prlens 0.1.0

//! Interactive TUI for the prlens PR review queue.
//!
//! Shows a full-width ratatui table with j/k (or arrow key) navigation.
//! Pressing Enter opens the selected PR in the browser via `open::that`.
//! Press q or Esc to quit.

use anyhow::Context;
use crossterm::{
    event::{self, Event, KeyCode, KeyEventKind},
    execute,
    terminal::{EnterAlternateScreen, LeaveAlternateScreen, disable_raw_mode, enable_raw_mode},
};
use ratatui::{
    Terminal,
    backend::CrosstermBackend,
    layout::{Alignment, Constraint, Direction, Flex, Layout, Rect},
    style::{Color, Modifier, Style},
    text::{Line, Span},
    widgets::{Block, Borders, Cell, Paragraph, Row, Table, TableState, Wrap},
};
// Wave 2 imports — added now to avoid re-touching imports when Wave 2 uses them
#[allow(unused_imports)]
use ratatui::layout::Position;
#[allow(unused_imports)]
use ratatui::widgets::Clear;
use std::sync::mpsc;
use std::time::{Duration, Instant};

use crate::models::{CiStatus, PullRequest, ReviewStatus};

/// Run the interactive PR table TUI, showing a loading spinner until `rx` delivers data.
///
/// Enters the alternate screen immediately so there is no gap between launch and display.
/// Restores terminal state on exit even if an error occurs inside the loop.
///
/// In non-TTY environments (tests, piped output) the function returns immediately after
/// consuming the channel value so callers do not block.
pub fn run_interactive(
    rx: mpsc::Receiver<(Vec<PullRequest>, Vec<String>)>,
    config: &crate::config::Config,
    initial_profile: Option<usize>,
) -> anyhow::Result<()> {
    use std::io::IsTerminal;
    if !std::io::stdout().is_terminal() {
        drop(rx.recv());
        return Ok(());
    }

    // --- Setup terminal ---
    enable_raw_mode().context("failed to enable raw mode")?;
    let mut stdout = std::io::stdout();
    execute!(stdout, EnterAlternateScreen).context("failed to enter alternate screen")?;
    let backend = CrosstermBackend::new(stdout);
    let mut terminal = Terminal::new(backend).context("failed to create terminal")?;

    // Run the loop; always restore terminal even on error.
    let result = run_tui_loop(&mut terminal, rx, config, initial_profile);

    // --- Restore terminal ---
    disable_raw_mode().context("failed to disable raw mode")?;
    execute!(terminal.backend_mut(), LeaveAlternateScreen)
        .context("failed to leave alternate screen")?;
    terminal.show_cursor().context("failed to show cursor")?;

    result
}

/// Mode gate for the TUI event dispatch. Tracks whether user is navigating, typing a search
/// query, or viewing the detail overlay for the selected PR.
#[derive(Default, PartialEq)]
enum AppMode {
    #[default]
    Normal,
    Searching,
    ShowingDetail,
}

/// Insert a character at the current cursor position (character-index, not byte-index).
/// Byte-safe: handles multi-byte UTF-8 characters (e.g., accented letters, CJK).
fn enter_char(s: &mut String, cursor: &mut usize, c: char) {
    let byte_pos = s.char_indices().nth(*cursor).map(|(i, _)| i).unwrap_or(s.len());
    s.insert(byte_pos, c);
    *cursor = (*cursor + 1).min(s.chars().count());
}

/// Delete the character immediately before the cursor.
/// If cursor is at position 0, this is a no-op.
fn delete_char(s: &mut String, cursor: &mut usize) {
    if *cursor == 0 {
        return;
    }
    let before: String = s.chars().take(*cursor - 1).collect();
    let after: String = s.chars().skip(*cursor).collect();
    *s = before + &after;
    *cursor = cursor.saturating_sub(1);
}

/// Compute a centered popup area within `area` using ratatui's Flex::Center layout.
/// Source: ratatui 0.29.0 examples/popup.rs
#[allow(dead_code)] // used in Wave 2 (TUI-05 detail overlay)
fn popup_area(area: Rect, percent_x: u16, percent_y: u16) -> Rect {
    let vertical = Layout::vertical([Constraint::Percentage(percent_y)]).flex(Flex::Center);
    let horizontal = Layout::horizontal([Constraint::Percentage(percent_x)]).flex(Flex::Center);
    let [area] = vertical.areas(area);
    let [area] = horizontal.areas(area);
    area
}

/// Build the detail overlay Paragraph widget for a selected PR.
/// Shows all available PullRequest fields in a bordered, centered popup.
fn build_detail_block<'a>(
    pr: &'a crate::models::PullRequest,
    jira: &crate::config::JiraConfig,
    panel_blue: Color,
    hint_color: Color,
) -> Paragraph<'a> {
    let jira_enabled = jira.base_url.is_some();
    // Colour palette for the detail view
    let lbl  = Style::default().fg(panel_blue);                              // "Title:", "Author:", …
    let val  = Style::default().fg(Color::Rgb(205, 214, 244));               // value text (Catppuccin text)
    let add_color = Color::Rgb(166, 227, 161);                               // green — additions
    let del_color = Color::Rgb(243, 139, 168);                               // red  — deletions
    let url_style = Style::default()
        .fg(Color::Rgb(116, 199, 236))
        .add_modifier(Modifier::UNDERLINED);

    let ci_color = match &pr.ci_status {
        Some(CiStatus::Success)                           => Color::Rgb(166, 227, 161),
        Some(CiStatus::Failed)                            => Color::Rgb(243, 139, 168),
        Some(CiStatus::Pending) | Some(CiStatus::Running) => Color::Rgb(249, 226, 175),
        None | Some(CiStatus::Cancelled)                  => Color::Rgb(88, 91, 112),
    };
    let review_color = match &pr.review_status {
        ReviewStatus::NeedsReview      => Color::Rgb(250, 179, 135),
        ReviewStatus::Approved         => Color::Rgb(166, 227, 161),
        ReviewStatus::ChangesRequested => Color::Rgb(243, 139, 168),
        ReviewStatus::Mixed            => Color::Rgb(249, 226, 175),
        ReviewStatus::InReview         => Color::Rgb(137, 220, 235),
    };

    let provider_icon = match pr.provider.as_str() {
        "github"    => "\u{E709} github",
        "bitbucket" => "\u{E703} bitbucket",
        other       => other,
    };

    let labels_joined = if pr.labels.is_empty() {
        "(none)".to_string()
    } else {
        pr.labels.join(", ")
    };
    let additions = pr.additions.map(|n| n.to_string()).unwrap_or_else(|| "?".to_string());
    let deletions = pr.deletions.map(|n| n.to_string()).unwrap_or_else(|| "?".to_string());

    let mut lines: Vec<Line<'a>> = vec![
        Line::from(vec![
            Span::styled("Title:    ", lbl),
            Span::styled(pr.title.clone(), val.add_modifier(Modifier::BOLD)),
        ]),
        Line::from(vec![
            Span::styled("Author:   ", lbl),
            Span::styled(pr.author.login.clone(), val),
        ]),
        Line::from(vec![
            Span::styled("URL:      ", lbl),
            Span::styled(pr.url.clone(), url_style),
        ]),
        Line::from(vec![
            Span::styled("Branch:   ", lbl),
            Span::styled(format!("{} \u{2192} {}", pr.head_branch, pr.base_branch), val),
        ]),
        Line::from(vec![
            Span::styled("Labels:   ", lbl),
            Span::styled(labels_joined, val),
        ]),
        Line::from(vec![
            Span::styled("Comments: ", lbl),
            Span::styled(pr.comment_count.to_string(), val),
        ]),
        Line::from(vec![
            Span::styled("Changes:  ", lbl),
            Span::styled(format!("+{additions}"), Style::default().fg(add_color)),
            Span::styled(" / ", val),
            Span::styled(format!("-{deletions}"), Style::default().fg(del_color)),
        ]),
        Line::from(vec![
            Span::styled("Review:   ", lbl),
            Span::styled(format_review_status(&pr.review_status), Style::default().fg(review_color)),
        ]),
        Line::from(vec![
            Span::styled("CI:       ", lbl),
            Span::styled(
                format!("{} {}", format_ci_status(&pr.ci_status),
                    match &pr.ci_status {
                        Some(CiStatus::Success)  => "passing",
                        Some(CiStatus::Failed)   => "failed",
                        Some(CiStatus::Pending)  => "pending",
                        Some(CiStatus::Running)  => "running",
                        Some(CiStatus::Cancelled) | None => "—",
                    }
                ),
                Style::default().fg(ci_color),
            ),
        ]),
        Line::from(vec![
            Span::styled("Age:      ", lbl),
            Span::styled(format_age(&pr.updated_at), val),
        ]),
        Line::from(vec![
            Span::styled("Provider: ", lbl),
            Span::styled(provider_icon, val),
        ]),
    ];

    if jira_enabled {
        if let Some(key) = extract_jira_key(&pr.title) {
            lines.push(Line::from(vec![
                Span::styled("Jira:     ", lbl),
                Span::styled(format!("{key}  (J to open)"), val),
            ]));
        }
    }

    let block = Block::default()
        .borders(Borders::ALL)
        .border_style(Style::default().fg(panel_blue))
        .title(Line::from(Span::styled(
            " PR Detail ",
            Style::default().fg(panel_blue).add_modifier(Modifier::BOLD),
        )))
        .title_bottom(Line::from(Span::styled(
            " Esc / Space to close ",
            Style::default().fg(hint_color),
        )));

    Paragraph::new(lines)
        .block(block)
        .wrap(Wrap { trim: false })
}

/// Extract the first Jira-style ticket key (e.g. "PROJ-123") from a PR title string.
#[allow(dead_code)] // used in Wave 2 (TUI-08/JIRA-01 Jira URL opening)
/// Pattern: one or more ASCII uppercase letters, followed by a hyphen, followed by one or more
/// ASCII digits. Returns the first match found, or None.
fn extract_jira_key(title: &str) -> Option<String> {
    let chars: Vec<char> = title.chars().collect();
    let mut i = 0;
    while i < chars.len() {
        if chars[i].is_ascii_uppercase() {
            let key_start = i;
            // Consume uppercase letters (project key prefix)
            while i < chars.len() && chars[i].is_ascii_uppercase() {
                i += 1;
            }
            let key_len = i - key_start;
            // Must be followed by a hyphen and at least one digit
            if key_len >= 1 && i < chars.len() && chars[i] == '-' {
                i += 1; // skip hyphen
                let num_start = i;
                while i < chars.len() && chars[i].is_ascii_digit() {
                    i += 1;
                }
                if i > num_start {
                    return Some(chars[key_start..i].iter().collect());
                }
            }
        } else {
            i += 1;
        }
    }
    None
}

/// Compute the indices of rows to display after applying draft, search, and profile filters.
/// Returns indices into `rows_data` / `is_draft` for rows that should be rendered.
///
/// `profiles_filter`: when `Some(&profile)`, additionally filters rows to those whose
/// repo (cells[4]) or status (cells[5]) match the profile's constraints.
fn compute_displayed_indices(
    rows_data: &[[String; 9]],
    repo_full_names: &[String],
    pr_providers: &[String],
    is_draft: &[bool],
    show_drafts: bool,
    search_query: &str,
    profiles_filter: Option<&crate::config::ProfileConfig>,
) -> Vec<usize> {
    rows_data
        .iter()
        .enumerate()
        .filter(|(idx, cells)| {
            if !show_drafts && *idx < is_draft.len() && is_draft[*idx] {
                return false;
            }
            // Profile filter: PR must match at least one filter group (OR between groups).
            // Within each group all set fields must match (AND).
            if let Some(profile) = profiles_filter {
                if !profile.filters.is_empty() {
                let full = repo_full_names.get(*idx).map(|s| s.to_lowercase()).unwrap_or_default();
                let prov = pr_providers.get(*idx).map(|s| s.to_lowercase()).unwrap_or_default();
                let status_cell = cells[5].to_lowercase();
                let matches_any = profile.filters.iter().any(|fg| {
                    if let Some(p) = &fg.provider {
                        if !p.is_empty() && prov != p.to_lowercase() { return false; }
                    }
                    if let Some(o) = &fg.org {
                        if !o.is_empty() {
                            let org_part = full.split('/').next().unwrap_or("");
                            if !org_part.contains(&o.to_lowercase()) { return false; }
                        }
                    }
                    if let Some(r) = &fg.repo {
                        if !r.is_empty() && !full.contains(&r.to_lowercase()) { return false; }
                    }
                    if let Some(s) = &fg.status {
                        if !s.is_empty() && !status_cell.contains(&s.to_lowercase()) { return false; }
                    }
                    true
                });
                if !matches_any {
                    return false;
                }
                }
            }
            if search_query.is_empty() {
                return true;
            }
            let q = search_query.to_lowercase();
            cells[2].to_lowercase().contains(&q)  // title
                || cells[3].to_lowercase().contains(&q) // author
                || cells[4].to_lowercase().contains(&q) // repo (short name for search)
        })
        .map(|(idx, _)| idx)
        .collect()
}

fn run_tui_loop(
    terminal: &mut Terminal<CrosstermBackend<std::io::Stdout>>,
    rx: mpsc::Receiver<(Vec<PullRequest>, Vec<String>)>,
    config: &crate::config::Config,
    initial_profile: Option<usize>,
) -> anyhow::Result<()> {
    // Catppuccin Mocha palette — defined once, reused across both loading and ready states.
    let header_style = Style::default()
        .add_modifier(Modifier::BOLD)
        .fg(Color::Rgb(203, 166, 247)); // Mocha Mauve
    let selected_style = Style::default()
        .bg(Color::Rgb(203, 166, 247))
        .fg(Color::Rgb(30, 30, 46))
        .add_modifier(Modifier::BOLD);
    let ci_color_success = Color::Rgb(166, 227, 161);
    let ci_color_failed  = Color::Rgb(243, 139, 168);
    let ci_color_pending = Color::Rgb(249, 226, 175);
    let ci_color_none    = Color::Rgb(88, 91, 112);
    let status_color_needs_review   = Color::Rgb(250, 179, 135);
    let status_color_approved       = Color::Rgb(166, 227, 161);
    let status_color_changes        = Color::Rgb(243, 139, 168);
    let status_color_mixed          = Color::Rgb(249, 226, 175);
    let status_color_in_review      = Color::Rgb(137, 220, 235);
    let draft_icon_color = Color::Rgb(116, 199, 236);
    let panel_blue       = Color::Rgb(137, 180, 250);
    let hint_color       = Color::Rgb(116, 199, 236);

    // Loading state
    const SPINNER: [&str; 10] = ["⠋", "⠙", "⠹", "⠸", "⠼", "⠴", "⠦", "⠧", "⠇", "⠏"];
    let mut spinner_tick: usize = 0;
    let mut last_tick = Instant::now();

    let error_color = Color::Rgb(243, 139, 168); // Catppuccin Maroon (matches changes-requested)

    // Ready state — populated once the channel delivers data.
    let mut prs: Option<Vec<PullRequest>>     = None;
    let mut provider_errors: Vec<String>      = Vec::new();
    let mut rows_data: Vec<[String; 9]>       = Vec::new();
    let mut repo_full_names: Vec<String>      = Vec::new();
    let mut pr_providers: Vec<String>         = Vec::new();
    let mut ci_styles: Vec<Style>             = Vec::new();
    let mut status_styles: Vec<Style>         = Vec::new();
    let mut is_draft: Vec<bool>               = Vec::new();
    let mut table_state = TableState::default();

    // AppMode state machine — gates key event dispatch.
    let mut mode = AppMode::Normal;
    let mut search_query = String::new();
    let mut cursor_pos: usize = 0;
    let mut show_drafts: bool = false;
    // Profile switching state — None = no filter (all PRs); Some(i) = active profile index.
    let mut active_profile_idx: Option<usize> = initial_profile;

    // Marquee / scroll state for the selected row's title column.
    let mut scroll_offset: usize = 0;
    let mut last_scroll_tick = Instant::now();
    const SCROLL_INTERVAL_MS: u64 = 200; // advance one char every 200 ms → ~5 chars/sec
    let mut last_selected: Option<usize> = None;

    // Filtered navigation state — updated by the draw closure each frame and consumed
    // by event handlers in the same iteration. Allows Enter/Space to resolve the correct
    // raw PR index even though displayed_indices is only computed inside the draw closure.
    let mut last_displayed_len: usize = 0;
    let mut displayed_snapshot: Vec<usize> = Vec::new();

    loop {
        // --- Poll channel while still loading ---
        if prs.is_none() {
            match rx.try_recv() {
                Ok((loaded, errors)) => {
                    provider_errors = errors;
                    // Pre-compute display data once.
                    for pr in &loaded {
                        let src = match pr.provider.as_str() {
                            "github"    => "\u{E709}".to_string(),
                            "bitbucket" => "\u{E703}".to_string(),
                            other       => other.to_string(),
                        };
                        rows_data.push([
                            src,
                            pr.number.to_string(),
                            pr.title.clone(),
                            pr.author.login.clone(),
                            pr.repo_full_name.split('/').last()
                                .unwrap_or(&pr.repo_full_name).to_string(),
                            format_review_status(&pr.review_status).to_string(),
                            format_ci_status(&pr.ci_status).to_string(),
                            pr.reviewers.len().to_string(),
                            format_age(&pr.updated_at),
                        ]);
                        repo_full_names.push(pr.repo_full_name.clone());
                        pr_providers.push(pr.provider.clone());
                        is_draft.push(pr.draft);
                        ci_styles.push(Style::default().fg(match &pr.ci_status {
                            Some(CiStatus::Success)                            => ci_color_success,
                            Some(CiStatus::Failed)                             => ci_color_failed,
                            Some(CiStatus::Pending) | Some(CiStatus::Running)  => ci_color_pending,
                            None | Some(CiStatus::Cancelled)                   => ci_color_none,
                        }));
                        status_styles.push(Style::default().fg(match &pr.review_status {
                            ReviewStatus::NeedsReview      => status_color_needs_review,
                            ReviewStatus::Approved         => status_color_approved,
                            ReviewStatus::ChangesRequested => status_color_changes,
                            ReviewStatus::Mixed            => status_color_mixed,
                            ReviewStatus::InReview         => status_color_in_review,
                        }));
                    }
                    if !loaded.is_empty() {
                        table_state.select(Some(0));
                    }
                    prs = Some(loaded);
                }
                Err(mpsc::TryRecvError::Empty) => {
                    // Advance spinner at ~100 ms.
                    if last_tick.elapsed() >= Duration::from_millis(100) {
                        spinner_tick = (spinner_tick + 1) % SPINNER.len();
                        last_tick = Instant::now();
                    }
                }
                Err(mpsc::TryRecvError::Disconnected) => {
                    return Err(anyhow::anyhow!("Provider fetch task ended unexpectedly"));
                }
            }
        }

        // --- Advance marquee offset ---
        let current_sel = table_state.selected();
        if current_sel != last_selected {
            scroll_offset = 0;
            last_selected = current_sel;
        }
        if prs.is_some() && last_scroll_tick.elapsed() >= Duration::from_millis(SCROLL_INTERVAL_MS) {
            scroll_offset = scroll_offset.wrapping_add(1);
            last_scroll_tick = Instant::now();
        }

        // --- Draw ---
        terminal.draw(|frame| {
            let area = frame.area();
            match &prs {
                // Loading screen
                None => {
                    let block = Block::default()
                        .borders(Borders::ALL)
                        .border_style(Style::default().fg(panel_blue))
                        .title(Line::from(Span::styled(
                            " prlens ",
                            Style::default().fg(panel_blue).add_modifier(Modifier::BOLD),
                        )))
                        .title_bottom(Line::from(Span::styled(
                            " q to cancel ",
                            Style::default().fg(hint_color),
                        )));
                    let inner = block.inner(area);
                    frame.render_widget(block, area);

                    let [_, mid, _] = Layout::default()
                        .direction(Direction::Vertical)
                        .constraints([Constraint::Fill(1), Constraint::Length(1), Constraint::Fill(1)])
                        .areas(inner);

                    frame.render_widget(
                        Paragraph::new(Line::from(vec![
                            Span::styled(
                                SPINNER[spinner_tick],
                                Style::default().fg(panel_blue).add_modifier(Modifier::BOLD),
                            ),
                            Span::raw("  Fetching pull requests…"),
                        ]))
                        .alignment(Alignment::Center),
                        mid,
                    );
                }

                // Empty result
                Some(loaded) if loaded.is_empty() => {
                    let block = Block::default()
                        .borders(Borders::ALL)
                        .border_style(Style::default().fg(panel_blue))
                        .title(Line::from(Span::styled(
                            " prlens — 0 PRs waiting ",
                            Style::default().fg(panel_blue).add_modifier(Modifier::BOLD),
                        )))
                        .title_bottom(Line::from(Span::styled(
                            " q to exit ",
                            Style::default().fg(hint_color),
                        )));
                    let inner = block.inner(area);
                    frame.render_widget(block, area);

                    let [_, mid, _] = Layout::default()
                        .direction(Direction::Vertical)
                        .constraints([Constraint::Fill(1), Constraint::Length(1), Constraint::Fill(1)])
                        .areas(inner);

                    frame.render_widget(
                        Paragraph::new("No pull requests found.").alignment(Alignment::Center),
                        mid,
                    );
                }

                // PR table
                Some(_) => {
                    // Split area: table on top, error bar at bottom (wraps on narrow terminals).
                    let (table_area, error_area) = if provider_errors.is_empty() {
                        (area, None)
                    } else {
                        // Compute how many terminal lines each error occupies when wrapped.
                        let usable_width = area.width.saturating_sub(3).max(1) as usize; // " ⚠ " prefix = 3 chars
                        let total_lines: u16 = provider_errors.iter()
                            .map(|e| ((e.chars().count() + usable_width - 1) / usable_width).max(1) as u16)
                            .sum();
                        let [top, bot] = Layout::default()
                            .direction(Direction::Vertical)
                            .constraints([Constraint::Fill(1), Constraint::Length(total_lines)])
                            .areas(area);
                        (top, Some(bot))
                    };
                    let area = table_area;

                    // Split off search bar area at bottom when in Searching mode.
                    let (table_area, search_bar_area) = if mode == AppMode::Searching {
                        let [top, bot] = Layout::vertical([
                            Constraint::Fill(1),
                            Constraint::Length(3),
                        ]).areas(area);
                        (top, Some(bot))
                    } else {
                        (area, None)
                    };
                    let area = table_area;

                    let widths = [
                        Constraint::Length(3),   // Src
                        Constraint::Length(6),   // #
                        Constraint::Fill(3),     // Title — primary real estate
                        Constraint::Fill(1),     // Author
                        Constraint::Fill(1),     // Repo
                        Constraint::Min(5),      // Status
                        Constraint::Length(3),   // CI
                        Constraint::Length(4),   // Rev.
                        Constraint::Length(5),   // Age
                    ];

                    let header = Row::new(["Src", "#", "Title", "Author", "Repo", "Status", "CI", "Rev.", "Age"])
                        .style(header_style);

                    // Compute exact title column width using the same layout ratatui applies.
                    // Table block has Borders::ALL → inner width = area.width - 2.
                    // Default column_spacing=1 → interleave Length(1) spacers between the 9 columns.
                    // Title is column index 2 → interleaved position 4.
                    let title_col_width = {
                        let inner = Rect { x: 0, y: 0, width: area.width.saturating_sub(2), height: 1 };
                        let mut lc: Vec<Constraint> = Vec::with_capacity(widths.len() * 2 - 1);
                        for (i, w) in widths.iter().enumerate() {
                            if i > 0 { lc.push(Constraint::Length(1)); }
                            lc.push(*w);
                        }
                        Layout::horizontal(lc).split(inner)[4].width as usize
                    };

                    // Compute the filtered/search-narrowed index list for this frame.
                    let active_profile = active_profile_idx.and_then(|i| config.profiles.get(i));
                    let displayed_indices =
                        compute_displayed_indices(&rows_data, &repo_full_names, &pr_providers, &is_draft, show_drafts, &search_query, active_profile);

                    let rows: Vec<Row> = displayed_indices
                        .iter()
                        .enumerate()
                        .map(|(display_pos, &raw_idx)| {
                            let cells = &rows_data[raw_idx];
                            let is_selected = table_state.selected() == Some(display_pos);

                            // Pre-compute the scrolled title string for the selected row.
                            // Only scroll when the title is clipped (longer than available column width).
                            let title_str = &cells[2];
                            let title_chars = title_str.chars().count();
                            let gap = "   "; // 3-space separator between repetitions
                            let padded: String = format!("{}{}", title_str, gap);
                            let cycle_len = padded.chars().count();
                            let needs_scroll = is_selected && title_chars > title_col_width;
                            let offset = if needs_scroll { scroll_offset % cycle_len } else { 0 };
                            let scrolled_title: String = padded
                                .chars()
                                .cycle()
                                .skip(offset)
                                .take(title_str.chars().count() + gap.len())
                                .collect();

                            let styled: Vec<Cell> = cells.iter().enumerate().map(|(i, c)| {
                                match i {
                                    2 if is_selected && is_draft[raw_idx] => Cell::from(Line::from(vec![
                                        Span::styled("\u{F040} ", Style::default().fg(draft_icon_color)),
                                        Span::raw(scrolled_title.clone()),
                                    ])),
                                    2 if is_selected => Cell::from(scrolled_title.clone()),
                                    2 if is_draft[raw_idx] => Cell::from(Line::from(vec![
                                        Span::styled("\u{F040} ", Style::default().fg(draft_icon_color)),
                                        Span::raw(c.clone()),
                                    ])),
                                    5 => Cell::from(c.as_str()).style(status_styles[raw_idx]),
                                    6 => Cell::from(c.as_str()).style(ci_styles[raw_idx]),
                                    _ => Cell::from(c.as_str()),
                                }
                            }).collect();
                            Row::new(styled)
                        })
                        .collect();

                    let visible_count = displayed_indices.len();

                    // Build title as multi-span Line with styled badges for profile and draft state.
                    let title_line = {
                        let base_text = format!(
                            " prlens — {visible_count} PR{} waiting ",
                            if visible_count == 1 { "" } else { "s" },
                        );
                        let mut spans = vec![
                            Span::styled(base_text, Style::default().fg(panel_blue).add_modifier(Modifier::BOLD)),
                        ];
                        if let Some(idx) = active_profile_idx {
                            if let Some(p) = config.profiles.get(idx) {
                                spans.push(Span::styled(
                                    format!(" {} ", p.name),
                                    Style::default()
                                        .fg(Color::Rgb(30, 30, 46))
                                        .bg(Color::Rgb(166, 227, 161))
                                        .add_modifier(Modifier::BOLD),
                                ));
                                spans.push(Span::styled(" ", Style::default().fg(panel_blue)));
                            }
                        }
                        // Draft badge: grey when hidden (default/quiet), amber when shown (active).
                        let (draft_label, draft_fg, draft_bg) = if show_drafts {
                            (" drafts on ", Color::Rgb(30, 30, 46), Color::Rgb(249, 226, 175))
                        } else {
                            (" drafts off ", Color::Rgb(205, 214, 244), Color::Rgb(88, 91, 112))
                        };
                        spans.push(Span::styled(
                            draft_label,
                            Style::default().fg(draft_fg).bg(draft_bg).add_modifier(Modifier::BOLD),
                        ));
                        spans.push(Span::styled(" ", Style::default().fg(panel_blue)));
                        Line::from(spans)
                    };

                    // Hint bar: keys in bright white/bold, descriptions in hint_color cyan.
                    let key_style  = Style::default().fg(Color::Rgb(205, 214, 244)).add_modifier(Modifier::BOLD);
                    let desc_style = Style::default().fg(hint_color);
                    let draft_label = if show_drafts { " hide drafts  " } else { " show drafts  " };
                    let mut hint_spans = vec![
                        Span::styled(" /", key_style), Span::styled(" search  ", desc_style),
                        Span::styled("Space", key_style), Span::styled(" detail  ", desc_style),
                        Span::styled("d", key_style), Span::styled(draft_label, desc_style),
                        Span::styled("j/k", key_style), Span::styled(" nav  ", desc_style),
                        Span::styled("Enter", key_style), Span::styled(" open  ", desc_style),
                        Span::styled("q", key_style), Span::styled(" quit ", desc_style),
                    ];
                    if config.jira.base_url.is_some() {
                        hint_spans.insert(6, Span::styled("J", key_style));
                        hint_spans.insert(7, Span::styled(" jira  ", desc_style));
                    }
                    if !config.profiles.is_empty() {
                        hint_spans.insert(6, Span::styled("Tab", key_style));
                        let profile_hint_label = match active_profile_idx.and_then(|i| config.profiles.get(i)) {
                            Some(p) => format!(" [{}]  ", p.name),
                            None    => " profile  ".to_string(),
                        };
                        hint_spans.insert(7, Span::styled(profile_hint_label, desc_style));
                    }
                    let hint_line = Line::from(hint_spans);
                    let table = Table::new(rows, widths)
                        .header(header)
                        .block(
                            Block::default()
                                .borders(Borders::ALL)
                                .border_style(Style::default().fg(panel_blue))
                                .title(title_line)
                                .title_bottom(hint_line),
                        )
                        .row_highlight_style(selected_style);

                    frame.render_stateful_widget(table, area, &mut table_state);

                    // Render detail overlay when ShowingDetail mode is active.
                    if mode == AppMode::ShowingDetail {
                        if let Some(display_i) = table_state.selected() {
                            if let Some(&raw_i) = displayed_snapshot.get(display_i) {
                                if let Some(pr) = prs.as_ref().and_then(|v| v.get(raw_i)) {
                                    let overlay_area = popup_area(area, 70, 80);
                                    frame.render_widget(Clear, overlay_area);
                                    frame.render_widget(
                                        build_detail_block(pr, &config.jira, panel_blue, hint_color),
                                        overlay_area,
                                    );
                                }
                            }
                        }
                    }

                    // Render search bar at bottom of table area when in Searching mode.
                    if mode == AppMode::Searching {
                        if let Some(sa) = search_bar_area {
                            let input_block = Block::default()
                                .borders(Borders::ALL)
                                .border_style(Style::default().fg(panel_blue))
                                .title(Line::from(Span::styled(
                                    " Search ",
                                    Style::default().fg(panel_blue),
                                )));
                            let input_paragraph = Paragraph::new(search_query.as_str())
                                .block(input_block);
                            frame.render_widget(input_paragraph, sa);
                            // Position the terminal cursor inside the search input.
                            frame.set_cursor_position(Position::new(
                                sa.x + cursor_pos as u16 + 1, // +1 for left border
                                sa.y + 1,                      // +1 for top border
                            ));
                        }
                    }

                    // Export the current frame's filtered snapshot so event handlers can
                    // resolve display positions to raw PR indices without access to this closure.
                    displayed_snapshot = displayed_indices.clone();
                    last_displayed_len = displayed_indices.len();

                    // Render provider error bar below table (red, one line each).
                    if let Some(err_area) = error_area {
                        let lines: Vec<Line> = provider_errors.iter()
                            .map(|e| Line::from(Span::styled(
                                format!(" ⚠ {e}"),
                                Style::default().fg(error_color),
                            )))
                            .collect();
                        frame.render_widget(
                            Paragraph::new(lines).wrap(Wrap { trim: false }),
                            err_area,
                        );
                    }
                }
            }
        })?;

        // --- Events ---
        // Use a short timeout while loading so the spinner stays responsive.
        // Also use a short timeout in Searching mode for sub-frame input latency (Pitfall 5).
        let timeout = if prs.is_none() || mode == AppMode::Searching {
            Duration::from_millis(50)
        } else {
            Duration::from_millis(200)
        };
        if event::poll(timeout)? {
            if let Event::Key(key) = event::read()? {
                if key.kind != KeyEventKind::Press { continue; }
                let pr_count = prs.as_ref().map_or(0, |v| v.len());
                match mode {
                    AppMode::Normal => match key.code {
                        KeyCode::Char('q') | KeyCode::Esc => break,
                        KeyCode::Char('/') => {
                            mode = AppMode::Searching;
                            search_query.clear();
                            cursor_pos = 0;
                        }
                        KeyCode::Char(' ') if last_displayed_len > 0 => {
                            mode = AppMode::ShowingDetail;
                        }
                        KeyCode::Char('d') => {
                            show_drafts = !show_drafts;
                            // Clamp selection after draft visibility change.
                            let new_len = compute_displayed_indices(
                                &rows_data, &repo_full_names, &pr_providers, &is_draft, show_drafts, &search_query,
                                active_profile_idx.and_then(|i| config.profiles.get(i)),
                            ).len();
                            if let Some(sel) = table_state.selected() {
                                if sel >= new_len && new_len > 0 {
                                    table_state.select(Some(new_len - 1));
                                } else if new_len == 0 {
                                    table_state.select(None);
                                }
                            }
                        }
                        KeyCode::Tab if !config.profiles.is_empty() => {
                            // Cycle: None → Some(0) → … → Some(last) → None.
                            active_profile_idx = match active_profile_idx {
                                None => Some(0),
                                Some(i) if i + 1 < config.profiles.len() => Some(i + 1),
                                Some(_) => None,
                            };
                            // Reset cursor to row 0 after profile change.
                            let new_profile = active_profile_idx.and_then(|i| config.profiles.get(i));
                            let new_len = compute_displayed_indices(
                                &rows_data, &repo_full_names, &pr_providers, &is_draft, show_drafts, &search_query, new_profile,
                            ).len();
                            if new_len == 0 {
                                table_state.select(None);
                            } else {
                                table_state.select(Some(0));
                            }
                        }
                        KeyCode::Char('J') if last_displayed_len > 0 => {
                            // Capital J: open Jira ticket for the selected PR.
                            if let Some(ref base_url) = config.jira.base_url {
                                if let Some(display_i) = table_state.selected() {
                                    let raw_i_opt = displayed_snapshot.get(display_i).copied()
                                        .or_else(|| prs.as_ref().and_then(|v| if display_i < v.len() { Some(display_i) } else { None }));
                                    if let Some(raw_i) = raw_i_opt {
                                        if let Some(pr) = prs.as_ref().and_then(|v| v.get(raw_i)) {
                                            if let Some(key_str) = extract_jira_key(&pr.title) {
                                                let jira_url = format!("{}/browse/{}", base_url.trim_end_matches('/'), key_str);
                                                let _ = open::that(jira_url);
                                            }
                                        }
                                    }
                                }
                            }
                        }
                        KeyCode::Char('j') | KeyCode::Down if last_displayed_len > 0 => {
                            let len = last_displayed_len;
                            let next = match table_state.selected() {
                                Some(i) if i + 1 < len => i + 1,
                                _ => 0,
                            };
                            table_state.select(Some(next));
                        }
                        KeyCode::Char('k') | KeyCode::Up if last_displayed_len > 0 => {
                            let len = last_displayed_len;
                            let prev = match table_state.selected() {
                                Some(0) | None => len.saturating_sub(1),
                                Some(i) => i - 1,
                            };
                            table_state.select(Some(prev));
                        }
                        KeyCode::Enter if last_displayed_len > 0 => {
                            if let Some(display_i) = table_state.selected() {
                                if let Some(&raw_i) = displayed_snapshot.get(display_i) {
                                    if let Some(pr) = prs.as_ref().and_then(|v| v.get(raw_i)) {
                                        let _ = open::that(&pr.url);
                                    }
                                }
                            }
                        }
                        _ => {}
                    },
                    AppMode::Searching => match key.code {
                        KeyCode::Esc => {
                            mode = AppMode::Normal;
                            search_query.clear();
                            cursor_pos = 0;
                            // Clamp selection after clearing search.
                            let new_len = compute_displayed_indices(
                                &rows_data, &repo_full_names, &pr_providers, &is_draft, show_drafts, &search_query,
                                active_profile_idx.and_then(|i| config.profiles.get(i)),
                            ).len();
                            if let Some(sel) = table_state.selected() {
                                if sel >= new_len && new_len > 0 {
                                    table_state.select(Some(new_len - 1));
                                } else if new_len == 0 {
                                    table_state.select(None);
                                }
                            }
                        }
                        KeyCode::Backspace => {
                            delete_char(&mut search_query, &mut cursor_pos);
                            // Clamp selection after narrowing filter.
                            let new_len = compute_displayed_indices(
                                &rows_data, &repo_full_names, &pr_providers, &is_draft, show_drafts, &search_query,
                                active_profile_idx.and_then(|i| config.profiles.get(i)),
                            ).len();
                            if let Some(sel) = table_state.selected() {
                                if sel >= new_len && new_len > 0 {
                                    table_state.select(Some(new_len - 1));
                                } else if new_len == 0 {
                                    table_state.select(None);
                                }
                            }
                        }
                        KeyCode::Char(c) => {
                            enter_char(&mut search_query, &mut cursor_pos, c);
                            // Clamp selection after narrowing filter.
                            let new_len = compute_displayed_indices(
                                &rows_data, &repo_full_names, &pr_providers, &is_draft, show_drafts, &search_query,
                                active_profile_idx.and_then(|i| config.profiles.get(i)),
                            ).len();
                            if let Some(sel) = table_state.selected() {
                                if sel >= new_len && new_len > 0 {
                                    table_state.select(Some(new_len - 1));
                                } else if new_len == 0 {
                                    table_state.select(None);
                                }
                            }
                        }
                        _ => {}
                    },
                    AppMode::ShowingDetail => match key.code {
                        KeyCode::Char(' ') | KeyCode::Esc => {
                            mode = AppMode::Normal;
                        }
                        KeyCode::Char('J') => {
                            if let Some(ref base_url) = config.jira.base_url {
                                if let Some(display_i) = table_state.selected() {
                                    if let Some(&raw_i) = displayed_snapshot.get(display_i) {
                                        if let Some(pr) = prs.as_ref().and_then(|v| v.get(raw_i)) {
                                            if let Some(key_str) = extract_jira_key(&pr.title) {
                                                let jira_url = format!("{}/browse/{}", base_url.trim_end_matches('/'), key_str);
                                                let _ = open::that(jira_url);
                                            }
                                        }
                                    }
                                }
                            }
                        }
                        _ => {}
                    },
                }
            }
        }
    }

    Ok(())
}

// --- Private formatting helpers (mirrors display.rs — kept local to avoid pub API churn) ---

fn format_review_status(status: &ReviewStatus) -> &'static str {
    match status {
        ReviewStatus::NeedsReview => "review",
        ReviewStatus::Approved => "approved",
        ReviewStatus::ChangesRequested => "changes",
        ReviewStatus::Mixed => "mixed",
        ReviewStatus::InReview => "in review",
    }
}

fn format_ci_status(ci: &Option<CiStatus>) -> &'static str {
    match ci {
        None => "\u{F068}",                                          // nf-fa-minus
        Some(CiStatus::Success) => "\u{F058}",                      // nf-fa-check_circle
        Some(CiStatus::Failed) => "\u{F057}",                       // nf-fa-times_circle
        Some(CiStatus::Pending) | Some(CiStatus::Running) => "\u{F110}", // nf-fa-spinner
        Some(CiStatus::Cancelled) => "\u{F068}",                    // nf-fa-minus
    }
}

fn format_age(dt: &chrono::DateTime<chrono::Utc>) -> String {
    let elapsed = chrono::Utc::now().signed_duration_since(*dt);
    let secs = elapsed.num_seconds();
    if secs < 0 {
        return "future".to_string();
    }
    if secs < 60 {
        return "now".to_string();
    }
    let mins = elapsed.num_minutes();
    if mins < 60 {
        return format!("{}m", mins);
    }
    let hours = elapsed.num_hours();
    if hours < 24 {
        return format!("{}h", hours);
    }
    let days = elapsed.num_days();
    if days < 7 {
        return format!("{}d", days);
    }
    let weeks = days / 7;
    if weeks < 8 {
        return format!("{}w", weeks);
    }
    let months = days / 30;
    if months < 12 {
        return format!("{}mo", months);
    }
    format!("{}y", days / 365)
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::models::{PrIdentifier, PrState, User};
    use chrono::{Duration, Utc};

    // Wave 0 test stubs — TUI-04, TUI-05, TUI-07, TUI-08, JIRA-01

    #[test]
    fn enter_char_unicode() {
        let mut s = "héllo".to_string();
        let mut cursor: usize = 5;
        enter_char(&mut s, &mut cursor, '!');
        assert_eq!(s, "héllo!");
        assert_eq!(cursor, 6);

        let mut s2 = String::new();
        let mut cursor2: usize = 0;
        enter_char(&mut s2, &mut cursor2, 'a');
        assert_eq!(s2, "a");
        assert_eq!(cursor2, 1);
    }

    #[test]
    fn delete_char_removes_last() {
        let mut s = "abc".to_string();
        let mut cursor: usize = 3;
        delete_char(&mut s, &mut cursor);
        assert_eq!(s, "ab");
        assert_eq!(cursor, 2);

        // cursor at 0 — no-op
        let mut s2 = "abc".to_string();
        let mut cursor2: usize = 0;
        delete_char(&mut s2, &mut cursor2);
        assert_eq!(s2, "abc");
        assert_eq!(cursor2, 0);
    }

    #[test]
    fn popup_area_contained() {
        let area = Rect { x: 0, y: 0, width: 80, height: 24 };
        let result = popup_area(area, 70, 80);
        assert!(result.x >= 0, "x should be >= 0");
        assert!(result.x + result.width <= 80, "x+width should fit in 80");
        assert!(result.y >= 0, "y should be >= 0");
        assert!(result.y + result.height <= 24, "y+height should fit in 24");
        assert!(result.width < 80, "width should be less than parent");
        assert!(result.height < 24, "height should be less than parent");
    }

    #[test]
    fn search_filter() {
        let rows_data: Vec<[String; 9]> = vec![
            ["".to_string(), "1".to_string(), "fix PROJ-123".to_string(), "bob".to_string(), "repo".to_string(), "".to_string(), "".to_string(), "0".to_string(), "1h".to_string()],
            ["".to_string(), "2".to_string(), "chore: cleanup".to_string(), "carol".to_string(), "repo".to_string(), "".to_string(), "".to_string(), "0".to_string(), "1h".to_string()],
            ["".to_string(), "3".to_string(), "feat: alice feature".to_string(), "dave".to_string(), "repo".to_string(), "".to_string(), "".to_string(), "0".to_string(), "1h".to_string()],
        ];
        let is_draft = vec![false, false, false];

        let indices = compute_displayed_indices(&rows_data, &[], &[], &is_draft, false, "alice", None);
        assert_eq!(indices, vec![2]);

        let indices_all = compute_displayed_indices(&rows_data, &[], &[], &is_draft, false, "", None);
        assert_eq!(indices_all, vec![0, 1, 2]);
    }

    #[test]
    fn draft_filter_hides_drafts() {
        let rows_data: Vec<[String; 9]> = vec![
            ["".to_string(), "1".to_string(), "PR one".to_string(), "a".to_string(), "r".to_string(), "".to_string(), "".to_string(), "0".to_string(), "1h".to_string()],
            ["".to_string(), "2".to_string(), "PR two draft".to_string(), "b".to_string(), "r".to_string(), "".to_string(), "".to_string(), "0".to_string(), "1h".to_string()],
            ["".to_string(), "3".to_string(), "PR three".to_string(), "c".to_string(), "r".to_string(), "".to_string(), "".to_string(), "0".to_string(), "1h".to_string()],
        ];
        let is_draft = vec![false, true, false];
        let indices = compute_displayed_indices(&rows_data, &[], &[], &is_draft, false, "", None);
        assert_eq!(indices, vec![0, 2]);
    }

    #[test]
    fn draft_filter_shows_drafts() {
        let rows_data: Vec<[String; 9]> = vec![
            ["".to_string(), "1".to_string(), "PR one".to_string(), "a".to_string(), "r".to_string(), "".to_string(), "".to_string(), "0".to_string(), "1h".to_string()],
            ["".to_string(), "2".to_string(), "PR two draft".to_string(), "b".to_string(), "r".to_string(), "".to_string(), "".to_string(), "0".to_string(), "1h".to_string()],
            ["".to_string(), "3".to_string(), "PR three".to_string(), "c".to_string(), "r".to_string(), "".to_string(), "".to_string(), "0".to_string(), "1h".to_string()],
        ];
        let is_draft = vec![false, true, false];
        let indices = compute_displayed_indices(&rows_data, &[], &[], &is_draft, true, "", None);
        assert_eq!(indices, vec![0, 1, 2]);
    }

    #[test]
    fn profile_filter_by_repo() {
        let rows_data: Vec<[String; 9]> = vec![
            ["".to_string(), "1".to_string(), "PR one".to_string(), "a".to_string(), "my-repo".to_string(), "review".to_string(), "".to_string(), "0".to_string(), "1h".to_string()],
            ["".to_string(), "2".to_string(), "PR two".to_string(), "b".to_string(), "other-repo".to_string(), "review".to_string(), "".to_string(), "0".to_string(), "1h".to_string()],
        ];
        let is_draft = vec![false, false];
        let profile = crate::config::ProfileConfig {
            name: "work".to_string(),
            filters: vec![crate::config::FilterGroup { repo: Some("my-repo".to_string()), ..Default::default() }],
        };
        let full_names = vec!["org/my-repo".to_string(), "org/other-repo".to_string()];
        let indices = compute_displayed_indices(&rows_data, &full_names, &[], &is_draft, false, "", Some(&profile));
        assert_eq!(indices, vec![0]);
    }

    #[test]
    fn profile_filter_by_org() {
        let rows_data: Vec<[String; 9]> = vec![
            ["".to_string(), "1".to_string(), "PR one".to_string(), "a".to_string(), "acme-service".to_string(), "review".to_string(), "".to_string(), "0".to_string(), "1h".to_string()],
            ["".to_string(), "2".to_string(), "PR two".to_string(), "b".to_string(), "other-service".to_string(), "review".to_string(), "".to_string(), "0".to_string(), "1h".to_string()],
        ];
        let is_draft = vec![false, false];
        let profile = crate::config::ProfileConfig {
            name: "acme".to_string(),
            filters: vec![crate::config::FilterGroup { org: Some("acme".to_string()), ..Default::default() }],
        };
        let full_names = vec!["acme/acme-service".to_string(), "other/other-service".to_string()];
        let indices = compute_displayed_indices(&rows_data, &full_names, &[], &is_draft, false, "", Some(&profile));
        assert_eq!(indices, vec![0]);
    }

    #[test]
    fn profile_filter_org_ignores_repo_name() {
        // A PR under "christoph.wedenig/dynatrace-app" must NOT match org = "dynatrace".
        // Only the org portion (before '/') is checked, not the full "org/repo" string.
        let rows_data: Vec<[String; 9]> = vec![
            ["".to_string(), "1".to_string(), "Private PR".to_string(), "a".to_string(), "dynatrace-app".to_string(), "review".to_string(), "".to_string(), "0".to_string(), "1h".to_string()],
            ["".to_string(), "2".to_string(), "DT PR".to_string(), "b".to_string(), "some-service".to_string(), "review".to_string(), "".to_string(), "0".to_string(), "1h".to_string()],
        ];
        let is_draft = vec![false, false];
        let profile = crate::config::ProfileConfig {
            name: "work".to_string(),
            filters: vec![crate::config::FilterGroup { org: Some("dynatrace".to_string()), ..Default::default() }],
        };
        let full_names = vec![
            "christoph.wedenig/dynatrace-app".to_string(),  // org does NOT start with dynatrace
            "Dynatrace-apps/some-service".to_string(),       // org starts with dynatrace
        ];
        let indices = compute_displayed_indices(&rows_data, &full_names, &[], &is_draft, false, "", Some(&profile));
        assert_eq!(indices, vec![1], "private repo whose repo-name contains filter keyword must not match");
    }

    #[test]
    fn profile_filter_none_passes_all() {
        let rows_data: Vec<[String; 9]> = vec![
            ["".to_string(), "1".to_string(), "PR one".to_string(), "a".to_string(), "repo-a".to_string(), "review".to_string(), "".to_string(), "0".to_string(), "1h".to_string()],
            ["".to_string(), "2".to_string(), "PR two".to_string(), "b".to_string(), "repo-b".to_string(), "review".to_string(), "".to_string(), "0".to_string(), "1h".to_string()],
        ];
        let is_draft = vec![false, false];
        let indices = compute_displayed_indices(&rows_data, &[], &[], &is_draft, false, "", None);
        assert_eq!(indices, vec![0, 1]);
    }

    #[test]
    fn jira_key_extraction() {
        assert_eq!(extract_jira_key("fix PROJ-123: description"), Some("PROJ-123".to_string()));
    }

    #[test]
    fn jira_key_extraction_none() {
        assert_eq!(extract_jira_key("no ticket here"), None);
    }

    #[test]
    fn jira_key_extraction_first() {
        assert_eq!(extract_jira_key("AB-1 and CD-2"), Some("AB-1".to_string()));
    }

    fn make_pr(provider: &str, number: u64, title: &str, url: &str) -> PullRequest {
        PullRequest {
            id: PrIdentifier {
                provider: provider.to_string(),
                owner: "acme".to_string(),
                repo: "widget".to_string(),
                number,
            },
            number,
            title: title.to_string(),
            url: url.to_string(),
            author: User {
                login: "alice".to_string(),
                display_name: None,
                avatar_url: None,
            },
            reviewers: vec![],
            repo_full_name: "acme/widget".to_string(),
            provider: provider.to_string(),
            head_branch: "feat/test".to_string(),
            base_branch: "main".to_string(),
            state: PrState::Open,
            review_status: ReviewStatus::NeedsReview,
            ci_status: None,
            draft: false,
            created_at: Utc::now(),
            updated_at: Utc::now() - Duration::hours(1),
            labels: vec![],
            comment_count: 0,
            additions: None,
            deletions: None,
        }
    }

    #[test]
    fn run_interactive_empty_does_not_panic() {
        // Non-TTY environment (test runner): run_interactive reads the channel and returns Ok(())
        // without entering raw mode.
        let (tx, rx) = std::sync::mpsc::sync_channel(1);
        tx.send((vec![], vec![])).unwrap();
        let result = run_interactive(rx, &crate::config::Config::default(), None);
        assert!(result.is_ok());
    }

    #[test]
    fn format_age_minutes() {
        let dt = Utc::now() - Duration::minutes(45);
        assert_eq!(format_age(&dt), "45m");
    }

    #[test]
    fn format_age_hours() {
        let dt = Utc::now() - Duration::hours(3);
        assert_eq!(format_age(&dt), "3h");
    }

    #[test]
    fn format_review_status_all_variants() {
        assert_eq!(format_review_status(&ReviewStatus::NeedsReview), "review");
        assert_eq!(format_review_status(&ReviewStatus::Approved), "approved");
        assert_eq!(format_review_status(&ReviewStatus::ChangesRequested), "changes");
        assert_eq!(format_review_status(&ReviewStatus::Mixed), "mixed");
        assert_eq!(format_review_status(&ReviewStatus::InReview), "in review");
    }

    #[test]
    fn format_ci_status_icons() {
        assert_eq!(format_ci_status(&None), "\u{F068}");
        assert_eq!(format_ci_status(&Some(CiStatus::Success)), "\u{F058}");
        assert_eq!(format_ci_status(&Some(CiStatus::Failed)), "\u{F057}");
        assert_eq!(format_ci_status(&Some(CiStatus::Pending)), "\u{F110}");
        assert_eq!(format_ci_status(&Some(CiStatus::Cancelled)), "\u{F068}");
    }

    #[test]
    fn provider_badge_github() {
        let pr = make_pr("github", 1, "Test", "https://github.com/acme/widget/pull/1");
        let src = match pr.provider.as_str() {
            "github" => "\u{E709}",
            "bitbucket" => "\u{E703}",
            other => other,
        };
        assert_eq!(src, "\u{E709}");
    }

    #[test]
    fn provider_badge_bitbucket() {
        let pr = make_pr("bitbucket", 1, "Test", "https://bitbucket.org/acme/widget/pull-requests/1");
        let src = match pr.provider.as_str() {
            "github" => "\u{E709}",
            "bitbucket" => "\u{E703}",
            other => other,
        };
        assert_eq!(src, "\u{E703}");
    }
}