/*  Showtime.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 "${'$'}"
    
    In the GregorianCalendar class, days of week are indicated
    by numbers from 1 to 7 so that 1 means Sunday and 7 means Saturday.
*/

import java.util.Calendar
import java.util.GregorianCalendar

fun main()
{
   val names_of_days_of_week = arrayOf<String>(

     "Sunday",  "Monday", "Tuesday", "Wednesday", "Thursday",
     "Friday",  "Saturday" )

   val names_of_months = arrayOf<String>(

     "January", "February", "March", "April", "May", "June",
     "July", "August", "September", "October", "November",
     "December"  )

   val date_and_time_now : Calendar = GregorianCalendar()

   print( String.format( "\n Current time is:  %d:%02d:%02d.%03d \n",
       date_and_time_now.get( Calendar.HOUR_OF_DAY ),
       date_and_time_now.get( Calendar.MINUTE ),
       date_and_time_now.get( Calendar.SECOND ),
       date_and_time_now.get( Calendar.MILLISECOND ) ) )

   print( "\n Current date is:  " 
     +  names_of_days_of_week
                 [ date_and_time_now.get( Calendar.DAY_OF_WEEK ) - 1 ]
     +  ", day " + date_and_time_now.get( Calendar.DAY_OF_MONTH )
     +  " of "
     +  names_of_months[ date_and_time_now.get( Calendar.MONTH ) ]
     + " in year "  +  date_and_time_now.get( Calendar.YEAR ) + ".\n" )

   print( "\n Time zone is:     "
                  +  date_and_time_now.getTimeZone().getDisplayName() )
   print( "\n Difference from UTC/GMT in hours : "
         +  date_and_time_now.get(Calendar.ZONE_OFFSET)/(60*60*1000) )

   print( String.format( "\n\n Short 24-h time:  %tR", date_and_time_now ) )
   print( String.format( "\n Long 24-h time:   %tT", date_and_time_now ) )
   print( String.format( "\n Long 12-h time:   %tr", date_and_time_now ) )
   print( String.format( "\n MM/DD/YY date:    %tD", date_and_time_now ) )
   print( String.format( "\n ISO date:         %tF", date_and_time_now ) )
   print( String.format( "\n Date and time:    %tc", date_and_time_now ) )

   print( String.format(
          "\n Textual date:     %1${'$'}tA, %1${'$'}tB %1${'$'}td, %1${'$'}tY \n\n",
                                                  date_and_time_now ) )

/**
   // The last statements above could be written alternatively as
   // shown below. The method System.currentTimeMillis() returns a long
   // value that contains the current time of the computer in milliseconds
   // since 1970-01-01 00:00.
                                                  
   val current_time_ticks  =  System.currentTimeMillis()

   print( String.format( "\n\n Short 24-h time:  %tR", current_time_ticks ) )
   print( String.format( "\n Long 24-h time:   %tT", current_time_ticks ) )
   print( String.format( "\n Long 12-h time:   %tr", current_time_ticks ) )
   print( String.format( "\n MM/DD/YY date:    %tD", current_time_ticks ) )
   print( String.format( "\n ISO date:         %tF", current_time_ticks ) )
   print( String.format( "\n Date and time:    %tc", current_time_ticks ) )

   print( String.format(
          "\n Textual date:     %1${'$'}tA, %1${'$'}tB %1${'$'}td, %1${'$'}tY \n",
                                                  current_time_ticks ) )
**/
}