use std::error::Error;

use crossterm::event::{KeyCode, KeyModifiers, read};
use tokio::sync::mpsc::Sender;

#[derive(PartialEq)]
pub enum Event {
    Terminate,
    KeyPress(char),
    Backspace,
    Render,
    ForceRender,
}

// TODO
// - [ ] Pause on focus lost
// - [ ] Invalidate on paste
pub async fn handle_input(sender: Sender<Event>) -> Result<(), Box<dyn Error>> {
    match read()? {
        //crossterm::event::Event::FocusGained => todo!(),
        //crossterm::event::Event::FocusLost => todo!(),
        //crossterm::event::Event::Paste(_) => todo!(),
        crossterm::event::Event::Resize(_, _) => sender.send(Event::ForceRender).await?,
        crossterm::event::Event::Key(key_event) => match (key_event.code, key_event.modifiers) {
            (KeyCode::Char('c'), KeyModifiers::CONTROL) => sender.send(Event::Terminate).await?,
            (KeyCode::Backspace, _) => sender.send(Event::Backspace).await?,
            (KeyCode::Char(c), _) => sender.send(Event::KeyPress(c)).await?,
            _ => (),
        },
        _ => (),
    }
    return Ok(());
}