package com.guinetik.hexafun.examples.tasks;
   
   import java.util.ArrayList;
   import java.util.List;
   import java.util.Map;
   import java.util.Optional;
   import java.util.concurrent.ConcurrentHashMap;
   
   /**
   * In-memory implementation of TaskRepository.
   *
   * <p>This is an adapter that implements the output port.
   * Useful for testing and demos. In production, you'd have
   * a JPA, JDBC, or other persistent implementation.
   */
  public class InMemoryTaskRepository implements TaskRepository {
  
      private final Map<String, Task> tasks = new ConcurrentHashMap<>();
  
      @Override
      public Task save(Task task) {
          tasks.put(task.id(), task);
          return task;
      }
  
      @Override
      public Optional<Task> findById(String id) {
          return Optional.ofNullable(tasks.get(id));
      }
  
      @Override
      public List<Task> findAll() {
          return new ArrayList<>(tasks.values());
      }
  
      @Override
      public boolean delete(String id) {
          return tasks.remove(id) != null;
      }
  
      /**
       * Clear all tasks (useful for testing).
       */
      public void clear() {
          tasks.clear();
      }
  
      /**
       * Get the count of tasks.
       */
      public int count() {
          return tasks.size();
      }
  }