#include <SFML/Graphics.hpp>


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

struct Segment {
    int y;
    int x;
    int z;
    int width;
};
struct Road {
    int height; //number of elements
    struct Segment *segments; //array of segments
    float playerx;
    int width;
};

void gen_road(struct Road* road) {
    int v = road->height;
    for (int i = 1;i <= road->height;i++) {
        road->segments[i - 1].width = road->width;
        road->segments[i - 1].z = i;
        road->segments[i - 1].y = 100;
        road->segments[i - 1].x = 0;
        v--;
    }
}

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].width - v*2;
        sf::RectangleShape rs(sf::Vector2f(s, 20)); //makes a rectangle of width s and height 20
        rs.setFillColor(gray);
        rs.setOutlineThickness(1);
        rs.setOutlineColor(sf::Color(250, 150, 100));
        int xoffset = ( (road->segments[v].x + 192) - s / 2) - (road->playerx * s); //displayed x position of rectangle (based on z and x axis)
        int yoffset = road->segments[v].y - road->segments[v].z; //displayed y position of rectangle (based on z and y axis)
        rs.setPosition( xoffset , yoffset);
        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.width = 100;
    road.segments = (struct Segment*)malloc(road.height * sizeof(struct Segment));
    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;
                }
                else if (event.key.code == sf::Keyboard::W)
                {
                    for (int i = 0;i < road.height;i++) {
                        road.segments[i].x -= 10;
                    }
                }
                else if (event.key.code == sf::Keyboard::S)
                {
                    for (int i = 0;i < road.height;i++) {
                        road.segments[i].x += 10;
                    }
                }
            }
        }
        window.clear(sf::Color::Black);
        draw_road(&window, &road);
        window.display();
    }
}