PKHeX/PKHeX.Core/Saves/Substructures/Gen7/FestaFacility.cs

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

namespace PKHeX.Core;

public sealed class FestaFacility(Memory<byte> raw, int language)
{
    public const int SIZE = 0x48;
    private Span<byte> Data => raw.Span;

    public int Type { get => Data[0x00]; set => Data[0x00] = (byte)value; }
    public int Color { get => Data[0x01]; set => Data[0x01] = (byte)value; }
    public bool IsIntroduced { get => Data[0x02] != 0; set => Data[0x02] = value ? (byte)1 : (byte)0; }
    public byte Gender { get => Data[0x03]; set => Data[0x03] = value; }
    public string OriginalTrainerName { get => StringConverter7.GetString(Data.Slice(0x04, 0x1A)); set => StringConverter7.SetString(Data.Slice(0x04, 0x1A), value, 12, language, StringConverterOption.ClearZero); }

    private int MessageMeet { get => ReadUInt16LittleEndian(Data[0x1E..]); set => WriteUInt16LittleEndian(Data[0x1E..], (ushort)value); }
    private int MessagePart { get => ReadUInt16LittleEndian(Data[0x20..]); set => WriteUInt16LittleEndian(Data[0x20..], (ushort)value); }
    private int MessageMoved { get => ReadUInt16LittleEndian(Data[0x22..]); set => WriteUInt16LittleEndian(Data[0x22..], (ushort)value); }
    private int MessageDisappointed { get => ReadUInt16LittleEndian(Data[0x24..]); set => WriteUInt16LittleEndian(Data[0x24..], (ushort)value); }
    public int UsedLuckyRank { get => Data[0x26]; set => Data[0x26] = (byte)value; } // 1:a bit, 2:a whole lot, 3:a whole ton
    public int UsedLuckyPlace { get => Data[0x27]; set => Data[0x27] = (byte)value; } // 1:GTS, ... 7:haunted house
    public uint UsedFlags { get => ReadUInt32LittleEndian(Data[0x28..]); set => WriteUInt32LittleEndian(Data[0x28..], value); }
    public uint UsedRandStat { get => ReadUInt32LittleEndian(Data[0x2C..]); set => WriteUInt32LittleEndian(Data[0x2C..], value); }

    public int NPC { get => Math.Max(0, ReadInt32LittleEndian(Data[0x30..])); set => WriteInt32LittleEndian(Data[0x30..], Math.Max(0, value)); }
    public Span<byte> TrainerFesID => Data.Slice(0x34, 0xC);
    public void ClearTrainerFesID() => TrainerFesID.Clear();
    public int ExchangeLeftCount { get => Data[0x40]; set => Data[0x40] = (byte)value; } // used when Type=Exchange

    public int GetMessage(int index) => index switch
    {
        0 => MessageMeet,
        1 => MessagePart,
        2 => MessageMoved,
        3 => MessageDisappointed,
        _ => 0,
    };

    public int SetMessage(int index, ushort value) => index switch
    {
        0 => MessageMeet = value,
        1 => MessagePart = value,
        2 => MessageMoved = value,
        3 => MessageDisappointed = value,
        _ => -1,
    };
}