import datetime as dt
import itertools

import pytest
from fastapi.testclient import TestClient
from sqlmodel import Session, SQLModel, create_engine, select

from app import models  # noqa: F401  (enregistre les tables sur SQLModel.metadata)
from app.auth.deps import get_current_account
from app.auth.rate_limit import login_limiter, magic_link_limiter
from app.config import get_settings
from app.db import get_session
from app.main import app
from app.models import Account, DayPart, Edition, Role


@pytest.fixture(autouse=True)
def _never_use_real_smtp(monkeypatch):
    """Quel que soit le `.env` local, les tests n'ouvrent jamais de connexion
    SMTP : `EMAIL_ENABLED` est forcé à false."""
    monkeypatch.setenv("EMAIL_ENABLED", "false")
    get_settings.cache_clear()
    yield
    get_settings.cache_clear()


@pytest.fixture(autouse=True)
def _reset_rate_limiters():
    """Les limiteurs de `/auth/login` et `/auth/magic-link` sont des
    singletons en mémoire (voir `app/auth/rate_limit.py`) : un test qui en
    déclenche un ne doit pas polluer les suivants."""
    login_limiter.reset()
    magic_link_limiter.reset()
    yield


@pytest.fixture(scope="session")
def engine():
    """Vraie base PostgreSQL de test (voir docker/postgres-init)."""
    eng = create_engine(get_settings().test_database_url, pool_pre_ping=True)
    SQLModel.metadata.drop_all(eng)
    SQLModel.metadata.create_all(eng)
    yield eng
    SQLModel.metadata.drop_all(eng)


@pytest.fixture
def session(engine):
    """Session isolée : chaque test s'exécute dans une transaction annulée
    à la fin, y compris ses `commit()` (savepoints)."""
    connection = engine.connect()
    transaction = connection.begin()
    s = Session(bind=connection, join_transaction_mode="create_savepoint")
    try:
        yield s
    finally:
        s.close()
        transaction.rollback()
        connection.close()


@pytest.fixture
def edition(session) -> Edition:
    """Édition de 4 jours avec 3 demi-journées paramétrées."""
    ed = Edition(
        year=2026,
        name="Festival Test",
        start_date=dt.date(2026, 7, 9),
        end_date=dt.date(2026, 7, 12),
        retention_days=365,
    )
    session.add(ed)
    session.commit()
    session.refresh(ed)
    session.add_all(
        [
            DayPart(
                edition_id=ed.id, code="MORNING", label="Matin",
                start_time=dt.time(6, 0), end_time=dt.time(13, 0), order=0,
            ),
            DayPart(
                edition_id=ed.id, code="AFTERNOON", label="Après-midi",
                start_time=dt.time(13, 0), end_time=dt.time(19, 0), order=1,
            ),
            DayPart(
                edition_id=ed.id, code="EVENING", label="Soirée",
                start_time=dt.time(19, 0), end_time=dt.time(6, 0), order=2,
            ),
        ]
    )
    session.commit()
    return ed


@pytest.fixture
def day_parts(session, edition) -> dict[str, DayPart]:
    parts = session.exec(
        select(DayPart).where(DayPart.edition_id == edition.id)
    )
    return {p.code: p for p in parts}


@pytest.fixture
def make_account(session, edition):
    """Fabrique de comptes rattachés à l'édition de test."""
    counter = itertools.count()

    def _make(
        role: Role,
        *,
        volunteer_id=None,
        email: str | None = None,
        password: str | None = None,
    ) -> Account:
        from app.auth.passwords import hash_password

        account = Account(
            edition_id=edition.id,
            role=role,
            email=email or f"{role.value.lower()}{next(counter)}@test",
            volunteer_id=volunteer_id,
            password_hash=hash_password(password) if password else None,
        )
        session.add(account)
        session.commit()
        session.refresh(account)
        return account

    return _make


@pytest.fixture
def coordinator(make_account) -> Account:
    return make_account(Role.COORDINATOR)


@pytest.fixture
def as_account(session):
    """Fabrique de clients HTTP authentifiés. Fixe l'identité **active** de
    l'app : le dernier appel l'emporte. Pour rejouer un autre rôle après en
    avoir simulé un, rappeler `as_account(...)`."""

    def _make(account: Account) -> TestClient:
        app.dependency_overrides[get_session] = lambda: session
        app.dependency_overrides[get_current_account] = lambda: account
        return TestClient(app)

    yield _make
    app.dependency_overrides.clear()


@pytest.fixture
def client(coordinator, as_account) -> TestClient:
    """Client authentifié en COORDINATION (rôle par défaut des tests)."""
    return as_account(coordinator)


@pytest.fixture
def raw_client(session):
    """Client sans authentification simulée (pour tester le lien magique)."""
    app.dependency_overrides[get_session] = lambda: session
    with TestClient(app) as c:
        yield c
    app.dependency_overrides.clear()


@pytest.fixture
def outbox(monkeypatch) -> list:
    """Capture les emails au lieu de les remettre (SMTP désactivé de toute
    façon en test ; ceci permet de les inspecter)."""
    box: list = []
    monkeypatch.setattr(
        "app.email.sender.deliver_many", lambda messages: box.extend(messages)
    )
    return box