from rest_framework import generics
from rest_framework.pagination import PageNumberPagination
from rest_framework.throttling import AnonRateThrottle, UserRateThrottle

from apps.competitions.models import Competition, Season
from apps.players.forms import PlayerSearchForm
from apps.players.models import Player
from apps.players.services.search import apply_sorting, base_player_queryset, filter_players
from apps.teams.models import Team

from .permissions import ReadOnlyOrDeny
from .serializers import (
    CompetitionSerializer,
    PlayerDetailSerializer,
    PlayerListSerializer,
    SeasonSerializer,
    TeamSerializer,
)


class ApiPagination(PageNumberPagination):
    page_size = 20
    page_size_query_param = "page_size"
    max_page_size = 100


class ReadOnlyBaseAPIView:
    permission_classes = [ReadOnlyOrDeny]
    throttle_classes = [AnonRateThrottle, UserRateThrottle]


class PlayerSearchApiView(ReadOnlyBaseAPIView, generics.ListAPIView):
    serializer_class = PlayerListSerializer
    pagination_class = ApiPagination

    def get_queryset(self):
        form = PlayerSearchForm(self.request.query_params or None)
        queryset = base_player_queryset()
        if form.is_valid():
            queryset = filter_players(queryset, form.cleaned_data)
            queryset = apply_sorting(queryset, form.cleaned_data.get("sort", "name_asc"))
        else:
            queryset = queryset.order_by("full_name", "id")
        return queryset


class PlayerDetailApiView(ReadOnlyBaseAPIView, generics.RetrieveAPIView):
    serializer_class = PlayerDetailSerializer
    queryset = Player.objects.select_related(
        "nationality",
        "nominal_position",
        "inferred_role",
    ).prefetch_related("aliases")


class CompetitionListApiView(ReadOnlyBaseAPIView, generics.ListAPIView):
    serializer_class = CompetitionSerializer
    queryset = Competition.objects.select_related("country").order_by("name")


class TeamListApiView(ReadOnlyBaseAPIView, generics.ListAPIView):
    serializer_class = TeamSerializer
    queryset = Team.objects.select_related("country").order_by("name")


class SeasonListApiView(ReadOnlyBaseAPIView, generics.ListAPIView):
    serializer_class = SeasonSerializer
    queryset = Season.objects.order_by("-start_date")