use crate::*;

/// Banner.
pub(crate) const HEADER: &'static str = r#"
~ █▀█▀█ █▀▀█ █  █  ~~~  ~  ~ ~~  ~  ~  ~ ~~ ~ ~  ~  ~
    █   █▀   █▀▀▄  ~ heatwave is the new darkwave ~
 ~  ▀   █▀▀█ ▀  ▀ ~  ~~~  ~ ~  ~   ~ ~~~ ~~~ ~   ~~ "#;

pub fn show_version () {
    println!("versions aint real man");
}

pub fn run_with_config (config: Arc<Config>) -> Usually<()> {
    Cli::parse().run(Some(config))
}

/// The command-line interface descriptor.
///
/// ```
/// let cli: tek::Cli = Default::default();
///
/// use clap::CommandFactory;
/// tek::Cli::command().debug_assert();
/// ```
#[derive(Parser, Debug, Default)]
#[command(name = "tek", version, about = Some(HEADER), long_about = Some(HEADER))]
pub struct Cli {
    /// Pre-defined configuration modes.
    ///
    /// TODO: Replace these with scripted configurations.
    #[command(subcommand)] pub action: Action,

    /// Record data for performance flamegraph.
    #[arg(long)]
    trace: bool,
}

/// Command-line configuration.
impl Cli {
    pub fn run (&self, mut config: Option<Arc<Config>>) -> Usually<()> {
        if config.is_none() {
            config = Some(Config::init_new(None)?);
        }
        self.action.run(config.unwrap(), self.trace)
    }
}

/// Application modes that can be passed to the mommand line interface.
///
/// ```
/// let action: tek::Action = Default::default();
/// ```
#[derive(Debug, Clone, Subcommand, Default)]
pub enum Action {
    /// Continue where you left off
    #[default] Resume,
    /// Run headlessly in current session.
    Headless,
    /// Show status of current session.
    Status,
    /// List known sessions.
    List,
    /// Continue work in a copy of the current session.
    Fork,
    /// Create a new empty session.
    New(ProjectInit),
    /// Import media as new session.
    Import,
    /// Show configuration.
    Config,
    /// Show version.
    Version,
}

impl Action {
    fn run (&self, config: Arc<Config>, _trace: bool) -> Usually<()> {
        use Action::*;
        match self {
            Version   => show_version(),
            Config    => config.print(),
            Resume    => todo!("resume session"),
            List      => todo!("list sessions"),
            New(sesh) => Exit::run(|exit|Tui::run_main(
                exit.clone(),
                {
                    #[allow(unused_mut)]
                    let mut app = App::new(Some(exit), sesh.init()?, config, "Menu");
                    app.dialog = Dialog::welcome();
                    #[cfg(feature = "prof2")] {
                        if trace {
                            app.guard = Some({
                                use tracing_subscriber::{layer::SubscriberExt, util::SubscriberInitExt};
                                //let tracy = tracing_tracy::TracyLayer::default();
                                let (flame, _guard) = tracing_flame::FlameLayer::with_file("./tracing.folded").unwrap();
                                //let registry = tracing_subscriber::registry().with(flame).init();
                                //tracing::subscriber::set_global_default(registry)?;
                                tracing::subscriber::set_global_default(tracing_subscriber::registry().with(flame))?;
                                _guard
                            })
                        }
                    }
                    Arc::new(RwLock::new(app))
                })).map(|_|())?,
            _ => todo!()
        }
        Ok(())
    }
}

#[derive(Debug, Clone, Parser, Default)]
pub struct ProjectInit {
    /// Name of JACK client
    #[arg(short='n', long)] name: Option<String>,
    /// Whether to attempt to become transport master
    #[arg(short='Y', long, default_value_t = false)] sync_lead: bool,
    /// Whether to sync to external transport master
    #[arg(short='y', long, default_value_t = true)] sync_follow: bool,
    /// Initial tempo in beats per minute
    #[arg(short='b', long, default_value = None)] bpm: Option<f64>,
    /// Whether to include a transport toolbar (default: true)
    #[arg(short='c', long, default_value_t = true)] show_clock: bool,
    /// MIDI outs to connect to (multiple instances accepted)
    #[arg(short='I', long)] midi_from: Vec<String>,
    /// MIDI outs to connect to (multiple instances accepted)
    #[arg(short='i', long)] midi_from_re: Vec<String>,
    /// MIDI ins to connect to (multiple instances accepted)
    #[arg(short='O', long)] midi_to: Vec<String>,
    /// MIDI ins to connect to (multiple instances accepted)
    #[arg(short='o', long)] midi_to_re: Vec<String>,
    /// Audio outs to connect to left input
    #[arg(short='l', long)] left_from: Vec<String>,
    /// Audio outs to connect to right input
    #[arg(short='r', long)] right_from: Vec<String>,
    /// Audio ins to connect from left output
    #[arg(short='L', long)] left_to: Vec<String>,
    /// Audio ins to connect from right output
    #[arg(short='R', long)] right_to: Vec<String>,
    /// Tracks to creat
    #[arg(short='t', long)] tracks: Option<usize>,
    /// Scenes to create
    #[arg(short='s', long)] scenes: Option<usize>,
}
impl ProjectInit {
    pub fn init (&self) -> Usually<Project> {
        let Self {
            name, bpm, tracks, scenes,
            sync_lead: _, sync_follow: _,
            left_from, right_from, midi_from, midi_from_re,
            left_to, right_to, midi_to, midi_to_re,
            ..
        } = self;
        let name = name.as_ref().map_or("tek", |x|x.as_str());
        let jack = Jack::new(&name)?;
        let mut proj = Project::new(
            &jack,
            name.into(),
            Clock::new(&jack, *bpm)?,
            [].into_iter(),
            [].into_iter(),
            connect_midi_ins(
                &jack,  &"M".to_string(), midi_from.as_ref(), Some(midi_from_re)
            )?.into_iter(),
            connect_midi_outs(
                &jack, &"M".to_string(), midi_to.as_ref(),   Some(midi_to_re)
            )?.into_iter(),
            [].into_iter()
                .chain(
                    connect_audio_ins(&jack,  &"L".to_string(), &left_from,  None)?.into_iter()
                )
                .chain(
                    connect_audio_ins(&jack,  &"R".to_string(), &right_from, None)?.into_iter()
                ),
            [].into_iter()
                .chain(
                    connect_audio_outs(&jack, &"L".to_string(), &left_to,    None)?.into_iter()
                )
                .chain(
                    connect_audio_outs(&jack, &"R".to_string(), &right_to,   None)?.into_iter()
                ));
        proj.tracks_add_many(tracks.unwrap_or(0), None, [].into(), [].into())?;
        proj.scenes_add_many(scenes.unwrap_or(0))?;
        Ok(proj)
    }
}

pub fn print_status (project: &Project) {
    println!("Name:        {:?}",   &project.name);
    println!("JACK:        {:?}",   &project.jack);
    println!("Buffer:      {:?}",   &project.clock.chunk);
    println!("Sample rate: {:?}",   &project.clock.timebase.sr);
    println!("MIDI PPQ:    {:?}",   &project.clock.timebase.ppq);
    println!("Tempo:       {:?}",   &project.clock.timebase.bpm);
    println!("Quantize:    {:?}",   &project.clock.quant);
    println!("Launch:      {:?}",   &project.clock.sync);
    println!("Playhead:    {:?}us", &project.clock.playhead.usec);
    println!("Playhead:    {:?}s",  &project.clock.playhead.sample);
    println!("Playhead:    {:?}p",  &project.clock.playhead.pulse);
    println!("Started:     {:?}",   &project.clock.started);
    println!("Tracks:");
    for (i, t) in project.tracks.iter().enumerate() {
        println!("  Track {i}:   {} {} {:?} {:?}", t.name, t.width,
            &t.sequencer.play_clip, &t.sequencer.next_clip);
    }
    println!("Scenes:");
    for (i, t) in project.scenes.iter().enumerate() {
        println!("  Scene {i}:   {} {:?}", &t.name, &t.clips);
    }
    println!("MIDI Ins:    {:?}",   &project.midi_ins);
    println!("MIDI Outs:   {:?}",   &project.midi_outs);
    println!("Audio Ins:   {:?}",   &project.audio_ins);
    println!("Audio Outs:  {:?}",   &project.audio_outs);
    // TODO git integration
    // TODO dawvert integration
}

pub fn print_config (config: &Config) {
    use ::ansi_term::Color::*;
    println!("{:?}", config.dirs);

    config.views.for_each(|k, v|{
        println!("{} {} {}", Green.paint("VIEW"), Green.bold().paint(format!("{k:<16}")), v.source);
    });

    config.binds.for_each(|k, v|{
        println!("{} {}", Green.paint("BIND"), Green.bold().paint(format!("{k:<16}")));
        for (k, v) in v.0.iter() {
            print!("{} ", &Yellow.paint(match &k.0 {
                Event::Key(KeyEvent { modifiers, .. }) =>
                    format!("{:>16}", format!("{modifiers}")),
                _ => unimplemented!()
            }));
            print!("{}", &Yellow.bold().paint(match &k.0 {
                Event::Key(KeyEvent { code, .. }) =>
                    format!("{:<10}", format!("{code}")),
                _ => unimplemented!()
            }));
            for v in v.iter() {
                print!(" => {:?}", v.commands);
                print!(" {}", v.condition.as_ref().map(|x|format!("{x:?}")).unwrap_or_default());
                println!(" {}", v.description.as_ref().map(|x|x.as_ref()).unwrap_or_default());
                //println!(" {:?}", v.source);
            }
        }
    });

    config.modes.for_each(|k, v|{
        println!();
        for v in v.name.iter() { print!("{}", Green.bold().paint(format!("{v} "))); }
        for v in v.info.iter() { print!("\n{}", Green.paint(format!("{v}"))); }
        print!("\n{} {}", Blue.paint("TOOL"), Green.bold().paint(format!("{k:<16}")));
        print!("\n{}", Blue.paint("KEYS"));
        for v in v.keys.iter() { print!("{}", Green.paint(format!(" {v}"))); }
        println!();
        v.modes.for_each(|k, v|{
            print!("{} {} {:?}", Blue.paint("MODE"), Green.bold().paint(format!("{k:<16}")), v.name);
            print!(  " INFO={:?}", v.info);
            print!(  " VIEW={:?}", v.view);
            println!(" KEYS={:?}", v.keys);
        });
        print!("{}", Blue.paint("VIEW"));
        for v in v.view.iter() { print!("{}", Green.paint(format!(" {v}"))); }
        println!();
    });
}

    //pub fn tui (
        //app:         Arc<RwLock<App>>,
        //jack:        Jack,
        //sync_lead:   &bool,
        //sync_follow: &bool,
    //) -> Usually<()> {
        //// Run the [Tui] and [Jack] threads with the [App] state.
        //Tui::run_main(&jack.run(move|jack|{
            //// Between jack init and app's first cycle:
            ////jack.sync_lead(*sync_lead, |mut state|{
                ////let clock = app.try_write().unwrap().clock();
                ////clock.playhead.update_from_sample(state.position.frame() as f64);
                ////state.position.bbt = Some(clock.bbt());
                ////state.position
            ////})?;
            ////jack.sync_follow(*sync_follow)?;
            //// FIXME: They don't work properly.
            //Ok(app)
        //})?)?
    //}