"""Tests for authentication endpoints."""

import uuid
from datetime import datetime, timedelta, timezone

import jwt
import pytest

from app.config import settings


def _make_token(username: str, *, expired_seconds_ago: int | None = None) -> str:
    """Build a raw JWT mirroring ``create_access_token`` with a controllable exp."""
    if expired_seconds_ago is None:
        expire = datetime.now(timezone.utc) + timedelta(minutes=30)
    else:
        expire = datetime.now(timezone.utc) - timedelta(seconds=expired_seconds_ago)
    payload = {"sub": username, "exp": expire, "jti": str(uuid.uuid4())}
    return jwt.encode(payload, settings.SECRET_KEY, algorithm=settings.ALGORITHM)


def test_login_success(client, admin_user):
    """Test successful login returns a token."""
    response = client.post(
        "/api/v1/auth/login",
        data={"username": "admin", "password": "admin123"},
    )
    assert response.status_code == 200
    data = response.json()
    assert "access_token" in data
    assert data["token_type"] == "bearer"


def test_login_wrong_password(client, admin_user):
    """Test login with wrong password returns 400."""
    response = client.post(
        "/api/v1/auth/login",
        data={"username": "admin", "password": "wrongpassword"},
    )
    assert response.status_code == 400


def test_login_nonexistent_user(client):
    """Test login with non-existent user returns 400."""
    response = client.post(
        "/api/v1/auth/login",
        data={"username": "nobody", "password": "password"},
    )
    assert response.status_code == 400


def test_login_inactive_user(client, db):
    """Test login with inactive user returns 400."""
    from app.auth import hash_password
    from app.models.user import User

    user = User(
        username="inactive",
        hashed_password=hash_password("password"),
        role="viewer",
        is_active=False,
    )
    db.add(user)
    db.commit()

    response = client.post(
        "/api/v1/auth/login",
        data={"username": "inactive", "password": "password"},
    )
    assert response.status_code == 403


def test_get_me_with_token(client, admin_user, admin_token):
    """Test /auth/me returns current user with valid token."""
    response = client.get(
        "/api/v1/auth/me",
        headers={"Authorization": f"Bearer {admin_token}"},
    )
    assert response.status_code == 200
    data = response.json()
    assert data["username"] == "admin"
    assert data["role"] == "admin"


def test_get_me_without_token(client):
    """Test /auth/me returns 401 without token."""
    response = client.get("/api/v1/auth/me")
    assert response.status_code == 401


def test_get_me_invalid_token(client):
    """Test /auth/me returns 401 with invalid token."""
    response = client.get(
        "/api/v1/auth/me",
        headers={"Authorization": "Bearer invalidtoken"},
    )
    assert response.status_code == 401


def test_logout_revokes_token(client, admin_user):
    """After logout, the same JWT must be rejected (Redis blacklist).

    Prefer Authorization over the HttpOnly cookie so logout blacklists the
    same token the client sends on the next request; clear cookies to avoid
    stale jar state across calls.
    """
    login = client.post(
        "/api/v1/auth/login",
        data={"username": "admin", "password": "admin123"},
    )
    assert login.status_code == 200
    token = login.json()["access_token"]

    client.cookies.clear()
    out = client.post(
        "/api/v1/auth/logout",
        headers={"Authorization": f"Bearer {token}"},
    )
    assert out.status_code == 200

    import jwt

    from app.config import settings
    from app.infrastructure.redis_client import get_redis_blacklist

    payload = jwt.decode(
        token, settings.SECRET_KEY, algorithms=[settings.ALGORITHM],
    )
    jti = payload.get("jti")
    assert jti
    assert get_redis_blacklist().exists(f"blacklist:{jti}")

    client.cookies.clear()
    assert not len(client.cookies), "cookie jar must be empty to force Authorization Bearer"
    me = client.get(
        "/api/v1/auth/me",
        headers={"Authorization": f"Bearer {token}"},
    )
    assert me.status_code == 401
    assert me.json()["detail"] == "Token has been revoked"


def test_refresh_without_cookie_fails(client):
    response = client.post("/api/v1/auth/refresh")
    assert response.status_code == 403


def test_refresh_valid_token_succeeds(client, admin_user):
    token = _make_token("admin")
    client.cookies.set("aegis_token", token)
    response = client.post("/api/v1/auth/refresh")
    assert response.status_code == 200
    assert "access_token" in response.json()


def test_refresh_recently_expired_token_succeeds_within_grace(client, admin_user):
    """A token that expired moments ago must still be refreshable.

    This is the core of the refresh-token bug fix: without a grace window,
    `/auth/refresh` decodes with the same strict expiry check as every
    other endpoint, so a 401-triggered refresh attempt always also fails.
    """
    token = _make_token("admin", expired_seconds_ago=60)
    client.cookies.set("aegis_token", token)
    response = client.post("/api/v1/auth/refresh")
    assert response.status_code == 200
    assert "access_token" in response.json()


def test_refresh_long_expired_token_fails(client, admin_user):
    token = _make_token("admin", expired_seconds_ago=60 * 60)
    client.cookies.set("aegis_token", token)
    response = client.post("/api/v1/auth/refresh")
    assert response.status_code == 403


def test_refresh_blacklisted_token_fails_even_if_not_expired(client, admin_user):
    from app.auth import blacklist_token

    token = _make_token("admin")
    payload = jwt.decode(token, settings.SECRET_KEY, algorithms=[settings.ALGORITHM])
    blacklist_token(payload["jti"], float(payload["exp"]))

    client.cookies.set("aegis_token", token)
    response = client.post("/api/v1/auth/refresh")
    assert response.status_code == 403
