use crate::addressbook::AddressbookResourceService;
use crate::addressbook::resource::AddressbookResource;
use crate::principal::PrincipalResource;
use crate::{CardDavPrincipalUri, Error};
use async_trait::async_trait;
use axum::Router;
use rustical_dav::resource::{AxumMethods, ResourceService};
use rustical_store::auth::{AuthenticationProvider, Principal};
use rustical_store::{AddressbookStore, SubscriptionStore};
use std::sync::Arc;

pub struct PrincipalResourceService<
    A: AddressbookStore,
    AP: AuthenticationProvider,
    S: SubscriptionStore,
> {
    addr_store: Arc<A>,
    auth_provider: Arc<AP>,
    sub_store: Arc<S>,
}

impl<A: AddressbookStore, AP: AuthenticationProvider, S: SubscriptionStore> Clone
    for PrincipalResourceService<A, AP, S>
{
    fn clone(&self) -> Self {
        Self {
            addr_store: self.addr_store.clone(),
            auth_provider: self.auth_provider.clone(),
            sub_store: self.sub_store.clone(),
        }
    }
}

impl<A: AddressbookStore, AP: AuthenticationProvider, S: SubscriptionStore>
    PrincipalResourceService<A, AP, S>
{
    pub const fn new(addr_store: Arc<A>, auth_provider: Arc<AP>, sub_store: Arc<S>) -> Self {
        Self {
            addr_store,
            auth_provider,
            sub_store,
        }
    }
}

#[async_trait]
impl<A: AddressbookStore, AP: AuthenticationProvider, S: SubscriptionStore> ResourceService
    for PrincipalResourceService<A, AP, S>
{
    type PathComponents = (String,);
    type MemberType = AddressbookResource;
    type Resource = PrincipalResource;
    type Error = Error;
    type Principal = Principal;
    type PrincipalUri = CardDavPrincipalUri;

    const DAV_HEADER: &str = "1, 3, access-control, addressbook";

    async fn get_resource(
        &self,
        (principal,): &Self::PathComponents,
        _show_deleted: bool,
    ) -> Result<Self::Resource, Self::Error> {
        let user = self
            .auth_provider
            .get_principal(principal)
            .await?
            .ok_or(crate::Error::NotFound)?;
        Ok(PrincipalResource {
            members: self.auth_provider.list_members(&user.id).await?,
            principal: user,
        })
    }

    async fn get_members(
        &self,
        (principal,): &Self::PathComponents,
    ) -> Result<Vec<Self::MemberType>, Self::Error> {
        let addressbooks = self.addr_store.get_addressbooks(principal).await?;
        Ok(addressbooks
            .into_iter()
            .map(AddressbookResource::from)
            .collect())
    }

    fn axum_router<State: Send + Sync + Clone + 'static>(self) -> Router<State> {
        Router::new()
            .nest(
                "/{addressbook_id}",
                AddressbookResourceService::new(self.addr_store.clone(), self.sub_store.clone())
                    .axum_router(),
            )
            .route_service("/", self.axum_service())
    }
}

impl<A: AddressbookStore, AP: AuthenticationProvider, S: SubscriptionStore> AxumMethods
    for PrincipalResourceService<A, AP, S>
{
}