import re
from datetime import datetime, timedelta

import pytz
from requests_cache import CachedSession

from core.constants import HTTP_HEADERS
from core.sig_utils import get_icon_for_sig, get_ref_regex_for_sig
from data.spot import Spot
from spotproviders.http_spot_provider import HTTPSpotProvider


# Spot provider for UK Packet Radio network API
class UKPacketNet(HTTPSpotProvider):
    POLL_INTERVAL_SEC = 600
    SPOTS_URL = "https://nodes.ukpacketradio.network/api/nodedata"

    def __init__(self, provider_config):
        super().__init__(provider_config, self.SPOTS_URL, self.POLL_INTERVAL_SEC)

    def http_response_to_spots(self, http_response):
        new_spots = []
        # Iterate through source data
        nodes = http_response.json()["nodes"]
        for callsign, node in nodes.items():
            # The node corresponse to the spotter here. It has an "mheard" section which indicates which nodes it has
            # recently heard, which will be our "DX". But "mheard" stations are not necessarily over RF, they could be
            # via the internet, so we also need to look up the "port" on which the station was heard, and check that it
            # is RF.
            if "mheard" in node:
                for heard in node["mheard"]:
                    heard_port_id = heard["port"]
                    if "ports" in node:
                        for listed_port in node["ports"]:
                            if listed_port["id"] == heard_port_id and listed_port["linkType"] == "RF":
                                # This is another packet station heard over RF, so we are good to create a Spot object.

                                # First build a "full" comment combining some of the extra info
                                comment = listed_port["comment"] if "comment" in listed_port else ""
                                comment = (comment + " " + listed_port["mode"]) if "mode" in listed_port else comment
                                comment = (comment + " " + listed_port["modulation"]) if "modulation" in listed_port else comment
                                comment = (comment + " " + str(listed_port["baud"]) + " baud") if "baud" in listed_port and listed_port["baud"] > 0 else comment

                                # Get frequency from the comment if it's not set properly in the data structure. This is
                                # very hacky but a lot of node comments contain their frequency as the first or second
                                # word of their comment, but not in the proper data structure field.
                                freq = listed_port["freq"] if "freq" in listed_port and listed_port["freq"] > 0 else None
                                if not freq and comment:
                                    possible_freq = comment.split(" ")[0].upper().replace("MHZ", "")
                                    if re.match(r"^[0-9.]+$", possible_freq) and possible_freq != "1200" and possible_freq != "9600":
                                        freq = float(possible_freq) * 1000000
                                    if not freq and len(comment.split(" ")) > 1:
                                        possible_freq = comment.split(" ")[1].upper().replace("MHZ", "")
                                        if re.match(r"^[0-9.]+$", possible_freq) and possible_freq != "1200" and possible_freq != "9600":
                                            freq = float(possible_freq) * 1000000
                                    # Check for a found frequency likely having been in kHz, sorry to all GHz packet folks
                                    if freq and freq > 1000000000:
                                        freq = freq / 1000

                                # Now build the spot object
                                spot = Spot(source=self.name,
                                            dx_call=heard["callsign"].upper(),
                                            de_call=node["callsign"].upper(),
                                            freq=freq,
                                            mode="PKT",
                                            comment=comment,
                                            icon="tower-cell",
                                            time=datetime.strptime(heard["lastHeard"], "%Y-%m-%d %H:%M:%S").replace(tzinfo=pytz.UTC).timestamp(),
                                            de_grid=node["location"]["locator"] if "locator" in node["location"] else None,
                                            de_latitude=node["location"]["coords"]["lat"],
                                            de_longitude=node["location"]["coords"]["lon"])

                                # 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)
                                break

        # Now we have a list of every node that heard every other node via RF, as Spothole spots. What each spot doesn't
        # yet have is a DX lat/lon/grid, because the data doesn't provide the location of the "mheard" stations within
        # the structure. However, each "heard" station should also be represented in the list somewhere with its own
        # data, and we can use that to look these up.
        for spot in new_spots:
            if spot.dx_call in nodes:
                spot.dx_grid = nodes[spot.dx_call]["location"]["locator"] if "locator" in nodes[spot.dx_call]["location"] else None
                spot.dx_latitude = nodes[spot.dx_call]["location"]["coords"]["lat"]
                spot.dx_longitude = nodes[spot.dx_call]["location"]["coords"]["lon"]

        return new_spots