use plugins::Plugin;
use toml::Table;

use event::Event;

pub struct EchoPlugin {
    prefix: String
}

impl EchoPlugin {
    pub fn new (configuration: &Table) -> Box<Plugin> {
        let prefix = configuration.get("prefix")
                                  .and_then(|value| value.as_str())
                                  .unwrap_or("!echo ");

        Box::new(EchoPlugin {
            prefix: String::from(prefix)
        })
    }
}

impl Plugin for EchoPlugin {
    fn on_event (&self, event: Event) {
        match event {
            Event::Message { content: message, channel: channel, sender: sender } => {
                if message.starts_with(self.prefix.as_str()) {
                    let substring = String::from(&message[self.prefix.chars().count()..]);
                    println!("Echo: {:?}", substring);
                }
            }
            _ => ()
        }
    }
}