from pathlib import Path
import unittest


PROJECT_ROOT = Path(__file__).resolve().parents[1]
UP_PATH = PROJECT_ROOT / "database" / "012_monthly_report_publication.sql"
DOWN_PATH = PROJECT_ROOT / "database" / "012_monthly_report_publication.down.sql"


class MonthlyPublicationMigrationTests(unittest.TestCase):
    def test_forward_migration_is_additive_metadata_only(self) -> None:
        sql = UP_PATH.read_text(encoding="utf-8")

        for required in (
            "current_database() <> 'booking_test'",
            "CREATE SCHEMA reporting",
            "CREATE TABLE reporting.monthly_runs",
            "CREATE TABLE reporting.monthly_run_daily_versions",
            "CREATE TABLE reporting.monthly_channel_manifest",
            "monthly_runs_one_active_period_idx",
            "source_snapshot_sha256",
            "storage_provider IN ('oss', 's3', 'local_fixture', 'local')",
            "published monthly run requires a continuous reconciled channel manifest",
            "Greatest ARRIVAL included in this publication",
        ):
            with self.subTest(required=required):
                self.assertIn(required, sql)

        self.assertNotIn("DROP SCHEMA finance", sql)
        self.assertNotIn("DROP SCHEMA ingestion", sql)
        self.assertNotIn("CREATE TABLE finance.report_versions", sql)
        self.assertNotIn("full_name", sql.lower())
        self.assertNotIn("confirmation_no", sql.lower())

    def test_rollback_refuses_after_publication_data_exists(self) -> None:
        sql = DOWN_PATH.read_text(encoding="utf-8")

        self.assertIn("current_database() <> 'booking_test'", sql)
        self.assertIn("SELECT 1 FROM reporting.monthly_runs", sql)
        self.assertIn("storage_provider = 'local'", sql)
        self.assertIn(
            "refusing rollback: monthly publication or controlled local artifact data exists",
            sql,
        )
        self.assertIn("DROP SCHEMA reporting CASCADE", sql)


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