# Author:  James Tam
# Version: June 4, 2022

import random

COLUMN_NUMBERING = " 0 1 2 3 4 5 6 7 8 9"
'''
 New learning objective: two parallel lists (state of one affects the other).
'''

# CONSTANTS
SIZE = 10
EMPTY = " "
ERROR = "!"
MONEY = "$"

'''
   @ display
   @ parameters: two references to a pair of lists of 2D character
   @ return: nothing
'''
def display(list1,list2):
    r = -1
    c = -1
    HORIZONTAL_GRID = " -" * SIZE
    
    r = 0
    #For each list: Number each column
    print("%s\t%s" %(COLUMN_NUMBERING,COLUMN_NUMBERING)) 
    while (r < SIZE):
        c = 0
        #For each list: print a line of dashes before each row
        print("%s\t%s" %(HORIZONTAL_GRID,HORIZONTAL_GRID))
        while (c < SIZE):
            #For list1: print a vertical bar before each element
            print("|%s" %(list1[r][c]), end="")
            c = c + 1
        c = 0
        #Printed complete row of list 1, add final vertical bar
        print("|", end = "")
        #Finished printing a row of list1, add a tab separator before
        #printing out the corresponding row of list2
        print("\t", end="")
        while (c < SIZE):
            #For list1: print a vertical bar before each element
            print("|%s" %(list2[r][c]), end="")
            c = c + 1
        #Printed complete row of list 2, add final vertical bar, move to next line
        print("|")
        r = r + 1
    print("%s\t%s" %(HORIZONTAL_GRID,HORIZONTAL_GRID))

'''
   @ 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 <= 75)):
        element = EMPTY
    elif ((randomNumber >= 75) and (randomNumber <= 100)):
        element = MONEY
    else:
        element = ERROR
    return(element)

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

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

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

'''
   @ parallelState()
   @ Parameter: a reference to a 2D list of char
   @ returns a 2D list
   @ Learning: Implementing two parallel lists. How to have one list's state
   @ can affect another list. Creates the elements of the 2nd parallel list as
   @ state is paralleled.
'''
def parallelState(list1):
    r = -1
    c = -1
    list2 = []
    
    r = 0
    while (r < SIZE):
        c = 0
        list2.append([])
        while (c < SIZE):
            #Creates the list element as the state is paralelled.
            if (list1[r][c] == EMPTY):
                list2[r].append(0)
            elif (list1[r][c] == MONEY):
                list2[r].append(1)
            c = c + 1
        r = r + 1
    return(list2)

# MAIN EXECUTION POINT
def start():
    list1 = []
    list2 = []
    
    list1 = initialize()
    list2 = parallelState(list1)
    display(list1,list2)


start()