const tools = require('./tools/general');
const telegrambot = require('./telegram/telegrambot');

require('./config/config');

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

const i18n = require("i18n");

const { ObjectID } = require('mongodb');
const { Settings } = require('./models/settings');
const { TemplEmail } = require('./models/templemail');
const { Discipline } = require('./models/discipline');

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

const { MyEvent } = require('./models/myevent');
const { MailingList } = require('./models/mailinglist');
const { Newstosent } = require('./models/newstosent');

const server_constants = require('./tools/server_constants');

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

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


module.exports = {
  sendEmail_base: function (template, to, mylocalsconf, replyTo, transport, previewonly) {

    // console.log('mylocalsconf', mylocalsconf);

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

    if (replyTo === '')
      replyTo = mylocalsconf.dataemail.email_reply;

    const paramemail = {
      message: {
        from: mylocalsconf.dataemail.from, // sender address
        headers: {
          'Reply-To': replyTo
        }
      },
    };

    if (previewonly === undefined) {
      paramemail.preview = !checkifSendEmail();
      paramemail.send = checkifSendEmail();
    } else {
      paramemail.preview = previewonly;
      paramemail.send = !previewonly;
    }

    // if (!transport) {
    //   transport = this.getTransport(mylocalsconf);
    // }

    // console.log('1 . transport', transport);

    if (transport) {
      paramemail.transport = transport;
    } else {
      // console.log('1b . transport gmail');
      paramemail.transport = {
        service: 'gmail',
        auth: {
          user: tools.getEmailByIdApp(mylocalsconf.idapp),
          pass: tools.getPwdByIdApp(mylocalsconf.idapp)
        }
      }
    }

    // console.log('2 . paramemail.transport', paramemail.transport);
    // console.log('user', tools.getEmailByIdApp(mylocalsconf.idapp));
    // console.log('pass', tools.getPwdByIdApp(mylocalsconf.idapp));

    // console.log('paramemail', paramemail);

    const email = new Email(paramemail);

    return email
      .send({
        template: template,
        message: {
          to: to,
        },
        locals: mylocalsconf,
      })
      .then((ris) => {
        // console.log('ris EMAIL', ris);
        return !!ris
      })
      .catch((err) => {
        console.error('sendEmail_base Error: ', err);
        return false
      });
  },

  sendEmail_Normale: function (to, subject, html, replyTo) {

    // setup e-mail data with unicode symbols
    var mailOptions = {
      from: tools.getEmailByIdApp(mylocalsconf.idapp), // sender address
      to: to,
      generateTextFromHTML: true,
      subject: subject,
      html: html,
    };

    if (replyTo)
      mailOptions['reply-to'] = replyTo;

    if (process.env.SEND_EMAIL === 1) {
      // console.log("SEND EMAIL...");
// send mail with defined transport object
      smtpTransport.sendMail(mailOptions, function (error, response) {
        if (error) {
          console.log("Email Inviata ERRORE RISPOSTA: " + error);
        } else {
          // console.log("Email Inviata RISPOSTA: " + 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) {
  //     let siteport = (process.env.PORT_APP1 !== "0") ? (':' + process.env.PORT_APP1) : "";
  //     return process.env.URLBASE_APP1 + siteport;
  //   } else {
  //     return ""
  //   }
  // },

  getlinkReg: function (idapp, idreg) {
    strlinkreg = tools.getHostByIdApp(idapp) + process.env.LINKVERIF_REG + `?idapp=${idapp}&idlink=${idreg}`;
    return strlinkreg;
  },
  getlinkRequestNewPassword: function (idapp, email, tokenforgot) {
    strlinkreg = tools.getHostByIdApp(idapp) +  process.env.LINK_UPDATE_PASSWORD + `?idapp=${idapp}&email=${email}&tokenforgot=${tokenforgot}`;
    return strlinkreg;
  },
  sendEmail_Registration: async function (lang, emailto, user, idapp, idreg) {

    // console.log('idapp', idapp, tools.getNomeAppByIdApp(idapp));

    mylocalsconf = {
      idapp,
      dataemail: await this.getdataemail(idapp),
      locale: lang,
      nomeapp: tools.getNomeAppByIdApp(idapp),
      strlinkreg: this.getlinkReg(idapp, idreg),
      username: user.username,
      name: user.name,
      surname: user.surname,
      forgetpwd: "",
      emailto: emailto,
      user,
    };

    this.sendEmail_base('registration/' + lang, emailto, mylocalsconf, tools.getreplyToEmailByIdApp(idapp));

    // Send to the Admin an Email
    this.sendEmail_base('admin/registration/' + tools.LANGADMIN, tools.getAdminEmailByIdApp(idapp), mylocalsconf, '');

    await telegrambot.notifyToTelegram(telegrambot.phase.REGISTRATION, mylocalsconf);

    if (tools.isManagAndAdminDifferent(idapp)) {
      this.sendEmail_base('admin/registration/' + tools.LANGADMIN, tools.getManagerEmailByIdApp(idapp), mylocalsconf, '');
    }
  },
  sendEmail_RequestNewPassword: async function (lang, user, emailto, idapp, tokenforgot) {

    mylocalsconf = {
      idapp,
      dataemail: await this.getdataemail(idapp),
      locale: lang,
      nomeapp: tools.getNomeAppByIdApp(idapp),
      user: user,
      name: user.name,
      username: user.username,
      surname: user.surname,
      strlinksetpassword: this.getlinkRequestNewPassword(idapp, emailto, tokenforgot),
      emailto: emailto,
    };

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

  sendEmail_Booking: async function (res, lang, emailto, user, idapp, recbooking) {

    tools.mylog('sendEmail_Booking');
    tools.mylog('tools.getNomeAppByIdApp(idapp)', tools.getNomeAppByIdApp(idapp), idapp);

    mylocalsconf = {
      idapp,
      dataemail: await this.getdataemail(idapp),
      locale: lang,
      nomeapp: tools.getNomeAppByIdApp(idapp),
      name: user.name,
      surname: user.surname,
      emailto: emailto,
      participants: '',
      msgbooking: tools.convertTexttoHtml(recbooking.msgbooking),
      eventtextplain: tools.removeSpecialCharForEmail(recbooking.infoevent),
      event: recbooking.infoevent,
    };

    return Settings.getValDbSettings(idapp, 'MSG_REPLY_AFTER_BOOKING').then((ris => {
      mylocalsconf.msgreply_after_booking = ris;

      if (recbooking.numpeople > 1)
        mylocalsconf.participants = recbooking.numpeople.toString() + ' ' + tools.getres__('partecipanti', res);

      let texthtml = '';
      if (recbooking.modified) {
        texthtml = 'modifybooking';
      } else {
        texthtml = 'makebooking';
      }

      this.sendEmail_base('booking/' + texthtml + '/' + lang, emailto, mylocalsconf, tools.getreplyToEmailByIdApp(idapp));

      // Send Email also to the Admin
      this.sendEmail_base('admin/' + texthtml + '/' + tools.LANGADMIN, tools.getAdminEmailByIdApp(idapp), mylocalsconf, '');

      if (tools.isManagAndAdminDifferent(idapp)) {
        this.sendEmail_base('admin/' + texthtml + '/' + tools.LANGADMIN, tools.getManagerEmailByIdApp(idapp), mylocalsconf, '');
      }

    }));

  },

  sendEmail_CancelBooking: async function (res, lang, emailto, user, idapp, recbooking) {

    tools.mylog('sendEmail_CancelBooking');

    mylocalsconf = {
      idapp,
      dataemail: await this.getdataemail(idapp),
      locale: lang,
      nomeapp: tools.getNomeAppByIdApp(idapp),
      name: user.name,
      surname: user.surname,
      emailto: emailto,
      event: recbooking.infoevent,
      participants: '',
      eventtextplain: tools.removeSpecialCharForEmail(recbooking.infoevent),
    };

    if (recbooking.numpeople > 1)
      mylocalsconf.participants = recbooking.numpeople.toString() + ' ' + tools.getres__('partecipanti', res);

    this.sendEmail_base('booking/cancelbooking/' + lang, emailto, mylocalsconf, tools.getreplyToEmailByIdApp(idapp));

    // Send Email also to the Admin
    this.sendEmail_base('admin/cancelbooking/' + tools.LANGADMIN, tools.getAdminEmailByIdApp(idapp), mylocalsconf, '');

    if (tools.isManagAndAdminDifferent(idapp)) {
      this.sendEmail_base('admin/cancelbooking/' + tools.LANGADMIN, tools.getManagerEmailByIdApp(idapp), mylocalsconf, '');
    }
  },

  sendEmail_Msg: async function (res, lang, emailto, user, idapp, recmsg) {

    tools.mylog('sendEmail_Msg');
    tools.mylog('tools.getNomeAppByIdApp(idapp)', tools.getNomeAppByIdApp(idapp), idapp);

    mylocalsconf = {
      idapp,
      dataemail: await this.getdataemail(idapp),
      locale: lang,
      nomeapp: tools.getNomeAppByIdApp(idapp),
      name: user.name,
      surname: user.surname,
      usernameorig: user.name + ' ' + user.surname,
      emailto: emailto,
      message: tools.convertTexttoHtml(recmsg.message),
      infoevent: recmsg.source.infoevent,
      strlinkreply: tools.getHostByIdApp(idapp) + '/messages/' + recmsg._id
    };

    let replyto = '';
    if (mylocalsconf.infoevent !== '')
      replyto = user.email;
    else
      replyto = tools.getreplyToEmailByIdApp(idapp);

    return this.sendEmail_base('msg/sendmsg/' + lang, emailto, mylocalsconf, replyto);

    // Send Email also to the Admin
    // this.sendEmail_base('admin/sendmsg/' + lang, tools.getAdminEmailByIdApp(idapp), mylocalsconf);
  },
  Add_to_MailingList_AndSendEmailNotify: async function (lang, user, idapp, sendnews) {

    // console.log('idapp', idapp, tools.getNomeAppByIdApp(idapp));

    mylocalsconf = {
      idapp,
      dataemail: await this.getdataemail(idapp),
      locale: lang,
      nomeapp: tools.getNomeAppByIdApp(idapp),
      name: user.name,
      surname: user.surname,
      emailto: user.email,
    };

    const hash = tools.getHash(mylocalsconf.emailto);

    // Check if exist to the Mailing List
    let myperson = await MailingList.findByHash(idapp, hash);
    if (!myperson || !myperson.statesub || !myperson.wrongerr) {
      if (!myperson) {
        myperson = new MailingList({
          name: mylocalsconf.name,
          surname: mylocalsconf.surname,
          email: mylocalsconf.emailto,
          hash
        });
        myperson._id = new ObjectID();
      } else {
        myperson.name = mylocalsconf.name;
        myperson.surname = mylocalsconf.surname;
        //myperson.email = mylocalsconf.emailto;
        //myperson.hash = hash;
      }

      myperson.idapp = idapp;
      myperson.statesub = true; // subscription
      myperson.wrongerr = false;

      // Add/save new record to the DB MailingList
      const res = await myperson.save();

      if (sendnews) {
        // Send to the Admin an Email
        this.sendEmail_base('admin/added_to_newsletter/' + tools.LANGADMIN, tools.getAdminEmailByIdApp(idapp), mylocalsconf, '');

        if (tools.isManagAndAdminDifferent(idapp)) {
          this.sendEmail_base('admin/added_to_newsletter/' + tools.LANGADMIN, tools.getManagerEmailByIdApp(idapp), mylocalsconf, '');
        }
      }

      return { code: server_constants.RIS_SUBSCRIBED_OK, msg: server_constants.RIS_SUBSCRIBED_MSG[lang] }
    } else {
      // Already Esist
      return {
        code: server_constants.RIS_SUBSCRIBED_ALREADYEXIST,
        msg: server_constants.RIS_SUBSCRIBED_MSG_ALREADYEXIST[lang]
      }
    }

  },

  Remove_from_MailingList: async function (lang, hashemail, idapp) {

    // console.log('idapp', idapp, tools.getNomeAppByIdApp(idapp));

    // Check if exist to the Mailing List
    if (await MailingList.isUnsubscribed(idapp, hashemail)) {
      return {
        myperson: null,
        code: server_constants.RIS_UNSUBSCRIBED_ALREADY_DONE,
        msg: server_constants.RIS_UNSUBSCRIBED_MSG_ALREADY_DONE[lang]
      }
    }

    const fields_to_update = {
      statesub: false
    };
    let myperson = await MailingList.findOneAndUpdate({
      idapp,
      hash: hashemail
    }, { $set: fields_to_update }, { new: false });
    if (myperson) {
      return { myperson, code: server_constants.RIS_UNSUBSCRIBED_OK, msg: '' }

    } else {
      // Not found !
      return {
        myperson: null,
        code: server_constants.RIS_UNSUBSCRIBED_NOT_EXIST,
        msg: server_constants.RIS_UNSUBSTR_NOT_EXIST[lang]
      }
    }

  },

  fieldsloop: function (mylocalsconf, myvar) {
    const baseurl = tools.getHostByIdApp(mylocalsconf.idapp);
    const urlunsibscribe = baseurl + '/unsubscribe?em=' + mylocalsconf.hashemail + '&mc=' + mylocalsconf.dataemail.mailchimpactive + '&email=' + mylocalsconf.emailto;

    out = myvar.replace('{urlunsubscribe}', urlunsibscribe);
    out = out.replace('{email}', mylocalsconf.emailto);
    out = out.replace('{name}', mylocalsconf.name);
    out = out.replace('{surname}', mylocalsconf.surname);

    return out
  },

  replacefields: function (mylocalsconf) {

    mylocalsconf.dataemail.disclaimer_out = this.fieldsloop(mylocalsconf, mylocalsconf.dataemail.disclaimer);
    mylocalsconf.dataemail.disc_bottom_out = this.fieldsloop(mylocalsconf, mylocalsconf.dataemail.disc_bottom);
    mylocalsconf.dataemail.templ.testoheadermail_out = this.fieldsloop(mylocalsconf, mylocalsconf.dataemail.templ.testoheadermail);

    return mylocalsconf
  },

  getdataemail: async (idapp) => {
    // console.log('getdataemail');
    const mydata = {
      content_after_events: await Settings.getValDbSettings(idapp, 'TEXT_AFTER_EV'),
      mailchimpactive: tools.BoolToInt(await Settings.getValDbSettings(idapp, 'MAILCHIMP_ON')),
      urltwitter: await Settings.getValDbSettings(idapp, 'URL_TWITTER'),
      urlfb: await Settings.getValDbSettings(idapp, 'URL_FACEBOOK'),
      urlyoutube: await Settings.getValDbSettings(idapp, 'URL_YOUTUBE'),
      urlinstagram: await Settings.getValDbSettings(idapp, 'URL_INSTAGRAM'),
      textpromo: await Settings.getValDbSettings(idapp, 'TEXT_PROMO'),
      disclaimer: await Settings.getValDbSettings(idapp, 'TEXT_DISCLAIMER'),
      disc_bottom: await Settings.getValDbSettings(idapp, 'TEXT_DISC_BOTTOM'),
      firma: await Settings.getValDbSettings(idapp, 'TEXT_SIGN'),

      arrdiscipline: await Discipline.getDisciplineforNewsletter(idapp),
      disc_title: await Settings.getValDbSettings(idapp, 'DISC_TITLE'),
      height_logo: await Settings.getValDbSettings(idapp, 'HEIGHT_LOGO'),
      from: await Settings.getValDbSettings(idapp, 'EMAIL_FROM'),
      email_reply: await Settings.getValDbSettings(idapp, 'EMAIL_REPLY', ''),
      pwd_from: await Settings.getValDbSettings(idapp, 'PWD_FROM'),
      email_service: await Settings.getValDbSettings(idapp, 'EMAIL_SERVICE_SEND'),
      email_port: await Settings.getValDbSettings(idapp, 'EMAIL_PORT'),
      templemail_id: await Settings.getValDbSettings(idapp, 'TEMPLEMAIL_ID'),
    };

    // console.log(mydata.templemail_id);
    mydata.templ = await TemplEmail.findOne({_id: mydata.templemail_id });
    // console.log(mydata.templ);

    return mydata
  },

  getTransport: (mylocalsconf) => {
    // Create Transport
    let smtpTransport = null;

    if (mylocalsconf.dataemail.email_service !== 'gmail' && mylocalsconf.dataemail.email_service !== undefined) {
      smtpTransport = nodemailer.createTransport({
        host: mylocalsconf.dataemail.email_service,
        port: mylocalsconf.dataemail.email_port,
        auth: {
          user: mylocalsconf.dataemail.from,
          pass: mylocalsconf.dataemail.pwd_from
        }
      });
    } else if (mylocalsconf.dataemail.email_service === 'gmail' && mylocalsconf.dataemail.email_service !== undefined) {
      smtpTransport = {
        service: 'gmail', //'Gmail',
        auth: {
          user: mylocalsconf.dataemail.from,
          pass: mylocalsconf.dataemail.pwd_from
        }
      };
    } else {
      smtpTransport = {
        service: 'gmail',
        auth: {
          user: tools.getEmailByIdApp(mylocalsconf.idapp),
          pass: tools.getPwdByIdApp(mylocalsconf.idapp)
        }
      };
    }

    return smtpTransport;
  },

  sendEmail_Newsletter_Events: async function (lang, idapp, id_newstosent) {

    console.log('INIZIO - sendEmail_Newsletter_Events', tools.getNomeAppByIdApp(idapp));

    //++Todo Extract List Email to send
    const userstosend = await MailingList.findAllIdAppSubscribed(idapp);

    const myarrevents = await MyEvent.getLastEvents(idapp);

    mylocalsconf = {
      idapp,
      locale: lang,
      nomeapp: tools.getNomeAppByIdApp(idapp),
      arrevents: myarrevents,
      baseurl: tools.getHostByIdApp(idapp),
      dataemail: await this.getdataemail(idapp)
    };

    await Newstosent.processingJob(id_newstosent, true);

    const mynewsrec = await Newstosent.findOne({ _id: id_newstosent });

    mynewsrec.numemail_tot = userstosend.length;
    mynewsrec.templemail_str = mylocalsconf.dataemail.templ.subject;
    mynewsrec.numemail_sent = await MailingList.getnumSent(idapp, id_newstosent);

    const smtpTransport = this.getTransport(mylocalsconf);

    // LOOP USERS EMAIL
    for (const user of userstosend) {

      const isok = await MailingList.isOk(idapp, user._id, id_newstosent);
      if (isok) {
        let secpause = await Settings.getValDbSettings(idapp, 'MSEC_PAUSE_SEND', process.env.DELAY_SENDEMAIL);
        if (secpause < process.env.DELAY_SENDEMAIL)
          secpause = process.env.DELAY_SENDEMAIL;

        activate = await Newstosent.isActivated(id_newstosent);

        if (!activate) {
          // Invio Newsletter Abortito!
          mynewsrec.error_job = 'Invio Newsletter abortito alle ore ' + new Date().toDateString() + new Date().toTimeString();
          await mynewsrec.save();
          await Newstosent.processingJob(id_newstosent, false);
          console.log('*** L\'Invio della Newsletter è stato fermato ! ');
          return false
        }

        mylocalsconf.name = user.name;
        mylocalsconf.surname = user.surname;
        mylocalsconf.emailto = user.email;
        mylocalsconf.hashemail = tools.getHash(user.email);

        mylocalsconf = this.replacefields(mylocalsconf);


        // If has already sent, don't send it again!
        if (user.lastid_newstosent !== id_newstosent.toString()) {
          console.log('@@@@@ COMPARE DIVERSI: lastid', user.lastid_newstosent, 'idsent', id_newstosent.toString());

          if (process.env.DEBUG)
            await tools.snooze(5000);

          // Send Email to the User
          // console.log('-> Invio Email (', mynewsrec.numemail_sent, '/', mynewsrec.numemail_tot, ')');
          const esito = this.sendEmail_base('newsletter/' + lang, mylocalsconf.emailto, mylocalsconf, mylocalsconf.dataemail.email_reply, smtpTransport);

          //Put the result in the database, to check if is sent or not.
          const updateml = await MailingList.findOneAndUpdate({
            idapp,
            email: user.email
          }, { $set: { lastid_newstosent: ObjectID(id_newstosent) } }, { new: false });


          //Delay for send email...
          await tools.snooze(secpause);

          mynewsrec.lastemailsent_Job = new Date();
          mynewsrec.numemail_sent = await MailingList.getnumSent(idapp, id_newstosent);

          const recsaved = await mynewsrec.save();
        } else {
          console.log('*** COMPARE: UGUALI !!!!! lastid', user.lastid_newstosent, 'idsent', id_newstosent.toString());
        }
      }
    }

    await Newstosent.endJob(id_newstosent);
    await Newstosent.processingJob(id_newstosent, false);
    console.log('****', tools.getNomeAppByIdApp(idapp), mynewsrec.numemail_sent, 'Email inviate');

    console.log('FINE (esco da funz) - sendEmail_Newsletter_Events', tools.getNomeAppByIdApp(idapp));

  },

  checkifSentNewsletter: async function (idapp) {
    // Check if is the time to send the Newsletter

    return Newstosent.findNewsletter_To_Send(idapp)
      .then((rec) => {
        if (rec)
          this.sendNewsletter(rec);
      });
  }
  ,

  checkifPendingNewsletter: async function (idapp) {
    // Check if is the time to send the Newsletter
    // Only newsletter pending en 8 hour last email sent.

    return Newstosent.findNewsletterPending_To_Send(idapp)
      .then((rec) => {  //
        this.sendNewsletter(rec)
      });
  },

  sendNewsletter: async function (rec) {
    if (rec) {
      // Start the job
      myjobnews = await Newstosent.findOne({ _id: rec._id });
      if (!!myjobnews) {
        myjobnews.starting_job = true;
        myjobnews.datestartJob = new Date();

        myjobnews.save()
          .then((ris) => {

            this.sendEmail_Newsletter_Events("it", '2', rec._id);
          })
          .catch((e) => {
            console.error(e);
          });
      }
    }
  },

  testemail: async function (idapp, lang, previewonly) {

    const myarrevents = await MyEvent.getLastEvents(idapp);
    const myemail = await Settings.getValDbSettings(idapp, 'EMAIL_TEST');
    mylocalsconf = {
      idapp,
      locale: lang,
      nomeapp: tools.getNomeAppByIdApp(idapp),
      arrevents: myarrevents,
      name: 'TestNome',
      surname: 'TestCognome',
      emailto: myemail,
      baseurl: tools.getHostByIdApp(idapp),
      hashemail: tools.getHash(myemail),
    };

    console.log('myarrevents');
    console.table(mylocalsconf.arrevents);

    mylocalsconf.dataemail = await this.getdataemail(idapp);

    this.replacefields(mylocalsconf);

    const smtpTransport = this.getTransport(mylocalsconf);

    console.log('-> Invio Email TEST a', mylocalsconf.emailto, 'previewonly', previewonly);
    return this.sendEmail_base('newsletter/' + lang, mylocalsconf.emailto, mylocalsconf, '', smtpTransport, previewonly);

  }


}
;