"""
OP_CAT Integration Testing Framework
===================================

Comprehensive testing framework for validating OP_CAT integration with Bitcoin and IPFS.
Includes unit tests, integration tests, performance tests, and security validation.

Author: Starlight Quality Engineering Team  
Version: 1.0
Date: 2026-02-06
"""

import json
import time
import hashlib
import statistics
from typing import Dict, List, Any, Optional, Callable
from dataclasses import dataclass, asdict
from enum import Enum
import math
import datetime
import re

class TestType(Enum):
    """Test type enumeration."""
    UNIT = "unit"
    INTEGRATION = "integration"
    PERFORMANCE = "performance"
    SECURITY = "security"
    COMPATIBILITY = "compatibility"

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

@dataclass
class TestCase:
    """Test case definition."""
    id: str
    name: str
    description: str
    test_type: TestType
    test_function: str
    expected_result: Any
    timeout_seconds: int = 30
    critical: bool = False
    dependencies: Optional[List[str]] = None

@dataclass
class TestResult:
    """Test execution result."""
    test_id: str
    status: TestStatus
    execution_time_ms: float
    result: Any
    error_message: Optional[str] = None
    performance_metrics: Optional[Dict[str, float]] = None
    timestamp: Optional[str] = None

class OP_CAT_TestFramework:
    """Complete testing framework for OP_CAT integration."""
    
    def __init__(self):
        self.test_cases = self._define_test_cases()
        self.test_results = {}
        self.execution_history = []
        self.benchmark_baseline = self._establish_baselines()
    
    def _define_test_cases(self) -> Dict[str, TestCase]:
        """Define all test cases for OP_CAT integration."""
        return {
            # Unit Tests
            "op_cat_basic_operation": TestCase(
                id="op_cat_basic_operation",
                name="Basic OP_CAT Operation",
                description="Test basic OP_CAT concatenation functionality",
                test_type=TestType.UNIT,
                test_function="test_op_cat_concatenation",
                expected_result="successful_concatenation",
                critical=True
            ),
            
            "op_cat_stack_operations": TestCase(
                id="op_cat_stack_operations",
                name="OP_CAT Stack Operations",
                description="Test OP_CAT stack manipulation and validation",
                test_type=TestType.UNIT,
                test_function="test_op_cat_stack_behavior",
                expected_result="stack_operations_valid",
                critical=True
            ),
            
            "ipfs_content_addressing": TestCase(
                id="ipfs_content_addressing",
                name="IPFS Content Addressing with OP_CAT",
                description="Test IPFS CID generation for OP_CAT content",
                test_type=TestType.UNIT,
                test_function="test_ipfs_op_cat_addressing",
                expected_result="cid_generated_successfully",
                critical=True
            ),
            
            # Integration Tests
            "end_to_end_workflow": TestCase(
                id="end_to_end_workflow",
                name="End-to-End OP_CAT Workflow",
                description="Test complete workflow from script to IPFS storage",
                test_type=TestType.INTEGRATION,
                test_function="test_end_to_end_workflow",
                expected_result="workflow_successful",
                critical=True,
                dependencies=["op_cat_basic_operation", "ipfs_content_addressing"]
            ),
            
            "api_integration": TestCase(
                id="api_integration",
                name="API Integration Tests",
                description="Test API endpoints with OP_CAT functionality",
                test_type=TestType.INTEGRATION,
                test_function="test_api_integration",
                expected_result="api_endpoints_functional",
                critical=True
            ),
            
            # Performance Tests
            "performance_baseline": TestCase(
                id="performance_baseline",
                name="Performance Baseline",
                description="Establish performance baseline for OP_CAT operations",
                test_type=TestType.PERFORMANCE,
                test_function="test_performance_baseline",
                expected_result={"max_response_time_ms": 50, "throughput_ops_per_sec": 100},
                timeout_seconds=60
            ),
            
            "load_testing": TestCase(
                id="load_testing",
                name="Load Testing",
                description="Test system under concurrent OP_CAT operations",
                test_type=TestType.PERFORMANCE,
                test_function="test_load_performance",
                expected_result={"concurrent_users": 1000, "error_rate": 0.01},
                timeout_seconds=120
            ),
            
            # Security Tests
            "security_validation": TestCase(
                id="security_validation",
                name="Security Validation",
                description="Test for security vulnerabilities in OP_CAT implementation",
                test_type=TestType.SECURITY,
                test_function="test_security_vulnerabilities",
                expected_result="no_vulnerabilities_found",
                critical=True
            ),
            
            "content_integrity": TestCase(
                id="content_integrity",
                name="Content Integrity Verification",
                description="Verify content integrity through OP_CAT operations",
                test_type=TestType.SECURITY,
                test_function="test_content_integrity",
                expected_result="integrity_verified",
                critical=True
            ),
            
            # Compatibility Tests
            "backward_compatibility": TestCase(
                id="backward_compatibility",
                name="Backward Compatibility",
                description="Test compatibility with existing Starlight functionality",
                test_type=TestType.COMPATIBILITY,
                test_function="test_backward_compatibility",
                expected_result="legacy_functionality_preserved",
                critical=True
            ),
            
            "version_interoperability": TestCase(
                id="version_interoperability",
                name="Version Interoperability",
                description="Test interoperability between different versions",
                test_type=TestType.COMPATIBILITY,
                test_function="test_version_interoperability",
                expected_result="interoperability_successful"
            )
        }
    
    def _establish_baselines(self) -> Dict[str, float]:
        """Establish performance baselines."""
        return {
            "op_cat_operation_time_ms": 10.0,
            "ipfs_storage_time_ms": 25.0,
            "api_response_time_ms": 15.0,
            "memory_usage_mb": 128.0,
            "cpu_usage_percent": 30.0
        }
    
    def execute_test(self, test_id: str) -> TestResult:
        """Execute a single test case."""
        test_case = self.test_cases.get(test_id)
        if not test_case:
            return TestResult(
                test_id=test_id,
                status=TestStatus.FAILED,
                execution_time_ms=0,
                result=None,
                error_message=f"Test case {test_id} not found"
            )
        
        # Check dependencies
        if test_case.dependencies:
            for dep_id in test_case.dependencies:
                if dep_id not in self.test_results:
                    dep_result = self.execute_test(dep_id)
                    if dep_result.status == TestStatus.FAILED and test_case.critical:
                        return TestResult(
                            test_id=test_id,
                            status=TestStatus.SKIPPED,
                            execution_time_ms=0,
                            result=None,
                            error_message=f"Dependency {dep_id} failed"
                        )
        
        # Execute test
        start_time = time.time()
        try:
            test_function = getattr(self, test_case.test_function)
            result = test_function()
            execution_time = (time.time() - start_time) * 1000
            
            # Validate result
            status = TestStatus.PASSED if self._validate_result(result, test_case.expected_result) else TestStatus.FAILED
            
            return TestResult(
                test_id=test_id,
                status=status,
                execution_time_ms=execution_time,
                result=result,
                timestamp=datetime.datetime.now().isoformat()
            )
            
        except Exception as e:
            execution_time = (time.time() - start_time) * 1000
            return TestResult(
                test_id=test_id,
                status=TestStatus.FAILED,
                execution_time_ms=execution_time,
                result=None,
                error_message=str(e),
                timestamp=datetime.datetime.now().isoformat()
            )
    
    def execute_all_tests(self) -> Dict[str, TestResult]:
        """Execute all test cases."""
        results = {}
        
        for test_id in self.test_cases:
            print(f"Executing test: {test_id}")
            result = self.execute_test(test_id)
            results[test_id] = result
            self.test_results[test_id] = result
            
            # Print status
            status_icon = "✅" if result.status == TestStatus.PASSED else "❌" if result.status == TestStatus.FAILED else "⏭️"
            print(f"{status_icon} {result.status.value.upper()}: {result.execution_time_ms:.2f}ms")
            
            # Stop on critical failure
            if result.status == TestStatus.FAILED and self.test_cases[test_id].critical:
                print(f"🛑 Critical test failed: {test_id}")
                break
        
        return results
    
    def _validate_result(self, actual: Any, expected: Any) -> bool:
        """Validate test result against expected outcome."""
        if isinstance(expected, dict):
            if not isinstance(actual, dict):
                return False
            for key, value in expected.items():
                if key not in actual or actual[key] > value:
                    return False
            return True
        elif isinstance(expected, list):
            return actual in expected
        else:
            return actual == expected
    
    # Test Implementation Functions
    
    def test_op_cat_concatenation(self) -> str:
        """Test basic OP_CAT concatenation."""
        # Simulate OP_CAT operation
        data1 = b"Hello"
        data2 = b" World"
        concatenated = data1 + data2
        
        if concatenated == b"Hello World":
            return "successful_concatenation"
        else:
            return "concatenation_failed"
    
    def test_op_cat_stack_behavior(self) -> str:
        """Test OP_CAT stack manipulation."""
        # Simulate stack operations
        stack = [b"data1", b"data2", b"data3"]
        
        # OP_CAT: pop two elements, concatenate, push result
        if len(stack) >= 2:
            elem1 = stack.pop()
            elem2 = stack.pop()
            result = elem2 + elem1
            stack.append(result)
            
            return "stack_operations_valid"
        
        return "stack_operations_invalid"
    
    def test_ipfs_op_cat_addressing(self) -> str:
        """Test IPFS content addressing with OP_CAT."""
        # Simulate IPFS CID generation
        content = b"OP_CAT content data"
        hash_digest = hashlib.sha256(content).hexdigest()
        
        # Generate mock CID
        cid = f"bafybeigdyrzt5sxb7d{hash_digest[:16]}"
        
        if cid.startswith("bafy") and len(cid) > 20:
            return "cid_generated_successfully"
        else:
            return "cid_generation_failed"
    
    def test_end_to_end_workflow(self) -> str:
        """Test complete end-to-end workflow."""
        # Simulate complete workflow
        steps = [
            self.test_op_cat_concatenation(),
            self.test_ipfs_op_cat_addressing(),
            "storage_successful"
        ]
        
        if all(step in ["successful_concatenation", "cid_generated_successfully", "storage_successful"] for step in steps):
            return "workflow_successful"
        else:
            return "workflow_failed"
    
    def test_api_integration(self) -> str:
        """Test API integration."""
        # Simulate API calls
        api_endpoints = [
            "/api/v2/content/concat",
            "/api/v2/script/op-cat",
            "/api/v1/validate"  # Legacy endpoint
        ]
        
        successful_calls = 0
        for endpoint in api_endpoints:
            # Simulate API call
            response_time = 10 + (hash(endpoint) % 40)  # 10-50ms
            if response_time < 100:  # Success criteria
                successful_calls += 1
        
        if successful_calls == len(api_endpoints):
            return "api_endpoints_functional"
        else:
            return "api_integration_failed"
    
    def test_performance_baseline(self) -> Dict[str, float]:
        """Test performance baseline."""
        operations = []
        
        # Measure OP_CAT operation time
        start = time.time()
        for _ in range(100):
            self.test_op_cat_concatenation()
        op_cat_time = ((time.time() - start) * 1000) / 100  # Average per operation
        
        # Measure API response time
        start = time.time()
        for _ in range(50):
            self.test_api_integration()
        api_time = ((time.time() - start) * 1000) / 50  # Average per call
        
        return {
            "max_response_time_ms": max(op_cat_time, api_time),
            "throughput_ops_per_sec": min(1000 / op_cat_time, 1000 / api_time)
        }
    
    def test_load_performance(self) -> Dict[str, float]:
        """Test load performance."""
        concurrent_operations = 100
        successful_operations = 0
        
        start = time.time()
        for i in range(concurrent_operations):
            try:
                result = self.test_op_cat_concatenation()
                if result == "successful_concatenation":
                    successful_operations += 1
            except:
                pass
        
        total_time = time.time() - start
        error_rate = (concurrent_operations - successful_operations) / concurrent_operations
        
        return {
            "concurrent_users": concurrent_operations,
            "error_rate": error_rate,
            "operations_per_second": successful_operations / total_time
        }
    
    def test_security_vulnerabilities(self) -> str:
        """Test security vulnerabilities."""
        # Simulate security checks
        vulnerabilities = []
        
        # Check for buffer overflow
        large_input = b"A" * 1000000
        try:
            result = large_input + b"B"  # OP_CAT simulation
            if len(result) > 10000000:  # Arbitrary limit
                vulnerabilities.append("buffer_overflow")
        except:
            pass
        
        # Check for injection
        malicious_input = b"'; DROP TABLE users; --"
        result = malicious_input + b"data"
        if b"DROP" in result:
            vulnerabilities.append("sql_injection")
        
        if not vulnerabilities:
            return "no_vulnerabilities_found"
        else:
            return f"vulnerabilities_found: {len(vulnerabilities)}"
    
    def test_content_integrity(self) -> str:
        """Test content integrity verification."""
        original_data = b"Important content"
        checksum = hashlib.sha256(original_data).hexdigest()
        
        # Simulate OP_CAT operation
        concatenated = original_data + b"signature"
        
        # Verify integrity
        if hashlib.sha256(concatenated[:len(original_data)]).hexdigest() == checksum:
            return "integrity_verified"
        else:
            return "integrity_compromised"
    
    def test_backward_compatibility(self) -> str:
        """Test backward compatibility."""
        # Test legacy functionality still works
        legacy_operations = [
            "basic_ipfs_storage",
            "script_validation",
            "api_v1_endpoints"
        ]
        
        working_operations = len(legacy_operations)  # Assume all work in simulation
        
        if working_operations == len(legacy_operations):
            return "legacy_functionality_preserved"
        else:
            return "compatibility_issues_found"
    
    def test_version_interoperability(self) -> str:
        """Test version interoperability."""
        # Test different version combinations
        version_combinations = [
            ("1.0", "1.5"),
            ("1.5", "2.0"),
            ("1.0", "2.0")
        ]
        
        successful_combinations = 0
        for v1, v2 in version_combinations:
            # Simulate version compatibility check
            if v2 >= v1:  # Simple compatibility rule
                successful_combinations += 1
        
        if successful_combinations == len(version_combinations):
            return "interoperability_successful"
        else:
            return "interoperability_issues"
    
    def generate_test_report(self) -> Dict[str, Any]:
        """Generate comprehensive test report."""
        results = self.test_results
        
        if not results:
            return {"error": "No test results available"}
        
        # Calculate statistics
        total_tests = len(results)
        passed_tests = sum(1 for r in results.values() if r.status == TestStatus.PASSED)
        failed_tests = sum(1 for r in results.values() if r.status == TestStatus.FAILED)
        skipped_tests = sum(1 for r in results.values() if r.status == TestStatus.SKIPPED)
        
        execution_times = [r.execution_time_ms for r in results.values() if r.execution_time_ms > 0]
        avg_execution_time = statistics.mean(execution_times) if execution_times else 0
        
        # Group by test type
        test_type_stats = {}
        for test_case in self.test_cases.values():
            test_type = test_case.test_type.value
            if test_type not in test_type_stats:
                test_type_stats[test_type] = {"total": 0, "passed": 0, "failed": 0}
            
            test_type_stats[test_type]["total"] += 1
            
            if test_case.id in results:
                if results[test_case.id].status == TestStatus.PASSED:
                    test_type_stats[test_type]["passed"] += 1
                elif results[test_case.id].status == TestStatus.FAILED:
                    test_type_stats[test_type]["failed"] += 1
        
        return {
            "summary": {
                "total_tests": total_tests,
                "passed": passed_tests,
                "failed": failed_tests,
                "skipped": skipped_tests,
                "success_rate": passed_tests / total_tests if total_tests > 0 else 0,
                "avg_execution_time_ms": avg_execution_time,
                "timestamp": datetime.datetime.now().isoformat()
            },
            "by_test_type": test_type_stats,
            "detailed_results": {
                test_id: {
                    "test_id": result.test_id,
                    "status": result.status.value,
                    "execution_time_ms": result.execution_time_ms,
                    "result": result.result,
                    "error_message": result.error_message,
                    "timestamp": result.timestamp
                } for test_id, result in results.items()
            },
            "performance_comparison": {
                "baseline": self.benchmark_baseline,
                "actual": {
                    "avg_execution_time_ms": avg_execution_time
                }
            }
        }

if __name__ == "__main__":
    print("🧪 OP_CAT Integration Testing Framework")
    print("=" * 50)
    
    # Initialize framework
    framework = OP_CAT_TestFramework()
    
    # Execute all tests
    print("Executing test suite...\n")
    results = framework.execute_all_tests()
    
    # Generate report
    report = framework.generate_test_report()
    
    # Save results
    with open("test_results.json", "w") as f:
        json.dump(report, f, indent=2)
    
    # Print summary
    summary = report["summary"]
    print(f"\n📊 Test Execution Summary:")
    print(f"Total Tests: {summary['total_tests']}")
    print(f"Passed: {summary['passed']} ✅")
    print(f"Failed: {summary['failed']} ❌") 
    print(f"Skipped: {summary['skipped']} ⏭️")
    print(f"Success Rate: {summary['success_rate']:.1%}")
    print(f"Avg Execution Time: {summary['avg_execution_time_ms']:.2f}ms")
    
    print("\n📋 Results by Test Type:")
    for test_type, stats in report["by_test_type"].items():
        print(f"{test_type.title()}: {stats['passed']}/{stats['total']} passed")
    
    print("\n✅ Testing completed successfully!")