"""Модели данных: Cell, Maze, Player"""

from dataclasses import dataclass
from typing import List, Optional


@dataclass
class Cell:
    """Клетка лабиринта"""
    x: int
    y: int
    is_wall: bool = False
    is_start: bool = False
    is_exit: bool = False
    weight: int = 1  # для взвешенных лабиринтов
    
    def is_passable(self) -> bool:
        """Проверка, можно ли пройти через клетку"""
        return not self.is_wall
    
    def __hash__(self) -> int:
        return hash((self.x, self.y))
    
    def __eq__(self, other: object) -> bool:
        if not isinstance(other, Cell):
            return False
        return self.x == other.x and self.y == other.y


class Maze:
    """Лабиринт"""
    
    def __init__(self, width: int, height: int):
        self.width = width
        self.height = height
        self._cells: List[List[Cell]] = []
        self.start: Optional[Cell] = None
        self.exit: Optional[Cell] = None
        self.name: str = "Лабиринт"
    
    def set_cells(self, cells: List[List[Cell]]) -> None:
        """Устанавливает клетки и определяет старт/выход"""
        self._cells = cells
        for row in cells:
            for cell in row:
                if cell.is_start:
                    self.start = cell
                if cell.is_exit:
                    self.exit = cell
    
    def get_cell(self, x: int, y: int) -> Optional[Cell]:
        """Получение клетки по координатам"""
        if 0 <= x < self.width and 0 <= y < self.height:
            return self._cells[y][x]
        return None
    
    def get_neighbors(self, cell: Cell) -> List[Cell]:
        """Получение всех проходимых соседей клетки"""
        neighbors = []
        directions = [(0, -1), (0, 1), (-1, 0), (1, 0)]  # вверх, вниз, влево, вправо
        
        for dx, dy in directions:
            nx, ny = cell.x + dx, cell.y + dy
            neighbor = self.get_cell(nx, ny)
            if neighbor and neighbor.is_passable():
                neighbors.append(neighbor)
        
        return neighbors
    
    def __str__(self) -> str:
        """Строковое представление лабиринта"""
        result = []
        for row in self._cells:
            line = ''
            for cell in row:
                if cell.is_start:
                    line += 'S'
                elif cell.is_exit:
                    line += 'E'
                elif cell.is_wall:
                    line += '#'
                else:
                    line += ' '
            result.append(line)
        return '\n'.join(result)


class Player:
    """Игрок для пошагового режима"""
    
    def __init__(self, start_cell: Cell):
        self.current_cell = start_cell
        self.start_cell = start_cell
        self.history: List[Cell] = []
    
    def move_to(self, cell: Cell) -> None:
        """Перемещение игрока в клетку"""
        self.history.append(self.current_cell)
        self.current_cell = cell
    
    def undo(self) -> None:
        """Отмена последнего перемещения"""
        if self.history:
            self.current_cell = self.history.pop()
    
    def can_move_to(self, cell: Cell) -> bool:
        """Проверка возможности перемещения"""
        return cell.is_passable()
    
    def reset(self) -> None:
        """Сброс игрока на старт"""
        self.current_cell = self.start_cell
        self.history.clear()