#pragma once

#include <SDL.h>
#include <imgui.h>
#include "../std.hpp"
#include "../time.hpp"

/// converts hex color to float vector
#define RGBAHexToF(R8,G8,B8,A8) ImVec4(((u8)35)/255.0f, ((u8)35)/255.0f, ((u8)50)/255.0f, ((u8)255)/255.0f)
/// converts float vector to hex color
#define RGBAFToHex(VEC4) {(u8)(VEC4.x*255), (u8)(VEC4.y*255), (u8)(VEC4.z*255), (u8)(VEC4.w*255)}

namespace ougge::GUI {

#define default_font "DroidSans"

using UpdatingFunc = void (*)(f64 deltaTime);

class MainWindow {
public:
    ImVec4 clear_color = RGBAHexToF(35,35,50,255);
    f32 default_font_size = 14.0f;
    int fps_max = 60;
    // called on each frame
    UpdatingFunc update = nullptr;

private:
    bool loop_running = false;
    bool show_demo_window = false;
    bool show_metrics_window = false;
    SDL_Window* sdl_window = nullptr;
    SDL_Renderer* sdl_renderer = nullptr;

public:
    void open(const char* window_title, UpdatingFunc update);
    void startUpdateLoop();
    void close();

private:
    void destroy();
    f32 getDPI();
    void poll_events(bool waitForEvent);
    void draw_frame();
    void draw_ui();
    void draw_debug_window();
    void draw_bg_window();
};

}