use crate::*;

#[derive(Default, Debug)]
pub struct Arrangement {
    /// Project name.
    pub name:         Arc<str>,
    /// Base color.
    pub color:        ItemTheme,
    /// Jack client handle
    pub jack:         Jack,
    /// Source of time
    pub clock:        Clock,
    /// Allows one MIDI clip to be edited
    pub editor:       Option<MidiEditor>,
    /// List of global midi inputs
    pub midi_ins:     Vec<JackMidiIn>,
    /// List of global midi outputs
    pub midi_outs:    Vec<JackMidiOut>,
    /// List of global audio inputs
    pub audio_ins:    Vec<JackAudioIn>,
    /// List of global audio outputs
    pub audio_outs:   Vec<JackAudioOut>,
    /// Last track number (to avoid duplicate port names)
    pub track_last:   usize,
    /// List of tracks
    pub tracks:       Vec<Track>,
    /// Scroll offset of tracks
    pub track_scroll: usize,
    /// List of scenes
    pub scenes:       Vec<Scene>,
    /// Scroll offset of scenes
    pub scene_scroll: usize,
    /// Selected UI element
    pub selection:    Selection,
    /// Contains a render of the project arrangement, redrawn on update.
    /// TODO rename to "render_cache" or smth
    pub arranger:     Arc<RwLock<Buffer>>,
    /// Display size
    pub size:         Measure<TuiOut>,
}

has!(Jack:               |self: Arrangement|self.jack);
has!(Clock:              |self: Arrangement|self.clock);
has!(Selection:          |self: Arrangement|self.selection);
has!(Vec<JackMidiIn>:    |self: Arrangement|self.midi_ins);
has!(Vec<JackMidiOut>:   |self: Arrangement|self.midi_outs);
has!(Vec<Scene>:         |self: Arrangement|self.scenes);
has!(Vec<Track>:         |self: Arrangement|self.tracks);
has!(Measure<TuiOut>:    |self: Arrangement|self.size);
has!(Option<MidiEditor>: |self: Arrangement|self.editor);
maybe_has!(Track:      |self: Arrangement|
    { Has::<Selection>::get(self).track().map(|index|Has::<Vec<Track>>::get(self).get(index)).flatten() };
    { Has::<Selection>::get(self).track().map(|index|Has::<Vec<Track>>::get_mut(self).get_mut(index)).flatten() });
maybe_has!(Scene:      |self: Arrangement|
    { Has::<Selection>::get(self).track().map(|index|Has::<Vec<Scene>>::get(self).get(index)).flatten() };
    { Has::<Selection>::get(self).track().map(|index|Has::<Vec<Scene>>::get_mut(self).get_mut(index)).flatten() });

impl Arrangement {
    /// Width of display
    pub fn w (&self) -> u16 {
        self.size.w() as u16
    }
    /// Width allocated for sidebar.
    pub fn w_sidebar (&self, is_editing: bool) -> u16 {
        self.w() / if is_editing { 16 } else { 8 } as u16
    }
    /// Width taken by all tracks.
    pub fn w_tracks (&self) -> u16 {
        self.tracks_with_sizes(&self.selection(), None).last()
            .map(|(_, _, _, x)|x as u16).unwrap_or(0)
    }
    /// Width available to display tracks.
    pub fn w_tracks_area (&self, is_editing: bool) -> u16 {
        self.w().saturating_sub(self.w_sidebar(is_editing))
    }
    /// Height of display
    pub fn h (&self) -> u16 {
        self.size.h() as u16
    }
    /// Height taken by visible device slots.
    pub fn h_devices (&self) -> u16 {
        2
        //1 + self.devices_with_sizes().last().map(|(_, _, _, _, y)|y as u16).unwrap_or(0)
    }
    /// Get the active track
    pub fn get_track (&self) -> Option<&Track> {
        let index = self.selection().track()?;
        Has::<Vec<Track>>::get(self).get(index)
    }
    /// Get a mutable reference to the active track
    pub fn get_track_mut (&mut self) -> Option<&mut Track> {
        let index = self.selection().track()?;
        Has::<Vec<Track>>::get_mut(self).get_mut(index)
    }
    /// Get the active scene
    pub fn get_scene (&self) -> Option<&Scene> {
        let index = self.selection().scene()?;
        Has::<Vec<Scene>>::get(self).get(index)
    }
    /// Get a mutable reference to the active scene
    pub fn get_scene_mut (&mut self) -> Option<&mut Scene> {
        let index = self.selection().scene()?;
        Has::<Vec<Scene>>::get_mut(self).get_mut(index)
    }
    /// Get the active clip
    pub fn get_clip (&self) -> Option<Arc<RwLock<MidiClip>>> {
        self.get_scene()?.clips.get(self.selection().track()?)?.clone()
    }
    /// Put a clip in a slot
    pub fn clip_put (
        &mut self, track: usize, scene: usize, clip: Option<Arc<RwLock<MidiClip>>>
    ) -> Option<Arc<RwLock<MidiClip>>> {
        let old = self.scenes[scene].clips[track].clone();
        self.scenes[scene].clips[track] = clip;
        old
    }
    /// Change the color of a clip, returning the previous one
    pub fn clip_set_color (&self, track: usize, scene: usize, color: ItemTheme)
        -> Option<ItemTheme>
    {
        self.scenes[scene].clips[track].as_ref().map(|clip|{
            let mut clip = clip.write().unwrap();
            let old = clip.color.clone();
            clip.color = color.clone();
            panic!("{color:?} {old:?}");
            old
        })
    }
    /// Toggle looping for the active clip
    pub fn toggle_loop (&mut self) {
        if let Some(clip) = self.get_clip() {
            clip.write().unwrap().toggle_loop()
        }
    }
    /// Add multiple tracks
    pub fn tracks_add (
        &mut self,
        count: usize,
        width: Option<usize>,
        mins:  &[PortConnect],
        mouts: &[PortConnect],
    ) -> Usually<()> {
        let jack = self.jack().clone();
        let track_color_1 = ItemColor::random();
        let track_color_2 = ItemColor::random();
        for i in 0..count {
            let color = track_color_1.mix(track_color_2, i as f32 / count as f32).into();
            let mut track = self.track_add(None, Some(color), mins, mouts)?.1;
            if let Some(width) = width {
                track.width = width;
            }
        }
        Ok(())
    }

    /// Add a track
    pub fn track_add (
        &mut self,
        name:  Option<&str>,
        color: Option<ItemTheme>,
        mins:  &[PortConnect],
        mouts: &[PortConnect],
    ) -> Usually<(usize, &mut Track)> {
        let name: Arc<str> = name.map_or_else(
            ||format!("t{:02}", self.track_last).into(),
            |x|x.to_string().into()
        );
        self.track_last += 1;
        let mut track = Track {
            width:  (name.len() + 2).max(12),
            color:  color.unwrap_or_else(ItemTheme::random),
            sequencer: Sequencer::new(
                &format!("{name}"),
                self.jack(),
                Some(self.clock()),
                None,
                mins,
                mouts
            )?,
            name,
            ..Default::default()
        };
        self.tracks_mut().push(track);
        let len = self.tracks().len();
        let index = len - 1;
        for scene in self.scenes_mut().iter_mut() {
            while scene.clips.len() < len {
                scene.clips.push(None);
            }
        }
        Ok((index, &mut self.tracks_mut()[index]))
    }
}

#[cfg(feature = "sampler")]
impl Arrangement {
    /// Get the first sampler of the active track
    pub fn sampler (&self) -> Option<&Sampler> {
        self.get_track()?.sampler(0)
    }
    /// Get the first sampler of the active track
    pub fn sampler_mut (&mut self) -> Option<&mut Sampler> {
        self.get_track_mut()?.sampler_mut(0)
    }
}

impl ScenesView for Arrangement {
    fn h_scenes (&self) -> u16 {
        (self.height() as u16).saturating_sub(20)
    }
    fn w_side (&self) -> u16 {
        (self.width() as u16 * 2 / 10).max(20)
    }
    fn w_mid (&self) -> u16 {
        (self.width() as u16).saturating_sub(2 * self.w_side()).max(40)
    }
}