#----------------------------------------------------------------------
# Today: we chase hurkles!  This is a variant of an old text-mode
# computer game from the 1970s.  A hurkle is a happy beast, that hides
# somewhere in a grid of rows and columns, and the player has a small
# number of guesses to figure out where the hurkle is hiding.  When a
# guess is incorrect, the hurkle will tell the player which direction
# to go (North, NorthWest, West, SouthWest, etc.).  The game stops when
# either the hurkle has been found or the player runs out of guesses.
#
# This version copyright (C) February 2020, Dr. William T. Verts
#----------------------------------------------------------------------

import random,math

Size = 20                               # Size of the playing area is Size x Size cells
Guesses = int(math.log(Size, 2)) + 1    # Number of guesses dependent on playing area size

#----------------------------------------------------------------------
# Get an integer from the user that is between 0 and Size-1 (inclusive)
# and also prevent illegal data entries from crashing the program.
#----------------------------------------------------------------------

def GetInput (Message):                 # Message is a string to be printed
    N = -1
    while (N < 0) or (N >= Size):
        try:
            N = int(input(Message))
        except:
            N = -1
    return N

#----------------------------------------------------------------------
# Main game play.  This entire block of code should probably be inside
# its own function such as Main()
#----------------------------------------------------------------------

print ("The hurkle is on a ", Size, " by ", Size, " grid.")
print ("Enter values between 0 and ", Size-1)
print ("You have ", Guesses, " guesses")
HurkleR = random.randrange(Size)
HurkleC = random.randrange(Size)

# Uncomment the next "cheat" line when debugging the code.
#print ("The hurkle is at ", HurkleR, HurkleC)

Found = False
Guess = 0
while (Guess < Guesses) and not Found:
    # Go to the next guess
    Guess = Guess + 1
    print ("Enter Guess #", Guess)
    
    # Enter a guess    
    R = GetInput("Enter the row --- ")    
    C = GetInput("Enter the column --- ")
    
    # Check to see if the hurkle has been found.
    # If not, tell the user which way to go.
    if   (HurkleR <  R) and (HurkleC <  C): print ("Go NorthWest")
    elif (HurkleR <  R) and (HurkleC == C): print ("Go North")
    elif (HurkleR <  R) and (HurkleC >  C): print ("Go NorthEast")
    elif (HurkleR == R) and (HurkleC <  C): print ("Go West")
    elif (HurkleR == R) and (HurkleC >  C): print ("Go East")
    elif (HurkleR >  R) and (HurkleC <  C): print ("Go SouthWest")
    elif (HurkleR >  R) and (HurkleC == C): print ("Go South")
    elif (HurkleR >  R) and (HurkleC >  C): print ("Go SouthEast")
    else: Found = True

if Found:
    print ("You found me!")
else:
    print ("I got away!")
    print ("I was at ", HurkleR, HurkleC)