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


class CasesMigrationTests(unittest.TestCase):
    def test_fresh_migration_creates_case_sharing_schema_and_head(self) -> None:
        with tempfile.TemporaryDirectory(prefix="govoplan-cases-migration-") as directory:
            url = f"sqlite:///{Path(directory) / 'cases.db'}"
            migrate_database(
                database_url=url,
                enabled_modules=("cases",),
                manifest_factories=(get_manifest,),
            )
            engine = create_engine(url)
            try:
                inspector = inspect(engine)
                self.assertTrue(
                    {
                        "case_access_grants",
                        "case_identities",
                        "case_record_revisions",
                        "case_status_definitions",
                        "case_timeline_entries",
                        "case_type_definitions",
                    }.issubset(inspector.get_table_names())
                )
                self.assertIn(
                    "access_mode",
                    {
                        item["name"]
                        for item in inspector.get_columns("case_record_revisions")
                    },
                )
                with engine.connect() as connection:
                    self.assertIn(
                        "f6d3a8b1c4e7",
                        set(MigrationContext.configure(connection).get_current_heads()),
                    )
            finally:
                engine.dispose()


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