mirror of
https://github.com/kwsch/PKHeX
synced 2024-12-13 22:22:34 +00:00
5bcccc6d92
* Revises legality checks to account for traveling between the three game islands (PLA/BDSP/SWSH) * Adds conversion mechanisms between the three formats, as well as flexible conversion options to backfill missing data (thanks GameFreak/ILCA for opting for lossy conversion instead of updating the games). * Adds API abstractions for HOME data storage format (EKH/PKH format 1, aka EH1/PH1). * Revises some APIs for better usage: - `PKM` now exposes a `Context` to indicate the isolation context for legality purposes. - Some method signatures have changed to accept `Context` or `GameVersion` instead of a vague `int` for Generation. - Evolution History is now tracked in the Legality parse for specific contexts, rather than only per generation.
567 lines
25 KiB
C#
567 lines
25 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using static PKHeX.Core.Legal;
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using static PKHeX.Core.GameVersion;
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using static PKHeX.Core.Species;
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namespace PKHeX.Core
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{
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/// <summary>
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/// Miscellaneous GB Era restriction logic for legality checking
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/// </summary>
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internal static class GBRestrictions
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{
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private static readonly int[] G1Exeggcute_IncompatibleMoves = { 78, 77, 79 };
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private static readonly int[] Stadium_CatchRate =
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{
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167, // Normal Box
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168, // Gorgeous Box
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};
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private static readonly HashSet<int> Stadium_GiftSpecies = new()
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{
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(int)Bulbasaur,
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(int)Charmander,
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(int)Squirtle,
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(int)Psyduck,
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(int)Hitmonlee,
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(int)Hitmonchan,
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(int)Eevee,
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(int)Omanyte,
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(int)Kabuto,
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};
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/// <summary>
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/// Species that have a specific minimum amount of moves based on their evolution state.
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/// </summary>
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private static readonly HashSet<int> SpecialMinMoveSlots = new()
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{
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(int)Pikachu,
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(int)Raichu,
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(int)NidoranF,
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(int)Nidorina,
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(int)Nidoqueen,
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(int)NidoranM,
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(int)Nidorino,
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(int)Nidoking,
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(int)Clefable,
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(int)Ninetales,
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(int)Wigglytuff,
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(int)Arcanine,
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(int)Cloyster,
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(int)Exeggutor,
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(int)Tangela,
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(int)Starmie,
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};
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internal static bool TypeIDExists(int type) => Types_Gen1.Contains(type);
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/// <summary>
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/// Valid type IDs extracted from the Personal Table used for R/G/B/Y games.
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/// </summary>
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private static readonly HashSet<int> Types_Gen1 = new()
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{
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0, 1, 2, 3, 4, 5, 7, 8, 20, 21, 22, 23, 24, 25, 26,
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};
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/// <summary>
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/// Species that have a catch rate value that is different from their pre-evolutions, and cannot be obtained directly.
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/// </summary>
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internal static readonly HashSet<int> Species_NotAvailable_CatchRate = new()
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{
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(int)Butterfree,
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(int)Pidgeot,
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(int)Nidoqueen,
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(int)Nidoking,
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(int)Ninetales,
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(int)Vileplume,
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(int)Persian,
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(int)Arcanine,
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(int)Poliwrath,
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(int)Alakazam,
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(int)Machamp,
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(int)Victreebel,
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(int)Rapidash,
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(int)Cloyster,
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(int)Exeggutor,
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(int)Starmie,
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(int)Dragonite,
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};
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internal static readonly HashSet<int> Trade_Evolution1 = new()
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{
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(int)Kadabra,
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(int)Machoke,
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(int)Graveler,
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(int)Haunter,
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};
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public static bool RateMatchesEncounter(int species, GameVersion version, int rate)
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{
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if (version.Contains(YW))
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{
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if (rate == PersonalTable.Y[species].CatchRate)
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return true;
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if (version == YW) // no RB
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return false;
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}
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return rate == PersonalTable.RB[species].CatchRate;
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}
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private static int[] GetMinLevelLearnMoveG1(int species, List<int> moves)
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{
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var result = new int[moves.Count];
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for (int i = 0; i < result.Length; i++)
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result[i] = MoveLevelUp.GetIsLevelUp1(species, 0, moves[i], 100, 0).Level;
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return result;
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}
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private static int[] GetMaxLevelLearnMoveG1(int species, List<int> moves)
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{
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var result = new int[moves.Count];
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int index = PersonalTable.RB.GetFormIndex(species, 0);
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if (index == 0)
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return result;
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var pi_rb = ((PersonalInfoG1)PersonalTable.RB[index]).Moves;
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var pi_y = ((PersonalInfoG1)PersonalTable.Y[index]).Moves;
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for (int m = 0; m < moves.Count; m++)
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{
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bool start = pi_rb.Contains(moves[m]) && pi_y.Contains(moves[m]);
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result[m] = start ? 1 : Math.Max(GetHighest(LevelUpRB), GetHighest(LevelUpY));
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int GetHighest(IReadOnlyList<Learnset> learn) => learn[index].GetLevelLearnMove(moves[m]);
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}
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return result;
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}
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private static List<int>[] GetExclusiveMovesG1(int species1, int species2, IEnumerable<int> tmhm, IEnumerable<int> moves)
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{
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// Return from two species the exclusive moves that only one could learn and also the current pokemon have it in its current moveset
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var moves1 = MoveLevelUp.GetMovesLevelUp1(species1, 0, 1, 100);
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var moves2 = MoveLevelUp.GetMovesLevelUp1(species2, 0, 1, 100);
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// Remove common moves and remove tmhm, remove not learned moves
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var common = new HashSet<int>(moves1.Intersect(moves2).Concat(tmhm));
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var hashMoves = new HashSet<int>(moves);
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moves1.RemoveAll(x => !hashMoves.Contains(x) || common.Contains(x));
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moves2.RemoveAll(x => !hashMoves.Contains(x) || common.Contains(x));
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return new[] { moves1, moves2 };
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}
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internal static void GetIncompatibleEvolutionMoves(PKM pkm, IReadOnlyList<int> moves, IReadOnlyList<int> tmhm, out int previousspecies, out IList<int> incompatible_previous, out IList<int> incompatible_current)
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{
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switch (pkm.Species)
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{
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case (int)Nidoking when moves.Contains(31) && moves.Contains(37):
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// Nidoking learns Thrash at level 23
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// Nidorino learns Fury Attack at level 36, Nidoran♂ at level 30
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// Other moves are either learned by Nidoran♂ up to level 23 or by TM
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incompatible_current = new[] { 31 };
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incompatible_previous = new[] { 37 };
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previousspecies = 33;
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return;
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case (int)Exeggutor when moves.Contains(23) && moves.Any(m => G1Exeggcute_IncompatibleMoves.Contains(m)):
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// Exeggutor learns Stomp at level 28
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// Exeggcute learns Stun Spore at 32, PoisonPowder at 37 and Sleep Powder at 48
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incompatible_current = new[] { 23 };
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incompatible_previous = G1Exeggcute_IncompatibleMoves;
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previousspecies = 103;
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return;
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case (int)Vaporeon or (int)Jolteon or (int)Flareon:
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incompatible_previous = new List<int>();
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incompatible_current = new List<int>();
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previousspecies = 133;
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var ExclusiveMoves = GetExclusiveMovesG1((int)Eevee, pkm.Species, tmhm, moves);
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var EeveeLevels = GetMinLevelLearnMoveG1((int)Eevee, ExclusiveMoves[0]);
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var EvoLevels = GetMaxLevelLearnMoveG1(pkm.Species, ExclusiveMoves[1]);
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for (int i = 0; i < ExclusiveMoves[0].Count; i++)
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{
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// There is a evolution move with a lower level that current Eevee move
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var el = EeveeLevels[i];
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if (EvoLevels.Any(ev => ev < el))
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incompatible_previous.Add(ExclusiveMoves[0][i]);
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}
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for (int i = 0; i < ExclusiveMoves[1].Count; i++)
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{
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// There is an Eevee move with a greater level that current evolution move
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var el = EvoLevels[i];
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if (EeveeLevels.Any(ev => ev > el))
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incompatible_current.Add(ExclusiveMoves[1][i]);
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}
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return;
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}
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incompatible_previous = Array.Empty<int>();
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incompatible_current = Array.Empty<int>();
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previousspecies = 0;
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}
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internal static int GetRequiredMoveCount(PK1 pk, IReadOnlyList<int> moves, LegalInfo info, IReadOnlyList<int> initialmoves)
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{
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var enc = info.EncounterMatch;
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var capsuleState = IsTimeCapsuleTransferred(pk, info.Moves, enc);
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if (capsuleState != TimeCapsuleEvaluation.NotTransferred) // No Move Deleter in Gen 1
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return 1; // Move Deleter exits, slots from 2 onwards can always be empty
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if (enc is IMoveset {Moves.Count: 4 })
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return 4;
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int required = GetRequiredMoveCount(pk, moves, info.EncounterMoves.LevelUpMoves, initialmoves, enc.Species);
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if (required >= 4)
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return 4;
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// tm, hm and tutor moves replace a free slots if the pokemon have less than 4 moves
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// Ignore tm, hm and tutor moves already in the learnset table
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var learn = info.EncounterMoves.LevelUpMoves;
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var tmhm = info.EncounterMoves.TMHMMoves;
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var tutor = info.EncounterMoves.TutorMoves;
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var union = initialmoves.Union(learn[1]);
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required += moves.Count(m => m != 0 && union.All(t => t != m) && (tmhm[1].Any(t => t == m) || tutor[1].Any(t => t == m)));
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return Math.Min(4, required);
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}
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private static int GetRequiredMoveCount(PK1 pk, IReadOnlyList<int> moves, IReadOnlyList<int>[] learn, IReadOnlyList<int> initialmoves, int originalSpecies)
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{
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if (SpecialMinMoveSlots.Contains(pk.Species))
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return GetRequiredMoveCountSpecial(pk, moves, learn, originalSpecies);
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// A pokemon is captured with initial moves and can't forget any until have all 4 slots used
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// If it has learn a move before having 4 it will be in one of the free slots
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int required = GetRequiredMoveSlotsRegular(pk, moves, learn, initialmoves, originalSpecies);
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return required != 0 ? required : GetRequiredMoveCountDecrement(pk, moves, learn, initialmoves);
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}
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private static int GetRequiredMoveSlotsRegular(PK1 pk, IReadOnlyList<int> moves, IReadOnlyList<int>[] learn, IReadOnlyList<int> initialmoves, int originalSpecies)
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{
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if (originalSpecies == pk.Species)
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return 0; // Can skip over all learned moves that we can reasonably care about
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return originalSpecies switch
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{
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(int)Caterpie => initialmoves.Union(learn[1]).Distinct().Count(lm => lm != 0 && (lm != (int)Move.Harden || moves.Contains((int)Move.Harden))),
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(int)Metapod => initialmoves.Union(learn[1]).Distinct().Count(lm => lm != 0 && (lm != (int)Move.Confusion || moves.Contains((int)Move.Confusion))),
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(int)Mankey => initialmoves.Union(learn[1]).Distinct().Count(lm => lm != 0 && (lm != (int)Move.Rage || moves.Contains((int)Move.Rage))),
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_ => IsMoveCountRequired3(pk.Species, pk.CurrentLevel, moves) ? 3 : 0,
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};
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}
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private static bool IsMoveCountRequired3(int species, int level, IReadOnlyList<int> moves) => species switch
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{
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// Species that evolve and learn the 4th move as evolved species at a greater level than base species
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// The 4th move is included in the level up table set as a pre-evolution move,
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// it should be removed from the used slots count if is not the learn move
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(int)Pidgeotto => level < 21 && !moves.Contains(018), // Whirlwind
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(int)Sandslash => level < 27 && !moves.Contains(040), // Poison Sting
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(int)Parasect => level < 30 && !moves.Contains(147), // Spore
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(int)Golduck => level < 39 && !moves.Contains(093), // Confusion
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(int)Dewgong => level < 44 && !moves.Contains(156), // Rest
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(int)Weezing => level < 39 && !moves.Contains(108), // Smoke Screen
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(int)Haunter or (int)Gengar => level < 29 && !moves.Contains(095), // Hypnosis
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_ => false,
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};
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private static int GetRequiredMoveCountDecrement(PKM pk, IReadOnlyList<int> moves, IReadOnlyList<int>[] learn, IReadOnlyList<int> initialmoves)
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{
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int usedslots = initialmoves.Union(learn[1]).Where(m => m != 0).Distinct().Count();
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switch (pk.Species)
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{
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case (int)Venonat: // Venonat; ignore Venomoth (by the time Venonat evolves it will always have 4 moves)
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if (pk.CurrentLevel >= 11 && !moves.Contains(48)) // Supersonic
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usedslots--;
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if (pk.CurrentLevel >= 19 && !moves.Contains(93)) // Confusion
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usedslots--;
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break;
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case (int)Kadabra or (int)Alakazam: // Abra & Kadabra
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int catch_rate = ((PK1)pk).Catch_Rate;
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if (catch_rate != 100)// Initial Yellow Kadabra Kinesis (move 134)
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usedslots--;
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if (catch_rate == 200 && pk.CurrentLevel < 20) // Kadabra Disable, not learned until 20 if captured as Abra (move 50)
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usedslots--;
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break;
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case (int)Cubone or (int)Marowak: // Cubone & Marowak
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if (!moves.Contains((int)Move.TailWhip) && !moves.Contains((int)Move.Headbutt)) // Initial Red
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{
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usedslots -=2;
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}
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else
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{
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if (!moves.Contains(39)) // Initial Yellow Tail Whip
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usedslots--;
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if (!moves.Contains(125)) // Initial Yellow Bone Club
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usedslots--;
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}
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if (pk.Species == 105 && pk.CurrentLevel < 33 && !moves.Contains(116)) // Marowak evolved without Focus Energy
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usedslots--;
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break;
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case (int)Chansey:
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if (!moves.Contains(39)) // Yellow Initial Tail Whip
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usedslots--;
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if (!moves.Contains(3)) // Yellow Lvl 12 and Initial Red/Blue Double Slap
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usedslots--;
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break;
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case (int)Mankey when pk.CurrentLevel >= 9 && !moves.Contains(67): // Mankey (Low Kick)
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case (int)Pinsir when pk.CurrentLevel >= 21 && !moves.Contains(20): // Pinsir (Bind)
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case (int)Gyarados when pk.CurrentLevel < 32: // Gyarados
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usedslots--;
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break;
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default: return usedslots;
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}
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return usedslots;
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}
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private static int GetRequiredMoveCountSpecial(PKM pk, IReadOnlyList<int> moves, IReadOnlyList<int>[] learn, int originalSpecies)
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{
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// Species with few mandatory slots, species with stone evolutions that could evolve at lower level and do not learn any more moves
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// and Pikachu and Nidoran family, those only have mandatory the initial moves and a few have one level up moves,
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// every other move could be avoided switching game or evolving
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var mandatory = GetRequiredMoveCountLevel(pk, originalSpecies);
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switch (pk.Species)
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{
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case (int)Exeggutor when pk.CurrentLevel >= 28: // Exeggutor
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// At level 28 learn different move if is a Exeggute or Exeggutor
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if (moves.Contains(73))
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mandatory.Add(73); // Leech Seed level 28 Exeggute
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if (moves.Contains(23))
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mandatory.Add(23); // Stomp level 28 Exeggutor
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break;
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case (int)Pikachu when pk.CurrentLevel >= 33:
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mandatory.Add(97); // Pikachu always learns Agility
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break;
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case (int)Tangela:
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mandatory.Add(132); // Tangela always has Constrict as Initial Move
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break;
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}
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// Add to used slots the non-mandatory moves from the learnset table that the pokemon have learned
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return mandatory.Distinct().Count(z => z != 0) + moves.Where(m => m != 0).Count(m => !mandatory.Contains(m) && learn[1].Contains(m));
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}
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private static List<int> GetRequiredMoveCountLevel(PKM pk, int basespecies)
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{
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int species = pk.Species;
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int maxlevel = 1;
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int minlevel = 1;
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if (species == (int)Tangela) // Tangela moves before level 32 are different in RB vs Y
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{
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minlevel = 32;
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maxlevel = pk.CurrentLevel;
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}
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else if (species is >= (int)NidoranF and <= (int)Nidoking && pk.CurrentLevel >= 8)
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{
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maxlevel = 8; // Always learns a third move at level 8
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}
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if (minlevel > pk.CurrentLevel)
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return new List<int>();
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return MoveLevelUp.GetMovesLevelUp1(basespecies, 0, maxlevel, minlevel);
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}
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internal static IEnumerable<GameVersion> GetGen2Versions(IEncounterTemplate enc, bool korean)
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{
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if (ParseSettings.AllowGen2Crystal(korean) && enc.Version is C or GSC)
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yield return C;
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yield return GS;
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}
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internal static IEnumerable<GameVersion> GetGen1Versions(IEncounterTemplate enc)
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{
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if (enc.Species == (int)Eevee && enc.Version == Stadium)
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{
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// Stadium Eevee; check for RB and yellow initial moves
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yield return RB;
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yield return YW;
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yield break;
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}
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if (enc.Version == YW)
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{
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yield return YW;
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yield break;
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}
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// Any encounter marked with version RBY is for pokemon with the same moves and catch rate in RB and Y,
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// it is sufficient to check just RB's case
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yield return RB;
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}
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private static bool GetCatchRateMatchesPreEvolution(PK1 pkm, int catch_rate)
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{
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// For species catch rate, discard any species that has no valid encounters and a different catch rate than their pre-evolutions
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var table = EvolutionTree.Evolves1;
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var chain = table.GetValidPreEvolutions(pkm, maxLevel: (byte)pkm.CurrentLevel);
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foreach (var entry in chain)
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{
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var s = entry.Species;
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if (Species_NotAvailable_CatchRate.Contains(s))
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continue;
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if (catch_rate == PersonalTable.RB[s].CatchRate || catch_rate == PersonalTable.Y[s].CatchRate)
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return true;
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}
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// Krabby encounter trade special catch rate
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int species = pkm.Species;
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if (catch_rate == 204 && (species is (int)Krabby or (int)Kingler))
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return true;
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if (Stadium_GiftSpecies.Contains(species) && Stadium_CatchRate.Contains(catch_rate))
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return true;
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return false;
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}
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/// <summary>
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/// Checks if the <see cref="pkm"/> can inhabit <see cref="GameVersion.Gen1"></see>
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/// </summary>
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/// <param name="pkm">Data to check</param>
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/// <returns>true if can inhabit, false if not.</returns>
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private static bool CanInhabitGen1(this PKM pkm)
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{
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// Korean Gen2 games can't trade-back because there are no Gen1 Korean games released
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if (pkm.Korean || pkm.IsEgg)
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return false;
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// Gen2 format with met data can't receive Gen1 moves, unless Stadium 2 is used (Oak's PC).
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// If you put a Pokemon in the N64 box, the met info is retained, even if you switch over to a Gen I game to teach it TMs
|
|
// You can use rare candies from within the lab, so level-up moves from RBY context can be learned this way as well
|
|
// Stadium 2 is GB Cart Era only (not 3DS Virtual Console).
|
|
if (pkm is ICaughtData2 {CaughtData: not 0} && !ParseSettings.AllowGBCartEra)
|
|
return false;
|
|
|
|
// Sanity check species, if it could have existed as a pre-evolution.
|
|
int species = pkm.Species;
|
|
if (species <= MaxSpeciesID_1)
|
|
return true;
|
|
return EvolutionLegality.FutureEvolutionsGen1.Contains(species);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the Tradeback status depending on various values.
|
|
/// </summary>
|
|
/// <param name="pkm">Pokémon to guess the tradeback status from.</param>
|
|
internal static PotentialGBOrigin GetTradebackStatusInitial(PKM pkm)
|
|
{
|
|
if (pkm is PK1 pk1)
|
|
return GetTradebackStatusRBY(pk1);
|
|
|
|
if (pkm.Format == 2 || pkm.VC2) // Check for impossible tradeback scenarios
|
|
return !pkm.CanInhabitGen1() ? PotentialGBOrigin.Gen2Only : PotentialGBOrigin.Either;
|
|
|
|
// VC2 is released, we can assume it will be TradebackType.Any.
|
|
// Is impossible to differentiate a VC1 pokemon traded to Gen7 after VC2 is available.
|
|
// Met Date cannot be used definitively as the player can change their system clock.
|
|
return PotentialGBOrigin.Either;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the Tradeback status depending on the <see cref="PK1.Catch_Rate"/>
|
|
/// </summary>
|
|
/// <param name="pkm">Pokémon to guess the tradeback status from.</param>
|
|
private static PotentialGBOrigin GetTradebackStatusRBY(PK1 pkm)
|
|
{
|
|
if (!ParseSettings.AllowGen1Tradeback)
|
|
return PotentialGBOrigin.Gen1Only;
|
|
|
|
// Detect tradeback status by comparing the catch rate(Gen1)/held item(Gen2) to the species in the pkm's evolution chain.
|
|
var catch_rate = pkm.Catch_Rate;
|
|
if (catch_rate == 0)
|
|
return PotentialGBOrigin.Either;
|
|
|
|
bool matchAny = GetCatchRateMatchesPreEvolution(pkm, catch_rate);
|
|
|
|
if (!matchAny)
|
|
return PotentialGBOrigin.Either;
|
|
|
|
if (HeldItems_GSC.Contains((ushort)catch_rate))
|
|
return PotentialGBOrigin.Either;
|
|
|
|
return PotentialGBOrigin.Gen1Only;
|
|
}
|
|
|
|
public static TimeCapsuleEvaluation IsTimeCapsuleTransferred(PKM pkm, IList<CheckMoveResult> moves, IEncounterTemplate enc)
|
|
{
|
|
// ReSharper disable once ConditionIsAlwaysTrueOrFalse
|
|
if (moves.Any(z => z != null && z.Generation != enc.Generation && z.Generation <= 2))
|
|
{
|
|
if (pkm is PK1 {Catch_Rate: not 0} g1 && !IsTradebackCatchRate(g1.Catch_Rate))
|
|
return TimeCapsuleEvaluation.BadCatchRate;
|
|
return enc.Generation == 2 ? TimeCapsuleEvaluation.Transferred21 : TimeCapsuleEvaluation.Transferred12;
|
|
}
|
|
|
|
if (pkm is not GBPKM gb)
|
|
{
|
|
return enc.Generation switch
|
|
{
|
|
2 when pkm.VC2 => TimeCapsuleEvaluation.Transferred21,
|
|
1 when pkm.VC1 => TimeCapsuleEvaluation.Transferred12,
|
|
_ => TimeCapsuleEvaluation.NotTransferred,
|
|
};
|
|
}
|
|
|
|
if (gb is ICaughtData2 pk2)
|
|
{
|
|
if (enc.Generation == 1)
|
|
return TimeCapsuleEvaluation.Transferred12;
|
|
if (pk2.CaughtData != 0)
|
|
return TimeCapsuleEvaluation.NotTransferred;
|
|
if (enc.Version == C)
|
|
return TimeCapsuleEvaluation.Transferred21;
|
|
return TimeCapsuleEvaluation.Indeterminate;
|
|
}
|
|
|
|
if (gb is PK1 pk1)
|
|
{
|
|
var rate = pk1.Catch_Rate;
|
|
if (rate == 0)
|
|
return TimeCapsuleEvaluation.Transferred12;
|
|
|
|
bool isTradebackItem = IsTradebackCatchRate(rate);
|
|
if (IsCatchRateMatchEncounter(enc, pk1))
|
|
return isTradebackItem ? TimeCapsuleEvaluation.Indeterminate : TimeCapsuleEvaluation.NotTransferred;
|
|
return isTradebackItem ? TimeCapsuleEvaluation.Transferred12 : TimeCapsuleEvaluation.BadCatchRate;
|
|
}
|
|
return TimeCapsuleEvaluation.Indeterminate;
|
|
}
|
|
|
|
private static bool IsCatchRateMatchEncounter(IEncounterTemplate enc, PK1 pk1) => enc switch
|
|
{
|
|
EncounterStatic1 s when s.GetMatchRating(pk1) != EncounterMatchRating.PartialMatch => true,
|
|
EncounterTrade1 => true,
|
|
_ => RateMatchesEncounter(enc.Species, enc.Version, pk1.Catch_Rate),
|
|
};
|
|
|
|
public static bool IsTradebackCatchRate(int rate)
|
|
{
|
|
return HeldItems_GSC.Contains((ushort)rate);
|
|
}
|
|
}
|
|
|
|
public enum PotentialGBOrigin
|
|
{
|
|
Either,
|
|
Gen1Only,
|
|
Gen2Only,
|
|
}
|
|
|
|
public enum TimeCapsuleEvaluation
|
|
{
|
|
Indeterminate,
|
|
Transferred21,
|
|
Transferred12,
|
|
NotTransferred,
|
|
BadCatchRate,
|
|
}
|
|
|
|
public static class TimeCapsuleEvlautationExtensions
|
|
{
|
|
public static bool WasTimeCapsuleTransferred(this TimeCapsuleEvaluation eval) => eval is not (TimeCapsuleEvaluation.Indeterminate or TimeCapsuleEvaluation.NotTransferred or TimeCapsuleEvaluation.BadCatchRate);
|
|
}
|
|
}
|