"""
Alpha Vantage Data Fetcher
Fetches stock quotes and data from Alpha Vantage API
Returns JSON output for Qt/C++ integration
"""

import sys
import json
import os
import requests
from typing import Dict, Any

# API Configuration
API_KEY = os.environ.get('ALPHA_VANTAGE_API_KEY', '')
BASE_URL = "https://www.alphavantage.co/query"


def get_quote(symbol: str) -> Dict[str, Any]:
    """Fetch real-time quote for a stock symbol"""
    try:
        if not API_KEY:
            return {"error": "Alpha Vantage API key not configured"}

        params = {
            'function': 'GLOBAL_QUOTE',
            'symbol': symbol,
            'apikey': API_KEY
        }

        response = requests.get(BASE_URL, params=params, timeout=10)
        response.raise_for_status()

        data = response.json()

        if 'Global Quote' not in data:
            return {"error": "No data returned for symbol", "symbol": symbol}

        quote = data['Global Quote']

        result = {
            "symbol": symbol,
            "price": float(quote.get('05. price', 0)),
            "change": float(quote.get('09. change', 0)),
            "change_percent": quote.get('10. change percent', '0'),
            "volume": int(quote.get('06. volume', 0)),
            "open": float(quote.get('02. open', 0)),
            "high": float(quote.get('03. high', 0)),
            "low": float(quote.get('04. low', 0)),
            "previous_close": float(quote.get('08. previous close', 0)),
            "trading_day": quote.get('07. latest trading day', '')
        }

        return result

    except requests.exceptions.RequestException as e:
        return {"error": f"Network error: {str(e)}", "symbol": symbol}
    except Exception as e:
        return {"error": str(e), "symbol": symbol}


def main(args=None):
    """Main CLI entry point"""
    if args is None:
        args = sys.argv[1:]

    if len(args) < 2:
        print(json.dumps({
            "error": "Usage: python alphavantage_data.py quote <symbol>"
        }))
        sys.exit(1)

    command = args[0]
    symbol = args[1]

    if command == "quote":
        result = get_quote(symbol)
        print(json.dumps(result, indent=2))
    else:
        print(json.dumps({"error": f"Unknown command: {command}"}))
        sys.exit(1)


if __name__ == "__main__":
    main()