extern crate gfx4games;

use gfx4games::events::Key;
use gfx4games::events::MainLoop;
use gfx4games::events::run;
use gfx4games::graphics;
use gfx4games::graphics::Point2;
use gfx4games::graphics::Vector2;
use gfx4games::graphics::context::Context;
use gfx4games::graphics::text::Text;
use gfx4games::rect::Rect;
struct MainState {
    rect: Rect,
    rect_vel: Vector2<f32>,
}

impl MainState {
    pub fn new() -> MainState {
        MainState {
            rect: Rect::new(-30.0, 0.0, 5.5, 5.5),
            rect_vel: Vector2::new(0.0, 0.0),
        }
    }
}

impl MainLoop for MainState {
    fn draw(&mut self, ctx: &mut Context) {
        self.rect.draw(ctx);
        let mut text = Text::new(
            "Use arrow keys to move".to_string(),
            Point2::new(10.0, 30.0),
        );
        text.draw(ctx);
    }

    fn update(&mut self, _ctx: &mut Context, _dt: f32) {
        self.rect.set_color(graphics::INDIGO);
        self.rect.dx += self.rect_vel.x;
        self.rect.dy += self.rect_vel.y;
    }

    fn button_down(&mut self, key: Key) {
        match key {
            Key::Right => {
                self.rect_vel.x = 1.0;
            }
            Key::Left => {
                self.rect_vel.x = -1.0;
            }
            Key::Up => {
                self.rect_vel.y = 1.0;
            }
            Key::Down => {
                self.rect_vel.y = -1.0;
            }
            _ => {}
        }
    }

    fn button_release(&mut self, key: Key) {
        match key {
            Key::Right => {
                self.rect_vel.x = 0.0;
            }
            Key::Left => {
                self.rect_vel.x = 0.0;
            }
            Key::Up => {
                self.rect_vel.y = 0.0;
            }
            Key::Down => {
                self.rect_vel.y = 0.0;
            }
            _ => {}
        }
    }
}

fn main() {
    let mut state = MainState::new();

    let mut ctx = Context::new("Input Example".to_string(), 512, 512);
    println!("Use arrow keys to move rectangle");
    run(&mut ctx, &mut state, 120);
}