import { Pipe, PipeTransform } from '@angular/core'
@Pipe({
  name: 'timeDifference'
})
export class MTimeDifferencePipe implements PipeTransform {
  transform(start: any, end: any): string {
    const startTime: Date = new Date(start)
    let endTime: Date

    if (end !== undefined) {
      endTime = new Date(end)
    } else {
      endTime = new Date()
    }

    if (!startTime.getTime() || !endTime.getTime()) {
      return 'Invalid Date'
    }

    let diff: number = Math.floor(
      (endTime.getTime() - startTime.getTime()) / 1000
    )

    const days: number = Math.floor(diff / (60 * 60 * 24))
    diff = diff - days * (60 * 60 * 24)

    const hours: number = Math.floor(diff / (60 * 60))
    diff = diff - hours * (60 * 60)

    const minutes: number = Math.floor(diff / 60)
    diff -= minutes * 60

    const seconds: number = diff

    const pad: string = '00'

    let daysFormatted: string = ''

    if (days > 0 && days < 2) {
      daysFormatted = ' day - '
    } else if (days > 1) {
      daysFormatted = ' days - '
    }

    return (
      (days > 0 ? days + daysFormatted : daysFormatted) +
      pad.substring(0, pad.length - (hours + '').length) +
      hours +
      ':' +
      pad.substring(0, pad.length - (minutes + '').length) +
      minutes +
      ':' +
      pad.substring(0, pad.length - (seconds + '').length) +
      seconds
    )
  }
}