//! Handling of all client2server iq stanzas

use quick_xml::events::Event;

use lavina_core::room::RoomRegistry;
use proto_xmpp::bind::{BindResponse, Jid, Name, Resource, Server};
use proto_xmpp::client::{Iq, IqError, IqErrorType, IqType};
use proto_xmpp::disco::{Feature, Identity, InfoQuery, Item, ItemQuery};
use proto_xmpp::roster::RosterQuery;
use proto_xmpp::session::Session;

use crate::proto::IqClientBody;
use crate::XmppConnection;

use proto_xmpp::xml::ToXml;

impl<'a> XmppConnection<'a> {
    pub async fn handle_iq(&self, output: &mut Vec<Event<'static>>, iq: Iq<IqClientBody>) {
        match iq.body {
            IqClientBody::Bind(b) => {
                let req = Iq {
                    from: None,
                    id: iq.id,
                    to: None,
                    r#type: IqType::Result,
                    body: BindResponse(Jid {
                        name: Some(Name("darova".into())),
                        server: Server("localhost".into()),
                        resource: Some(Resource("kek".into())),
                    }),
                };
                req.serialize(output);
            }
            IqClientBody::Session(_) => {
                let req = Iq {
                    from: None,
                    id: iq.id,
                    to: None,
                    r#type: IqType::Result,
                    body: Session,
                };
                req.serialize(output);
            }
            IqClientBody::Roster(_) => {
                let req = Iq {
                    from: None,
                    id: iq.id,
                    to: None,
                    r#type: IqType::Result,
                    body: RosterQuery,
                };
                req.serialize(output);
            }
            IqClientBody::DiscoInfo(info) => {
                let response = disco_info(iq.to.as_deref(), &info);
                let req = Iq {
                    from: iq.to,
                    id: iq.id,
                    to: None,
                    r#type: IqType::Result,
                    body: response,
                };
                req.serialize(output);
            }
            IqClientBody::DiscoItem(item) => {
                let response = disco_items(iq.to.as_deref(), &item, self.rooms).await;
                let req = Iq {
                    from: iq.to,
                    id: iq.id,
                    to: None,
                    r#type: IqType::Result,
                    body: response,
                };
                req.serialize(output);
            }
            _ => {
                let req = Iq {
                    from: None,
                    id: iq.id,
                    to: None,
                    r#type: IqType::Error,
                    body: IqError {
                        r#type: IqErrorType::Cancel,
                    },
                };
                req.serialize(output);
            }
        }
    }
}

fn disco_info(to: Option<&str>, req: &InfoQuery) -> InfoQuery {
    let identity;
    let feature;
    match to {
        Some("localhost") => {
            identity = vec![Identity {
                category: "server".into(),
                name: None,
                r#type: "im".into(),
            }];
            feature = vec![
                Feature::new("http://jabber.org/protocol/disco#info"),
                Feature::new("http://jabber.org/protocol/disco#items"),
                Feature::new("iq"),
                Feature::new("presence"),
            ]
        }
        Some("rooms.localhost") => {
            identity = vec![Identity {
                category: "conference".into(),
                name: Some("Chat rooms".into()),
                r#type: "text".into(),
            }];
            feature = vec![
                Feature::new("http://jabber.org/protocol/disco#info"),
                Feature::new("http://jabber.org/protocol/disco#items"),
                Feature::new("http://jabber.org/protocol/muc"),
            ]
        }
        _ => {
            identity = vec![];
            feature = vec![];
        }
    };
    InfoQuery {
        node: None,
        identity,
        feature,
    }
}

async fn disco_items(to: Option<&str>, req: &ItemQuery, rooms: &RoomRegistry) -> ItemQuery {
    let item = match to {
        Some("localhost") => {
            vec![Item {
                jid: Jid {
                    name: None,
                    server: Server("rooms.localhost".into()),
                    resource: None,
                },
                name: None,
                node: None,
            }]
        }
        Some("rooms.localhost") => {
            let room_list = rooms.get_all_rooms().await;
            room_list
                .into_iter()
                .map(|room_info| Item {
                    jid: Jid {
                        name: Some(Name(room_info.id.into_inner())),
                        server: Server("rooms.localhost".into()),
                        resource: None,
                    },
                    name: None,
                    node: None,
                })
                .collect()
        }
        _ => vec![],
    };
    ItemQuery { item }
}