use crate::proptypes::write_string_prop;
use actix_web::{web::Data, HttpRequest};
use anyhow::{anyhow, Result};
use async_trait::async_trait;
use rustical_auth::AuthInfo;
use rustical_dav::resource::Resource;
use rustical_store::calendar::{CalendarStore, Event};
use std::sync::Arc;
use tokio::sync::RwLock;

pub struct EventResource<C: CalendarStore> {
    pub cal_store: Arc<RwLock<C>>,
    pub path: String,
    pub event: Event,
}

#[async_trait(?Send)]
impl<C: CalendarStore> Resource for EventResource<C> {
    type UriComponents = (String, String, String); // principal, calendar, event
    type MemberType = Self;

    fn get_path(&self) -> &str {
        &self.path
    }

    async fn get_members(&self) -> Result<Vec<Self::MemberType>> {
        Ok(vec![])
    }

    async fn acquire_from_request(
        req: HttpRequest,
        _auth_info: AuthInfo,
        uri_components: Self::UriComponents,
        _prefix: String,
    ) -> Result<Self> {
        let (_principal, cid, uid) = uri_components;

        let cal_store = req
            .app_data::<Data<RwLock<C>>>()
            .ok_or(anyhow!("no calendar store in app_data!"))?
            .clone()
            .into_inner();

        let event = cal_store.read().await.get_event(&cid, &uid).await?;

        Ok(Self {
            cal_store,
            event,
            path: req.path().to_string(),
        })
    }

    fn write_prop<W: std::io::Write>(
        &self,
        writer: &mut quick_xml::Writer<W>,
        prop: &str,
    ) -> Result<()> {
        match prop {
            "getetag" => {
                write_string_prop(writer, "getetag", &self.event.get_etag())?;
            }
            "calendar-data" => {
                write_string_prop(writer, "C:calendar-data", &self.event.get_ics())?;
            }
            "getcontenttype" => {
                write_string_prop(writer, "getcontenttype", "text/calendar;charset=utf-8")?;
            }
            _ => return Err(anyhow!("invalid prop!")),
        };
        Ok(())
    }

    fn list_dead_props() -> Vec<&'static str> {
        vec!["getetag", "calendar-data", "getcontenttype"]
    }
}