#include "imgui_context.hpp"

#include <imgui/imgui_impl_opengl3.h>
#include <imgui/imgui_impl_sdl2.h>

namespace bookmouse {

ImguiContext::ImguiContext(GlContext& glContext, SdlContext& sdlContext, SdlMainWindow& mainWindow) :
    m_mainWindow(mainWindow)
{
    IMGUI_CHECKVERSION();
    ImGui::CreateContext();

    setIOFlag(ImGuiConfigFlags_NavEnableKeyboard);
    setIOFlag(ImGuiConfigFlags_NavEnableGamepad);

    ImGui::StyleColorsDark();
    // ImGui::StyleColorsLight();

    ImGui_ImplSDL2_InitForOpenGL(mainWindow.window(), glContext.context());
    ImGui_ImplOpenGL3_Init(sdlContext.glslVersion());
}

ImguiContext::~ImguiContext()
{
    ImGui_ImplOpenGL3_Shutdown();
    ImGui_ImplSDL2_Shutdown();
    ImGui::DestroyContext();
}

void ImguiContext::setIOFlag(ImGuiConfigFlags_ flag) const
{
    ImGui::GetIO().ConfigFlags |= flag;
}

const ImGuiIO& ImguiContext::getIO() const
{
    return ImGui::GetIO();
}

bool ImguiContext::processEvent(SDL_Event& event) const
{
    return ImGui_ImplSDL2_ProcessEvent(&event);
}

void ImguiContext::startFrame() const
{
    ImGui_ImplOpenGL3_NewFrame();
    ImGui_ImplSDL2_NewFrame();
    ImGui::NewFrame();
}

void ImguiContext::render() const
{
    ImGui::Render();
    ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
    SDL_GL_SwapWindow(m_mainWindow.window());
}

} // namespace bookmouse