mod raylib;

use raylib::*;

fn main() {
    let screen: Vector2<u32> = Vector2 { x: 800, y: 600 };
    let ball_radius: f32 = 100.0;
    let mut pos: Vector2<f32> = Vector2 {
        x: screen.x as f32 / 2.0,
        y: screen.y as f32 / 2.0,
    };
    let mut velocity: Vector2<f32> = Vector2 { x: 200.0, y: 200.0 };

    init_window(screen.x, screen.y, "Bouncing ball");
    set_target_fps(60);

    while !window_should_close() {
        begin_drawing();
        clear_background(colors::BLACK);
        
        let dt: f32 = get_frame_time();
        velocity.y += dt * 1000.0;

        let x: f32 = pos.x + velocity.x * dt;
        if x - ball_radius < 0.0 || x + ball_radius >= screen.x as f32{
            velocity.x *= -1.0;
        } else {
            pos.x = x;
        }

        let y: f32 = pos.y + velocity.y * dt;
        if y - ball_radius < 0.0 || y + ball_radius >= screen.y as f32 {
            velocity.y *= -1.0;
        } else {
            pos.y = y;
        }

        draw_circle_v(pos, ball_radius, colors::RED);
        end_drawing();
    }
}