import { createElement } from 'react';

import { msg } from '@lingui/core/macro';
import { EnvelopeType } from '@prisma/client';

import { mailer } from '@documenso/email/mailer';
import { DocumentPendingEmailTemplate } from '@documenso/email/templates/document-pending';
import { prisma } from '@documenso/prisma';

import { getI18nInstance } from '../../client-only/providers/i18n-server';
import { NEXT_PUBLIC_WEBAPP_URL } from '../../constants/app';
import { extractDerivedDocumentEmailSettings } from '../../types/document-email';
import type { EnvelopeIdOptions } from '../../utils/envelope';
import { unsafeBuildEnvelopeIdQuery } from '../../utils/envelope';
import { renderEmailWithI18N } from '../../utils/render-email-with-i18n';
import { getEmailContext } from '../email/get-email-context';

export interface SendPendingEmailOptions {
  id: EnvelopeIdOptions;
  recipientId: number;
}

export const sendPendingEmail = async ({ id, recipientId }: SendPendingEmailOptions) => {
  const envelope = await prisma.envelope.findFirst({
    where: {
      ...unsafeBuildEnvelopeIdQuery(id, EnvelopeType.DOCUMENT),
      recipients: {
        some: {
          id: recipientId,
        },
      },
    },
    include: {
      recipients: {
        where: {
          id: recipientId,
        },
      },
      documentMeta: true,
    },
  });

  if (!envelope) {
    throw new Error('Document not found');
  }

  if (envelope.recipients.length === 0) {
    throw new Error('Document has no recipients');
  }

  const { branding, emailLanguage, senderEmail, replyToEmail } = await getEmailContext({
    emailType: 'RECIPIENT',
    source: {
      type: 'team',
      teamId: envelope.teamId,
    },
    meta: envelope.documentMeta,
  });

  const isDocumentPendingEmailEnabled = extractDerivedDocumentEmailSettings(
    envelope.documentMeta,
  ).documentPending;

  if (!isDocumentPendingEmailEnabled) {
    return;
  }

  const [recipient] = envelope.recipients;

  const { email, name } = recipient;

  const assetBaseUrl = NEXT_PUBLIC_WEBAPP_URL() || 'http://localhost:3000';

  const template = createElement(DocumentPendingEmailTemplate, {
    documentName: envelope.title,
    assetBaseUrl,
  });

  const [html, text] = await Promise.all([
    renderEmailWithI18N(template, { lang: emailLanguage, branding }),
    renderEmailWithI18N(template, {
      lang: emailLanguage,
      branding,
      plainText: true,
    }),
  ]);

  const i18n = await getI18nInstance(emailLanguage);

  await mailer.sendMail({
    to: {
      address: email,
      name,
    },
    from: senderEmail,
    replyTo: replyToEmail,
    subject: i18n._(msg`Waiting for others to complete signing.`),
    html,
    text,
  });
};