import base64
import os
from pathlib import Path
from typing import Generator

from fastapi.testclient import TestClient
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker

os.environ.setdefault("WEB_SENTINEL_POSTGRES_URL", "sqlite:///./test_admin_logs.db")
os.environ.setdefault("WEB_SENTINEL_ADMIN_JWT_SECRET", "test-secret")

from admin.backend.app.database import get_session
from admin.backend.app.main import create_app
from admin.backend.app.models import Base
from admin.backend.app.models.admin_user import AdminUser
from admin.backend.app.security import hash_password

engine = create_engine(os.environ["WEB_SENTINEL_POSTGRES_URL"], future=True)
TestingSession = sessionmaker(bind=engine, autoflush=False, autocommit=False, future=True)

Base.metadata.create_all(bind=engine)


def override_session() -> Generator:
    db = TestingSession()
    try:
        yield db
    finally:
        db.close()


app = create_app()
app.dependency_overrides[get_session] = override_session
client = TestClient(app)


def setup_module() -> None:
    Base.metadata.create_all(bind=engine)
    with TestingSession() as session:
        session.query(AdminUser).delete()
        session.add(
            AdminUser(
                email="sysop@web-sentinel.com",
                hashed_password=hash_password("secret"),
                role="super-admin",
            )
        )
        session.commit()


def teardown_module() -> None:
    Base.metadata.drop_all(bind=engine)


def _login() -> str:
    response = client.post(
        "/api/v1/auth/login",
        data={"username": "sysop@web-sentinel.com", "password": "secret"},
        headers={"Content-Type": "application/x-www-form-urlencoded"},
    )
    assert response.status_code == 200
    return response.json()["access_token"]


def test_logs_endpoint():
    token = _login()
    response = client.get(
        "/api/v1/logs/",
        headers={"Authorization": f"Bearer {token}"},
    )
    assert response.status_code == 200
    assert isinstance(response.json(), list)


def test_logs_download_endpoint():
    token = _login()

    log_path = Path("server.log")
    original = None
    if log_path.exists():
        original = log_path.read_bytes()
    log_path.write_text("[INFO] Example log entry\n")

    try:
        response = client.get(
            "/api/v1/logs/download",
            headers={"Authorization": f"Bearer {token}"},
        )
        assert response.status_code == 200
        payload = response.json()
        content = base64.b64decode(payload["content_base64"])
        assert content.startswith(b"PK")
    finally:
        if original is not None:
            log_path.write_bytes(original)
        else:
            log_path.unlink(missing_ok=True)