import time

class SearchStats:
    def __init__(
            self,
            time_ms,
            visited_cells,
            path_length
    ):
        self.time_ms = time_ms
        self.visited_cells = visited_cells
        self.path_length = path_length
    def __str__(self):
        return (
            f"Время: "
            f"{self.time_ms:.3f} мс\n"

            f"Посещено клеток: "
            f"{self.visited_cells}\n"

            f"Длина пути: "
            f"{self.path_length}"
        )
    
class MazeSolver:
    def __init__(
            self,
            maze,
            strategy
    ):
        self.maze = maze
        self.strategy = strategy
    def setStrategy(
            self,
            strategy
    ):
        self.strategy = strategy
    def solve(self):
        start_time = (
            time.perf_counter()
        )
        path, visited = (
            self.strategy.findPath(
                self.maze,
                self.maze.start,
                self.maze.exit
            )
        )
        end_time = (
            time.perf_counter()
        )
        time_ms = (
            (end_time-start_time)
            *1000
        )
        visited = len(path)
        stats = SearchStats(
            time_ms,
            visited,
            len(path)
        )
        return stats