PKHeX/PKHeX.Core/Items/ItemStorage3FRLG.cs

using System;

namespace PKHeX.Core;

public sealed class ItemStorage3FRLG : IItemStorage
{
    public static readonly ItemStorage3FRLG Instance = new();

    private static ReadOnlySpan<ushort> Pouch_Key_FRLG => new ushort[]
    {
        // R/S
        259, 260, 261, 262, 263, 264, 265, 266, 268, 269, 270, 271, 272, 273, 274, 275, 276, 277, 278, 279, 280, 281, 282, 283, 284, 285, 286, 287, 288,
        // FR/LG
        349, 350, 351, 352, 353, 354, 355, 356, 357, 358, 359, 360, 361, 362, 363, 364, 365, 366, 367, 368, 369, 370, 371, 372, 373, 374,
    };

    private static readonly ushort[] PCItems = ArrayUtil.ConcatAll(ItemStorage3RS.Pouch_Items_RS, Pouch_Key_FRLG,
        ItemStorage3RS.Pouch_Ball_RS, ItemStorage3RS.Pouch_TMHM_RS, ItemStorage3RS.Pouch_Berries_RS);

    public bool IsLegal(InventoryType type, int itemIndex, int itemCount) => true;

    public ReadOnlySpan<ushort> GetItems(InventoryType type) => type switch
    {
        InventoryType.Items => ItemStorage3RS.Pouch_Items_RS,
        InventoryType.KeyItems => Pouch_Key_FRLG,
        InventoryType.Balls => ItemStorage3RS.Pouch_Ball_RS,
        InventoryType.TMHMs => ItemStorage3RS.Pouch_TMHM_RS,
        InventoryType.Berries => ItemStorage3RS.Pouch_Berries_RS,
        InventoryType.PCItems => PCItems,
        _ => throw new ArgumentOutOfRangeException(nameof(type), type, null),
    };
}