//
// Created by martin on 25.03.22.
//

#ifndef ANIMTESTBED_ANIMGRAPH_H
#define ANIMTESTBED_ANIMGRAPH_H

#include "AnimGraphData.h"
#include "AnimGraphNodes.h"

//
// AnimGraph (Runtime)
//
struct AnimGraph {
  AnimData m_local_transforms;

  std::vector<AnimNode*> m_nodes;
  std::vector<AnimNode*> m_eval_ordered_nodes;
  std::vector<std::vector<NodeInput> > m_node_inputs;
  NodeSocketAccessorBase* m_socket_accessor;
  char* m_input_buffer = nullptr;
  char* m_output_buffer = nullptr;

  std::vector<Socket>& getGraphOutputs() { return m_socket_accessor->m_inputs; }
  std::vector<Socket>& getGraphInputs() { return m_socket_accessor->m_outputs; }

  ~AnimGraph() {
    delete[] m_input_buffer;
    delete[] m_output_buffer;

    for (int i = 0; i < m_nodes.size(); i++) {
      delete m_nodes[i];
    }

    delete m_socket_accessor;
  }

  void updateOrderedNodes();
  void markActiveNodes();
  bool checkIsNodeActive(AnimNode* node) {
    return node->m_state != AnimNodeEvalState::Deactivated;
  }
  void evalSyncTracks();
  void updateTime(float dt);
  void evaluate();
  void reset() {
    for (size_t i = 0, n = m_nodes.size(); i < n; i++) {
      m_nodes[i]->m_time_now = 0.f;
      m_nodes[i]->m_time_last = 0.f;
      m_nodes[i]->m_state = AnimNodeEvalState::Undefined;
    }
  }

  void* getOutput(const std::string& name) const;
  void* getInput(const std::string& name) const;

  int getNodeEvalOrderIndex(const AnimNode* node) {
    for (size_t i = 0, n = m_eval_ordered_nodes.size(); i < n; i++) {
      if (m_eval_ordered_nodes[i] == node) {
        return i;
      }
    }

    return -1;
  }
  AnimNode* getAnimNodeForInput(
      size_t node_index,
      const std::string& input_name) {
    assert(node_index < m_nodes.size());
    assert(node_index < m_node_inputs.size());

    std::vector<NodeInput>& node_inputs = m_node_inputs[node_index];
    for (size_t i = 0, n = node_inputs.size(); i < n; i++) {
      if (node_inputs[i].m_input_name == input_name) {
        return node_inputs[i].m_node;
      }
    }

    return nullptr;
  }

  AnimNode* getAnimNode(const char* name) {
    for (size_t i = 0; i < m_nodes.size(); i++) {
      if (m_nodes[i]->m_name == name) {
        return m_nodes[i];
      }
    }

    return nullptr;
  }
};

#endif  //ANIMTESTBED_ANIMGRAPH_H