PKHeX/PKHeX.Core/Game/Enums/GCVersion.cs

namespace PKHeX.Core;

/// <summary>
/// <see cref="GameVersion"/> analogues used by Colosseum/XD instead of the main-series values.
/// </summary>
public enum GCVersion : byte
{
    None = 0,
    FR = 1,
    LG = 2,
    S = 8,
    R = 9,
    E = 10,
    CXD = 11,
}

/// <summary>
/// Console region analogues used by Colosseum/XD to track the region of the data.
/// </summary>
public enum GCRegion : byte
{
    NoRegion = 0,
    NTSC_J = 1,
    NTSC_U = 2,
    PAL = 3,
}

/// <summary>
/// Extension methods for <see cref="GCVersion"/> and <see cref="GCRegion"/>.
/// </summary>
public static class GCVersionExtensions
{
    /// <summary>
    /// Translates a main-series <see cref="GameVersion"/> to the corresponding <see cref="GCVersion"/> value.
    /// </summary>
    /// <param name="gbaVersion">Version ID while present in the main-series games</param>
    /// <returns>Version ID while present in the GameCube games</returns>
    public static GCVersion GetCXDVersionID(this GameVersion gbaVersion) => gbaVersion switch
    {
        GameVersion.S => GCVersion.S,
        GameVersion.R => GCVersion.R,
        GameVersion.E => GCVersion.E,
        GameVersion.FR => GCVersion.FR,
        GameVersion.LG => GCVersion.LG,
        GameVersion.CXD => GCVersion.CXD,
        _ => GCVersion.None,
    };

    /// <summary>
    /// Translates a <see cref="GCVersion"/> to the corresponding main-series <see cref="GameVersion"/> value.
    /// </summary>
    /// <param name="gcVersion">Version ID while present in the GameCube games</param>
    /// <returns>Version ID while present in the main-series games</returns>
    public static GameVersion GetG3VersionID(this GCVersion gcVersion) => gcVersion switch
    {
        GCVersion.S => GameVersion.S,
        GCVersion.R => GameVersion.R,
        GCVersion.E => GameVersion.E,
        GCVersion.FR => GameVersion.FR,
        GCVersion.LG => GameVersion.LG,
        GCVersion.CXD => GameVersion.CXD,
        _ => GameVersion.Unknown,
    };
}