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 as get_forms_manifest
from govoplan_forms_runtime.backend.manifest import get_manifest as get_runtime_manifest


class FormsRuntimeMigrationTests(unittest.TestCase):
    def test_fresh_migration_creates_runtime_store_and_head(self) -> None:
        with tempfile.TemporaryDirectory(
            prefix="govoplan-forms-runtime-migration-"
        ) as directory:
            url = f"sqlite:///{Path(directory) / 'forms-runtime.db'}"
            migrate_database(
                database_url=url,
                enabled_modules=("forms", "forms_runtime"),
                manifest_factories=(get_forms_manifest, get_runtime_manifest),
            )
            engine = create_engine(url)
            try:
                self.assertTrue(
                    {
                        "form_definition_revisions",
                        "form_instance_identities",
                        "form_instance_revisions",
                        "form_instance_events",
                        "form_handoff_effects",
                    }.issubset(inspect(engine).get_table_names())
                )
                with engine.connect() as connection:
                    self.assertIn(
                        "a3d5f7b9c1e2",
                        set(MigrationContext.configure(connection).get_current_heads()),
                    )
            finally:
                engine.dispose()


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