using System;
using static System.Buffers.Binary.BinaryPrimitives;

namespace PKHeX.Core
{
    public class MyStatus6 : SaveBlock<SAV6>, IRegionOrigin
    {
        public MyStatus6(SAV6 sav, int offset) : base(sav) => Offset = offset;

        public int TID
        {
            get => ReadUInt16LittleEndian(Data.AsSpan(Offset + 0));
            set => WriteUInt16LittleEndian(Data.AsSpan(Offset + 0), (ushort)value);
        }

        public int SID
        {
            get => ReadUInt16LittleEndian(Data.AsSpan(Offset + 2));
            set => WriteUInt16LittleEndian(Data.AsSpan(Offset + 2), (ushort)value);
        }

        public int Game
        {
            get => Data[Offset + 4];
            set => Data[Offset + 4] = (byte)value;
        }

        public int Gender
        {
            get => Data[Offset + 5];
            set => Data[Offset + 5] = (byte)value;
        }

        public int MultiplayerSpriteID_1
        {
            get => Data[Offset + 6];
            set => Data[Offset + 6] = (byte)value;
        }

        public int MultiplayerSpriteID_2
        {
            get => Data[Offset + 7];
            set => Data[Offset + 7] = (byte)value;
        }

        public const int GameSyncIDSize = 16; // 64 bits

        public string GameSyncID
        {
            get => Util.GetHexStringFromBytes(Data, Offset + 0x08, GameSyncIDSize / 2);
            set
            {
                if (value.Length != GameSyncIDSize)
                    throw new ArgumentException(nameof(value));

                var data = Util.GetBytesFromHexString(value);
                SAV.SetData(data, Offset + 0x08);
            }
        }

        public byte Region
        {
            get => Data[Offset + 0x26];
            set => Data[Offset + 0x26] = value;
        }

        public byte Country
        {
            get => Data[Offset + 0x27];
            set => Data[Offset + 0x27] = value;
        }

        public decimal Latitude // don't use the setters
        {
            get => (ReadInt16LittleEndian(Data.AsSpan(Offset + 0x28)) * 180m) / 0x8000;
            set => WriteInt16LittleEndian(Data.AsSpan(Offset + 0x28), (short)((value * 0x8000) / 180m));
        }

        public decimal Longitude // don't use the setters
        {
            get => (ReadInt16LittleEndian(Data.AsSpan(Offset + 0x2A)) * 180m) / 0x8000;
            set => WriteInt16LittleEndian(Data.AsSpan(Offset + 0x2A), (short)((value * 0x8000) / 180m));
        }

        public byte ConsoleRegion
        {
            get => Data[Offset + 0x2C];
            set => Data[Offset + 0x2C] = value;
        }

        public int Language
        {
            get => Data[Offset + 0x2D];
            set => Data[Offset + 0x2D] = (byte)value;
        }

        private Span<byte> OT_Trash => Data.AsSpan(Offset + 0x48, 0x1A);

        public string OT
        {
            get => SAV.GetString(OT_Trash);
            set => SAV.SetString(OT_Trash, value.AsSpan(), SAV.OTLength, StringConverterOption.ClearZero);
        }

        private Span<byte> GetSayingSpan(int say) => Data.AsSpan(GetSayingOffset(say), SAV6.LongStringLength);
        private int GetSayingOffset(int say) => Offset + 0x7C + (SAV6.LongStringLength * say);
        private string GetSaying(int say) => SAV.GetString(GetSayingSpan(say));
        private void SetSaying(int say, string value) => SAV.SetString(GetSayingSpan(say), value.AsSpan(), SAV6.LongStringLength / 2, StringConverterOption.ClearZero);

        public string Saying1 { get => GetSaying(0); set => SetSaying(0, value); }
        public string Saying2 { get => GetSaying(1); set => SetSaying(1, value); }
        public string Saying3 { get => GetSaying(2); set => SetSaying(2, value); }
        public string Saying4 { get => GetSaying(3); set => SetSaying(3, value); }
        public string Saying5 { get => GetSaying(4); set => SetSaying(4, value); }

        public bool IsMegaEvolutionUnlocked
        {
            get => (Data[Offset + 0x14A] & 0x01) != 0;
            set => Data[Offset + 0x14A] = (byte)((Data[Offset + 0x14A] & 0xFE) | (value ? 1 : 0)); // in battle
        }

        public bool IsMegaRayquazaUnlocked
        {
            get => (Data[Offset + 0x14A] & 0x02) != 0;
            set => Data[Offset + 0x14A] = (byte)((Data[Offset + 0x14A] & ~2) | (value ? 2 : 0)); // in battle
        }
    }
}