import logging
import re
from datetime import datetime

import pytz

from core.config import SERVER_OWNER_CALLSIGN
from data.spot import Spot
from providers.spot.telnet_spot_provider import TelnetSpotProvider

logger = logging.getLogger(__name__)


class RBN(TelnetSpotProvider):
    """Spot provider for the Reverse Beacon Network. Connects to a single port, if you want both CW/RTTY (port 7000) and FT8
    (port 7001) you need to instantiate two copies of this. The port is provided in config."""

    _LINE_PATTERN = re.compile(
        r"^DX de ([a-z0-9/]+)-.*:\s+([0-9.]+)\s+([a-z0-9/]+)\s+(.*)\s+(\d{4}Z)",
        re.IGNORECASE,
    )

    def __init__(self, provider_config):
        """Constructor requires port number."""

        name = provider_config.get("name", "RBN")
        super().__init__(
            name,
            provider_config,
            host="telnet.reversebeacon.net",
            port=provider_config["port"],
            login_prompt="Please enter your call: ",
            login_response=SERVER_OWNER_CALLSIGN,
        )

    def _parse_line(self, line):
        match = self._LINE_PATTERN.match(line)
        if not match:
            return None

        spot_time = datetime.strptime(match.group(5), "%H%MZ").replace(tzinfo=pytz.UTC)
        spot_datetime = datetime.combine(
            datetime.now(pytz.UTC).date(),
            spot_time.time(),
            tzinfo=pytz.UTC,
        )
        return Spot(
            source=self.name,
            dx_call=match.group(3),
            de_call=match.group(1),
            freq=float(match.group(2)) * 1000,
            comment=match.group(4).strip(),
            time=spot_datetime.timestamp(),
        )