zesdex/crates/zesdex-backend/src/view/overlays/loading.rs

//! Overlay: loading / processing spinner — shown during blocking operations
//! (e.g., streaming response, tool execution).
//!
//! Flow: renders an animated spinner frame from `state.misc.tick_count` with
//! a "Processing, please wait..." message.

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

/// Render the Loading overlay — spinner animation + processing message.
pub fn render(
    frame: &mut Frame,
    area: ratatui::layout::Rect,
    block: Block<'static>,
    state: &crate::app::state::rest::AppStateRest,
) {
    tracing::debug!("overlay: Loading");
    let block = block
        .title(Span::styled(
            " Loading ",
            Style::default()
                .fg(Theme::WARNING)
                .add_modifier(Modifier::BOLD),
        ))
        .border_style(Style::default().fg(Theme::WARNING));
    let spinner = ["⠋", "⠙", "⠹", "⠸", "⠼", "⠴", "⠦", "⠧", "⠇", "⠏"];
    let frame_idx = (state.misc.tick_count as usize) % spinner.len();
    let content = format!("  {} Processing, please wait...", spinner[frame_idx]);
    let paragraph = Paragraph::new(content).block(block);
    frame.render_widget(paragraph, area);
}