//! Overlay: effort-level selector — lets the user pick a reasoning/quality
//! tier (from `EFFORT_LEVELS`) with ↑/↓ navigation.
//!
//! Flow: reads the current effort index from `mode::effort::current_effort`,
//! highlights the active entry, and renders the full list.

use ratatui::style::{Modifier, Style};
use ratatui::text::{Line, Span};
use ratatui::widgets::{Block, Paragraph};
use ratatui::Frame;
use crate::view::theme::Theme;
use tracing;

/// Render the Effort Level overlay — list of tiers with the current one highlighted.
pub fn render(
    frame: &mut Frame,
    area: ratatui::layout::Rect,
    block: Block<'static>,
    state: &crate::app::state::rest::AppStateRest,
) {
    tracing::debug!("overlay: Effort Level");
    let block = block
        .title(Span::styled(
            " Effort Level ",
            Style::default()
                .fg(Theme::ACCENT_PURPLE)
                .add_modifier(Modifier::BOLD),
        ))
        .border_style(Style::default().fg(Theme::ACCENT_PURPLE));
    let levels = crate::app::mode::effort::EFFORT_LEVELS;
    let current_idx = crate::app::mode::effort::current_effort(state);
    let mut lines: Vec<Line> = vec![
        Line::from(Span::styled(
            "  Use ↑↓ to change effort level",
            Style::default().fg(Theme::TEXT_DIM),
        )),
        Line::from(Span::raw("")),
    ];
    for (i, l) in levels.iter().enumerate() {
        let selected = i == current_idx;
        lines.push(Line::from(Span::styled(
            if selected {
                format!("  ▸ {l} (active)")
            } else {
                format!("    {l}")
            },
            if selected {
                Style::default()
                    .fg(Theme::HIGHLIGHT)
                    .add_modifier(Modifier::BOLD)
            } else {
                Style::default().fg(Theme::TEXT)
            },
        )));
    }
    let paragraph = Paragraph::new(lines).block(block);
    frame.render_widget(paragraph, area);
}