PKHeX/PKHeX.Core/Legality/Learnset/Learnset.cs

294 lines
11 KiB
C#

using System;
using System.Collections.Generic;
namespace PKHeX.Core
{
/// <summary>
/// Level Up Learn Movepool Information
/// </summary>
public sealed class Learnset
{
/// <summary>
/// Moves that can be learned.
/// </summary>
private readonly int[] Moves;
/// <summary>
/// Levels at which a move at a given index can be learned.
/// </summary>
private readonly int[] Levels;
public Learnset(int[] moves, int[] levels)
{
Moves = moves;
Levels = levels;
}
/// <summary>
/// Returns the moves a Pokémon can learn between the specified level range.
/// </summary>
/// <param name="maxLevel">Maximum level</param>
/// <param name="minLevel">Minimum level</param>
/// <returns>Array of Move IDs</returns>
public int[] GetMoves(int maxLevel, int minLevel = 0)
{
if (minLevel <= 1 && maxLevel >= 100)
return Moves;
if (minLevel > maxLevel)
return Array.Empty<int>();
int start = Array.FindIndex(Levels, z => z >= minLevel);
if (start < 0)
return Array.Empty<int>();
int end = Array.FindLastIndex(Levels, z => z <= maxLevel);
if (end < 0)
return Array.Empty<int>();
int[] result = new int[end - start + 1];
Array.Copy(Moves, start, result, 0, result.Length);
return result;
}
/// <summary>
/// Adds the moves a Pokémon can learn between the specified level range.
/// </summary>
/// <param name="moves">Movepool</param>
/// <param name="maxLevel">Maximum level</param>
/// <param name="minLevel">Minimum level</param>
/// <returns>Array of Move IDs</returns>
public List<int> AddMoves(List<int> moves, int maxLevel, int minLevel = 0)
{
if (minLevel <= 1 && maxLevel >= 100)
{
moves.AddRange(Moves);
return moves;
}
if (minLevel > maxLevel)
return moves;
int start = Array.FindIndex(Levels, z => z >= minLevel);
if (start < 0)
return moves;
int end = Array.FindLastIndex(Levels, z => z <= maxLevel);
if (end < 0)
return moves;
for (int i = start; i < end + 1; i++)
moves.Add(Moves[i]);
return moves;
}
/// <summary>
/// Gets the moves a Pokémon can learn between the specified level range as a list.
/// </summary>
/// <param name="maxLevel">Maximum level</param>
/// <param name="minLevel">Minimum level</param>
/// <returns>Array of Move IDs</returns>
public List<int> GetMoveList(int maxLevel, int minLevel = 0)
{
var list = new List<int>();
return AddMoves(list, maxLevel, minLevel);
}
/// <summary>Returns the moves a Pokémon would have if it were encountered at the specified level.</summary>
/// <remarks>In Generation 1, it is not possible to learn any moves lower than these encounter moves.</remarks>
/// <param name="level">The level the Pokémon was encountered at.</param>
/// <returns>Array of Move IDs</returns>
public int[] GetEncounterMoves(int level)
{
const int count = 4;
var moves = new int[count];
SetEncounterMoves(level, moves);
return moves;
}
/// <summary>Returns the moves a Pokémon would have if it were encountered at the specified level.</summary>
/// <remarks>In Generation 1, it is not possible to learn any moves lower than these encounter moves.</remarks>
/// <param name="level">The level the Pokémon was encountered at.</param>
/// <param name="moves">Move array to write to</param>
/// <param name="ctr">Starting index to begin overwriting at</param>
/// <returns>Array of Move IDs</returns>
public void SetEncounterMoves(int level, Span<int> moves, int ctr = 0)
{
for (int i = 0; i < Moves.Length; i++)
{
if (Levels[i] > level)
break;
int move = Moves[i];
bool alreadyHasMove = moves.IndexOf(move) >= 0;
if (alreadyHasMove)
continue;
moves[ctr++] = move;
ctr &= 3;
}
}
/// <summary>Adds the learned moves by level up to the specified level.</summary>
public void SetLevelUpMoves(int startLevel, int endLevel, Span<int> moves, int ctr = 0)
{
int startIndex = Array.FindIndex(Levels, z => z >= startLevel);
int endIndex = Array.FindIndex(Levels, z => z > endLevel);
for (int i = startIndex; i < endIndex; i++)
{
int move = Moves[i];
bool alreadyHasMove = moves.IndexOf(move) >= 0;
if (alreadyHasMove)
continue;
moves[ctr++] = move;
ctr &= 3;
}
}
/// <summary>Adds the moves that are gained upon evolving.</summary>
/// <param name="moves">Move array to write to</param>
/// <param name="ctr">Starting index to begin overwriting at</param>
public void SetEvolutionMoves(Span<int> moves, int ctr = 0)
{
for (int i = 0; i < Moves.Length; i++)
{
if (Levels[i] != 0)
break;
int move = Moves[i];
bool alreadyHasMove = moves.IndexOf(move) >= 0;
if (alreadyHasMove)
continue;
moves[ctr++] = move;
ctr &= 3;
}
}
/// <summary>Adds the learned moves by level up to the specified level.</summary>
public void SetLevelUpMoves(int startLevel, int endLevel, Span<int> moves, ReadOnlySpan<int> ignore, int ctr = 0)
{
int startIndex = Array.FindIndex(Levels, z => z >= startLevel);
int endIndex = Array.FindIndex(Levels, z => z > endLevel);
for (int i = startIndex; i < endIndex; i++)
{
int move = Moves[i];
if (ignore.IndexOf(move) >= 0)
continue;
bool alreadyHasMove = moves.IndexOf(move) >= 0;
if (alreadyHasMove)
continue;
moves[ctr++] = move;
ctr &= 3;
}
}
/// <summary>Adds the moves that are gained upon evolving.</summary>
/// <param name="moves">Move array to write to</param>
/// <param name="ignore">Ignored moves</param>
/// <param name="ctr">Starting index to begin overwriting at</param>
public void SetEvolutionMoves(Span<int> moves, ReadOnlySpan<int> ignore, int ctr = 0)
{
for (int i = 0; i < Moves.Length; i++)
{
if (Levels[i] != 0)
break;
int move = Moves[i];
if (ignore.IndexOf(move) >= 0)
continue;
bool alreadyHasMove = moves.IndexOf(move) >= 0;
if (alreadyHasMove)
continue;
moves[ctr++] = move;
ctr &= 3;
}
}
public IList<int> GetUniqueMovesLearned(IEnumerable<int> seed, int maxLevel, int minLevel = 0)
{
int start = Array.FindIndex(Levels, z => z >= minLevel);
int end = Array.FindLastIndex(Levels, z => z <= maxLevel);
var list = new List<int>(seed);
for (int i = start; i <= end; i++)
{
if (!list.Contains(Moves[i]))
list.Add(Moves[i]);
}
return list;
}
/// <summary>Returns the index of the lowest level move if the Pokémon were encountered at the specified level.</summary>
/// <remarks>Helps determine the minimum level an encounter can be at.</remarks>
/// <param name="level">The level the Pokémon was encountered at.</param>
/// <returns>Array of Move IDs</returns>
public int GetMinMoveLevel(int level)
{
if (Levels.Length == 0)
return 1;
int end = Array.FindLastIndex(Levels, z => z <= level);
return Math.Max(end - 4, 1);
}
private Dictionary<int, int>? Learn;
private Dictionary<int, int> GetDictionary()
{
var dict = new Dictionary<int, int>();
for (int i = 0; i < Moves.Length; i++)
{
if (!dict.ContainsKey(Moves[i]))
dict.Add(Moves[i], Levels[i]);
}
return dict;
}
/// <summary>Returns the level that a Pokémon can learn the specified move.</summary>
/// <param name="move">Move ID</param>
/// <returns>Level the move is learned at. If the result is below 0, the move cannot be learned by leveling up.</returns>
public int GetLevelLearnMove(int move)
{
return (Learn ??= GetDictionary()).TryGetValue(move, out var level) ? level : -1;
}
/// <summary>Returns the level that a Pokémon can learn the specified move.</summary>
/// <param name="move">Move ID</param>
/// <param name="min">Minimum level to start looking at.</param>
/// <returns>Level the move is learned at. If the result is below 0, the move cannot be learned by leveling up.</returns>
public int GetLevelLearnMove(int move, int min)
{
for (int i = 0; i < Moves.Length; i++)
{
if (move != Moves[i])
continue;
var lv = Levels[i];
if (lv >= min)
return lv;
}
return -1;
}
public ReadOnlySpan<int> GetBaseEggMoves(int level)
{
// Count moves <= level
var count = 0;
foreach (var x in Levels)
{
if (x > level)
break;
count++;
}
// Return a slice containing the moves <= level.
if (count == 0)
return ReadOnlySpan<int>.Empty;
int start = 0;
if (count > 4)
{
start = count - 4;
count = 4;
}
return Moves.AsSpan(start, count);
}
}
}