#!/bin/bash
#########################################################################################################
#                                                                                                       #
#                                              game3.sh                                                 #
#                                                                                                       #
# This is a number guessing game.  The user has 5 chances to guess a random number between 1 and 10.    #
#                                                                                                       #
# The game will only accept valid numerical numbers between 1 and 10.  Invalid input guesses will count #
# towards the 5 guesses.                                                                                #
#                                                                                                       #
# This program will permit multiple plays without exiting to bash shell command prompt.                 #
#                                                                                                       #
#                                                                                                       #
######################################################################################################### 
  
clear                                            # clear the screen

GAMEON=no                                        # sets $GAMEON to no 

GAMECOUNT=0                                      # set game counter to zero
while [ $GAMECOUNT -lt 100 ]                     # start game counter loop - can play 100 times
do

  ANSWER=0                                       # set $ANSWER to 0 value

  if [ $GAMEON = yes ]                           # if a game has already has been played 
    then 
      echo -e "That was game number "$GAMECOUNT".  Would you like to play again? (y/n)--> \c" 
    else                                         # if this is the first game
      echo -e "Would you like to play a game? (y/n)--> \c"
  fi

  read ANSWER                                    # should be y or n response

  if [ $ANSWER = y -o $ANSWER = Y -o $ANSWER = n -o $ANSWER = N ]    # check for valid response
    then

    if [ $ANSWER = y -o $ANSWER = Y ]            # if response is y
      then
      GAMEON=yes                                 # set $GAMEON to yes, indicates games have started
      GAMECOUNT=`expr $GAMECOUNT + 1`            # increment game counter up 1 count

      clear                                      # clear the screen

      echo -e "This is a number guessing game.  You have 5 trys at guessing a number between 1 and 10. \n"

      SECRET=$((RANDOM%10+1))                    # generate a random number between 1 and 10

      COUNTER=0                                  # set guess counter to zero
      while [ $COUNTER -lt 5 ]                   # start guess loop
      do
        echo -e "Enter a number from 1 to 10: \c"   # get user guess input
        read INPUT

        COUNTER=`expr $COUNTER + 1`              # increment guess counter up 1 count

        echo                                     # echo blank line to screen

        if [ $INPUT -lt 11 -a $INPUT -gt 0 ] 2>/dev/null  # check for valid numerical input from 1 to 10
          then                                   # if good input, proceed
            if [ $SECRET = $INPUT ]              # check for correct guess
              then echo -e "Good job, that's correct.  You got it on guess number $COUNTER. \n"
              COUNTER=10                         # set $COUNTER to 10 to indicate game won
            elif [ $INPUT -lt $SECRET ]          # check for too low guess
              then echo -e "That was guess number "$COUNTER".  You guessed too low \n"
            elif [ $INPUT -gt $SECRET ]          # check for too high guess
              then echo -e "That was guess number "$COUNTER".  You guessed too high \n"
            fi
          else                                   # if bad input, tell user
            echo -e "That was guess number "$COUNTER" but you entered "$INPUT "which is not a number between 1 and 10 \n"
        fi

        if [ $COUNTER -eq 10 ]                   # game was won, reset for next game
          then echo                              # send blank line to screen    
        elif [ $COUNTER -eq 5 ]                  # check guess counter, if 5th guess tell user game over
          then echo -e "Sorry, that was your last guess.  Game over. \n"
        else echo -e "Try again. \c"             # if guess was too low or too high
        fi

      done                                       # finishes guess loop

    elif  [ $ANSWER = n -o $ANSWER = N ]         # user does not to start game or play again
      then 
        if [ $GAMEON = yes ]                     # if user played the game
          then 
            clear                                # clear the screen
            echo -e "\nGoodby, thanks for playing my game, I hope you had fun. \n"
            exit                                 # terminates program
        else                                     # if user does not want to start game
            clear                                # clear the screen
            echo -e "\nI hope you will come back later and play. \n"
            exit                                 # terminates program
        fi
    fi
   
    elif [ ! $ANSWER = n -o ! $ANSWER = N ]      # if bad input from user    

      then echo -e "\nYou did not answer y or n, please try again. \n"

  fi

done                                             # finishes game loop