use anyhow::{Context, Result};
use ratatui::{DefaultTerminal, Frame};
use std::error::Error;
use std::time::Duration;
use ratatui::crossterm::event;
use ratatui::crossterm::event::{Event, KeyCode};
use ratatui::widgets::Paragraph;

pub fn start(root_path: std::path::PathBuf) -> Result<()> {
    println!("Starting the TUI editor at {:?}", root_path);
    let terminal = ratatui::init();
    let app_result = run(terminal, root_path).context("Failed to start the TUI editor.");
    ratatui::restore();
    app_result
}

pub fn run(
    mut terminal: DefaultTerminal,
    root_path: std::path::PathBuf,
) -> Result<()> {
    loop {
        terminal.draw(draw)?;
        if should_quit()? {
            break;
        }
    }
    Ok(())
}
fn should_quit() -> Result<bool> {
    if event::poll(Duration::from_millis(250)).context("event poll failed")? {
        if let Event::Key(key) = event::read().context("event read failed")? {
            return Ok(KeyCode::Char('q') == key.code);
        }
    }
    Ok(false)
}

fn draw(frame: &mut Frame) {
    let greeting = Paragraph::new("Hello World! (press 'q' to quit)");
    frame.render_widget(greeting, frame.area());
}