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use super::option_setter::OptionSetter;
use super::connection::{HeartBeat, OwnedCredentials};
use super::header::*;
use super::session::{ConnectFuture, Session};

#[derive(Clone)]
pub struct SessionConfig {
    pub credentials: Option<OwnedCredentials>,
    pub heartbeat: HeartBeat,
    pub headers: HeaderList,
}

pub struct SessionBuilder {
    pub config: SessionConfig,
}

impl SessionBuilder {
    pub fn new() -> SessionBuilder {
        let config = SessionConfig {
            credentials: None,
            heartbeat: HeartBeat(0, 0),
            headers: header_list![
                ACCEPT_VERSION => "1.2",
                CONTENT_LENGTH => "0"
            ],
        };
        SessionBuilder { config: config }
    }

    pub fn build<T>(self, conn: ConnectFuture<T>) -> Session<T>
        where
            T: tokio_io::AsyncWrite + tokio_io::AsyncRead + Send + 'static,
    {
        Session::new(self.config, conn)
    }

    pub fn with<'b, O>(self, option_setter: O) -> SessionBuilder
        where
            O: OptionSetter<SessionBuilder>,
    {
        option_setter.set_option(self)
    }
}