exchange_monitor.py

from datetime import datetime

from config import EXCHANGE_RATE_BASE_CURRENCY, EXCHANGE_RATE_TARGET_CURRENCY, THRESHOLD
from email_notifier import EmailNotifier
from exchange_rate_service import ExchangeRateService
from template_renderer import render_template


class ExchangeMonitor:
    def __init__(self):
        self.rate_service = ExchangeRateService()
        self.notifier = EmailNotifier()

    def check_rate_and_notify(self):
        rate = self.rate_service.get_base_to_target_currency()

        if not rate:
            return

        if rate <= THRESHOLD:
            return

        subject = (
            f"🚨 {EXCHANGE_RATE_BASE_CURRENCY}/"
            f"{EXCHANGE_RATE_TARGET_CURRENCY} Alert"
        )

        html_body = render_template(
            "exchange_alert_email.html",
            {
                "rate": f"{rate:.2f}",
                "threshold": THRESHOLD,
                "base_currency": EXCHANGE_RATE_BASE_CURRENCY,
                "target_currency": EXCHANGE_RATE_TARGET_CURRENCY,
                "timestamp": datetime.now().strftime("%Y-%m-%d %H:%M:%S"),
            },
        )

        self.notifier.send_email(subject, html_body, html=True)