//! Handling of all client2server presence stanzas

use quick_xml::events::Event;

use lavina_core::prelude::*;
use lavina_core::room::RoomId;
use proto_xmpp::bind::{Jid, Server};
use proto_xmpp::client::Presence;
use proto_xmpp::xml::{Ignore, ToXml};

use crate::XmppConnection;

impl<'a> XmppConnection<'a> {
    pub async fn handle_presence(&mut self, output: &mut Vec<Event<'static>>, p: Presence<Ignore>) -> Result<()> {
        let response = if p.to.is_none() {
            Presence::<()> {
                to: Some(Jid {
                    name: Some(self.user.xmpp_name.clone()),
                    server: Server("localhost".into()),
                    resource: Some(self.user.xmpp_resource.clone()),
                }),
                from: Some(Jid {
                    name: Some(self.user.xmpp_name.clone()),
                    server: Server("localhost".into()),
                    resource: Some(self.user.xmpp_resource.clone()),
                }),
                ..Default::default()
            }
        } else if let Some(Jid {
            name: Some(name),
            server,
            resource: Some(resource),
        }) = p.to
        {
            let a = self.user_handle.join_room(RoomId::from(name.0.clone())?).await?;
            Presence::<()> {
                to: Some(Jid {
                    name: Some(self.user.xmpp_name.clone()),
                    server: Server("localhost".into()),
                    resource: Some(self.user.xmpp_resource.clone()),
                }),
                from: Some(Jid {
                    name: Some(name.clone()),
                    server: Server("rooms.localhost".into()),
                    resource: Some(self.user.xmpp_muc_name.clone()),
                }),
                ..Default::default()
            }
        } else {
            Presence::<()>::default()
        };
        response.serialize(output);
        Ok(())
    }
}