import { i18n } from 'boot/i18n'
import { getKamailioRangeElements, kamailioDatesetToHuman } from 'src/helpers/kamailio-timesets-converter'

export const DAY_MAP = [2, 3, 4, 5, 6, 7, 1]
export const DEFAULT_WEEKDAYS = [
	DAY_MAP[0],
	DAY_MAP[1],
	DAY_MAP[2],
	DAY_MAP[3],
	DAY_MAP[4]
]

export function getDayNameByNumber (dayNumber, isShortName = false) {
	const daysNamesMap = [
		i18n.t('Monday'),
		i18n.t('Tuesday'),
		i18n.t('Wednesday'),
		i18n.t('Thursday'),
		i18n.t('Friday'),
		i18n.t('Saturday'),
		i18n.t('Sunday')
	]
	// NOTE: in some languages the short days names may be not just first two letters of the full day's name
	const daysShortNamesMap = [
		i18n.t('Mo'),
		i18n.t('Tu'),
		i18n.t('We'),
		i18n.t('Th'),
		i18n.t('Fr'),
		i18n.t('Sa'),
		i18n.t('Su')
	]
	return isShortName ? daysShortNamesMap[dayNumber] : daysNamesMap[dayNumber]
}

export function timeSetDateExact (times) {
	return times[0].year + '/' + times[0].month + '/' + times[0].mday
}

export function timeSetDateRange (times) {
	try {
		const hDateset = kamailioDatesetToHuman(times)
		return (hDateset.length === 0)
			? i18n.t('empty')
			: hDateset.map(d => (d.from === d.to) ? d.from : d.from + '-' + d.to).join(', ')
	} catch (e) {
		return i18n.t('data error')
	}
}

export function timeSetWeekdays (times) {
	const mappedWeekdays = times.map((time) => {
		return DAY_MAP.indexOf(parseInt(time.wday))
	})
	mappedWeekdays.sort()
	const weekdaysStr = mappedWeekdays.map(weekday => getDayNameByNumber(weekday)).join(', ')
	return weekdaysStr
}

export function timeSetOfficeHoursSameTime (times) {
	const weekdays = new Set()
	times.forEach(kamailioTimeRange => {
		const wdayRange = getKamailioRangeElements(kamailioTimeRange.wday)[0]
		for (let day = wdayRange.from; day <= wdayRange.to; day++) {
			// To have Monday the first day of a week we are mapping days to change order
			weekdays.add(DAY_MAP.indexOf(day))
		}
	})
	const weekdaysSorted = Array.from(weekdays)
	weekdaysSorted.sort()
	const weekdaysStr = weekdaysSorted.map(weekday => getDayNameByNumber(weekday)).join(', ')
	return weekdaysStr
}

export function timeSetTimes () {
	return '...'
}