import logging
from datetime import datetime, timedelta

import requests
from requests_cache import CachedSession

from core.constants import HTTP_HEADERS
from data.spot import Spot
from spotproviders.http_spot_provider import HTTPSpotProvider


# Spot provider for Summits on the Air
class SOTA(HTTPSpotProvider):
    POLL_INTERVAL_SEC = 120
    # SOTA wants us to check for an "epoch" from the API and see if it's actually changed before querying the main data
    # APIs. So it's actually the EPOCH_URL that we pass into the constructor and get the superclass to call on a timer.
    # The actual data lookup all happens after parsing and checking the epoch.
    EPOCH_URL = "https://api-db2.sota.org.uk/api/spots/epoch"
    SPOTS_URL = "https://api-db2.sota.org.uk/api/spots/60/all/all"
    # SOTA spots don't contain lat/lon, we need a separate lookup for that
    SUMMIT_URL_ROOT = "https://api-db2.sota.org.uk/api/summits/"
    SUMMIT_DATA_CACHE_TIME_DAYS = 30
    SUMMIT_DATA_CACHE = CachedSession("cache/sota_summit_data_cache", expire_after=timedelta(days=SUMMIT_DATA_CACHE_TIME_DAYS))

    def __init__(self, provider_config):
        super().__init__(provider_config, self.EPOCH_URL, self.POLL_INTERVAL_SEC)
        self.api_epoch = ""

    def http_response_to_spots(self, http_response):
        # OK, source data is actually just the epoch at this point. We'll then go on to fetch real data if we know this
        # has changed.
        epoch_changed = http_response.text != self.api_epoch
        self.api_epoch = http_response.text

        new_spots = []
        # OK, if the epoch actually changed, now we make the real request for data.
        if epoch_changed:
            source_data = requests.get(self.SPOTS_URL, headers=HTTP_HEADERS).json()
            # Iterate through source data
            for source_spot in source_data:
                # Convert to our spot format
                spot = Spot(source=self.name,
                            source_id=source_spot["id"],
                            dx_call=source_spot["activatorCallsign"].upper(),
                            dx_name=source_spot["activatorName"],
                            de_call=source_spot["callsign"].upper(),
                            freq=(float(source_spot["frequency"]) * 1000000) if (source_spot["frequency"] is not None) else None, # Seen SOTA spots with no frequency!
                            mode=source_spot["mode"].upper(),
                            comment=source_spot["comments"],
                            sig="SOTA",
                            sig_refs=[source_spot["summitCode"]],
                            sig_refs_names=[source_spot["summitName"]],
                            sig_refs_urls=["https://www.sotadata.org.uk/en/summit/" + source_spot["summitCode"]],
                            time=datetime.fromisoformat(source_spot["timeStamp"]).timestamp(),
                            activation_score=source_spot["points"])

                # SOTA doesn't give summit lat/lon/grid in the main call, so we need another separate call for this
                try:
                    summit_response = self.SUMMIT_DATA_CACHE.get(self.SUMMIT_URL_ROOT + source_spot["summitCode"], headers=HTTP_HEADERS)
                    summit_data = summit_response.json()
                    spot.dx_grid = summit_data["locator"]
                    spot.dx_latitude = summit_data["latitude"]
                    spot.dx_longitude = summit_data["longitude"]
                except Exception:
                    logging.warn("Looking up summit " + source_spot["summitCode"] + " from the SOTA API failed. No summit data was available.")

                # Add to our list. Don't worry about de-duping, removing old spots etc. at this point; other code will do
                # that for us.
                new_spots.append(spot)
        return new_spots