use crate::*;

/// Status bar for sequencer app
#[derive(Clone)]
pub struct SequencerStatus {
    pub(crate) width:   usize,
    pub(crate) cpu:     Option<String>,
    pub(crate) size:    String,
    pub(crate) playing: bool,
}
from!(|state:&SequencerTui|SequencerStatus = {
    let samples = state.clock.chunk.load(Relaxed);
    let rate    = state.clock.timebase.sr.get();
    let buffer  = samples as f64 / rate;
    let width   = state.size.w();
    Self {
        width,
        playing: state.clock.is_rolling(),
        cpu:  state.perf.percentage().map(|cpu|format!("│{cpu:.01}%")),
        size: format!("{}x{}│", width, state.size.h()),
    }
});
render!(<Tui>|self: SequencerStatus|Fixed::y(2, lay!([
    Self::help(),
    Fill::xy(Align::se(Tui::fg_bg(TuiTheme::orange(), TuiTheme::g(25), self.stats()))),
])));
impl SequencerStatus {
    fn help () -> impl Render<Tui> {
        let single = |binding, command|row!([" ", col!([
            Tui::fg(TuiTheme::yellow(), binding),
            command
        ])]);
        let double = |(b1, c1), (b2, c2)|col!([
            row!(["  ", Tui::fg(TuiTheme::yellow(), b1), " ", c1,]),
            row!(["  ", Tui::fg(TuiTheme::yellow(), b2), " ", c2,]),
        ]);
        Tui::fg_bg(TuiTheme::g(255), TuiTheme::g(50), row!([
            single("SPACE", "play/pause"),
            double(("▲▼▶◀", "cursor"),  ("Ctrl", "scroll"),  ),
            double(("a",    "append"),  ("s",    "set note"),),
            double((",.",   "length"),  ("<>",   "triplet"), ),
            double(("[]",   "phrase"),  ("{}",   "order"),   ),
            double(("q",    "enqueue"), ("e",    "edit"),    ),
            double(("c",    "color"),   ("",     ""),),
        ]))
    }
    fn stats (&self) -> impl Render<Tui> + use<'_> {
        row!([&self.cpu, &self.size])
    }
}