// 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: ' OK ',         // 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 = '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" class="btn inline"/></div>');
          $("#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" class="btn inline"/> <input type="button" value="' + $.alerts.cancelButton + '" id="popup_cancel" class="btn inline"/></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" class="btn inline"/> <input type="button" value="' + $.alerts.cancelButton + '" id="popup_cancel" class="btn inline"/></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);