#include <cstdint>
#include <cstdlib>
#include <string>
#include <iostream>

#include <SDL.h>
#include <stdint.h>

static void draw(SDL_Window *gWindow, SDL_Surface *globalImage,
		SDL_Surface *globalScreenSurface) {

	if (EXIT_SUCCESS != SDL_BlitSurface(globalImage, nullptr, globalScreenSurface, nullptr)) {
		std::cerr << "SDL_BlitSurface() failed. Reason: " << SDL_GetError() << std::endl;
	}

	if (EXIT_SUCCESS != SDL_UpdateWindowSurface(gWindow)) {
		std::cerr << "SDL_UpdateWindowSurface() failed. Reason: " << SDL_GetError()
				<< std::endl;
	}
	SDL_Delay(5000);
}

static int32_t loadResources(SDL_Surface *globalImage) {
	const std::string filePath = "../resources/hello.bmp";
	globalImage = SDL_LoadBMP(filePath.c_str());
	if (globalImage == nullptr) {
		std::cerr << "SDL_LoadBMP() failed. Reason: " << SDL_GetError() << std::endl;
		return EXIT_FAILURE;
	}
	return EXIT_SUCCESS;
}

static int32_t init(SDL_Window *gWindow, SDL_Surface *globalScreenSurface,
		SDL_Surface *globalImage) {
	if (EXIT_SUCCESS != SDL_Init(SDL_INIT_VIDEO)) {
		std::cerr << "SDL_Init() failed. Reason: " << SDL_GetError() << std::endl;
		return EXIT_FAILURE;
	}
	const std::string windowName = "First window";
	const int windowHeight = 800;
	const int windowWidth = 600;

	gWindow = SDL_CreateWindow(windowName.c_str(),
	SDL_WINDOWPOS_UNDEFINED,
	SDL_WINDOWPOS_UNDEFINED, windowHeight, windowWidth, SDL_WINDOW_SHOWN);
	if (gWindow == nullptr) {
		std::cerr << "SDL_CreateWindow() failed. Reason: " << SDL_GetError() << std::endl;
	}
	globalScreenSurface = SDL_GetWindowSurface(gWindow);
	if (globalScreenSurface == nullptr) {
		std::cerr << "SDL_GetWindowSurface() failed. Reason: " << SDL_GetError() << std::endl;
	}
	if (EXIT_SUCCESS != loadResources(globalImage)) {
		std::cerr << "loadResources() failed." << std::endl;
		return EXIT_FAILURE;
	}
	return EXIT_SUCCESS;
}

void deinit(SDL_Surface *globalImage, SDL_Window *gWindow) {
	SDL_FreeSurface(globalImage);
	if (gWindow != nullptr) {
		SDL_DestroyWindow(gWindow);
		gWindow = nullptr;
	}
	SDL_Quit();
}

int32_t main([[maybe_unused]]int32_t argc, [[maybe_unused]]char *argv[]) {

	SDL_Window *gWindow = nullptr;
	SDL_Surface *globalScreenSurface = nullptr;
	SDL_Surface *globalImage = nullptr;

	if (EXIT_SUCCESS != init(gWindow, globalScreenSurface, globalImage)) {
		std::cerr << "init() failed" << std::endl;
		return EXIT_FAILURE;
	}

	draw(gWindow, globalScreenSurface, globalImage);

	deinit(globalImage, gWindow);

	return EXIT_SUCCESS;
}