();
    Element.setHeight('overlay', arrayPageSize[1]);
    new Effect.Appear('overlay', { duration: 0.2, from: 0.0, to: 0.8 });

    imageArray = [];
    imageNum = 0;

    if (!document.getElementsByTagName){ return; }
    var anchors = document.getElementsByTagName('a');

    if((imageLink.getAttribute('rel') == 'lightbox')){
      imageArray.push(new Array(imageLink.getAttribute('href'), imageLink.getAttribute('title')));
    } else {

      for (var i=0; i<anchors.length; i++){
        var anchor = anchors[i];
        if (anchor.getAttribute('href') && (anchor.getAttribute('rel') == imageLink.getAttribute('rel'))){
          imageArray.push(new Array(anchor.getAttribute('href'), anchor.getAttribute('title')));
        }
      }
      imageArray.removeDuplicates();
      while(imageArray[imageNum][0] != imageLink.getAttribute('href')) { imageNum++;}
    }

    var arrayPageSize = getPageSize();
    var arrayPageScroll = getPageScroll();
    var lightboxTop = arrayPageScroll[1] + (arrayPageSize[3] / 15);

    Element.setTop('lightbox', lightboxTop);
    Element.show('lightbox');

    this.changeImage(imageNum);
  },


  changeImage: function(imageNum) {

    activeImage = imageNum; // update global var

    Element.show('loading');
    Element.hide('lightboxImage');
    Element.hide('hoverNav');
    Element.hide('prevLink');
    Element.hide('nextLink');
    Element.hide('imageDataContainer');
    Element.hide('numberDisplay');

    imgPreloader = new Image();

    imgPreloader.onload=function(){
      Element.setSrc('lightboxImage', imageArray[activeImage][0]);
      myLightbox.resizeImageContainer(imgPreloader.width, imgPreloader.height);
    }
    imgPreloader.src = imageArray[activeImage][0];
  },

  resizeImageContainer: function( imgWidth, imgHeight) {

    this.wCur = Element.getWidth('outerImageContainer');
    this.hCur = Element.getHeight('outerImageContainer');

    this.xScale = ((imgWidth  + (borderSize * 2)) / this.wCur) * 100;
    this.yScale = ((imgHeight  + (borderSize * 2)) / this.hCur) * 100;

    wDiff = (this.wCur - borderSize * 2) - imgWidth;
    hDiff = (this.hCur - borderSize * 2) - imgHeight;

    if(!( hDiff == 0)){ new Effect.Scale('outerImageContainer', this.yScale, {scaleX: false, duration: resizeDuration, queue: 'front'}); }
    if(!( wDiff == 0)){ new Effect.Scale('outerImageContainer', this.xScale, {scaleY: false, delay: resizeDuration, duration: resizeDuration}); }

    if((hDiff == 0) && (wDiff == 0)){
      if (navigator.appVersion.indexOf("MSIE")!=-1){ pause(250); } else { pause(100);}
    }

    Element.setHeight('prevLink', imgHeight);
    Element.setHeight('nextLink', imgHeight);
    Element.setWidth( 'imageDataContainer', imgWidth + (borderSize * 2));

    this.showImage();
  },

  showImage: function(){
    Element.hide('loading');
    new Effect.Appear('lightboxImage', { duration: 0.5, queue: 'end', afterFinish: function(){  myLightbox.updateDetails(); } });
    this.preloadNeighborImages();
  },

  updateDetails: function() {

    Element.show('caption');
    Element.setInnerHTML( 'caption', imageArray[activeImage][1]);

// вывод номер фотоки 

    if(imageArray.length > 1){
      Element.show('numberDisplay');
      Element.setInnerHTML( 'numberDisplay', " " + eval(activeImage + 1) + " èç " + imageArray.length);
    }

    new Effect.Parallel(
      [ new Effect.SlideDown( 'imageDataContainer', { sync: true, duration: resizeDuration + 0.25, from: 0.0, to: 1.0 }),
        new Effect.Appear('imageDataContainer', { sync: true, duration: 1.0 }) ],
      { duration: 0.65, afterFinish: function() { myLightbox.updateNav();} }
    );
  },

  updateNav: function() {

    Element.show('hoverNav');

    if(activeImage != 0){
      Element.show('prevLink');
      document.getElementById('prevLink').onclick = function() {
        myLightbox.changeImage(activeImage - 1); return false;
      }
    }

    if(activeImage != (imageArray.length - 1)){
      Element.show('nextLink');
      document.getElementById('nextLink').onclick = function() {
        myLightbox.changeImage(activeImage + 1); return false;
      }
    }

    this.enableKeyboardNav();
  },

  enableKeyboardNav: function() {
    document.onkeydown = this.keyboardAction;
  },

  disableKeyboardNav: function() {
    document.onkeydown = '';
  },

  keyboardAction: function(e) {
    if (e == null) { // ie
      keycode = event.keyCode;
    } else { // mozilla
      keycode = e.which;
    }

    key = String.fromCharCode(keycode).toLowerCase();

    if((key == 'x') || (key == 'o') || (key == 'c') || keycode == Event.KEY_ESC){ // close lightbox
      myLightbox.end();
    } else if(key == 'p' || keycode == Event.KEY_LEFT){  // display previous image
      if(activeImage != 0){
        myLightbox.disableKeyboardNav();
        myLightbox.changeImage(activeImage - 1);
      }
    } else if(key == 'n' || keycode == Event.KEY_RIGHT){  // display next image
      if(activeImage != (imageArray.length - 1)){
        myLightbox.disableKeyboardNav();
        myLightbox.changeImage(activeImage + 1);
      }
    }


  },

  preloadNeighborImages: function(){

    if((imageArray.length - 1) > activeImage){
      preloadNextImage = new Image();
      preloadNextImage.src = imageArray[activeImage + 1][0];
    }
    if(activeImage > 0){
      preloadPrevImage = new Image();
      preloadPrevImage.src = imageArray[activeImage - 1][0];
    }

  },

  end: function() {
    this.disableKeyboardNav();
    Element.hide('lightbox');
    new Effect.Fade('overlay', { duration: 0.2});
    showSelectBoxes();
  }
}

// -----------------------------------------------------------------------------------

function getPageScroll(){

  var yScroll;

  if (self.pageYOffset) {
    yScroll = self.pageYOffset;
  } else if (document.documentElement && document.documentElement.scrollTop){  // Explorer 6 Strict
    yScroll = document.documentElement.scrollTop;
  } else if (document.body) {// all other Explorers
    yScroll = document.body.scrollTop;
  }

  arrayPageScroll = new Array('',yScroll)
  return arrayPageScroll;
}

// -----------------------------------------------------------------------------------

function getPageSize(){

  var xScroll, yScroll;

  if (window.innerHeight && window.scrollMaxY) {
    xScroll = document.body.scrollWidth;
    yScroll = window.innerHeight + window.scrollMaxY;
  } else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
    xScroll = document.body.scrollWidth;
    yScroll = document.body.scrollHeight;
  } else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
    xScroll = document.body.offsetWidth;
    yScroll = document.body.offsetHeight;
  }

  var windowWidth, windowHeight;
  if (self.innerHeight) { // all except Explorer
    windowWidth = self.innerWidth;
    windowHeight = self.innerHeight;
  } else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
    windowWidth = document.documentElement.clientWidth;
    windowHeight = document.documentElement.clientHeight;
  } else if (document.body) { // other Explorers
    windowWidth = document.body.clientWidth;
    windowHeight = document.body.clientHeight;
  }

  if(yScroll < windowHeight){
    pageHeight = windowHeight;
  } else {
    pageHeight = yScroll;
  }

  if(xScroll < windowWidth){
    pageWidth = windowWidth;
  } else {
    pageWidth = xScroll;
  }


  arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight)
  return arrayPageSize;
}

// -----------------------------------------------------------------------------------

function getKey(e){
  if (e == null) { // ie
    keycode = event.keyCode;
  } else { // mozilla
    keycode = e.which;
  }
  key = String.fromCharCode(keycode).toLowerCase();

  if(key == 'x'){
  }
}

// -----------------------------------------------------------------------------------

function listenKey () { document.onkeypress = getKey; }

// ---------------------------------------------------

function showSelectBoxes(){
  selects = document.getElementsByTagName("select");
  for (i = 0; i != selects.length; i++) {
    selects[i].style.visibility = "visible";
  }
}

// ---------------------------------------------------

function hideSelectBoxes(){
  selects = document.getElementsByTagName("select");
  for (i = 0; i != selects.length; i++) {
    selects[i].style.visibility = "hidden";
  }
}

// ---------------------------------------------------

function pause(numberMillis) {
  var now = new Date();
  var exitTime = now.getTime() + numberMillis;
  while (true) {
    now = new Date();
    if (now.getTime() > exitTime)
      return;
  }
}

// ---------------------------------------------------

function initLightbox() { myLightbox = new Lightbox(); }
Event.observe(window, 'load', initLightbox, false);