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kazimdsaidul/mobile bill assessment

Created July 7, 2020 03:42
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  1. kazimdsaidul created this gist Jul 7, 2020.
    76 changes: 76 additions & 0 deletions mobile bill assessment
    View file
    Original file line number Diff line number Diff line change
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    class ExampleUnitTest {
    @Test
    fun test8Hours1Min(){
    val calBill = calculateMobileBill("2020-07-06 00:00:01", "2020-07-06 08:01:00")
    assertEquals(calBill, 602.0, 0.0)
    }
    @Test
    fun test1Second(){
    val calBill = calculateMobileBill("2020-07-06 00:00:00", "2020-07-06 00:00:01")
    assertEquals(calBill, 1.0, 0.0)
    }
    @Test
    fun test10Second(){
    val calBill = calculateMobileBill("2020-07-06 00:00:00", "2020-07-06 00:00:10")
    assertEquals(calBill, 1.0, 0.0)
    }
    @Test
    fun test2MinuteAnd10Second(){
    val calBill = calculateMobileBill("2020-07-06 00:00:00", "2020-07-06 00:02:10")
    assertEquals(calBill, 3.0, 0.0)
    }
    @Test
    fun test24Hours(){
    val calBill = calculateMobileBill("2020-07-06 00:00:00", "2020-07-06 23:59:01")
    assertEquals(calBill, 3600.0, 0.0)
    }
    @Test
    fun test2Days(){
    val calBill = calculateMobileBill("2020-07-06 00:00:00", "2020-07-07 23:59:01")
    assertEquals(calBill, (3600.0 *2), 0.0)
    }
    fun calculateMobileBill(startDateAndTime: String?, endDateAndTime: String?): Double {

    val format: DateTimeFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")
    val start: LocalDateTime = LocalDateTime.parse(startDateAndTime, format)
    val end: LocalDateTime = LocalDateTime.parse(endDateAndTime, format)
    var totalBill = 0.0

    Stream.iterate(start, { date -> date.plusDays(1) })
    .limit(ChronoUnit.DAYS.between(start, end) + 1)
    .forEach {
    println("start "+start)
    println("end "+end)
    println("--------------")

    val hourEnd = end.toLocalTime().hour
    val minuteEnd = end.toLocalTime().minute
    val secondEnd = end.toLocalTime().second

    if (end.toLocalTime().hour<6){
    totalBill = calculateBlockBill(totalBill, secondEnd, minuteEnd, hourEnd, 1)
    }else if (end.toLocalTime().hour<12){
    val remainHours = hourEnd - 6
    totalBill = calculateBlockBill( totalBill = totalBill, hour = 6, prices = 1)
    totalBill = calculateBlockBill(totalBill = totalBill, hour = remainHours, minute = minuteEnd, second = secondEnd, prices = 2)
    }else if (end.toLocalTime().hour<18){
    val remainHours = hourEnd - 12
    totalBill = calculateBlockBill( totalBill = totalBill, hour = 12, prices = 2)
    totalBill = calculateBlockBill(totalBill = totalBill, hour = remainHours, minute = minuteEnd, second = secondEnd, prices = 3)
    }else if (end.toLocalTime().hour<24){
    val remainHours = hourEnd - 18
    totalBill = calculateBlockBill( totalBill = totalBill, hour = 12, prices = 3)
    totalBill = calculateBlockBill(totalBill = totalBill, hour = remainHours, minute = minuteEnd, second = secondEnd, prices = 4)
    }
    }
    return totalBill
    }

    private fun calculateBlockBill(totalBill: Double = 0.0, second: Int=0, minute: Int=0, hour: Int=0, prices: Int=0): Double {
    var bill = totalBill
    bill += if (second == 0) 0 else 1 * prices
    bill += if (minute == 0) 0 else minute * prices
    bill += if (hour == 0) 0 else hour * prices * 60
    return bill
    }