import { Meteor } from 'meteor/meteor';
import { Match, check } from 'meteor/check';
import { Messages, Users, Rooms, Subscriptions } from '@rocket.chat/models';
import { escapeRegExp } from '@rocket.chat/string-helpers';
import { Message } from '@rocket.chat/core-services';
import type { IMessage } from '@rocket.chat/core-typings';
import { isChatReportMessageProps } from '@rocket.chat/rest-typings';

import { roomAccessAttributes } from '../../../authorization/server';
import { hasPermissionAsync } from '../../../authorization/server/functions/hasPermission';
import { normalizeMessagesForUser } from '../../../utils/server/lib/normalizeMessagesForUser';
import { API } from '../api';
import { processWebhookMessage } from '../../../lib/server/functions/processWebhookMessage';
import { settings } from '../../../settings/server';
import { executeSetReaction } from '../../../reactions/server/setReaction';
import { findDiscussionsFromRoom, findMentionedMessages, findStarredMessages } from '../lib/messages';
import { executeSendMessage } from '../../../lib/server/methods/sendMessage';
import { getPaginationItems } from '../helpers/getPaginationItems';
import { canAccessRoomAsync, canAccessRoomIdAsync } from '../../../authorization/server/functions/canAccessRoom';
import { canSendMessageAsync } from '../../../authorization/server/functions/canSendMessage';
import { deleteMessageValidatingPermission } from '../../../lib/server/functions/deleteMessage';
import { reportMessage } from '../../../../server/lib/moderation/reportMessage';

API.v1.addRoute(
	'chat.delete',
	{ authRequired: true },
	{
		async post() {
			check(
				this.bodyParams,
				Match.ObjectIncluding({
					msgId: String,
					roomId: String,
					asUser: Match.Maybe(Boolean),
				}),
			);

			const msg = await Messages.findOneById(this.bodyParams.msgId, { projection: { u: 1, rid: 1 } });

			if (!msg) {
				return API.v1.failure(`No message found with the id of "${this.bodyParams.msgId}".`);
			}

			if (this.bodyParams.roomId !== msg.rid) {
				return API.v1.failure('The room id provided does not match where the message is from.');
			}

			if (
				this.bodyParams.asUser &&
				msg.u._id !== this.userId &&
				!(await hasPermissionAsync(this.userId, 'force-delete-message', msg.rid))
			) {
				return API.v1.failure('Unauthorized. You must have the permission "force-delete-message" to delete other\'s message as them.');
			}

			const userId = this.bodyParams.asUser ? msg.u._id : this.userId;
			const user = await Users.findOneById(userId, { projection: { _id: 1 } });

			if (!user) {
				return API.v1.failure('User not found');
			}

			await deleteMessageValidatingPermission(msg, user._id);

			return API.v1.success({
				_id: msg._id,
				ts: Date.now().toString(),
				message: msg,
			});
		},
	},
);

API.v1.addRoute(
	'chat.syncMessages',
	{ authRequired: true },
	{
		async get() {
			const { roomId, lastUpdate } = this.queryParams;

			if (!roomId) {
				throw new Meteor.Error('error-roomId-param-not-provided', 'The required "roomId" query param is missing.');
			}

			if (!lastUpdate) {
				throw new Meteor.Error('error-lastUpdate-param-not-provided', 'The required "lastUpdate" query param is missing.');
			} else if (isNaN(Date.parse(lastUpdate))) {
				throw new Meteor.Error('error-roomId-param-invalid', 'The "lastUpdate" query parameter must be a valid date.');
			}

			const result = await Meteor.callAsync('messages/get', roomId, { lastUpdate: new Date(lastUpdate) });

			if (!result) {
				return API.v1.failure();
			}

			return API.v1.success({
				result: {
					updated: await normalizeMessagesForUser(result.updated, this.userId),
					deleted: result.deleted,
				},
			});
		},
	},
);

API.v1.addRoute(
	'chat.getMessage',
	{
		authRequired: true,
	},
	{
		async get() {
			if (!this.queryParams.msgId) {
				return API.v1.failure('The "msgId" query parameter must be provided.');
			}

			const msg = await Meteor.callAsync('getSingleMessage', this.queryParams.msgId);

			if (!msg) {
				return API.v1.failure();
			}

			const [message] = await normalizeMessagesForUser([msg], this.userId);

			return API.v1.success({
				message,
			});
		},
	},
);

API.v1.addRoute(
	'chat.pinMessage',
	{ authRequired: true },
	{
		async post() {
			if (!this.bodyParams.messageId?.trim()) {
				throw new Meteor.Error('error-messageid-param-not-provided', 'The required "messageId" param is missing.');
			}

			const msg = await Messages.findOneById(this.bodyParams.messageId);

			if (!msg) {
				throw new Meteor.Error('error-message-not-found', 'The provided "messageId" does not match any existing message.');
			}

			const pinnedMessage = await Meteor.callAsync('pinMessage', msg);

			const [message] = await normalizeMessagesForUser([pinnedMessage], this.userId);

			return API.v1.success({
				message,
			});
		},
	},
);

API.v1.addRoute(
	'chat.postMessage',
	{ authRequired: true },
	{
		async post() {
			const messageReturn = (await processWebhookMessage(this.bodyParams, this.user))[0];

			if (!messageReturn) {
				return API.v1.failure('unknown-error');
			}

			const [message] = await normalizeMessagesForUser([messageReturn.message], this.userId);

			return API.v1.success({
				ts: Date.now(),
				channel: messageReturn.channel,
				message,
			});
		},
	},
);

API.v1.addRoute(
	'chat.search',
	{ authRequired: true },
	{
		async get() {
			const { roomId, searchText } = this.queryParams;
			const { offset, count } = await getPaginationItems(this.queryParams);

			if (!roomId) {
				throw new Meteor.Error('error-roomId-param-not-provided', 'The required "roomId" query param is missing.');
			}

			if (!searchText) {
				throw new Meteor.Error('error-searchText-param-not-provided', 'The required "searchText" query param is missing.');
			}

			const result = (await Meteor.callAsync('messageSearch', searchText, roomId, count, offset)).message.docs;

			return API.v1.success({
				messages: await normalizeMessagesForUser(result, this.userId),
			});
		},
	},
);

// The difference between `chat.postMessage` and `chat.sendMessage` is that `chat.sendMessage` allows
// for passing a value for `_id` and the other one doesn't. Also, `chat.sendMessage` only sends it to
// one channel whereas the other one allows for sending to more than one channel at a time.
API.v1.addRoute(
	'chat.sendMessage',
	{ authRequired: true },
	{
		async post() {
			if (!this.bodyParams.message) {
				throw new Meteor.Error('error-invalid-params', 'The "message" parameter must be provided.');
			}

			const sent = await executeSendMessage(this.userId, this.bodyParams.message as Pick<IMessage, 'rid'>);
			const [message] = await normalizeMessagesForUser([sent], this.userId);

			return API.v1.success({
				message,
			});
		},
	},
);

API.v1.addRoute(
	'chat.starMessage',
	{ authRequired: true },
	{
		async post() {
			if (!this.bodyParams.messageId?.trim()) {
				throw new Meteor.Error('error-messageid-param-not-provided', 'The required "messageId" param is required.');
			}

			const msg = await Messages.findOneById(this.bodyParams.messageId);

			if (!msg) {
				throw new Meteor.Error('error-message-not-found', 'The provided "messageId" does not match any existing message.');
			}

			await Meteor.callAsync('starMessage', {
				_id: msg._id,
				rid: msg.rid,
				starred: true,
			});

			return API.v1.success();
		},
	},
);

API.v1.addRoute(
	'chat.unPinMessage',
	{ authRequired: true },
	{
		async post() {
			if (!this.bodyParams.messageId?.trim()) {
				throw new Meteor.Error('error-messageid-param-not-provided', 'The required "messageId" param is required.');
			}

			const msg = await Messages.findOneById(this.bodyParams.messageId);

			if (!msg) {
				throw new Meteor.Error('error-message-not-found', 'The provided "messageId" does not match any existing message.');
			}

			await Meteor.callAsync('unpinMessage', msg);

			return API.v1.success();
		},
	},
);

API.v1.addRoute(
	'chat.unStarMessage',
	{ authRequired: true },
	{
		async post() {
			if (!this.bodyParams.messageId?.trim()) {
				throw new Meteor.Error('error-messageid-param-not-provided', 'The required "messageId" param is required.');
			}

			const msg = await Messages.findOneById(this.bodyParams.messageId);

			if (!msg) {
				throw new Meteor.Error('error-message-not-found', 'The provided "messageId" does not match any existing message.');
			}

			await Meteor.callAsync('starMessage', {
				_id: msg._id,
				rid: msg.rid,
				starred: false,
			});

			return API.v1.success();
		},
	},
);

API.v1.addRoute(
	'chat.update',
	{ authRequired: true },
	{
		async post() {
			check(
				this.bodyParams,
				Match.ObjectIncluding({
					roomId: String,
					msgId: String,
					text: String, // Using text to be consistant with chat.postMessage
				}),
			);

			const msg = await Messages.findOneById(this.bodyParams.msgId);

			// Ensure the message exists
			if (!msg) {
				return API.v1.failure(`No message found with the id of "${this.bodyParams.msgId}".`);
			}

			if (this.bodyParams.roomId !== msg.rid) {
				return API.v1.failure('The room id provided does not match where the message is from.');
			}

			// Permission checks are already done in the updateMessage method, so no need to duplicate them
			await Meteor.callAsync('updateMessage', { _id: msg._id, msg: this.bodyParams.text, rid: msg.rid });

			const updatedMessage = await Messages.findOneById(msg._id);
			const [message] = await normalizeMessagesForUser(updatedMessage ? [updatedMessage] : [], this.userId);

			return API.v1.success({
				message,
			});
		},
	},
);

API.v1.addRoute(
	'chat.react',
	{ authRequired: true },
	{
		async post() {
			if (!this.bodyParams.messageId?.trim()) {
				throw new Meteor.Error('error-messageid-param-not-provided', 'The required "messageId" param is missing.');
			}

			const msg = await Messages.findOneById(this.bodyParams.messageId);

			if (!msg) {
				throw new Meteor.Error('error-message-not-found', 'The provided "messageId" does not match any existing message.');
			}

			const emoji = 'emoji' in this.bodyParams ? this.bodyParams.emoji : (this.bodyParams as { reaction: string }).reaction;

			if (!emoji) {
				throw new Meteor.Error('error-emoji-param-not-provided', 'The required "emoji" param is missing.');
			}

			await executeSetReaction(this.userId, emoji, msg._id, this.bodyParams.shouldReact);

			return API.v1.success();
		},
	},
);

API.v1.addRoute(
	'chat.reportMessage',
	{ authRequired: true, validateParams: isChatReportMessageProps },
	{
		async post() {
			const { messageId, description } = this.bodyParams;
			if (!messageId) {
				return API.v1.failure('The required "messageId" param is missing.');
			}

			if (!description) {
				return API.v1.failure('The required "description" param is missing.');
			}

			await reportMessage(messageId, description, this.userId);

			return API.v1.success();
		},
	},
);

API.v1.addRoute(
	'chat.ignoreUser',
	{ authRequired: true },
	{
		async get() {
			const { rid, userId } = this.queryParams;
			let { ignore = true } = this.queryParams;

			ignore = typeof ignore === 'string' ? /true|1/.test(ignore) : ignore;

			if (!rid?.trim()) {
				throw new Meteor.Error('error-room-id-param-not-provided', 'The required "rid" param is missing.');
			}

			if (!userId?.trim()) {
				throw new Meteor.Error('error-user-id-param-not-provided', 'The required "userId" param is missing.');
			}

			await Meteor.callAsync('ignoreUser', { rid, userId, ignore });

			return API.v1.success();
		},
	},
);

API.v1.addRoute(
	'chat.getDeletedMessages',
	{ authRequired: true },
	{
		async get() {
			const { roomId, since } = this.queryParams;
			const { offset, count } = await getPaginationItems(this.queryParams);

			if (!roomId) {
				throw new Meteor.Error('The required "roomId" query param is missing.');
			}

			if (!since) {
				throw new Meteor.Error('The required "since" query param is missing.');
			} else if (isNaN(Date.parse(since))) {
				throw new Meteor.Error('The "since" query parameter must be a valid date.');
			}

			const { cursor, totalCount } = await Messages.trashFindPaginatedDeletedAfter(
				new Date(since),
				{ rid: roomId },
				{
					skip: offset,
					limit: count,
					projection: { _id: 1 },
				},
			);

			const [messages, total] = await Promise.all([cursor.toArray(), totalCount]);

			return API.v1.success({
				messages,
				count: messages.length,
				offset,
				total,
			});
		},
	},
);

API.v1.addRoute(
	'chat.getPinnedMessages',
	{ authRequired: true },
	{
		async get() {
			const { roomId } = this.queryParams;
			const { offset, count } = await getPaginationItems(this.queryParams);

			if (!roomId) {
				throw new Meteor.Error('error-roomId-param-not-provided', 'The required "roomId" query param is missing.');
			}

			if (!(await canAccessRoomIdAsync(roomId, this.userId))) {
				throw new Meteor.Error('error-not-allowed', 'Not allowed');
			}

			const { cursor, totalCount } = await Messages.findPaginatedPinnedByRoom(roomId, {
				skip: offset,
				limit: count,
			});

			const [messages, total] = await Promise.all([cursor.toArray(), totalCount]);

			return API.v1.success({
				messages: await normalizeMessagesForUser(messages, this.userId),
				count: messages.length,
				offset,
				total,
			});
		},
	},
);

API.v1.addRoute(
	'chat.getThreadsList',
	{ authRequired: true },
	{
		async get() {
			const { rid, type, text } = this.queryParams;
			check(rid, String);
			check(type, Match.Maybe(String));
			check(text, Match.Maybe(String));

			const { offset, count } = await getPaginationItems(this.queryParams);
			const { sort, fields, query } = await this.parseJsonQuery();

			if (!settings.get<boolean>('Threads_enabled')) {
				throw new Meteor.Error('error-not-allowed', 'Threads Disabled');
			}
			const user = await Users.findOneById(this.userId, { projection: { _id: 1 } });
			const room = await Rooms.findOneById(rid, { projection: { ...roomAccessAttributes, t: 1, _id: 1 } });

			if (!room || !user || !(await canAccessRoomAsync(room, user))) {
				throw new Meteor.Error('error-not-allowed', 'Not Allowed');
			}

			const typeThread = {
				_hidden: { $ne: true },
				...(type === 'following' && { replies: { $in: [this.userId] } }),
				...(type === 'unread' && { _id: { $in: (await Subscriptions.findOneByRoomIdAndUserId(room._id, user._id))?.tunread || [] } }),
				msg: new RegExp(escapeRegExp(text || ''), 'i'),
			};

			const threadQuery = { ...query, ...typeThread, rid: room._id, tcount: { $exists: true } };
			const { cursor, totalCount } = await Messages.findPaginated(threadQuery, {
				sort: sort || { tlm: -1 },
				skip: offset,
				limit: count,
				projection: fields,
			});

			const [threads, total] = await Promise.all([cursor.toArray(), totalCount]);

			return API.v1.success({
				threads: await normalizeMessagesForUser(threads, this.userId),
				count: threads.length,
				offset,
				total,
			});
		},
	},
);

API.v1.addRoute(
	'chat.syncThreadsList',
	{ authRequired: true },
	{
		async get() {
			const { rid } = this.queryParams;
			const { query, fields, sort } = await this.parseJsonQuery();
			const { updatedSince } = this.queryParams;
			let updatedSinceDate;
			if (!settings.get<boolean>('Threads_enabled')) {
				throw new Meteor.Error('error-not-allowed', 'Threads Disabled');
			}
			if (!rid) {
				throw new Meteor.Error('error-room-id-param-not-provided', 'The required "rid" query param is missing.');
			}
			if (!updatedSince) {
				throw new Meteor.Error('error-updatedSince-param-invalid', 'The required param "updatedSince" is missing.');
			}
			if (isNaN(Date.parse(updatedSince))) {
				throw new Meteor.Error('error-updatedSince-param-invalid', 'The "updatedSince" query parameter must be a valid date.');
			} else {
				updatedSinceDate = new Date(updatedSince);
			}
			const user = await Users.findOneById(this.userId, { projection: { _id: 1 } });
			const room = await Rooms.findOneById(rid, { projection: { ...roomAccessAttributes, t: 1, _id: 1 } });

			if (!room || !user || !(await canAccessRoomAsync(room, user))) {
				throw new Meteor.Error('error-not-allowed', 'Not Allowed');
			}
			const threadQuery = Object.assign({}, query, { rid, tcount: { $exists: true } });
			return API.v1.success({
				threads: {
					update: await Messages.find(
						{ ...threadQuery, _updatedAt: { $gt: updatedSinceDate } },
						{
							sort,
							projection: fields,
						},
					).toArray(),
					remove: await Messages.trashFindDeletedAfter(updatedSinceDate, threadQuery, {
						sort,
						projection: fields,
					}).toArray(),
				},
			});
		},
	},
);

API.v1.addRoute(
	'chat.getThreadMessages',
	{ authRequired: true },
	{
		async get() {
			const { tmid } = this.queryParams;
			const { query, fields, sort } = await this.parseJsonQuery();
			const { offset, count } = await getPaginationItems(this.queryParams);

			if (!settings.get('Threads_enabled')) {
				throw new Meteor.Error('error-not-allowed', 'Threads Disabled');
			}
			if (!tmid) {
				throw new Meteor.Error('error-invalid-params', 'The required "tmid" query param is missing.');
			}
			const thread = await Messages.findOneById(tmid, { projection: { rid: 1 } });
			if (!thread?.rid) {
				throw new Meteor.Error('error-invalid-message', 'Invalid Message');
			}
			const user = await Users.findOneById(this.userId, { projection: { _id: 1 } });
			const room = await Rooms.findOneById(thread.rid, { projection: { ...roomAccessAttributes, t: 1, _id: 1 } });

			if (!room || !user || !(await canAccessRoomAsync(room, user))) {
				throw new Meteor.Error('error-not-allowed', 'Not Allowed');
			}
			const { cursor, totalCount } = await Messages.findPaginated(
				{ ...query, tmid },
				{
					sort: sort || { ts: 1 },
					skip: offset,
					limit: count,
					projection: fields,
				},
			);

			const [messages, total] = await Promise.all([cursor.toArray(), totalCount]);

			return API.v1.success({
				messages,
				count: messages.length,
				offset,
				total,
			});
		},
	},
);

API.v1.addRoute(
	'chat.syncThreadMessages',
	{ authRequired: true },
	{
		async get() {
			const { tmid } = this.queryParams;
			const { query, fields, sort } = await this.parseJsonQuery();
			const { updatedSince } = this.queryParams;
			let updatedSinceDate;
			if (!settings.get<boolean>('Threads_enabled')) {
				throw new Meteor.Error('error-not-allowed', 'Threads Disabled');
			}
			if (!tmid) {
				throw new Meteor.Error('error-invalid-params', 'The required "tmid" query param is missing.');
			}
			if (!updatedSince) {
				throw new Meteor.Error('error-updatedSince-param-invalid', 'The required param "updatedSince" is missing.');
			}
			if (isNaN(Date.parse(updatedSince))) {
				throw new Meteor.Error('error-updatedSince-param-invalid', 'The "updatedSince" query parameter must be a valid date.');
			} else {
				updatedSinceDate = new Date(updatedSince);
			}
			const thread = await Messages.findOneById(tmid, { projection: { rid: 1 } });
			if (!thread?.rid) {
				throw new Meteor.Error('error-invalid-message', 'Invalid Message');
			}
			const user = await Users.findOneById(this.userId, { projection: { _id: 1 } });
			const room = await Rooms.findOneById(thread.rid, { projection: { ...roomAccessAttributes, t: 1, _id: 1 } });

			if (!room || !user || !(await canAccessRoomAsync(room, user))) {
				throw new Meteor.Error('error-not-allowed', 'Not Allowed');
			}
			return API.v1.success({
				messages: {
					update: await Messages.find({ ...query, tmid, _updatedAt: { $gt: updatedSinceDate } }, { projection: fields, sort }).toArray(),
					remove: await Messages.trashFindDeletedAfter(updatedSinceDate, { ...query, tmid }, { projection: fields, sort }).toArray(),
				},
			});
		},
	},
);

API.v1.addRoute(
	'chat.followMessage',
	{ authRequired: true },
	{
		async post() {
			const { mid } = this.bodyParams;

			if (!mid) {
				throw new Meteor.Error('The required "mid" body param is missing.');
			}

			await Meteor.callAsync('followMessage', { mid });

			return API.v1.success();
		},
	},
);

API.v1.addRoute(
	'chat.unfollowMessage',
	{ authRequired: true },
	{
		async post() {
			const { mid } = this.bodyParams;

			if (!mid) {
				throw new Meteor.Error('The required "mid" body param is missing.');
			}

			await Meteor.callAsync('unfollowMessage', { mid });

			return API.v1.success();
		},
	},
);

API.v1.addRoute(
	'chat.getMentionedMessages',
	{ authRequired: true },
	{
		async get() {
			const { roomId } = this.queryParams;
			const { sort } = await this.parseJsonQuery();
			const { offset, count } = await getPaginationItems(this.queryParams);
			if (!roomId) {
				throw new Meteor.Error('error-invalid-params', 'The required "roomId" query param is missing.');
			}
			const messages = await findMentionedMessages({
				uid: this.userId,
				roomId,
				pagination: {
					offset,
					count,
					sort,
				},
			});

			return API.v1.success(messages);
		},
	},
);

API.v1.addRoute(
	'chat.getStarredMessages',
	{ authRequired: true },
	{
		async get() {
			const { roomId } = this.queryParams;
			const { sort } = await this.parseJsonQuery();
			const { offset, count } = await getPaginationItems(this.queryParams);

			if (!roomId) {
				throw new Meteor.Error('error-invalid-params', 'The required "roomId" query param is missing.');
			}
			const messages = await findStarredMessages({
				uid: this.userId,
				roomId,
				pagination: {
					offset,
					count,
					sort,
				},
			});

			messages.messages = await normalizeMessagesForUser(messages.messages, this.userId);

			return API.v1.success(messages);
		},
	},
);

API.v1.addRoute(
	'chat.getDiscussions',
	{ authRequired: true },
	{
		async get() {
			const { roomId, text } = this.queryParams;
			const { sort } = await this.parseJsonQuery();
			const { offset, count } = await getPaginationItems(this.queryParams);

			if (!roomId) {
				throw new Meteor.Error('error-invalid-params', 'The required "roomId" query param is missing.');
			}
			const messages = await findDiscussionsFromRoom({
				uid: this.userId,
				roomId,
				text: text || '',
				pagination: {
					offset,
					count,
					sort,
				},
			});
			return API.v1.success(messages);
		},
	},
);

API.v1.addRoute(
	'chat.otr',
	{ authRequired: true },
	{
		async post() {
			const { roomId, type: otrType } = this.bodyParams;

			if (!roomId) {
				throw new Meteor.Error('error-invalid-params', 'The required "roomId" query param is missing.');
			}

			if (!otrType) {
				throw new Meteor.Error('error-invalid-params', 'The required "type" query param is missing.');
			}

			const { username, type } = this.user;

			if (!username) {
				throw new Meteor.Error('error-invalid-user', 'Invalid user');
			}

			await canSendMessageAsync(roomId, { uid: this.userId, username, type });

			await Message.saveSystemMessage(otrType, roomId, username, { _id: this.userId, username });

			return API.v1.success();
		},
	},
);