| | | 1 | | using BallSort.Engine.Game; |
| | | 2 | | using BallSort.Engine.Models; |
| | | 3 | | |
| | | 4 | | namespace BallSort.Engine.Logic; |
| | | 5 | | |
| | | 6 | | public class MoveGenerator |
| | | 7 | | { |
| | | 8 | | private readonly Board _board; |
| | | 9 | | |
| | 26 | 10 | | private readonly List<Move> _newMoves = []; |
| | | 11 | | |
| | | 12 | | private Move _lastMove; |
| | | 13 | | |
| | | 14 | | private int _moveId; |
| | | 15 | | |
| | 26 | 16 | | public MoveGenerator(Board board) |
| | | 17 | | { |
| | 26 | 18 | | _board = board; |
| | 26 | 19 | | } |
| | | 20 | | |
| | | 21 | | public List<Move> GetMoves(Move lastMove) |
| | | 22 | | { |
| | 6232 | 23 | | _lastMove = lastMove; |
| | | 24 | | |
| | 6232 | 25 | | var moves = new List<Move>(); |
| | | 26 | | |
| | 194660 | 27 | | for (var x = 0; x < _board.Width; x++) |
| | | 28 | | { |
| | 91098 | 29 | | var ball = _board.Top(x); |
| | | 30 | | |
| | 91098 | 31 | | if (ball == Colour.Empty) |
| | | 32 | | { |
| | | 33 | | continue; |
| | | 34 | | } |
| | | 35 | | |
| | 90708 | 36 | | if (_board.IsComplete(x)) |
| | | 37 | | { |
| | | 38 | | continue; |
| | | 39 | | } |
| | | 40 | | |
| | 81470 | 41 | | if (_board.IsPure(x) && _board.BallCount(x) == _board.Height - 1) |
| | | 42 | | { |
| | | 43 | | continue; |
| | | 44 | | } |
| | | 45 | | |
| | 70282 | 46 | | GetMoves(ball, x); |
| | | 47 | | |
| | 174224 | 48 | | foreach (var move in _newMoves) |
| | | 49 | | { |
| | 16830 | 50 | | if (! (move.Source == _lastMove.Target && move.Target == _lastMove.Source)) |
| | | 51 | | { |
| | 12872 | 52 | | moves.Add(move); |
| | | 53 | | } |
| | | 54 | | } |
| | | 55 | | } |
| | | 56 | | |
| | 6232 | 57 | | return moves; |
| | | 58 | | } |
| | | 59 | | |
| | | 60 | | private void GetMoves(Colour ball, int source) |
| | | 61 | | { |
| | 70282 | 62 | | _newMoves.Clear(); |
| | | 63 | | |
| | 70282 | 64 | | CheckForCompletion(ball, source); |
| | | 65 | | |
| | 70282 | 66 | | if (_newMoves.Count > 0) |
| | | 67 | | { |
| | 634 | 68 | | return; |
| | | 69 | | } |
| | | 70 | | |
| | 69648 | 71 | | CheckForMerges(ball, source); |
| | | 72 | | |
| | 69648 | 73 | | if (_newMoves.Count > 0) |
| | | 74 | | { |
| | 14392 | 75 | | return; |
| | | 76 | | } |
| | | 77 | | |
| | 55256 | 78 | | if (_board.BallCount(source) > 1) |
| | | 79 | | { |
| | 53210 | 80 | | CheckForEmpty(source); |
| | | 81 | | } |
| | 55256 | 82 | | } |
| | | 83 | | |
| | | 84 | | private void CheckForCompletion(Colour ball, int source) |
| | | 85 | | { |
| | 2269084 | 86 | | for (var x = 0; x < _board.Width; x++) |
| | | 87 | | { |
| | 1064894 | 88 | | if (x == source) |
| | | 89 | | { |
| | | 90 | | continue; |
| | | 91 | | } |
| | | 92 | | |
| | 994918 | 93 | | if (_board.Top(x) == ball && _board.Capacity(x) == 1 && _board.IsPure(x)) |
| | | 94 | | { |
| | 634 | 95 | | _newMoves.Add(new Move(source, x, ++_moveId)); |
| | | 96 | | |
| | 634 | 97 | | return; |
| | | 98 | | } |
| | | 99 | | } |
| | 69648 | 100 | | } |
| | | 101 | | |
| | | 102 | | private void CheckForEmpty(int source) |
| | | 103 | | { |
| | 53210 | 104 | | if (_board.TopRunLength(source) == _board.BallCount(source)) |
| | | 105 | | { |
| | 5572 | 106 | | return; |
| | | 107 | | } |
| | | 108 | | |
| | 1563708 | 109 | | for (var x = 0; x < _board.Width; x++) |
| | | 110 | | { |
| | 736020 | 111 | | if (x == _lastMove.Target || _board.Capacity(x) == 0) |
| | | 112 | | { |
| | | 113 | | continue; |
| | | 114 | | } |
| | | 115 | | |
| | 245956 | 116 | | if (_board.IsEmpty(x)) |
| | | 117 | | { |
| | 1804 | 118 | | _newMoves.Add(new Move(source, x, ++_moveId)); |
| | | 119 | | |
| | 1804 | 120 | | return; |
| | | 121 | | } |
| | | 122 | | } |
| | 45834 | 123 | | } |
| | | 124 | | |
| | | 125 | | private void CheckForMerges(Colour ball, int source) |
| | | 126 | | { |
| | 441492 | 127 | | for (var i = _board.Height - 2; i > 0; i--) |
| | | 128 | | { |
| | 5331976 | 129 | | for (var x = 0; x < _board.Width; x++) |
| | | 130 | | { |
| | 2514890 | 131 | | if (_board.Top(x) != ball || _board.Capacity(x) == 0) |
| | | 132 | | { |
| | | 133 | | continue; |
| | | 134 | | } |
| | | 135 | | |
| | 73780 | 136 | | if (! IsMergeCandidate(x, source)) |
| | | 137 | | { |
| | | 138 | | continue; |
| | | 139 | | } |
| | | 140 | | |
| | 26954 | 141 | | if (_board.TopRunLength(x) == i) |
| | | 142 | | { |
| | 14422 | 143 | | if (_board.IsPure(source) && _board.IsPure(x) && _board.BallCount(source) > _board.BallCount(x)) |
| | | 144 | | { |
| | | 145 | | continue; |
| | | 146 | | } |
| | | 147 | | |
| | 14392 | 148 | | _newMoves.Add(new Move(source, x, ++_moveId)); |
| | | 149 | | |
| | 14392 | 150 | | return; |
| | | 151 | | } |
| | | 152 | | } |
| | | 153 | | } |
| | 55256 | 154 | | } |
| | | 155 | | |
| | | 156 | | private bool IsMergeCandidate(int x, int source) |
| | | 157 | | { |
| | 73780 | 158 | | if (x == source || _board.IsEmpty(x) || _board.IsFull(x) || _board.IsComplete(x)) |
| | | 159 | | { |
| | 46826 | 160 | | return false; |
| | | 161 | | } |
| | | 162 | | |
| | 26954 | 163 | | return true; |
| | | 164 | | } |
| | | 165 | | } |