//
//  KRAnimationManager.cpp
//  Kraken Engine
//
//  Copyright 2026 Kearwood Gilbert. All rights reserved.
//
//  Redistribution and use in source and binary forms, with or without modification, are
//  permitted provided that the following conditions are met:
//
//  1. Redistributions of source code must retain the above copyright notice, this list of
//  conditions and the following disclaimer.
//
//  2. Redistributions in binary form must reproduce the above copyright notice, this list
//  of conditions and the following disclaimer in the documentation and/or other materials
//  provided with the distribution.
//
//  THIS SOFTWARE IS PROVIDED BY KEARWOOD GILBERT ''AS IS'' AND ANY EXPRESS OR IMPLIED
//  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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//

#include "KRAnimationManager.h"
#include "KRAnimation.h"

KRAnimationManager::KRAnimationManager(KRContext& context) : KRResourceManager(context)
{

}

KRAnimationManager::~KRAnimationManager()
{
  for (std::set<KRAnimation*>::iterator itr = m_activeAnimations.begin(); itr != m_activeAnimations.end(); itr++) {
    KRAnimation* animation = *itr;
    animation->_unlockData();
  }

  for (unordered_map<std::string, KRAnimation*>::iterator itr = m_animations.begin(); itr != m_animations.end(); ++itr) {
    delete (*itr).second;
  }
}

void KRAnimationManager::startFrame(float deltaTime)
{
  for (std::set<KRAnimation*>::iterator itr = m_animationsToUpdate.begin(); itr != m_animationsToUpdate.end(); itr++) {
    KRAnimation* animation = *itr;
    std::set<KRAnimation*>::iterator active_animations_itr = m_activeAnimations.find(animation);
    if (animation->isPlaying()) {
      // Add playing animations to the active animations list
      if (active_animations_itr == m_activeAnimations.end()) {
        m_activeAnimations.insert(animation);
        animation->_lockData();
      }
    } else {
      // Remove stopped animations from the active animations list
      if (active_animations_itr != m_activeAnimations.end()) {
        m_activeAnimations.erase(active_animations_itr);
        animation->_unlockData();
      }
    }
  }

  m_animationsToUpdate.clear();

  for (std::set<KRAnimation*>::iterator active_animations_itr = m_activeAnimations.begin(); active_animations_itr != m_activeAnimations.end(); active_animations_itr++) {
    KRAnimation* animation = *active_animations_itr;
    animation->update(deltaTime);
  }
}

void KRAnimationManager::endFrame(float deltaTime)
{

}

KRResource* KRAnimationManager::loadResource(const std::string& name, const std::string& extension, mimir::Block* data)
{
  if (extension.compare("kranimation") == 0) {
    return loadAnimation(name.c_str(), data);
  }
  return nullptr;
}
KRResource* KRAnimationManager::getResource(const std::string& name, const std::string& extension)
{
  if (extension.compare("kranimation") == 0) {
    return getAnimation(name.c_str());
  }
  return nullptr;
}

KRAnimation* KRAnimationManager::loadAnimation(const char* szName, mimir::Block* data)
{
  KRAnimation* pAnimation = KRAnimation::Load(*m_pContext, szName, data);
  addAnimation(pAnimation);
  return pAnimation;
}

KRAnimation* KRAnimationManager::getAnimation(const char* szName)
{
  return m_animations[szName];
}

unordered_map<std::string, KRAnimation*>& KRAnimationManager::getAnimations()
{
  return m_animations;
}

void KRAnimationManager::addAnimation(KRAnimation* new_animation)
{
  m_animations[new_animation->getName()] = new_animation;
  updateActiveAnimations(new_animation);
}

void KRAnimationManager::updateActiveAnimations(KRAnimation* animation)
{
  m_animationsToUpdate.insert(animation);
}

void KRAnimationManager::deleteAnimation(KRAnimation* animation, bool delete_curves)
{
  if (delete_curves) {
    animation->deleteCurves();
  }
  m_animations.erase(animation->getName());
  delete animation;
}
