/**
 * SqueezeBox - Expandable Lightbox
 *
 * Allows to open various content as modal,
 * centered and animated box.
 *
 * Inspired by
 *  ... Lokesh Dhakar - The original Lightbox v2
 *  ... Cody Lindley  - ThickBox
 *
 * @version   1.0rc1
 *
 * @license   MIT-style license
 * @author    Harald Kirschner <mail [at] digitarald.de>
 * @copyright Author
 */
var SqueezeBox = {

  presets: {
    size: {x: 600, y: 450},
    sizeLoading: {x: 200, y: 150},
    marginInner: {x: 20, y: 20},
    marginImage: {x: 150, y: 200},
    handler: false,
    adopt: null,
    closeWithOverlay: true,
    zIndex: 65555,
    overlayOpacity: 0.7,
    classWindow: '',
    classOverlay: '',
    disableFx: false,
    onOpen: Class.empty,
    onClose: Class.empty,
    onUpdate: Class.empty,
    onResize: Class.empty,
    onMove: Class.empty,
    onShow: Class.empty,
    onHide: Class.empty,
    fxOverlayDuration: 250,
    fxResizeDuration: 750,
    fxContentDuration: 250,
    ajaxOptions: {}
  },

  initialize: function(options) {
    if (this.options) return this;
    this.presets = $merge(this.presets, options)
    this.setOptions(this.presets);
    this.build();
    this.listeners = {
      window: this.reposition.bind(this, [null]),
      close: this.close.bind(this),
      key: this.onkeypress.bind(this)};
    this.isOpen = this.isLoading = false;
    this.window.close = this.listeners.close;
    return this;
  },

  build: function() {
    this.overlay = new Element('div', {
      id: 'sbox-overlay',
      styles: {
        display: 'none',
        zIndex: this.options.zIndex
      }
    });
    this.content = new Element('div', {
      id: 'sbox-content'
    });
    this.btnClose = new Element('a', {
      id: 'sbox-btn-close',
      href: '#'
    });
    this.window = new Element('div', {
      id: 'sbox-window',
      styles: {
        display: 'none',
        zIndex: this.options.zIndex + 2
      }
    }).adopt(this.btnClose, this.content);

    if (!window.ie6) {
      this.overlay.setStyles({
        position: 'fixed',
        top: 0,
        left: 0
      });
      this.window.setStyles({
        position: 'fixed',
        top: '50%',
        left: '50%'
      });
    } else {
      this.overlay.style.setExpression('marginTop', 'document.documentElement.scrollTop + "px"');
      this.window.style.setExpression('marginTop', '0 - parseInt(this.offsetHeight / 2) + document.documentElement.scrollTop + "px"');

      this.overlay.setStyles({
        position: 'absolute',
        top: '0%',
        left: '0%'
        //,marginTop: "expression(document.documentElement.scrollTop + 'px')"
      });

      this.window.setStyles({
        position: 'absolute',
        top: '0%',
        left: '0%'
        //,marginTop: "(expression(0 - parseInt(this.offsetHeight / 2) + document.documentElement.scrollTop + 'px')"
      });
    }

    $(document.body).adopt(this.overlay, this.window);

    this.fx = {
      overlay: this.overlay.effect('opacity', {
        duration: this.options.fxOverlayDuration,
        wait: false}).set(0),
      window: this.window.effects({
        duration: this.options.fxResizeDuration,
        wait: false}),
      content: this.content.effect('opacity', {
        duration: this.options.fxContentDuration,
        wait: false}).set(0)
    };
  },

  addClick: function(el) {
    return el.addEvent('click', function() {
      if (this.fromElement(el)) return false;
    }.bind(this));
  },

  fromElement: function(el, options) {
    this.initialize();
    this.element = $(el);
    if (this.element && this.element.rel) options = $merge(options || {}, Json.evaluate(this.element.rel));
    if( options.size.ymax ) options.size.y = window.getSize().size.y - 77; //!!
    this.setOptions(this.presets, options);
    this.assignOptions();
    this.url = (this.element ? (this.options.url || this.element.href) : el) || '';

    if (this.options.handler) {
      var handler = this.options.handler;
      return this.setContent(handler, this.parsers[handler].call(this, true));
    }
    var res = false;
    for (var key in this.parsers) {
      if ((res = this.parsers[key].call(this))) return this.setContent(key, res);
    }
    return this;
  },

  assignOptions: function() {
    this.overlay.setProperty('class', this.options.classOverlay);
    this.window.setProperty('class', this.options.classWindow);
  },

  close: function(e) {
    if (e) new Event(e).stop();
    if (!this.isOpen) return this;
    this.fx.overlay.start(0).chain(this.toggleOverlay.bind(this));
    this.window.setStyle('display', 'none');
    this.trashImage();
    this.toggleListeners();
    this.isOpen = null;
    this.fireEvent('onClose', [this.content]).removeEvents();
    this.options = {};
    this.setOptions(this.presets).callChain();
    return this;
  },

  onError: function() {
    if (this.image) this.trashImage();
    this.setContent('Error during loading');
  },

  trashImage: function() {
    if (this.image) this.image = this.image.onload = this.image.onerror = this.image.onabort = null;
  },

  setContent: function(handler, content) {
    this.content.setProperty('class', 'sbox-content-' + handler);
    this.applyTimer = this.applyContent.delay(this.fx.overlay.options.duration, this, [this.handlers[handler].call(this, content)]);
    if (this.overlay.opacity) return this;
    this.toggleOverlay(true);
    this.fx.overlay.start(this.options.overlayOpacity);
    this.reposition();
    return this;
  },

  applyContent: function(content, size) {
    this.applyTimer = $clear(this.applyTimer);
    this.hideContent();
    if (!content) this.toggleLoading(true);
    else {
      if (this.isLoading) this.toggleLoading(false);
      this.fireEvent('onUpdate', [this.content], 20);
    }
    this.content.empty()[['string', 'array', false].contains($type(content)) ? 'setHTML' : 'adopt'](content || '');
    this.callChain();
    if (!this.isOpen) {
      this.toggleListeners(true);
      this.resize(size, true);
      this.isOpen = true;
      this.fireEvent('onOpen', [this.content]);
    } else this.resize(size);
  },

  resize: function(size, instantly) {
    var sizes = window.getSize();
    this.size = $merge(this.isLoading ? this.options.sizeLoading : this.options.size, size);
    var to = {
      width: this.size.x,
      height: this.size.y,
      marginLeft: - this.size.x / 2,
      marginTop: - this.size.y / 2
      //left: (sizes.scroll.x + (sizes.size.x - this.size.x - this.options.marginInner.x) / 2).toInt(),
      //top: (sizes.scroll.y + (sizes.size.y - this.size.y - this.options.marginInner.y) / 2).toInt()
    };
    $clear(this.showTimer || null);
    this.hideContent();
    if (!instantly) this.fx.window.start(to).chain(this.showContent.bind(this));
    else {
      this.window.setStyles(to).setStyle('display', '');
      this.showTimer = this.showContent.delay(50, this);
    }
    this.reposition(sizes);
  },

  toggleListeners: function(state) {
    var task = state ? 'addEvent' : 'removeEvent';
    this.btnClose[task]('click', this.listeners.close);
    if (this.options.closeWithOverlay) this.overlay[task]('click', this.listeners.close);
    document[task]('keydown', this.listeners.key);
    window[task]('resize', this.listeners.window);
    window[task]('scroll', this.listeners.window);
  },

  toggleLoading: function(state) {
    this.isLoading = state;
    this.window[state ? 'addClass' : 'removeClass']('sbox-loading');
    if (state) this.fireEvent('onLoading', [this.window]);
  },

  toggleOverlay: function(state) {
    this.overlay.setStyle('display', state ? '' : 'none');
    $(document.body)[state ? 'addClass' : 'removeClass']('body-overlayed');
  },

  showContent: function() {
    if (this.content.opacity) this.fireEvent('onShow', [this.window]);
    this.fx.content.start(1);
  },

  hideContent: function() {
    if (!this.content.opacity) this.fireEvent('onHide', [this.window]);
    this.fx.content.stop().set(0);
  },

  onkeypress: function(e) {
    switch (e.key) {
      case 'esc':
      case 'x':
        this.close();
        break;
    }
  },

  reposition: function(sizes) {
    sizes = sizes || window.getSize();
    this.overlay.setStyles({
      //'left': sizes.scroll.x, 'top': sizes.scroll.y,
      width: sizes.size.x,
      height: sizes.size.y
    });
    /*
    this.window.setStyles({
      left: (sizes.scroll.x + (sizes.size.x - this.window.offsetWidth) / 2).toInt(),
      top: (sizes.scroll.y + (sizes.size.y - this.window.offsetHeight) / 2).toInt()
    });
    */
    this.fireEvent('onMove', [this.overlay, this.window, sizes]);
  },

  removeEvents: function(type){
    if (!this.$events) return this;
    if (!type) this.$events = null;
    else if (this.$events[type]) this.$events[type] = null;
    return this;
  },

  parsers: {
    'image': function(preset) {
      return (preset || this.url.test(/\.(jpg|jpeg|png|gif|bmp)$/i)) ? this.url : false;
    },
    'adopt': function(preset) {
      if ($(this.options.adopt)) return $(this.options.adopt);
      //!!if (preset || ($(this.element) && !this.element.parentNode)) return $(this.element);
      var bits = this.url.match(/#([\w-]+)$/);
      return bits ? $(bits[1]) : false;
    },
    'url': function(preset) {
      return (preset || (this.url && !this.url.test(/^javascript:/i))) ? this.url: false;
    },
    'iframe': function(preset) {
      return (preset || this.url) ? this.url: false;
    },
    'string': function(preset) {
      return true;
    }
  },

  handlers: {
    'image': function(url) {
      this.image = new Image();
      var events = {
        loaded: function() {
          var win = {x: window.getWidth() - this.options.marginImage.x, y: window.getHeight() - this.options.marginImage.y};
          var size = {x: this.image.width, y: this.image.height};
          for (var i = 0; i < 2; i++)
            if (size.x > win.x) {
              size.y *= win.x / size.x;
              size.x = win.x;
            } else if (size.y > win.y) {
              size.x *= win.y / size.y;
              size.y = win.y;
            }
          size = {x: parseInt(size.x), y: parseInt(size.y)};
          if (window.webkit419) this.image = new Element('img', {'src': this.image.src});
          else $(this.image);
          this.image.setProperties({
            'width': size.x,
            'height': size.y});
          this.applyContent(this.image, size);
        }.bind(this),
        failed: this.onError.bind(this)
      };
      (function() {
        this.src = url;
      }).delay(10, this.image);
      this.image.onload = events.loaded;
      this.image.onerror = this.image.onabort = events.failed;
    },
    'adopt': function(el) {
      return el.clone();
    },
    'url': function(url) {
      this.ajax = new Ajax(url, this.options.ajaxOptions);
      this.ajax.addEvent('onSuccess', function(resp) {
        this.applyContent(resp);
        this.ajax = null;
      }.bind(this));
      this.ajax.addEvent('onFailure', this.onError.bind(this));
      this.ajax.request.delay(10, this.ajax);
    },
    'iframe': function(url) {
      return new Element('iframe', {
        'src': url,
        'frameBorder': 0,
        'width': this.options.size.x,
        'height': this.options.size.y
      });
    },
    'string': function(str) {
      return str;
    }
  },

  extend: $extend
};

SqueezeBox.extend(SqueezeBox, Events.prototype);
SqueezeBox.extend(SqueezeBox, Options.prototype);
SqueezeBox.extend(SqueezeBox, Chain.prototype);