using System;
using Vision.Core.Streams;
using Vision.Core.Structs;
using Vision.Core.Utils;

namespace Vision.Game.Structs.Common
{
    public class ShineDatetime : AbstractStruct
    {
        public const int Size = 4;

        // struct {
        // 	  unsigned __int32 year : 8;
        // 	  unsigned __int32 month : 5;
        // 	  unsigned __int32 date : 6;
        // 	  unsigned __int32 hour : 6;
        // 	  unsigned __int32 minute : 7;
        // };

        public int Bitfield0;

        public DateTime ToDateTime() => ToDateTime(Bitfield0);

        public static DateTime ToDateTime(int bf0)
        {
            using var bs = new BitStream();
            bs.Write(bf0);

            bs.Read(out int year, 0, 8);
            bs.Read(out int month, 0, 5);
            bs.Read(out int date, 0, 6);
            bs.Read(out int hour, 0, 6);
            bs.Read(out int minute, 0, 7);

            DateTime dt;

            try { dt = new DateTime(year, month, date, hour, minute, 0); }
            catch { dt = new DateTime();}

            return dt;
        }

        public static int ToBitField(DateTime dt)
        {
            using var bs = new BitStream();
            bs.Write(dt.Year, 0, 8);
            bs.Write(dt.Month, 0, 5);
            bs.Write(dt.Day, 0, 6);
            bs.Write(dt.Hour, 0, 6);
            bs.Write(dt.Minute, 0, 7);

            bs.Read(out int bf0);

            return bf0;
        }

        public override int GetSize() => Size;

        public override void Read(ReaderStream reader)
        {
            Bitfield0 = reader.ReadInt32();
        }

        public override void Write(WriterStream writer)
        {
            writer.Write(Bitfield0);
        }
    }
}