import { ReadStream } from "fs";

// eslint-disable-next-line @typescript-eslint/no-explicit-any
function extend(who: any, from: any, overwrite = true) {
    const ownProps = Object.getOwnPropertyNames(Object.getPrototypeOf(from)).concat(Object.keys(from));
    ownProps.forEach((prop) => {
        if (prop === "constructor" || from[prop] === undefined) return;
        if (who[prop] && overwrite) {
            who[`_${prop}`] = who[prop];
        }
        if (typeof from[prop] === "function") who[prop] = from[prop].bind(who);
        else who[prop] = from[prop];
    });
}

function stob(stream: ReadStream): Promise<Buffer> {
    return new Promise((resolve) => {
        const buffers: Buffer[] = [];
        stream.on("data", buffers.push.bind(buffers));

        stream.on("end", () => {
            switch (buffers.length) {
                case 0:
                    resolve(Buffer.allocUnsafe(0));
                    break;
                case 1:
                    resolve(buffers[0]);
                    break;
                default:
                    resolve(Buffer.concat(buffers));
            }
        });
    });
}

export { extend, stob };