| | | 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 | | |
| | | 10 | | private int _moveId; |
| | | 11 | | |
| | 26 | 12 | | private readonly List<Move> _newMoves = []; |
| | | 13 | | |
| | 26 | 14 | | public MoveGenerator(Board board) |
| | | 15 | | { |
| | 26 | 16 | | _board = board; |
| | 26 | 17 | | } |
| | | 18 | | |
| | | 19 | | public List<Move> GetMoves(Move lastMove) |
| | | 20 | | { |
| | 6234 | 21 | | var moves = new List<Move>(); |
| | | 22 | | |
| | 194716 | 23 | | for (var x = 0; x < _board.Width; x++) |
| | | 24 | | { |
| | 91124 | 25 | | var ball = _board.Top(x); |
| | | 26 | | |
| | 91124 | 27 | | if (ball == Colour.Empty) |
| | | 28 | | { |
| | | 29 | | continue; |
| | | 30 | | } |
| | | 31 | | |
| | 90734 | 32 | | if (_board.IsComplete(x)) |
| | | 33 | | { |
| | | 34 | | continue; |
| | | 35 | | } |
| | | 36 | | |
| | 81494 | 37 | | if (_board.IsPure(x) && _board.BallCount(x) == _board.Height - 1) |
| | | 38 | | { |
| | | 39 | | continue; |
| | | 40 | | } |
| | | 41 | | |
| | 70302 | 42 | | GetMoves(ball, x); |
| | | 43 | | |
| | 174472 | 44 | | foreach (var move in _newMoves) |
| | | 45 | | { |
| | 16934 | 46 | | if (! (move.Source == lastMove.Target && move.Target == lastMove.Source)) |
| | | 47 | | { |
| | 12972 | 48 | | moves.Add(move); |
| | | 49 | | } |
| | | 50 | | } |
| | | 51 | | } |
| | | 52 | | |
| | 6234 | 53 | | return moves; |
| | | 54 | | } |
| | | 55 | | |
| | | 56 | | private void GetMoves(Colour ball, int source) |
| | | 57 | | { |
| | 70302 | 58 | | _newMoves.Clear(); |
| | | 59 | | |
| | 70302 | 60 | | CheckForCompletion(ball, source); |
| | | 61 | | |
| | 70302 | 62 | | if (_newMoves.Count > 0) |
| | | 63 | | { |
| | 7910 | 64 | | return; |
| | | 65 | | } |
| | | 66 | | |
| | 62392 | 67 | | CheckForMerges(ball, source); |
| | | 68 | | |
| | 62392 | 69 | | if (_newMoves.Count > 0) |
| | | 70 | | { |
| | 7122 | 71 | | return; |
| | | 72 | | } |
| | | 73 | | |
| | 55270 | 74 | | if (_board.BallCount(source) > 1) |
| | | 75 | | { |
| | 53224 | 76 | | CheckForEmpty(source); |
| | | 77 | | } |
| | 55270 | 78 | | } |
| | | 79 | | |
| | | 80 | | private void CheckForCompletion(Colour ball, int source) |
| | | 81 | | { |
| | 2279776 | 82 | | for (var x = 0; x < _board.Width; x++) |
| | | 83 | | { |
| | 1069586 | 84 | | if (x == source) |
| | | 85 | | { |
| | | 86 | | continue; |
| | | 87 | | } |
| | | 88 | | |
| | 999284 | 89 | | if (_board.Top(x) == ball && _board.Capacity(x) == 1) |
| | | 90 | | { |
| | 7948 | 91 | | _newMoves.Add(new Move(source, x, ++_moveId)); |
| | | 92 | | } |
| | | 93 | | } |
| | 70302 | 94 | | } |
| | | 95 | | |
| | | 96 | | private void CheckForEmpty(int source) |
| | | 97 | | { |
| | 53224 | 98 | | if (_board.TopRunLength(source) == _board.BallCount(source)) |
| | | 99 | | { |
| | 5574 | 100 | | return; |
| | | 101 | | } |
| | | 102 | | |
| | 1564044 | 103 | | for (var x = 0; x < _board.Width; x++) |
| | | 104 | | { |
| | 736176 | 105 | | if (_board.IsEmpty(x)) |
| | | 106 | | { |
| | 1804 | 107 | | _newMoves.Add(new Move(source, x, ++_moveId)); |
| | | 108 | | |
| | 1804 | 109 | | return; |
| | | 110 | | } |
| | | 111 | | } |
| | 45846 | 112 | | } |
| | | 113 | | |
| | | 114 | | private void CheckForMerges(Colour ball, int source) |
| | | 115 | | { |
| | 438220 | 116 | | for (var i = _board.Height - 2; i > 0; i--) |
| | | 117 | | { |
| | 5193040 | 118 | | for (var x = 0; x < _board.Width; x++) |
| | | 119 | | { |
| | 2446984 | 120 | | if (_board.Top(x) != ball) |
| | | 121 | | { |
| | | 122 | | continue; |
| | | 123 | | } |
| | | 124 | | |
| | 216548 | 125 | | if (! IsMergeCandidate(x, source)) |
| | | 126 | | { |
| | | 127 | | continue; |
| | | 128 | | } |
| | | 129 | | |
| | 18030 | 130 | | if (_board.TopRunLength(x) == i) |
| | | 131 | | { |
| | 7212 | 132 | | if (_board.IsPure(source) && _board.IsPure(x) && _board.BallCount(source) > _board.BallCount(x)) |
| | | 133 | | { |
| | | 134 | | continue; |
| | | 135 | | } |
| | | 136 | | |
| | 7182 | 137 | | _newMoves.Add(new Move(source, x, ++_moveId)); |
| | | 138 | | |
| | 7182 | 139 | | break; |
| | | 140 | | } |
| | | 141 | | } |
| | | 142 | | } |
| | 62392 | 143 | | } |
| | | 144 | | |
| | | 145 | | private bool IsMergeCandidate(int x, int source) |
| | | 146 | | { |
| | 216548 | 147 | | if (x == source || _board.IsEmpty(x) || _board.IsFull(x) || _board.Capacity(x) == 1 || _board.IsComplete(x)) |
| | | 148 | | { |
| | 198518 | 149 | | return false; |
| | | 150 | | } |
| | | 151 | | |
| | 18030 | 152 | | return true; |
| | | 153 | | } |
| | | 154 | | } |