use crate::discord::api::Error;
use crate::discord::dto::{GatewayEvent, GatewayOpcode, Identify, IdentifyProperties};
use futures::future::IntoFuture;
use futures::SinkExt;
use reqwest::Identity;
use std::sync::mpsc::{channel, Receiver, Sender};
use tokio::net::TcpStream;
use tokio::stream::StreamExt;
use tokio_tungstenite::{connect_async, WebSocketStream};
use tungstenite::handshake::client::Request;
use tungstenite::{Message, WebSocket};

pub enum DiscordEvent {}

pub struct DiscordReceiver(pub Receiver<DiscordEvent>);

pub struct DiscordSocket {
    sender: Sender<DiscordEvent>,
    ws: WebSocketStream<
        tokio_tungstenite::stream::Stream<
            tokio::net::TcpStream,
            tokio_tls::TlsStream<tokio::net::TcpStream>,
        >,
    >,
    token: String,
}

pub async fn connect_discord_ws(
    url: String,
    auth: String,
) -> Result<(DiscordSocket, DiscordReceiver), Error> {
    let (s, r) = channel();
    let connect = connect_async(Request {
        url: url::Url::parse(&url).unwrap(),
        extra_headers: Some(vec![("Authorization".into(), auth.clone().into())]),
    })
    .await
    .unwrap();
    let (stream, resp) = connect;
    let status = resp.code;
    if status != 101 {
        return Err(Error::Failed(status));
    }

    let receiver = DiscordReceiver(r);
    let socket = DiscordSocket {
        sender: s,
        ws: stream,
        token: auth,
    };

    Ok((socket, receiver))
}

impl DiscordSocket {
    pub async fn start(&mut self) {
        while let Some(message) = self.ws.next().await {
            let msg = message.unwrap();

            match msg {
                Message::Text(ok) => {
                    let event = serde_json::from_str::<GatewayEvent>(&ok);
                    println!("event: {:?}", event)
                }

                _ => {
                    println!("something else");
                }
            }
        }
    }

    fn identify(&mut self) {
        let identify = Identify {
            token: self.token.clone(),
            properties: IdentifyProperties {
                os: "linux".to_string(),
                browser: "unredeemed".to_string(),
                device: "WebSocketStream<TcpStream>".to_string(),
            },
        };

        let value = serde_json::to_value(identify).unwrap();

        let event = GatewayEvent {
            opcode: GatewayOpcode::Identify,
            data: value,
            sequence_num: None,
            event_name: None,
        };

        let data = serde_json::to_vec(&event).unwrap();

        self.ws.send(Message::Binary(data));
    }
}