from __future__ import annotations

import os
from pathlib import Path

import pytest

from tenant_engine.postgres_store import PostgresTenantStore


def clean_postgres_store(tmp_path: Path) -> PostgresTenantStore:
    dsn = os.getenv("TENANT_ENGINE_TEST_DATABASE_URL", "").strip()
    if not dsn:
        pytest.skip("set TENANT_ENGINE_TEST_DATABASE_URL to exercise PostgreSQL conformance")
    try:
        import psycopg
    except ImportError:
        pytest.skip("install tenant-engine[postgres] to exercise PostgreSQL conformance")

    migration = Path(__file__).parents[1] / "migrations/postgres/0001_tenant_store.sql"
    with psycopg.connect(dsn, autocommit=True) as connection:
        connection.execute(migration.read_text(encoding="utf-8"))
        connection.execute(
            """TRUNCATE guardrail_changes, guardrail_overrides,
               idempotency_receipts, events, plans, grants, tenants
               RESTART IDENTITY CASCADE"""
        )
    url_file = tmp_path / "postgres-url"
    url_file.write_text(dsn, encoding="utf-8")
    return PostgresTenantStore(str(url_file), min_pool_size=1, max_pool_size=4)