extern crate minifb;

use minifb::{MouseButton, MouseMode, Window, Key, Scale, WindowOptions};

const WIDTH: usize = 640;
const HEIGHT: usize = 360;

fn main() {
    let mut buffer: Vec<u32> = vec![0; WIDTH * HEIGHT];

    let mut window = match Window::new("Mouse Draw - Press ESC to exit", WIDTH, HEIGHT,
                                       WindowOptions {
                                           scale: Scale::X2,
                                           ..WindowOptions::default()
                                       }) {
        Ok(win) => win,
        Err(err) => {
            println!("Unable to create window {}", err);
            return;
        }
    };

    while window.is_open() && !window.is_key_down(Key::Escape) {
        window.get_mouse_pos(MouseMode::Discard).map(|mouse| {
            let screen_pos = ((mouse.1 as usize) * WIDTH) + mouse.0 as usize;
            println!("{:?}", window.get_unscaled_mouse_pos(MouseMode::Discard).unwrap());

            if window.get_mouse_down(MouseButton::Left) {
                buffer[screen_pos] = 0x00ffffff;
            }

            if window.get_mouse_down(MouseButton::Right) {
                buffer[screen_pos] = 0;
            }
        });

        window.get_scroll_wheel().map(|scroll| {
            println!("Scrolling {} - {}", scroll.0, scroll.1);
        });

        // We unwrap here as we want this code to exit if it fails
        window.update_with_buffer(&buffer).unwrap();
    }
}