using System;

using System.Collections.Generic;

using Cfg.Net;

using Cfg.Net.Contracts;

using System.Linq;

public class Program {

    public static string GetCfg() {

        return @"

        <cfg address='1009 Broad St.'>

            <rooms>

                <add name='Living' maximum-occupancy='12' />

                <add name='Kitchen' maximum-occupancy='8' />

                <add name='Bath' maximum-occupancy='2' />

            </rooms>

        </cfg>

        ";

    }

    public static void Main() {

        // without the modifier

        var cfg = new Home(GetCfg());

        Console.WriteLine("There are {0} errors.  Everything is fine with your home.", cfg.Errors().Length);

        Console.WriteLine("---");

        // with the bs detector

        cfg = new Home(GetCfg(), new BsDetector());

        Console.WriteLine("There is {0} error.  Let me explain:", cfg.Errors().Length);

        foreach(var error in cfg.Errors()){

            Console.WriteLine(error);

        }

    }

    class Home : CfgNode {

        public Home(string cfg, params IDependency[] dependencies):base(dependencies){

            Load(cfg);

        }

        [Cfg]

        public string Address {get;set;}

        [Cfg]

        public List<Room> Rooms {get; set;}

    }

    class Room : CfgNode {

        [Cfg]

        public string Name {get; set;}

        [Cfg]

        public int MaximumOccupancy {get; set;}

    }

    class BsDetector : ICustomizer {

        public void Customize(string collection, INode node, IDictionary<string,string> parameters, ILogger logger){

            if(collection != "rooms")

                return;

            var name = node.Attributes.First(a=>a.Name == "name").Value.ToString();

            var maxOccupancy = Convert.ToInt32(node.Attributes.First(a=>a.Name == "maximum-occupancy").Value);

            if(maxOccupancy > 10){

                logger.Error("You may not put more than 10 people in your {0} room. You have {1}, and that's {2} too many.", name, maxOccupancy, maxOccupancy - 10);

            }

        }

        public void Customize(INode root, IDictionary<string,string> parameters, ILogger logger){}

    }

}