"""
Tests for BecomingONE Core Engine

Tests that core modules can be imported and initialized correctly.
"""

import unittest
from datetime import datetime
from datetime import timezone

from becomingone import (
    KAIROSTemporalEngine, 
    PhaseHistory, 
    CoherenceCalculator, 
    CollapseCondition
)


class TestKAIROSTemporalEngine(unittest.TestCase):
    """Tests for the KAIROS temporal engine."""
    
    def test_import(self):
        """Test engine can be imported."""
        self.assertIsNotNone(KAIROSTemporalEngine)
    
    def test_instantiate(self):
        """Test engine can be instantiated."""
        engine = KAIROSTemporalEngine()
        self.assertIsNotNone(engine)
        self.assertEqual(engine.coherence, 1.0)
    
    def test_temporalize(self):
        """Test temporalize method works."""
        engine = KAIROSTemporalEngine()
        result = engine.temporalize(0.1)
        self.assertIsNotNone(result)
    
    def test_reset(self):
        """Test reset works."""
        engine = KAIROSTemporalEngine()
        engine.temporalize(0.1)
        engine.reset()
        self.assertEqual(engine.coherence, 1.0)
        self.assertEqual(engine.integration_count, 0)


class TestPhaseHistory(unittest.TestCase):
    """Tests for phase history tracking."""
    
    def test_import(self):
        """Test PhaseHistory can be imported."""
        self.assertIsNotNone(PhaseHistory)
    
    def test_instantiate(self):
        """Test PhaseHistory can be instantiated."""
        history = PhaseHistory()
        self.assertIsNotNone(history)
    
    def test_advance(self):
        """Test advance method works."""
        history = PhaseHistory()
        state = history.advance(0.1, "test")
        self.assertIsNotNone(state)
    
    def test_set_phase(self):
        """Test set_phase method works."""
        history = PhaseHistory()
        state = history.set_phase(0.5 + 0.5j, "test")
        self.assertIsNotNone(state)
    
    def test_current(self):
        """Test current property returns state."""
        history = PhaseHistory()
        current = history.current
        self.assertIsNotNone(current)
    
    def test_velocity(self):
        """Test velocity property works."""
        history = PhaseHistory()
        # Advance a few times
        for _ in range(5):
            history.advance(0.1, "test")
        velocity = history.velocity
        self.assertIsNotNone(velocity)


class TestCoherenceCalculator(unittest.TestCase):
    """Tests for coherence calculation."""
    
    def test_import(self):
        """Test CoherenceCalculator can be imported."""
        self.assertIsNotNone(CoherenceCalculator)
    
    def test_instantiate(self):
        """Test calculator can be instantiated."""
        calc = CoherenceCalculator()
        self.assertIsNotNone(calc)
    
    def test_update(self):
        """Test update method works."""
        calc = CoherenceCalculator()
        result = calc.update(1.0 + 0.5j)
        self.assertIsNotNone(result)
    
    def test_compute_from_phases(self):
        """Test compute_from_phases method works."""
        calc = CoherenceCalculator()
        from datetime import datetime, timedelta
        now = datetime.now(timezone.utc)
        timestamps = [now + timedelta(seconds=i) for i in range(3)]
        result = calc.compute_from_phases(
            [0.1+0.1j, 0.2+0.2j, 0.3+0.3j], 
            timestamps=timestamps,
            tau=1.0,
            omega=0.1
        )
        self.assertIsNotNone(result)


class TestCollapseCondition(unittest.TestCase):
    """Tests for collapse condition enforcement."""
    
    def test_import(self):
        """Test CollapseCondition can be imported."""
        self.assertIsNotNone(CollapseCondition)
    
    def test_instantiate(self):
        """Test collapse can be instantiated."""
        collapse = CollapseCondition()
        self.assertIsNotNone(collapse)
    
    def test_evaluate(self):
        """Test evaluate method works."""
        collapse = CollapseCondition()
        result = collapse.evaluate(0.95)
        self.assertIsNotNone(result)
    
    def test_reset(self):
        """Test reset works."""
        collapse = CollapseCondition()
        collapse.evaluate(0.95)
        collapse.reset()
        self.assertFalse(collapse.collapsed)


if __name__ == "__main__":
    unittest.main()