using System;
using System.Diagnostics.CodeAnalysis;
using static PKHeX.Core.LearnMethod;
using static PKHeX.Core.LearnEnvironment;
using static PKHeX.Core.LearnSource4;
namespace PKHeX.Core;
///
/// Exposes information about how moves are learned in .
///
public sealed class LearnSource4DP : ILearnSource, IEggSource
{
public static readonly LearnSource4DP Instance = new();
private static readonly PersonalTable4 Personal = PersonalTable.DP;
private static readonly Learnset[] Learnsets = Legal.LevelUpDP;
private static readonly EggMoves6[] EggMoves = Legal.EggMovesDPPt;
private const int MaxSpecies = Legal.MaxSpeciesID_4;
private const LearnEnvironment Game = DP;
private const int Generation = 4;
private const int CountTM = 92;
public Learnset GetLearnset(ushort species, int form) => Learnsets[Personal.GetFormIndex(species, form)];
public bool TryGetPersonal(ushort species, int form, [NotNullWhen(true)] out PersonalInfo? pi)
{
pi = null;
if ((uint)species > MaxSpecies)
return false;
pi = Personal[species];
return true;
}
public bool GetIsEggMove(ushort species, int form, ushort move)
{
if ((uint)species > MaxSpecies)
return false;
var moves = EggMoves[species];
return moves.GetHasEggMove(move);
}
public ReadOnlySpan GetEggMoves(ushort species, int form)
{
if ((uint)species > MaxSpecies)
return ReadOnlySpan.Empty;
return EggMoves[species].Moves;
}
public MoveLearnInfo GetCanLearn(PKM pk, PersonalInfo pi, EvoCriteria evo, ushort move, MoveSourceType types = MoveSourceType.All, LearnOption option = LearnOption.Current)
{
if (types.HasFlagFast(MoveSourceType.LevelUp))
{
var learn = GetLearnset(evo.Species, evo.Form);
var level = learn.GetLevelLearnMove(move);
if (level != -1 && level <= evo.LevelMax)
return new(LevelUp, Game, (byte)level);
}
if (types.HasFlagFast(MoveSourceType.Machine))
{
if (GetIsTM(pi, move))
return new(TMHM, Game);
if ((move is (int)Move.Defog || pk.Format == Generation) && GetIsHM(pi, move))
return new(TMHM, Game);
}
if (types.HasFlagFast(MoveSourceType.TypeTutor) && GetIsTypeTutor(evo.Species, move))
return new(Tutor, Game);
if (types.HasFlagFast(MoveSourceType.SpecialTutor) && GetIsSpecialTutor(pi, move))
return new(Tutor, Game);
return default;
}
private static bool GetIsTypeTutor(ushort species, ushort move)
{
var index = Array.IndexOf(SpecialTutors_4, move);
if (index == -1)
return false;
var list = SpecialTutors_Compatibility_4[index].AsSpan();
return list.IndexOf(species) != -1;
}
private static bool GetIsSpecialTutor(PersonalInfo pi, ushort move)
{
var index = Array.IndexOf(Tutors_4, move);
if (index == -1)
return false;
return pi.TypeTutors[index];
}
private static bool GetIsTM(PersonalInfo info, ushort move)
{
var index = Array.IndexOf(TM_4, move);
if (index == -1)
return false;
return info.TMHM[index];
}
private static bool GetIsHM(PersonalInfo info, ushort move)
{
var index = Array.IndexOf(HM_DPPt, move);
if (index == -1)
return false;
return info.TMHM[CountTM + index];
}
public void GetAllMoves(Span result, PKM pk, EvoCriteria evo, MoveSourceType types = MoveSourceType.All)
{
if (!TryGetPersonal(evo.Species, evo.Form, out var pi))
return;
if (types.HasFlagFast(MoveSourceType.LevelUp))
{
var learn = GetLearnset(evo.Species, evo.Form);
(bool hasMoves, int start, int end) = learn.GetMoveRange(evo.LevelMax);
if (hasMoves)
{
var moves = learn.Moves;
for (int i = end; i >= start; i--)
result[moves[i]] = true;
}
}
if (types.HasFlagFast(MoveSourceType.Machine))
{
var flags = pi.TMHM;
var moves = TM_4;
for (int i = 0; i < moves.Length; i++)
{
if (flags[i])
result[moves[i]] = true;
}
if (pk.Format == Generation)
{
moves = HM_DPPt;
for (int i = 0; i < moves.Length; i++)
{
if (flags[CountTM + i])
result[moves[i]] = true;
}
}
else
{
// Permit Defog to leak through if transferred to Gen5+ (via HG/SS)
if (flags[CountTM + 4])
result[(int)Move.Defog] = true;
}
}
if (types.HasFlagFast(MoveSourceType.SpecialTutor))
{
var flags = pi.TypeTutors;
var moves = Tutors_4;
for (int i = 0; i < moves.Length; i++)
{
if (flags[i])
result[moves[i]] = true;
}
}
}
}