nexql-mcp 0.1.4

//! `nexql-mcp tui` — interactive profile editor + multi-client wiring.

mod app;
mod ui;

use std::io;
use std::path::PathBuf;
use std::time::Duration;

use crossterm::event::{self, Event, KeyEventKind};
use crossterm::execute;
use crossterm::terminal::{
    EnterAlternateScreen, LeaveAlternateScreen, disable_raw_mode, enable_raw_mode,
};
use nexql_conn::ConfigFile;
use ratatui::Terminal;
use ratatui::backend::CrosstermBackend;

use app::App;

const TICK: Duration = Duration::from_millis(50);

pub async fn run(config_path: Option<PathBuf>) -> Result<(), Box<dyn std::error::Error>> {
    let config_path = config_path
        .or_else(ConfigFile::default_path)
        .ok_or("could not resolve a config path — set $HOME or $NEXQL_MCP_CONFIG")?;

    enable_raw_mode()?;
    let mut stdout = io::stdout();
    execute!(stdout, EnterAlternateScreen)?;
    let backend = CrosstermBackend::new(stdout);
    let mut terminal = Terminal::new(backend)?;

    let result = run_loop(&mut terminal, config_path).await;

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

    result
}

async fn run_loop(
    terminal: &mut Terminal<CrosstermBackend<io::Stdout>>,
    config_path: PathBuf,
) -> Result<(), Box<dyn std::error::Error>> {
    let mut app = App::new(config_path);

    loop {
        app.poll_test();
        terminal.draw(|frame| ui::draw(frame, &app))?;

        if event::poll(TICK)? {
            if let Event::Key(key) = event::read()? {
                if key.kind == KeyEventKind::Press {
                    app.on_key(key);
                }
            }
        }

        if app.should_quit {
            return Ok(());
        }
    }
}