use sdl2::EventPump;
use sdl2::pixels::Color;
use sdl2::render::BlendMode;
use sdl2::render::Canvas;
use sdl2::video::Window;

use {SCREEN_HEIGHT, SCREEN_WIDTH};
use sprites::SpriteManager;

pub struct App {
    pub canvas: Canvas<Window>,
    pub event_pump: EventPump,
    pub sprites: SpriteManager,
}

impl App {
    pub fn new() -> App {
        let context = sdl2::init().unwrap();
        sdl2::image::init(sdl2::image::InitFlag::PNG).unwrap();
        let window = context.video().unwrap().window("SDL test", SCREEN_WIDTH, SCREEN_HEIGHT)
            .position_centered()
            .opengl()
            .build()
            .unwrap();
        context.mouse().show_cursor(false);
        let mut canvas = window.into_canvas().build().unwrap();
        canvas.set_blend_mode(BlendMode::Add);
        canvas.set_draw_color(Color::RGB(0, 0, 0));
        canvas.clear();
        canvas.present();
        let event_pump = context.event_pump().unwrap();
        let sprites = SpriteManager::new(canvas.texture_creator());
        App {
            canvas,
            event_pump,
            sprites,
        }
    }

    pub fn load_sprites(&mut self, sprites: &[(&'static str, &str)]) {
        for (name, file) in sprites {
            self.sprites.load(name, file);
        }
    }
}