import logging
import requests
from datetime import datetime, timezone

logger = logging.getLogger(__name__)


def get_btc_history_eur() -> list:
    try:
        resp = requests.get(
            "https://api.coingecko.com/api/v3/coins/bitcoin/market_chart",
            params={"vs_currency": "eur", "days": "365", "interval": "daily"},
            timeout=15,
        )
        resp.raise_for_status()
        return resp.json().get("prices", [])  # [[timestamp_ms, price], ...]
    except Exception as e:
        logger.error(f"Failed to fetch BTC history: {e}")
        return []


def get_btc_ohlc_eur(days: int) -> list:
    """Fetch OHLC candles from CoinGecko. Returns [[ts_ms, open, high, low, close], ...]."""
    try:
        resp = requests.get(
            "https://api.coingecko.com/api/v3/coins/bitcoin/ohlc",
            params={"vs_currency": "eur", "days": str(days)},
            timeout=20,
        )
        resp.raise_for_status()
        return resp.json()  # [[timestamp_ms, open, high, low, close], ...]
    except Exception as e:
        logger.error(f"Failed to fetch BTC OHLC: {e}")
        return []


def aggregate_to_daily(raw: list) -> dict:
    """Collapse intraday OHLC rows into one candle per UTC calendar date.

    Returns {date_str: {open, high, low, close}} using first open, max high,
    min low, last close per day.
    """
    by_date: dict = {}
    for row in raw:
        ts_ms, o, h, l, c = row
        date = datetime.fromtimestamp(ts_ms / 1000, tz=timezone.utc).strftime("%Y-%m-%d")
        if date not in by_date:
            by_date[date] = {"open": o, "high": h, "low": l, "close": c}
        else:
            existing = by_date[date]
            existing["high"] = max(existing["high"], h)
            existing["low"] = min(existing["low"], l)
            existing["close"] = c  # last close wins
    return by_date


def get_btc_price_eur() -> float:
    try:
        resp = requests.get(
            "https://api.coingecko.com/api/v3/simple/price",
            params={"ids": "bitcoin", "vs_currencies": "eur"},
            timeout=10,
        )
        resp.raise_for_status()
        return float(resp.json()["bitcoin"]["eur"])
    except Exception as e:
        logger.error(f"Failed to fetch BTC price: {e}")
        return 0.0