from __future__ import annotations

from pathlib import Path
import tempfile
import unittest

from ptlinux.paths import AppPaths
from ptlinux.settings import Settings, load_settings, save_settings


class ChannelSettingsTests(unittest.TestCase):
	def test_existing_users_default_to_stable(self) -> None:
		with tempfile.TemporaryDirectory() as temporary:
			root = Path(temporary)
			paths = AppPaths(root / "data", root / "config", root / "state", root / "cache")
			paths.config.mkdir(parents=True)
			paths.settings_file.write_text('{"realm": "Babel"}\n', encoding="utf-8")

			self.assertEqual(load_settings(paths).update_channel, "stable")

	def test_prerelease_preference_round_trips(self) -> None:
		with tempfile.TemporaryDirectory() as temporary:
			root = Path(temporary)
			paths = AppPaths(root / "data", root / "config", root / "state", root / "cache")

			save_settings(paths, Settings(update_channel="prerelease"))

			self.assertEqual(load_settings(paths).update_channel, "prerelease")

	def test_unknown_channel_is_rejected(self) -> None:
		with tempfile.TemporaryDirectory() as temporary:
			root = Path(temporary)
			paths = AppPaths(root / "data", root / "config", root / "state", root / "cache")
			paths.config.mkdir(parents=True)
			paths.settings_file.write_text('{"update_channel": "nightly"}\n', encoding="utf-8")

			with self.assertRaisesRegex(ValueError, "update channel"):
				load_settings(paths)


if __name__ == "__main__":
	unittest.main()