"""
Tests for cascade evaluation validation functionality in openevolve.evaluator
"""

import unittest
import tempfile
import os
from unittest.mock import patch, MagicMock
from openevolve.config import Config
from openevolve.evaluator import Evaluator
from openevolve.evaluation_result import EvaluationResult


class TestCascadeValidation(unittest.IsolatedAsyncioTestCase):
    """Tests for cascade evaluation configuration validation"""

    def setUp(self):
        """Set up test evaluator with cascade validation"""
        self.config = Config()

        # Create temporary evaluator files for testing
        self.temp_dir = tempfile.mkdtemp()

    def tearDown(self):
        """Clean up temporary files"""
        # Clean up temp files more safely
        import shutil

        shutil.rmtree(self.temp_dir, ignore_errors=True)

    def _create_evaluator_file(self, filename: str, content: str) -> str:
        """Helper to create temporary evaluator file"""
        file_path = os.path.join(self.temp_dir, filename)
        with open(file_path, "w") as f:
            f.write(content)
        return file_path

    def test_cascade_validation_with_valid_evaluator(self):
        """Test cascade validation with evaluator that has cascade functions"""
        # Create evaluator with cascade functions
        evaluator_content = """
def evaluate_stage1(program_path):
    return {"stage1_score": 0.5}

def evaluate_stage2(program_path):
    return {"stage2_score": 0.7}

def evaluate_stage3(program_path):
    return {"stage3_score": 0.9}

def evaluate(program_path):
    return {"final_score": 1.0}
"""
        evaluator_path = self._create_evaluator_file("valid_cascade.py", evaluator_content)

        # Configure for cascade evaluation
        self.config.evaluator.cascade_evaluation = True
        self.config.evaluator.evaluation_file = evaluator_path

        # Should not raise warnings for valid cascade evaluator
        with patch("openevolve.evaluator.logger") as mock_logger:
            evaluator = Evaluator(self.config.evaluator, evaluator_path)

            # Should not have called warning
            mock_logger.warning.assert_not_called()

    def test_cascade_validation_warning_for_missing_functions(self):
        """Test cascade validation warns when cascade functions are missing"""
        # Create evaluator without cascade functions
        evaluator_content = """
def evaluate(program_path):
    return {"score": 0.5}
"""
        evaluator_path = self._create_evaluator_file("no_cascade.py", evaluator_content)

        # Configure for cascade evaluation
        self.config.evaluator.cascade_evaluation = True
        self.config.evaluator.evaluation_file = evaluator_path

        # Should warn about missing cascade functions
        with patch("openevolve.evaluator.logger") as mock_logger:
            evaluator = Evaluator(self.config.evaluator, evaluator_path)

            # Should have warned about missing stage functions
            mock_logger.warning.assert_called()
            warning_call = mock_logger.warning.call_args[0][0]
            self.assertIn("cascade_evaluation: true", warning_call)
            self.assertIn("evaluate_stage1", warning_call)

    def test_cascade_validation_partial_functions(self):
        """Test cascade validation with only some cascade functions"""
        # Create evaluator with only stage1
        evaluator_content = """
def evaluate_stage1(program_path):
    return {"stage1_score": 0.5}

def evaluate(program_path):
    return {"score": 0.5}
"""
        evaluator_path = self._create_evaluator_file("partial_cascade.py", evaluator_content)

        # Configure for cascade evaluation
        self.config.evaluator.cascade_evaluation = True
        self.config.evaluator.evaluation_file = evaluator_path

        # Should warn about missing additional stages
        with patch("openevolve.evaluator.logger") as mock_logger:
            evaluator = Evaluator(self.config.evaluator, evaluator_path)

            # Should warn about missing stage2/stage3
            mock_logger.warning.assert_called_once()
            warning_call = mock_logger.warning.call_args[0][0]
            self.assertIn(
                "defines 'evaluate_stage1' but no additional cascade stages", warning_call
            )

    def test_no_cascade_validation_when_disabled(self):
        """Test no validation when cascade evaluation is disabled"""
        # Create evaluator without cascade functions
        evaluator_content = """
def evaluate(program_path):
    return {"score": 0.5}
"""
        evaluator_path = self._create_evaluator_file("no_cascade.py", evaluator_content)

        # Configure WITHOUT cascade evaluation
        self.config.evaluator.cascade_evaluation = False
        self.config.evaluator.evaluation_file = evaluator_path

        # Should not perform validation or warn
        with patch("openevolve.evaluator.logger") as mock_logger:
            evaluator = Evaluator(self.config.evaluator, evaluator_path)

            # Should not warn when cascade evaluation is disabled
            mock_logger.warning.assert_not_called()

    async def test_direct_evaluate_supports_evaluation_result(self):
        """Test that _direct_evaluate supports EvaluationResult returns"""
        # Create evaluator that returns EvaluationResult
        evaluator_content = """
from openevolve.evaluation_result import EvaluationResult

def evaluate(program_path):
    return EvaluationResult(
        metrics={"score": 0.8, "accuracy": 0.9},
        artifacts={"debug_info": "test data"}
    )
"""
        evaluator_path = self._create_evaluator_file("result_evaluator.py", evaluator_content)

        self.config.evaluator.cascade_evaluation = False
        self.config.evaluator.evaluation_file = evaluator_path
        self.config.evaluator.timeout = 10

        evaluator = Evaluator(self.config.evaluator, evaluator_path)

        # Create a dummy program file
        program_path = self._create_evaluator_file("test_program.py", "def test(): pass")

        # Mock the evaluation function
        def mock_evaluate(path):
            return EvaluationResult(
                metrics={"score": 0.8, "accuracy": 0.9}, artifacts={"debug_info": "test data"}
            )

        evaluator.evaluate_function = mock_evaluate

        # Should handle EvaluationResult without issues
        result = await evaluator._direct_evaluate(program_path)

        # Should return the EvaluationResult as-is
        self.assertIsInstance(result, EvaluationResult)
        self.assertEqual(result.metrics["score"], 0.8)
        self.assertEqual(result.artifacts["debug_info"], "test data")

    async def test_direct_evaluate_supports_dict_result(self):
        """Test that _direct_evaluate still supports dict returns"""
        # Create evaluator that returns dict
        evaluator_content = """
def evaluate(program_path):
    return {"score": 0.7, "performance": 0.85}
"""
        evaluator_path = self._create_evaluator_file("dict_evaluator.py", evaluator_content)

        self.config.evaluator.cascade_evaluation = False
        self.config.evaluator.evaluation_file = evaluator_path
        self.config.evaluator.timeout = 10

        evaluator = Evaluator(self.config.evaluator, evaluator_path)

        # Create a dummy program file
        program_path = self._create_evaluator_file("test_program.py", "def test(): pass")

        # Mock the evaluation function directly
        def mock_evaluate(path):
            return {"score": 0.7, "performance": 0.85}

        evaluator.evaluate_function = mock_evaluate

        # Should handle dict result without issues
        result = await evaluator._direct_evaluate(program_path)

        # Should return the dict as-is
        self.assertIsInstance(result, dict)
        self.assertEqual(result["score"], 0.7)
        self.assertEqual(result["performance"], 0.85)

    def test_cascade_validation_with_class_based_evaluator(self):
        """Test cascade validation with class-based evaluator"""
        # Create class-based evaluator with all stages
        evaluator_content = """
class Evaluator:
    def evaluate_stage1(self, program_path):
        return {"stage1_score": 0.5}
    
    def evaluate_stage2(self, program_path):
        return {"stage2_score": 0.7}
    
    def evaluate(self, program_path):
        return {"score": 0.5}

# Module-level functions (what validation looks for)
def evaluate_stage1(program_path):
    evaluator = Evaluator()
    return evaluator.evaluate_stage1(program_path)

def evaluate_stage2(program_path):
    evaluator = Evaluator()
    return evaluator.evaluate_stage2(program_path)

def evaluate(program_path):
    evaluator = Evaluator()
    return evaluator.evaluate(program_path)
"""
        evaluator_path = self._create_evaluator_file("class_cascade.py", evaluator_content)

        # Configure for cascade evaluation
        self.config.evaluator.cascade_evaluation = True
        self.config.evaluator.evaluation_file = evaluator_path

        # Should not warn since module-level functions exist
        with patch("openevolve.evaluator.logger") as mock_logger:
            evaluator = Evaluator(self.config.evaluator, evaluator_path)

            mock_logger.warning.assert_not_called()

    def test_cascade_validation_with_syntax_error(self):
        """Test cascade validation handles syntax errors gracefully"""
        # Create evaluator with syntax error
        evaluator_content = """
def evaluate_stage1(program_path)  # Missing colon
    return {"stage1_score": 0.5}
"""
        evaluator_path = self._create_evaluator_file("syntax_error.py", evaluator_content)

        # Configure for cascade evaluation
        self.config.evaluator.cascade_evaluation = True
        self.config.evaluator.evaluation_file = evaluator_path

        # Should raise an error due to syntax error
        with self.assertRaises(Exception):  # Could be SyntaxError or other import error
            evaluator = Evaluator(self.config.evaluator, evaluator_path)

    def test_cascade_validation_nonexistent_file(self):
        """Test cascade validation with nonexistent evaluator file"""
        # Configure with nonexistent file
        nonexistent_path = "/nonexistent/path.py"
        self.config.evaluator.cascade_evaluation = True
        self.config.evaluator.evaluation_file = nonexistent_path

        # Should raise ValueError for missing file
        with self.assertRaises(ValueError) as context:
            evaluator = Evaluator(self.config.evaluator, nonexistent_path)

        self.assertIn("not found", str(context.exception))

    def test_process_evaluation_result_with_artifacts(self):
        """Test that _process_evaluation_result handles artifacts correctly"""
        evaluator_content = """
def evaluate(program_path):
    return {"score": 0.5}
"""
        evaluator_path = self._create_evaluator_file("dummy.py", evaluator_content)

        self.config.evaluator.cascade_evaluation = False  # Disable cascade to avoid warnings
        self.config.evaluator.evaluation_file = evaluator_path
        evaluator = Evaluator(self.config.evaluator, evaluator_path)

        # Test with EvaluationResult containing artifacts
        eval_result = EvaluationResult(
            metrics={"score": 0.9}, artifacts={"log": "test log", "data": [1, 2, 3]}
        )

        result = evaluator._process_evaluation_result(eval_result)

        self.assertEqual(result.metrics, {"score": 0.9})
        self.assertEqual(result.artifacts, {"log": "test log", "data": [1, 2, 3]})

    def test_process_evaluation_result_with_dict(self):
        """Test that _process_evaluation_result handles dict results correctly"""
        evaluator_content = """
def evaluate(program_path):
    return {"score": 0.5}
"""
        evaluator_path = self._create_evaluator_file("dummy.py", evaluator_content)

        self.config.evaluator.cascade_evaluation = False  # Disable cascade to avoid warnings
        self.config.evaluator.evaluation_file = evaluator_path
        evaluator = Evaluator(self.config.evaluator, evaluator_path)

        # Test with dict result
        dict_result = {"score": 0.7, "accuracy": 0.8}

        result = evaluator._process_evaluation_result(dict_result)

        self.assertEqual(result.metrics, {"score": 0.7, "accuracy": 0.8})
        self.assertEqual(result.artifacts, {})


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