/*  ImportantBirthdays.kt  Copyright (c) Kari Laitinen

    http://www.naturalprogramming.com

    2020-10-31  File created.
    
    If you want to insert a dollar sign into a Kotlin string,
    you need to write it like "${'$'}"
*/

import java.time.LocalDate

fun main()
{
   print( "\n Type in your date of birth as YYYY-MM-DD"
       +  "\n Please, use four digits for the year"
       +  "\n and two digits for month and day:  " )

   val date_of_birth_as_string = readLine()!!

   val date_of_birth  = LocalDate.parse( date_of_birth_as_string )

   print( String.format( "\n   You were born on a %tA",  date_of_birth ) )
   print( "\n   Here are your days to celebrate. You are\n" ) 

   var years_to_celebrate = 10L

   while ( years_to_celebrate < 80 )
   {
      val date_to_celebrate = date_of_birth.plusYears( years_to_celebrate )

      print( String.format( "\n   %1${'$'}d years old on %2${'$'}tF (%2${'$'}tA)",
                            years_to_celebrate,
                            date_to_celebrate  ) )

      years_to_celebrate = years_to_celebrate + 10
   }
   
   print( "\n\n" )
}