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extern crate notify;
extern crate notify_debouncer_mini;
use self::notify_debouncer_mini::{new_debouncer, notify::RecursiveMode};

use crate::stdout;
use std::path::Path;
use std::sync::mpsc::channel;
use std::time::Duration;

pub fn events(handler: impl Fn(&str), verbose: bool) {
    let (tx, rx) = channel();
    let mut debouncer =
        new_debouncer(Duration::from_millis(1000), None, tx).expect("Unable to create watcher");
    let watcher = debouncer.watcher();

    let current_dir = std::env::current_dir().expect("Unable to get current directory");

    if let Err(err) = watcher.watch(Path::new(&current_dir), RecursiveMode::Recursive) {
        println!("Unable to watch current directory {:?}", err);
    }

    stdout::info("Watching...");
    loop {
        match rx.recv() {
            Ok(debounced_evts) => {
                stdout::verbose(&format!("Events {:?}", debounced_evts), verbose);
                if let Ok(file_change_event) = debounced_evts {
                    file_change_event.iter().for_each(|event| {
                        if let Some(path_string) = event.path.to_str() {
                            handler(path_string);
                        } else {
                            stdout::error(&format!(
                                "failed to convert path {:?} to string",
                                event.path
                            ));
                        }
                    });
                }
            }

            Err(err) => {
                stdout::error(&format!("failed to receive event: {:?}", err));
            }
        }

        std::thread::sleep(std::time::Duration::from_millis(200));
    }
}