import os
import unittest
from unittest.mock import patch

from app.features.memoir.memoir_images.settings import (
    DEFAULT_LIBLIB_TEMPLATE_UUID,
    MemoirImageSettings,
)


class MemoirImageSettingsTest(unittest.TestCase):
    @patch.dict(
        os.environ,
        {
            "MEMOIR_IMAGE_MAX_PER_CHAPTER": "not-an-int",
            "MEMOIR_IMAGE_CHARS_PER_EXTRA": "bad-extra",
            "MEMOIR_IMAGE_MAX_CAP": "bad-cap",
            "MEMOIR_IMAGE_POLL_INTERVAL": "bad",
            "MEMOIR_IMAGE_MAX_ATTEMPTS": "oops",
        },
        clear=False,
    )
    def test_from_env_falls_back_to_defaults_for_invalid_integers(self):
        settings = MemoirImageSettings.from_env()

        self.assertEqual(settings.max_per_chapter, 2)
        self.assertEqual(settings.chars_per_extra_image, 1500)
        self.assertEqual(settings.max_images_cap, 8)
        self.assertEqual(settings.poll_interval_seconds, 3)
        self.assertEqual(settings.max_attempts, 60)

    @patch.dict(os.environ, {}, clear=False)
    def test_from_env_uses_shared_template_uuid_default(self):
        with patch.dict(os.environ, {"LIBLIB_TEMPLATE_UUID": ""}, clear=False):
            settings = MemoirImageSettings.from_env()

        self.assertEqual(settings.liblib_template_uuid, DEFAULT_LIBLIB_TEMPLATE_UUID)

    def test_effective_max_images_never_drops_below_base_max_per_chapter(self):
        settings = MemoirImageSettings(enabled=True, max_per_chapter=2, max_images_cap=1)

        self.assertEqual(settings.effective_max_images(0), 2)