af83/chouette-core

import { isDate, isObject, isString,  } from 'lodash'
import format from 'date-fns/format'
import parse from 'date-fns/parse'
import isBefore from 'date-fns/isBefore'

const timeFormat = 'HH:mm'

export const formatTime = time => {
    if (isDate(time)) {
        return format(time, timeFormat)
    }

    if (isObject(time)) {
        return format(
            new Date(2000, 1, 1, time.hour, time.minute), timeFormat)
    }
}

export const parseTime = time => {
    if (isString(time)) {
        const match = time.match(/\d{2}:\d{2}/)
        return parse(match && match[0], timeFormat, new Date())
    }

    if (isObject(time)) {
        return parse(`${time.hour}:${time.minute}`, timeFormat, new Date())
    }
}
    

export const passingTimeIsBefore = (nextStop, prevStop) =>
    isBefore(
        formatTime(nextStop.arrival_time),
        formatTime(prevStop.arrival_time)
    )

export const computeDayOffSet = (prevStop, stop) => {
    let dayOffSet = (stop.departure_day_offset || 0) + !!prevStop

    if (!!prevStop && passingTimeIsBefore(stop, prevStop)) {
        dayOffSet += 1
    }

    return {
        departure_day_offset: dayOffSet,
        arrival_day_offset: dayOffSet
    }
}