use windows::{
    core::{implement, Interface},
    Win32::Media::Audio::{
        IAudioSessionControl, IAudioSessionControl2, IAudioSessionNotification, IAudioSessionNotification_Impl,
    },
};

#[implement(IAudioSessionNotification)]
pub(crate) struct SessionNotification {
    pub(crate) observer: Box<dyn SessionObserver>,
}

pub trait SessionObserver {
    fn add_session(&self, session: IAudioSessionControl2);
}

impl IAudioSessionNotification_Impl for SessionNotification_Impl {
    fn OnSessionCreated(&self,newsession:windows_core::Ref<'_, IAudioSessionControl>) -> windows::core::Result<()> {
        let ses: IAudioSessionControl2 = newsession.as_ref().unwrap().cast().unwrap();
        self.observer.add_session(ses);
        Ok(())
    }
}