import datetime

import freezegun
from faker import Faker
from fansifter_common.utils import timezone

from email_campaigns.emails import tokens
from email_campaigns.emails.enums import TokenDecryptionStatus

from tests.unit.helpers import override_settings


class TestTokens:
    def test_encrypt_and_decrypt_campaign_id(self, faker: Faker) -> None:
        campaign_id = faker.uuid4()

        token = tokens.encrypt_email_id(campaign_id)
        result = tokens.decrypt_token(token)

        assert result.status == TokenDecryptionStatus.VALID
        assert result.email_id == campaign_id

    def test_decrypt_invalid_token(self) -> None:
        result = tokens.decrypt_token("invalid_token")

        assert result.status == TokenDecryptionStatus.INVALID
        assert result.email_id is None

    @freezegun.freeze_time("2024-10-15 10:30:00")
    def test_decrypt_expired_token(self, faker: Faker) -> None:
        campaign_id = faker.uuid4()
        ttl_seconds = 60

        with override_settings(email_public_preview_ttl_seconds=ttl_seconds):
            token = tokens.encrypt_email_id(campaign_id)

            with freezegun.freeze_time(
                timezone.now() + datetime.timedelta(seconds=ttl_seconds + 1)
            ):
                result = tokens.decrypt_token(token)

        assert result.status == TokenDecryptionStatus.EXPIRED
        assert result.email_id == campaign_id