import { Pool, QueryResult } from "pg";
import { ExtractTablesWithRelations } from "drizzle-orm";
import { PgTransaction } from "drizzle-orm/pg-core";
import * as schema from "./schema";

// Export the db instance from your drizzle setup (make sure your drizzle file is updated for Postgres)
export { db } from "./drizzle";
export * as schema from "./schema";

// If you need to export Postgres errors, you can export them from the pg package.
// (Optional – remove if not needed)
export { DatabaseError } from "pg";
export const ErrorCodes = {
  UNIQUE_VIOLATION: "23505",
};

/**
 * This type alias is provided to avoid leaking pg types outside of this package.
 *
 * Note:
 * - The first generic parameter is set to "async" because most PostgreSQL drivers (like pg) are asynchronous.
 * - The second generic parameter uses pg's QueryResult type.
 */
export type LifetrackerDBTransaction = PgTransaction<any, ExtractTablesWithRelations<typeof schema>>;