/**
 * 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 noop from "../../../../../../utils/noop";
import type { IMPDIntermediateRepresentation } from "../../../node_parser_types";
import type ParsersStack from "../parsers_stack";
import { TagName } from "../types";
import { generateMPDAttrParser, generateMPDChildrenParser } from "./MPD";

/**
 * @param {Object} rootObj
 * @param {WebAssembly.Memory} linearMemory
 * @param {ParsersStack} parsersStack
 * @param {ArrayBuffer} fullMpd
 * @returns {Function}
 */
export function generateRootChildrenParser(
  rootObj: { mpd?: IMPDIntermediateRepresentation },
  linearMemory: WebAssembly.Memory,
  parsersStack: ParsersStack,
  fullMpd: ArrayBufferLike,
): (nodeId: number) => void {
  return function onRootChildren(nodeId: number) {
    switch (nodeId) {
      case TagName.MPD: {
        rootObj.mpd = {
          children: {
            baseURLs: [],
            locations: [],
            periods: [],
            utcTimings: [],
          },
          attributes: {},
        };
        const childrenParser = generateMPDChildrenParser(
          rootObj.mpd.children,
          linearMemory,
          parsersStack,
          fullMpd,
        );
        const attributeParser = generateMPDAttrParser(
          rootObj.mpd.children,
          rootObj.mpd.attributes,
          linearMemory,
        );
        parsersStack.pushParsers(nodeId, childrenParser, attributeParser);
        break;
      }

      default:
        // Allows to make sure we're not mistakenly closing a re-opened
        // tag.
        parsersStack.pushParsers(nodeId, noop, noop);
        break;
    }
  };
}