#include "glUserInterface.h"

#include "Input/KeyCodes.h"

#include <GLFW/glfw3.h>

#include <imgui.h>
#include <backends/imgui_impl_glfw.h>
#include <backends/imgui_impl_opengl3.h>

namespace Light {

	void glUserInterface::PlatformImplementation(GLFWwindow* windowHandle, Ref<SharedContext> sharedContext)
	{
		m_WindowHandle = windowHandle;

		ImGui_ImplGlfw_InitForOpenGL(windowHandle, false);
		ImGui_ImplOpenGL3_Init();
	}

	glUserInterface::~glUserInterface()
	{
		// #todo: handle this in a better way
		ImGuiIO& io = ImGui::GetIO();

		if (io.IniFilename == "default_gui_layout.ini")
			io.IniFilename = "user_gui_layout.ini";

		ImGui_ImplOpenGL3_Shutdown();
		ImGui_ImplGlfw_Shutdown();
		ImGui::DestroyContext();
	}

	void glUserInterface::Begin()
	{
		ImGui_ImplOpenGL3_NewFrame();
		ImGui_ImplGlfw_NewFrame();
		ImGui::NewFrame();
	}

	void glUserInterface::End()
	{
		ImGui::Render();
		ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());

		ImGui::UpdatePlatformWindows();
		ImGui::RenderPlatformWindowsDefault();
		glfwMakeContextCurrent(m_WindowHandle);
	}

	void glUserInterface::LogDebugData()
	{
		// #todo: improve
		LT_ENGINE_INFO("________________________________________");
		LT_ENGINE_INFO("UserInterface::");
		LT_ENGINE_INFO("       API    : ImGui");
		LT_ENGINE_INFO("       Version: {}", ImGui::GetVersion());
		LT_ENGINE_INFO("  GraphicsAPI : OpenGL");
		LT_ENGINE_INFO("________________________________________");
	}

}