import type { QuickJSContext, QuickJSHandle } from "quickjs-emscripten";

import { call } from "../vmutil";

export default function marshalProperties(
  ctx: QuickJSContext,
  target: object | Function,
  handle: QuickJSHandle,
  marshal: (target: unknown) => QuickJSHandle,
): void {
  const descs = ctx.newObject();
  const cb = (key: string | number | symbol, desc: PropertyDescriptor) => {
    const keyHandle = marshal(key);
    const valueHandle = typeof desc.value === "undefined" ? undefined : marshal(desc.value);
    const getHandle = typeof desc.get === "undefined" ? undefined : marshal(desc.get);
    const setHandle = typeof desc.set === "undefined" ? undefined : marshal(desc.set);

    ctx.newObject().consume(descObj => {
      Object.entries(desc).forEach(([k, v]) => {
        const v2 =
          k === "value"
            ? valueHandle
            : k === "get"
            ? getHandle
            : k === "set"
            ? setHandle
            : v
            ? ctx.true
            : ctx.false;
        if (v2) {
          ctx.setProp(descObj, k, v2);
        }
      });
      ctx.setProp(descs, keyHandle, descObj);
    });
  };

  const desc = Object.getOwnPropertyDescriptors(target);
  Object.entries(desc).forEach(([k, v]) => cb(k, v));
  Object.getOwnPropertySymbols(desc).forEach(k => cb(k, (desc as any)[k]));

  call(ctx, `Object.defineProperties`, undefined, handle, descs).dispose();

  descs.dispose();
}