use std::{
	borrow::Cow,
	collections::{
		HashMap,
		HashSet,
	},
	io::Error,
};

use async_std::{
	sync::Arc,
	task,
};

use mailin_embedded::{
	Response,
	response::{
		INTERNAL_ERROR,
		INVALID_CREDENTIALS,
		NO_MAILBOX,
		OK

		self.data.append(buf.to_vec().as_mut());
		Ok(())
	}

	/// Attempt to send email, return temporary error if that fails
	fn data_end (&mut self) -> Response {
		let mut result = OK;
		task::block_on(async {
		smol::block_on(async {
			// relay mail
			if let Err(err) = self.relay_mail().await {
				result = INTERNAL_ERROR;
				// in case that fails - inform default recipient
				if let Err(err) = self.tg.debug(&format!("Sending emails failed:\n{err:?}")).await {
					// in case that also fails - write some logs and bail
					eprintln!("{err:?}");