"""
Fetches the Crypto Fear & Greed Index from alternative.me — completely free.
"""

import logging
import requests
from datetime import datetime, timezone

from config import FEAR_GREED_URL

logger = logging.getLogger(__name__)


class FearGreedCollector:
    def fetch(self) -> list[dict]:
        """Returns last 7 days of fear & greed data."""
        try:
            resp = requests.get(FEAR_GREED_URL, timeout=10)
            resp.raise_for_status()
            data = resp.json().get("data", [])
            return [
                {
                    "value":       int(item["value"]),
                    "label":       item["value_classification"],
                    "timestamp":   datetime.fromtimestamp(
                        int(item["timestamp"]), tz=timezone.utc
                    ).isoformat(),
                }
                for item in data
            ]
        except Exception as exc:
            logger.warning(f"[FearGreed] Fetch failed: {exc}")
            return []

    def current(self) -> dict:
        data = self.fetch()
        return data[0] if data else {"value": 50, "label": "Neutral", "timestamp": ""}