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

namespace PKHeX.Core;

/// <summary>
/// Generation 4 Chatter Recording
/// </summary>
public sealed class Chatter4: IChatter
{
    private readonly SAV4 SAV;
    private readonly int Offset;

    public Chatter4(SaveFile sav)
    {
        SAV = (SAV4)sav;
        Offset = SAV.Chatter;
    }

    public bool Initialized
    {
        get => ReadUInt32LittleEndian(SAV.General[Offset..]) == 1u;
        set => WriteUInt32LittleEndian(SAV.General[Offset..], value ? 1u : 0u);
    }

    public Span<byte> Recording => SAV.General.Slice(Offset + sizeof(uint), IChatter.SIZE_PCM);

    public int ConfusionChance
    {
        get => !Initialized ? 1 : (sbyte)Recording[15] switch
        {
            < -30 => 11,
            >= 30 => 31,
            _ => 1,
        };
    }
}