#include "imgui.h"
#include "imgui_impl_sdl3.h"
#include "imgui_impl_sdlrenderer3.h"
#include <cstdlib>
#include <SDL3/SDL.h>

#include "editor.hpp"

SDL_Window *window = nullptr;
SDL_Renderer *renderer = nullptr;

void quit(int code)
{
	editor_quit();

	ImGui_ImplSDLRenderer3_Shutdown();
	ImGui_ImplSDL3_Shutdown();
	ImGui::DestroyContext();

	if (window) SDL_DestroyRenderer(renderer);
	if (renderer) SDL_DestroyWindow(window);
	SDL_Quit();

	exit(code);
}

void die(const char *fmt, ...)
{
	va_list ap;

	va_start(ap, fmt);
	SDL_LogMessageV(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_ERROR, fmt, ap);
	va_end(ap);

	quit(1);
}

int main(int argc, char **argv)
{
	if (!SDL_Init(SDL_INIT_VIDEO | SDL_INIT_GAMEPAD))
		die("Error: SDL_Init(): %s", SDL_GetError());

	window = SDL_CreateWindow("Yeti3D World Editor", 1280, 720, SDL_WINDOW_RESIZABLE | SDL_WINDOW_HIDDEN | SDL_WINDOW_MAXIMIZED);
	if (!window)
		die("Error: SDL_CreateWindow(): %s", SDL_GetError());

	renderer = SDL_CreateRenderer(window, nullptr);
	SDL_SetRenderVSync(renderer, 1);
	if (!renderer)
		die("Error: SDL_CreateRenderer(): %s", SDL_GetError());

	SDL_SetWindowPosition(window, SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED);
	SDL_ShowWindow(window);

	IMGUI_CHECKVERSION();
	ImGui::CreateContext();
	ImGuiIO &io = ImGui::GetIO();
	io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;
	io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad;
	io.IniFilename = nullptr;
	io.LogFilename = nullptr;

	ImGui::StyleColorsDark();

	ImGui_ImplSDL3_InitForSDLRenderer(window, renderer);
	ImGui_ImplSDLRenderer3_Init(renderer);

	ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);

	editor_init();

	while (true)
	{
		SDL_Event event;

		while (SDL_PollEvent(&event))
		{
			ImGui_ImplSDL3_ProcessEvent(&event);
			if (event.type == SDL_EVENT_QUIT)
				quit(0);
			if (event.type == SDL_EVENT_WINDOW_CLOSE_REQUESTED && event.window.windowID == SDL_GetWindowID(window))
				quit(0);
		}

		if (SDL_GetWindowFlags(window) & SDL_WINDOW_MINIMIZED)
		{
			SDL_Delay(10);
			continue;
		}

		ImGui_ImplSDLRenderer3_NewFrame();
		ImGui_ImplSDL3_NewFrame();
		ImGui::NewFrame();

		editor_main();

		ImGui::Render();
		SDL_SetRenderScale(renderer, io.DisplayFramebufferScale.x, io.DisplayFramebufferScale.y);
		SDL_SetRenderDrawColorFloat(renderer, clear_color.x, clear_color.y, clear_color.z, clear_color.w);
		SDL_RenderClear(renderer);
		ImGui_ImplSDLRenderer3_RenderDrawData(ImGui::GetDrawData(), renderer);
		SDL_RenderPresent(renderer);
	}

	quit(0);

	return 0;
}