#The sys module allows an exit without a load of bad red writing!
import sys

cross = "X"
nought = "O"
blank = "#"
space = " "

def createGrid(size):
	#Creates a 2d array, then fills it with the correct number of rows and columns
	#A size of N gives an NxN grid. You could adapt this program to have different sized boards this way.
	global grid
	grid = [[blank]]
	#Add sufficient columns:
	for i in range(1,size):
		grid.append([blank])
	#Add sufficient rows:
	for j in range(1,size+1):
		for k in range(1,size):
			grid[j-1].append(blank)
	#You can referance the contents of a square using format grid[row][column]. Bear in mind 0 is the first row, not 1!

def changeGrid(row,column,new):
	if row == "1":
		rowActual = 0
	elif row == "2":
		rowActual = 1
	elif row == "3":
		rowActual = 2
	else:
		print("Sorry, your row was invalid. I'm going to crash now. ZZZZzzzzz....")
		sys.exit()
	print("Row actual is",rowActual)
	if column == "a":
		columnActual = 0
	elif column == "b":
		columnActual = 1
	elif column == "c":
		columnActual = 2
	else:
		print("Sorry, your column was invalid. I'm going to crash now. ZZZZzzzzz....")
		sys.exit()
	print("Column Actual is",columnActual)
	global grid
	if (grid[rowActual][columnActual] == cross and new == nought) or (grid[rowActual][columnActual] == nought and new == cross):
		print("Sorry, that space is taken! I don't know what to do now so I'm gonna go to sleep. ZZZZZzzzzz....")
		sys.exit()
	grid[rowActual][columnActual] = new
	print(grid[rowActual][columnActual])
	printGrid()

def printGrid():
	print("    A   B   C")
	print("")
	print("1  ",grid[0][0],space,grid[0][1],space,grid[0][2])
	print("")
	print("2  ",grid[1][0],space,grid[1][1],space,grid[1][2])
	print("")
	print("3  ",grid[2][0],space,grid[2][1],space,grid[2][2])

def winMessage(player):
	print("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~")
	print(player, "has won the game!")
	print("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~")
	sys.exit()

def checkWin(player):
	win = False
	if grid[0][0] == grid[0][1] == grid[0][2] != blank:
		win = True
	elif grid[1][0] == grid[1][1] == grid[1][2] != blank:
		win = True
	elif grid[2][0] == grid[2][2] == grid[2][2] != blank:
		win = True
	elif grid[0][0] == grid[1][0] == grid[2][0] != blank:
		win = True
	elif grid[0][1] == grid[1][1] == grid[2][1] != blank:
		win = True
	elif grid[0][2] == grid[1][2] == grid[2][2] != blank:
		win = True
	elif grid[0][0] == grid[1][1] == grid[2][2] != blank:
		win = True
	elif grid[0][2] == grid[1][1] == grid[2][0] != blank:
		win = True
	if win == True:
		winMessage(player)

def takeTurn(player):
	if player == cross:
		print("******************************************")
		print("It's X's turn!")
		print("******************************************")
	if player == nought:
		print("******************************************")
		print("It's O's turn!")
		print("******************************************")
	printGrid()
	row = input("What row do you want to play (1-3):")
	column = input("What column do you want to play (A-C):")
	changeGrid(row,column,player)
	checkWin(player)

#Main body of the code:
def main():
	createGrid(3)
	#Limited to 100 cycles for security purposes
	for i in range(1,100):
		takeTurn(cross)
		takeTurn(nought)

main()