#---------
# name: NumberGuess.rb
# Solution A
#
#----------------
class Screen

 def cls
   puts ("\n" * 30)
   puts "\a"
 end
 def pause
    STDIN.gets
 end
end

class Game
    $gameNumber = 0 #class variable to store the no. of games

    def display_instruction
        puts "Instructions:\n\n"
        puts "This game randomly generates a number from 1 to 1000 and "
        puts "challenges you to identify it in as few guesses and possible "
        puts "Numbers between 1 and 1000 are valid inputs only"
    end

    def display_greeting
        Console_Screen.cls
        print "\t\t Welcome to the Ruby Number Guessing Game!"
        print "\n\n\n\n\n\n\n\n\n\n\n\n\ Press Enter to "
        print "continue."
        Console_Screen.pause
    end

    def generate_number
        return randomNo = 1 + rand(1000)
    end

    def play_game
        number = generate_number
         $gameNumber +=1 #Increment the variable by 1 everytime a no. is generated
         $guesses = 0
        loop do
            #Console_Screen.cls
            print "\nEnter your guess and press the enter key: "
            $guesses +=1
            reply = STDIN.gets
            reply.chop!
            reply = reply.to_i

            if reply < 1 or reply > 1000 then
                puts "\n\n\n\n\n\n\n"
                puts "Invalid Input"
                puts "\n\n\n\n"
                puts "Valid inputs are numbers between 1 and 1000 only"
                redo # redo the current iteration of the loop
            end

            if reply == number then
                Console_Screen.cls
                print "You have guessed the number! Press Enter to continue."
                Console_Screen.pause
                break
            elsif reply < number then
                Console_Screen.cls
                print "Your guess is too low! Press enter to continue."
                Console_Screen.pause
            elsif reply > number then
                Console_Screen.cls
                print "Your guess is too high! Press enter to continue."
                Console_Screen.pause
            end
        end

    end

    def display_credits
        Console_Screen.cls
        puts "Thanks you for playing the Number Guessing Game #{$gameNumber} times with #{$guesses} guesses!!" # Display number of times game playedon the screen
        puts "Average guesses per game #{$guesses.to_i/$gameNumber.to_i}"
    end

    $noRight = 0

    Console_Screen = Screen.new

    SQ = Game.new

    SQ.display_greeting

    answer = ""

    loop do
        Console_Screen.cls
        print "Are you ready to play the Ruby Number Guessing Game? (y/n): "
        answer = STDIN.gets
        answer.chop!
        break if answer == "y" || answer == "n"
    end

    if answer == "n"
        Console_Screen.cls
        puts "Perhaps another time.\n\n"
    else
        Console_Screen.cls
        SQ.display_instruction
        print "\n\n\n\n\n"
        Console_Screen.pause

        loop do
            SQ.play_game

            Console_Screen.cls

            print "Would you like to play again? (y/n): "

            playAgain = STDIN.gets
            playAgain.chop!

            break if playAgain == "n"
        end

        SQ.display_credits


    end
  end