(function($) {
  $.dialog = function(data, klass) {
    $.dialog.loading()

    if (data.ajax) filldialogFromAjax(data.ajax, klass)
    else if (data.image) filldialogFromImage(data.image, klass)
    else if (data.div) filldialogFromHref(data.div, klass)
    else if ($.isFunction(data)) data.call($)
    else $.dialog.reveal(data, klass)
  }

  $.extend($.dialog, {
    settings: {
      opacity      : 0.2,
      overlay      : true,
      loadingImage : 'img/loading.gif',
      closeImage   : 'img/closelabel.png',
      imageTypes   : [ 'png', 'jpg', 'jpeg', 'gif' ],
      dialogHtml  : '\
    <div id="dialog" class="hidden"> \
      <div class="popup"> \
        <div class="content"> \
        </div> \
        <a href="#" class="close"><img class="close_image" gravity="e" lazyload="no" src="img/closelabel.png" title="關閉" /></a> \
      </div> \
    </div>'
    },

    loading: function() {
      init()
      if ($('#dialog .loading').length == 1) return true
      showOverlay()

      $('#dialog .content').empty()
      $('#dialog .body').children().hide().end().
        append('<div class="loading"><img src="'+$.dialog.settings.loadingImage+'"/></div>')

      $('#dialog').css({
        top:	getPageScroll()[1] + (getPageHeight() / 6),
        left:	$(window).width() / 2 - 205
      }).show()

      $(document).bind('keydown.dialog', function(e) {
        if (e.keyCode == 27) $.dialog.close()
        return true
      })
      $(document).trigger('loading.dialog')
    },

    reveal: function(data, klass) {
      $(document).trigger('beforeReveal.dialog')
      if (klass) $('#dialog .content').addClass(klass)
      $('#dialog .content').append(data)
      $('#dialog .loading').remove()
      $('#dialog .body').children().fadeIn('normal')
      $('#dialog').css('left', $(window).width() / 2 - ($('#dialog .popup').width() / 2))
      $(document).trigger('reveal.dialog').trigger('afterReveal.dialog')
    },

    close: function() {
      $(document).trigger('close.dialog')
      return false
    }
  })

  $.fn.dialog = function(settings) {
    if ($(this).length == 0) return

    init(settings)

    function clickHandler() {
      $.dialog.loading(true)

      var klass = this.rel.match(/dialog\[?\.(\w+)\]?/)
      if (klass) klass = klass[1]

      filldialogFromHref(this.href, klass, this.rev)
      return false
    }

    return this.bind('click.dialog', clickHandler)
  }

  function init(settings) {
    if ($.dialog.settings.inited) return true
    else $.dialog.settings.inited = true

    $(document).trigger('init.dialog')
    makeCompatible()

    var imageTypes = $.dialog.settings.imageTypes.join('|')
    $.dialog.settings.imageTypesRegexp = new RegExp('\.(' + imageTypes + ')$', 'i')

    if (settings) $.extend($.dialog.settings, settings)
    $('body').append($.dialog.settings.dialogHtml)

    var preload = [ new Image(), new Image() ]
    preload[0].src = $.dialog.settings.closeImage
    preload[1].src = $.dialog.settings.loadingImage

    $('#dialog').find('.b:first, .bl').each(function() {
      preload.push(new Image())
      preload.slice(-1).src = $(this).css('background-image').replace(/url\((.+)\)/, '$1')
    })

    $('#dialog .close').click($.dialog.close)
    $('#dialog .close_image').attr('src', $.dialog.settings.closeImage)
  }

  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 = $.dialog.settings

    $s.loadingImage = $s.loading_image || $s.loadingImage
    $s.closeImage = $s.close_image || $s.closeImage
    $s.imageTypes = $s.image_types || $s.imageTypes
    $s.dialogHtml = $s.dialog_html || $s.dialogHtml
  }

	function filldialogFromHref(href, klass, rev) {
		// div
		if (href.match(/#/)) {
			var url = window.location.href.split('#')[0]
			var target = href.replace(url, '')
			$.dialog.reveal($(target).clone().show(), klass)

		// image
		} else if (href.match($.dialog.settings.imageTypesRegexp)) {
			filldialogFromImage(href, klass)

		// iframe
		} else if (rev.split('|')[0] == 'iframe') {
			filldialogFromIframe(href, klass, rev.split('|')[1])

		// ajax
		} else {
			filldialogFromAjax(href, klass)
		}
	}

  function filldialogFromImage(href, klass) {
    var image = new Image()
    image.onload = function() {
      $.dialog.reveal('<div class="image"><img src="' + image.src + '" /></div>', klass)
    }
    image.src = href
  }

  function filldialogFromAjax(href, klass) {
    $.get(href, function(data) { $.dialog.reveal(data, klass) })
  }

  function skipOverlay() {
    return $.dialog.settings.overlay == false || $.dialog.settings.opacity === null
  }

  function showOverlay() {
    if (skipOverlay()) return

    if ($('#dialog_overlay').length == 0)
      $("body").append('<div id="dialog_overlay" class="dialog_hide"></div>')

    $('#dialog_overlay').hide().addClass("dialog_overlayBG")
      .css('opacity', $.dialog.settings.opacity)
      .click(function() { $(document).trigger('close.dialog') })
      .fadeIn(200)
    return false
  }

  function hideOverlay() {
    if (skipOverlay()) return

    $('#dialog_overlay').fadeOut(200, function(){
      $("#dialog_overlay").removeClass("dialog_overlayBG")
      $("#dialog_overlay").addClass("dialog_hide")
      $("#dialog_overlay").remove()
    })

    return false
  }

	function filldialogFromIframe(href, klass, height) {
		$.dialog.reveal('<iframe scrolling="no" marginwidth="0" width="500" height="' + height + '" frameborder="0" src="' + href + '" marginheight="0"></iframe>', klass)
	}

  $(document).bind('close.dialog', function() {
    $(document).unbind('keydown.dialog')
    $('#dialog').fadeOut(function() {
      $('#dialog .content').removeClass().addClass('content')
      $('#dialog .loading').remove()
      $(document).trigger('afterClose.dialog')
    })
    hideOverlay()
  })

})(jQuery);

// dialog
jQuery(document).ready(function($) {
	$('a[rel*=dialog]').dialog({})
})