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import compareAsc from '../compareAsc/index'
import differenceInYears from '../differenceInYears/index'
import differenceInMonths from '../differenceInMonths/index'
import differenceInDays from '../differenceInDays/index'
import differenceInHours from '../differenceInHours/index'
import differenceInMinutes from '../differenceInMinutes/index'
import differenceInSeconds from '../differenceInSeconds/index'
import isValid from '../isValid/index'
import requiredArgs from '../_lib/requiredArgs/index'
import toDate from '../toDate/index'
import sub from '../sub/index'
/**
* @name intervalToDuration
* @category Common Helpers
* @summary Convert interval to duration
*
* @description
* Convert a interval object to a duration object.
*
* @param {Interval} interval - the interval to convert to duration
*
* @returns {Duration} The duration Object
* @throws {TypeError} Requires 2 arguments
* @throws {RangeError} `start` must not be Invalid Date
* @throws {RangeError} `end` must not be Invalid Date
*
* @example
* // Get the duration between January 15, 1929 and April 4, 1968.
* intervalToDuration({
* start: new Date(1929, 0, 15, 12, 0, 0),
* end: new Date(1968, 3, 4, 19, 5, 0)
* })
* // => { years: 39, months: 2, days: 20, hours: 7, minutes: 5, seconds: 0 }
*/
export default function intervalToDuration({ start, end }: Interval): Duration {
requiredArgs(1, arguments)
const dateLeft = toDate(start)
const dateRight = toDate(end)
if (!isValid(dateLeft)) {
throw new RangeError('Start Date is invalid')
}
if (!isValid(dateRight)) {
throw new RangeError('End Date is invalid')
}
const duration = {
years: 0,
months: 0,
days: 0,
hours: 0,
minutes: 0,
seconds: 0,
}
const sign = compareAsc(dateLeft, dateRight)
duration.years = Math.abs(differenceInYears(dateLeft, dateRight))
const remainingMonths = sub(dateLeft, { years: sign * duration.years })
duration.months = Math.abs(differenceInMonths(remainingMonths, dateRight))
const remainingDays = sub(remainingMonths, { months: sign * duration.months })
duration.days = Math.abs(differenceInDays(remainingDays, dateRight))
const remainingHours = sub(remainingDays, { days: sign * duration.days })
duration.hours = Math.abs(differenceInHours(remainingHours, dateRight))
const remainingMinutes = sub(remainingHours, { hours: sign * duration.hours })
duration.minutes = Math.abs(differenceInMinutes(remainingMinutes, dateRight))
const remainingSeconds = sub(remainingMinutes, {
minutes: sign * duration.minutes,
})
duration.seconds = Math.abs(differenceInSeconds(remainingSeconds, dateRight))
return duration
}
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