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

namespace PKHeX.Core;

public sealed class Misc7 : SaveBlock<SAV7>
{
    public Misc7(SAV7 sav, int offset) : base(sav) => Offset = offset;

    public uint Money
    {
        get => ReadUInt32LittleEndian(Data.AsSpan(Offset + 0x4));
        set
        {
            if (value > 9_999_999)
                value = 9_999_999;
            WriteUInt32LittleEndian(Data.AsSpan(Offset + 0x4), value);
        }
    }

    public uint Stamps
    {
        get => (ReadUInt32LittleEndian(Data.AsSpan(Offset + 0x08)) << 13) >> 17;  // 15 stamps; discard top13, lowest4
        set
        {
            uint flags = ReadUInt32LittleEndian(Data.AsSpan(Offset + 0x08)) & 0xFFF8000F;
            flags |= (value & 0x7FFF) << 4;
            WriteUInt32LittleEndian(SAV.Data.AsSpan(Offset + 0x08), flags);
        }
    }

    public uint BP
    {
        get => ReadUInt32LittleEndian(Data.AsSpan(Offset + 0x11C));
        set
        {
            if (value > 9999)
                value = 9999;
            WriteUInt32LittleEndian(Data.AsSpan(Offset + 0x11C), value);
        }
    }

    public int Vivillon
    {
        get => Data[Offset + 0x130] & 0x1F;
        set => Data[Offset + 0x130] = (byte)((Data[Offset + 0x130] & ~0x1F) | (value & 0x1F));
    }

    public uint StarterEncryptionConstant
    {
        get => ReadUInt32LittleEndian(Data.AsSpan(Offset + 0x148));
        set => WriteUInt32LittleEndian(Data.AsSpan(Offset + 0x148), value);
    }

    public int DaysFromRefreshed
    {
        get => Data[Offset + 0x123];
        set => Data[Offset + 0x123] = (byte)value;
    }

    public int GetSurfScore(int recordID)
    {
        if ((uint)recordID >= 4)
            recordID = 0;
        return ReadInt32LittleEndian(Data.AsSpan(Offset + 0x138 + (4 * recordID)));
    }

    public void SetSurfScore(int recordID, int score)
    {
        if ((uint)recordID >= 4)
            recordID = 0;
        WriteInt32LittleEndian(Data.AsSpan(Offset + 0x138 + (4 * recordID)), score);
    }
}