use crate::*;

/// Wraps [JackState], and through it [jack::Client] when connected.
///
/// ```
/// let jack: tek_engine::Jack = Default::default();
/// ```
#[derive(Clone, Debug, Default)]
pub struct Jack<'j> (pub(crate) Arc<RwLock<JackState<'j>>>);

/// This is a connection which may be [Inactive], [Activating], or [Active].
/// In the [Active] and [Inactive] states, [JackState::client] returns a
/// [jack::Client], which you can use to talk to the JACK API.
///
/// ```
/// let state: tek_engine::JackState = Default::default();
/// ```
#[derive(Debug, Default)]
pub enum JackState<'j> {
    /// Unused
    #[default] Inert,
    /// Before activation.
    Inactive(Client),
    /// During activation.
    Activating,
    /// After activation. Must not be dropped for JACK thread to persist.
    Active(DynamicAsyncClient<'j>),
}

/// Event enum for JACK events.
///
/// ```
/// let event: tek_engine::JackState = JackEvent::XRun;
/// ```
#[derive(Debug, Clone, PartialEq)] pub enum JackEvent {
    ThreadInit,
    Shutdown(ClientStatus, Arc<str>),
    Freewheel(bool),
    SampleRate(Frames),
    ClientRegistration(Arc<str>, bool),
    PortRegistration(PortId, bool),
    PortRename(PortId, Arc<str>, Arc<str>),
    PortsConnected(PortId, PortId, bool),
    GraphReorder,
    XRun,
}

/// Generic notification handler that emits [JackEvent]
///
/// ```
/// let notify = tek_engine::JackNotify(|_: JackEvent|{});
/// ```
pub struct JackNotify<T: Fn(JackEvent) + Send>(pub T);