import type { BindParams, QueryExecResult } from "sql.js";
import { RpcProvider } from "worker-rpc";
import DbWorker from "./db.worker?worker";

const worker = new DbWorker();

const rpcProvider = new RpcProvider((message, transfer) =>
  worker.postMessage(message, transfer),
);

worker.onmessage = (e) => rpcProvider.dispatch(e.data);

export async function getDbClient() {
  await new Promise<void>((resolve) => {
    rpcProvider.registerSignalHandler("ready", () => {
      resolve();
    });
  });

  return {
    async run(s: string, p?: BindParams[]) {
      return await rpcProvider.rpc("run", { s, p });
    },
    async exec(s: string, p?: BindParams[]): Promise<QueryExecResult[]> {
      return await rpcProvider.rpc("exec", { s, p });
    },
  };
}

export const dbClient = await getDbClient();