"""Test coverage for exclusion semantic components."""

import pytest
from unittest.mock import Mock


class TestExclusionImports:
    """Test that exclusion components can be imported."""
    
    def test_witness_semantics_import(self):
        """Test WitnessSemantics can be imported."""
        from model_checker.theory_lib.exclusion.semantic import WitnessSemantics
        assert WitnessSemantics is not None
    
    def test_witness_structure_import(self):
        """Test WitnessStructure can be imported."""
        from model_checker.theory_lib.exclusion.semantic import WitnessStructure
        assert WitnessStructure is not None
    
    def test_witness_registry_import(self):
        """Test WitnessRegistry can be imported."""
        from model_checker.theory_lib.exclusion.semantic import WitnessRegistry
        assert WitnessRegistry is not None
    
    def test_witness_proposition_import(self):
        """Test WitnessProposition can be imported."""
        from model_checker.theory_lib.exclusion.semantic import WitnessProposition
        assert WitnessProposition is not None


class TestWitnessSemanticsMethods:
    """Test WitnessSemantics methods."""
    
    def test_semantics_creation(self):
        """Test WitnessSemantics can be created with settings."""
        from model_checker.theory_lib.exclusion.semantic import WitnessSemantics
        
        settings = {'N': 2, 'max_time': 5.0}
        semantics = WitnessSemantics(settings)
        
        assert semantics is not None
        assert semantics.N == 2
        
    def test_semantics_has_methods(self):
        """Test that WitnessSemantics has expected methods."""
        from model_checker.theory_lib.exclusion.semantic import WitnessSemantics
        
        settings = {'N': 2, 'max_time': 5.0}
        semantics = WitnessSemantics(settings)
        
        # Check for key methods
        assert hasattr(semantics, 'witness_registry')
        assert hasattr(semantics, 'constraint_generator')


class TestWitnessStructureMethods:
    """Test WitnessStructure methods."""
    
    def test_structure_method_availability(self):
        """Test that WitnessStructure class has expected methods."""
        from model_checker.theory_lib.exclusion.semantic import WitnessStructure
        
        # Just check the class has expected methods without instantiating
        # (instantiation requires complex setup)
        structure_methods = [
            'find_verifying_states', 'interpret_verify', 'interpret_excludes',
            '_update_model_structure'
        ]
        
        # Check class has these methods defined
        for method_name in structure_methods:
            assert hasattr(WitnessStructure, method_name), f"WitnessStructure missing method: {method_name}"
            
    def test_printing_method_availability(self):
        """Test that WitnessStructure class has printing methods."""
        from model_checker.theory_lib.exclusion.semantic import WitnessStructure
        
        # Check for printing methods on the class
        printing_methods = [
            'print_to', 'print_all', 'print_states'
        ]
        
        # Check at least some printing methods exist on the class
        found_methods = [m for m in printing_methods if hasattr(WitnessStructure, m)]
        assert len(found_methods) > 0, "WitnessStructure should have at least one printing method"


class TestWitnessRegistryMethods:
    """Test WitnessRegistry functionality."""
    
    def test_registry_import_and_creation(self):
        """Test WitnessRegistry can be imported and created."""
        from model_checker.theory_lib.exclusion.semantic import WitnessRegistry
        
        registry = WitnessRegistry(N=2)
        assert registry is not None
        
        # Check for expected methods
        registry_methods = ['get_all_predicates', 'clear', 'register_witness_predicates']
        
        available_methods = []
        for method_name in registry_methods:
            if hasattr(registry, method_name):
                available_methods.append(method_name)
                
        # Registry should have some management methods
        assert len(available_methods) >= 1, f"Registry missing expected methods: {registry_methods}"
            
    def test_registry_functionality(self):
        """Test basic registry functionality."""
        from model_checker.theory_lib.exclusion.semantic import WitnessRegistry
        
        registry = WitnessRegistry(N=2)
        
        # Test that registry methods are callable
        if hasattr(registry, 'register_witness_predicates'):
            assert callable(getattr(registry, 'register_witness_predicates'))
            
        if hasattr(registry, 'get_all_predicates'):
            try:
                predicates = registry.get_all_predicates()
                # Should return some collection
                assert predicates is not None
            except Exception as e:
                # Method may require setup
                assert "predicate" in str(e).lower() or "setup" in str(e).lower()


class TestExclusionOperatorMethods:
    """Test exclusion operator methods."""
    
    def test_exclusion_operators_exist(self):
        """Test that witness_operators can be imported."""
        from model_checker.theory_lib.exclusion.operators import witness_operators
        from model_checker.syntactic.collection import OperatorCollection
        
        assert witness_operators is not None
        assert isinstance(witness_operators, OperatorCollection)
        
    def test_operators_have_excludes(self):
        """Test that exclusion operators include standard operators."""
        from model_checker.theory_lib.exclusion.operators import witness_operators
        
        # Check that witness operators include negation (the key operator for exclusion)
        operator_names = [name for name, _ in witness_operators.items()]
        assert '\\neg' in operator_names, "Negation operator should exist for exclusion semantics"
        
    def test_operators_have_requirements(self):
        """Test that operators have proper structure."""
        from model_checker.theory_lib.exclusion.operators import witness_operators
        
        for name, operator in witness_operators.items():
            # Each operator should have required fields (Operator class instances)
            assert hasattr(operator, 'symbol') or hasattr(operator, 'name') or hasattr(operator, '__class__')


class TestExclusionExamplesMethods:
    """Test exclusion examples functionality."""
    
    def test_examples_import(self):
        """Test that examples can be imported."""
        from model_checker.theory_lib.exclusion import examples
        
        assert examples is not None
        
    def test_example_structure(self):
        """Test that examples have proper structure."""
        from model_checker.theory_lib.exclusion.examples import example_range
        
        # Should have an example_range dictionary
        assert isinstance(example_range, dict)
        
        # Each example should be a tuple/list with [premises, conclusions, settings]
        for name, example in example_range.items():
            assert isinstance(example, (list, tuple))
            assert len(example) >= 3  # premises, conclusions, settings