window.onhelp = function(){
	return false;
};

$( function(){
	$( document ).on( 'keydown', doKeyDown );
	$( document ).on( 'keydown', doFunctionKey );
});

function doKeyDown( eventObject ){
	var keyCode = eventObject.keyCode;
	var shiftKey = eventObject.shiftKey;
	var idNames;

	if( keyCode == 112 && shiftKey )
		idNames = ['resetButton','searchResetButton'];
	else if( keyCode == 113 )
		idNames = ['addButton'];
	else if( keyCode == 114 )
		idNames = ['updateButton'];
	else if( keyCode == 115 )
		idNames = ['deleteButton'];
	else if( keyCode == 117 )
		idNames = ['searchButton'];
	else if( keyCode == 118 )
		idNames = ['printButton'];
	else if( keyCode == 123 && shiftKey )
		idNames = ['searchAddButton'];
	else
		return true;

	console.log( 'doKeyDown():keyCode:', keyCode + ', shfitKey:' + shiftKey );

	var $mytabs = $( '#mytabs' );

	var $button = null;

	if( $mytabs.length == 0 ){
		console.log( 'no tab' );

		$.each( idNames, function(){
			$button = $( '[id*=_' + this + ']' );

			if( $button.length != 0 )
				return false;
		});
	}else{
		var selectedIndex = $mytabs.tabs( 'option', 'selected' );

		console.log( 'has tab, selectedIndex:' + selectedIndex );

		$.each( idNames, function(){
			$button = $( '[id*=_' + this + ']', $mytabs.children( 'div' ).eq( selectedIndex ) );

			if( $button.length != 0 )
				return false;
		});
	}

	if( $button == null || $button.length == 0 ){
		console.log( '找不到指定的 button' );
		return;
	}

	if( $button.length > 1 ){
		alert( 'trigger 的 button 有二個以上' );
		return;
	}

	event.keyCode = 0;

	if( !$button.prop( 'disabled' ) ){
		console.log( 'functionKey, trigger button id:' + $button.attr( 'id' ) );
		$button.trigger( 'click' );
	}else
		console.log( 'button is dialbed, buttonId:' + $button.attr( 'id' ) );

	return false;
}

function doFunctionKey( eventObject ){
	var keyCode = eventObject.keyCode;
	var ctrlKey = eventObject.ctrlKey;
	var shiftKey = eventObject.shiftKey;
	var altKey = eventObject.altKey;

	//只有按 ctrl, or alt or shift
	if( keyCode == 16 || keyCode == 17 || keyCode == 18 )
		return;

	console.log( 'doFunctionKey():keyCode:' + keyCode + ', ctrlKey:' + ctrlKey + ', shfitKey:' + shiftKey + ', altKey:' + altKey );

	var functionKey = '';

	if( ctrlKey )
		functionKey += 'ctrl_';

	if( shiftKey )
		functionKey += 'shift_';

	if( altKey )
		functionKey += 'alt_';

	functionKey += keyCode;

	console.log( 'functinKey:' + functionKey );

	$( 'a[functionkey=' + functionKey + '], :button[functionkey=' + functionKey + ']' ).trigger( 'click' );
}

( function( $ ){
	$.fn.functionkey = function( settings ){
		var defaultSettings = {
			keyCode			: null,		// key code, refer to http://www.webonweboff.com/tips/js/event_key_codes.aspx
			ctrl	 		: false,	// 是否要加 ctrl
			shift			: false,	// 是否要加 shift
			alt				: false,	// 是否要加  alt
			debug			: false
		};

		var newSettings = $.extend( defaultSettings, settings );

		if( !checkSettings( newSettings ) )
			return;

		return this.each( function(){
			var functionKey = '';

			if( newSettings.ctrl )
				functionKey += 'ctrl_';

			if( newSettings.shift )
				functionKey += 'shift_';

			if( newSettings.alt )
				functionKey += 'alt_';

			functionKey += newSettings.keyCode;

			$(this).attr( 'functionkey', functionKey );

			if( newSettings.debug )
				console.log( $(this).outerHtml() );
		});
	};

	function checkSettings( newSettings ){
		var keyCode = newSettings.keyCode;
		var ctrl = newSettings.ctrl;
		var shift = newSettings.shift;
		var alt = newSettings.alt;

		if( keyCode == null || typeof( keyCode ) != 'number' ){
			alert( 'keyCode 指定的格式不對, keyCode:' + keyCode );
			return false;
		}

		if( ctrl == null || typeof( ctrl ) != 'boolean' ){
			alert( 'ctrl 指定的格式不對, ctrl:' + ctrl );
			return false;
		}

		if( shift == null || typeof( shift ) != 'boolean' ){
			alert( 'shift 指定的格式不對, shift:' + keyCode );
			return false;
		}

		if( alt == null || typeof( alt ) != 'boolean' ){
			alert( 'alt 指定的格式不對, alt:' + alt );
			return false;
		}

		return true;
	}
})( jQuery );