package main

import (
	"log/slog"
	"net"
	"os"
)

func main() {
	// Initialize JSON logger
	logger := slog.New(slog.NewJSONHandler(os.Stdout, nil))
	slog.SetDefault(logger)

	addr := "192.168.1.153:8080"
	slog.Info("Starting TCP server", "address", addr)

	//Resolve address
	addr_, err := net.ResolveTCPAddr("tcp", addr)
	if err != nil {
		slog.Error("Error resolving address", "error", err)
		return
	}

	//Listen for incoming connections
	listener, err := net.ListenTCP("tcp", addr_)
	if err != nil {
		slog.Error("Error starting server", "error", err)
		return
	}
	defer listener.Close()

	for {
		//Accept incoming connection
		conn, err := listener.AcceptTCP()
		if err != nil {
			slog.Error("Error accepting connection", "error", err)
			continue
		}
		go handleConnection(conn)
	}
}

func handleConnection(conn *net.TCPConn) {
	defer conn.Close()
	slog.Info("New connection", "remote_addr", conn.RemoteAddr().String())

	buffer := make([]byte, 1024)
	for {
		//Read up to 1024 bytes
		n, err := conn.Read(buffer)
		if err != nil {
			slog.Error("Error reading from connection", "error", err)
			return
		}
		if n == 0 {
			return
		}
		slog.Info("Received message", "message", string(buffer[:n]), "bytes", n)

		//Echo message back
		// _, err = conn.Write(buffer[:n])
		_, err = conn.Write([]byte("1"))
		if err != nil {
			slog.Error("Error writing to connection", "error", err)
			return
		}
	}
}