use std::env;
use std::process::exit;

use hex::decode;
use reba_client::client::RelayClient;
use secp256k1::SecretKey;
use web3::signing::{Key,
                    SecretKeyRef};
// gets the specified environment variable
// returns an empty string if it does not exist
fn get_env(key: &str) -> String
{
    match env::var(key)
    {
        Ok(val) => val,
        Err(_e) => String::new()
    }
}

fn main()
{
    let pk_str = get_env("PK");
    let private_key_bytes: &[u8] = pk_str.as_bytes();

    let sk = SecretKey::from_slice(&decode(private_key_bytes).unwrap()).unwrap();

    let pk = SecretKeyRef::new(&sk);

    let address = pk.address();

    let mut client = RelayClient::new(address, &pk).unwrap();

    loop
    {
        let transaction = client.read_tx();
        match transaction
        {
            Some(tx) =>
            {
                println!("Chain ID: {}", tx.chain_id());
                println!("Nonce: {}", tx.nonce());
                println!("Value: {}", tx.value());
                println!("To: {}", tx.tx_to());
                println!("From: {}", tx.tx_from());
                println!("Input: {:?}", tx.input());
                println!("Gas Limit: {}", tx.gas_limit());
                println!("Gas Price: {:?}", tx.gas());
                println!("TX Type: {:?}", tx.tx_type());
            }
            None =>
            {
                println!("Could not connect to Relay. Are you registered?");
                exit(1);
            }
        }
    }
}