/**
 * 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 type TViewData from '../../common/TViewData';
import {
  type Indicator,
  type IndicatorTemplate,
} from '../../component/Indicator';

interface Cci {
  cci?: number;
}

/**
 * CCI
 * CCI（N日）=（TP－MA）÷MD÷0.015
 * 其中，TP=（最高价+最低价+收盘价）÷3
 * MA=近N日TP价的累计之和÷N
 * MD=近N日TP - 当前MA绝对值的累计之和÷N
 *
 */
const commodityChannelIndex: IndicatorTemplate<Cci> = {
  name: 'CCI',
  shortName: 'CCI',
  calcParams: [20],
  figures: [{ key: 'cci', title: 'CCI: ', type: 'line' }],
  calc: (dataList: TViewData[], indicator: Indicator<Cci>) => {
    const params = indicator.calcParams;
    const p = params[0] - 1;
    let tpSum = 0;
    const tpList: number[] = [];
    return dataList.map((TViewData: TViewData, i: number) => {
      const cci: Cci = {};
      const tp = (TViewData.high + TViewData.low + TViewData.close) / 3;
      tpSum += tp;
      tpList.push(tp);
      if (i >= p) {
        const maTp = tpSum / params[0];
        const sliceTpList = tpList.slice(i - p, i + 1);
        let sum = 0;
        sliceTpList.forEach((tp) => {
          sum += Math.abs(tp - maTp);
        });
        const md = sum / params[0];
        cci.cci = md !== 0 ? (tp - maTp) / md / 0.015 : 0;
        const agoTp =
          (dataList[i - p].high + dataList[i - p].low + dataList[i - p].close) /
          3;
        tpSum -= agoTp;
      }
      return cci;
    });
  },
};

export default commodityChannelIndex;