PKHeX/PKHeX.Core/Legality/Verifiers/FormVerifier.cs
2020-12-29 00:58:08 -08:00

344 lines
15 KiB
C#

using System;
using System.Collections.Generic;
using static PKHeX.Core.LegalityCheckStrings;
namespace PKHeX.Core
{
/// <summary>
/// Verifies the <see cref="PKM.Form"/> value.
/// </summary>
public sealed class FormVerifier : Verifier
{
protected override CheckIdentifier Identifier => CheckIdentifier.Form;
public override void Verify(LegalityAnalysis data)
{
var pkm = data.pkm;
if (pkm.Format < 4)
return; // no forms exist
var result = VerifyForm(data);
data.AddLine(result);
if (pkm is IFormArgument f)
data.AddLine(VerifyFormArgument(data, f.FormArgument));
}
private CheckResult VALID => GetValid(LFormValid);
private CheckResult VerifyForm(LegalityAnalysis data)
{
var pkm = data.pkm;
var PersonalInfo = data.PersonalInfo;
int count = PersonalInfo.FormCount;
var form = pkm.Form;
if (count <= 1 && form == 0)
return VALID; // no forms to check
var species = pkm.Species;
var EncounterMatch = data.EncounterMatch;
var Info = data.Info;
if (!PersonalInfo.IsFormWithinRange(form) && !FormInfo.IsValidOutOfBoundsForm(species, form, Info.Generation))
return GetInvalid(string.Format(LFormInvalidRange, count - 1, form));
if (EncounterMatch is EncounterSlot w && w.Area.Type == SlotType.FriendSafari)
{
VerifyFormFriendSafari(data);
}
else if (EncounterMatch is EncounterEgg)
{
if (FormInfo.IsTotemForm(species, form, data.Info.Generation))
return GetInvalid(LFormInvalidGame);
}
switch (species)
{
case (int)Species.Pikachu when Info.Generation == 6: // Cosplay
bool isStatic = EncounterMatch is EncounterStatic;
if (isStatic != (form != 0))
return GetInvalid(isStatic ? LFormPikachuCosplayInvalid : LFormPikachuCosplay);
break;
case (int)Species.Pikachu when Info.Generation >= 7: // Cap
bool IsValidPikachuCap()
{
return EncounterMatch switch
{
WC7 wc7 => (wc7.Form == form),
WC8 wc => (wc.Form == form),
EncounterStatic s => (s.Form == form),
_ => (form == 0)
};
}
if (!IsValidPikachuCap())
{
bool gift = EncounterMatch is MysteryGift g && g.Form != form;
var msg = gift ? LFormPikachuEventInvalid : LFormInvalidGame;
return GetInvalid(msg);
}
break;
case (int)Species.Unown when Info.Generation == 2 && form >= 26:
return GetInvalid(string.Format(LFormInvalidRange, "Z", form == 26 ? "!" : "?"));
case (int)Species.Giratina when form == 1 ^ pkm.HeldItem == 112: // Giratina, Origin form only with Griseous Orb
return GetInvalid(LFormItemInvalid);
case (int)Species.Arceus:
{
int arceus = GetArceusFormFromHeldItem(pkm.HeldItem, pkm.Format);
return arceus != form ? GetInvalid(LFormItemInvalid) : GetValid(LFormItem);
}
case (int)Species.Keldeo:
{
// can mismatch in gen5 via BW tutor and transfer up
// can mismatch in gen8+ as the form activates in battle when knowing the move; outside of battle can be either state.
if (Info.Generation == 5 || pkm.Format >= 8)
break;
int index = Array.IndexOf(pkm.Moves, 548); // Secret Sword
bool noSword = index < 0;
if (form == 0 ^ noSword) // mismatch
Info.Moves[noSword ? 0 : index] = new CheckMoveResult(Info.Moves[noSword ? 0 : index], Severity.Invalid, LMoveKeldeoMismatch, CheckIdentifier.Move);
break;
}
case (int)Species.Genesect:
{
int genesect = GetGenesectFormFromHeldItem(pkm.HeldItem);
return genesect != form ? GetInvalid(LFormItemInvalid) : GetValid(LFormItem);
}
case (int)Species.Greninja:
if (form > 1) // Ash Battle Bond active
return GetInvalid(LFormBattle);
if (form != 0 && EncounterMatch is not MysteryGift) // Formes are not breedable, MysteryGift already checked
return GetInvalid(string.Format(LFormInvalidRange, 0, form));
break;
case (int)Species.Scatterbug or (int)Species.Spewpa:
if (form > 17) // Fancy & Pokéball
return GetInvalid(LFormVivillonEventPre);
if (pkm is not IRegionOrigin tr)
break;
if (!Vivillon3DS.IsPatternValid(form, (byte)tr.Country, (byte)tr.Region))
data.AddLine(Get(LFormVivillonInvalid, Severity.Fishy));
break;
case (int)Species.Vivillon:
if (form > 17) // Fancy & Pokéball
{
if (EncounterMatch is not MysteryGift)
return GetInvalid(LFormVivillonInvalid);
return GetValid(LFormVivillon);
}
if (pkm is not IGeoTrack trv)
break;
if (!Vivillon3DS.IsPatternValid(form, (byte)trv.Country, (byte)trv.Region))
data.AddLine(Get(LFormVivillonInvalid, Severity.Fishy));
break;
case (int)Species.Floette when form == 5: // Floette Eternal Flower -- Never Released
if (EncounterMatch is not MysteryGift)
return GetInvalid(LFormEternalInvalid);
return GetValid(LFormEternal);
case (int)Species.Meowstic when form != pkm.Gender:
return GetInvalid(LGenderInvalidNone);
case (int)Species.Silvally:
{
int silvally = GetSilvallyFormFromHeldItem(pkm.HeldItem);
return silvally != form ? GetInvalid(LFormItemInvalid) : GetValid(LFormItem);
}
case (int)Species.Lillipup when Info.EncounterMatch.EggEncounter && form == 1 && pkm.SM:
case (int)Species.Lycanroc when Info.EncounterMatch.EggEncounter && form == 2 && pkm.SM:
return GetInvalid(LFormInvalidGame);
// Toxel encounters have already been checked for the nature-specific evolution criteria.
case (int)Species.Toxtricity when Info.EncounterMatch.Species == (int)Species.Toxtricity:
{
// The game enforces the Nature for Toxtricity encounters too!
if (pkm.Form != EvolutionMethod.GetAmpLowKeyResult(pkm.Nature))
return GetInvalid(LFormInvalidNature);
break;
}
// Impossible Egg forms
case (int)Species.Rotom when pkm.IsEgg && form != 0:
case (int)Species.Furfrou when pkm.IsEgg && form != 0:
return GetInvalid(LEggSpecies);
// Party Only Forms
case (int)Species.Shaymin:
case (int)Species.Furfrou:
case (int)Species.Hoopa:
if (form != 0 && pkm.Box > -1 && pkm.Format <= 6) // has form but stored in box
return GetInvalid(LFormParty);
break;
}
var format = pkm.Format;
if (FormInfo.IsBattleOnlyForm(species, form, format))
return GetInvalid(LFormBattle);
if (form == 0)
return VALID;
// everything below here is not Form 0, so it has a form.
if (format >= 7 && Info.Generation < 7)
{
if (species == 25 || Legal.AlolanOriginForms.Contains(species) || Legal.AlolanVariantEvolutions12.Contains(data.EncounterOriginal.Species))
return GetInvalid(LFormInvalidGame);
}
if (format >= 8 && Info.Generation < 8)
{
var orig = data.EncounterOriginal.Species;
if (Legal.GalarOriginForms.Contains(species) || Legal.GalarVariantFormEvolutions.Contains(orig))
{
if (species == (int)Species.Meowth && data.EncounterOriginal.Form != 2)
{
// We're okay here. There's also Alolan Meowth...
}
else if ((orig is (int) Species.MrMime or (int)Species.MimeJr) && pkm.CurrentLevel > data.EncounterOriginal.LevelMin && Info.Generation >= 4)
{
// We're okay with a Mime Jr. that has evolved via level up.
}
else if (EncounterMatch.Version != GameVersion.GO)
{
return GetInvalid(LFormInvalidGame);
}
}
}
return VALID;
}
private static readonly ushort[] Arceus_PlateIDs = { 303, 306, 304, 305, 309, 308, 310, 313, 298, 299, 301, 300, 307, 302, 311, 312, 644 };
private static readonly ushort[] Arceus_ZCrystal = { 782, 785, 783, 784, 788, 787, 789, 792, 777, 778, 780, 779, 786, 781, 790, 791, 793 };
public static int GetArceusFormFromHeldItem(int item, int format)
{
if (item is >= 777 and <= 793)
return Array.IndexOf(Arceus_ZCrystal, (ushort)item) + 1;
int form = 0;
if (item is >= 298 and <= 313 or 644)
form = Array.IndexOf(Arceus_PlateIDs, (ushort)item) + 1;
if (format == 4 && form >= 9)
return form + 1; // ??? type Form shifts everything by 1
return form;
}
public static int GetSilvallyFormFromHeldItem(int item)
{
if (904 <= item && item <= 920)
return item - 903;
return 0;
}
public static int GetGenesectFormFromHeldItem(int item)
{
if (116 <= item && item <= 119)
return item - 115;
return 0;
}
private static readonly HashSet<int> SafariFloette = new() { 0, 1, 3 }; // 0/1/3 - RBY
private void VerifyFormFriendSafari(LegalityAnalysis data)
{
var pkm = data.pkm;
switch (pkm.Species)
{
case (int)Species.Floette or (int)Species.Florges when!SafariFloette.Contains(pkm.Form): // Floette
data.AddLine(GetInvalid(LFormSafariFlorgesColor));
break;
case 710 when pkm.Form != 0: // Pumpkaboo
case (int)Species.Gourgeist when pkm.Form != 0: // Average
data.AddLine(GetInvalid(LFormSafariPumpkabooAverage));
break;
case (int)Species.Gastrodon when pkm.Form != 0: // West
data.AddLine(GetInvalid(LFormSafariFlorgesColor));
break;
case (int)Species.Sawsbuck when pkm.Form != 0: // Sawsbuck
data.AddLine(GetInvalid(LFormSafariSawsbuckSpring));
break;
}
}
private CheckResult VerifyFormArgument(LegalityAnalysis data, in uint arg)
{
var pkm = data.pkm;
switch (data.pkm.Species)
{
default:
{
if (arg != 0)
return GetInvalid(LFormArgumentNotAllowed);
break;
}
case (int)Species.Furfrou:
{
if (arg > 5)
return GetInvalid(LFormArgumentHigh);
if (arg == 0 && pkm.Form != 0)
return GetInvalid(LFormArgumentNotAllowed);
if (arg != 0 && pkm.Form == 0)
return GetInvalid(LFormArgumentNotAllowed);
break;
}
case (int)Species.Hoopa:
{
if (arg > 3)
return GetInvalid(LFormArgumentHigh);
if (arg == 0 && pkm.Form != 0)
return GetInvalid(LFormArgumentNotAllowed);
if (arg != 0 && pkm.Form == 0)
return GetInvalid(LFormArgumentNotAllowed);
break;
}
case (int)Species.Yamask when pkm.Form == 1:
{
if (pkm.IsEgg)
{
if (arg != 0)
return GetInvalid(LFormArgumentNotAllowed);
}
if (arg > 9_999)
return GetInvalid(LFormArgumentHigh);
break;
}
case (int)Species.Runerigus:
{
if (data.EncounterMatch.Species == (int)Species.Runerigus)
{
if (arg != 0)
return GetInvalid(LFormArgumentNotAllowed);
}
else
{
if (arg < 49)
return GetInvalid(LFormArgumentLow);
if (arg > 9_999)
return GetInvalid(LFormArgumentHigh);
}
break;
}
case (int)Species.Alcremie:
{
if (data.EncounterMatch.Species == (int)Species.Alcremie)
{
if (arg != 0)
return GetInvalid(LFormArgumentNotAllowed);
}
else
{
if (arg > (uint)AlcremieDecoration.Ribbon)
return GetInvalid(LFormArgumentHigh);
}
break;
}
}
return GetValid(LFormArgumentValid);
}
}
}