use std::rc::Rc;

use crate::{
	any::AnyTrait,
	event::{CallbackDataCommon, EventListenerID},
};

pub mod button;
pub mod checkbox;
pub mod slider;
pub mod tooltip;

pub struct InitData<'a> {
	pub common: &'a mut CallbackDataCommon<'a>,
}

// common component data
#[derive(Default)]
pub struct ComponentBase {
	#[allow(dead_code)]
	lhandles: Vec<EventListenerID>,
}

pub trait ComponentTrait: AnyTrait {
	fn base(&mut self) -> &mut ComponentBase;
	fn init(&self, data: &mut InitData);
}

#[derive(Clone)]
pub struct Component(pub Rc<dyn ComponentTrait>);

pub type ComponentWeak = std::rc::Weak<dyn ComponentTrait>;

impl Component {
	pub fn weak(&self) -> ComponentWeak {
		Rc::downgrade(&self.0)
	}

	pub fn try_cast<T: 'static>(&self) -> anyhow::Result<Rc<T>> {
		if !(*self.0).as_any().is::<T>() {
			anyhow::bail!("try_cast: type not matching");
		}

		// safety: we already checked it above, should be safe to directly cast it
		unsafe { Ok(Rc::from_raw(Rc::into_raw(self.0.clone()).cast())) }
	}
}