namespace PKHeX.Core
{
    /// <summary>
    /// Game Version ID enum shared between actual Version IDs and lumped version groupings.
    /// </summary>
    public enum GameVersion
    {
        #region Indicators for method empty arguments & result indication. Not stored values.
        Invalid = -2,
        Any = -1,
        Unknown = 0,
        #endregion

        // The following values are IDs stored within PKM data, and can also identify individual games.

        #region Gen3
        /// <summary>
        /// Pokémon Sapphire (GBA)
        /// </summary>
        S = 1,

        /// <summary>
        /// Pokémon Ruby (GBA)
        /// </summary>
        R = 2,

        /// <summary>
        /// Pokémon Emerald (GBA)
        /// </summary>
        E = 3,

        /// <summary>
        /// Pokémon FireRed (GBA)
        /// </summary>
        FR = 4,

        /// <summary>
        /// Pokémon LeafGreen (GBA)
        /// </summary>
        LG = 5,

        /// <summary>
        /// Pokémon Colosseum &amp; Pokémon XD (GameCube)
        /// </summary>
        CXD = 15,
        #endregion

        #region Gen4
        /// <summary>
        /// Pokémon Diamond (NDS)
        /// </summary>
        D = 10,

        /// <summary>
        /// Pokémon Pearl (NDS)
        /// </summary>
        P = 11,

        /// <summary>
        /// Pokémon Platinum (NDS)
        /// </summary>
        Pt = 12,

        /// <summary>
        /// Pokémon Heart Gold (NDS)
        /// </summary>
        HG = 7,

        /// <summary>
        /// Pokémon Soul Silver (NDS)
        /// </summary>
        SS = 8,
        #endregion

        #region Gen5
        /// <summary>
        /// Pokémon White (NDS)
        /// </summary>
        W = 20,

        /// <summary>
        /// Pokémon Black (NDS)
        /// </summary>
        B = 21,

        /// <summary>
        /// Pokémon White 2 (NDS)
        /// </summary>
        W2 = 22,

        /// <summary>
        /// Pokémon Black 2 (NDS)
        /// </summary>
        B2 = 23,
        #endregion

        #region Gen6
        /// <summary>
        /// Pokémon X (3DS)
        /// </summary>
        X = 24,

        /// <summary>
        /// Pokémon Y (3DS)
        /// </summary>
        Y = 25,

        /// <summary>
        /// Pokémon Alpha Sapphire (3DS)
        /// </summary>
        AS = 26,

        /// <summary>
        /// Pokémon Omega Ruby (3DS)
        /// </summary>
        OR = 27,
        #endregion

        #region Gen7
        /// <summary>
        /// Pokémon Sun (3DS)
        /// </summary>
        SN = 30,

        /// <summary>
        /// Pokémon Moon (3DS)
        /// </summary>
        MN = 31,

        /// <summary>
        /// Pokémon Ultra Sun (3DS)
        /// </summary>
        US = 32,

        /// <summary>
        /// Pokémon Ultra Moon (3DS)
        /// </summary>
        UM = 33,
        #endregion

        /// <summary>
        /// Pokémon GO (GO -> Lets Go transfers)
        /// </summary>
        GO = 34,

        #region Virtual Console (3DS) Gen1
        /// <summary>
        /// Pokémon Red (3DS Virtual Console)
        /// </summary>
        RD = 35,

        /// <summary>
        /// Pokémon Green[JP]/Blue[INT] (3DS Virtual Console)
        /// </summary>
        GN = 36,

        /// <summary>
        /// Pokémon Blue[JP] (3DS Virtual Console)
        /// </summary>
        BU = 37,

        /// <summary>
        /// Pokémon Yellow [JP] (3DS Virtual Console)
        /// </summary>
        YW = 38,
        #endregion

        #region Virtual Console (3DS) Gen2
        /// <summary>
        /// Pokémon Gold (3DS Virtual Console)
        /// </summary>
        GD = 39,

        /// <summary>
        /// Pokémon Silver (3DS Virtual Console)
        /// </summary>
        SV = 40,

        /// <summary>
        /// Pokémon Crystal (3DS Virtual Console)
        /// </summary>
        C = 41,
        #endregion

        #region Nintendo Switch
        /// <summary>
        /// Pokémon Let's Go Pikachu (NX)
        /// </summary>
        GP = 42,

        /// <summary>
        /// Pokémon Let's Go Eevee (NX)
        /// </summary>
        GE = 43,
        #endregion

        // The following values are not actually stored values in pkm data,
        // These values are assigned within PKHeX as properties for various logic branching.

        #region Game Groupings (SaveFile type, roughly)
        /// <summary>
        /// Pokémon Red &amp; Blue [<see cref="SAV1"/>] identifier.
        /// </summary>
        /// <seealso cref="RD"/>
        /// <seealso cref="GN"/>
        /// <seealso cref="BU"/>
        RB,

        /// <summary>
        /// Pokémon Red/Blue/Yellow [<see cref="SAV1"/>] identifier.
        /// </summary>
        /// <see cref="RD"/>
        /// <see cref="GN"/>
        /// <see cref="BU"/>
        /// <see cref="YW"/>
        RBY,

        /// <summary>
        /// Pokémon Gold &amp; Silver [<see cref="SAV2"/>] identifier.
        /// </summary>
        /// <see cref="GD"/>
        /// <see cref="SV"/>
        GS,

        /// <summary>
        /// Pokémon Gold/Silver/Crystal [<see cref="SAV2"/>] identifier.
        /// </summary>
        /// <see cref="GD"/>
        /// <see cref="SV"/>
        /// <see cref="C"/>
        GSC,

        /// <summary>
        /// Pokémon Ruby &amp; Sapphire [<see cref="SAV3"/>] identifier.
        /// </summary>
        /// <see cref="R"/>
        /// <see cref="S"/>
        RS,

        /// <summary>
        /// Pokémon Ruby/Sapphire/Emerald [<see cref="SAV3"/>] identifier.
        /// </summary>
        /// <see cref="R"/>
        /// <see cref="S"/>
        /// <see cref="E"/>
        RSE,

        /// <summary>
        /// Pokémon FireRed/LeafGreen [<see cref="SAV3"/>] identifier.
        /// </summary>
        /// <see cref="FR"/>
        /// <see cref="LG"/>
        FRLG,

        /// <summary>
        /// Pokémon Box Ruby &amp; Sapphire [<see cref="SAV3RSBox"/>] identifier.
        /// </summary>
        RSBOX,

        /// <summary>
        /// Pokémon Colosseum [<see cref="SAV3Colosseum"/>] identifier.
        /// </summary>
        /// <see cref="CXD"/>
        /// <remarks>Also used to mark Colosseum-only origin data as this game shares a version ID with <see cref="XD"/></remarks>
        COLO,

        /// <summary>
        /// Pokémon XD [<see cref="SAV3XD"/>] identifier.
        /// </summary>
        /// <see cref="CXD"/>
        /// <remarks>Also used to mark XD-only origin data as this game shares a version ID with <see cref="COLO"/></remarks>
        XD,

        /// <summary>
        /// Pokémon Diamond &amp; Pearl [<see cref="SAV4"/>] identifier.
        /// </summary>
        /// <see cref="D"/>
        /// <see cref="P"/>
        DP,

        /// <summary>
        /// Pokémon Diamond/Pearl/Platinum version group.
        /// </summary>
        /// <remarks>Used to lump data from the associated games as data assets are shared.</remarks>
        /// <see cref="D"/>
        /// <see cref="P"/>
        /// <see cref="Pt"/>
        DPPt,

        /// <summary>
        /// Pokémon Heart Gold &amp; Soul Silver [<see cref="SAV4"/>] identifier.
        /// </summary>
        /// <see cref="HG"/>
        /// <see cref="SS"/>
        HGSS,

        /// <summary>
        /// Pokémon Battle Revolution [<see cref="SAV4BR"/>] identifier.
        /// </summary>
        BATREV,

        /// <summary>
        /// Pokémon Black &amp; White version group.
        /// </summary>
        /// <remarks>Used to lump data from the associated games as data assets are shared.</remarks>
        /// <see cref="B"/>
        /// <see cref="W"/>
        BW,

        /// <summary>
        /// Pokémon Black 2 &amp; White 2 version group.
        /// </summary>
        /// <remarks>Used to lump data from the associated games as data assets are shared.</remarks>
        /// <see cref="B2"/>
        /// <see cref="W2"/>
        B2W2,

        /// <summary>
        /// Pokémon X &amp; Y
        /// </summary>
        /// <remarks>Used to lump data from the associated games as data assets are shared.</remarks>
        /// <see cref="X"/>
        /// <see cref="Y"/>
        XY,

        /// <summary>
        /// Pokémon Omega Ruby &amp; Alpha Sapphire Demo [<see cref="SAV7"/>] identifier.
        /// </summary>
        /// <see cref="ORAS"/>
        ORASDEMO,

        /// <summary>
        /// Pokémon Omega Ruby &amp; Alpha Sapphire version group.
        /// </summary>
        /// <see cref="OR"/>
        /// <see cref="AS"/>
        /// <remarks>Used to lump data from the associated games as data assets are shared.</remarks>
        ORAS,

        /// <summary>
        /// Pokémon Sun &amp; Moon
        /// </summary>
        /// <remarks>Used to lump data from the associated games as data assets are shared.</remarks>
        /// <see cref="SN"/>
        /// <see cref="MN"/>
        SM,

        /// <summary>
        /// Pokémon Ultra Sun &amp; Ultra Moon
        /// </summary>
        /// <remarks>Used to lump data from the associated games as data assets are shared.</remarks>
        /// <see cref="US"/>
        /// <see cref="UM"/>
        USUM,

        /// <summary>
        /// Pokémon Let's Go Pikachu &amp; Eevee
        /// </summary>
        /// <remarks>Used to lump data from the associated games as data assets are shared.</remarks>
        /// <see cref="GP"/>
        /// <see cref="GE"/>
        GG,

        /// <summary>
        /// Generation 1 Games
        /// </summary>
        /// <see cref="RBY"/>
        Gen1,

        /// <summary>
        /// Generation 2 Games
        /// </summary>
        /// <see cref="GSC"/>
        Gen2,

        /// <summary>
        /// Generation 3 Games
        /// </summary>
        /// <see cref="RSE"/>
        /// <see cref="FRLG"/>
        Gen3,

        /// <summary>
        /// Generation 4 Games
        /// </summary>
        /// <see cref="DPPt"/>
        /// <see cref="HGSS"/>
        Gen4,

        /// <summary>
        /// Generation 5 Games
        /// </summary>
        /// <see cref="BW"/>
        /// <see cref="B2W2"/>
        Gen5,

        /// <summary>
        /// Generation 6 Games
        /// </summary>
        /// <see cref="XY"/>
        /// <see cref="ORAS"/>
        Gen6,

        /// <summary>
        /// Generation 7 Games
        /// </summary>
        /// <see cref="SM"/>
        /// <see cref="USUM"/>
        Gen7,

        /// <summary>
        /// Generation 1/2 Game Boy Cartridge Era Only
        /// </summary>
        /// <remarks>
        /// Since the original run of <see cref="RBY"/> and <see cref="GSC"/> could not transfer to future games,
        /// any special encounters (event data) can only be allowed if the savedata originated from that era.
        /// </remarks>
        GBCartEraOnly,

        /// <summary>
        /// Pokémon Stadium data origin identifier
        /// </summary>
        /// <see cref="GBCartEraOnly"/>
        Stadium,

        /// <summary>
        /// Pokémon Stadium 2 data origin identifier
        /// </summary>
        /// <see cref="GBCartEraOnly"/>
        Stadium2,

        /// <summary>
        /// Generation 1 Game Boy Cartridge Era Only data origin identifier
        /// </summary>
        EventsGBGen1,

        /// <summary>
        /// Generation 2 Game Boy Cartridge Era Only data origin identifier
        /// </summary>
        EventsGBGen2,

        /// <summary>
        /// Generation 1/2 3DS Virtual Console data origin identifier
        /// </summary>
        VCEvents,
        #endregion
    }
}