var tools = require('./tools/general');

const Email = require('email-templates');

var i18n = require("i18n");


const previewEmail = require('preview-email');
var nodemailer = require("nodemailer");

const transport_preview = nodemailer.createTransport({
  jsonTransport: true
});

// create reusable transport method (opens pool of SMTP connections)
var smtpTransport = nodemailer.createTransport({
  service: 'Gmail',
  auth: {
    user: process.env.EMAIL_FROM,
    pass: process.env.EMAIL_PW
  }
});

function checkifSendEmail() {
  //return process.env.SEND_EMAIL === "1";
  return false;
}

module.exports = {
  sendEmail_base: function (template, username, to, mylocalsconf) {

    console.log("check EMAIL :" + checkifSendEmail());

    const email = new Email({
      message: {
        from: process.env.EMAIL_FROM, // sender address
      },
      send: checkifSendEmail(),
      preview: !checkifSendEmail(),
      transport: {
        service: 'Gmail',
        auth: {
          user: process.env.EMAIL_FROM,
          pass: process.env.EMAIL_PW
        }
      },
    });

    email
      .send({
        template: template,
        message: {
          to: to,
        },
        locals: mylocalsconf,
      })
      .then(console.log)
      .catch(console.error);
  },
  sendEmail_Normale: function (username, to, subject, html) {

    // setup e-mail data with unicode symbols
    var mailOptions = {
      from: process.env.EMAIL_FROM, // sender address
      to: to,
      generateTextFromHTML: true,
      subject: subject,
      html: html,
    };

    if (process.env.SEND_EMAIL === 1) {
      console.log("SEND EMAIL smtpTransport");
// send mail with defined transport object
      smtpTransport.sendMail(mailOptions, function (error, response) {
        if (error) {
          console.log(error);
        } else {
          console.log("Message sent: " + response);
        }
      });
    } else {
      if (process.env.PROVA_EMAIL_TEMPLATE !== "1")
        previewEmail(mailOptions).then(console.log).catch(console.error);
      else
        transport_preview.sendMail(mailOptions).then(console.log).catch(console.error);
    }
  },
  getHostByIdApp: function (idapp) {
    if (idapp === 1) {
      return process.env.URLBASE_APP1 + ':' + process.env.PORT_APP1;
    }else{
      return ""
    }
  },
  getNomeAppByIdApp: function (idapp) {
    if (idapp === 1) {
      return process.env.NOME_APP1;
    }
  },
  getlinkReg: function (idapp, idreg) {
    strlinkreg = this.getHostByIdApp(idapp) + "/#" + process.env.LINKVERIF_REG + `?idapp=${idapp}&idlink=${idreg}`;
    return strlinkreg;
  },
  getlinkRequestNewPassword: function (idapp, user, tokenforgot) {
    strlinkreg = this.getHostByIdApp(idapp) + "/#" + process.env.LINK_REQUEST_NEWPASSWORD + `?idapp=${idapp}&username=${user}&=tokenforgot=${tokenforgot}`;
    return strlinkreg;
  },
  sendEmail_Registration: function (lang, emailto, user, idapp, idreg) {

    mylocalsconf = {
      locale: lang,
      nomeapp: this.getNomeAppByIdApp(idapp),
      strlinkreg: this.getlinkReg(idapp, idreg),
      user: user,
      forgetpwd: "",
      emailto: emailto,
    };

    this.sendEmail_base('registration/' + lang, user, emailto, mylocalsconf);
  },
  sendEmail_RequestNewPassword: function (lang, emailto, idapp, tokenforgot) {

    mylocalsconf = {
      locale: lang,
      nomeapp: this.getNomeAppByIdApp(idapp),
      user: user,
      strlinksetpassword: this.getlinkRequestNewPassword(idapp, user, tokenforgot),
      emailto: emailto,
    };

    this.sendEmail_base('resetpwd/' + lang, user, emailto, mylocalsconf);
  },

};