import {
  ObjectDefineProperty as define,
  ReflectApply as apply,
  SymbolIterator,
  TypeError,
} from "ext:core/primordials";
import { clone } from "ext:core/structured_clone";
import { array, dictionary, isObject, required } from "ext:web/idl.js";
import {
  classify,
  setStructuredClone,
  transferCallbacks,
} from "ext:web/serialization.js";
import { dataCloneError } from "ext:web/events.js";
const structuredClone = {
  structuredClone(value: unknown, options: unknown = undefined): unknown {
    required(arguments.length, 1);
    const raw = dictionary(options).transfer, transfer = array<object>();
    if (raw !== undefined) {
      if (!isObject(raw)) {
        throw new TypeError("Transfer list must be a sequence");
      }
      const method = raw[SymbolIterator];
      if (typeof method !== "function") {
        throw new TypeError("Transfer list must be iterable");
      }
      const iterator = apply(method, raw, []);
      if (!isObject(iterator)) throw new TypeError("Invalid transfer iterator");
      const next = iterator.next;
      if (typeof next !== "function") {
        throw new TypeError("Invalid transfer iterator next method");
      }
      while (true) {
        const step = apply(next, iterator, []);
        if (!isObject(step)) {
          throw new TypeError("Invalid transfer iterator result");
        }
        if (step.done) break;
        const item = step.value;
        if (!isObject(item)) {
          throw new TypeError("Transfer entries must be objects");
        }
        transfer[transfer.length] = item;
      }
    }
    const callbacks = transferCallbacks(transfer, dataCloneError);
    try {
      return clone(
        value,
        transfer,
        classify,
        callbacks.cloneHost,
        dataCloneError,
        callbacks.prepare,
        callbacks.validate,
        callbacks.commit,
      );
    } finally {
      callbacks.clear();
    }
  },
}.structuredClone;
define(globalThis, "structuredClone", {
  value: structuredClone,
  writable: true,
  configurable: true,
  enumerable: true,
});
setStructuredClone(structuredClone);
export { structuredClone };