#include <stdio.h>
#include <stdbool.h>
#include <SDL2/SDL.h>
#include <SDL2/SDL_timer.h>
#include <SDL_image.h>


#define WINDOW_WIDTH (640)
#define WINDOW_HEIGHT (480)
// Speed in Pixels/Seconds
#define SCROLL_SPEED (300)

// Spirte Size
#define SPRITE_SIZE    32


int main(int argc, const char * argv[]) {

// Attempt to initialize graphics library
if (SDL_Init(SDL_INIT_VIDEO) != 0) {
    SDL_Log("Unable to initialize SDL: %s", SDL_GetError());
    return 1;
}

//Initialize Key Variables
SDL_Window *window = NULL;
SDL_Renderer *renderer = NULL;
SDL_Surface *windowSurface = NULL;
SDL_Surface *imageSurface = NULL;



// Creating Surfaces and Addresses
SDL_Surface *temp = NULL;
SDL_Surface *sprite = NULL;
SDL_Rect dstSprite;

// set sprite position
dstSprite.x = 0;
dstSprite.y = 0;
dstSprite.w = 32;
dstSprite.h = 32;


// Attempt to create SDL Window
window = SDL_CreateWindow("Atari Lunar Lander", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, WINDOW_WIDTH, WINDOW_HEIGHT, 0);

// Print an Error if the window fails to initialize
if (window == NULL) {
    printf("Could not create window: %sn", SDL_GetError());
    return 1;
}

// Create The Title of the Window
SDL_SetWindowTitle(window, "Atari Lunar Lander");

// Create SDL Render Window
Uint32 render_flags = SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC | SDL_RENDERER_TARGETTEXTURE;
renderer = SDL_CreateRenderer(window, -1, render_flags);

// if rendering the window fails
if (!renderer) {
    printf("error creating render: %sn", SDL_GetError());
    SDL_DestroyWindow(window);
    SDL_Quit();
    return 1;
}

windowSurface = SDL_GetWindowSurface(window);

// Load A bitmap image as an Surface
windowSurface = SDL_LoadBMP("/Users/jeremiahonwubuya/Desktop/AtariLunarLander/outerspace.bmp");

if (!windowSurface) {
    printf("error creating surface: %sn", SDL_GetError());
    SDL_DestroyRenderer(renderer);
    SDL_DestroyWindow(window);
    SDL_Quit();
    return 1;
}

//Load Image data into graphics hardware memory
SDL_Texture *texture = SDL_CreateTextureFromSurface(renderer, windowSurface);


if (!texture) {
    printf("error creating texture: %sn", SDL_GetError());
    SDL_DestroyRenderer(renderer);
    SDL_DestroyWindow(window);
    SDL_Quit();
    return 1;
}


// load bitmap image into an SDL_Surface "temp" and store "temp" into the SDL_Surface "sprite" that is optimized for Blitting
temp   = SDL_LoadBMP("/Users/jeremiahonwubuya/Desktop/AtariLunarLander/player.bmp");
sprite = SDL_ConvertSurface(temp, temp->format, 0);
SDL_FreeSurface(temp);

SDL_Texture *playerTexture = SDL_CreateTextureFromSurface(renderer, sprite);


if (!sprite) {
    printf("error creating sprite: %sn", SDL_GetError());
    SDL_DestroyRenderer(renderer);
    SDL_DestroyWindow(window);
    SDL_Quit();
    return 1;
}



// updating the Window Surface to be the BitMap Image
SDL_RenderClear(renderer);
SDL_RenderCopy(renderer, texture, NULL, NULL);
SDL_RenderCopy(renderer, playerTexture, NULL, &dstSprite);
SDL_RenderPresent(renderer);



bool isRunning = true;
SDL_Event event;

while (isRunning) {

    while (SDL_PollEvent(&event) != 0 ) {
        if (event.type == SDL_QUIT) {
            // close button clicked
            isRunning = false;
            break;
        }

        if (event.type == SDL_KEYDOWN) {
            // close program upon buttons pressed
            switch(event.key.keysym.sym){
                case SDLK_q:
                    printf("program stopped");
                    isRunning = false;
                    break;
                case SDLK_ESCAPE:
                    printf("programm stopped");
                    isRunning = false;
                    break;

                // Animating the Sprite

                case SDLK_LEFT | SDLK_a:
                    dstSprite.x -= 5;
                    printf("sprite moved leftt");
                    break;
                case SDLK_RIGHT | SDLK_d:
                    dstSprite.x += 5;
                     printf("sprite moved right");
                    break;
                case SDLK_UP | SDLK_w:
                    dstSprite.y -= 5;
                     printf("sprite moved up");
                    break;
                case SDLK_DOWN | SDLK_s:
                    dstSprite.y += 5;
                    printf("sprite moved down");
                    break;

            }

        }


        // Prevent Sprite from colliding with the edges of the screen

        if ( dstSprite.x < 0 ) {
            dstSprite.x = 0;
        }
        else if ( dstSprite.x > WINDOW_WIDTH-SPRITE_SIZE ) {
            dstSprite.x = WINDOW_WIDTH-SPRITE_SIZE;
        }
        if ( dstSprite.y < 0 ) {
            dstSprite.y = 0;
        }
        else if ( dstSprite.y > WINDOW_HEIGHT-SPRITE_SIZE ) {
            dstSprite.y = WINDOW_HEIGHT-SPRITE_SIZE;
        }


        // Draw the Sprite
       SDL_BlitSurface(sprite, NULL, windowSurface, &dstSprite);


      SDL_UpdateWindowSurface(window);
    }

}


SDL_Delay(5000);

 // Clean Up

 // Free SDL Surfaces
 SDL_FreeSurface(sprite);
 sprite = NULL;
 SDL_FreeSurface(windowSurface);
 windowSurface = NULL;
 SDL_FreeSurface(imageSurface);
 imageSurface = NULL;
 // Destroy Texture and Window
 texture = NULL;
 SDL_DestroyTexture(texture);
 playerTexture = NULL;
 SDL_DestroyTexture(playerTexture);
 window = NULL;
 SDL_DestroyWindow(window);
 SDL_Quit();

}