using System;
using System.IO;
using System.Text;
using OpenRA.Traits;

namespace OpenRA.Mods.Rg.Traits
{
    public class RgUniqueIdInfo : ITraitInfo
    {
        public string Filename = "RgSerial.txt";

        public object Create(ActorInitializer init)
        {
            return new RgUniqueId(init, this);
        }
    }

    public class RgUniqueId : IResolveOrder
    {
        public string SerialFile = "";
        public string Serial = "";
        public const string ORDER = "RgUniqueId";
        public RgUniqueId(ActorInitializer init, RgUniqueIdInfo info)
        {
            SerialFile = Game.SupportDir + info.Filename;

            if (!File.Exists(SerialFile))
            {
                GenerateSerial();
            }else
            {
                LoadSerial();
            }

            SendSerial(init.self);
        }

        private void SendSerial(Actor self)
        {
            self.World.IssueOrder(new Order(ORDER, self, Serial));
        }

        private void LoadSerial()
        {
            Serial = File.ReadAllText(SerialFile, Encoding.UTF8);
        }

        private void GenerateSerial()
        {
            Serial = Guid.NewGuid().ToString();

            File.WriteAllText(SerialFile, Serial, Encoding.UTF8);
        }

        public void ResolveOrder(Actor self, Order order)
        {
            if (order.OrderString == ORDER && Serial == "")
            {
                Serial = order.OrderString;
            }
        }
    }
}