export const durationOptions = [
    {
      id: 0,
      title: 'h:mm',
      example: '(e.g. 1:23)',
      regex: /(\d+)(?::(\d+))?/
    }, {
      id: 1,
      title: 'h:mm:ss',
      example: '(e.g. 3:45, 1:23:40)',
      regex: /(\d+)?(?::(\d+))?(?::(\d+))?/
    }, {
      id: 2,
      title: 'h:mm:ss.s',
      example: '(e.g. 3:34.6, 1:23:40.0)',
      regex: /(\d+)?(?::(\d+))?(?::(\d+))?(?:.(\d{0,4})?)?/
    }, {
      id: 3,
      title: 'h:mm:ss.ss',
      example: '(e.g. 3.45.67, 1:23:40.00)',
      regex: /(\d+)?(?::(\d+))?(?::(\d+))?(?:.(\d{0,4})?)?/
    }, {
      id: 4,
      title: 'h:mm:ss.sss',
      example: '(e.g. 3.45.678, 1:23:40.000)',
      regex: /(\d+)?(?::(\d+))?(?::(\d+))?(?:.(\d{0,4})?)?/
    }
  ]
  
  // pad zero
  // mm && ss
  // e.g.  3 -> 03
  // e.g. 12 -> 12
  // sss
  // e.g.  1 -> 001
  // e.g. 10 -> 010
  const padZero = (val: number, isSSS = false) => {
    return (val + '').padStart(isSSS ? 3 : 2, '0')
  }
  
  export const convertMS2Duration = (val: any, durationType: number) => {
    if (val === "" || val === null || val === undefined) { return val }
    // 600.000 s --> 10:00 (10 mins)
    const milliseconds = Math.round((val % 1) * 1000)
    const centiseconds = Math.round(milliseconds / 10)
    const deciseconds = Math.round(centiseconds / 10)
    const hours = Math.floor(parseInt(val, 10) / (60 * 60))
    const minutes = Math.floor((parseInt(val, 10) - (hours * 60 * 60)) / 60)
    const seconds = parseInt(val, 10) - (hours * 60 * 60) - (minutes * 60)
  
    if (durationType === 0) {
      // h:mm
      return `${padZero(hours)}:${padZero(minutes + (seconds >= 30 ? 1 : 0))}`
    } else if (durationType === 1) {
      // h:mm:ss
      return `${padZero(hours)}:${padZero(minutes)}:${padZero(seconds)}`
    } else if (durationType === 2) {
      // h:mm:ss.s
      return `${padZero(hours)}:${padZero(minutes)}:${padZero(seconds)}.${deciseconds}`
    } else if (durationType === 3) {
      // h:mm:ss.ss
      return `${padZero(hours)}:${padZero(minutes)}:${padZero(seconds)}.${padZero(centiseconds)}`
    } else if (durationType === 4) {
      // h:mm:ss.sss
      return `${padZero(hours)}:${padZero(minutes)}:${padZero(seconds)}.${padZero(milliseconds, true)}`
    }
    return val
  }
  
  export const convertDurationToSeconds = (val: any, durationType: number) => {
    // 10:00 (10 mins) -> 600.000 s
    const res = {
      _sec: 0,
      _isValid: true
    }
    const durationRegex = durationOptions[durationType].regex
    if (durationRegex.test(val)) {
      let h, mm, ss
      const groups = val.match(durationRegex)
      if (groups[0] && groups[1] && !groups[2] && !groups[3] && !groups[4]) {
        const val = parseInt(groups[1], 10)
        if (groups.input.slice(-1) === ':') {
          // e.g. 30:
          h = groups[1]
          mm = 0
          ss = 0
        } else if (durationType === 0) {
          // consider it as minutes
          // e.g. 360 -> 06:00
          h = Math.floor(val / 60)
          mm = Math.floor((val - ((h * 3600)) / 60))
          ss = 0
        } else {
          // consider it as seconds
          // e.g. 3600 -> 01:00:00
          h = Math.floor(groups[1] / 3600)
          mm = Math.floor(groups[1] / 60) % 60
          ss = val % 60
        }
      } else if (durationType !== 0 && groups[1] && groups[2] && !groups[3]) {
        // 10:10 means mm:ss instead of h:mm
        // 10:10:10 means h:mm:ss
        h = 0
        mm = groups[1]
        ss = groups[2]
      } else {
        h = groups[1] || 0
        mm = groups[2] || 0
        ss = groups[3] || 0
      }
  
      if (durationType === 0) {
        // h:mm
        res._sec = h * 3600 + mm * 60
      } else if (durationType === 1) {
        // h:mm:ss
        res._sec = h * 3600 + mm * 60 + ss * 1
      } else if (durationType === 2) {
        // h:mm:ss.s (deciseconds)
        const ds = groups[4] || 0
        const len = Math.log(ds) * Math.LOG10E + 1 | 0
        const ms = (
          // e.g. len = 4: 1234 -> 1, 1456 -> 1
          // e.g. len = 3:  123 -> 1,  191 -> 2
          // e.g. len = 2:   12 -> 1 ,  16 -> 2
          len === 4
            ? Math.round(ds / 1000)
            : len === 3
              ? Math.round(ds / 100)
              : len === 2
                ? Math.round(ds / 10)
                // take whatever it is
                : ds
        ) * 100
        res._sec = h * 3600 + mm * 60 + ss * 1 + ms / 1000
      } else if (durationType === 3) {
        // h:mm:ss.ss (centiseconds)
        const cs = groups[4] || 0
        const len = Math.log(cs) * Math.LOG10E + 1 | 0
        const ms = (
          // e.g. len = 4: 1234 -> 12, 1285 -> 13
          // e.g. len = 3:  123 -> 12,  128 -> 13
          // check the third digit
          len === 4
            ? Math.round(cs / 100)
            : len === 3
              ? Math.round(cs / 10)
              // take whatever it is
              : cs
        ) * 10
        res._sec = h * 3600 + mm * 60 + ss * 1 + ms / 1000
      } else if (durationType === 4) {
        // h:mm:ss.sss (milliseconds)
        let ms = groups[4] || 0
        const len = Math.log(ms) * Math.LOG10E + 1 | 0
        ms = (
          // e.g. 1235 -> 124
          // e.g. 1234 -> 123
          len === 4
            ? Math.round(ms / 10)
            // take whatever it is
            : ms
        ) * 1
        res._sec = h * 3600 + mm * 60 + ss * 1 + ms / 1000
      }
    } else {
      res._isValid = false
    }
    return res
  }
  
  /**
   * @copyright Copyright (c) 2021, Xgene Cloud Ltd
   *
   * @author Wing-Kam Wong <wingkwong.code@gmail.com>
   *
   * @license GNU AGPL version 3 or any later version
   *
   * This program is free software: you can redistribute it and/or modify
   * it under the terms of the GNU Affero General Public License as
   * published by the Free Software Foundation, either version 3 of the
   * License, or (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU Affero General Public License for more details.
   *
   * You should have received a copy of the GNU Affero General Public License
   * along with this program. If not, see <http://www.gnu.org/licenses/>.
   *
   */