// jQuery Alert Dialogs Plugin
//
// Version 1.1
//
// Cory S.N. LaViska
// A Beautiful Site (http://abeautifulsite.net/)
// 14 May 2009
//
// Visit http://abeautifulsite.net/notebook/87 for more information
//
// Usage:
//		jAlert( message, [title, callback] )
//		jConfirm( message, [title, callback] )
//		jPrompt( message, [value, title, callback] )
// 
// History:
//
//		1.00 - Released (29 December 2008)
//
//		1.01 - Fixed bug where unbinding would destroy all resize events
//
// License:
// 
// This plugin is dual-licensed under the GNU General Public License and the MIT License and
// is copyright 2008 A Beautiful Site, LLC. 
//
(function ($) {

  $.alerts = {

    // These properties can be read/written by accessing $.alerts.propertyName from your scripts at any time

    verticalOffset: -75,                // vertical offset of the dialog from center screen, in pixels
    horizontalOffset: 0,                // horizontal offset of the dialog from center screen, in pixels/
    repositionOnResize: true,           // re-centers the dialog on window resize
    overlayOpacity: .01,                // transparency level of overlay
    overlayColor: '#FFF',               // base color of overlay
    draggable: true,                    // make the dialogs draggable (requires UI Draggables plugin)
    okButton: ' Close this window ',         // text for the OK button
    cancelButton: ' Cancel ', // text for the Cancel button
    dialogClass: null,                  // if specified, this class will be applied to all dialogs

    // Public methods

    alert: function (message, title, callback) {
      if (title == null) title = 'Quick Order Alert';
      $.alerts._show(title, message, null, 'alert', function (result) {
        if (callback) callback(result);
      });
    },

    confirm: function (message, title, callback) {
      if (title == null) title = 'Confirm';
      $.alerts._show(title, message, null, 'confirm', function (result) {
        if (callback) callback(result);
      });
    },

    prompt: function (message, value, title, callback) {
      if (title == null) title = 'Prompt';
      $.alerts._show(title, message, value, 'prompt', function (result) {
        if (callback) callback(result);
      });
    },

    // Private methods

    _show: function (title, msg, value, type, callback) {

      $.alerts._hide();
      $.alerts._overlay('show');

      $("BODY").append(
			  '<div id="popup_container">' +
			    '<h1 id="popup_title"></h1>' +
			    '<div id="popup_content">' +
			      '<div id="popup_message"></div>' +
				'</div>' +
			  '</div>');

      if ($.alerts.dialogClass) $("#popup_container").addClass($.alerts.dialogClass);

      // IE6 Fix
      var pos = ($.browser.msie && parseInt($.browser.version) <= 6) ? 'absolute' : 'fixed';

      $("#popup_container").css({
        position: pos,
        zIndex: 99999,
        padding: 0,
        margin: 0
      });

      $("#popup_title").text(title);
      $("#popup_content").addClass(type);
      $("#popup_message").text(msg);
      $("#popup_message").html($("#popup_message").text().replace(/\n/g, '<br />'));

      $("#popup_container").css({
        minWidth: $("#popup_container").outerWidth(),
        maxWidth: $("#popup_container").outerWidth()
      });

      $.alerts._reposition();
      $.alerts._maintainPosition(true);

      switch (type) {
        case 'alert':
          $("#popup_message").after('<div id="popup_panel"><input type="button" value="' + $.alerts.okButton + '" id="popup_ok" /></div><br />');
          $("#popup_ok").click(function () {
            $.alerts._hide();
            callback(true);
          });
          $("#popup_ok").focus().keypress(function (e) {
            if (e.keyCode == 13 || e.keyCode == 27) $("#popup_ok").trigger('click');
          });
          break;
        case 'confirm':
          $("#popup_message").after('<div id="popup_panel"><input type="button" value="' + $.alerts.okButton + '" id="popup_ok" /> <input type="button" value="' + $.alerts.cancelButton + '" id="popup_cancel" /></div>');
          $("#popup_ok").click(function () {
            $.alerts._hide();
            if (callback) callback(true);
          });
          $("#popup_cancel").click(function () {
            $.alerts._hide();
            if (callback) callback(false);
          });
          $("#popup_ok").focus();
          $("#popup_ok, #popup_cancel").keypress(function (e) {
            if (e.keyCode == 13) $("#popup_ok").trigger('click');
            if (e.keyCode == 27) $("#popup_cancel").trigger('click');
          });
          break;
        case 'prompt':
          $("#popup_message").append('<br /><input type="text" size="30" id="popup_prompt" />').after('<div id="popup_panel"><input type="button" value="' + $.alerts.okButton + '" id="popup_ok" /> <input type="button" value="' + $.alerts.cancelButton + '" id="popup_cancel" /></div>');
          $("#popup_prompt").width($("#popup_message").width());
          $("#popup_ok").click(function () {
            var val = $("#popup_prompt").val();
            $.alerts._hide();
            if (callback) callback(val);
          });
          $("#popup_cancel").click(function () {
            $.alerts._hide();
            if (callback) callback(null);
          });
          $("#popup_prompt, #popup_ok, #popup_cancel").keypress(function (e) {
            if (e.keyCode == 13) $("#popup_ok").trigger('click');
            if (e.keyCode == 27) $("#popup_cancel").trigger('click');
          });
          if (value) $("#popup_prompt").val(value);
          $("#popup_prompt").focus().select();
          break;
      }

      // Make draggable
      if ($.alerts.draggable) {
        try {
          $("#popup_container").draggable({ handle: $("#popup_title") });
          $("#popup_title").css({ cursor: 'move' });
        } catch (e) { /* requires jQuery UI draggables */ }
      }
    },

    _hide: function () {
      $("#popup_container").remove();
      $.alerts._overlay('hide');
      $.alerts._maintainPosition(false);
    },

    _overlay: function (status) {
      switch (status) {
        case 'show':
          $.alerts._overlay('hide');
          $("BODY").append('<div id="popup_overlay"></div>');
          $("#popup_overlay").css({
            position: 'absolute',
            zIndex: 99998,
            top: '0px',
            left: '0px',
            width: '100%',
            height: $(document).height(),
            background: $.alerts.overlayColor,
            opacity: $.alerts.overlayOpacity
          });
          break;
        case 'hide':
          $("#popup_overlay").remove();
          break;
      }
    },

    _reposition: function () {
      var top = (($(window).height() / 2) - ($("#popup_container").outerHeight() / 2)) + $.alerts.verticalOffset;
      var left = (($(window).width() / 2) - ($("#popup_container").outerWidth() / 2)) + $.alerts.horizontalOffset;
      if (top < 0) top = 0;
      if (left < 0) left = 0;

      // IE6 fix
      if ($.browser.msie && parseInt($.browser.version) <= 6) top = top + $(window).scrollTop();

      $("#popup_container").css({
        top: top + 'px',
        left: left + 'px'
      });
      $("#popup_overlay").height($(document).height());
    },

    _maintainPosition: function (status) {
      if ($.alerts.repositionOnResize) {
        switch (status) {
          case true:
            $(window).bind('resize', $.alerts._reposition);
            break;
          case false:
            $(window).unbind('resize', $.alerts._reposition);
            break;
        }
      }
    }

  }

  // Shortuct functions
  jAlert = function (message, title, callback) {
    $.alerts.alert(message, title, callback);
  }

  jConfirm = function (message, title, callback) {
    $.alerts.confirm(message, title, callback);
  };

  jPrompt = function (message, value, title, callback) {
    $.alerts.prompt(message, value, title, callback);
  };

})(jQuery);