/**
 * Copyright 2015 CANAL+ Group
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import objectAssign from "../../../../../utils/object_assign";
import type {
  ISegmentListIntermediateRepresentation,
  ISegmentUrlIntermediateRepresentation,
} from "../../node_parser_types";
import parseSegmentBase from "./SegmentBase";
import parseSegmentURL from "./SegmentURL";

/**
 * @param {Element} root
 * @returns {Array}
 */
export default function parseSegmentList(
  root: Element,
): [ISegmentListIntermediateRepresentation, Error[]] {
  const [base, baseWarnings] = parseSegmentBase(root);
  let warnings: Error[] = baseWarnings;

  const list: ISegmentUrlIntermediateRepresentation[] = [];

  const segmentListChildren = root.childNodes;
  for (let i = 0; i < segmentListChildren.length; i++) {
    if (segmentListChildren[i].nodeType === Node.ELEMENT_NODE) {
      const currentNode = segmentListChildren[i] as Element;
      if (currentNode.nodeName === "SegmentURL") {
        const [segmentURL, segmentURLWarnings] = parseSegmentURL(currentNode);
        list.push(segmentURL);
        warnings = warnings.concat(segmentURLWarnings);
      }
    }
  }
  const ret = objectAssign(base, { list });
  return [ret, warnings];
}