use std::cell::RefCell;
use sdl2::haptic::Haptic;
use sdl2::HapticSubsystem;
use sdl2::GameControllerSubsystem;
use sdl2::event::Event;
use sdl2::controller::GameController;
use std::rc::Rc;

//#[derive(Debug)]
pub struct ControllerManager {
    ctrl: GameControllerSubsystem,
    haptic: Rc<HapticSubsystem>,
    pub controllers: Vec<Rc<Controller>>,
}

//#[derive(Debug)]
pub struct Controller {
    id: u32,
    pub ctrl: GameController,
    haptic: Option<Rc<RefCell<Haptic>>>,
}

impl ControllerManager {
    pub fn new(ctrl: GameControllerSubsystem, haptic: HapticSubsystem) -> Self {
	ControllerManager {
	    ctrl,
	    haptic: Rc::new(haptic),
	    controllers: vec![],
	}
    }

    pub fn handle_event(&mut self, event: &Event) {
	match event {
	    Event::ControllerDeviceAdded { which: id, .. } => { self.add_device(*id) }
	    Event::ControllerDeviceRemoved { which: id, .. } => { self.remove_device(*id) }
	    Event::ControllerDeviceRemapped { which: id, .. } => { println!("device remapped ({})!", *id) }
	    Event::ControllerButtonDown { button: btn, .. } => { println!("button {} down!", btn.string()) }
	    Event::ControllerButtonUp { button: btn, .. } => { println!("button {} up!", btn.string()) }
	    Event::ControllerAxisMotion { axis: ax, .. } => { println!("axis motion {}!", ax.string()) }
	    _ => {}
	}
    }

    pub fn add_device(&mut self, id: u32) {
	println!("device added ({})!", id);
	let mut ctrl = self.ctrl.open(id).unwrap();
	println!("opened {}", ctrl.name());
	let haptic = match ctrl.set_rumble(500, 1000, 500) {
	    Ok(_) => self.haptic.open_from_joystick_id(id).ok(),
	    Err(_) => None
	};

	let c = Rc::new(Controller {id, ctrl, haptic: haptic.map(|h| Rc::new(RefCell::new(h)))});
	c.rumble(0.5, 300);
	self.controllers.push(c);
    }

    pub fn remove_device(&mut self, id: i32) {
	println!("device removed ({})!", id);
    }
}

impl Controller {
    /// strength [0 - 1]
    pub fn rumble(&self, strength: f32, duration_ms: u32) {
	if let Some(h) = &self.haptic {
	    h.borrow_mut().rumble_play(strength, duration_ms);
	}
    }
}