#include <SFML/Graphics.hpp>
#include <stdio.h>      /* printf, scanf, puts, NULL */
#include <stdlib.h>     /* srand, rand */
#include <time.h>

sf::Color gray = sf::Color(211, 211, 211);

struct Road {
    int height; //number of elements
    int *segments; //holds width of each element
    float playerx;
};

void gen_road(struct Road* road) {
    int base_width = 100; //width of the bottom element
    for (int y = 1;y <= road->height;y++) {
        int z = base_width - y*4; //decreases width by 4 each time
        road->segments[y - 1] = z;
    }
}

void draw_road(sf::RenderWindow *window, struct Road* road) {
    int i = 0;
    for (int v = road->height-1;v > 0;v--) { //draws each rectangle from furthest to closest
        int s = road->segments[v];
        sf::RectangleShape rs(sf::Vector2f(s, 30)); //makes a rectangle of width s and height 30
        rs.setFillColor(gray);
        rs.setOutlineThickness(1);
        rs.setOutlineColor(sf::Color(250, 150, 100));
        int x = ( (384 - s) / 2 ) - (road->playerx * s); //sets position of rectangle relative to x position and to position in segments array
        rs.setPosition( x , i*10); //where i is the index of the rectangle in the segments array
        window->draw(rs); //displays the rectangle
        i++;
    }
}

int main() {
    sf::RenderWindow window(sf::VideoMode(384, 216), "KraD");
    struct Road road;
    road.height = 20;
    road.playerx = 0;
    road.segments = (int*)malloc(road.height * sizeof(int));
    gen_road(&road);
    while (window.isOpen())
    {
        sf::Event event;
        while (window.pollEvent(event)) {
            if (event.type == sf::Event::Closed) {
                window.close();
            }
            if (event.type == sf::Event::KeyPressed)
            {
                if (event.key.code == sf::Keyboard::D)
                {
                    road.playerx -= 0.1;
                }
                else if (event.key.code == sf::Keyboard::A)
                {
                    road.playerx += 0.1;
                }
            }
        }
        window.clear(sf::Color::Black);
        draw_road(&window, &road);
        window.display();
    }
}