from time import time
from typing import Type, TypeVar, MutableMapping, Any, Iterable, Generator, Union
import arrow
import datetime
import math

from datapipelines import DataSource, PipelineContext, Query, NotFoundError, validate_query

from .common import RiotAPIService, APINotFoundError
from ...data import Platform, Season, Queue, SEASON_IDS, QUEUE_IDS
from ...dto.match import MatchDto, MatchListDto, TimelineDto
from ..uniquekeys import convert_region_to_platform

T = TypeVar("T")


def _get_current_time(query: MutableMapping[str, Any], context: PipelineContext = None) -> int:
    return int(time()) * 1000


class MatchAPI(RiotAPIService):
    @DataSource.dispatch
    def get(self, type: Type[T], query: MutableMapping[str, Any], context: PipelineContext = None) -> T:
        pass

    @DataSource.dispatch
    def get_many(self, type: Type[T], query: MutableMapping[str, Any], context: PipelineContext = None) -> Iterable[T]:
        pass

    _validate_get_match_query = Query. \
        has("id").as_(int).also. \
        has("platform").as_(Platform)

    @get.register(MatchDto)
    @validate_query(_validate_get_match_query, convert_region_to_platform)
    def get_match(self, query: MutableMapping[str, Any], context: PipelineContext = None) -> MatchDto:
        url = "https://{platform}.api.riotgames.com/lol/match/v3/matches/{id}".format(platform=query["platform"].value.lower(), id=query["id"])
        try:
            data = self._get(url, {}, self._get_rate_limiter(query["platform"], "matches/id"))
        except APINotFoundError as error:
            raise NotFoundError(str(error)) from error

        data["gameId"] = query["id"]
        data["region"] = query["platform"].region.value
        for p in data["participantIdentities"]:
            aid = p.get("player", {}).get("currentAccountId", None)
            if aid == 0:
                p["player"]["bot"] = True
        return MatchDto(data)

    _validate_get_many_match_query = Query. \
        has("ids").as_(Iterable).also. \
        has("platform").as_(Platform)

    @get_many.register(MatchDto)
    @validate_query(_validate_get_many_match_query, convert_region_to_platform)
    def get_many_match(self, query: MutableMapping[str, Any], context: PipelineContext = None) -> Generator[MatchDto, None, None]:
        def generator():
            for id in query["ids"]:
                url = "https://{platform}.api.riotgames.com/lol/match/v3/matches/{id}".format(platform=query["platform"].value.lower(), id=id)
                try:
                    data = self._get(url, {}, self._get_rate_limiter(query["platform"], "matches/id"))
                except APINotFoundError as error:
                    raise NotFoundError(str(error)) from error
                
                for participant in data["participants"]:
                    participant.setdefault("runes", [])
                for p in data["participantIdentities"]:
                    aid = p.get("player", {}).get("currentAccountId", None)
                    if aid == 0:
                        p["player"]["bot"] = True

                data["gameId"] = id
                data["region"] = query["platform"].region.value
                yield MatchDto(data)

        return generator()

    _validate_get_match_list_query = Query. \
        has("account.id").as_(int).also. \
        has("platform").as_(Platform).also. \
        has("beginTime").as_(int).also. \
        can_have("endTime").as_(int).also. \
        has("beginIndex").as_(int).also. \
        has("maxNumberOfMatches").as_(float).also. \
        can_have("seasons").as_(Iterable).also. \
        can_have("champion.ids").as_(Iterable).also. \
        can_have("queues").as_(Iterable)

    @get.register(MatchListDto)
    @validate_query(_validate_get_match_list_query, convert_region_to_platform)
    def get_match_list(self, query: MutableMapping[str, Any], context: PipelineContext = None) -> MatchListDto:
        params = {}

        riot_index_interval = 100
        riot_date_interval = datetime.timedelta(days=7)

        begin_time = query["beginTime"]  # type: arrow.Arrow
        end_time = query.get("endTime", arrow.now())  # type: arrow.Arrow
        if isinstance(begin_time, int):
            begin_time = arrow.get(begin_time / 1000)
        if isinstance(end_time, int):
            end_time = arrow.get(end_time / 1000)

        def determine_calling_method(begin_time, end_time) -> str:
            """Returns either "by_date" or "by_index"."""
            matches_per_date_interval = 10  # This is an assumption
            seconds_per_day = (60 * 60 * 24)
            riot_date_interval_in_days = riot_date_interval.total_seconds() / seconds_per_day  # in units of days
            npulls_by_date = (end_time - begin_time).total_seconds() / seconds_per_day / riot_date_interval_in_days
            npulls_by_index = (arrow.now() - begin_time).total_seconds() / seconds_per_day / riot_date_interval_in_days * matches_per_date_interval / riot_index_interval
            if math.ceil(npulls_by_date) < math.ceil(npulls_by_index):
                by = "by_date"
            else:
                by = "by_index"
            return by

        calling_method = determine_calling_method(begin_time, end_time)

        if calling_method == "by_date":
            params["beginTime"] = begin_time.timestamp * 1000
            if "endTime" in query:
                params["endTime"] = min((begin_time + riot_date_interval).timestamp * 1000, query["endTime"])
            else:
                params["endTime"] = (begin_time + riot_date_interval).timestamp * 1000
        else:
            params["beginIndex"] = query["beginIndex"]
            params["endIndex"] = query["beginIndex"] + min(riot_index_interval, query["maxNumberOfMatches"])
            params["endIndex"] = int(params["endIndex"])

        if "seasons" in query:
            seasons = {Season(season) for season in query["seasons"]}
            params["season"] = {SEASON_IDS[season] for season in seasons}
        else:
            seasons = set()

        if "champion.ids" in query:
            champions = query["champion.ids"]
            params["champion"] = champions
        else:
            champions = set()

        if "queues" in query:
            queues = {Queue(queue) for queue in query["queues"]}
            params["queue"] = {QUEUE_IDS[queue] for queue in queues}
        else:
            queues = set()

        url = "https://{platform}.api.riotgames.com/lol/match/v3/matchlists/by-account/{accountId}".format(platform=query["platform"].value.lower(), accountId=query["account.id"])
        try:
            data = self._get(url, params, self._get_rate_limiter(query["platform"], "matchlists/by-account/accountId"))
        except APINotFoundError:
            data = {"matches": []}

        data["accountId"] = query["account.id"]
        data["region"] = query["platform"].region.value
        data["season"] = seasons
        data["champion"] = champions
        data["queue"] = queues
        if calling_method == "by_index":
            data["beginIndex"] = params["beginIndex"]
            data["endIndex"] = params["endIndex"]
            data["maxNumberOfMatches"] = query["maxNumberOfMatches"]
        else:
            data["beginTime"] = params["beginTime"]
            data["endTime"] = params["endTime"]
        for match in data["matches"]:
            match["accountId"] = query["account.id"]
            match["region"] = Platform(match["platformId"]).region.value
        return MatchListDto(data)

    _validate_get_many_match_list_query = Query. \
        has("account.ids").as_(Iterable).also. \
        has("platform").as_(Platform).also. \
        can_have("recent").with_default(False).also. \
        can_have("beginTime").as_(int).also. \
        can_have("endTime").as_(int).also. \
        can_have("beginIndex").as_(int).also. \
        can_have("endIndex").as_(int).also. \
        can_have("seasons").as_(Iterable).also. \
        can_have("champion.ids").as_(Iterable).also. \
        can_have("queues").as_(Iterable)

    @get_many.register(MatchListDto)
    @validate_query(_validate_get_many_match_list_query, convert_region_to_platform)
    def get_many_match_list(self, query: MutableMapping[str, Any], context: PipelineContext = None) -> Generator[MatchListDto, None, None]:
        if query["recent"]:
            def generator():
                for id in query["account.ids"]:
                    url = "https://{platform}.api.riotgames.com/lol/match/v3/matchlists/by-account/{accountId}/recent".format(platform=query["platform"].value.lower(), accountId=id)
                    try:
                        data = self._get(url, {}, self._get_rate_limiter(query["platform"], "matchlists/by-account/accountId/recent"))
                    except APINotFoundError as error:
                        raise NotFoundError(str(error)) from error

                    data["account.id"] = id
                    data["region"] = query["platform"].region.value
                    yield MatchListDto(data)
        else:
            params = {}

            if "beginIndex" in query:
                params["beginIndex"] = query["beginIndex"]

            if "endIndex" in query:
                params["endIndex"] = query["endIndex"]

            if "seasons" in query:
                seasons = {Season(season) for season in query["seasons"]}
                params["season"] = {SEASON_IDS[season] for season in seasons}
            else:
                seasons = set()

            if "champion.ids" in query:
                params["champion"] = {query["champion.ids"]}

            if "queues" in query:
                queues = {Queue(queue) for queue in query["queues"]}
                params["queue"] = {QUEUE_IDS[queue] for queue in queues}
            else:
                queues = set()

            def generator():
                for id in query["account.ids"]:
                    url = "https://{platform}.api.riotgames.com/lol/match/v3/matchlists/by-account/{accountId}".format(platform=query["platform"].value.lower(), accountId=id)
                    try:
                        data = self._get(url, params, self._get_rate_limiter(query["platform"], "matchlists/by-account/accountId"))
                    except APINotFoundError as error:
                        raise NotFoundError(str(error)) from error

                    data["account.id"] = id
                    data["region"] = query["platform"].region.value
                    if "beginIndex" in query:
                        data["beginIndex"] = query["beginIndex"]
                    if "endIndex" in query:
                        data["endIndex"] = query["endIndex"]
                    if "seasons" in query:
                        data["seasons"] = seasons
                    if "champion.ids" in query:
                        data["champion"] = params["champion"]
                    if "queues" in query:
                        params["queue"] = queues
                    yield MatchListDto(data)

        return generator()

    _validate_get_timeline_query = Query. \
        has("id").as_(int).also. \
        has("platform").as_(Platform)

    @get.register(TimelineDto)
    @validate_query(_validate_get_timeline_query, convert_region_to_platform)
    def get_match_timeline(self, query: MutableMapping[str, Any], context: PipelineContext = None) -> TimelineDto:
        url = "https://{platform}.api.riotgames.com/lol/match/v3/timelines/by-match/{id}".format(platform=query["platform"].value.lower(), id=query["id"])
        try:
            data = self._get(url, {}, self._get_rate_limiter(query["platform"], "timelines/by-match/id"))
        except APINotFoundError as error:
            raise NotFoundError(str(error)) from error

        data["matchId"] = query["id"]
        data["region"] = query["platform"].region.value
        return TimelineDto(data)

    _validate_get_many_timeline_query = Query. \
        has("ids").as_(Iterable).also. \
        has("platform").as_(Platform)

    @get_many.register(TimelineDto)
    @validate_query(_validate_get_many_timeline_query, convert_region_to_platform)
    def get_many_match_timeline(self, query: MutableMapping[str, Any], context: PipelineContext = None) -> Generator[TimelineDto, None, None]:
        def generator():
            for id in query["ids"]:
                url = "https://{platform}.api.riotgames.com/lol/match/v3/timelines/by-match/{id}".format(platform=query["platform"].value.lower(), id=id)
                try:
                    data = self._get(url, {}, self._get_rate_limiter(query["platform"], "timelines/by-match/id"))
                except APINotFoundError as error:
                    raise NotFoundError(str(error)) from error

                data["matchId"] = id
                data["region"] = query["platform"].region.value
                yield TimelineDto(data)

        return generator()
