стратегии работают тестировние прошли

konnovaea/maze_solver.py

@@ -106,15 +106,137 @@ class TextFileMazeBuilder(MazeBuilder):
 
         return maze
     
-    #тест
+from collections import deque
+import heapq
+from abc import ABC, abstractmethod
+
+class PathfindingStrategy(ABC):
+
+    @abstractmethod
+    def find_path(self, maze, start, exit):
+        pass
+
+class BFSStrategy(PathfindingStrategy):
+
+    def find_path(self, maze, start, exit):
+        if start is None or exit is None:
+            return []
+        
+        queue = deque()
+        queue.append((start, [start]))
+    
+        visited = set()
+        visited.add(start)
+        
+        while queue:
+            current, path = queue.popleft()
+            
+            if current == exit:
+                return path
+            
+            neighbors = maze.get_neighbors(current)
+            for neighbor in neighbors:
+                if neighbor not in visited:
+                    visited.add(neighbor)
+                    queue.append((neighbor, path + [neighbor]))
+        
+        return []
+    
+class  DFSStrategy(PathfindingStrategy):
+
+    def find_path(self, maze, start, exit):
+        if start is None or exit is None:
+            return []
+        
+        stack = [(start, [start])]
+
+        visited = set()
+        visited.add(start)
+
+        while stack:
+            current, path = stack.pop()
+
+            if current == exit:
+                return path
+            
+            for neighbor in maze.get_neighbors(current):
+                if neighbor not in visited:
+                    visited.add(neighbor)
+                    stack.append((neighbor, path + [neighbor]))
+
+        return []
+    
+class AStartStrategy(PathfindingStrategy):
+
+   def _heuristic(self, cell, exit):
+       return abs(cell.x - exit.x) + abs(cell.y -exit.y)
+   
+   def find_path(self, maze, start, exit):
+       if start is None or exit is None:
+           return []
+       
+       counter = 0
+       heap = []
+       heapq.heappush(heap, (self._heuristic(start, exit), counter, start, [start]))
+
+       g_score = {start: 0}
+
+       visited = set()
+
+       while heap:
+           f_score, _, current, path = heapq.heappop(heap)
+
+           if current in visited:
+               continue
+           
+           visited.add(current)
+
+           if current == exit:
+               return path
+           
+           for neighbor in maze.get_neighbors(current):
+               tentative_g = g_score[current] + 1
+
+               if neighbor not in g_score or tentative_g < g_score[neighbor]:
+                   g_score[neighbor] = tentative_g
+                   f_score = tentative_g + self._heuristic(neighbor, exit)
+                   counter += 1
+                   heapq.heappush(heap, (f_score, counter, neighbor, path + [neighbor]))
+
+       return []
+   
+#тест
 
 if __name__ == "__main__":
     builder = TextFileMazeBuilder()
     maze = builder.build_from_file("maze1.txt")
-
-    print(f"лабиринт загружен: {maze}")
-    print(f"старт: {maze.start}")
-    print(f"выход: {maze.exit}")
-
+    
+    print("Лабиринт загружен")
+    print(f"Старт: {maze.start}")
+    print(f"Выход: {maze.exit}")
+    
+    # Проверяем, что старт и выход проходимые
+    print(f"Старт проходим: {maze.start.is_passable()}")
+    print(f"Выход проходим: {maze.exit.is_passable()}")
+    
+    # Проверяем соседей старта
     neighbors = maze.get_neighbors(maze.start)
-    print(f"соседи старта: {neighbors}")
+    print(f"Соседи старта: {neighbors}")
+    
+    # Тестируем BFS
+    bfs = BFSStrategy()
+    path = bfs.find_path(maze, maze.start, maze.exit)
+    print(f"BFS путь: {[f'({c.x},{c.y})' for c in path]}")
+    print(f"BFS длина пути: {len(path)}")
+    
+    # Тестируем DFS
+    dfs = DFSStrategy()
+    path = dfs.find_path(maze, maze.start, maze.exit)
+    print(f"DFS путь: {[f'({c.x},{c.y})' for c in path]}")
+    print(f"DFS длина пути: {len(path)}")
+    
+    # Тестируем A*
+    astar = AStartStrategy()
+    path = astar.find_path(maze, maze.start, maze.exit)
+    print(f"A* путь: {[f'({c.x},{c.y})' for c in path]}")
+    print(f"A* длина пути: {len(path)}")