from __future__ import annotations

import tempfile
import unittest
from pathlib import Path

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

from govoplan_addresses.backend.db.models import Base
from govoplan_addresses.backend.manifest import get_manifest
from govoplan_core.db.migrations import migrate_database


class AddressesMigrationTests(unittest.TestCase):
    def test_schema_identifiers_fit_postgresql_limit(self) -> None:
        overlong_indexes = sorted(
            index.name
            for table in Base.metadata.tables.values()
            if table.name.startswith("addresses_")
            for index in table.indexes
            if index.name and len(index.name) > 63
        )
        self.assertEqual([], overlong_indexes)

    def test_fresh_database_reaches_import_profile_head(self) -> None:
        with tempfile.TemporaryDirectory(prefix="govoplan-addresses-migration-") as directory:
            url = f"sqlite:///{Path(directory) / 'addresses.db'}"
            migrate_database(
                database_url=url,
                enabled_modules=("addresses",),
                manifest_factories=(get_manifest,),
            )
            engine = create_engine(url)
            try:
                with engine.connect() as connection:
                    self.assertIn(
                        "d6e8f9a0b1c2",
                        set(MigrationContext.configure(connection).get_current_heads()),
                    )
                    tables = set(inspect(connection).get_table_names())
                    self.assertIn("addresses_import_profiles", tables)
                    self.assertIn("addresses_import_runs", tables)
            finally:
                engine.dispose()


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