#include <SDL2/SDL.h>
#include <SDL2/SDL_events.h>
#include <SDL2/SDL_image.h>
#include <SDL2/SDL_render.h>
#include <stdio.h>
#include <iostream>

using namespace std;

//Screen dimension constants
const int SCREEN_WIDTH = 1024;
const int SCREEN_HEIGHT = 768;

enum KeyPressSurfaces
{
    KEY_PRESS_SURFACE_DEFAULT,
    KEY_PRESS_SURFACE_UP,
    KEY_PRESS_SURFACE_DOWN,
    KEY_PRESS_SURFACE_LEFT,
    KEY_PRESS_SURFACE_RIGHT,
    KEY_PRESS_SURFACE_TOTAL
};

int main(int argc, char *argv[]) {
    SDL_Window* window = NULL;

    if (SDL_Init(SDL_INIT_EVERYTHING) < 0) {
        printf("error initializing SDL: %s\n", SDL_GetError());
        return 1;
    }

    window = SDL_CreateWindow( "SDL Tutorial",
                               SDL_WINDOWPOS_UNDEFINED,
                               SDL_WINDOWPOS_UNDEFINED,
                               SCREEN_WIDTH,
                               SCREEN_HEIGHT,
                               SDL_WINDOW_SHOWN );
    if (window == NULL) {
        printf( "Window could not be created! SDL_Error: %s\n", SDL_GetError() );
        return 1;
    }

    SDL_Renderer* renderer =
        SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
    SDL_SetRenderDrawColor(renderer, 130, 163, 255, 1);


    SDL_Surface* fontSurface = IMG_Load("font.png");
    if (fontSurface == NULL) {
        cout << "Could not find spritesheet" << endl;
        return 1;
    }
    SDL_Texture* fontTexture = SDL_CreateTextureFromSurface(renderer, fontSurface);
    // SDL_Surface* screenSurface = NULL;
    // //Get window surface
    // screenSurface = SDL_GetWindowSurface( window );

    //Fill the surface white
    // auto rgbMap = SDL_MapRGB( screenSurface->format, 0x82, 0xA3, 0xFF);

    int test = 0;
    SDL_Event e;
    bool quit = false;
    int keyPressed = -1;
    while (quit == false) {
        while (SDL_PollEvent( &e)) {
            if (e.type == SDL_QUIT) {
                quit = true;
            }
            else if (e.type == SDL_KEYDOWN) {
                char key = e.key.keysym.sym;
                if (key >= (char)'!' || key <= (char)'~') {
                    keyPressed = key;
                }
                // switch (e.key.keysym.sym) {
                //     case SDLK_
                // }
            }
        }

        // SDL_FillRect( screenSurface, NULL, rgbMap);

        SDL_Rect srcrect;
        SDL_Rect dstrect;


        if (keyPressed > 0) {
            srcrect.x = (keyPressed % 16) * 70;
            srcrect.y = (keyPressed / 16) * 80;
        } else {
            srcrect.x = 0;
            srcrect.y = 0;
        }

        srcrect.w = 80;
        srcrect.h = 80;

        dstrect.x = SCREEN_WIDTH/2 - 40;
        dstrect.y = SCREEN_HEIGHT/2 - 40;
        dstrect.w = 100;
        dstrect.h = 100;

        // SDL_BlitSurface(imageSurface, &srcrect, screenSurface, &dstrect);

        //Update the surface
        // SDL_UpdateWindowSurface( window );

        SDL_RenderClear(renderer);

        SDL_RenderCopy(renderer, fontTexture, &srcrect, &dstrect);

        SDL_RenderPresent(renderer);
    }

    
    //Hack to get window to stay up
    // SDL_FreeSurface(screenSurface);
    SDL_FreeSurface(fontSurface);
    SDL_DestroyTexture(fontTexture);
    SDL_DestroyRenderer(renderer);
    SDL_DestroyWindow( window );

    //Quit SDL subsystems
    SDL_Quit();
    return 0;
}