#ifndef GUI_TextureFrame_h__
#define GUI_TextureFrame_h__

#include "GUI/Frame.h"
#include "Texture.h"

namespace GUI
{

class TextureFrame : public Frame
{
public:
	TextureFrame(Frame* parent, std::string name)
		: Frame(parent, name)
		, m_Texture(nullptr)
		, m_FadeTexture(nullptr)
		, m_Color(glm::vec4(1.f, 1.f, 1.f, 1.f))
		, m_FadeDuration(0.f)
		, m_CurrentFade(1.f)
	{ }

	void Draw(std::shared_ptr<Renderer> renderer) override
	{
		if (m_Texture == nullptr)
			return;

		RenderQueue.Clear();

		// Main texture
		{
			SpriteJob job;
			job.TextureID = m_Texture->ResourceID;
			job.Texture = *m_Texture;
			job.Color = glm::vec4(m_Color.r, m_Color.g, m_Color.b, m_Color.a * m_CurrentFade);
			RenderQueue.Forward.Add(job);
		}

		// Texture while fading
		if (m_FadeTexture && m_CurrentFade < 1)
		{
			SpriteJob job;
			job.TextureID = m_FadeTexture->ResourceID;
			job.Texture = *m_FadeTexture;
			job.Color = glm::vec4(m_Color.r, m_Color.g, m_Color.b, m_Color.a);
			RenderQueue.Forward.Add(job);
		}

		renderer->SetCamera(nullptr);
		renderer->SetViewport(Rectangle(Left(), Top(), Width, Height));
		renderer->DrawFrame(RenderQueue);
	}

	::Texture* Texture() const { return m_Texture; }
	void SetTexture(std::string resourceName)
	{
		m_Texture = ResourceManager->Load<::Texture>("Texture", resourceName);
	}

	void FadeToTexture(std::string resourceName, double duration)
	{
		m_FadeTexture = m_Texture;
		SetTexture(resourceName);
		m_FadeDuration = duration;
		m_CurrentFade = 0.f;
	}

	void Update(double dt) override
	{
		if (m_CurrentFade < 1)
		{
			m_CurrentFade += dt / m_FadeDuration;
			if (m_CurrentFade > 1)
			{
				m_FadeTexture = nullptr;
				m_CurrentFade = 1;
				m_FadeDuration = 0;
			}
		}
	}

	glm::vec4 Color() const { return m_Color; }
	void SetColor(glm::vec4 val) { m_Color = val; }

protected:
	::Texture* m_Texture;
	::Texture* m_FadeTexture;
	glm::vec4 m_Color;
	float m_FadeDuration;
	float m_CurrentFade;
	
};

}

#endif // GUI_TextureFrame_h__