use problem_06::{DEFAULT_IP, DEFAULT_PORT};
use tokio::io::{AsyncReadExt, AsyncWriteExt};
use tokio::net::TcpStream;
use tracing::{debug, error, info};

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    tracing_subscriber::fmt::init();

    let mut stream = TcpStream::connect(format!("{DEFAULT_IP}:{DEFAULT_PORT}")).await?;
    let (mut read, mut write) = stream.split();

    let mut buf: [u8; 4] = [0; 4];

    // 20                          Plate {
    // 07 52 45 30 35 42 4b 47         plate: "RE05BKG",
    // 00 01 e2 40                     timestamp: 123456
    //                             }
    let message = [
        0x20, 0x07, 0x52, 0x45, 0x30, 0x35, 0x42, 0x4b, 0x47, 0x00, 0x01, 0xe2, 0x40,
    ];

    write.write_all(&message).await?;

    if let Ok(n) = read.read_exact(&mut buf).await {
        info!("Stream incoming...");

        if n == 0 {
            info!("End of stream");
            return Ok(());
        }

        let message = i32::from_be_bytes(buf);
        debug!(?message);
        return Ok(());
    }

    error!("Cannot read from socket");
    Err("Could not read from socket".into())
}