#include "imgui/imgui.h"
#include "imgui/imgui_internal.h"
#include "Renderer.h"

Renderer* Renderer::m_pInstance;

Renderer::Renderer()
{
}

Renderer::~Renderer()
{
}

void Renderer::Initialize()
{
	ImGuiIO& io = ImGui::GetIO();


}

void Renderer::BeginScene()
{
	ImGui::PushStyleColor(ImGuiCol_WindowBg, ImVec4(0.0f, 0.0f, 0.0f, 0.0f));
	ImGui::Begin("BackBuffer", reinterpret_cast<bool*>(true), ImVec2(0, 0), 0.0f, ImGuiWindowFlags_NoTitleBar | ImGuiWindowFlags_NoInputs);

	ImGui::SetWindowPos(ImVec2(0, 0), ImGuiSetCond_Always);
	ImGui::SetWindowSize(ImVec2(ImGui::GetIO().DisplaySize.x, ImGui::GetIO().DisplaySize.y), ImGuiSetCond_Always);
}

void Renderer::DrawScene()
{
	ImGuiIO& io = ImGui::GetIO();

}

void Renderer::EndScene()
{
	ImGuiWindow* window = ImGui::GetCurrentWindow();
	window->DrawList->PushClipRectFullScreen();

	ImGui::End();
	ImGui::PopStyleColor();
}



void Renderer::DrawLine(const ImVec2& from, const ImVec2& to, uint32_t color, float thickness)
{
	ImGuiWindow* window = ImGui::GetCurrentWindow();

	float a = (color >> 24) & 0xff;
	float r = (color >> 16) & 0xff;
	float g = (color >> 8) & 0xff;
	float b = (color) & 0xff;

	window->DrawList->AddLine(from, to, ImGui::GetColorU32(ImVec4(r / 255, g / 255, b / 255, a / 255)), thickness);
}

void Renderer::DrawCircle(const ImVec2& position, float radius, uint32_t color, float thickness)
{
	ImGuiWindow* window = ImGui::GetCurrentWindow();

	float a = (color >> 24) & 0xff;
	float r = (color >> 16) & 0xff;
	float g = (color >> 8) & 0xff;
	float b = (color) & 0xff;

	window->DrawList->AddCircle(position, radius, ImGui::GetColorU32(ImVec4(r / 255, g / 255, b / 255, a / 255)), 12, thickness);
}

void Renderer::DrawCircleFilled(const ImVec2& position, float radius, uint32_t color)
{
	ImGuiWindow* window = ImGui::GetCurrentWindow();

	float a = (color >> 24) & 0xff;
	float r = (color >> 16) & 0xff;
	float g = (color >> 8) & 0xff;
	float b = (color) & 0xff;

	window->DrawList->AddCircleFilled(position, radius, ImGui::GetColorU32(ImVec4(r / 255, g / 255, b / 255, a / 255)), 12);
}

Renderer* Renderer::GetInstance()
{
	if (!m_pInstance)
		m_pInstance = new Renderer();

	return m_pInstance;
}