//  Filecopy.kt  (c) Kari Laitinen

//  http://www.naturalprogramming.com

//  2024-02-21  File created.

/*  Compilation and execution:

      c:\freeware\kotlinc\bin\kotlinc Filecopy.kt -include-runtime -d RunThis.jar

      java -jar RunThis.jar

*/

import java.io.*

fun main()
{
   print( "\n This program copies text from one file"
       +  "\n to another file. Please, give the name of"
       +  "\n the file to be copied: " ) 

   val name_of_file_to_be_copied  =  readLine()!! 

   print( "\n Give the name of the duplicate file: " ) 

   val name_of_new_duplicate_file  =  readLine()!! 

   try
   {
      val file_to_be_copied = BufferedReader( FileReader( name_of_file_to_be_copied ) )
      
      val new_duplicate_file = PrintWriter( FileWriter( name_of_new_duplicate_file ) )

      print( "\n Copying in progress ... \n" )

      var text_line_counter = 0
         
      var end_of_input_file_encountered = false

      while ( end_of_input_file_encountered == false )
      {
         val text_line_from_file = file_to_be_copied.readLine()
      
         if ( text_line_from_file == null )
         {
            end_of_input_file_encountered = true
         }
         else
         {
            new_duplicate_file.println( text_line_from_file )
            text_line_counter ++
         }
      }

      file_to_be_copied.close()
      new_duplicate_file.close()
      
      print( "\n Copying ready. " + text_line_counter + " lines were copied. \n" )
   }
   catch ( caught_file_not_found_exception : FileNotFoundException )
   {
      print( "\n\n  File \"" + name_of_file_to_be_copied + "\" not found.\n" )
   }
   catch ( caught_io_exception : IOException )
   {
      print( "\n\n  File error. Probably cannot write to \""
             + name_of_file_to_be_copied + "\".\n" )
   }
}