import random

SIZE = 10
CRITTER = "*"
EMPTY = " "
debugOn = False

# Author:  James Tam
# This function was created entirely by the above author and is
# used with permission.
# @copy()
# @Argument: a reference to the list that will be copied
# @The list must be already created and properly initialized
# @prior to calling this function!
# @Return value: a complete copy of the list passed as the
# @argument.
def copy(world):
    temp = []
    for r in range (0,SIZE,1):
        temp.append([])
        for c in range (0,SIZE,1):
            temp[r].append(world[r][c])
    return(temp)

# Author:  James Tam
# This function was created entirely by the above author and is
# used with permission.
# '''
# @ This function comes the creation of the list with file input.
# @ It combines readFromFile() and intialize() into one function.
# @ Normally a function should only implement one well define task but in this case
# @ the creation of the list is so trivial it may be okay to combine it with file input.
# @createListFileRead()
# @Argument: None
# @Return value: the game world in the form of a 2D list (each element has
# @been initialized to values read in from the input file
# '''
def createListFileRead():
    r = -1
    c = -1
    world = []
    inputFilename = input("Name of input file: ")
    try:
        inputFile = open(inputFilename,"r")
        r = 0
        for line in inputFile:
            world.append([])
            c = 0
            for ch in line:
                if (c < SIZE):
                    world[r].append(ch)
                c = c + 1
            r = r + 1
        inputFile.close()
    except IOError:
        print("Error reading from " + inputFilename)
     
    return(world)

# Author:  James Tam
# This function was created entirely by the above author and is
# used with permission.
# '''
# @display()
# @Argument: two references to the 2D list which is game world.
# @The list must be already created and properly initialized
# @prior to calling this function!
# @Return value: None
# @Displays each element of the world with each row all on one line
# @Each element is bound: above, left, right and below with a bar (to
# @make elements easier to see.
# @Each list is displayed side by side
# <Old list>#<TAB><New list>
# '''
def display(turn,oldWorld,newWorld):
    # Displays a row at a time of each list
    print("Turn #%d" %turn)
    print("BEFORE\t\t\tAFTER")
    for r in range (0,SIZE,1):

        # Row of dashes before each row of old and new list
        # (Dashes for old list)
        for i in range (0, SIZE, 1): 
            print("%s" %(" -"), end="")
        print("#\t",end="")
        # (Dashes for new list)
        for i in range (0, SIZE, 1): 
            print("%s" %(" -"), end="")
        print()

        # Display one row of old world list
        for c in range (0,SIZE,1):
            # Display: A vertical bar and then element (old list) 
            print("|%s" %(oldWorld[r][c]), end = "")
        # Separate the lists with a number sign and a tab
        print("", end = "#\t")    

        # Display one row of new world list
        for c in range (0,SIZE,1):
            # Display: A vertical bar and then element (new list) 
            print("|%s" %(newWorld[r][c]), end = "")
        print("|")

    # Row of dashes after end of last row (old world list)
    for i in range (0, SIZE, 1): 
        print("%s" %(" -"), end="")
    print("#\t",end="")

    # Row of dashes after end of each row (new world list)
    for i in range (0, SIZE, 1): 
        print("%s" %(" -"), end="")
    print()

# Author:  James Tam
# This function was created entirely by the above author and is
# used with permission.
# '''
# @ This function works in conjunction with readFromFile()
# @intialize()
# @Argument: None
# @Return value: the game world in the form of a 2D list (each element
# @is set to an exclamation mark).
# '''
def initialize():
    world = []                  
    for r in range (0, SIZE, 1):   
        world.append ([])       
        for c in range (0, SIZE, 1): 
            world[r].append ("!")
    return(world)
	
# '''
# @ This method works in conjunction with initialize. Initialize creates
# @ the list with list elements containing a default value '!'. This method
# @ relies on the list already being created and sets each list element to
# @ a corresponding value read in from the input file e.g. the string at
# @ row 2 and column 4 in the input file will initialize the list element
# @ at this same location in the 2D list (game world).
# @readFromFile()
# @Argument: None
# @Return value: the game world in the form of a 2D list (each element
# @will now be initialized to the values read in from the input file
# '''
def readFromFile():
    r = -1
    c = -1
    world = initialize() # Needed to create the 2D list
    inputFilename = input("Name of input file: ")

    try:
        inputFile = open(inputFilename,"r")
        r = 0
        # Read one line at a time from the file into a string
        for line in inputFile:  
            c = 0
            # Iterate 1 char at a time through the string
            for ch in line:  
                # Including EOL there's 11 characters per line
                # 10x10 list , exclude the EOL to avoid reading
                # outside the bounds of the list (10 columns)
                if (c < SIZE):
                    # Set list element to the single char 
                    # read from file
                    world[r][c] = ch 
                    # Advance to next element along row 
                    c = c + 1  
                # Entire row has been set to values read in from 
                # file, move to next row
            r = r + 1  
        inputFile.close()
    except IOError:
        print("Error reading from " + inputFilename)
    return(world) 

#################################################################
# Author:  James Tam
# This function was created entirely by the above author and is
# used with permission.
def start():
    turn = 0
    world = readFromFile()
    newWorld = copy(world)
    display(turn,world,newWorld)

start()