#!/usr/bin/env python3
"""
Cron script: fetch daily USD/VND exchange rate via yfinance.
Run by systemd timer pfm-fxrate.timer at 8AM daily.
Always force-refreshes regardless of cache.
"""

import sys
import os
sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

from app import create_app
from app.services.fx_service import force_refresh

app = create_app()

if __name__ == '__main__':
    with app.app_context():
        print('[fx_rate] Fetching fresh USD/VND rate...')
        result = force_refresh()
        if result:
            status = '(stale fallback)' if result.get('is_stale') else ''
            print(f'[fx_rate] 1 USD = ₫{result["rate"]:,.0f} VND '
                  f'[{result["source"]}] {result["date"]} {status}')
        else:
            print('[fx_rate] Failed to fetch rate from all sources.')
            sys.exit(1)