use crate::Cursor;

use std::borrow::Cow;
use std::{
	borrow::Cow,
	sync::LazyLock,
};

use html_escape::encode_text;
use lazy_static::lazy_static;
use regex::{
	Regex,
	RegexBuilder,
};
use stacked_errors::{
	bail,
	Result,
};

lazy_static! {
	pub static ref RE_DOMAIN: Regex = Regex::new(r"^[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$").expect("Invalid domain regex");
	pub static ref RE_CLOSING: Regex = RegexBuilder::new(r"</[ \t]*(pre|code)[ \t]*>")
		.case_insensitive(true).build().expect("Invalid closing tag regex");
}
pub static RE_DOMAIN: LazyLock<Regex> = LazyLock::new(|| {
	Regex::new(r"^[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$").expect("Invalid domain regex")
});
pub static RE_CLOSING: LazyLock<Regex> = LazyLock::new(|| {
	RegexBuilder::new(r"</[ \t]*(pre|code)[ \t]*>")
		.case_insensitive(true).build().expect("Invalid closing tag regex")
});

/// Stores binary attachment data and metadata for Telegram messages.
/// The data is wrapped in a `Cursor<Vec<u8>>` for efficient streaming,
/// while `name` holds the filename or display name of the attachment.
#[derive(Debug)]
pub struct Attachment {
	pub data: Cursor<Vec<u8>>,