"""Test api token."""

import random
import uuid
from datetime import datetime

import pytest

from grass.logic import api_token


def random_id():
    """Create a random id.

    Returns:
        int: the random id.
    """
    return int(1000 + 4000 * random.random())


@pytest.fixture
def random_token():
    """Create a random token.

    Returns:
        Response: the token information.
    """
    user_id = random_id()
    client_id = str(random_id())
    oauth_token = str(uuid.uuid4())
    response = api_token._create_token(
        token=oauth_token,
        client_id=client_id,
        user_id=user_id,
        user_type='oa',
        expires=int(datetime.utcnow().timestamp()),
    )
    return response


def test_creation_of_a_random_token(random_token):
    """Test the creation of a random token.

    The random token is generated by using the fixture. If no exceptions are
    raised, it means that the system has worked as expected.
    """
    pass


def test_token_validation(random_token):
    """Test validate token."""
    assert api_token.is_token_valid(
        random_token.oauth_token, random_token.client_id, random_token.user_id
    )


def test_non_existent_token_validation(random_token):
    """Test validating a missing token."""
    # Fake client id.
    assert not api_token.is_token_valid(
        random_token.oauth_token, 20, random_token.user_id
    )

    # Fake user id.
    assert not api_token.is_token_valid(
        random_token.oauth_token, random_token.client_id, 20
    )

    # Fake token id.
    assert not api_token.is_token_valid(
        20, random_token.client_id, random_token.user_id
    )


def test_exception_raised_on_missing_value():
    """Test an exception is raised when a param value is missing."""
    # If any of the value is missing – an exception is expected.
    for a in [None, True]:
        for b in [None, True]:
            for c in [None, True]:
                if a and b and c:
                    continue

                assert pytest.raises(Exception, api_token.is_token_valid, a, b, c)