kanbars 0.4.0

Lightning-fast terminal kanban board for JIRA
use crossterm::{
    event::{self, DisableMouseCapture, EnableMouseCapture, Event, KeyCode},
    execute,
    terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
};
use ratatui::{
    backend::{Backend, CrosstermBackend},
    Terminal,
};
use std::{error::Error, io, time::{Duration, Instant}};

mod cli;
mod config;
mod jira;
mod jira_api;
mod model;
mod ui;

use crate::cli::Args;
use crate::config::Config;
use crate::jira::fetch_tickets;
use crate::model::StatusGroups;
use crate::ui::{draw_ui, AppState, UiMode};
use clap::Parser;

fn main() -> Result<(), Box<dyn Error>> {
    let args = Args::parse();
    let mut config = Config::load();
    
    // Handle --init flag
    if args.init {
        println!("Creating sample config at: {:?}", Config::config_path());
        let sample_config = Config::default();
        sample_config.save()?;
        println!("Config file created! Edit it and add your JIRA credentials.");
        return Ok(());
    }
    
    // Override config with CLI args
    if let Some(ref url) = args.url {
        config.jira.url = Some(url.clone());
    }
    config.query.jql = args.build_jql(&config.query.jql);
    
    // Handle --once mode (display and exit)
    if args.once {
        let tickets = fetch_tickets(&config)?;
        let columns = StatusGroups::from_tickets(tickets);
        
        // Simple non-TUI output for use with watch
        println!("🦀 KANBARS - JIRA Board\n");
        columns.print_simple();
        return Ok(());
    }
    
    // Fetch tickets before setting up terminal
    let tickets = fetch_tickets(&config)?;
    let columns = StatusGroups::from_tickets(tickets);
    
    enable_raw_mode()?;
    let mut stdout = io::stdout();
    execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
    let backend = CrosstermBackend::new(stdout);
    let mut terminal = Terminal::new(backend)?;

    let res = run_app(&mut terminal, columns, &config, args.refresh);

    disable_raw_mode()?;
    execute!(
        terminal.backend_mut(),
        LeaveAlternateScreen,
        DisableMouseCapture
    )?;
    terminal.show_cursor()?;

    if let Err(err) = res {
        println!("{:?}", err)
    }

    Ok(())
}

fn run_app<B: Backend>(
    terminal: &mut Terminal<B>,
    mut columns: StatusGroups,
    config: &Config,
    refresh_seconds: u64,
) -> Result<(), Box<dyn Error>> {
    let mut last_refresh = Instant::now();
    let refresh_interval = Duration::from_secs(refresh_seconds);
    let mut paused = false;
    let mut last_update_time = chrono::Local::now();
    
    let mut app_state = AppState {
        mode: UiMode::Board,
        selected_index: 0,  // Global index across all tickets
        detail_ticket: None,
        detail_scroll: 0,
        detail_max_scroll: 0,
    };
    
    loop {
        // Draw UI with current state
        terminal.draw(|f| draw_ui(f, &columns, Some(&last_update_time), paused, refresh_seconds, &mut app_state))?;
        
        // Check for keyboard input with timeout
        let timeout = if paused {
            Duration::from_millis(100) // Short timeout when paused
        } else {
            // Calculate time until next refresh
            let elapsed = last_refresh.elapsed();
            if elapsed >= refresh_interval {
                Duration::from_millis(0) // Refresh immediately
            } else {
                refresh_interval - elapsed
            }
        };
        
        if event::poll(timeout)? {
            if let Event::Key(key) = event::read()? {
                match app_state.mode {
                    UiMode::Board => {
                        match key.code {
                            KeyCode::Char('q') | KeyCode::Esc => return Ok(()),
                            KeyCode::Char('r') => {
                                // Manual refresh
                                match fetch_tickets(config) {
                                    Ok(tickets) => {
                                        columns = StatusGroups::from_tickets(tickets);
                                        last_update_time = chrono::Local::now();
                                        last_refresh = Instant::now();
                                    }
                                    Err(e) => {
                                        // TODO: Show error in UI
                                        eprintln!("Refresh failed: {}", e);
                                    }
                                }
                            }
                            KeyCode::Char('p') => {
                                // Toggle pause
                                paused = !paused;
                            }
                            // Simple navigation - up/down cycles through all tickets
                            KeyCode::Up | KeyCode::Char('k') => {
                                let total_tickets = columns.total_tickets();
                                if app_state.selected_index > 0 {
                                    app_state.selected_index -= 1;
                                } else if total_tickets > 0 {
                                    // Wrap around to last ticket
                                    app_state.selected_index = total_tickets - 1;
                                }
                            }
                            KeyCode::Down | KeyCode::Char('j') => {
                                let total_tickets = columns.total_tickets();
                                if total_tickets > 0 {
                                    app_state.selected_index = (app_state.selected_index + 1) % total_tickets;
                                }
                            }
                            KeyCode::Enter => {
                                // Enter detail view for selected ticket
                                if let Some(ticket) = columns.get_ticket_by_index(app_state.selected_index) {
                                    // Try to fetch full details
                                    let mut detailed_ticket = ticket.clone();
                                    if detailed_ticket.description.is_none() {
                                        // Only fetch if we don't already have details
                                        match jira_api::fetch_ticket_details(config, &ticket.key) {
                                            Ok(full_ticket) => {
                                                detailed_ticket = full_ticket;
                                            }
                                            Err(e) => {
                                                // Store error message in description field for display
                                                detailed_ticket.description = Some(format!(
                                                    "[Error fetching details]\n\n{}", 
                                                    e.to_string()
                                                ));
                                            }
                                        }
                                    }
                                    app_state.detail_ticket = Some(detailed_ticket);
                                    app_state.detail_scroll = 0;
                                    app_state.mode = UiMode::Detail;
                                }
                            }
                            _ => {}
                        }
                    }
                    UiMode::Detail => {
                        match key.code {
                            KeyCode::Char('q') | KeyCode::Esc => {
                                // Return to board view
                                app_state.mode = UiMode::Board;
                                app_state.detail_ticket = None;
                            }
                            KeyCode::Up | KeyCode::Char('k') => {
                                if app_state.detail_scroll > 0 {
                                    app_state.detail_scroll -= 1;
                                }
                            }
                            KeyCode::Down | KeyCode::Char('j') => {
                                if app_state.detail_scroll < app_state.detail_max_scroll {
                                    app_state.detail_scroll += 1;
                                }
                            }
                            KeyCode::PageUp => {
                                app_state.detail_scroll = app_state.detail_scroll.saturating_sub(10);
                            }
                            KeyCode::PageDown => {
                                app_state.detail_scroll = (app_state.detail_scroll + 10).min(app_state.detail_max_scroll);
                            }
                            _ => {}
                        }
                    }
                }
            }
        } else if !paused && last_refresh.elapsed() >= refresh_interval {
            // Auto-refresh
            match fetch_tickets(config) {
                Ok(tickets) => {
                    columns = StatusGroups::from_tickets(tickets);
                    last_update_time = chrono::Local::now();
                    last_refresh = Instant::now();
                }
                Err(e) => {
                    // TODO: Show error in UI
                    eprintln!("Auto-refresh failed: {}", e);
                    last_refresh = Instant::now(); // Reset timer even on error
                }
            }
        }
    }
}