package main

import (
	"fmt"
	"net/http"
	"strings"
)

func greet(w http.ResponseWriter, r *http.Request) {
	// Check if the Host header ends with "mzsl.nl"
	if !strings.HasSuffix(r.Host, "mzsl.nl") {
		w.WriteHeader(http.StatusNotFound)
		w.Write([]byte("404, url not found"))
		fmt.Printf("Host: %s not found\n", r.Host)
		return
	}

	// Replace "localhost" with "mziesel.nl" in the Host header
	newHost := strings.Replace(r.Host, "localhost", "mziesel.nl", 1)

	// Construct the new URL for redirection
	newUrl := "https://" + newHost + r.URL.String()
	fmt.Println(newUrl)

	// Set the Location header and respond with a 301 Moved Permanently status
	w.Header().Set("Location", newUrl)
	w.WriteHeader(http.StatusMovedPermanently)
	w.Write([]byte("url found, redirecting..."))
}

func main() {
	http.HandleFunc("/", greet)
	http.ListenAndServe(":8080", nil)
}