using System;
using static PKHeX.Core.Legal;
namespace PKHeX.Core;
///
/// Logic to create an .
///
internal static class EvolutionChain
{
public static EvolutionHistory GetEvolutionChainsAllGens(PKM pk, IEncounterTemplate enc)
{
var origin = new EvolutionOrigin((ushort)enc.Species, (byte)enc.Version, (byte)enc.Generation, enc.LevelMin, (byte)pk.CurrentLevel);
if (!pk.IsEgg && enc is not EncounterInvalid)
return GetEvolutionChainsSearch(pk, origin);
var history = new EvolutionHistory();
var group = EvolutionGroupUtil.GetCurrentGroup(pk);
var chain = group.GetInitialChain(pk, origin, (ushort)pk.Species, (byte)pk.Form);
history.Set(pk.Context, chain);
return history;
}
public static EvolutionHistory GetEvolutionChainsSearch(PKM pk, EvolutionOrigin enc)
{
var group = EvolutionGroupUtil.GetCurrentGroup(pk);
ReadOnlySpan chain = group.GetInitialChain(pk, enc, (ushort)pk.Species, (byte)pk.Form);
var history = new EvolutionHistory();
while (true)
{
var any = group.Append(pk, history, ref chain, enc);
if (!any)
break;
var previous = group.GetPrevious(pk, enc);
if (previous is null)
break;
group = previous;
}
return history;
}
public static EvoCriteria[] GetValidPreEvolutions(PKM pk, int maxspeciesorigin = -1, int maxLevel = -1, int minLevel = 1, bool skipChecks = false)
{
if (maxLevel < 0)
maxLevel = pk.CurrentLevel;
if (maxspeciesorigin == -1 && ParseSettings.AllowGen1Tradeback && pk.Format <= 2 && pk.Generation == 1)
maxspeciesorigin = MaxSpeciesID_2;
var context = pk.Context;
if (context < EntityContext.Gen2)
context = EntityContext.Gen2;
var et = EvolutionTree.GetEvolutionTree(context);
return et.GetValidPreEvolutions(pk, levelMax: (byte)maxLevel, maxSpeciesOrigin: maxspeciesorigin, skipChecks: skipChecks, levelMin: (byte)minLevel);
}
}