use std::collections::VecDeque;
use crate::varint::varint_read;

pub struct Handshake {
    pub protocol_version: i32,
    pub server_address: String,
    pub server_port: u16,
    pub intent: i32
}

impl Handshake {
    pub fn parse(mut packet: &mut VecDeque<u8>) -> Result<Self, String> {
        let protocol_version = varint_read(&mut packet)?;

        let str_len = varint_read(&mut packet)? as usize;
        let server_address : String = String::from_utf8(packet.drain(..str_len).collect::<Vec<u8>>()).expect("Invalid UTF-8");

        let bytes: [u8; 2] = [packet[0], packet[1]];
        let server_port : u16 = u16::from_be_bytes(bytes);
        packet.drain(..2);

        let intent : i32 = varint_read(&mut packet)?;
        Ok(Self {
            protocol_version,
            server_address,
            server_port,
            intent
        })
    }
}