use crate::*;

impl Content for ArrangerStatusBar {
    type Engine = Tui;
    fn content (&self) -> impl Widget<Engine = Tui> {
        let label = match self {
            Self::Transport        => "TRANSPORT",
            Self::ArrangementMix   => "PROJECT",
            Self::ArrangementTrack => "TRACK",
            Self::ArrangementScene => "SCENE",
            Self::ArrangementClip  => "CLIP",
            Self::PhrasePool       => "SEQ LIST",
            Self::PhraseView       => "VIEW SEQ",
            Self::PhraseEdit       => "EDIT SEQ",
        };
        let status_bar_bg = Arranger::<Tui>::status_bar_bg();
        let mode_bg = Arranger::<Tui>::mode_bg();
        let mode_fg = Arranger::<Tui>::mode_fg();
        let mode    = TuiStyle::bold(format!(" {label} "), true).bg(mode_bg).fg(mode_fg);
        let commands = match self {
            Self::ArrangementMix => command(&[
                ["", "c",     "olor"],
                ["", "<>",    "resize"],
                ["", "+-",    "zoom"],
                ["", "n",     "ame/number"],
                ["", "Enter", " stop all"],
            ]),
            Self::ArrangementClip => command(&[
                ["",   "g",    "et"],
                ["",   "s",    "et"],
                ["",   "a",    "dd"],
                ["",   "i",    "ns"],
                ["",   "d",    "up"],
                ["",   "e",    "dit"],
                ["",   "c",    "olor"],
                ["re", "n",    "ame"],
                ["",   ",.",   "select"],
                ["", "Enter",  " launch"],
            ]),
            Self::ArrangementTrack => command(&[
                ["re", "n",     "ame"],
                ["",   ",.",    "resize"],
                ["",   "<>",    "move"],
                ["",   "i",     "nput"],
                ["",   "o",     "utput"],
                ["",   "m",     "ute"],
                ["",   "s",     "olo"],
                ["",   "Del",   "ete"],
                ["",   "Enter", " stop"],
            ]),
            Self::ArrangementScene => command(&[
                ["re", "n",     "ame"],
                ["",   "Del",   "ete"],
                ["",   "Enter", " launch"],
            ]),
            Self::PhrasePool => command(&[
                ["",     "a",   "ppend"],
                ["",     "i",   "nsert"],
                ["",     "d",   "uplicate"],
                ["",     "Del", "ete"],
                ["",     "c",   "olor"],
                ["re",   "n",   "ame"],
                ["leng", "t",   "h"],
                ["",     ",.",  "move"],
                ["",     "+-",  "resize view"],
            ]),
            Self::PhraseView => command(&[
                ["", "enter",            " edit"],
                ["", "arrows/pgup/pgdn", " scroll"],
                ["", "+=",               "zoom"],
            ]),
            Self::PhraseEdit => command(&[
                ["", "esc", " exit"],
                ["", "a",   "ppend"],
                ["", "s",   "et"],
                ["", "][",  "length"],
                ["", "+-",  "zoom"],
            ]),
            _ => command(&[])
        };
        //let commands = commands.iter().reduce(String::new(), |s, (a, b, c)| format!("{s} {a}{b}{c}"));
        row!(mode, commands).fill_x().bg(status_bar_bg)
    }
}

fn command (commands: &[[impl Widget<Engine = Tui>;3]]) -> impl Widget<Engine = Tui> + '_ {
    Stack::right(|add|{
        Ok(for [a, b, c] in commands.iter() {
            add(&row!(
                " ",
                widget(a),
                widget(b).bold(true).fg(Arranger::<Tui>::hotkey_fg()),
                widget(c),
            ))?;
        })
    })
}