from datetime import date

import requests
import logging

logger = logging.getLogger(__name__)


class CurrencyService:
    BASE_URL = "https://cbu.uz/oz/arkhiv-kursov-valyut/json"
    CODES = ("USD", "EUR", "RUB")
    TIMEOUT_SECONDS = 5

    @classmethod
    def get_rates(cls, target_date=None) -> dict:
        if target_date is None:
            target_date = date.today()
        date_str = target_date.strftime("%Y-%m-%d")

        rates = {}
        for code in cls.CODES:
            url = f"{cls.BASE_URL}/{code}/{date_str}/"
            try:
                response = requests.get(url, timeout=cls.TIMEOUT_SECONDS)
                response.raise_for_status()
                payload = response.json()
                if isinstance(payload, list) and payload:
                    rate_value = payload[0].get("Rate")
                    if rate_value:
                        rates[code] = rate_value
            except (requests.RequestException, ValueError) as e:
                logger.exception(f"CBU API error for {code}: {e}")
        return rates