use crate::*;

#[derive(Clone, PartialEq)]
pub enum ArrangerCommand {
    FocusNext,
    FocusPrev,
    FocusUp,
    FocusDown,
    FocusLeft,
    FocusRight,
    Transport(TransportCommand),
    Phrases(PhrasePoolCommand),
    Editor(PhraseEditorCommand),
    Arrangement(ArrangementCommand),
}
#[derive(Clone, PartialEq)]
pub enum ArrangementCommand {
    ToggleViewMode,
    Delete,
    Activate,
    Increment,
    Decrement,
    ZoomIn,
    ZoomOut,
    MoveBack,
    MoveForward,
    RandomColor,
    Put,
    Get,
    AddScene,
    AddTrack,
    ToggleLoop,
    GoUp,
    GoDown,
    GoLeft,
    GoRight,
}
impl <E: Engine> Command<Arranger<E>> for ArrangerCommand {
    fn run (&self, state: &mut Arranger<E>) -> Perhaps<Self> {
        use ArrangerCommand::*;
        match self {
            FocusNext  => { state.focus_next(); },
            FocusPrev  => { state.focus_prev(); },
            FocusUp    => { state.focus_up(); },
            FocusDown  => { state.focus_down(); },
            FocusLeft  => { state.focus_left(); },
            FocusRight => { state.focus_right(); },
            Transport(command) => if let Some(ref transport) = state.transport {
                return command.run(&mut*transport.write().unwrap()).map(|x|x.map(Transport))
            },
            Phrases(command) => {
                return command.run(&mut*state.phrases.write().unwrap()).map(|x|x.map(Phrases))
            },
            Editor(command) => {
                return command.run(&mut state.editor).map(|x|x.map(Editor))
            },
            Arrangement(command) => {
                return command.run(&mut state.arrangement).map(|x|x.map(Arrangement))
            },
        }
        state.show_phrase();
        state.update_status();
        Ok(None)
    }
}
impl <E: Engine> Command<Arrangement<E>> for ArrangementCommand {
    fn run (&self, state: &mut Arrangement<E>) -> Perhaps<Self> {
        use ArrangementCommand::*;
        match self {
            ToggleViewMode => { state.mode.to_next(); },
            Delete         => { state.delete(); },
            Activate       => { state.activate(); },
            Increment      => { state.increment(); },
            Decrement      => { state.decrement(); },
            ZoomIn         => { state.zoom_in(); },
            ZoomOut        => { state.zoom_out(); },
            MoveBack       => { state.move_back(); },
            MoveForward    => { state.move_forward(); },
            RandomColor    => { state.randomize_color(); },
            Put            => { state.phrase_put(); },
            Get            => { state.phrase_get(); },
            AddScene       => { state.scene_add(None, None)?; },
            AddTrack       => { state.track_add(None, None)?; },
            ToggleLoop     => { state.toggle_loop() },
            GoUp           => { state.go_up() },
            GoDown         => { state.go_down() },
            GoLeft         => { state.go_left() },
            GoRight        => { state.go_right() },
        };
        Ok(None)
    }
}