var calculator_settings_0 = {
	
	'field_list' : {
		"area" : { "type" : "int", "default" : 14, "min_value" : 1, "max_value" : 150 }
		, "chandelier" : { "type" : "int", "default" : 1, "price" : 600, "min_value" : 0, "max_value" : 20 }
		, "corners" : { "type" : "discrete", "default" : 4, "price" : 0, "min_value" : 3, "max_value" : 20, "option_list" : { 7 : { "from" : 1, "till" : 4, "price" : 100 }, 8 : { "from" : 5, "till" : 10, "price" : 150 }, 9 : { "from" : 11, "till" : 999, "price" : 200 } } }
		, "hook" : { "type" : "int", "default" : 0, "price" : 600, "min_value" : 0, "max_value" : 20 }
		, "lamp" : { "type" : "int", "default" : 0, "price" : 300, "min_value" : 0, "max_value" : 20 }
		, "pipes" : { "type" : "int", "default" : 1, "price" : 300, "min_value" : 0, "max_value" : 20 }
		, "texture" : { "type" : "select", "default" : 2, "price" : 0, "option_list" : { 1 : 570, 2 : 870, 3 : 810, 4 : 1500, 5 : 1300, 6 : 1300, 7 : 1300, 8 : 1300 } }
	},

	'crosstable' : {},

	'formula' : function ( field_list ) {
		return field_list.area.value * field_list.texture.price + field_list.corners.price + field_list.chandelier.value * field_list.chandelier.price + field_list.hook.value * field_list.hook.price + field_list.pipes.value * field_list.pipes.price + field_list.lamp.value * field_list.lamp.price;
	}

};

jQuery.fn.calculator = function ( options, calc_settings ) {

	var calc_field		= function ( field_name ) {

		return calc_field_list[ field_name ] || false;

	}

	var form_field		= function ( field_name ) {

		var field = false;

		form_field_list.each( function () {
			
			var f = jQuery( this );
			if ( f.attr( 'field-name' ) == field_name )
				return field = f;

		} );

		return field;

	}

	var field_value_id		= function ( field ) {

		if ( 'undefined' == typeof field.type || 'int' == field.type )
			return false;

		if ( 'select' == field.type )
			return field.value;

		if ( 'discrete' == field.type ) {
			
			for ( value_id in field.option_list )
				if ( field.option_list[ value_id ].from <= field.value && field.value <= field.option_list[ value_id ].till )
					return parseInt( value_id );

			return false;

		}

	}

	var field_price		= function ( field ) {

		if ( 'undefined' == typeof field.type )
			return false;

		if ( 'int' == field.type )
			return field.price || 0;

		if ( 'select' == field.type )
			return field.option_list[ field.value ] || 0;

		if ( 'discrete' == field.type )
			return field.option_list[ field.value_id ].price || 0;

	}

	var check_cross		= function ( field_list ) {

		for ( field_name in field_list )
			if ( ( field = field_list[ field_name ] ) && 'undefined' != field.cross_field && field.cross_field && 'undefined' != ( cross_field = field_list[ field.cross_field ] ) ) {
				
				var cross_key = field.value_id + '-' + cross_field.value_id;
				if ( 'undefined' != typeof calc_settings.crosstable[ cross_key ] ) {
					field_list[ field_name ].cross = calc_settings.crosstable[ cross_key ];
					field_list[ field.cross_field ].cross = calc_settings.crosstable[ cross_key ];
				}

				var cross_key = cross_field.value_id + '-' + field.value_id;
				if ( 'undefined' != typeof calc_settings.crosstable[ cross_key ] ) {
					field_list[ field_name ].cross = calc_settings.crosstable[ cross_key ];
					field_list[ field.cross_field ].cross = calc_settings.crosstable[ cross_key ];
				}

			}

		return field_list;

	}

	var check_value		= function ( field ) {

		if ( 'select' == field.type ) {

			if ( 'undefined' == field.option_list[ field.value ] ) {
				field.error = 'Неверное значение';
				error = true;
				return false;
			}

			return true;

		}

		if ( 'int' == field.type || 'discrete' == field.type ) {

			if ( 'undefined' != field.min_value && field.min_value > field.value ) {
				field.error = 'Значение должно быть больше ' + field.min_value;
				error = true;
				return false;
			}

			if ( 'undefined' != field.max_value && field.max_value < field.value ) {
				field.error = 'Значение должно быть меньше ' + field.max_value;
				error = true;
				return false;
			}

			return true;

		}

		return true;

	}

	var field_value		= function ( field ) {

		if ( 'undefined' == typeof field )
			return false;

		field.error				= false;
		field.value				= field.form_field ? ( parseInt( field.form_field.val() ) || 0 ) : 0;

		if ( !check_value( field ) )
			field.error_wrap.text( field.error ).slideDown();
		else
			field.error_wrap.text( '' ).hide();

		field.value_id			= field_value_id( field );
		field.price				= field_price( field );
		field.cross				= 0;

	}

	var count_price		= function () {

		var price = error ? false : calc_settings.formula( calc_field_list );
		
		options.result_block.html( error ? "&mdash;" : price );

		price_value.val( price || 'error' );

	}

	var field_change	= function ( field_name ) {

		if ( 'undefined' == calc_field_list[ field_name ] )
			return false;

		field_value( calc_field_list[ field_name ] );
		check_cross( calc_field_list );

		count_price();

	}

	var form				= jQuery( this );
	
	if ( !form.length )
		return false;

	var	form_field_list		= form.find( '.calc_field' ),
		price_value			= form.find( 'input[name="calculator_price"]' ),
		error				= false,
		
		options				= jQuery.extend( {
			result_block : jQuery( '#calculator_result' ),
			count_button : jQuery( '#calculator_count_button' )

		}, options ),

		calc_settings		= calc_settings,

		calc_field_list		= ( function ( s ) {

			var _fl = s.field_list;
			
			for ( field_name in _fl ) {
				_fl[ field_name ].form_field		= form_field( field_name );
				_fl[ field_name ].error_wrap		= form.find( 'div[field-error="' + field_name + '"]' );
				field_value( _fl[ field_name ] );
			}

			return check_cross( _fl );

		} )( calc_settings );

	count_price();

	form_field_list.change( function () {

		error = false;

		var f = jQuery( this );

		field_change( f.attr( 'field-name' ) );

	} );

	if ( options.count_button )
		options.count_button.click( function () {
			count_price();
			return false;
		} );

}

jQuery( document ).ready( function () {
	
	jQuery( '#calculator_form' ).calculator( {}, calculator_settings_0 );

} );