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PKHeX/PKHeX.Core/Legality/Encounters/VerifyEncounter.cs

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Refactor encounter matching exercise in deferred execution/state machine, only calculate possible matches until a sufficiently valid match is obtained. Previous setup would try to calculate the 'best match' and had band-aid workarounds in cases where a subsequent check may determine it to be a false match. There's still more ways to improve speed: - precalculate relationships for Encounter Slots rather than iterating over every area - yielding individual slots instead of an entire area - group non-egg wondercards by ID in a dict/hashtable for faster retrieval reworked some internals: - EncounterMatch is always an IEncounterable instead of an object, for easy pattern matching. - Splitbreed checking is done per encounter and is stored in the EncounterEgg result - Encounter validation uses Encounter/Move/RelearnMove/Evolution to whittle to the final encounter. As a part of the encounter matching, a lazy peek is used to check if an invalid encounter should be retained instead of discarded; if another encounter has not been checked, it'll stop the invalid checks and move on. If it is the last encounter, no other valid encounters exist so it will keep the parse for the invalid encounter. If no encounters are yielded, then there is no encountermatch. An EncounterInvalid is created to store basic details, and the parse is carried out. Breaks some legality checking features for flagging invalid moves in more detail, but those can be re-added in a separate check (if splitbreed & any move invalid -> check for other split moves). Should now be easier to follow the flow & maintain :smile:
2017-05-28 04:17:53 +00:00
using System.Linq;
using static PKHeX.Core.LegalityCheckStrings;
namespace PKHeX.Core
{
public static class VerifyEncounter
{
public static CheckResult verifyEncounter(PKM pkm, IEncounterable encounter)
{
if (encounter is EncounterEgg e)
{
pkm.WasEgg = true;
if (pkm.GenNumber == 3)
return verifyEncounterEgg3Transfer(pkm);
return verifyEncounterEgg(pkm, e);
}
if (encounter is EncounterLink l)
return verifyEncounterLink(pkm, l);
if (encounter is EncounterTrade t)
return verifyEncounterTrade(pkm, t);
if (encounter is EncounterSlot w)
return verifyEncounterWild(pkm, w);
if (encounter is EncounterStatic s)
return verifyEncounterStatic(pkm, s, null);
if (encounter is MysteryGift g)
return verifyEncounterEvent(pkm, g);
return new CheckResult(Severity.Invalid, V80, CheckIdentifier.Encounter);
}
public static CheckResult verifyEncounterG12(PKM pkm, IEncounterable encounter)
{
var EncounterMatch = encounter is GBEncounterData g ? g.Encounter : encounter;
if (encounter.EggEncounter)
{
pkm.WasEgg = true;
return verifyEncounterEgg(pkm, EncounterMatch);
}
if (EncounterMatch is EncounterSlot)
return new CheckResult(Severity.Valid, V68, CheckIdentifier.Encounter);
if (EncounterMatch is EncounterStatic s)
return verifyEncounterStatic(pkm, s, null);
if (EncounterMatch is EncounterTrade t)
return verifyEncounterTrade(pkm, t);
return new CheckResult(Severity.Invalid, V80, CheckIdentifier.Encounter);
}
// Eggs
private static CheckResult verifyEncounterEgg(PKM pkm, IEncounterable egg)
{
// Check Species
if (Legal.NoHatchFromEgg.Contains(pkm.Species))
return new CheckResult(Severity.Invalid, V50, CheckIdentifier.Encounter);
switch (pkm.GenNumber)
{
case 1:
case 2: return new CheckResult(CheckIdentifier.Encounter); // no met location info
case 3: return verifyEncounterEgg3(pkm);
case 4: return pkm.IsEgg ? verifyUnhatchedEgg(pkm, 02002) : verifyEncounterEgg4(pkm);
case 5: return pkm.IsEgg ? verifyUnhatchedEgg(pkm, 30002) : verifyEncounterEgg5(pkm);
case 6: return pkm.IsEgg ? verifyUnhatchedEgg(pkm, 30002) : verifyEncounterEgg6(pkm);
case 7: return pkm.IsEgg ? verifyUnhatchedEgg(pkm, 30002) : verifyEncounterEgg7(pkm);
default: // none of the above
return new CheckResult(Severity.Invalid, V51, CheckIdentifier.Encounter);
}
}
private static CheckResult verifyEncounterEgg3(PKM pkm)
{
return pkm.Format == 3 ? verifyEncounterEgg3Native(pkm) : verifyEncounterEgg3Transfer(pkm);
}
private static CheckResult verifyEncounterEgg3Native(PKM pkm)
{
if (pkm.Met_Level != 0)
return new CheckResult(Severity.Invalid, string.Format(V52, 0), CheckIdentifier.Encounter);
if (pkm.IsEgg)
{
var loc = pkm.FRLG ? Legal.ValidEggMet_FRLG : Legal.ValidEggMet_RSE;
if (!loc.Contains(pkm.Met_Location))
return new CheckResult(Severity.Invalid, V55, CheckIdentifier.Encounter);
}
else
{
var locs = pkm.FRLG ? Legal.ValidMet_FRLG : pkm.E ? Legal.ValidMet_E : Legal.ValidMet_RS;
if (locs.Contains(pkm.Met_Location))
return new CheckResult(Severity.Valid, V53, CheckIdentifier.Encounter);
if (Legal.ValidMet_FRLG.Contains(pkm.Met_Location) || Legal.ValidMet_E.Contains(pkm.Met_Location) || Legal.ValidMet_RS.Contains(pkm.Met_Location))
return new CheckResult(Severity.Valid, V56, CheckIdentifier.Encounter);
return new CheckResult(Severity.Invalid, V54, CheckIdentifier.Encounter);
}
return new CheckResult(Severity.Valid, V53, CheckIdentifier.Encounter);
}
private static CheckResult verifyEncounterEgg3Transfer(PKM pkm)
{
if (pkm.IsEgg)
return new CheckResult(Severity.Invalid, V57, CheckIdentifier.Encounter);
if (pkm.Met_Level < 5)
return new CheckResult(Severity.Invalid, V58, CheckIdentifier.Encounter);
if (pkm.Egg_Location != 0)
return new CheckResult(Severity.Invalid, V59, CheckIdentifier.Encounter);
if (pkm.Format == 4 && pkm.Met_Location != 0x37) // Pal Park
return new CheckResult(Severity.Invalid, V60, CheckIdentifier.Encounter);
if (pkm.Format != 4 && pkm.Met_Location != 30001)
return new CheckResult(Severity.Invalid, V61, CheckIdentifier.Encounter);
return new CheckResult(Severity.Valid, V53, CheckIdentifier.Encounter);
}
private static CheckResult verifyEncounterEgg4(PKM pkm)
{
if (pkm.Format == 4)
return verifyEncounterEggLevelLoc(pkm, 0, pkm.HGSS ? Legal.ValidMet_HGSS : pkm.Pt ? Legal.ValidMet_Pt : Legal.ValidMet_DP);
if (pkm.IsEgg)
return new CheckResult(Severity.Invalid, V57, CheckIdentifier.Encounter);
// transferred
if (pkm.Met_Level < 1)
return new CheckResult(Severity.Invalid, V58, CheckIdentifier.Encounter);
if (pkm.Met_Location != 30001)
return new CheckResult(Severity.Invalid, V61, CheckIdentifier.Encounter);
return new CheckResult(Severity.Valid, V53, CheckIdentifier.Encounter);
}
private static CheckResult verifyEncounterEgg5(PKM pkm)
{
return verifyEncounterEggLevelLoc(pkm, 1, pkm.B2W2 ? Legal.ValidMet_B2W2 : Legal.ValidMet_BW);
}
private static CheckResult verifyEncounterEgg6(PKM pkm)
{
if (pkm.AO)
return verifyEncounterEggLevelLoc(pkm, 1, Legal.ValidMet_AO);
if (pkm.Egg_Location == 318)
return new CheckResult(Severity.Invalid, V55, CheckIdentifier.Encounter);
return verifyEncounterEggLevelLoc(pkm, 1, Legal.ValidMet_XY);
}
private static CheckResult verifyEncounterEgg7(PKM pkm)
{
if (pkm.SM)
return verifyEncounterEggLevelLoc(pkm, 1, Legal.ValidMet_SM);
// no other games
return new CheckResult(Severity.Invalid, V51, CheckIdentifier.Encounter);
}
private static CheckResult verifyEncounterEggLevelLoc(PKM pkm, int eggLevel, int[] MetLocations)
{
if (pkm.Met_Level != eggLevel)
return new CheckResult(Severity.Invalid, string.Format(V52, eggLevel), CheckIdentifier.Encounter);
return MetLocations.Contains(pkm.Met_Location)
? new CheckResult(Severity.Valid, V53, CheckIdentifier.Encounter)
: new CheckResult(Severity.Invalid, V54, CheckIdentifier.Encounter);
}
private static CheckResult verifyUnhatchedEgg(PKM pkm, int tradeLoc)
{
if (pkm.Egg_Location == tradeLoc)
return new CheckResult(Severity.Invalid, V62, CheckIdentifier.Encounter);
if (pkm.Met_Location == tradeLoc)
return new CheckResult(Severity.Valid, V56, CheckIdentifier.Encounter);
return pkm.Met_Location == 0
? new CheckResult(Severity.Valid, V63, CheckIdentifier.Encounter)
: new CheckResult(Severity.Invalid, V59, CheckIdentifier.Encounter);
}
// Etc
private static CheckResult verifyEncounterWild(PKM pkm, EncounterSlot slot)
{
// Check for Unreleased Encounters / Collisions
switch (pkm.GenNumber)
{
case 4:
if (pkm.HasOriginalMetLocation && pkm.Met_Location == 193 && slot.Type == SlotType.Surf)
{
// Pokemon surfing in Johto Route 45
return new CheckResult(Severity.Invalid, V384, CheckIdentifier.Encounter);
}
break;
}
if (slot.Normal)
return slot.Pressure
? new CheckResult(Severity.Valid, V67, CheckIdentifier.Encounter)
: new CheckResult(Severity.Valid, V68, CheckIdentifier.Encounter);
// Decreased Level Encounters
if (slot.WhiteFlute)
return slot.Pressure
? new CheckResult(Severity.Valid, V69, CheckIdentifier.Encounter)
: new CheckResult(Severity.Valid, V70, CheckIdentifier.Encounter);
// Increased Level Encounters
if (slot.BlackFlute)
return slot.Pressure
? new CheckResult(Severity.Valid, V71, CheckIdentifier.Encounter)
: new CheckResult(Severity.Valid, V72, CheckIdentifier.Encounter);
if (slot.Pressure)
return new CheckResult(Severity.Valid, V67, CheckIdentifier.Encounter);
return new CheckResult(Severity.Valid, V73, CheckIdentifier.Encounter);
}
private static CheckResult verifyEncounterStatic(PKM pkm, EncounterStatic s, CheckResult[] vRelearn)
{
// Check for Unreleased Encounters / Collisions
switch (pkm.GenNumber)
{
case 3:
if (s is EncounterStaticShadow w && w.EReader && pkm.Language != 1) // Non-JP E-reader Pokemon
return new CheckResult(Severity.Invalid, V406, CheckIdentifier.Encounter);
if (pkm.Species == 151 && s.Location == 201 && pkm.Language != 1) // Non-JP Mew (Old Sea Map)
return new CheckResult(Severity.Invalid, V353, CheckIdentifier.Encounter);
break;
case 4:
if (pkm.Species == 493 && s.Location == 086) // Azure Flute Arceus
return new CheckResult(Severity.Invalid, V352, CheckIdentifier.Encounter);
if (pkm.Species == 491 && s.Location == 079 && !pkm.Pt) // DP Darkrai
return new CheckResult(Severity.Invalid, V383, CheckIdentifier.Encounter);
if (pkm.Species == 492 && s.Location == 063 && !pkm.Pt) // DP Shaymin
return new CheckResult(Severity.Invalid, V354, CheckIdentifier.Encounter);
if (s.Location == 193 && (s as EncounterStaticTyped)?.TypeEncounter == EncounterType.Surfing_Fishing) // Roaming pokemon surfin in Johto Route 45
return new CheckResult(Severity.Invalid, V384, CheckIdentifier.Encounter);
break;
case 7:
if (s.EggLocation == 60002 && vRelearn.All(rl => rl.Valid))
return new CheckResult(Severity.Invalid, V74, CheckIdentifier.RelearnMove); // not gift egg
break;
}
return new CheckResult(Severity.Valid, V75, CheckIdentifier.Encounter);
}
private static CheckResult verifyEncounterTrade(PKM pkm, EncounterTrade trade)
{
if (trade.Species == pkm.Species && trade.EvolveOnTrade)
{
// Pokemon that evolve on trade can not be in the phase evolution after the trade
// If the trade holds an everstone EvolveOnTrade will be false for the encounter
var species = LegalityAnalysis.specieslist;
var unevolved = species[pkm.Species];
var evolved = species[pkm.Species + 1];
return new CheckResult(Severity.Invalid, string.Format(V401, unevolved, evolved), CheckIdentifier.Encounter);
}
return new CheckResult(Severity.Valid, V76, CheckIdentifier.Encounter);
}
private static CheckResult verifyEncounterLink(PKM pkm, EncounterLink enc)
{
// Should NOT be Fateful, and should be in Database
if (enc == null)
return new CheckResult(Severity.Invalid, V43, CheckIdentifier.Encounter);
if (pkm.XY && !enc.XY)
return new CheckResult(Severity.Invalid, V44, CheckIdentifier.Encounter);
if (pkm.AO && !enc.ORAS)
return new CheckResult(Severity.Invalid, V45, CheckIdentifier.Encounter);
if (enc.Shiny != null && (bool)enc.Shiny ^ pkm.IsShiny)
return new CheckResult(Severity.Invalid, V47, CheckIdentifier.Encounter);
return pkm.FatefulEncounter
? new CheckResult(Severity.Invalid, V48, CheckIdentifier.Encounter)
: new CheckResult(Severity.Valid, V49, CheckIdentifier.Encounter);
}
private static CheckResult verifyEncounterEvent(PKM pkm, MysteryGift MatchedGift)
{
// Strict matching already performed by EncounterGenerator. May be worth moving some checks here to better flag invalid gifts.
return new CheckResult(Severity.Valid, string.Format(V21, MatchedGift.CardID.ToString("0000"), MatchedGift.CardTitle), CheckIdentifier.Encounter);
}
}
}
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