import boto3
import json
import time
import logging
from datetime import datetime, timedelta
from typing import Dict, List, Optional, Any, Tuple
from dataclasses import dataclass, asdict
from enum import Enum
import threading
import requests
import subprocess
import uuid

class TestType(Enum):
    UNIT = "unit"
    INTEGRATION = "integration"
    END_TO_END = "end_to_end"
    REGRESSION = "regression"
    SMOKE = "smoke"
    CONTRACT = "contract"

class TestStatus(Enum):
    PENDING = "pending"
    RUNNING = "running"
    PASSED = "passed"
    FAILED = "failed"
    SKIPPED = "skipped"

class TestEnvironment(Enum):
    DEVELOPMENT = "development"
    STAGING = "staging"
    PRODUCTION = "production"
    TEST = "test"

@dataclass
class TestCase:
    test_id: str
    name: str
    description: str
    test_type: TestType
    service: str
    environment: TestEnvironment
    prerequisites: List[str]
    test_steps: List[str]
    expected_result: str
    timeout_seconds: int
    retry_count: int

@dataclass
class TestExecution:
    execution_id: str
    test_id: str
    status: TestStatus
    start_time: datetime
    end_time: Optional[datetime]
    duration_seconds: float
    result_details: str
    error_message: Optional[str]
    artifacts: List[str]

class FunctionalTestingSystem:
    def __init__(self, region: str = 'us-east-1'):
        self.region = region
        
        # AWS clients
        self.lambda_client = boto3.client('lambda', region_name=region)
        self.codebuild = boto3.client('codebuild', region_name=region)
        self.s3 = boto3.client('s3', region_name=region)
        self.cloudwatch = boto3.client('cloudwatch', region_name=region)
        
        # Configure logging
        logging.basicConfig(
            level=logging.INFO,
            format='%(asctime)s - %(name)s - %(levelname)s - %(message)s'
        )
        self.logger = logging.getLogger(__name__)
        
        # Test management
        self.test_cases: Dict[str, TestCase] = {}
        self.test_executions: List[TestExecution] = []
        self.test_suites: Dict[str, List[str]] = {}
        
        # Thread safety
        self.test_lock = threading.Lock()

    def register_test_case(self, test_case: TestCase) -> bool:
        """Register a new test case"""
        try:
            self.test_cases[test_case.test_id] = test_case
            self.logger.info(f"Registered test case: {test_case.name}")
            return True
        except Exception as e:
            self.logger.error(f"Failed to register test case: {str(e)}")
            return False

    def create_standard_test_cases(self) -> List[TestCase]:
        """Create standard functional test cases"""
        test_cases = []
        
        try:
            # API Endpoint Tests
            api_test = TestCase(
                test_id="api-health-check",
                name="API Health Check",
                description="Verify API endpoints respond correctly",
                test_type=TestType.SMOKE,
                service="api-gateway",
                environment=TestEnvironment.STAGING,
                prerequisites=["API deployed", "Database available"],
                test_steps=[
                    "Send GET request to /health endpoint",
                    "Verify response status is 200",
                    "Verify response contains expected health data"
                ],
                expected_result="HTTP 200 with valid health response",
                timeout_seconds=30,
                retry_count=3
            )
            test_cases.append(api_test)
            self.register_test_case(api_test)
            
            # Database Integration Test
            db_test = TestCase(
                test_id="database-crud-operations",
                name="Database CRUD Operations",
                description="Test create, read, update, delete operations",
                test_type=TestType.INTEGRATION,
                service="user-service",
                environment=TestEnvironment.TEST,
                prerequisites=["Database schema deployed", "Test data loaded"],
                test_steps=[
                    "Create new user record",
                    "Read user record by ID",
                    "Update user record",
                    "Delete user record",
                    "Verify record is deleted"
                ],
                expected_result="All CRUD operations complete successfully",
                timeout_seconds=60,
                retry_count=2
            )
            test_cases.append(db_test)
            self.register_test_case(db_test)
            
            # End-to-End User Journey
            e2e_test = TestCase(
                test_id="user-registration-journey",
                name="Complete User Registration Journey",
                description="Test full user registration and login flow",
                test_type=TestType.END_TO_END,
                service="web-application",
                environment=TestEnvironment.STAGING,
                prerequisites=["All services running", "Email service configured"],
                test_steps=[
                    "Navigate to registration page",
                    "Fill registration form",
                    "Submit registration",
                    "Verify email sent",
                    "Click verification link",
                    "Login with new credentials",
                    "Verify user dashboard loads"
                ],
                expected_result="User successfully registered and logged in",
                timeout_seconds=120,
                retry_count=1
            )
            test_cases.append(e2e_test)
            self.register_test_case(e2e_test)
            
            self.logger.info(f"Created {len(test_cases)} standard test cases")
            return test_cases
            
        except Exception as e:
            self.logger.error(f"Failed to create standard test cases: {str(e)}")
            return test_cases

    def execute_test_case(self, test_id: str) -> str:
        """Execute a single test case"""
        try:
            test_case = self.test_cases.get(test_id)
            if not test_case:
                raise ValueError(f"Test case {test_id} not found")
            
            execution_id = f"exec-{uuid.uuid4().hex[:8]}"
            
            execution = TestExecution(
                execution_id=execution_id,
                test_id=test_id,
                status=TestStatus.RUNNING,
                start_time=datetime.utcnow(),
                end_time=None,
                duration_seconds=0.0,
                result_details="",
                error_message=None,
                artifacts=[]
            )
            
            with self.test_lock:
                self.test_executions.append(execution)
            
            # Execute test based on type
            start_time = time.time()
            
            try:
                if test_case.test_type == TestType.SMOKE:
                    result = self._execute_smoke_test(test_case)
                elif test_case.test_type == TestType.INTEGRATION:
                    result = self._execute_integration_test(test_case)
                elif test_case.test_type == TestType.END_TO_END:
                    result = self._execute_e2e_test(test_case)
                elif test_case.test_type == TestType.UNIT:
                    result = self._execute_unit_test(test_case)
                else:
                    result = self._execute_generic_test(test_case)
                
                execution.status = TestStatus.PASSED if result['success'] else TestStatus.FAILED
                execution.result_details = result['details']
                execution.artifacts = result.get('artifacts', [])
                
            except Exception as e:
                execution.status = TestStatus.FAILED
                execution.error_message = str(e)
                execution.result_details = f"Test execution failed: {str(e)}"
            
            execution.duration_seconds = time.time() - start_time
            execution.end_time = datetime.utcnow()
            
            # Record metrics
            self._record_test_metrics(execution, test_case)
            
            self.logger.info(f"Test execution completed: {execution_id} - {execution.status.value}")
            return execution_id
            
        except Exception as e:
            self.logger.error(f"Test execution failed: {str(e)}")
            return ""

    def _execute_smoke_test(self, test_case: TestCase) -> Dict[str, Any]:
        """Execute smoke test"""
        try:
            if test_case.test_id == "api-health-check":
                # Simulate API health check
                response = requests.get("https://api.example.com/health", timeout=10)
                
                success = response.status_code == 200
                details = f"Status: {response.status_code}, Response: {response.text[:100]}"
                
                return {
                    'success': success,
                    'details': details,
                    'artifacts': [f"response-{int(time.time())}.json"]
                }
            
            return {'success': True, 'details': 'Smoke test completed'}
            
        except Exception as e:
            return {'success': False, 'details': f'Smoke test failed: {str(e)}'}

    def _execute_integration_test(self, test_case: TestCase) -> Dict[str, Any]:
        """Execute integration test"""
        try:
            if test_case.test_id == "database-crud-operations":
                # Simulate database operations
                operations = ['CREATE', 'READ', 'UPDATE', 'DELETE']
                results = []
                
                for operation in operations:
                    # Simulate operation
                    time.sleep(0.1)  # Simulate processing time
                    results.append(f"{operation}: SUCCESS")
                
                return {
                    'success': True,
                    'details': '; '.join(results),
                    'artifacts': [f"db-test-{int(time.time())}.log"]
                }
            
            return {'success': True, 'details': 'Integration test completed'}
            
        except Exception as e:
            return {'success': False, 'details': f'Integration test failed: {str(e)}'}

    def _execute_e2e_test(self, test_case: TestCase) -> Dict[str, Any]:
        """Execute end-to-end test"""
        try:
            if test_case.test_id == "user-registration-journey":
                # Simulate user journey steps
                steps = [
                    "Navigate to registration page",
                    "Fill registration form",
                    "Submit registration",
                    "Verify email sent",
                    "Click verification link",
                    "Login with credentials",
                    "Verify dashboard loads"
                ]
                
                completed_steps = []
                for step in steps:
                    time.sleep(0.2)  # Simulate step execution
                    completed_steps.append(f"✓ {step}")
                
                return {
                    'success': True,
                    'details': '\n'.join(completed_steps),
                    'artifacts': [
                        f"screenshot-{int(time.time())}.png",
                        f"browser-log-{int(time.time())}.txt"
                    ]
                }
            
            return {'success': True, 'details': 'E2E test completed'}
            
        except Exception as e:
            return {'success': False, 'details': f'E2E test failed: {str(e)}'}

    def _execute_unit_test(self, test_case: TestCase) -> Dict[str, Any]:
        """Execute unit test"""
        try:
            # Simulate unit test execution
            return {
                'success': True,
                'details': 'All unit tests passed',
                'artifacts': [f"unit-test-report-{int(time.time())}.xml"]
            }
            
        except Exception as e:
            return {'success': False, 'details': f'Unit test failed: {str(e)}'}

    def _execute_generic_test(self, test_case: TestCase) -> Dict[str, Any]:
        """Execute generic test"""
        try:
            return {
                'success': True,
                'details': f'Generic test {test_case.name} completed',
                'artifacts': []
            }
            
        except Exception as e:
            return {'success': False, 'details': f'Generic test failed: {str(e)}'}

    def execute_test_suite(self, suite_name: str) -> Dict[str, Any]:
        """Execute a complete test suite"""
        try:
            test_ids = self.test_suites.get(suite_name, [])
            if not test_ids:
                raise ValueError(f"Test suite {suite_name} not found or empty")
            
            suite_results = {
                'suite_name': suite_name,
                'total_tests': len(test_ids),
                'passed': 0,
                'failed': 0,
                'skipped': 0,
                'start_time': datetime.utcnow().isoformat(),
                'executions': []
            }
            
            for test_id in test_ids:
                execution_id = self.execute_test_case(test_id)
                if execution_id:
                    execution = next((e for e in self.test_executions if e.execution_id == execution_id), None)
                    if execution:
                        suite_results['executions'].append({
                            'test_id': test_id,
                            'execution_id': execution_id,
                            'status': execution.status.value,
                            'duration': execution.duration_seconds
                        })
                        
                        if execution.status == TestStatus.PASSED:
                            suite_results['passed'] += 1
                        elif execution.status == TestStatus.FAILED:
                            suite_results['failed'] += 1
                        else:
                            suite_results['skipped'] += 1
            
            suite_results['end_time'] = datetime.utcnow().isoformat()
            suite_results['success_rate'] = (suite_results['passed'] / suite_results['total_tests']) * 100
            
            self.logger.info(f"Test suite {suite_name} completed: {suite_results['passed']}/{suite_results['total_tests']} passed")
            return suite_results
            
        except Exception as e:
            self.logger.error(f"Test suite execution failed: {str(e)}")
            return {}

    def create_test_suite(self, suite_name: str, test_ids: List[str]) -> bool:
        """Create a new test suite"""
        try:
            # Validate test IDs exist
            for test_id in test_ids:
                if test_id not in self.test_cases:
                    raise ValueError(f"Test case {test_id} not found")
            
            self.test_suites[suite_name] = test_ids
            self.logger.info(f"Created test suite {suite_name} with {len(test_ids)} tests")
            return True
            
        except Exception as e:
            self.logger.error(f"Failed to create test suite: {str(e)}")
            return False

    def _record_test_metrics(self, execution: TestExecution, test_case: TestCase) -> None:
        """Record test metrics to CloudWatch"""
        try:
            # Record test duration
            self.cloudwatch.put_metric_data(
                Namespace='Testing/Functional',
                MetricData=[
                    {
                        'MetricName': 'TestDuration',
                        'Dimensions': [
                            {'Name': 'TestType', 'Value': test_case.test_type.value},
                            {'Name': 'Service', 'Value': test_case.service},
                            {'Name': 'Environment', 'Value': test_case.environment.value}
                        ],
                        'Value': execution.duration_seconds,
                        'Unit': 'Seconds'
                    }
                ]
            )
            
            # Record test result
            self.cloudwatch.put_metric_data(
                Namespace='Testing/Functional',
                MetricData=[
                    {
                        'MetricName': 'TestResult',
                        'Dimensions': [
                            {'Name': 'TestType', 'Value': test_case.test_type.value},
                            {'Name': 'Service', 'Value': test_case.service},
                            {'Name': 'Status', 'Value': execution.status.value}
                        ],
                        'Value': 1,
                        'Unit': 'Count'
                    }
                ]
            )
            
        except Exception as e:
            self.logger.warning(f"Failed to record test metrics: {str(e)}")

    def get_test_coverage_report(self) -> Dict[str, Any]:
        """Generate test coverage report"""
        try:
            # Analyze test coverage by service and type
            coverage_by_service = {}
            coverage_by_type = {}
            
            for test_case in self.test_cases.values():
                service = test_case.service
                test_type = test_case.test_type.value
                
                if service not in coverage_by_service:
                    coverage_by_service[service] = {'total': 0, 'types': {}}
                coverage_by_service[service]['total'] += 1
                
                if test_type not in coverage_by_service[service]['types']:
                    coverage_by_service[service]['types'][test_type] = 0
                coverage_by_service[service]['types'][test_type] += 1
                
                if test_type not in coverage_by_type:
                    coverage_by_type[test_type] = 0
                coverage_by_type[test_type] += 1
            
            # Calculate recent execution statistics
            recent_executions = [
                e for e in self.test_executions 
                if e.start_time > datetime.utcnow() - timedelta(days=7)
            ]
            
            passed_count = len([e for e in recent_executions if e.status == TestStatus.PASSED])
            total_count = len(recent_executions)
            success_rate = (passed_count / total_count * 100) if total_count > 0 else 0
            
            report = {
                'total_test_cases': len(self.test_cases),
                'coverage_by_service': coverage_by_service,
                'coverage_by_type': coverage_by_type,
                'recent_executions': {
                    'total': total_count,
                    'passed': passed_count,
                    'failed': total_count - passed_count,
                    'success_rate': success_rate
                },
                'test_suites': len(self.test_suites),
                'recommendations': self._generate_coverage_recommendations(coverage_by_service, coverage_by_type)
            }
            
            return report
            
        except Exception as e:
            self.logger.error(f"Coverage report generation failed: {str(e)}")
            return {}

    def _generate_coverage_recommendations(self, service_coverage: Dict, type_coverage: Dict) -> List[str]:
        """Generate test coverage recommendations"""
        recommendations = []
        
        try:
            # Check for services with low test coverage
            for service, coverage in service_coverage.items():
                if coverage['total'] < 3:
                    recommendations.append(f"Increase test coverage for {service} service")
                
                # Check for missing test types
                if 'unit' not in coverage['types']:
                    recommendations.append(f"Add unit tests for {service} service")
                if 'integration' not in coverage['types']:
                    recommendations.append(f"Add integration tests for {service} service")
            
            # Check overall test type balance
            total_tests = sum(type_coverage.values())
            if total_tests > 0:
                unit_percentage = type_coverage.get('unit', 0) / total_tests * 100
                if unit_percentage < 60:
                    recommendations.append("Increase unit test coverage (should be 60%+ of total tests)")
                
                e2e_percentage = type_coverage.get('end_to_end', 0) / total_tests * 100
                if e2e_percentage > 20:
                    recommendations.append("Consider reducing E2E test percentage (should be <20% of total tests)")
            
            return recommendations
            
        except Exception as e:
            self.logger.error(f"Recommendation generation failed: {str(e)}")
            return []

# Example usage
def main():
    # Initialize functional testing system
    testing_system = FunctionalTestingSystem(region='us-east-1')
    
    # Create standard test cases
    print("Creating standard functional test cases...")
    test_cases = testing_system.create_standard_test_cases()
    
    print(f"Created {len(test_cases)} test cases:")
    for test_case in test_cases:
        print(f"- {test_case.name} ({test_case.test_type.value})")
    
    # Create test suites
    testing_system.create_test_suite("smoke_tests", ["api-health-check"])
    testing_system.create_test_suite("integration_tests", ["database-crud-operations"])
    testing_system.create_test_suite("full_suite", [
        "api-health-check",
        "database-crud-operations", 
        "user-registration-journey"
    ])
    
    # Execute individual test
    print("\nExecuting API health check test...")
    execution_id = testing_system.execute_test_case("api-health-check")
    print(f"Test execution ID: {execution_id}")
    
    # Execute test suite
    print("\nExecuting smoke test suite...")
    suite_results = testing_system.execute_test_suite("smoke_tests")
    print(f"Suite results: {json.dumps(suite_results, indent=2, default=str)}")
    
    # Generate coverage report
    coverage_report = testing_system.get_test_coverage_report()
    print(f"\nTest coverage report: {json.dumps(coverage_report, indent=2)}")

if __name__ == "__main__":
    main()