#pragma once
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/.
*/
/** @file */
/** @copyright 2021 MPLv2 */
#include <memory>
#include <list>
#include <string>

/**
* @brief This is the main namespace for all whisper-com related datatypes and classed.
*/
namespace Whisper
{


  /**
  * @brief The namespace for all Tree related datatypes and classes
  */
  namespace Tree
  {

    /**
    * @brief Base class for a Payload used by the Whisper::Serializer
    *
    * This class represents a node in a two way linked tree.
    */
    class Node : public std::enable_shared_from_this<Whisper::Tree::Node>
    {
      private:

        /// the parent node of the node within the tree
        std::shared_ptr<Whisper::Tree::Node> parent_;

        /// all the children of this node
        std::shared_ptr<std::list<std::shared_ptr<Whisper::Tree::Node>>> children_;

      public:

        /**
        * @brief Constructor for just initializing the Node
        */
        Node() : parent_(nullptr),
                 children_(nullptr)
        {
          children_=std::make_shared<std::list<std::shared_ptr<Whisper::Tree::Node>>>();
        }

        /**
        * @brief set the parent of this node
        *
        * @param parent - the parent node
        */
        void parent(std::shared_ptr<Whisper::Tree::Node> parent) {parent_=parent;}

        /**
        * @brief Returns the current set parent of the node
        *
        * @return the parent node
        */
        std::shared_ptr<Whisper::Tree::Node> parent() {return parent_;}

        /**
        * @brief append a child node to the list of children
        *
        * @param child - the child to append
        */
        void appendChild(std::shared_ptr<Whisper::Tree::Node> child)
        {
          children_->push_back(child);
          child->parent(shared_from_this());
        }

        /**
        * @brief prepend a child node to the list of children
        *
        * @param child - the child to prepend
        */
        void prependChild(std::shared_ptr<Whisper::Tree::Node> child)
        {
          children_->push_front(child);
          child->parent(shared_from_this());
        }

        /**
        * @brief return a pointer to the list of children
        *
        * @return shared_ptr of the list of children
        */
        std::shared_ptr<std::list<std::shared_ptr<Whisper::Tree::Node>>> children() { return children_;}

        /**
        * @brief Virtual method returning the type of the node when extended by a class
        *
        * @return type of the Node, in general it is expected to by of type Whisper::PayloadType 
        */
        virtual std::uint32_t type() const { return 0;};

    }; // class Node



  }; // namespace Tree

}; // namespace WHisper