const undefinedBuff = new Blob([new TextEncoder().encode('undefined')]);
const nullBuff = new Blob([new TextEncoder().encode('null')]);

export default async function serialize(val: unknown, depth = 16): Promise<Blob> {
    while(true) {
        if(depth <= 0) throw new Error("Call depth exceeded limit.");

        if(val instanceof Promise) val = await val;
        else if(val instanceof Function) {
            if(val.length !== 0) throw new Error('Can\'t serialize an argument-accepting function');
            val = val();
        }
        else break;

        depth--;
    }

    if(val === undefined) return undefinedBuff;
    if(val === null) return nullBuff;
    if(val instanceof Blob) return val;

    while(typeof val !== 'string' && val && val.toString !== Object.prototype.toString && val.toString instanceof Function) {
        val = val.toString();
    }

    return new Blob([new TextEncoder().encode(JSON.stringify(val))]);
}