/*
 * 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/.
 */

#include "Scene/SequenceAnimationController.hpp"

namespace OpenVulkano::Scene
{
	SequenceAnimationController::SequenceAnimationController()
	{
		// m_animationController.m_completionEvent += EventHandler(this, &SequenceAnimationController::OnCurrentFrameFinished); 
		m_completionEvent += EventHandler(this, &SequenceAnimationController::OnCurrentFrameFinished);
	}

	void SequenceAnimationController::AdvanceToNextStep()
	{
		if(m_steps.empty())
			return;

		if(m_currentStep < m_steps.size() - 1)
		{
			++m_currentStep;
			SetPoses(GetTargetPose(), m_steps[m_currentStep].first);
			SetDuration(m_steps[m_currentStep-1].second);
			SimpleAnimationController::Reset();
		}
		else
		{
			if(m_loop)
			{
				m_currentStep = 0;
				SetPoses(GetTargetPose(), m_steps[m_currentStep].first);
				// We don't set the duration because transition from the last step to the first
				// requires to use duration of the last step
				SimpleAnimationController::Reset();
			}
			else
			{
				m_sequenceCompletionEvent.NotifyAll(this);
			}
		}
	}

	void SequenceAnimationController::Tick()
	{
		SimpleAnimationController::Tick();
	}
	
	void SequenceAnimationController::Restart()
	{
		m_currentStep = 0;
		if(!m_steps.empty())
		{
			SetPoses(GetTargetPose(), m_steps[m_currentStep].first);
			SetDuration(m_steps.back().second);
		}
		SimpleAnimationController::Reset();
	}

	void SequenceAnimationController::AddAnimationStep(const Math::PoseF &pose, double duration)
	{
		m_steps.emplace_back(pose, duration);
		if(m_steps.size() == 2)
		{
			m_currentStep = 1;
			SetPoses(m_steps[0].first, m_steps[1].first);
			SetDuration(m_steps[0].second);
			Reset();
		}
	}

	void SequenceAnimationController::OnCurrentFrameFinished(SimpleAnimationController *animationController)
	{
		AdvanceToNextStep();
	}
}