mirror of
https://github.com/kwsch/PKHeX
synced 2024-11-23 12:33:06 +00:00
437 lines
18 KiB
C#
437 lines
18 KiB
C#
using System.Collections.Generic;
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using static PKHeX.Core.LegalityCheckStrings;
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namespace PKHeX.Core
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{
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/// <summary>
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/// Verifies the <see cref="PKM.Ability"/> values.
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/// </summary>
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public sealed class AbilityVerifier : Verifier
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{
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protected override CheckIdentifier Identifier => CheckIdentifier.Ability;
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public override void Verify(LegalityAnalysis data)
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{
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var result = VerifyAbility(data);
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data.AddLine(result);
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}
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private CheckResult VALID => GetValid(LAbilityFlag);
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private CheckResult INVALID => GetInvalid(LAbilityMismatch);
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private enum AbilityState : byte
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{
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CanMismatch,
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MustMatch,
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}
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private CheckResult VerifyAbility(LegalityAnalysis data)
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{
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var pkm = data.pkm;
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var pi = data.PersonalInfo;
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// Check ability is possible (within bounds)
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int ability = pkm.Ability;
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int abilval = pi.GetAbilityIndex(ability);
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if (abilval < 0)
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return GetInvalid(LAbilityUnexpected);
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var abilities = pi.Abilities;
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int format = pkm.Format;
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if (format >= 6)
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{
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// Check AbilityNumber is a single set bit
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var num = pkm.AbilityNumber;
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if (!(num != 0 && (num & (num - 1)) == 0)) // not [!zero, and power of 2]
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return GetInvalid(LAbilityMismatchFlag);
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// Check AbilityNumber points to ability
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int an = num >> 1;
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if (an >= abilities.Count || abilities[an] != ability)
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return GetInvalid(LAbilityMismatchFlag);
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// Check AbilityNumber for transfers without unique abilities
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int gen = data.Info.Generation;
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if (gen is 3 or 4 or 5 && num != 4)
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{
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// To determine AbilityNumber [PK5->PK6], check if the first ability in Personal matches the ability.
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// It is not possible to flip it to the other index as capsule requires unique abilities.
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if (abilities[0] == abilities[1] && num != 1)
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return GetInvalid(LAbilityMismatchFlag);
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}
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}
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if (format >= 8) // Ability Patch
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{
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if (pkm.AbilityNumber == 4 && CanAbilityPatch(format, abilities, pkm.Species))
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return GetValid(LAbilityPatchUsed);
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}
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var enc = data.EncounterMatch;
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if (enc is MysteryGift {Generation: >= 4} g)
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return VerifyAbilityMG(data, g, abilities);
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if (format < 6)
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return VerifyAbility345(data, enc, abilities, abilval);
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return VerifyAbility(data, abilities, abilval);
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}
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private CheckResult VerifyAbility(LegalityAnalysis data, IReadOnlyList<int> abilities, int abilnum)
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{
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var enc = data.EncounterMatch;
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var eabil = GetEncounterFixedAbilityNumber(enc);
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if (eabil >= 0)
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{
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if ((data.pkm.AbilityNumber == 4) != (eabil == 4))
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return GetInvalid(LAbilityHiddenFail);
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if (eabil > 0)
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return VerifyFixedAbility(data, abilities, AbilityState.CanMismatch, eabil, abilnum);
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}
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var gen = data.Info.Generation;
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return gen switch
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{
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5 => VerifyAbility5(data, enc, abilities),
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6 => VerifyAbility6(data, enc),
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7 => VerifyAbility7(data, enc),
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8 => VerifyAbility8(data, enc),
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_ => CheckMatch(data.pkm, abilities, gen, AbilityState.CanMismatch)
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};
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}
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private CheckResult VerifyAbility345(LegalityAnalysis data, IEncounterable enc, IReadOnlyList<int> abilities, int abilnum)
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{
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var pkm = data.pkm;
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int format = pkm.Format;
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var state = AbilityState.MustMatch;
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if (3 <= format && format <= 5 && abilities[0] != abilities[1]) // 3-4/5 and have 2 distinct abilities now
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state = VerifyAbilityPreCapsule(data, abilities);
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var EncounterMatch = data.EncounterMatch;
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int eabil = GetEncounterFixedAbilityNumber(EncounterMatch);
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if (eabil >= 0)
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{
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if ((pkm.AbilityNumber == 4) != (eabil == 4))
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return GetInvalid(LAbilityHiddenFail);
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if (eabil > 0)
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return VerifyFixedAbility(data, abilities, state, eabil, abilnum);
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}
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int gen = data.Info.Generation;
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if (gen == 5)
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return VerifyAbility5(data, enc, abilities);
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return CheckMatch(pkm, abilities, gen, state);
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}
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private CheckResult VerifyFixedAbility(LegalityAnalysis data, IReadOnlyList<int> abilities, AbilityState state, int EncounterAbility, int abilval)
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{
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var pkm = data.pkm;
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if (data.Info.EncounterMatch.Generation >= 6)
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{
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if (IsAbilityCapsuleModified(pkm, abilities, EncounterAbility))
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return GetValid(LAbilityCapsuleUsed);
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if (pkm.AbilityNumber != EncounterAbility)
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return INVALID;
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return VALID;
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}
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if ((pkm.AbilityNumber == 4) != (EncounterAbility == 4))
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return GetInvalid(LAbilityHiddenFail);
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if (data.EncounterMatch.Species != pkm.Species && state != AbilityState.CanMismatch) // evolved
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return CheckMatch(pkm, abilities, data.Info.Generation, AbilityState.MustMatch);
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if (EncounterAbility == 1 << abilval)
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return GetValid(LAbilityFlag);
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if (pkm.AbilityNumber == EncounterAbility)
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return VALID;
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if (state == AbilityState.CanMismatch || EncounterAbility == 0)
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return CheckMatch(pkm, abilities, data.Info.Generation, AbilityState.MustMatch);
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if (IsAbilityCapsuleModified(pkm, abilities, EncounterAbility))
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return GetValid(LAbilityCapsuleUsed);
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return INVALID;
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}
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private AbilityState VerifyAbilityPreCapsule(LegalityAnalysis data, IReadOnlyList<int> abilities)
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{
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var pkm = data.pkm;
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// CXD pokemon can have any ability without matching PID
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if (pkm.Version == (int)GameVersion.CXD && pkm.Format == 3)
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return AbilityState.CanMismatch;
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// Gen3 native or Gen4/5 origin
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if (pkm.Format == 3 || !pkm.InhabitedGeneration(3))
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return AbilityState.MustMatch;
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// Evovled in Gen4/5
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if (pkm.Species > Legal.MaxSpeciesID_3)
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return AbilityState.MustMatch;
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// If the species could not exist in Gen3, must match.
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if (data.Info.EvoChainsAllGens[3].Count == 0)
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return AbilityState.MustMatch;
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// Fall through when gen3 pkm transferred to gen4/5
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return VerifyAbilityGen3Transfer(data, abilities, data.Info.EvoChainsAllGens[3][0].Species);
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}
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private AbilityState VerifyAbilityGen3Transfer(LegalityAnalysis data, IReadOnlyList<int> abilities, int maxGen3Species)
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{
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var pkm = data.pkm;
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var pers = (PersonalInfoG3)PersonalTable.E[maxGen3Species];
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if (pers.Ability1 != pers.Ability2) // Excluding Colosseum/XD, a Gen3 pkm must match PID if it has 2 unique abilities
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return pkm.Version == (int) GameVersion.CXD ? AbilityState.CanMismatch : AbilityState.MustMatch;
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if (pkm.Species != maxGen3Species) // it has evolved in either gen 4 or gen 5; the ability must match PID
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return AbilityState.MustMatch;
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var chain = data.Info.EvoChainsAllGens;
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bool evolved45 = chain[4].Count > 1 || (pkm.Format == 5 && chain[5].Count > 1);
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if (evolved45)
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{
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if (pkm.Ability == pers.Ability1) // Could evolve in Gen4/5 and have a Gen3 only ability
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return AbilityState.CanMismatch; // Not evolved in Gen4/5, doesn't need to match PIDAbility
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if (pkm.Ability == abilities[1]) // It could evolve in Gen4/5 and have Gen4 second ability
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return AbilityState.MustMatch; // Evolved in Gen4/5, must match PIDAbility
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}
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// If we reach here, it has not evolved in Gen4/5 games or has an invalid ability.
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// The ability does not need to match the PIDAbility, but only Gen3 ability is allowed.
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if (pkm.Ability != pers.Ability1) // Not evolved in Gen4/5, but doesn't have Gen3 only ability
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data.AddLine(GetInvalid(LAbilityMismatch3)); // probably bad to do this here
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return AbilityState.CanMismatch;
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}
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private CheckResult VerifyAbilityMG(LegalityAnalysis data, MysteryGift g, IReadOnlyList<int> abilities)
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{
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if (g is PCD d)
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return VerifyAbilityPCD(data, abilities, d);
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var pkm = data.pkm;
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if (g is PGT) // Ranger Manaphy
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return (pkm.Format >= 6 ? (pkm.AbilityNumber == 1) : (pkm.AbilityNumber < 4)) ? VALID : GetInvalid(LAbilityMismatchGift);
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var cardType = g.AbilityType;
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if (cardType == 4) // 1/2/H
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return VALID;
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int abilNumber = pkm.AbilityNumber;
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if (cardType == 3) // 1/2
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return abilNumber == 4 ? GetInvalid(LAbilityMismatchGift) : VALID;
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// Only remaining matches are fixed index abilities
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int cardAbilIndex = 1 << cardType;
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if (abilNumber == cardAbilIndex)
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return VALID;
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// Can still match if the ability was changed via ability capsule...
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// However, it can't change to/from Hidden Abilities.
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if (abilNumber == 4 || cardType == 2)
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return GetInvalid(LAbilityHiddenFail);
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// Ability can be flipped 0/1 if Ability Capsule is available, is not Hidden Ability, and Abilities are different.
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if (pkm.Format >= 6 && abilities[0] != abilities[1])
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return GetValid(LAbilityCapsuleUsed);
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return GetInvalid(pkm.Format < 6 ? LAbilityMismatchPID : LAbilityMismatchFlag);
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}
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private CheckResult VerifyAbilityPCD(LegalityAnalysis data, IReadOnlyList<int> abilities, PCD pcd)
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{
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var pkm = data.pkm;
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var format = pkm.Format;
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if (format >= 6)
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{
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if (CanAbilityCapsule(format, abilities))
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{
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// Gen3-5 transfer with same ability -> 1st ability that matches
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if (pkm.AbilityNumber == 1)
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return GetValid(LAbilityFlag);
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return CheckMatch(pkm, abilities, 4, AbilityState.MustMatch); // evolved, must match
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}
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if (pkm.AbilityNumber < 4) // Ability Capsule can change between 1/2
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return GetValid(LAbilityCapsuleUsed);
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}
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if (pcd.Species != pkm.Species)
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return CheckMatch(pkm, abilities, 4, AbilityState.MustMatch); // evolved, must match
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// Edge case (PID ability gift mismatch) -- must match gift ability.
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return pkm.Ability == pcd.Gift.PK.Ability ? VALID : INVALID;
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}
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private CheckResult VerifyAbility5(LegalityAnalysis data, IEncounterable enc, IReadOnlyList<int> abilities)
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{
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var pkm = data.pkm;
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switch (enc)
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{
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case EncounterSlot w:
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// Hidden Abilities for Wild Encounters are only available at a Hidden Grotto
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bool grotto = w.Area.Type == SlotType.HiddenGrotto;
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if (pkm.AbilityNumber == 4 ^ grotto)
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return GetInvalid(grotto ? LAbilityMismatchGrotto : LAbilityHiddenFail);
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break;
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case EncounterEgg e when pkm.AbilityNumber == 4:
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// Hidden Abilities for some are unbreedable or unreleased
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if (Legal.Ban_BreedHidden5.Contains(e.Species))
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return GetInvalid(LAbilityHiddenUnavailable);
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break;
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}
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var state = pkm.Format == 5 ? AbilityState.MustMatch : AbilityState.CanMismatch;
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return CheckMatch(data.pkm, abilities, 5, state);
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}
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private CheckResult VerifyAbility6(LegalityAnalysis data, IEncounterable enc)
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{
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var pkm = data.pkm;
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if (pkm.AbilityNumber != 4)
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return VALID;
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// hidden abilities
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if (enc is EncounterSlot slot)
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{
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bool valid = slot is EncounterSlot6AO {CanDexNav: true} || slot.Area.Type is SlotType.FriendSafari or SlotType.Horde;
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if (!valid)
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return GetInvalid(LAbilityMismatchHordeSafari);
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}
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if (Legal.Ban_NoHidden6.Contains(pkm.SpecForm))
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return GetInvalid(LAbilityHiddenUnavailable);
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return VALID;
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}
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private CheckResult VerifyAbility7(LegalityAnalysis data, IEncounterable enc)
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{
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var pkm = data.pkm;
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if (enc is EncounterSlot slot && pkm.AbilityNumber == 4)
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{
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bool valid = slot.Area.Type == SlotType.SOS;
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if (!valid)
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return GetInvalid(LAbilityMismatchSOS);
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}
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if (Legal.Ban_NoHidden7.Contains(pkm.SpecForm) && pkm.AbilityNumber == 4)
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return GetInvalid(LAbilityHiddenUnavailable);
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return VALID;
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}
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private CheckResult VerifyAbility8(LegalityAnalysis data, IEncounterable enc)
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{
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var pkm = data.pkm;
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if (enc is EncounterSlot && pkm.AbilityNumber == 4)
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return GetInvalid(LAbilityHiddenUnavailable);
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if (Legal.Ban_NoHidden8.Contains(pkm.SpecForm) && pkm.AbilityNumber == 4)
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return GetInvalid(LAbilityHiddenUnavailable);
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return VALID;
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}
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/// <summary>
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/// Final checks assuming nothing else has flagged the ability.
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/// </summary>
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/// <param name="pkm">Pokémon</param>
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/// <param name="abilities">Current abilities</param>
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/// <param name="gen">Generation</param>
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/// <param name="state">Permissive to allow ability to deviate under special circumstances</param>
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private CheckResult CheckMatch(PKM pkm, IReadOnlyList<int> abilities, int gen, AbilityState state)
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{
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if (3 <= gen && gen <= 4 && pkm.AbilityNumber == 4)
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return GetInvalid(LAbilityHiddenUnavailable);
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// other cases of hidden ability already flagged, all that is left is 1/2 mismatching
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if (state != AbilityState.MustMatch)
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return VALID;
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// Check that the ability bit is correct.
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if (pkm is G3PKM g3)
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{
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var abit = g3.AbilityBit;
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if (abilities[0] == abilities[1]) // Not a dual ability
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{
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// Must not have the Ability bit flag set.
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// Some shadow stuff with single-ability might have the flag set anyways?
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if (abit && !(pkm is IShadowPKM {ShadowID: not 0}))
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return GetInvalid(LAbilityMismatchFlag, CheckIdentifier.PID);
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}
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else
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{
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// Gen3 mainline origin sets the Ability index based on the PID, but only if it has two abilities.
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// Version value check isn't factually correct, but there are no C/XD gifts with (Version!=15) that have two abilities.
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// Pikachu, Celebi, Ho-Oh
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if (pkm.Version != (int)GameVersion.CXD && abit != ((pkm.PID & 1) == 1))
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return GetInvalid(LAbilityMismatchPID, CheckIdentifier.PID);
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}
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}
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else if (pkm.Format >= 6)
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{
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// 6+ already checked at the top of the verifier call stack
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return VALID;
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}
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// 3-5
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var abil = abilities[pkm.AbilityNumber >> 1];
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if (abil != pkm.Ability)
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return GetInvalid(LAbilityMismatchPID);
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return VALID;
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}
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// Ability Capsule can change between 1/2
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private static bool IsAbilityCapsuleModified(PKM pkm, IReadOnlyList<int> abilities, int EncounterAbility)
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{
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if (!CanAbilityCapsule(pkm.Format, abilities))
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return false;
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if (pkm.AbilityNumber == 4)
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return false; // Cannot alter to hidden ability.
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if (EncounterAbility == 4)
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return false; // Cannot alter from hidden ability.
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return true;
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}
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private static bool CanAbilityCapsule(int format, IReadOnlyList<int> abilities)
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{
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if (format < 6) // Ability Capsule does not exist
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return false;
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return abilities[0] != abilities[1]; // Cannot alter ability index if it is the same as the other ability.
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}
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public static bool CanAbilityPatch(int format, IReadOnlyList<int> abilities, int species)
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{
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if (format < 8) // Ability Patch does not exist
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return false;
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// Can alter ability index if it is different from the other abilities.
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var h = abilities[2];
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if (h != abilities[0] || h != abilities[1])
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return true;
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// Some species have a distinct hidden ability only on another form, and can change between that form and its current form.
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return species switch
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{
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(int)Species.Giratina => true, // Form-0 is a/a/h
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(int)Species.Tornadus => true, // Form-0 is a/a/h
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(int)Species.Thundurus => true, // Form-0 is a/a/h
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(int)Species.Landorus => true, // Form-0 is a/a/h
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_ => false
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};
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}
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private static int GetEncounterFixedAbilityNumber(IEncounterable enc)
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{
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return enc switch
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{
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EncounterStatic s => s.Ability,
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EncounterTrade t => t.Ability,
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_ => -1
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};
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}
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}
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}
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