#include <stdio.h>
#include <SDL.h>

int main(int argc, char **argv){
    SDL_Rect b0 = {10, 103, 10, 50};    //x, y, w, h
    SDL_Rect b1 = {246, 103, -10, 50};
    SDL_Rect ball = {123, 123, 10, 10};

    int xv = 2;
    int yv = 2;
    int p1 = 0;
    int p2 = 0;

    SDL_Window *window;     // Declaring window
    SDL_Renderer *renderer; // Declaring renderer

    SDL_Init(SDL_INIT_VIDEO); // Initialize SDL video

    window = SDL_CreateWindow("G A M E", //windown name               Initializing window
        SDL_WINDOWPOS_UNDEFINED,         //window position
        SDL_WINDOWPOS_UNDEFINED,         //window position
        256,                             //window width
        256,                             //window height
        0);                              //flags

    renderer = SDL_CreateRenderer(window,                  // pointer to window
    -1,                                                    // index
    SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC); // flags

    SDL_SetRenderDrawColor(renderer, 0, 0, 255, 255); // Set renderers draw colour to blue

    SDL_RenderClear(renderer); // Clear renderer to blue screen
    SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255); // Set renderers draw colour to white

    int done = 0;
    SDL_Event event;
    while(done == 0){
        while(SDL_PollEvent(&event)){
            switch(event.type){
                case SDL_WINDOWEVENT_CLOSE:
                    if (window){
                        SDL_DestroyWindow(window);
                        window = NULL;
                        done = 1;
                    }
                break;
                case SDL_QUIT:
                    done = 1;
                break;
                case SDL_KEYDOWN:
                    switch(event.key.keysym.sym){
                        case SDLK_ESCAPE:
                            done = 1;
                        break;
                        case SDLK_DELETE:
                            done = 1;
                        break;
                    }
                break;
            }
        }

        const Uint8 *keyboard = SDL_GetKeyboardState(NULL);
        if (keyboard[SDL_SCANCODE_W]) b0.y -= (((unsigned) b0.y - 5) > 256) ? 0 : 5;
        if (keyboard[SDL_SCANCODE_S]) b0.y += ((b0.y + 55) > 256) ? 0 : 5;

        if (keyboard[SDL_SCANCODE_UP]) b1.y -= (((unsigned) b1.y - 5) > 256) ? 0 : 5;
        if (keyboard[SDL_SCANCODE_DOWN]) b1.y += ((b1.y + 55) > 256) ? 0 : 5;

        //code for ball
        if((((unsigned) ball.y + yv) > 256) || (((unsigned) ball.y + 10 + yv) > 256)) yv *= -1; //bouncing off of top/bottom wall
        else if(((unsigned) ball.x + xv) > 256) {p2++; ball.x = 123; ball.y = 123; xv *= -1;}
        else if(((unsigned) ball.x + 10 + xv) > 256) {p1++; ball.x = 123; ball.y = 123; xv *= -1;}
        else if(((ball.y > b0.y && ball.y < b0.y + b0.h) || (ball.y + ball.h > b0.y && ball.y + ball.h < b0.y + b0.h)) && ((ball.x > b0.x && ball.x + ball.w < b0.x + b0.w) || (ball.x > b0.x && ball.x < b0.x + b0.w))) {xv *= -1; puts("b0\n");} //b0 hit detection
        else if((((ball.y > b1.y) && (ball.y < b1.y + b1.h)) || ((ball.y + ball.h > b1.y) && (ball.y + ball.h < b1.y + b1.h))) && (((ball.x > b1.x + b1.w) && (ball.x < b1.x)) || ((ball.x + ball.w > b1.x + b1.w) && (ball.x + ball.w < b1.x)))) {xv *= -1; puts("b1\n");} //b1 hit detection

        ball.x += xv;
        ball.y += yv;

        SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255); // Set renderers draw colour to black

        SDL_RenderClear(renderer); // Clear renderer to black screen
        SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255); // Set renderers draw colour to white

        SDL_RenderFillRect(renderer, &b0);  // Fill rectangle with white
        SDL_RenderFillRect(renderer, &b1);  // Fill rectangle with white
        SDL_RenderFillRect(renderer, &ball);  // Fill rectangle with white

        SDL_RenderPresent(renderer); // Present
        printf("P1: %d\nP2: %d\n", p1, p2);



        SDL_Delay(1000 / 60000); // Wait 1/60 seconds
    }

    // Destroy window/renderer
    SDL_DestroyRenderer(renderer);
    SDL_DestroyWindow(window);

    // Clean up
    SDL_Quit();

    // Return
    return 0;
}