# Tk_connect4.py

# Tk_connect4.py

# ZZZ might soon make quite a different game from this basic code

from Tkinter import *
import random

main = Tk()

c = Canvas(main, width=400, height=500)
c.pack()

for z in range(5):
    z*=100
    c.create_line(z+2, 2, z+2, 400+2)
    c.create_line(2, z+2, 400+2, z+2)

grid = [
    "0", "1", "2", "3",
    "4", "5", "6", "7",
    "8", "9", "10", "11",
    "12", "13", "14", "15"
]
# Klikk prosedyre
def click(event):
    across = int(c.canvasx(event.x) / 100)
    down = int(c.canvasy(event.y) / 100)
    square = across + (down * 4)
    print across, down

    if grid[square] == "X" or grid[square] == "O":
        return

    if winner(grid):
        return

    grid[square] = "O"
    draw_shape("O", across, down)

    if winner(grid):
        return

    play_move()

def o4xy(x, y):
    return x * 100 + 2, y * 100 + 2, (x+1) * 100 + 2, (y+1) * 100 + 2

def draw_shape(shape, across, down):
    if shape == "O":
        c.create_oval(o4xy(across, down))
    else:
        c.create_line(o4xy(across, down))
        c.create_line(across * 100 + 2, (down+1) * 100 + 2,
            (across+1) * 100 + 2, down * 100 + 2)

# Dette gjer at datamaskinen faktisk har ein hjerne, og ikkje bare velger tilfeldige ruter
def winner(grid):
    for across in range(4):
        row = across * 4
        line = grid[row] + grid[row+1] + grid[row+2] + grid[row+3]
        if line == "XXXX" or line == "OOOO":
            return True

    for down in range(4):
        line = grid[down] + grid[down+4] + grid[down+8] + grid[down+12]
        if line == "XXXX" or line == "OOOO":
            return True

    line = grid[0] + grid[5] + grid[10] + grid[15]
    if line == "XXXX" or line == "OOOO":
        return True

    line = grid[3] + grid[6] + grid[9] + grid[12]
    if line == "XXXX" or line == "OOOO":
        return True

# Finner ledige ruter
def free_squares():
    output = []
    for position, square in enumerate(grid):
        if square != "X" and square != "O":
            output.append(position)
    return output

def play_move():
    moves = free_squares()
    square = random.choice(moves)

# Hvis et blokkerende trekk eksisterer kjører den det
    for possible in moves:
        new_grid = list(grid)
        new_grid[possible] = "O"
        if winner(new_grid):
            square = possible
            break

# Hvis et vinnende trekk eksisterer kjører den det
    for possible in moves:
        new_grid = list(grid)
        new_grid[possible] = "X"
        if winner(new_grid):
            square = possible
            break

    down = square // 4
    across = square % 4

    grid[square] = "X"
    draw_shape("X", across, down)

c.bind("<Double-Button-1>", click)

mainloop()