use crate::palette;
use ratatui::buffer::Buffer;
use ratatui::layout::Rect;
use ratatui::style::Style;
use ratatui::text::{Line, Span};
use ratatui::widgets::{Paragraph, Widget};

pub struct Hint {
    pub key: &'static str,
    pub label: &'static str,
}

pub fn hint(key: &'static str, label: &'static str) -> Hint {
    Hint { key, label }
}

pub struct Footer {
    hints: Vec<Hint>,
}

impl Footer {
    pub fn new(hints: impl IntoIterator<Item = Hint>) -> Self {
        Self {
            hints: hints.into_iter().collect(),
        }
    }
}

impl Widget for &Footer {
    fn render(self, area: Rect, buf: &mut Buffer) {
        let mut spans: Vec<Span> = Vec::with_capacity(self.hints.len() * 4);
        for (i, h) in self.hints.iter().enumerate() {
            if i > 0 {
                spans.push(Span::raw("   "));
            }
            spans.push(Span::styled(h.key, Style::default().fg(palette::ACCENT)));
            spans.push(Span::raw(" "));
            spans.push(Span::styled(h.label, Style::default().fg(palette::DIM)));
        }
        Paragraph::new(Line::from(spans))
            .style(Style::default().bg(palette::BG))
            .render(area, buf);
    }
}