rs_poker 5.0.0

A library to help with any Rust code dealing with poker. This includes card values, suits, hands, hand ranks, 5 card hand strength calculation, 7 card hand strength calulcation, and monte carlo game simulation helpers.
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use ratatui::{
    Frame,
    layout::{Constraint, Layout, Rect},
    style::Style,
    text::{Line, Span},
    widgets::{Gauge, Paragraph},
};

use crate::tui::{
    state::TuiState,
    theme::{LAVENDER, OVERLAY0, RED, SKY, SUBTEXT0, SURFACE1, TEXT, keybinding_key_style},
};

pub fn render_progress(frame: &mut Frame, area: Rect, state: &TuiState) {
    if let Some(ref err) = state.error {
        let line = Line::from(Span::styled(
            format!(" ✕ Error: {} ", err),
            Style::default().fg(RED),
        ));
        frame.render_widget(Paragraph::new(line), area);
        return;
    }
    if state.live {
        render_live_progress(frame, area, state);
    } else {
        render_static_status(frame, area, state);
    }
}

fn keybinding_hints() -> Vec<Span<'static>> {
    vec![
        Span::styled("q", keybinding_key_style()),
        Span::styled(" Quit  ", Style::default().fg(OVERLAY0)),
        Span::styled("j/k", keybinding_key_style()),
        Span::styled(" ↕  ", Style::default().fg(OVERLAY0)),
        Span::styled("^d/^u", keybinding_key_style()),
        Span::styled(" ½Pg  ", Style::default().fg(OVERLAY0)),
        Span::styled("g/G", keybinding_key_style()),
        Span::styled(" Top/End  ", Style::default().fg(OVERLAY0)),
        Span::styled("Tab", keybinding_key_style()),
        Span::styled(" Panel  ", Style::default().fg(OVERLAY0)),
        Span::styled("Enter", keybinding_key_style()),
        Span::styled(" Select  ", Style::default().fg(OVERLAY0)),
        Span::styled("s", keybinding_key_style()),
        Span::styled(" Sort", Style::default().fg(OVERLAY0)),
    ]
}

fn render_live_progress(frame: &mut Frame, area: Rect, state: &TuiState) {
    let chunks =
        Layout::horizontal([Constraint::Percentage(50), Constraint::Percentage(50)]).split(area);

    // Left side: progress gauge or counter
    if let Some(target) = state.games_target {
        let ratio = if target > 0 {
            state.games_completed() as f64 / target as f64
        } else {
            0.0
        };
        let gauge = Gauge::default()
            .ratio(ratio.min(1.0))
            .label(format!("{} / {}", state.games_completed(), target))
            .gauge_style(Style::default().fg(LAVENDER).bg(SURFACE1));
        frame.render_widget(gauge, chunks[0]);
    } else {
        // When a filter is active, show matching/total alongside the count
        // rather than a separate "match" segment in the detail line.
        let label = if state.filter.is_active() {
            format!(
                "{} / {} games",
                state.matching_games(),
                state.games_completed()
            )
        } else {
            format!("{} games", state.games_completed())
        };
        let counter = Paragraph::new(Span::styled(label, Style::default().fg(TEXT)));
        frame.render_widget(counter, chunks[0]);
    };

    // Right side: stats and keybindings
    let gps = state.games_per_second();
    let elapsed = state.elapsed();
    let elapsed_str = format!("{}:{:02}", elapsed.as_secs() / 60, elapsed.as_secs() % 60);

    // The ETA segment is only meaningful for bounded runs; `state.eta()`
    // returns `None` for unbounded and completed runs, so those omit it.
    let mut detail = format!(" │ {} │ ", elapsed_str);
    if let Some(eta) = state.eta() {
        let eta_str = format!("{}:{:02}", eta.as_secs() / 60, eta.as_secs() % 60);
        detail = format!(" │ {} │ ETA {} │ ", elapsed_str, eta_str);
    }

    let mut spans = vec![
        Span::styled(format!(" {:.1} g/s", gps), Style::default().fg(SKY)),
        Span::styled(detail, Style::default().fg(SUBTEXT0)),
    ];
    spans.extend(keybinding_hints());

    frame.render_widget(Paragraph::new(Line::from(spans)), chunks[1]);
}

fn render_static_status(frame: &mut Frame, area: Rect, state: &TuiState) {
    let total = state.games_completed();
    let label = if state.filter.is_active() {
        format!(" {} / {} games ", state.matching_games(), total)
    } else {
        format!(" {} games loaded ", total)
    };
    let mut spans = vec![
        Span::styled(label, Style::default().fg(SKY)),
        Span::styled("│ ", Style::default().fg(SUBTEXT0)),
    ];
    spans.extend(keybinding_hints());

    frame.render_widget(Paragraph::new(Line::from(spans)), area);
}

#[cfg(test)]
mod tests {
    use super::*;
    use insta::assert_snapshot;
    use ratatui::{Terminal, backend::TestBackend};

    #[test]
    fn test_render_static_status() {
        let backend = TestBackend::new(100, 1);
        let mut terminal = Terminal::new(backend).unwrap();
        let mut state = TuiState::new(Some(50));
        state.live = false;
        state.set_games_completed(42);
        terminal
            .draw(|frame| {
                render_progress(frame, frame.area(), &state);
            })
            .unwrap();
        assert_snapshot!(terminal.backend());
    }

    #[test]
    fn test_render_live_progress_unbounded_omits_eta() {
        let backend = TestBackend::new(100, 1);
        let mut terminal = Terminal::new(backend).unwrap();
        let mut state = TuiState::new(None); // unbounded => no ETA
        state.set_games_completed(5);
        terminal
            .draw(|frame| {
                render_progress(frame, frame.area(), &state);
            })
            .unwrap();
        let buf = format!("{:?}", terminal.backend().buffer());
        assert!(
            !buf.contains("ETA"),
            "unbounded runs must not render an ETA"
        );
    }

    #[test]
    fn test_live_progress_shows_matching_over_total_when_filtered() {
        use crate::tui::state::RoundLabel;
        let backend = TestBackend::new(120, 1);
        let mut terminal = Terminal::new(backend).unwrap();
        let mut state = TuiState::new(None); // unbounded => left counter, not gauge
        state.set_games_completed(50);
        state.filter.toggle_street(RoundLabel::River);
        let mut proj = crate::tui::projection::Projection::new();
        proj.set_game_count(7);
        state.set_filter_projection(Some(proj));

        terminal
            .draw(|frame| render_progress(frame, frame.area(), &state))
            .unwrap();
        let buf = format!("{:?}", terminal.backend().buffer());
        assert!(
            buf.contains("7 / 50 games"),
            "filtered live counter should show matching/total"
        );
        assert!(
            !buf.contains("match"),
            "the separate match segment should no longer be rendered"
        );
    }

    #[test]
    fn test_static_status_shows_matching_over_total_when_filtered() {
        use crate::tui::state::RoundLabel;
        let backend = TestBackend::new(120, 1);
        let mut terminal = Terminal::new(backend).unwrap();
        let mut state = TuiState::new(Some(50));
        state.live = false;
        state.set_games_completed(50);
        // Simulate an active filter with a filtered projection of 7 games.
        state.filter.toggle_street(RoundLabel::River);
        let mut proj = crate::tui::projection::Projection::new();
        proj.set_game_count(7);
        state.set_filter_projection(Some(proj));

        terminal
            .draw(|frame| render_progress(frame, frame.area(), &state))
            .unwrap();
        let buf = format!("{:?}", terminal.backend().buffer());
        assert!(
            buf.contains("7 / 50"),
            "filtered static status should show matching/total"
        );
    }

    #[test]
    fn test_static_status_shows_total_when_unfiltered() {
        let backend = TestBackend::new(120, 1);
        let mut terminal = Terminal::new(backend).unwrap();
        let mut state = TuiState::new(Some(50));
        state.live = false;
        state.set_games_completed(42);
        terminal
            .draw(|frame| render_progress(frame, frame.area(), &state))
            .unwrap();
        let buf = format!("{:?}", terminal.backend().buffer());
        assert!(buf.contains("42 games loaded"));
    }

    #[test]
    fn test_render_error_status() {
        let backend = TestBackend::new(100, 1);
        let mut terminal = Terminal::new(backend).unwrap();
        let mut state = TuiState::new(Some(50));
        state.error = Some(crate::tui::event::SimError::Panic);
        terminal
            .draw(|frame| {
                render_progress(frame, frame.area(), &state);
            })
            .unwrap();
        assert_snapshot!(terminal.backend());
    }
}