(function($) {
  $.mevelbox = function(data, klass) {
    $.mevelbox.loading()
    if (data.ajax) fillmevelboxFromAjax(data.ajax, klass)
    else if (data.image) fillmevelboxFromImage(data.image, klass)
    else if (data.div) fillmevelboxFromHref(data.div, klass)
    else if ($.isFunction(data)) data.call($)
    else $.mevelbox.reveal(data, klass)
  }
  $.extend($.mevelbox, {
    settings: {
      opacity      : 0.2,
      overlay      : true,
      loadingImage : 'mevelbox-loading.gif',
      closeImage   : 'mevelbox-closelabel.png',
      imageTypes   : [ 'png', 'jpg', 'jpeg', 'gif' ],
      mevelboxHtml  : '\
    <div id="mevelbox" style="display:none;"> \
      <div class="popup"> \
        <div class="content"> \
        </div> \
        <a href="#" class="close"></a> \
      </div> \
    </div>'
    },
    loading: function() {
      init()
      if ($('#mevelbox .loading').length == 1) return true
      showOverlay()
      $('#mevelbox .content').empty().
        append('<div class="loading"><img src="'+$.mevelbox.settings.loadingImage+'"/></div>')
      $('#mevelbox').show().css({
        top:	getPageScroll()[1] + (getPageHeight() / 10),
        left:	$(window).width() / 2 - ($('#mevelbox .popup').outerWidth() / 2)
      })
      $(document).bind('keydown.mevelbox', function(e) {
        if (e.keyCode == 27) $.mevelbox.close()
        return true
      })
      $(document).trigger('loading.mevelbox')
    },
    reveal: function(data, klass) {
      $(document).trigger('beforeReveal.mevelbox')
      if (klass) $('#mevelbox .content').addClass(klass)
      $('#mevelbox .content').empty().append(data)
      $('#mevelbox .popup').children().fadeIn('normal')
      $('#mevelbox').css('left', $(window).width() / 2 - ($('#mevelbox .popup').outerWidth() / 2))
      $(document).trigger('reveal.mevelbox').trigger('afterReveal.mevelbox')
    },
    close: function() {
      $(document).trigger('close.mevelbox')
      return false
    }
  })
  $.fn.mevelbox = function(settings) {
    if ($(this).length == 0) return
    init(settings)
    function clickHandler() {
      $.mevelbox.loading(true)
      var klass = this.rel.match(/mevelbox\[?\.(\w+)\]?/)
      if (klass) klass = klass[1]
      fillmevelboxFromHref(this.href, klass)
      return false
    }
    return this.bind('click.mevelbox', clickHandler)
  }
  function init(settings) {
    if ($.mevelbox.settings.inited) return true
    else $.mevelbox.settings.inited = true
    $(document).trigger('init.mevelbox')
    makeCompatible()
    var imageTypes = $.mevelbox.settings.imageTypes.join('|')
    $.mevelbox.settings.imageTypesRegexp = new RegExp('\\.(' + imageTypes + ')(\\?.*)?$', 'i')
    if (settings) $.extend($.mevelbox.settings, settings)
    $('body').append($.mevelbox.settings.mevelboxHtml)
    var preload = [ new Image(), new Image() ]
    preload[0].src = $.mevelbox.settings.closeImage
    preload[1].src = $.mevelbox.settings.loadingImage
    $('#mevelbox').find('.b:first, .bl').each(function() {
      preload.push(new Image())
      preload.slice(-1).src = $(this).css('background-image').replace(/url\((.+)\)/, '$1')
    })
    $('#mevelbox .close')
      .click($.mevelbox.close)
      .append('<img src="'
              + $.mevelbox.settings.closeImage
              + '" class="close_image" title="Fechar">')
  }
  function getPageScroll() {
    var xScroll, yScroll;
    if (self.pageYOffset) {
      yScroll = self.pageYOffset;
      xScroll = self.pageXOffset;
    } else if (document.documentElement && document.documentElement.scrollTop) {
      yScroll = document.documentElement.scrollTop;
      xScroll = document.documentElement.scrollLeft;
    } else if (document.body) {
      yScroll = document.body.scrollTop;
      xScroll = document.body.scrollLeft;
    }
    return new Array(xScroll,yScroll)
  }
  function getPageHeight() {
    var windowHeight
    if (self.innerHeight) {
      windowHeight = self.innerHeight;
    } else if (document.documentElement && document.documentElement.clientHeight) {
      windowHeight = document.documentElement.clientHeight;
    } else if (document.body) {
      windowHeight = document.body.clientHeight;
    }
    return windowHeight
  }
  function makeCompatible() {
    var $s = $.mevelbox.settings
    $s.loadingImage = $s.loading_image || $s.loadingImage
    $s.closeImage = $s.close_image || $s.closeImage
    $s.imageTypes = $s.image_types || $s.imageTypes
    $s.mevelboxHtml = $s.mevelbox_html || $s.mevelboxHtml
  }
  function fillmevelboxFromHref(href, klass) {
    if (href.match(/#/)) {
      var url    = window.location.href.split('#')[0]
      var target = href.replace(url,'')
      if (target == '#') return
      $.mevelbox.reveal($(target).html(), klass)
    } else if (href.match($.mevelbox.settings.imageTypesRegexp)) {
      fillmevelboxFromImage(href, klass)
    } else {
      fillmevelboxFromAjax(href, klass)
    }
  }
  function fillmevelboxFromImage(href, klass) {
    var image = new Image()
    image.onload = function() {
      $.mevelbox.reveal('<div class="image"><img src="' + image.src + '" /></div>', klass)
    }
    image.src = href
  }
  function fillmevelboxFromAjax(href, klass) {
    $.get(href, function(data) { $.mevelbox.reveal(data, klass) })
  }
  function skipOverlay() {
    return $.mevelbox.settings.overlay == false || $.mevelbox.settings.opacity === null
  }
  function showOverlay() {
    if (skipOverlay()) return
    if ($('#mevelbox_overlay').length == 0)
      $("body").append('<div id="mevelbox_overlay" class="mevelbox_hide"></div>')
    $('#mevelbox_overlay').hide().addClass("mevelbox_overlayBG")
      .css('opacity', $.mevelbox.settings.opacity)
      .click(function() { $(document).trigger('close.mevelbox') })
      .fadeIn(200)
    return false
  }
  function hideOverlay() {
    if (skipOverlay()) return
    $('#mevelbox_overlay').fadeOut(200, function(){
      $("#mevelbox_overlay").removeClass("mevelbox_overlayBG")
      $("#mevelbox_overlay").addClass("mevelbox_hide")
      $("#mevelbox_overlay").remove()
    })
    return false
  }
  $(document).bind('close.mevelbox', function() {
    $(document).unbind('keydown.mevelbox')
    $('#mevelbox').fadeOut(function() {
      $('#mevelbox .content').removeClass().addClass('content')
      $('#mevelbox .loading').remove()
      $(document).trigger('afterClose.mevelbox')
    })
    hideOverlay()
  })
})(jQuery);