/**
 * 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 Bias {
  bias1?: number;
  bias2?: number;
  bias3?: number;
}

/**
 * BIAS
 * 乖离率=[(当日收盘价-N日平均价)/N日平均价]*100%
 */
const bias: IndicatorTemplate<Bias> = {
  name: 'BIAS',
  shortName: 'BIAS',
  calcParams: [6, 12, 24],
  figures: [
    { key: 'bias1', title: 'BIAS6: ', type: 'line' },
    { key: 'bias2', title: 'BIAS12: ', type: 'line' },
    { key: 'bias3', title: 'BIAS24: ', type: 'line' },
  ],
  regenerateFigures: (params: any[]) => {
    return params.map((p: number, i: number) => {
      return { key: `bias${i + 1}`, title: `BIAS${p}: `, type: 'line' };
    });
  },
  calc: (dataList: TViewData[], indicator: Indicator<Bias>) => {
    const { calcParams: params, figures } = indicator;
    const closeSums: number[] = [];
    return dataList.map((TViewData: TViewData, i: number) => {
      const bias: Bias = {};
      const close = TViewData.close;
      params.forEach((p, index) => {
        closeSums[index] = (closeSums[index] ?? 0) + close;
        if (i >= p - 1) {
          const mean = closeSums[index] / params[index];
          bias[figures[index].key] = ((close - mean) / mean) * 100;

          closeSums[index] -= dataList[i - (p - 1)].close;
        }
      });
      return bias;
    });
  },
};

export default bias;