use std::{io::Error, thread::sleep, time::Duration};

use rust_mc_proto::{DataBufferReader, DataBufferWriter, MinecraftConnection, Packet, ProtocolError};
use socks::Socks5Stream;
use crate::utils;

pub struct Socks5Bot {
    username: String,
    proxy_addr: String,
    server_addr: String,
    conn: MinecraftConnection<Socks5Stream>,
    should_restart: bool,
}

impl Socks5Bot {
    pub fn new(username: String, proxy_addr: String, server_addr: String) -> Result<Socks5Bot, Error> {
        println!("[{}] Creating bot with proxy {}", username, proxy_addr);
        let stream = Socks5Stream::connect(proxy_addr.as_str(), server_addr.as_str());
        let should_restart = false;
        match stream {
            Ok(stream) => Ok(Socks5Bot { username, proxy_addr, server_addr, conn: MinecraftConnection::new(stream), should_restart }),
            Err(e) => Err(e),
        }
    }
    // bot登录函数
    pub fn login(&mut self) -> Result<(), ProtocolError> {
        let mut server_host: String = self.server_addr.clone();
        let server_port: String = server_host.split_off(server_host.find(":").unwrap()+1);
        // println!("{}",server_host);
        server_host = server_host.strip_suffix(':').unwrap().to_string();
        let server_port_num: u16 = server_port.parse::<u16>().unwrap();
        self.conn.write_packet(&Packet::build(0x00, |packet| {
            packet.write_u16_varint(763)?; // protocol_version
            packet.write_string(&server_host)?; // server_address
            packet.write_unsigned_short(server_port_num)?; // server_port
            packet.write_u8_varint(2) // next_state
        })?)?; // handshake packet

        self.conn.write_packet(&Packet::build(0x00, |packet| {
            packet.write_string(&self.username)?;
            packet.write_boolean(false)// ?;
            // packet.write_uuid(&Uuid::parse_str("550e8400-e29b-41d4-a716-446655440000").unwrap())
        })?)?; // login start packet

        Ok(())
    }

    pub fn handle_keepalive(&mut self,packet: &mut Packet) -> Result<(), ProtocolError> {
        // keep alive
        let id = packet.read_long()?;
        self.conn.write_packet(&Packet::build(0x12, |packet| { // respond with a same keep alive packet
            packet.write_long(id)
        })?)?;
        // println!("Server keep alived");
        self.conn.write_packet(&Packet::build(0x07, |packet| {
            packet.write_u8_varint(0)
        })?)?;
        Ok(())
    }

    pub fn handle_disconnect(&mut self,packet: &mut Packet) -> Result<(), ProtocolError> {
        // disconnect
        let message = packet.read_string()?;
        let text = utils::parse_json_component(message.as_str());
        println!("[{}] Server disconnected: {}", self.username, text);
        if text.contains("验证程序已启用") {
            println!("[{}] Restart flag setted, will restart after 1.5 min", self.username);
            sleep(Duration::from_secs(90));
            self.should_restart = true;
        }
        Ok(())
    }

    // 处理网络数据包
    pub fn handle_packets(&mut self) -> Result<(), ProtocolError> {
        let mut status = 0;

        while self.conn.is_alive() {
            let mut packet = self.conn.read_packet()?;
            match packet.id() {
                0x02 => {
                    // login success
                    println!("[{}] Successfully logged in!",self.username);
                    status = 1;
                }
                0x03 => {
                    // set compression
                    let threshold = packet.read_i32_varint()?;
                    if threshold >= 0 {
                        self.conn.set_compression(Some(threshold as usize));
                        // println!("[{}] Compression threshold set to {}", self.username, threshold)
                    }
                }
                0x23 => {
                    self.handle_keepalive(&mut packet)?;
                }
                0x1A => {
                    // disconnect
                    self.handle_disconnect(&mut packet)?;
                    break;
                }
                0x00 => {
                    if status == 0{
                        let text = packet.read_string()?;
                        println!("[{}] Failed to login: {}", self.username, utils::parse_json_component(text.as_str()));
                        break;
                    }
                }
                0x38 => {
                    // player died
                    println!("[{}] Player died,respawning...",self.username);
                    self.conn.write_packet(&Packet::build(0x07, |packet| {
                        packet.write_u8_varint(0)
                    })?)?
                }
                _ => {

                }
            }
        }
        Ok(())
    }

    pub fn run(&mut self) -> Result<(), ProtocolError> {
        println!("[{}] Connecting to {} with proxy {}", self.username, self.server_addr,self.proxy_addr);
        self.login().unwrap();
        self.handle_packets().unwrap_or(());
        Ok(())
    }

    pub fn should_restart(&self) -> bool {
        self.should_restart
    }
}