package main

import (
	"fmt"
	"io"
	"net/http"
	"os"
	"time"
)

func main() {

	DEV_TESTING := os.Getenv("DYNDNS_URL")

	DYNDNS_URL := os.Getenv("DYNDNS_URL")
	DYNDNS_ADDRESS := os.Getenv("DYNDNS_ADDRESS")
	DYNDNS_IPv4 := os.Getenv("DYNDNS_IPv4")
	DYNDNS_IPv6 := os.Getenv("DYNDNS_IPv6")
	DYNDNS_USERNAME := os.Getenv("DYNDNS_USERNAME")
	DYNDNS_PASSWORD := os.Getenv("DYNDNS_PASSWORD")

	DYNDNS_IPv4_ADDR_RESOLVER := os.Getenv("DYNDNS_IPv4_ADDR_RESOLVER")
	DYNDNS_IPv6_ADDR_RESOLVER := os.Getenv("DYNDNS_IPv6_ADDR_RESOLVER")

	if DYNDNS_IPv4_ADDR_RESOLVER == "" {
		DYNDNS_IPv4_ADDR_RESOLVER = "https://dns.hilden.info/ip"
	}

	if DYNDNS_IPv6_ADDR_RESOLVER == "" {
		DYNDNS_IPv6_ADDR_RESOLVER = "https://dns.hilden.info/ip"
	}

	if DEV_TESTING == "" {
		DYNDNS_URL = "https://dns.hilden.info"
		DYNDNS_ADDRESS = "devtest.dns.hilden.info"
		DYNDNS_IPv4 = "9.8.7.6"
		DYNDNS_IPv6 = "2001:db8::1"
		DYNDNS_USERNAME = "admin"
		DYNDNS_PASSWORD = "password"
		DYNDNS_IPv4_ADDR_RESOLVER = "https://dns.hilden.info/ip"
		DYNDNS_IPv6_ADDR_RESOLVER = "https://dns.hilden.info/ip"
	}

	for {
		/*GetIPv4*/
		respipv4, err := http.Get(DYNDNS_IPv4_ADDR_RESOLVER)
		if err != nil {
			fmt.Println("Fehler beim Abrufen der URL:", DYNDNS_IPv4_ADDR_RESOLVER, err)
		} else {
			body, err := io.ReadAll(respipv4.Body)
			if err != nil {
				fmt.Println("Fehler beim Lesen des Antwort-Bodys:", err)
			} else {
				// Antwort-Inhalt ausgeben
				DYNDNS_IPv4 = string(body)
				fmt.Println("Statuscode:", respipv4.StatusCode)
				fmt.Println("Antwort-Inhalt:", string(body))
			}
			respipv4.Body.Close()
		}

		/*GetIPv6*/
		respipv6, err := http.Get(DYNDNS_IPv6_ADDR_RESOLVER)
		if err != nil {
			fmt.Println("Fehler beim Abrufen der URL:", DYNDNS_IPv6_ADDR_RESOLVER, err)
		} else {
			body, err := io.ReadAll(respipv6.Body)
			if err != nil {
				fmt.Println("Fehler beim Lesen des Antwort-Bodys:", err)
			} else {
				// Antwort-Inhalt ausgeben
				DYNDNS_IPv6 = string(body)
				fmt.Println("Statuscode:", respipv6.StatusCode)
				fmt.Println("Antwort-Inhalt:", string(body))
			}
			respipv6.Body.Close()
		}

		/**/
		url := DYNDNS_URL + "/?DDNS=" + DYNDNS_ADDRESS + "&IP=" + DYNDNS_IPv4 + "&IPv6=" + DYNDNS_IPv6 + "&USER=" + DYNDNS_USERNAME + "&TOKEN=" + DYNDNS_PASSWORD
		resp, err := http.Get(url)
		if err != nil {
			fmt.Println("Fehler beim Abrufen der URL:", DYNDNS_IPv6_ADDR_RESOLVER, err)
		} else {
			body, err := io.ReadAll(resp.Body)
			if err != nil {
				fmt.Println("Fehler beim Lesen des Antwort-Bodys:", err)
			} else {
				// Antwort-Inhalt ausgeben
				fmt.Println("Statuscode:", resp.StatusCode)
				fmt.Println("Antwort-Inhalt:", string(body))
			}
			resp.Body.Close()
		}
		time.Sleep(5 * time.Minute)
	}
}