from datetime import datetime, timedelta

import pytest
from sqlalchemy.pool import StaticPool
from sqlmodel import Session, SQLModel, create_engine

from src.auth.jwt import create_token_pair, decode_token_unsafe
from src.models.entities import UserDB
import src.services.session_service as session_service_module
from src.services.session_service import SessionService


@pytest.fixture
def engine():
    engine = create_engine(
        "sqlite:///:memory:",
        connect_args={"check_same_thread": False},
        poolclass=StaticPool,
    )
    SQLModel.metadata.create_all(engine)
    return engine


@pytest.fixture
def session_service(engine, monkeypatch):
    monkeypatch.setattr(session_service_module, "engine", engine)
    return SessionService()


@pytest.fixture
def user_id(engine):
    now = datetime.now().timestamp()
    user_id = "user-test"
    user = UserDB(
        id=user_id,
        username="session_user",
        email="session@example.com",
        password_hash="hashed-password",
        is_active=True,
        is_superuser=False,
        permissions=[],
        roles=["user"],
        created_at=now,
        updated_at=now,
    )

    with Session(engine) as session:
        session.add(user)
        session.commit()

    return user_id


def test_create_token_pair_includes_session_claims():
    tokens = create_token_pair(
        user_id="user-1",
        scopes=["user"],
        session_id="session-1",
        session_family_id="family-1",
    )

    access_payload = decode_token_unsafe(tokens.access_token)
    refresh_payload = decode_token_unsafe(tokens.refresh_token)

    assert tokens.session_id == "session-1"
    assert tokens.session_family_id == "family-1"
    assert access_payload["sid"] == "session-1"
    assert refresh_payload["sid"] == "session-1"
    assert refresh_payload["sfid"] == "family-1"


def test_session_service_create_and_validate_refresh_token(session_service, user_id):
    created = session_service.create_session(
        user_id=user_id,
        refresh_token="refresh-token-1",
        session_id="session-1",
        session_family_id="family-1",
    )

    validated = session_service.validate_refresh_token(created.id, "refresh-token-1")

    assert created.id == "session-1"
    assert created.session_family_id == "family-1"
    assert validated is not None
    assert validated.id == created.id
    assert session_service.is_session_active(created.id) is True


def test_rotate_refresh_token_revokes_previous_session(session_service, user_id):
    created = session_service.create_session(
        user_id=user_id,
        refresh_token="refresh-token-1",
        session_id="session-1",
        session_family_id="family-1",
    )

    rotated = session_service.rotate_refresh_token(
        created.id,
        "refresh-token-1",
        "refresh-token-2",
        new_session_id="session-2",
    )

    previous = session_service.get_session(created.id)

    assert rotated is not None
    assert rotated.id == "session-2"
    assert rotated.session_family_id == "family-1"
    assert previous is not None
    assert previous.status == "rotated"
    assert previous.replaced_by_session_id == "session-2"
    assert session_service.validate_refresh_token("session-2", "refresh-token-2") is not None


def test_refresh_token_reuse_revokes_session_family(session_service, user_id):
    created = session_service.create_session(
        user_id=user_id,
        refresh_token="refresh-token-1",
        session_id="session-1",
        session_family_id="family-1",
    )
    rotated = session_service.rotate_refresh_token(
        created.id,
        "refresh-token-1",
        "refresh-token-2",
        new_session_id="session-2",
    )

    invalidated = session_service.validate_refresh_token("session-2", "wrong-refresh-token")
    active_sessions = session_service.list_user_sessions(user_id, include_inactive=True)

    assert rotated is not None
    assert invalidated is None
    assert all(session.status in {"rotated", "revoked"} for session in active_sessions)
    assert any(session.id == "session-2" and session.status == "revoked" for session in active_sessions)


def test_expired_session_is_not_active(session_service, user_id):
    expired_session = session_service.create_session(
        user_id=user_id,
        refresh_token="refresh-token-expired",
        session_id="session-expired",
        expires_at=(datetime.now() - timedelta(minutes=1)).timestamp(),
    )

    validated = session_service.validate_refresh_token(expired_session.id, "refresh-token-expired")
    expired = session_service.get_session(expired_session.id)

    assert validated is None
    assert expired is not None
    assert expired.status == "revoked"
    assert expired.revoked_reason == "expired"