"""
System Test Script
Verifies that the trading system is properly installed and configured.
"""

import sys
import os

def test_imports():
    """Test that all required modules can be imported"""
    print("Testing imports...")
    
    try:
        import pandas as pd
        print("✓ pandas imported successfully")
    except ImportError as e:
        print(f"✗ pandas import failed: {e}")
        return False
    
    try:
        import alpaca_trade_api as tradeapi
        print("✓ alpaca_trade_api imported successfully")
    except ImportError as e:
        print(f"✗ alpaca_trade_api import failed: {e}")
        return False
    
    # Test local imports
    sys.path.append('src')
    sys.path.append('config')
    
    try:
        from config.trading_config import trading_config, alpaca_config
        print("✓ trading configuration imported successfully")
    except ImportError as e:
        print(f"✗ trading configuration import failed: {e}")
        return False
    
    try:
        from src.data_handler import DataHandler
        print("✓ DataHandler imported successfully")
    except ImportError as e:
        print(f"✗ DataHandler import failed: {e}")
        return False
    
    try:
        from src.strategy import TrendFollowingStrategy
        print("✓ TrendFollowingStrategy imported successfully")
    except ImportError as e:
        print(f"✗ TrendFollowingStrategy import failed: {e}")
        return False
    
    try:
        from src.risk_manager import RiskManager
        print("✓ RiskManager imported successfully")
    except ImportError as e:
        print(f"✗ RiskManager import failed: {e}")
        return False
    
    try:
        from src.trading_engine import TradingEngine
        print("✓ TradingEngine imported successfully")
    except ImportError as e:
        print(f"✗ TradingEngine import failed: {e}")
        return False
    
    return True

def test_configuration():
    """Test configuration settings"""
    print("\nTesting configuration...")
    
    try:
        from config.trading_config import trading_config, alpaca_config
        
        print(f"✓ Trading symbol: {trading_config.symbol}")
        print(f"✓ Risk per trade: {trading_config.risk_per_trade}")
        print(f"✓ Max position size: {trading_config.max_position_size}")
        print(f"✓ Alpaca base URL: {alpaca_config.base_url}")
        
        return True
    except Exception as e:
        print(f"✗ Configuration test failed: {e}")
        return False

def test_data_connection():
    """Test connection to data source"""
    print("\nTesting data connection...")
    
    try:
        from src.data_handler import DataHandler
        
        data_handler = DataHandler()
        print("✓ DataHandler initialized")
        
        # Test getting a small amount of recent data
        try:
            bars = data_handler.get_historical_data(days=1)
            if not bars.empty:
                print(f"✓ Data connection successful - got {len(bars)} data points")
                print(f"✓ Latest price: ${bars['close'].iloc[-1]:.2f}")
                return True
            else:
                print("✗ No data received")
                return False
        except Exception as e:
            print(f"✗ Data fetch failed: {e}")
            return False
            
    except Exception as e:
        print(f"✗ DataHandler initialization failed: {e}")
        return False

def test_directory_structure():
    """Test that required directories exist"""
    print("\nTesting directory structure...")
    
    required_dirs = ['src', 'config', 'logs']
    
    for dir_name in required_dirs:
        if os.path.exists(dir_name):
            print(f"✓ {dir_name}/ directory exists")
        else:
            print(f"✗ {dir_name}/ directory missing")
            return False
    
    return True

def main():
    """Run all tests"""
    print("=" * 50)
    print("TRADING SYSTEM INSTALLATION TEST")
    print("=" * 50)
    
    tests = [
        ("Directory Structure", test_directory_structure),
        ("Module Imports", test_imports),
        ("Configuration", test_configuration),
        ("Data Connection", test_data_connection)
    ]
    
    results = []
    
    for test_name, test_func in tests:
        print(f"\n--- {test_name} ---")
        try:
            result = test_func()
            results.append((test_name, result))
        except Exception as e:
            print(f"✗ {test_name} failed with exception: {e}")
            results.append((test_name, False))
    
    print("\n" + "=" * 50)
    print("TEST SUMMARY")
    print("=" * 50)
    
    all_passed = True
    for test_name, result in results:
        status = "PASS" if result else "FAIL"
        symbol = "✓" if result else "✗"
        print(f"{symbol} {test_name}: {status}")
        if not result:
            all_passed = False
    
    print("=" * 50)
    
    if all_passed:
        print("🎉 All tests passed! The trading system is ready to use.")
        print("\nNext steps:")
        print("1. Review configuration in config/trading_config.py")
        print("2. Run backtesting: python main.py --mode backtest")
        print("3. For live trading: python main.py --mode live")
    else:
        print("❌ Some tests failed. Please fix the issues before proceeding.")
        print("\nCommon solutions:")
        print("1. Install dependencies: pip install -r requirements.txt")
        print("2. Check API credentials in .env file")
        print("3. Verify internet connection")
    
    return 0 if all_passed else 1

if __name__ == "__main__":
    exit_code = main()
    sys.exit(exit_code)