use std::sync::mpsc;
use std::thread;
use std::time::Duration;

extern crate enocean;

fn main() {
    // Just to show how much enocean serial packets were received
    let mut nb_received = 0;
    // For now, this variable is hardcoded
    let port_name = "/dev/ttyUsb300".to_string(); //Get this from env?
                                                  // let port_name = "/dev/tty.usbserial-FTWTOH0A".to_string(); //Get this from env?
                                                  // Communication channels based on MPSC (1 to send, 1 to receive esp3 packets)
    let (enocean_emiter, enocean_event_receiver) = mpsc::channel();
    let (_enocean_command_receiver, enocean_commander) = mpsc::channel();

    // Create a thread to interact (both ways) with serial port
    // The interaction is achieved thanks to 2 channels (std::sync lib)
    let _enocean_listener = thread::spawn(move || {
        if let Err(e) = enocean::communicator::start(port_name, enocean_emiter, enocean_commander) {
            println!("ERROR when oopening serial port : {:?}", e);
        }
    });

    // Loop to check if we received something. If everything went well during "send phase",
    // we should receive a Reponse type ESP3 packet with ReturnCode 0 each time we send a command.
    loop {
        let message = enocean_event_receiver.try_recv();
        match message {
            Ok(esp3_packet) => {
                println! {"Received ESP3 packet : {}", esp3_packet};

                nb_received = nb_received + 1;
                println!("---> RECEIVED : {}", nb_received);
            }
            Err(ref e) if e == &std::sync::mpsc::TryRecvError::Empty => (),
            Err(e) => {
                eprintln!(
                    "Error while receiving encoean message from mpsc sender : {:?}",
                    e
                );
                return ();
            }
        }
        thread::sleep(Duration::from_millis(10));
    }
}