use chrono::{DateTime, Utc};
use jid::JID;
use peanuts::{
    element::{FromElement, IntoElement},
    Element,
};

pub const XMLNS: &str = "urn:xmpp:delay";

#[derive(Debug, Clone)]
pub struct Delay {
    pub from: Option<JID>,
    pub stamp: DateTime<Utc>,
}

impl FromElement for Delay {
    fn from_element(mut element: Element) -> peanuts::element::DeserializeResult<Self> {
        element.check_name("delay")?;
        element.check_namespace(XMLNS)?;

        let from = element.attribute_opt("from")?;
        let stamp = element.attribute("stamp")?;

        Ok(Delay { from, stamp })
    }
}

impl IntoElement for Delay {
    fn builder(&self) -> peanuts::element::ElementBuilder {
        Element::builder("delay", Some(XMLNS))
            .push_attribute_opt("from", self.from.clone())
            .push_attribute("stamp", self.stamp.format("%C%y-%m-%dT%H:%M:%S%.3f%:z"))
    }
}