package main

import (
	"errors"
	"log"
	"net/http"
	"os"
)

func CreateNewEntry(email, password string) error {
	server := os.Getenv("FREEMAIL_SMTP_MAILER_MX")

	if !ValidateEmail(email) {
		return errors.New("This doesn't look like a mail adress.")
	}

	vU := VirtualUser{Email: email, Password: password}

	if vU.EmailExists() {
		return errors.New("Mail adress already exists.")
	}

	vD := VirtualDomain{}
	vD.Name = GetDomain(vU.Email)

	// Checks for correct DNS
	if !vD.ValidateDomainMX(server) {
		return errors.New("Wrong DNS setup. The MX record does not point to this server. Please fix your DNS.")

		// We require the correct MX entry, not just a A record.
		//
		//if !vD.ValidateDomain(server) {
		//	return errors.New("Neither the MX record nor the domain itself point to this server. Please fix your DNS.")
		//}
	}

	if !vD.DomainExists() {
		if !vD.CreateDomain() {
			return errors.New("There was an error.")
		}
	}

	vU.DomainId = vD.GetPrimaryKey()
	if vU.DomainId == 0 {
		return errors.New("There was an error.")
	}

	if !vU.CreateEmail() {
		return errors.New("There was an error.")
	}
	return nil
}

func ExecTemplate(template string, w http.ResponseWriter, r *http.Request, flash Flash) error {
	l := GetLanguage(r)
	flash.Language = l

	if flash.Language == "" {
		flash.Language = "en"
	}
	if l != "" {
		l = "_" + l
	}

	template = template + l + ".html"
	index := mainTempl.Lookup(template)

	err := index.ExecuteTemplate(w, template, flash)
	if err != nil {
		log.Println("Info: ", err)
		return err
	}
	return nil
}

func ChangePassword(email, oldPassword, newPassword string) error {
	if !ValidateEmail(email) {
		log.Println("Info: No E-Mail: ", email)
		return errors.New("This doesn't look like a mail adress.")
	}

	vU := VirtualUser{Email: email, Password: oldPassword}

	if !vU.AuthUser() {
		return errors.New("User/Password do not match.")
	}

	vD := VirtualDomain{}
	vD.Name = GetDomain(email)
	vU.DomainId = vD.GetPrimaryKey()

	if !vU.UpdatePassword(newPassword) {
		return errors.New("There was an error.")
	}

	return nil
}