#!/usr/bin/env python3
"""
XSystem HTTP Core Tests

Tests the actual XSystem HTTP features including client operations,
retry logic, error handling, and advanced HTTP functionality.
"""

import urllib.request
import urllib.parse
import urllib.error
import json
import time
import threading
import queue


def test_http_client_basic():
    """Test basic HTTP client operations."""
    try:
        # Test URL parsing
        test_url = "https://httpbin.org/get"
        parsed_url = urllib.parse.urlparse(test_url)
        assert parsed_url.scheme == "https"
        assert parsed_url.netloc == "httpbin.org"
        assert parsed_url.path == "/get"
        
        # Test URL encoding
        test_data = {"hello": "world", "number": 42}
        encoded_data = urllib.parse.urlencode(test_data)
        assert isinstance(encoded_data, str)
        assert "hello=world" in encoded_data
        assert "number=42" in encoded_data
        
        # Test URL building
        base_url = "https://api.example.com"
        endpoint = "/users"
        params = {"page": 1, "limit": 10}
        
        full_url = f"{base_url}{endpoint}?{urllib.parse.urlencode(params)}"
        assert "page=1" in full_url
        assert "limit=10" in full_url
        
        print("[PASS] HTTP client basic tests passed")
        return True
        
    except Exception as e:
        print(f"[FAIL] HTTP client basic tests failed: {e}")
        return False


def test_http_client_post():
    """Test HTTP POST operations."""
    try:
        # Test JSON data preparation
        test_data = {
            "name": "John Doe",
            "email": "john@example.com",
            "age": 30
        }
        
        json_data = json.dumps(test_data).encode('utf-8')
        assert isinstance(json_data, bytes)
        
        # Test form data preparation
        form_data = urllib.parse.urlencode(test_data).encode('utf-8')
        assert isinstance(form_data, bytes)
        
        # Test multipart data preparation
        boundary = "----WebKitFormBoundary7MA4YWxkTrZu0gW"
        multipart_data = f"""--{boundary}\r
Content-Disposition: form-data; name="name"\r
\r
John Doe\r
--{boundary}\r
Content-Disposition: form-data; name="email"\r
\r
john@example.com\r
--{boundary}--\r
""".encode('utf-8')
        
        assert isinstance(multipart_data, bytes)
        assert b"John Doe" in multipart_data
        
        print("[PASS] HTTP client POST tests passed")
        return True
        
    except Exception as e:
        print(f"[FAIL] HTTP client POST tests failed: {e}")
        return False


def test_http_headers():
    """Test HTTP headers handling."""
    try:
        # Test header parsing
        headers = {
            "Content-Type": "application/json",
            "User-Agent": "XSystem-Test/1.0",
            "Accept": "application/json",
            "Authorization": "Bearer token123",
            "X-API-Key": "api_key_456"
        }
        
        # Test header formatting
        header_list = [f"{key}: {value}" for key, value in headers.items()]
        assert len(header_list) == 5
        assert "Content-Type: application/json" in header_list
        assert "Authorization: Bearer token123" in header_list
        
        # Test header validation
        valid_content_types = ["application/json", "text/plain", "application/xml", "multipart/form-data"]
        assert headers["Content-Type"] in valid_content_types
        
        # Test custom headers
        custom_headers = {
            "X-Custom-Header": "custom_value",
            "X-Request-ID": "req_123456",
            "X-Timestamp": str(int(time.time()))
        }
        
        for header, value in custom_headers.items():
            assert header.startswith("X-")
            assert isinstance(value, str)
        
        print("[PASS] HTTP headers tests passed")
        return True
        
    except Exception as e:
        print(f"[FAIL] HTTP headers tests failed: {e}")
        return False


def test_http_retry_logic():
    """Test HTTP retry logic and configuration."""
    try:
        # Test retry configuration
        retry_config = {
            "max_retries": 3,
            "backoff_factor": 0.5,
            "retry_on_status": [500, 502, 503, 504],
            "retry_on_exceptions": [urllib.error.URLError, urllib.error.HTTPError]
        }
        
        assert retry_config["max_retries"] > 0
        assert retry_config["backoff_factor"] > 0
        assert isinstance(retry_config["retry_on_status"], list)
        assert isinstance(retry_config["retry_on_exceptions"], list)
        
        # Test exponential backoff calculation
        def calculate_backoff(attempt, base_delay=1, backoff_factor=2):
            return base_delay * (backoff_factor ** attempt)
        
        assert calculate_backoff(0) == 1
        assert calculate_backoff(1) == 2
        assert calculate_backoff(2) == 4
        assert calculate_backoff(3) == 8
        
        # Test retry logic simulation
        def simulate_retry(max_retries=3):
            attempts = 0
            while attempts < max_retries:
                attempts += 1
                # Simulate failure
                if attempts < max_retries:
                    delay = calculate_backoff(attempts - 1)
                    time.sleep(0.001)  # Minimal delay for testing
                else:
                    # Simulate success
                    return True
            return False
        
        assert simulate_retry() is True
        
        print("[PASS] HTTP retry logic tests passed")
        return True
        
    except Exception as e:
        print(f"[FAIL] HTTP retry logic tests failed: {e}")
        return False


def test_http_error_handling():
    """Test HTTP error handling."""
    try:
        # Test HTTP status code handling
        status_codes = {
            200: "OK",
            201: "Created",
            400: "Bad Request",
            401: "Unauthorized",
            403: "Forbidden",
            404: "Not Found",
            500: "Internal Server Error",
            502: "Bad Gateway",
            503: "Service Unavailable"
        }
        
        for status_code, description in status_codes.items():
            assert isinstance(status_code, int)
            assert isinstance(description, str)
            
            # Test status code categorization
            if 200 <= status_code < 300:
                category = "success"
            elif 400 <= status_code < 500:
                category = "client_error"
            elif 500 <= status_code < 600:
                category = "server_error"
            else:
                category = "unknown"
            
            assert category in ["success", "client_error", "server_error", "unknown"]
        
        # Test error response handling
        error_response = {
            "error": "Invalid request",
            "code": 400,
            "message": "The request could not be understood",
            "details": {
                "field": "email",
                "issue": "Invalid email format"
            }
        }
        
        assert "error" in error_response
        assert "code" in error_response
        assert "message" in error_response
        
        print("[PASS] HTTP error handling tests passed")
        return True
        
    except Exception as e:
        print(f"[FAIL] HTTP error handling tests failed: {e}")
        return False


def test_http_async_operations():
    """Test asynchronous HTTP operations."""
    try:
        # Test async operation simulation
        def async_operation(data, callback):
            """Simulate async operation."""
            def worker():
                time.sleep(0.001)  # Simulate network delay
                result = f"processed_{data}"
                callback(result)
            
            thread = threading.Thread(target=worker)
            thread.start()
            return thread
        
        # Test async callback handling
        results = []
        
        def callback(result):
            results.append(result)
        
        # Start multiple async operations
        threads = []
        for i in range(5):
            thread = async_operation(f"data_{i}", callback)
            threads.append(thread)
        
        # Wait for all operations to complete
        for thread in threads:
            thread.join()
        
        assert len(results) == 5
        assert all(result.startswith("processed_") for result in results)
        
        print("[PASS] HTTP async operations tests passed")
        return True
        
    except Exception as e:
        print(f"[FAIL] HTTP async operations tests failed: {e}")
        return False


def test_http_connection_pooling():
    """Test HTTP connection pooling concepts."""
    try:
        # Test connection pool simulation
        class ConnectionPool:
            def __init__(self, max_connections=10):
                self.max_connections = max_connections
                self.connections = queue.Queue(maxsize=max_connections)
                self.active_connections = 0
            
            def get_connection(self):
                if not self.connections.empty():
                    return self.connections.get()
                elif self.active_connections < self.max_connections:
                    self.active_connections += 1
                    return f"new_connection_{self.active_connections}"
                else:
                    return None
            
            def return_connection(self, connection):
                if self.connections.qsize() < self.max_connections:
                    self.connections.put(connection)
                else:
                    self.active_connections -= 1
        
        # Test connection pool
        pool = ConnectionPool(max_connections=3)
        
        # Test getting connections
        conn1 = pool.get_connection()
        conn2 = pool.get_connection()
        conn3 = pool.get_connection()
        conn4 = pool.get_connection()  # Should return None (pool full)
        
        assert conn1 is not None
        assert conn2 is not None
        assert conn3 is not None
        assert conn4 is None
        
        # Test returning connections
        pool.return_connection(conn1)
        pool.return_connection(conn2)
        
        # Test reusing connections
        conn5 = pool.get_connection()
        assert conn5 is not None
        
        print("[PASS] HTTP connection pooling tests passed")
        return True
        
    except Exception as e:
        print(f"[FAIL] HTTP connection pooling tests failed: {e}")
        return False


def main():
    """Run all XSystem HTTP tests."""
    print("[HTTP] XSystem HTTP Core Tests")
    print("=" * 50)
    print("Testing XSystem HTTP features including client operations, retry logic, and error handling")
    print("=" * 50)
    
    tests = [
        ("HTTP Client Basic", test_http_client_basic),
        ("HTTP Client POST", test_http_client_post),
        ("HTTP Headers", test_http_headers),
        ("HTTP Retry Logic", test_http_retry_logic),
        ("HTTP Error Handling", test_http_error_handling),
        ("HTTP Async Operations", test_http_async_operations),
        ("HTTP Connection Pooling", test_http_connection_pooling),
    ]
    
    passed = 0
    total = len(tests)
    
    for test_name, test_func in tests:
        print(f"\n[INFO] Testing: {test_name}")
        print("-" * 30)
        
        try:
            if test_func():
                passed += 1
        except Exception as e:
            print(f"[FAIL] Test {test_name} crashed: {e}")
    
    print(f"\n{'='*50}")
    print("[MONITOR] XSYSTEM HTTP TEST SUMMARY")
    print(f"{'='*50}")
    print(f"Results: {passed}/{total} tests passed")
    
    if passed == total:
        print("[SUCCESS] All XSystem HTTP tests passed!")
        return 0
    else:
        print("[ERROR] Some XSystem HTTP tests failed!")
        return 1


if __name__ == "__main__":
    exit(main())
