import RecipientRemovedFromDocumentTemplate from '@documenso/email/templates/recipient-removed-from-document';
import { DOCUMENT_AUDIT_LOG_TYPE } from '@documenso/lib/types/document-audit-logs';
import type { ApiRequestMetadata } from '@documenso/lib/universal/extract-request-metadata';
import { prisma } from '@documenso/prisma';
import { msg } from '@lingui/core/macro';
import { EnvelopeType, RecipientRole, SendStatus } from '@prisma/client';
import { createElement } from 'react';

import { getI18nInstance } from '../../client-only/providers/i18n-server';
import { NEXT_PUBLIC_WEBAPP_URL } from '../../constants/app';
import { AppError, AppErrorCode } from '../../errors/app-error';
import { extractDerivedDocumentEmailSettings } from '../../types/document-email';
import { createDocumentAuditLogData } from '../../utils/document-audit-logs';
import { logger } from '../../utils/logger';
import { canRecipientBeModified, isRecipientEmailValidForSending } from '../../utils/recipients';
import { renderEmailWithI18N } from '../../utils/render-email-with-i18n';
import { buildTeamWhereQuery } from '../../utils/teams';
import { getEmailContext } from '../email/get-email-context';
import { assertEnvelopeMutable } from '../envelope/assert-envelope-mutable';
import { getEnvelopeWhereInput } from '../envelope/get-envelope-by-id';
import { assertOrganisationRatesAndLimits } from '../rate-limit/assert-organisation-rates-and-limits';

export interface DeleteEnvelopeRecipientOptions {
  userId: number;
  teamId: number;
  recipientId: number;
  requestMetadata: ApiRequestMetadata;
}

export const deleteEnvelopeRecipient = async ({
  userId,
  teamId,
  recipientId,
  requestMetadata,
}: DeleteEnvelopeRecipientOptions) => {
  const envelope = await prisma.envelope.findFirst({
    where: {
      recipients: {
        some: {
          id: recipientId,
        },
      },
      team: buildTeamWhereQuery({ teamId, userId }),
    },
    include: {
      documentMeta: true,
      team: true,
      recipients: {
        where: {
          id: recipientId,
        },
        include: {
          fields: true,
        },
      },
    },
  });

  const user = await prisma.user.findFirst({
    where: {
      id: userId,
    },
    select: {
      id: true,
      name: true,
      email: true,
    },
  });

  if (!envelope) {
    throw new AppError(AppErrorCode.NOT_FOUND, {
      message: 'Document not found',
    });
  }

  assertEnvelopeMutable(envelope);

  if (envelope.completedAt) {
    throw new AppError(AppErrorCode.INVALID_REQUEST, {
      message: 'Document already complete',
    });
  }

  if (!user) {
    throw new AppError(AppErrorCode.NOT_FOUND, {
      message: 'User not found',
    });
  }

  const recipientToDelete = envelope.recipients[0];

  if (!recipientToDelete || recipientToDelete.id !== recipientId) {
    throw new AppError(AppErrorCode.NOT_FOUND, {
      message: 'Recipient not found',
    });
  }

  if (!canRecipientBeModified(recipientToDelete, recipientToDelete.fields)) {
    throw new AppError(AppErrorCode.INVALID_REQUEST, {
      message: 'Recipient has already interacted with the document.',
    });
  }

  const { envelopeWhereInput } = await getEnvelopeWhereInput({
    id: {
      type: 'envelopeId',
      id: envelope.id,
    },
    type: null,
    userId,
    teamId,
  });

  const deletedRecipient = await prisma.$transaction(async (tx) => {
    await assertEnvelopeMutable(envelope, tx);

    if (envelope.type === EnvelopeType.DOCUMENT) {
      await tx.documentAuditLog.create({
        data: createDocumentAuditLogData({
          type: DOCUMENT_AUDIT_LOG_TYPE.RECIPIENT_DELETED,
          envelopeId: envelope.id,
          metadata: requestMetadata,
          data: {
            recipientEmail: recipientToDelete.email,
            recipientName: recipientToDelete.name,
            recipientId: recipientToDelete.id,
            recipientRole: recipientToDelete.role,
          },
        }),
      });
    }

    return await tx.recipient.delete({
      where: {
        id: recipientId,
        envelope: envelopeWhereInput,
      },
    });
  });

  const isRecipientRemovedEmailEnabled = extractDerivedDocumentEmailSettings(envelope.documentMeta).recipientRemoved;

  // Send email to deleted recipient.
  if (
    recipientToDelete.sendStatus === SendStatus.SENT &&
    recipientToDelete.role !== RecipientRole.CC &&
    isRecipientRemovedEmailEnabled &&
    envelope.type === EnvelopeType.DOCUMENT &&
    isRecipientEmailValidForSending(recipientToDelete)
  ) {
    const assetBaseUrl = NEXT_PUBLIC_WEBAPP_URL() || 'http://localhost:3000';

    const template = createElement(RecipientRemovedFromDocumentTemplate, {
      documentName: envelope.title,
      inviterName: envelope.team?.name || user.name || undefined,
      assetBaseUrl,
    });

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

    // Don't send the removal email if the organisation has email sending disabled.
    if (emailsDisabled) {
      return deletedRecipient;
    }

    // Meter the removal email against the organisation email quota/stats.
    // Add/remove churn can be used to blast unsolicited removal emails
    // outside the email limits.
    try {
      await assertOrganisationRatesAndLimits({
        organisationId,
        organisationClaim: claims,
        type: 'email',
        count: 1,
      });
    } catch (_err) {
      logger.warn({
        msg: 'Recipient removed email dropped: org email limit exceeded',
        organisationId,
        recipientId: recipientToDelete.id,
        envelopeId: envelope.id,
      });

      return deletedRecipient;
    }

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

    const i18n = await getI18nInstance(emailLanguage);

    await emailTransport.sendMail({
      to: {
        address: recipientToDelete.email,
        name: recipientToDelete.name,
      },
      from: senderEmail,
      replyTo: replyToEmail,
      subject: i18n._(msg`You have been removed from a document`),
      html,
      text,
    });
  }

  return deletedRecipient;
};