use async_std::net::TcpStream;

use kuska_handshake::async_std::BoxStream;
use kuska_sodiumoxide::crypto::{auth, sign::ed25519};
use kuska_ssb::{
    api::{
        dto::{content::Post, CreateHistoryStreamIn},
        ApiCaller,
    },
    discovery, keystore,
    keystore::OwnedIdentity,
    rpc::{RpcReader, RpcWriter},
};

use crate::error::GolgiError;
use crate::utils;

pub struct Sbot {
    id: String,
    public_key: ed25519::PublicKey,
    private_key: ed25519::SecretKey,
    address: String,
    // aka caps key (scuttleverse identifier)
    network_id: auth::Key,
    client: ApiCaller<TcpStream>,
    rpc_reader: RpcReader<TcpStream>,
}

impl Sbot {
    pub async fn init(ip_port: Option<String>, net_id: Option<String>) -> Result<Sbot, GolgiError> {
        let address;
        if ip_port.is_none() {
            address = "127.0.0.1:8008".to_string();
        } else {
            address = ip_port.unwrap();
        }

        let network_id;
        if net_id.is_none() {
            network_id = discovery::ssb_net_id();
        } else {
            network_id = auth::Key::from_slice(&hex::decode(net_id.unwrap()).unwrap()).unwrap();
        }

        let OwnedIdentity { pk, sk, id } = keystore::from_gosbot_local()
            .await
            .expect("couldn't read local secret");

        let socket = TcpStream::connect(&address)
            .await
            .map_err(|source| GolgiError::Io {
                source,
                context: "socket error; failed to initiate tcp stream connection".to_string(),
            })?;

        let handshake = kuska_handshake::async_std::handshake_client(
            &mut &socket,
            network_id.clone(),
            pk,
            sk.clone(),
            pk,
        )
        .await
        .map_err(GolgiError::Handshake)?;

        let (box_stream_read, box_stream_write) =
            BoxStream::from_handshake(socket.clone(), socket, handshake, 0x8000).split_read_write();

        let rpc_reader = RpcReader::new(box_stream_read);
        let client = ApiCaller::new(RpcWriter::new(box_stream_write));

        Ok(Self {
            id,
            public_key: pk,
            private_key: sk,
            address,
            network_id,
            client,
            rpc_reader,
        })
    }

    pub async fn whoami(&mut self) -> Result<String, GolgiError> {
        let req_id = self.client.whoami_req_send().await?;

        utils::get_async(&mut self.rpc_reader, req_id, utils::whoami_res_parse)
            .await
            .map(|whoami| whoami.id)
    }

    pub async fn publish_post(&mut self, post: Post) -> Result<String, GolgiError> {
        let req_id = self.client.publish_req_send(post).await?;

        utils::get_async(&mut self.rpc_reader, req_id, utils::publish_res_parse).await
    }

    async fn create_history_stream(&mut self, id: String) -> Result<(), GolgiError> {
        let args = CreateHistoryStreamIn::new(id);
        let req_id = self.client.create_history_stream_req_send(&args).await?;
        utils::print_source_until_eof(&mut self.rpc_reader, req_id, utils::feed_res_parse).await
    }
}