extern crate imap;
extern crate openssl;
extern crate base64;

use openssl::ssl::{SslContext, SslMethod};
use base64::{encode};
use imap::client::Client;
use imap::authenticator::Authenticator;

struct GmailOAuth2 {
    user: String,
    access_token: String
}

impl Authenticator for GmailOAuth2 {
    #[allow(unused_variables)]
    fn process(&self, data: String) -> String {
        encode(format!("user={}\x01auth=Bearer {}\x01\x01", self.user, self.access_token).as_bytes())
    }
}

fn main() {
    let gmail_auth = GmailOAuth2{
        user: String::from("sombody@gmail.com"),
        access_token: String::from("<access_token>")
    };
    let mut imap_socket = Client::secure_connect(("imap.gmail.com", 993), SslContext::new(SslMethod::Sslv23).unwrap()).unwrap();

    imap_socket.authenticate("XOAUTH2", gmail_auth).unwrap();

    match imap_socket.select("INBOX") {
		Ok(mailbox) => {
			println!("{}", mailbox);
		},
		Err(e) => println!("Error selecting INBOX: {}", e)
	};

	match imap_socket.fetch("2", "body[text]") {
		Ok(lines) => {
			for line in lines.iter() {
				print!("{}", line);
			}
		},
		Err(e) => println!("Error Fetching email 2: {}", e)
	};

	imap_socket.logout().unwrap();
}