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   "id": "4d8d9af1-63da-4f25-9140-a0b3c58cb96d",
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   "source": [
    "from typing import List, Dict, Optional\n",
    "from strategiesPathfinding_strategy import PathFindingStrategy\n",
    "from modelsMaze import Maze\n",
    "from modelsCell import Cell\n",
    "\n",
    "class DFSStrategy(PathFindingStrategy):\n",
    "    \"\"\"Поиск в глубину - быстрый, но не обязательно кратчайший.\"\"\"\n",
    "    \n",
    "    @property\n",
    "    def name(self) -> str:\n",
    "        return \"DFS\"\n",
    "    \n",
    "    def find_path(self, maze: Maze, start: Cell, exit_cell: Cell) -> List[Cell]:\n",
    "        if start == exit_cell:\n",
    "            return [start]\n",
    "        \n",
    "        stack = [start]\n",
    "        came_from: Dict[Cell, Optional[Cell]] = {start: None}\n",
    "        visited_count = 0\n",
    "        \n",
    "        while stack:\n",
    "            current = stack.pop()\n",
    "            visited_count += 1\n",
    "            \n",
    "            if current == exit_cell:\n",
    "                self._last_visited_count = visited_count\n",
    "                return self._reconstruct_path(came_from, start, current)\n",
    "            \n",
    "            for neighbor in maze.get_neighbors(current):\n",
    "                if neighbor not in came_from:\n",
    "                    came_from[neighbor] = current\n",
    "                    stack.append(neighbor)\n",
    "        \n",
    "        self._last_visited_count = visited_count\n",
    "        return []\n",
    "    \n",
    "    @property\n",
    "    def last_visited_count(self) -> int:\n",
    "        return getattr(self, '_last_visited_count', 0)"
   ]
  }
 ],
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