# Author:  James Tam
# Version: November 4, 2021
# Learning objective: traversing a 1D list and checking the state of each
# list element.

import random

'''
 New learning objective: how to modify select elements of a 2D list
 based on a condition.
'''

# CONSTANTS
SIZE = 20
EMPTY = "   "
SMILE = ":-)"
BIG_SMILE = ":-D"
ERROR = "!!!"


'''
   @ checkForEmoticons()
   @ argument: 1D list of Strings
   @ return value: none
   @ 
   @ Display a status message for different types of emoticons.
   
'''
def checkForEmoticons(world):
   r = -1
   for r in range (0,SIZE,1):
       if (world[r] == SMILE):
           print("Someone is happy!")
       elif (world[r] == BIG_SMILE):
           print("Someone is VERY happy!!!")

'''
   @ display()
   @ argument: 1D list of Strings
   @ return value: none
   @ 
   @ Shows the current state of the world. To make it easier to see and
   @ interpret the state elements are separated by vertical bars.
   
'''
def display(world):
   r = -1
   for r in range (0,SIZE,1):
       #Display a vertical bar before each element
       print("|%s" %world[r], end="")
   #Add a final bar after the last element
   print("|")
'''
   @ generateElemement
   @ a random number argument (precondition 1<=number<=100)
   @ returns a string of length one (an element to populate
     world
'''
def generateElement(randomNumber):
    element = ERROR
    if ((randomNumber >= 1) and (randomNumber <= 85)):
        element = EMPTY
    elif ((randomNumber >= 86) and (randomNumber <= 95)):
        element = SMILE
    elif ((randomNumber >= 96) and (randomNumber <= 100)):
        element = BIG_SMILE
    else:
        element = ERROR
    return(element)


'''
   @ initialize()
   @ no parameters
   @ returns a fully initialized randomly generated world

'''
def initialize():
    world = []
    r = -1
    randomNumber = -1
    newElement = ERROR

    for r in range (0,SIZE,1):
        randomNumber = random.randrange(1,101)
        element = generateElement(randomNumber)
        world.append(element) # Add new element to the end of the row
    return(world)





# MAIN EXECUTION POINT
def start():
    world = initialize()
    display(world)
    checkForEmoticons(world)    

start()