use std::{error::Error, io, time::Duration};

use ratatui::{
    Terminal,
    backend::{Backend, CrosstermBackend},
    crossterm::{
        event::{self, DisableMouseCapture, EnableMouseCapture, Event},
        execute,
        terminal::{
            EnterAlternateScreen, LeaveAlternateScreen, disable_raw_mode,
            enable_raw_mode,
        },
    },
};

use crate::{app::App, ui};

pub fn run(app: App) -> Result<(), Box<dyn Error>> {
    // setup terminal
    enable_raw_mode()?;
    let mut stdout = io::stdout();
    execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
    let backend = CrosstermBackend::new(stdout);
    let mut terminal = Terminal::new(backend)?;

    // create app and run it
    let app_result = run_app(&mut terminal, app);

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

    if let Err(err) = app_result {
        println!("{err:?}");
    }

    Ok(())
}

// TODO: Implement save on quit
fn run_app<B: Backend>(
    terminal: &mut Terminal<B>,
    mut app: App,
) -> io::Result<()>
where
    io::Error: From<B::Error>,
{
    loop {
        terminal.draw(|frame| ui::draw(frame, &mut app))?;

        if event::poll(Duration::from_millis(10))? {
            if let Event::Key(key) = event::read()? {
                app.handle_key(key.code);
            }
        }

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

// pub fn run_app<B: Backend>(
//     terminal: &mut Terminal<B>,
//     mut app: App,
// ) -> io::Result<App>
// where
//     io::Error: From<B::Error>,
// {
//     loop {
//         terminal.draw(|f| ui(f, &app))?;
//
//         if let Event::Key(key) = event::read()? {
//             app.handle_key(key.code);
//             if app.should_quit {
//                 return Ok(app);
//             }
//         }
//     }
// }