from __future__ import annotations

from pathlib import Path
import tempfile
import unittest

from alembic.runtime.migration import MigrationContext
from sqlalchemy import create_engine, inspect

from govoplan_core.db.migrations import migrate_database
from govoplan_forms.backend.manifest import get_manifest


class FormsMigrationTests(unittest.TestCase):
    def test_fresh_migration_creates_definition_store_and_head(self) -> None:
        with tempfile.TemporaryDirectory(prefix="govoplan-forms-migration-") as directory:
            url = f"sqlite:///{Path(directory) / 'forms.db'}"
            migrate_database(
                database_url=url,
                enabled_modules=("forms",),
                manifest_factories=(get_manifest,),
            )
            engine = create_engine(url)
            try:
                self.assertIn(
                    "form_definition_revisions",
                    inspect(engine).get_table_names(),
                )
                with engine.connect() as connection:
                    self.assertIn(
                        "e1f2a3b4c5d6",
                        set(MigrationContext.configure(connection).get_current_heads()),
                    )
            finally:
                engine.dispose()


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