use crossterm::event::{KeyCode, KeyEvent, KeyModifiers};

use super::app::App;

/// Handles the key events and updates the state of [`App`].
pub fn handle_key_events(key_event: KeyEvent, app: &mut App) {
    match key_event.code {
        // Exit application on `ESC` or `q`.
        KeyCode::Esc | KeyCode::Char('q') => {
            app.quit();
        }
        // Exit application on `Ctrl-C`.
        KeyCode::Char('c') | KeyCode::Char('C') => {
            if key_event.modifiers == KeyModifiers::CONTROL {
                app.quit();
            }
        }
        // Category change.
        KeyCode::Left => {
            app.decrement_category();
        }
        KeyCode::Right => {
            app.increment_category();
        }
        // Selection change.
        KeyCode::Up => {
            app.decrement_selection();
        }
        KeyCode::Down => {
            app.increment_selection();
        }
        // Other handlers you could add here.
        _ => {}
    }
}