import { registerUncloneable } from "ext:web/serialization.js";
import {
  ObjectSetPrototypeOf,
  StringPrototypeSlice,
  WeakMap,
} from "ext:core/primordials";
import {
  op_url_search_parse,
  op_url_search_serialize,
  op_url_set,
} from "ext:core/ops";
import type { SearchPair, URLParts } from "ext:core/ops";
import type { URLSearchParams } from "./search_params.js";

interface URLState {
  parts: URLParts;
  searchParams: URLSearchParams;
}
interface ParamsState {
  list: SearchPair[];
  url: URLState | null;
}

const urls = new WeakMap<object, URLState>();
const params = new WeakMap<object, ParamsState>();
registerUncloneable(urls);
registerUncloneable(params);

function privateArray<T = unknown>(): T[];
function privateArray<T extends unknown[]>(value: T): T;
function privateArray(value: unknown[] = []): unknown[] {
  // Private storage must not invoke inherited numeric setters or Array species hooks.
  ObjectSetPrototypeOf(value, null);
  return value;
}
function queryList(parts: URLParts): SearchPair[] {
  const list = privateArray(
    op_url_search_parse(StringPrototypeSlice(parts[9], 1)),
  );
  for (let index = 0; index < list.length; index++) privateArray(list[index]);
  return list;
}
function update(value: ParamsState): void {
  if (value.url) {
    value.url.parts = op_url_set([
      value.url.parts[0],
      "search",
      op_url_search_serialize(value.list),
    ]);
  }
}

export { params, privateArray, queryList, update, urls };
export type { ParamsState };