"""
Test Audit Levels: S (Stop) / A (Abort) / B (Block) / C (Count)
TDD - Tests written BEFORE implementation.

Per MIGRATION_AUDIT.md:
- S: Stop - Immediate halt
- A: Abort - Cancel current operation  
- B: Block - Block future operations
- C: Count - Count only (no blocking)
"""
import pytest


class TestAuditLevels:
    """Test Audit System with S/A/B/C levels."""

    def test_audit_level_enum_exists(self):
        """AuditLevel enum should exist with S/A/B/C variants."""
        from theus_core import AuditLevel
        
        assert hasattr(AuditLevel, 'Stop')
        assert hasattr(AuditLevel, 'Abort')
        assert hasattr(AuditLevel, 'Block')
        assert hasattr(AuditLevel, 'Count')

    def test_audit_recipe_with_level(self):
        """AuditRecipe should accept level parameter."""
        from theus_core import AuditRecipe, AuditLevel
        
        recipe = AuditRecipe(
            level=AuditLevel.Block,
            threshold_max=5,
            threshold_min=2,  # Warning threshold
            reset_on_success=True
        )
        
        assert recipe.level == AuditLevel.Block
        assert recipe.threshold_max == 5
        assert recipe.threshold_min == 2

    def test_audit_system_stop_level(self):
        """S-Level: Immediate halt on first failure."""
        from theus_core import AuditSystem, AuditRecipe, AuditLevel
        
        recipe = AuditRecipe(level=AuditLevel.Stop, threshold_max=1)
        audit = AuditSystem(recipe)
        
        # First fail should raise immediately
        with pytest.raises(Exception, match="Stop"):
            audit.log_fail("test_key")

    def test_audit_system_abort_level(self):
        """A-Level: Cancel current operation but allow retry."""
        from theus_core import AuditSystem, AuditRecipe, AuditLevel, AuditAbortError
        
        recipe = AuditRecipe(level=AuditLevel.Abort, threshold_max=3)
        audit = AuditSystem(recipe)
        
        # Should abort on fail, different error type than Block
        with pytest.raises(AuditAbortError):
            audit.log_fail("test_key")

    def test_audit_system_block_level(self):
        """B-Level: Block after threshold exceeded."""
        from theus_core import AuditSystem, AuditRecipe, AuditLevel, AuditBlockError
        
        recipe = AuditRecipe(level=AuditLevel.Block, threshold_max=3)
        audit = AuditSystem(recipe)
        
        # Should not block until threshold
        audit.log_fail("test_key")  # count=1
        audit.log_fail("test_key")  # count=2
        audit.log_fail("test_key")  # count=3
        
        # Fourth should block
        with pytest.raises(AuditBlockError):
            audit.log_fail("test_key")

    def test_audit_system_count_level(self):
        """C-Level: Count only, never block."""
        from theus_core import AuditSystem, AuditRecipe, AuditLevel
        
        recipe = AuditRecipe(level=AuditLevel.Count, threshold_max=3)
        audit = AuditSystem(recipe)
        
        # Should never raise, just count
        for _ in range(10):
            audit.log_fail("test_key")  # No exception
        
        assert audit.get_count("test_key") == 10

    # @pytest.mark.skip(reason="AuditWarning requires Python warnings integration - deferred to v3.1")
    def test_audit_dual_threshold_warning(self):
        """Dual-Threshold: Warning at min, Block at max."""
        from theus_core import AuditSystem, AuditRecipe, AuditLevel, AuditWarning
        
        recipe = AuditRecipe(
            level=AuditLevel.Block,
            threshold_min=2,  # Warning
            threshold_max=5   # Block
        )
        audit = AuditSystem(recipe)
        
        audit.log_fail("test_key")  # count=1, no warning
        audit.log_fail("test_key")  # count=2, warning threshold
        
        # Third fail should trigger warning (not block)
        with pytest.warns(AuditWarning):
            audit.log_fail("test_key")  # count=3
        
        # Continue until block
        audit.log_fail("test_key")  # count=4
        audit.log_fail("test_key")  # count=5
        
        with pytest.raises(Exception):
            audit.log_fail("test_key")  # count=6, now blocked
