from tkinter import *
from enum import Enum
import math

buttons = []

field_size = 10
ship_size = 4
ship_direction = 0
field_mode = 0

empty_field = [' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
               ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
               ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
               ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
               ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
               ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
               ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
               ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
               ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
               ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ']

my_field = list(empty_field)
enemy_field = list(empty_field)


# 1. Определите перечисление (Enum) ShootResult со следующими значениями:
# EMPTY (мимо), DAMAGED (ранен), KILLED (убит), UNDEFINED (действие не определено)

class ShootResult(Enum):
    EMPTY = "EMPTY"
    DAMAGED = "DAMAGED"
    KILLED = "KILLED"
    UNDEFINED = "UNDEFINED"


def set_ship(row, col, ship_size, direction):
    if row < 0 or row > field_size:
        return
    if col < 0 or col > field_size:
        return
    index = row * field_size + col
    if direction == 0:
        if field_size - row < ship_size:
            return
        for r in range(row, row + ship_size):
            index = r * field_size + col
            my_field[index] = "1"
    if direction == 1:
        if field_size - col < ship_size:
            return
        for c in range(col, col + ship_size):
            index = row * field_size + c
            my_field[index] = "1"


def shoot(field, row, col):
    if row < 0 or row > field_size - 1:
        return ShootResult.UNDEFINED
    if col < 0 or col > field_size - 1:
        return ShootResult.UNDEFINED
    index = row * field_size + col
    if (field[index]).strip() == "":
        field[index] = "0"
        return ShootResult.EMPTY
    elif (field[index]).strip() == "1":
        field[index] = "\\"
        return ShootResult.DAMAGED
    else:
        return ShootResult.UNDEFINED


def draw_field(window, field):
    for r in range(0, field_size):
        for c in range(0, field_size):
            index = r * field_size + c
            btn = Button(window, text='', width=5, height=2)
            btn.grid(column=c, row=r)
            btn.bind('<Button-1>', lambda e, x=r, y=c: left_button_click(field, x, y))
            btn.bind('<Button-3>', right_button_click)
            btn.bind('<Enter>', lambda e, x=r, y=c: button_enter(field, x, y))
            buttons.append(btn)
    colorize(field, buttons)


def colorize(field, buttons):
    for i in range(len(field)):
        bg = "white"
        if field[i] == "1":
            bg = 'pink'
        if field[i] == "\\":
            bg = 'red'
        if field[i] == "0":
            bg = 'black'
        if field[i] == "p":
            bg = 'blue'
        buttons[i].configure(bg=bg)


def keypress_handler(e):
    global ship_size
    global field_mode
    if e.keysym.isnumeric():
        ship_size = int(e.keysym)
    else:
        if e.keysym == 'm':
            if field_mode == 0:
                field_mode = 1
            else:
                field_mode = 0


def left_button_click(field, row, col):
    if field_mode == 0:
        if check_possible(field, row, col):
            set_ship(row, col, ship_size, ship_direction)
    elif field_mode == 1:
        shoot(field, row, col)
    colorize(field, buttons)


def right_button_click(d):
    global ship_direction
    if field_mode == 0:
        if ship_direction == 0:
            ship_direction = 1
        else:
            ship_direction = 0


def button_enter(field, row, col):
    if field_mode == 0:
        for i in range(0, len(field)):
            if field[i] == "p":
                field[i] = ''

        if check_possible(field, row, col):
            if ship_direction == 0:
                for r in range(row, row + ship_size):
                    field[r * field_size + col] = "p"

            if ship_direction == 1:
                for c in range(col, col + ship_size):
                    field[row * field_size + c] = "p"

        colorize(field, buttons)


def check_possible(field, row, col):
    # Функция должна возвращать True, если можно поставить сюда корабль,
    # в противном случае - False

    if ship_direction == 0:
        # Здесь мы знаем, что корабль помещается на поле.
        if field_size - row >= ship_size:
            # Теперь нужно проверить, не заблокировано ли какое-то из полей,
            for r in range(row, row + ship_size):
                if not check_blocked(field, r, col):
                    return False
            return True

    if ship_direction == 1:
        if field_size - col >= ship_size:
            for c in range(col, col + ship_size):
                if not check_blocked(field, row, c):
                    return False
            return True

    return False


def check_blocked(field, row, col):
    # Функция возвращает True, если все клетки вокруг клетки с координатами row, col
    # либо находятся за пределами поля, либо в них нет корабля/они пустые
    for r in range(row - 1, row + 2):
        for c in range(col - 1, col + 2):
            if 0 <= r < field_size and 0 <= c < field_size:
                cell = (field[r * field_size + c]).strip()
                if cell != '' and cell != 'p':
                    return False
    return True


window = Tk()
window.title("Ship Craft!")
window.geometry('450x410')
window.bind_all('<KeyPress>', keypress_handler)
set_ship(1, 1, 4, 1)
set_ship(0, 6, 3, 0)
set_ship(7, 3, 1, 0)
draw_field(window, my_field)
window.mainloop()

for r in range(0, field_size):
    blocked_string = ""
    ship_string = ""
    for c in range(0, field_size):
        blocked_string += str(check_blocked(my_field, r, c))[0] + ", "
        ship_string += my_field[r * field_size + c] + ', '
    print(blocked_string[:-2] + '          ' + ship_string[:-2])
print("********************************************************************")

for r in range(0, field_size):
    possible_string = ""
    impossible_string = ""
    for c in range(0, field_size):
        possible_string += str(check_possible(my_field, r, c))[0] + ", "
        impossible_string += my_field[r * field_size + c] + ', '
    print(possible_string[:-2] + '          ' + impossible_string[:-2])