use std::io;

use modules::Module;
use toml::Table;

use {MessageSender, Message, User};

use std::sync::Arc;
use std::sync::mpsc::Sender;
use event::Event;

pub struct StdinModule {}

pub struct StdinMessageSender {
    name: String
}

impl MessageSender for StdinMessageSender {
    fn send_message (&self, message: &str) {
        debug!("Send message to stdout: {:?}", message);
        println!("{}: {}", self.name, message);
    }
}

impl StdinModule {
    pub fn new (configuration: &Table) -> Box<Module> {
        Box::new(StdinModule {})
    }
}

impl Module for StdinModule {
    fn produce_events<'a>(&'a self, sender: Sender<Arc<Event>>) {
        loop {
            let mut input = String::new();
            match io::stdin().read_line(&mut input) {
                Ok(n) => {
                    let message = Message {
                        author: User {
                            name: String::from("Dave"),
                            sender: Box::new(StdinMessageSender {
                                name: String::from("Dave")
                            })
                        },
                        content: input,
                        channel: None
                    };

                    match sender.send(Arc::new(Event::Message { message: message })) {
                        Err(err) => error!("Error sending message event: {:?}", err),
                        Ok(_) => {}
                    }
                }
                Err(error) => error!("error: {}", error),
            }
        }
    }
}