use crate::*;
use tek_core::Direction;

/// Display mode of arranger
pub enum ArrangerViewMode {
    VerticalExpanded,
    VerticalCompact1,
    VerticalCompact2,
    Horizontal,
}

impl ArrangerViewMode {
    pub fn to_next (&mut self) {
        *self = match self {
            Self::VerticalExpanded => Self::VerticalCompact1,
            Self::VerticalCompact1 => Self::VerticalCompact2,
            Self::VerticalCompact2 => Self::Horizontal,
            Self::Horizontal       => Self::VerticalExpanded,
        }
    }
}

render!(Arranger |self, buf, area| {
    let arrangement = |buf, area| match self.mode {
        ArrangerViewMode::Horizontal =>
            super::arranger_view_h::draw(self, buf, area),
        ArrangerViewMode::VerticalCompact1 =>
            super::arranger_view_v::draw_compact_1(self, buf, area),
        ArrangerViewMode::VerticalCompact2 =>
            super::arranger_view_v::draw_compact_2(self, buf, area),
        ArrangerViewMode::VerticalExpanded =>
            super::arranger_view_v::draw_expanded(self, buf, area),
    };
    if let Some(direction) = self.show_sequencer {
        let arrangement = arrangement(buf, area)?;
        match direction {
            Direction::Down => {
                let sequencer = if let Some(sequencer) = self.sequencer() {
                    sequencer.render(buf, Rect {
                        y: area.y + arrangement.height,
                        height: area.height - arrangement.height,
                        ..area
                    })?
                } else {
                    Rect::default()
                };
                Corners(Style::default().green().not_dim()).draw(buf, match self.focus_sequencer {
                    true => sequencer,
                    false => arrangement,
                })?;
            },
            _ => unimplemented!()
        }
        Ok(area)
    } else {
        arrangement(buf, area)
    }
});