/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements.  See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership.  The ASF licenses this file
* to you 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 Utils from '../utils';

/**
 * 根据26个字母取每一项首字母对数据进行排序,处理数据变换
 * @return {[array]}
 */
export function totalList (source, hotListConfig, cityLocationConfig) {
  const LETTERS = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
  const res = [];
  LETTERS.split('').forEach(letter => {
    const _data = source.filter(item => {
      if (item.pinYin) {
        return item.pinYin.slice(0, 1).toLowerCase() === letter.toLowerCase();
      } else if (item.py) {
        return item.py.slice(0, 1).toLowerCase() === letter.toLowerCase();
      } else {
        return false;
      }
    });
    if (_data.length) {
      res.push({
        title: letter,
        data: _data,
        type: 'list'
      });
    }
  });

  // 处理热门数据
  const hotList = getSpecialData(hotListConfig);
  hotList && res.unshift(hotList);

  // 处理特殊定位数据
  const cityLocation = getSpecialData(cityLocationConfig);
  cityLocation && res.unshift(cityLocation);

  return res;
}

export function getSpecialData (data) {
  if (data && data.type && data.list && data.list.length > 0) {
    const { type, title, list } = data;
    return {
      title,
      type,
      data: type === 'group' ? Utils.arrayChunk(list) : list
    };
  } else {
    return null;
  }
}