import os
from unittest import TestCase
from unittest import mock

from paperless.settings import _parse_paperless_url
from paperless.settings import default_threads_per_worker


class TestThreadCalculation(TestCase):
    def test_workers_threads(self) -> None:
        """
        GIVEN:
            - Certain CPU counts
        WHEN:
            - Threads per worker is calculated
        THEN:
            - Threads per worker less than or equal to CPU count
            - At least 1 thread per worker
        """
        default_workers = 1

        for i in range(1, 64):
            with mock.patch(
                "paperless.settings.multiprocessing.cpu_count",
            ) as cpu_count:
                cpu_count.return_value = i

                default_threads = default_threads_per_worker(default_workers)

                self.assertGreaterEqual(default_threads, 1)

                self.assertLessEqual(default_workers * default_threads, i)


class TestPaperlessURLSettings(TestCase):
    def test_paperless_url(self) -> None:
        """
        GIVEN:
            - PAPERLESS_URL is set
        WHEN:
            - The URL is parsed
        THEN:
            - The URL is returned and present in related settings
        """
        with mock.patch.dict(
            os.environ,
            {
                "PAPERLESS_URL": "https://example.com",
            },
        ):
            url = _parse_paperless_url()
            self.assertEqual("https://example.com", url)
            from django.conf import settings

            self.assertIn(url, settings.CSRF_TRUSTED_ORIGINS)
            self.assertIn(url, settings.CORS_ALLOWED_ORIGINS)