package main

import (
	"bufio"
	"fmt"
	"log"
	"net"
	"os"
)

func server() {
	fmt.Println()
	ln, err := net.Listen("tcp", ":8080")
	catchErr(err)
	fmt.Println("Listening...")
	for {
		conn, err := ln.Accept()
		catchErr(err)
		go handleConn(conn)
	}
}

func handleConn(conn net.Conn) {
	defer conn.Close()
	message, err := bufio.NewReader(conn).ReadString('\n')
	catchErr(err)
	conn_IP := getIP(conn)
	final_message := fmt.Sprintf("Received connection from %v with message: %v", conn_IP, message)
	reply_message := fmt.Sprintf("Your message was sent successfully\n")
	conn.Write([]byte(reply_message))
	fmt.Println(final_message)

}

func getIP(conn net.Conn) (IP string) {
	if addr, ok := conn.RemoteAddr().(*net.TCPAddr); ok {
		IP = fmt.Sprintf("%v", addr)
	}
	return IP
}

func catchErr(err error) (errHappened bool) {
	errHappened = false
	if err != nil {
		errHappened = true
		log.Fatalf("Error: %v\n", err)
		os.Exit(2)
	}
	return errHappened
}