use rn2903::{bytes_to_string, Rn2903};
use std::env::args;
use std::process::exit;
use std::thread;
use std::time::Duration;
use std::time::{SystemTime, UNIX_EPOCH};

fn main() {
    let args: Vec<_> = args().collect();
    if args.len() <= 1 {
        eprintln!("rn2903_lora_packet_tx <serial port>");
        eprintln!("\tSend LoRa packets with the current UNIX time every 5 seconds.");
        exit(1);
    }

    let mut txvr = Rn2903::new_at(&args[1]).expect("Could not open device. Error");
    println!(
        "Successfully connected. Version: {}",
        txvr.system_version()
            .expect("Could not read from device. Error:")
    );
 
    txvr.mac_pause().unwrap();
    txvr.transact(b"sys set pindig GPIO10 0").unwrap();
    loop {
        txvr.transact(b"sys set pindig GPIO10 1").unwrap();
        let now = SystemTime::now();
        let since_the_epoch = now 
            .duration_since(UNIX_EPOCH)
            .expect("Time went backwards")
            .as_millis();
        println!("sending: {}", since_the_epoch);
        txvr.radio_tx(format!("{}", since_the_epoch));
        txvr.transact(b"sys set pindig GPIO10 0").unwrap();
        thread::sleep(Duration::from_millis(100));
    }
}