# file: tests/test_models_rect.py 
"""Unit tests for Wrdler rectangular grid support in models.py"""
import pytest
from wrdler.models import Coord, Word, Puzzle, GameState


class TestCoordRectangular:
    """Tests for Coord.in_bounds_rect() method"""
    
    def test_in_bounds_rect_valid_coords(self):
        """Test that valid coordinates pass boundary check"""
        # 6 rows x 8 cols (Wrdler grid)
        assert Coord(0, 0).in_bounds_rect(6, 8) is True
        assert Coord(5, 7).in_bounds_rect(6, 8) is True  # Bottom-right corner
        assert Coord(3, 4).in_bounds_rect(6, 8) is True  # Middle
    
    def test_in_bounds_rect_invalid_coords(self):
        """Test that out-of-bounds coordinates fail boundary check"""
        # 6 rows x 8 cols
        assert Coord(6, 0).in_bounds_rect(6, 8) is False  # Row too large
        assert Coord(0, 8).in_bounds_rect(6, 8) is False  # Col too large
        assert Coord(-1, 0).in_bounds_rect(6, 8) is False  # Negative row
        assert Coord(0, -1).in_bounds_rect(6, 8) is False  # Negative col
    
    def test_in_bounds_backward_compatibility(self):
        """Test that legacy in_bounds() still works for square grids"""
        assert Coord(0, 0).in_bounds(12) is True
        assert Coord(11, 11).in_bounds(12) is True
        assert Coord(12, 0).in_bounds(12) is False


class TestPuzzleRectangular:
    """Tests for Puzzle with rectangular grid dimensions"""
    
    def test_puzzle_default_dimensions(self):
        """Test that Puzzle defaults to Wrdler dimensions (6x8)"""
        puzzle = Puzzle(words=[])
        assert puzzle.grid_rows == 6
        assert puzzle.grid_cols == 8
    
    def test_puzzle_custom_dimensions(self):
        """Test that Puzzle can use custom dimensions"""
        puzzle = Puzzle(words=[], grid_rows=10, grid_cols=12)
        assert puzzle.grid_rows == 10
        assert puzzle.grid_cols == 12
    
    def test_puzzle_no_radar_field(self):
        """Test that radar field is removed from Puzzle"""
        puzzle = Puzzle(words=[])
        assert not hasattr(puzzle, 'radar')


class TestGameStateRectangular:
    """Tests for GameState with rectangular grid support"""
    
    def test_gamestate_default_dimensions(self):
        """Test that GameState defaults to Wrdler dimensions (6x8)"""
        state = GameState()
        assert state.grid_rows == 6
        assert state.grid_cols == 8
    
    def test_gamestate_free_letters_field(self):
        """Test that free_letters field exists and is initialized"""
        state = GameState()
        assert hasattr(state, 'free_letters')
        assert isinstance(state.free_letters, set)
        assert len(state.free_letters) == 0
    
    def test_gamestate_free_letters_used_field(self):
        """Test that free_letters_used field exists and is initialized to 0"""
        state = GameState()
        assert hasattr(state, 'free_letters_used')
        assert state.free_letters_used == 0
    
    def test_gamestate_grid_size_property_square(self):
        """Test grid_size property works for square grids"""
        state = GameState(grid_rows=12, grid_cols=12)
        assert state.grid_size == 12
    
    def test_gamestate_grid_size_property_rectangular_raises(self):
        """Test grid_size property raises ValueError for rectangular grids"""
        state = GameState(grid_rows=6, grid_cols=8)
        with pytest.raises(ValueError, match="grid_size not applicable"):
            _ = state.grid_size


class TestWordHorizontalOnly:
    """Tests for Word with horizontal-only placement (Wrdler requirement)"""
    
    def test_word_horizontal_valid(self):
        """Test that horizontal words are created correctly"""
        word = Word(text="WORD", start=Coord(0, 0), direction="H")
        assert word.direction == "H"
        assert len(word.cells) == 4
        assert word.cells[0] == Coord(0, 0)
        assert word.cells[3] == Coord(0, 3)
    
    def test_word_horizontal_fits_in_8_cols(self):
        """Test that words fit within 8-column grid"""
        # Max length word (8 letters) starting at column 0
        word = Word(text="TESTWORD", start=Coord(0, 0), direction="H")
        assert all(c.in_bounds_rect(6, 8) for c in word.cells)
        
        # 4-letter word starting at column 4 (last cell at column 7)
        word = Word(text="TEST", start=Coord(0, 4), direction="H")
        assert all(c.in_bounds_rect(6, 8) for c in word.cells)


if __name__ == "__main__":
    pytest.main([__file__, "-v"])