from __future__ import annotations

from io import StringIO
from unittest.mock import patch

from django.test import SimpleTestCase

from pobsync.cli import main


class ConsoleEntrypointTests(SimpleTestCase):
    def test_version_prints_package_version(self) -> None:
        stdout = StringIO()
        with patch("sys.stdout", stdout):
            exit_code = main(["--version"])

        self.assertEqual(exit_code, 0)
        self.assertEqual(stdout.getvalue().strip(), "pobsync 1.0.0")

    def test_maps_backup_alias_to_django_command(self) -> None:
        with patch("pobsync.cli.execute_from_command_line") as execute:
            exit_code = main(["backup", "web-01", "--dry-run"])

        self.assertEqual(exit_code, 0)
        execute.assert_called_once_with(["pobsync", "run_pobsync_backup", "web-01", "--dry-run"])

    def test_unknown_command_returns_usage_error(self) -> None:
        stderr = StringIO()
        with patch("sys.stderr", stderr):
            exit_code = main(["run-scheduled", "web-01"])

        self.assertEqual(exit_code, 2)
        self.assertIn("Unknown pobsync command", stderr.getvalue())

    def test_django_passthrough_keeps_management_command_name(self) -> None:
        with patch("pobsync.cli.execute_from_command_line") as execute:
            exit_code = main(["django", "check"])

        self.assertEqual(exit_code, 0)
        execute.assert_called_once_with(["pobsync", "check"])

    def test_maps_discover_snapshots_alias_to_django_command(self) -> None:
        with patch("pobsync.cli.execute_from_command_line") as execute:
            exit_code = main(["discover-snapshots", "--host", "web-01"])

        self.assertEqual(exit_code, 0)
        execute.assert_called_once_with(["pobsync", "discover_pobsync_snapshots", "--host", "web-01"])

    def test_maps_worker_alias_to_django_command(self) -> None:
        with patch("pobsync.cli.execute_from_command_line") as execute:
            exit_code = main(["worker", "--once"])

        self.assertEqual(exit_code, 0)
        execute.assert_called_once_with(["pobsync", "run_pobsync_worker", "--once"])

    def test_configuration_aliases_are_not_public_commands(self) -> None:
        stderr = StringIO()
        with patch("sys.stderr", stderr):
            exit_code = main(["schedule", "web-01", "--cron", "15 2 * * *"])

        self.assertEqual(exit_code, 2)
        self.assertIn("Unknown pobsync command", stderr.getvalue())
        self.assertIn("pobsync django <management-command>", stderr.getvalue())