/* eslint-disable @typescript-eslint/camelcase */
import Mail from 'nodemailer/lib/mailer';
import { Match } from 'meteor/check';
import { TAPi18n } from 'meteor/rocketchat:tap-i18n';

import { callbacks } from '../../../lib/callbacks';
import { IEmailInbox } from '../../../definition/IEmailInbox';
import { IUser } from '../../../definition/IUser';
import { FileUpload } from '../../../app/file-upload/server';
import { slashCommands } from '../../../app/utils/server';
import { Messages, Rooms, Users } from '../../../app/models/server';
import { Uploads } from '../../../app/models/server/raw';
import { Inbox, inboxes } from './EmailInbox';
import { sendMessage } from '../../../app/lib/server/functions/sendMessage';
import { settings } from '../../../app/settings/server';
import { IMessage } from '../../../definition/IMessage';

const livechatQuoteRegExp = /^\[\s\]\(https?:\/\/.+\/live\/.+\?msg=(?<id>.+?)\)\s(?<text>.+)/s;

const user: IUser = Users.findOneById('rocket.cat');

const language = settings.get<string>('Language') || 'en';
const t = (s: string): string => TAPi18n.__(s, { lng: language });

const sendErrorReplyMessage = (error: string, options: any): void => {
	if (!options?.rid || !options?.msgId) {
		return;
	}

	const message = {
		groupable: false,
		msg: `@${options.sender} something went wrong when replying email, sorry. **Error:**: ${error}`,
		_id: String(Date.now()),
		rid: options.rid,
		ts: new Date(),
	};

	sendMessage(user, message, { _id: options.rid });
};

function sendEmail(inbox: Inbox, mail: Mail.Options, options?: any): void {
	inbox.smtp
		.sendMail({
			from: inbox.config.senderInfo
				? {
						name: inbox.config.senderInfo,
						address: inbox.config.email,
				  }
				: inbox.config.email,
			...mail,
		})
		.then((info) => {
			console.log('Message sent: %s', info.messageId);
		})
		.catch((error) => {
			console.log('Error sending Email reply: %s', error.message);

			if (!options?.msgId) {
				return;
			}

			sendErrorReplyMessage(error.message, options);
		});
}

slashCommands.add(
	'sendEmailAttachment',
	(command: any, params: string) => {
		if (command !== 'sendEmailAttachment' || !Match.test(params, String)) {
			return;
		}

		const message = Messages.findOneById(params.trim());

		if (!message || !message.file) {
			return;
		}

		const room = Rooms.findOneById(message.rid);

		const inbox = inboxes.get(room.email.inbox);

		if (!inbox) {
			return sendErrorReplyMessage(`Email inbox ${room.email.inbox} not found or disabled.`, {
				msgId: message._id,
				sender: message.u.username,
				rid: room._id,
			});
		}

		const file = Promise.await(Uploads.findOneById(message.file._id));

		if (!file) {
			return;
		}

		FileUpload.getBuffer(file, (_err?: Error, buffer?: Buffer) => {
			!_err &&
				buffer &&
				sendEmail(
					inbox,
					{
						to: room.email.replyTo,
						subject: room.email.subject,
						text: message.attachments[0].description || '',
						attachments: [
							{
								content: buffer,
								contentType: file.type,
								filename: file.name,
							},
						],
						inReplyTo: room.email.thread,
						references: [room.email.thread],
					},
					{
						msgId: message._id,
						sender: message.u.username,
						rid: message.rid,
					},
				);
		});

		Messages.update(
			{ _id: message._id },
			{
				$set: {
					blocks: [
						{
							type: 'context',
							elements: [
								{
									type: 'mrkdwn',
									text: `**${t('To')}:** ${room.email.replyTo}\n**${t('Subject')}:** ${room.email.subject}`,
								},
							],
						},
					],
				},
				$pull: {
					attachments: { 'actions.0.type': 'button' },
				},
			},
		);
	},
	{
		description: 'Send attachment as email',
		params: 'msg_id',
	},
	undefined,
	false,
	undefined,
	undefined,
);

callbacks.add(
	'beforeSaveMessage',
	function (message: IMessage, room: any) {
		if (!room?.email?.inbox) {
			return message;
		}

		if (message.file) {
			message.attachments = message.attachments || [];
			message.attachments.push({
				actions: [
					{
						type: 'button',
						text: t('Send_via_Email_as_attachment'),
						msg: `/sendEmailAttachment ${message._id}`,
						msg_in_chat_window: true,
						msg_processing_type: 'sendMessage',
					},
				],
			});

			return message;
		}

		const { msg } = message;

		// Try to identify a quote in a livechat room
		const match = msg.match(livechatQuoteRegExp);
		if (!match?.groups) {
			return message;
		}

		const inbox = inboxes.get(room.email.inbox);

		if (!inbox) {
			sendErrorReplyMessage(`Email inbox ${room.email.inbox} not found or disabled.`, {
				msgId: message._id,
				sender: message.u.username,
				rid: room._id,
			});

			return message;
		}

		if (!inbox) {
			return message;
		}

		const replyToMessage = Messages.findOneById(match.groups.id);

		if (!replyToMessage?.email?.messageId) {
			return message;
		}

		sendEmail(
			inbox,
			{
				text: match.groups.text,
				inReplyTo: replyToMessage.email.messageId,
				references: [...(replyToMessage.email.references ?? []), replyToMessage.email.messageId],
				to: room.email.replyTo,
				subject: room.email.subject,
			},
			{
				msgId: message._id,
				sender: message.u.username,
				rid: room._id,
			},
		);

		message.msg = match.groups.text;

		message.groupable = false;

		message.blocks = [
			{
				type: 'context',
				elements: [
					{
						type: 'mrkdwn',
						text: `**${t('To')}:** ${room.email.replyTo}\n**${t('Subject')}:** ${room.email.subject}`,
					},
				],
			},
			{
				type: 'section',
				text: {
					type: 'mrkdwn',
					text: message.msg,
				},
			},
			{
				type: 'section',
				text: {
					type: 'mrkdwn',
					text: `> ---\n${replyToMessage.msg.replace(/^/gm, '> ')}`,
				},
			},
		];

		delete message.urls;

		return message;
	},
	callbacks.priority.LOW,
	'ReplyEmail',
);

export async function sendTestEmailToInbox(emailInboxRecord: IEmailInbox, user: IUser): Promise<void> {
	const inbox = inboxes.get(emailInboxRecord.email);

	if (!inbox) {
		throw new Error('inbox-not-found');
	}

	const address = user.emails?.find((email) => email.verified)?.address;

	if (!address) {
		throw new Error('user-without-verified-email');
	}

	console.log(`Sending testing email to ${address}`);
	sendEmail(inbox, {
		to: address,
		subject: 'Test of inbox configuration',
		text: 'Test of inbox configuration successful',
	});
}