codefun/conect_four.py at master · girisandeep/codefun · GitHub

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H = 6
W = 7
RED = 1
BLUE = 2

def find_all_pos(puzzle, player):
    result = []
    for i, col in enumerate(puzzle):
        if len(col) < H:
            j = len(col)
            result.append((i, j))
    return result

def at(puzzle, ii, jj, player):
    if ii > -1 and ii < len(puzzle):
        if jj > -1 and jj < len(puzzle[ii]):
            return puzzle[ii][jj] == player
    return False

def count(i, j, di, dj, puzzle, player):
    cnt = 0
    # Count left Horizontal
    ii, jj = i, j
    while True:
        ii, jj = ii + di, jj + dj
        if at(puzzle, ii, jj, player):
            cnt += 1
        else:
            break
    return cnt

def is_win(i, j, puzzle, player):
    if count(i, j, -1, 0, puzzle, player) + count(i, j, 1, 0, puzzle, player) >= 3:
        return True
    if count(i, j, 0, -1, puzzle, player) + count(i, j, 0, 1, puzzle, player) >= 3:
        return True
    if count(i, j, -1, -1, puzzle, player) + count(i, j, 1, 1, puzzle, player) >= 3:
        return True
    if count(i, j, -1, 1, puzzle, player) + count(i, j, 1, -1, puzzle, player) >= 3:
        return True
    return False

def other_player(player):
    if player == 1:
        return 2
    else:
        return 1


def deep_copy(puzzle):
    new_puzzle = []
    for col in puzzle:
        new_puzzle.append(col.copy())
    return new_puzzle

def make_move(puzzle, player, depth = 1):
    all_poses = find_all_pos(puzzle, player)
    print("possible positions", all_poses)
    for ic, j in all_poses:
        puzzle[ic].append(player)
        if is_win(ic, j, puzzle, player):
            return True, (ic, j)
        new_puzzle = deep_copy(puzzle)
        op = other_player(player)
        if depth < 8 and make_move(new_puzzle, op, depth + 1):
            puzzle[ic].pop()
        else:
            return True, (ic, j)
    return False, None

def is_over(puzzle):
    for col in puzzle:
        if len(col) != H:
            return False
    return True

def printp(puzzle):
    for j in range(H-1, -1, -1):
        val = []
        for col in puzzle:
            if j < len(col):
                val.append(str(col[j]))
            else:
                val.append("_")
        print("[" + " | ".join(val) + "]")

if __name__ == '__main__2':
    puzzle = [[] for i in range(W)] #Left is bottom, # End of list is top
    puzzle[0] = [1,1,1,1]
    print(is_win(0, 0, puzzle, 1))

if __name__ == '__main__':
    puzzle = [[] for i in range(W)] #Left is bottom, # End of list is top
    while not is_over(puzzle):
        print(f"I,{RED}, am making a move...")
        result, pos = make_move(puzzle, RED)
        if not result:
            print("Can't make a move.")
            break
        else:
            print("Made move!")
        irow, icol = pos
        if is_win(irow, icol, puzzle, BLUE):
            print("I won!")
            break
        elif is_over(puzzle):
            print("Game Over")
            break
        printp(puzzle)
        irow = None
        icol = None
        while True:
            srow = input(f"Player {BLUE} to move. Which row do you want to put [1-{W}]:")
            irow = int(srow) - 1
            if irow < 0 or irow >= W or len(puzzle[irow]) >= H:
                print("Invalid Move")
            else:
                icol = len(puzzle[irow])
                puzzle[irow].append(BLUE)
                break
        if is_win(irow, icol, puzzle, BLUE):
            print("You won!")
            break