from __future__ import annotations

import time
from typing import Any

import pytest
import requests

from apps.providers.adapters.balldontlie_provider import BalldontlieProviderAdapter
from apps.providers.adapters.mvp_provider import MvpDemoProviderAdapter
from apps.providers.clients.balldontlie import BalldontlieClient
from apps.providers.exceptions import ProviderRateLimitError, ProviderTransientError
from apps.providers.registry import get_default_provider_namespace, get_provider


class _FakeResponse:
    def __init__(self, *, status_code: int, payload: dict[str, Any] | None = None, headers: dict[str, str] | None = None, text: str = ""):
        self.status_code = status_code
        self._payload = payload or {}
        self.headers = headers or {}
        self.text = text

    def json(self):
        return self._payload


class _FakeSession:
    def __init__(self, responses: list[Any]):
        self._responses = responses

    def get(self, *args, **kwargs):
        item = self._responses.pop(0)
        if isinstance(item, Exception):
            raise item
        return item


class _FakeBalldontlieClient:
    def get_json(self, path: str, *, params: dict[str, Any] | None = None) -> dict[str, Any]:
        if path == "teams":
            return {
                "data": [
                    {
                        "id": 14,
                        "full_name": "Los Angeles Lakers",
                        "abbreviation": "LAL",
                    }
                ]
            }
        return {"data": []}

    def list_paginated(
        self,
        path: str,
        *,
        params: dict[str, Any] | None = None,
        per_page: int = 100,
        page_limit: int = 1,
    ) -> list[dict[str, Any]]:
        if path == "players":
            return [
                {
                    "id": 237,
                    "first_name": "LeBron",
                    "last_name": "James",
                    "position": "F",
                    "team": {"id": 14},
                }
            ]
        if path == "stats":
            return [
                {
                    "pts": 20,
                    "reb": 8,
                    "ast": 7,
                    "stl": 1,
                    "blk": 1,
                    "turnover": 3,
                    "fg_pct": 0.5,
                    "fg3_pct": 0.4,
                    "ft_pct": 0.9,
                    "min": "35:12",
                    "player": {"id": 237},
                    "team": {"id": 14},
                    "game": {"season": 2024},
                },
                {
                    "pts": 30,
                    "reb": 10,
                    "ast": 9,
                    "stl": 2,
                    "blk": 0,
                    "turnover": 4,
                    "fg_pct": 0.6,
                    "fg3_pct": 0.5,
                    "ft_pct": 1.0,
                    "min": "33:00",
                    "player": {"id": 237},
                    "team": {"id": 14},
                    "game": {"season": 2024},
                },
            ]
        return []


@pytest.mark.django_db
def test_provider_registry_backend_selection(settings):
    settings.PROVIDER_DEFAULT_NAMESPACE = ""
    settings.PROVIDER_BACKEND = "demo"
    assert get_default_provider_namespace() == "mvp_demo"
    assert isinstance(get_provider(), MvpDemoProviderAdapter)

    settings.PROVIDER_BACKEND = "balldontlie"
    assert get_default_provider_namespace() == "balldontlie"
    assert isinstance(get_provider(), BalldontlieProviderAdapter)

    settings.PROVIDER_DEFAULT_NAMESPACE = "mvp_demo"
    assert get_default_provider_namespace() == "mvp_demo"


@pytest.mark.django_db
def test_balldontlie_adapter_maps_payloads(settings):
    settings.PROVIDER_BALLDONTLIE_SEASONS = [2024]
    adapter = BalldontlieProviderAdapter(client=_FakeBalldontlieClient())

    payload = adapter.sync_all()

    assert payload["competitions"][0]["external_id"] == "competition-nba"
    assert payload["teams"][0]["external_id"] == "team-14"
    assert payload["players"][0]["external_id"] == "player-237"
    assert payload["seasons"][0]["external_id"] == "season-2024"
    assert payload["player_stats"][0]["games_played"] == 2
    assert payload["player_stats"][0]["points"] == 25.0
    assert payload["player_stats"][0]["fg_pct"] == 55.0


@pytest.mark.django_db
def test_balldontlie_client_retries_after_rate_limit(monkeypatch, settings):
    monkeypatch.setattr(time, "sleep", lambda _: None)
    settings.PROVIDER_REQUEST_RETRIES = 2
    settings.PROVIDER_REQUEST_RETRY_SLEEP = 0

    session = _FakeSession(
        responses=[
            _FakeResponse(status_code=429, headers={"Retry-After": "0"}),
            _FakeResponse(status_code=200, payload={"data": []}),
        ]
    )
    client = BalldontlieClient(session=session)

    payload = client.get_json("players")
    assert payload == {"data": []}


@pytest.mark.django_db
def test_balldontlie_client_timeout_retries_then_fails(monkeypatch, settings):
    monkeypatch.setattr(time, "sleep", lambda _: None)
    settings.PROVIDER_REQUEST_RETRIES = 2
    settings.PROVIDER_REQUEST_RETRY_SLEEP = 0

    session = _FakeSession(responses=[requests.Timeout("slow"), requests.Timeout("slow")])
    client = BalldontlieClient(session=session)

    with pytest.raises(ProviderTransientError):
        client.get_json("players")


@pytest.mark.django_db
def test_balldontlie_client_raises_rate_limit_after_max_retries(monkeypatch, settings):
    monkeypatch.setattr(time, "sleep", lambda _: None)
    settings.PROVIDER_REQUEST_RETRIES = 2
    settings.PROVIDER_REQUEST_RETRY_SLEEP = 0

    session = _FakeSession(
        responses=[
            _FakeResponse(status_code=429, headers={"Retry-After": "1"}),
            _FakeResponse(status_code=429, headers={"Retry-After": "1"}),
        ]
    )
    client = BalldontlieClient(session=session)

    with pytest.raises(ProviderRateLimitError):
        client.get_json("players")