/*
 * Copyright (c) 2022-2024 Niko Bonnieure, Par le Peuple, NextGraph.org developers
 * All rights reserved.
 * Licensed under the Apache License, Version 2.0
 * <LICENSE-APACHE2 or http://www.apache.org/licenses/LICENSE-2.0>
 * or the MIT license <LICENSE-MIT or http://opensource.org/licenses/MIT>,
 * at your option. All files in the project carrying such
 * notice may not be copied, modified, or distributed except
 * according to those terms.
*/
use crate::broker::{ServerConfig, BROKER};
use crate::connection::NoiseFSM;
use crate::types::*;
use crate::{actor::*, types::ProtocolMessage};
use async_std::sync::Mutex;
use ng_repo::errors::*;
use ng_repo::log::*;
use ng_repo::repo::Repo;
use ng_repo::types::*;
use serde::{Deserialize, Serialize};
use std::sync::Arc;

impl PinRepo {
    pub fn get_actor(&self, id: i64) -> Box<dyn EActor> {
        Actor::<PinRepo, RepoOpened>::new_responder(id)
    }
    pub fn from_repo(repo: &Repo, broker_id: &DirectPeerId) -> PinRepo {
        let overlay =
            OverlayAccess::ReadWrite((repo.store.inner_overlay(), repo.store.outer_overlay()));
        let mut rw_topics = Vec::with_capacity(repo.branches.len());
        let mut ro_topics = vec![];
        for (_, branch) in repo.branches.iter() {
            if let Some(privkey) = &branch.topic_priv_key {
                rw_topics.push(PublisherAdvert::new(
                    branch.topic,
                    privkey.clone(),
                    *broker_id,
                ));
            } else {
                ro_topics.push(branch.topic);
            }
        }
        PinRepo::V0(PinRepoV0 {
            hash: repo.id.into(),
            overlay,
            // TODO: overlay_root_topic
            overlay_root_topic: None,
            expose_outer: false,
            peers: vec![],
            max_peer_count: 0,
            //allowed_peers: vec![],
            ro_topics,
            rw_topics,
        })
    }
}

impl TryFrom<ProtocolMessage> for PinRepo {
    type Error = ProtocolError;
    fn try_from(msg: ProtocolMessage) -> Result<Self, Self::Error> {
        let req: ClientRequestContentV0 = msg.try_into()?;
        if let ClientRequestContentV0::PinRepo(a) = req {
            Ok(a)
        } else {
            log_debug!("INVALID {:?}", req);
            Err(ProtocolError::InvalidValue)
        }
    }
}

impl From<PinRepo> for ProtocolMessage {
    fn from(msg: PinRepo) -> ProtocolMessage {
        let overlay = match msg {
            PinRepo::V0(ref v0) => v0.overlay.overlay_id_for_client_protocol_purpose().clone(),
        };
        ProtocolMessage::from_client_request_v0(ClientRequestContentV0::PinRepo(msg), overlay)
    }
}

impl TryFrom<ProtocolMessage> for RepoOpened {
    type Error = ProtocolError;
    fn try_from(msg: ProtocolMessage) -> Result<Self, Self::Error> {
        let res: ClientResponseContentV0 = msg.try_into()?;
        if let ClientResponseContentV0::RepoOpened(a) = res {
            Ok(a)
        } else {
            log_debug!("INVALID {:?}", res);
            Err(ProtocolError::InvalidValue)
        }
    }
}

impl From<RepoOpened> for ProtocolMessage {
    fn from(res: RepoOpened) -> ProtocolMessage {
        ClientResponseContentV0::RepoOpened(res).into()
    }
}

impl Actor<'_, RepoPinStatusReq, RepoPinStatus> {}

#[async_trait::async_trait]
impl EActor for Actor<'_, PinRepo, RepoOpened> {
    async fn respond(
        &mut self,
        msg: ProtocolMessage,
        fsm: Arc<Mutex<NoiseFSM>>,
    ) -> Result<(), ProtocolError> {
        let req = PinRepo::try_from(msg)?;

        //TODO implement all the server side logic
        let broker = BROKER.read().await;
        let res = broker.get_server_broker()?.pin_repo(
            req.overlay(),
            req.hash(),
            req.ro_topics(),
            req.rw_topics(),
        );

        fsm.lock()
            .await
            .send_in_reply_to(res.into(), self.id())
            .await?;
        Ok(())
    }
}