use crate::prelude::*;

    //let render_with_actions = |actions| |state, frame: &mut Frame| {
        //let layout = Layout::default()
            //.direction(Direction::Horizontal)
            //.constraints(vec![
                //Constraint::Percentage(30),
                //Constraint::Percentage(70),
            //])
            //.split(frame.size());
        //frame.render_widget_ref(ActionBar(actions), layout[0]);
        //frame.render_widget_ref(state, layout[1]);
        //Ok(())
    //};

pub struct ActionBar<'a>(pub &'a [(&'static str, &'static str)]);

impl<'a> WidgetRef for ActionBar<'a> {
    fn render_ref (&self, area: Rect, buf: &mut Buffer) {
        let layout = Layout::default()
            .direction(Direction::Vertical)
            .constraints(self.0.iter().map(|_|Constraint::Length(3)).collect::<Vec<_>>())
            .split(area);
        for (index, action) in self.0.iter().enumerate() {
            Line::raw(action.0).render(layout[index], buf);
        }
    }
}

pub fn draw_leaf (buffer: &mut Buffer, area: Rect, y: u16, x: u16, text: &str) {
    use ratatui::style::{Style, Stylize};
    let border = Style::default().gray().dim();
    let label  = Style::default();
    let side   = String::from("│");
    let bottom = format!("╰{}╯", "─".repeat(text.len() as usize));
    buffer.set_string(area.x + x, area.y + y, &side, border);
    buffer.set_string(area.x + x + 1, area.y + y, format!("{text}"), label);
    buffer.set_string(area.x + x + text.len() as u16 + 1, area.y + y, &side, border);
    buffer.set_string(area.x + x, area.y + 1 + y, bottom, border);
}

pub fn draw_box (buffer: &mut Buffer, area: Rect) {
    use ratatui::style::{Style, Stylize};
    let border = Style::default().gray().dim();
    let top    = format!("╭{}╮", "─".repeat((area.width - 2).into()));
    let bottom = format!("╰{}╯", "─".repeat((area.width - 2).into()));
    buffer.set_string(area.x, area.y, top, border);
    for y in (area.y + 1)..(area.y + area.height - 1) {
        buffer.set_string(area.x, y, format!("│"), border);
        buffer.set_string(area.x + area.width - 1, y, format!("│"), border);
    }
    buffer.set_string(area.x, area.y + area.height - 1, bottom, border);
}

pub fn draw_focus_corners (buffer: &mut Buffer, area: Rect) {
    use ratatui::style::{Style, Stylize};
    let focus = Style::default().yellow().bold().not_dim();
    buffer.set_string(area.x, area.y, "╭", focus);
    buffer.set_string(area.x + area.width - 1, area.y, "╮", focus);
    buffer.set_string(area.x, area.y + area.height - 1, "╰", focus);
    buffer.set_string(area.x + area.width - 1, area.y + area.height - 1, "╯", focus);
}

pub fn render_toolbar_vertical (
    stdout:  &mut std::io::Stdout,
    offset:  (u16, u16),
    actions: &[(&str, &str)],
) -> Result<(u16, u16), Box<dyn Error>> {
    let move_to = |col, row| MoveTo(offset.0 + col, offset.1 + row);
    let mut x: u16 = 1;
    let mut y: u16 = 0;
    for (name, description) in actions.iter() {
        stdout.queue(move_to(1, y))?.queue(
            PrintStyledContent(name.yellow().bold())
        )?.queue(move_to(1, y + 1))?.queue(
            PrintStyledContent(description.yellow())
        )?;
        y = y + 3;
        x = u16::max(x, usize::max(name.len(), description.len()) as u16);
    }
    Ok((x, y))
}

pub fn render_box (
    stdout: &mut std::io::Stdout,
    title: Option<&str>,
    x: u16,
    y: u16,
    mut w: u16,
    h: u16,
    active: bool
) -> Result<(), Box<dyn Error>> {
    if let Some(title) = title {
        w = u16::max(w, title.len() as u16 + 4);
    }
    let back: String = std::iter::repeat(" ").take(w.saturating_sub(2) as usize).collect();
    if active {
        let edge: String = std::iter::repeat("━").take(w.saturating_sub(2) as usize).collect();
        stdout.queue(MoveTo(x, y))?.queue(PrintStyledContent(format!("┏{edge}┓").bold().yellow()))?;
        if let Some(title) = title {
            stdout.queue(MoveTo(x+1, y))?.queue(PrintStyledContent(format!(" {title} ").yellow()))?;
        }
        for row in y+1..y+h {
            stdout.queue(MoveTo(x, row))?.queue(PrintStyledContent("┃".bold().yellow()))?;
            stdout.queue(MoveTo(x+w-1, row))?.queue(PrintStyledContent("┃".bold().yellow()))?;
        }
        stdout.queue(MoveTo(x, y+h))?.queue(PrintStyledContent(format!("┗{edge}┛").bold().yellow()))?;
    } else {
        let edge: String = std::iter::repeat("─").take(w.saturating_sub(2) as usize).collect();
        stdout.queue(MoveTo(x, y))?.queue(PrintStyledContent(format!("┌{edge}┐").grey().dim()))?;
        if let Some(title) = title {
            stdout.queue(MoveTo(x+1, y))?.queue(Print(format!(" {title} ")))?;
        }
        for row in y+1..y+h {
            stdout.queue(MoveTo(x, row))?.queue(PrintStyledContent("│".grey().dim()))?;
            stdout.queue(MoveTo(x+w-1, row))?.queue(PrintStyledContent("│".grey().dim()))?;
        }
        stdout.queue(MoveTo(x, y+h))?.queue(PrintStyledContent(format!("└{edge}┘").grey().dim()))?;
    }
    Ok(())
}