import { Bert } from "./bert.js";
import { Duplex } from "node:stream";
const bert = new Bert();
const fakeWrite = () => undefined;
process.stdout.write = fakeWrite;
export class Port extends Duplex {
    constructor() {
        super({ objectMode: true });
    }
    read() {
        const lenBytes = process.stdin.read(4);
        if (lenBytes) {
            const termLen = bert.bytesToInt(lenBytes, 4, true);
            const termBytes = process.stdin.read(termLen);
            if (termBytes) {
                return bert.decode(termBytes);
            }
            else {
                process.stderr.write(`Read should have gotten ${termLen} bytes.\n`);
                return null;
            }
        }
        else
            return null;
    }
    write(obj, encodingOrCallback, callback) {
        const actualCallback = callback || typeof encodingOrCallback === "function" ? encodingOrCallback : undefined;
        try {
            const term = bert.encode(obj, true);
            const len = Buffer.alloc(4);
            len.writeUInt32BE(term.length, 0);
            process.stdout.write(len);
            return process.stdout.write(term, actualCallback);
        }
        catch (error) {
            process.stderr.write(`Error writing: ${error}\n`);
            return false;
        }
    }
    // When all the data is done passing, it stops.
    _final() {
        this.push(null);
    }
}