"""Auth endpoint tests."""
from __future__ import annotations

from datetime import UTC, datetime, timedelta

import jwt
from flask import Flask
from flask.testing import FlaskClient

from backend.app.models import User


def test_login_success(client: FlaskClient, admin_user: User) -> None:
    resp = client.post(
        "/api/auth/login", json={"username": "admin1", "password": "adminpass1"}
    )
    assert resp.status_code == 200
    body = resp.get_json()
    assert "access_token" in body and body["access_token"]
    assert body["user"] == {"id": admin_user.id, "username": "admin1", "role": "admin"}


def test_login_wrong_password(client: FlaskClient, admin_user: User) -> None:
    resp = client.post(
        "/api/auth/login", json={"username": "admin1", "password": "wrong"}
    )
    assert resp.status_code == 401
    assert resp.get_json() == {"error": "Invalid credentials"}


def test_login_unknown_user(client: FlaskClient) -> None:
    resp = client.post(
        "/api/auth/login", json={"username": "ghost", "password": "anything!!"}
    )
    assert resp.status_code == 401
    # Generic message — must not leak whether username exists.
    assert resp.get_json() == {"error": "Invalid credentials"}


def test_login_missing_fields(client: FlaskClient) -> None:
    resp = client.post("/api/auth/login", json={})
    assert resp.status_code == 401


def test_me_requires_token(client: FlaskClient) -> None:
    resp = client.get("/api/auth/me")
    assert resp.status_code == 401


def test_me_returns_current_user(
    client: FlaskClient, admin_user: User, admin_token: str
) -> None:
    resp = client.get("/api/auth/me", headers={"Authorization": f"Bearer {admin_token}"})
    assert resp.status_code == 200
    body = resp.get_json()
    assert body["username"] == "admin1"
    assert body["role"] == "admin"
    assert "password_hash" not in body


def test_me_with_invalid_token(client: FlaskClient) -> None:
    resp = client.get("/api/auth/me", headers={"Authorization": "Bearer not.a.jwt"})
    assert resp.status_code == 401


def test_me_with_expired_token(
    app: Flask, client: FlaskClient, admin_user: User
) -> None:
    now = datetime.now(UTC) - timedelta(minutes=120)
    payload = {
        "sub": str(admin_user.id),
        "role": "admin",
        "iat": int(now.timestamp()),
        "exp": int((now + timedelta(minutes=1)).timestamp()),
    }
    token = jwt.encode(
        payload, app.config["JWT_SECRET"], algorithm=app.config["JWT_ALGORITHM"]
    )
    resp = client.get("/api/auth/me", headers={"Authorization": f"Bearer {token}"})
    assert resp.status_code == 401
    assert resp.get_json() == {"error": "Token expired"}


def test_logout_ok_with_token(client: FlaskClient, admin_token: str) -> None:
    resp = client.post(
        "/api/auth/logout", headers={"Authorization": f"Bearer {admin_token}"}
    )
    assert resp.status_code == 200


def test_logout_without_token_is_401(client: FlaskClient) -> None:
    resp = client.post("/api/auth/logout")
    assert resp.status_code == 401
