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extern crate websocket;
extern crate rustc_serialize;

use message::Message;

use self::websocket::Sender;
use self::websocket::Receiver;
use self::websocket::WebSocketStream;
use self::websocket::DataFrame;
use self::websocket::Client;
use self::websocket::client::request::Url;

pub struct PBClient {
    client: websocket::client::Client<websocket::dataframe::DataFrame,
                                      websocket::client::sender::Sender<websocket::stream::WebSocketStream>,
                                      websocket::client::receiver::Receiver<websocket::stream::WebSocketStream>>
}

impl PBClient {
    pub fn new(token: &str) -> PBClient {

        let wss_url = format!("wss://stream.pushbullet.com/websocket/{}", token);
        let url = Url::parse(wss_url.as_ref()).unwrap();
        let request = Client::connect(url).unwrap();
        let response = request.send().unwrap();
        response.validate().unwrap();

        PBClient {
            client: response.begin()
        }
    }

    fn process_message(message: Result<websocket::Message, websocket::result::WebSocketError>) -> Option<Message> {
        let message = match message {
            Ok(m) => m,
            Err(e) => {
                println!("Error: {:?}", e);
                return None;
            }
        };

        if let websocket::Message::Text(message) = message {
                Message::parse(message.as_ref())
        }
        else {
            None
        }
    }

    pub fn messages<'a>(&'a mut self) -> Box<Iterator<Item=Message> + 'a> {
        let mut receiver = self.client.get_mut_reciever(); // there is a typo in the API
        Box::new(receiver.incoming_messages().filter_map(PBClient::process_message))
    }
}