import time


class SearchStats:
    def __init__(self, execution_time, visited_count, path_length, path):
        self.execution_time = execution_time
        self.visited_count = visited_count
        self.path_length = path_length
        self.path = path

    def __str__(self):
        return ("f == Статистика поиска == =\n"
                f"Время выполнения: {self.execution_time_ms:.4f} мс\n"
                f"Посещено клеток:  {self.visited_count}\n"
                f"Длина пути:       {self.path_length} клеток\n")


class MazeSolver:
    def __init__(self, maze, strategy):
        self._maze = maze
        self._strategy = strategy

    def setStrategy(self, strategy):
        self._strategy = strategy

    def solve(self):

        if not self.maze or not self.strategy:
            raise ValueError("Не задан лабиринт или стратегия поиска!")

        start_time = time.perf_counter()

        path, visited_count = self.strategy.findPath(
            self.maze, self.maze.start, self.maze.exit)

        end_time = time.perf_counter()

        execution_time_ms = (end_time - start_time) * 1000

        path_length = len(path)

        return SearchStats(execution_time_ms, visited_count, path_length, path)