#!/usr/bin/env python3
"""
Context system test runner script.

Features:
1. Check whether the Redis service is available
2. Run all Context system tests
3. Generate a test report
"""

import os
import sys
import subprocess
import time
import redis
from typing import Optional, Tuple

# Add the project root directory to the Python path.
project_root = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
sys.path.insert(0, project_root)


def check_redis_connection(host: str = "localhost", port: int = 6379, timeout: int = 5) -> Tuple[bool, str]:
    """
    Check whether the Redis connection is available.
    
    Args:
        host: Redis host address
        port: Redis port
        timeout: Connection timeout in seconds
        
    Returns:
        (whether the connection succeeded, error message)
    """
    try:
        r = redis.Redis(host=host, port=port, socket_connect_timeout=timeout, decode_responses=True)
        r.ping()
        r.close()
        return True, "Redis connection is healthy"
    except redis.ConnectionError as e:
        return False, f"Redis connection failed: {e}"
    except Exception as e:
        return False, f"Redis check exception: {e}"


def start_redis_server() -> bool:
    """
    Try to start the Redis server.
    
    Returns:
        Whether startup succeeded.
    """
    try:
        # Check whether Redis is already running.
        if check_redis_connection()[0]:
            print("✓ Redis service is already running")
            return True
        
        # Try to start Redis.
        print("Trying to start the Redis service...")
        
        # Try to start Redis on macOS.
        if sys.platform == "darwin":
            try:
                # Start Redis with brew.
                subprocess.run(["brew", "services", "start", "redis"], 
                             check=True, capture_output=True, timeout=10)
                time.sleep(2)  # Wait for the service to start.
                if check_redis_connection()[0]:
                    print("✓ Redis service started successfully")
                    return True
            except subprocess.CalledProcessError:
                pass
            
            try:
                # Start Redis directly.
                subprocess.run(["redis-server", "--daemonize", "yes"], 
                             check=True, capture_output=True, timeout=10)
                time.sleep(2)
                if check_redis_connection()[0]:
                    print("✓ Redis service started successfully")
                    return True
            except subprocess.CalledProcessError:
                pass
        
        # Try to start Redis on Linux.
        elif sys.platform.startswith("linux"):
            try:
                subprocess.run(["sudo", "systemctl", "start", "redis"], 
                             check=True, capture_output=True, timeout=10)
                time.sleep(2)
                if check_redis_connection()[0]:
                    print("✓ Redis service started successfully")
                    return True
            except subprocess.CalledProcessError:
                pass
        
        print("⚠️  Unable to start Redis automatically; please start it manually")
        return False
        
    except Exception as e:
        print(f"⚠️  Error while starting Redis service: {e}")
        return False


def install_test_dependencies() -> bool:
    """
    Install test dependencies.
    
    Returns:
        Whether installation succeeded.
    """
    try:
        print("Checking test dependencies...")
        
        # Check pytest.
        try:
            import pytest
            print("✓ pytest is installed")
        except ImportError:
            print("Installing pytest...")
            subprocess.run([sys.executable, "-m", "pip", "install", "pytest", "pytest-asyncio"], 
                         check=True)
            print("✓ pytest installation complete")
        
        # Check redis.
        try:
            import redis
            print("✓ redis is installed")
        except ImportError:
            print("Installing redis...")
            subprocess.run([sys.executable, "-m", "pip", "install", "redis"], 
                         check=True)
            print("✓ redis installation complete")
        
        return True
        
    except Exception as e:
        print(f"⚠️  Error while installing test dependencies: {e}")
        return False


def run_tests() -> bool:
    """
    Run Context system tests.
    
    Returns:
        Whether all tests passed.
    """
    try:
        print("\n" + "="*60)
        print("Starting Context system tests")
        print("="*60)
        
        # Get the test file path.
        test_file = os.path.join(project_root, "test", "test_context_system.py")
        
        if not os.path.exists(test_file):
            print(f"❌ Test file does not exist: {test_file}")
            return False
        
        # Run tests.
        cmd = [
            sys.executable, "-m", "pytest", 
            test_file,
            "-v",  # Verbose output.
            "-s",  # Show print output.
            "--tb=short",  # Short traceback.
            "--color=yes"  # Colored output.
        ]
        
        print(f"Executing command: {' '.join(cmd)}")
        print("-" * 60)
        
        result = subprocess.run(cmd, cwd=project_root)
        
        print("-" * 60)
        if result.returncode == 0:
            app_log("✅ All tests passed!")
            return True
        else:
            print("❌ Some tests failed")
            return False
            
    except Exception as e:
        print(f"❌ Error while running tests: {e}")
        return False


def main():
    """Main function."""
    print("Context System Test Runner")
    print("=" * 40)
    
    # 1. Install dependencies.
    if not install_test_dependencies():
        print("❌ Dependency installation failed; exiting")
        return 1
    
    # 2. Check Redis connection.
    print("\nChecking Redis service...")
    redis_ok, redis_msg = check_redis_connection()
    
    if not redis_ok:
        print(f"⚠️  {redis_msg}")
        print("Trying to start Redis service...")
        
        if not start_redis_server():
            print("❌ Unable to start Redis service")
            print("Please start Redis manually and rerun the tests")
            print("Example startup commands:")
            print("  macOS: brew services start redis")
            print("  Linux: sudo systemctl start redis")
            print("  Windows: redis-server")
            return 1
    else:
        print(f"✓ {redis_msg}")
    
    # 3. Run tests.
    success = run_tests()
    
    if success:
        print("\n🎉 Context system tests complete!")
        print("The test results verify:")
        print("  ✓ Redis storage works correctly")
        print("  ✓ File system persistence works correctly")
        print("  ✓ Message management works correctly")
        print("  ✓ Context manager works correctly")
        print("  ✓ Data serialization works correctly")
        print("  ✓ Concurrent access is safe")
        return 0
    else:
        print("\n❌ Context system tests failed")
        return 1


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