/**
 * Copyright (c) 2022 Huawei Device Co., Ltd.
 * 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 i18n from '@ohos.i18n';

const YEAR_CONVERT: number = 2697;
const YEAR_CYCLE: number = 60;
const LUNAR_MONTH = ['正', '二', '三', '四', '五', '六', '七', '八', '九', '十', '冬', '腊'];
const LUNAR_DAY = ['初一', '初二', '初三', '初四', '初五', '初六', '初七', '初八', '初九', '初十', '十一', '十二', '十三', '十四',
'十五', '十六', '十七', '十八', '十九', '廿十', '廿一', '廿二', '廿三', '廿四', '廿五', '廿六', '廿七', '廿八', '廿九', '三十',
'三一'];
const NUM_CHAR = ['零', '一', '二', '三', '四', '五', '六', '七', '八', '九'];

class CalendarUtil {
  //公历转农历
  getLunarDate(date: Date) {
    let calendar = i18n.getCalendar('zh-CN', 'chinese');
    calendar.setTime(date);
    const lunarMonth = calendar.get('month');
    const lunarDay = calendar.get('date');
    let lunarYear = calendar.get('era') * YEAR_CYCLE + calendar.get('year') - YEAR_CONVERT;
    return {
      year: lunarYear,
      month: lunarMonth,
      day: lunarDay
    }
  }

  formatLunarDate(lunar: any) {
    if (!lunar) {
      return '';
    }
    let result: string = '';
    if (lunar.year) {
      result += `${lunar.year}年`
    }
    if (lunar.month != undefined) {
      result += `${LUNAR_MONTH[lunar.month]}月`
    }
    if (lunar.day) {
      result += ` ${LUNAR_DAY[lunar.day - 1]}`
    }
    return result;
  }
}

export default new CalendarUtil();