//  Olympics.swift  Copyright (c) Kari Laitinen

//  http://www.naturalprogramming.com

//  2014-10-02  File created.
//  2015-10-17  Last modification.

import Foundation

/*  This program demonstrates the use of an array of
    objects, or, more precisely, an array that contains
    references to objects.

    The program first introduces a class named Olympics.
    An Olympics object can contain the data of olympic games.
    By using the Olympics class, an array (Olympics table)
    is defined in the 'main' program. The array is
    used to search for data of olympic games.

    The end of data in the Olympics table is detected in a
    somewhat rude way. It will be your duty to improve
    this program so that the end of data will be detected
    in a more 'official' manner, i.e., there is a standard
    mechanism to detect how many objects are contained in an
    array.

*/

class  Olympics
{
   let  olympic_year : Int
   let  olympic_city : String
   let  olympic_country : String

   init( _ given_olympic_year : Int,
         _ given_olympic_city : String,
         _ given_olympic_country : String )
   {
      olympic_year    =  given_olympic_year
      olympic_city    =  given_olympic_city
      olympic_country =  given_olympic_country
   }

   func get_year() -> Int
   {
      return  olympic_year
   }

   func print_olympics_data()
   {
      print( String( format:
             "\n    In %d, Olympic Games were held in %@, %@.\n",
             olympic_year, olympic_city, olympic_country ) )
   }
}


//  The main program begins.

//  First we create an array that contains Olympics objects.
//  Later on the program will go through this array searching
//  for given year.
   
let olympics_table  =  [ Olympics( 1896, "Athens",   "Greece" ), 
                     Olympics( 1900, "Paris",    "France" ),
                     Olympics( 1904, "St. Louis", "U.S.A." ),
                     Olympics( 1906, "Athens",   "Greece"  ),
                     Olympics( 1908, "London",   "Great Britain"),
                     Olympics( 1912, "Stockholm","Sweden" ),
                     Olympics( 1920, "Antwerp",  "Belgium"   ),
                     Olympics( 1924, "Paris",    "France"    ),
                     Olympics( 1928, "Amsterdam","Netherlands"),
                     Olympics( 1932, "Los Angeles", "U.S.A."),
                     Olympics( 1936, "Berlin",  "Germany"   ),
                     Olympics( 1948, "London",  "Great Britain"),
                     Olympics( 1952, "Helsinki","Finland"  ),
                     Olympics( 1956, "Melbourne","Australia" ),
                     Olympics( 1960, "Rome",     "Italy"   ),
                     Olympics( 1964, "Tokyo",    "Japan"   ),
                     Olympics( 1968, "Mexico City","Mexico" ),
                     Olympics( 1972, "Munich",   "West Germany"),
                     Olympics( 1976, "Montreal", "Canada"  ),
                     Olympics( 1980, "Moscow",   "Soviet Union"),
                     Olympics( 1984, "Los Angeles","U.S.A."),
                     Olympics( 1988, "Seoul",    "South Korea"),
                     Olympics( 1992, "Barcelona","Spain"   ),
                     Olympics( 1996, "Atlanta",  "U.S.A." ),
                     Olympics( 2000, "Sydney",   "Australia" ),
                     Olympics( 2004, "Athens",   "Greece"  ),
                     Olympics( 2008, "Beijing",  "China"   ),
                     Olympics( 2012, "London",   "Great Britain"),
                     Olympics( 2016, "Rio de Janeiro", "Brazil" ),
                     Olympics( 9999, "end of",   "data"  ) ]




print( "\n This program can tell where the Olympic "
     + "\n Games were held in a given year. Give "
     + "\n a year by using four digits: ", terminator: ""  )

let  given_year  =  Int( readLine()! )!

var  olympics_index  =  0

var  table_search_ready  =  false

while  table_search_ready  ==  false 
{
   if  olympics_table[ olympics_index ].get_year()  ==  given_year 
   {
      olympics_table[ olympics_index ].print_olympics_data()

      table_search_ready  =  true
   }
   else if  olympics_table[ olympics_index ].get_year()  ==  9999 
   {
      print( "\n    Sorry, no Olympic Games were held in "
           + String( given_year )  + ".\n" )

      table_search_ready  =  true
   }
   else
   {
      olympics_index  +=  1
   }
}