import moment from 'moment';

import I18n from '../../i18n';
import database from '../../lib/realm';
import { DISCUSSION } from './constants';

export const formatLastMessage = (lm, customFormat) => {
	if (customFormat) {
		return moment(lm).format(customFormat);
	}
	return lm ? moment(lm).calendar(null, {
		lastDay: `[${ I18n.t('Yesterday') }]`,
		sameDay: 'h:mm A',
		lastWeek: 'dddd',
		sameElse: 'MMM D'
	}) : null;
};

export const formatMessageCount = (count, type) => {
	const discussion = type === DISCUSSION;
	let text = discussion ? I18n.t('No_messages_yet') : null;
	if (count === 1) {
		text = `${ count } ${ discussion ? I18n.t('message') : I18n.t('reply') }`;
	} else if (count > 1 && count < 1000) {
		text = `${ count } ${ discussion ? I18n.t('messages') : I18n.t('replies') }`;
	} else if (count > 999) {
		text = `+999 ${ discussion ? I18n.t('messages') : I18n.t('replies') }`;
	}
	return text;
};

export const BUTTON_HIT_SLOP = {
	top: 4, right: 4, bottom: 4, left: 4
};

export const SYSTEM_MESSAGES = [
	'r',
	'au',
	'ru',
	'ul',
	'uj',
	'ut',
	'rm',
	'user-muted',
	'user-unmuted',
	'message_pinned',
	'subscription-role-added',
	'subscription-role-removed',
	'room_changed_description',
	'room_changed_announcement',
	'room_changed_topic',
	'room_changed_privacy',
	'message_snippeted',
	'thread-created'
];

export const getInfoMessage = ({
	type, role, msg, author
}) => {
	const { username } = author;
	if (type === 'rm') {
		return I18n.t('Message_removed');
	} else if (type === 'uj') {
		return I18n.t('Has_joined_the_channel');
	} else if (type === 'ut') {
		return I18n.t('Has_joined_the_conversation');
	} else if (type === 'r') {
		return I18n.t('Room_name_changed', { name: msg, userBy: username });
	} else if (type === 'message_pinned') {
		return I18n.t('Message_pinned');
	} else if (type === 'ul') {
		return I18n.t('Has_left_the_channel');
	} else if (type === 'ru') {
		return I18n.t('User_removed_by', { userRemoved: msg, userBy: username });
	} else if (type === 'au') {
		return I18n.t('User_added_by', { userAdded: msg, userBy: username });
	} else if (type === 'user-muted') {
		return I18n.t('User_muted_by', { userMuted: msg, userBy: username });
	} else if (type === 'user-unmuted') {
		return I18n.t('User_unmuted_by', { userUnmuted: msg, userBy: username });
	} else if (type === 'subscription-role-added') {
		return `${ msg } was set ${ role } by ${ username }`;
	} else if (type === 'subscription-role-removed') {
		return `${ msg } is no longer ${ role } by ${ username }`;
	} else if (type === 'room_changed_description') {
		return I18n.t('Room_changed_description', { description: msg, userBy: username });
	} else if (type === 'room_changed_announcement') {
		return I18n.t('Room_changed_announcement', { announcement: msg, userBy: username });
	} else if (type === 'room_changed_topic') {
		return I18n.t('Room_changed_topic', { topic: msg, userBy: username });
	} else if (type === 'room_changed_privacy') {
		return I18n.t('Room_changed_privacy', { type: msg, userBy: username });
	} else if (type === 'message_snippeted') {
		return I18n.t('Created_snippet');
	}
	return '';
};

export const getCustomEmoji = (content) => {
	// search by name
	const data = database.objects('customEmojis').filtered('name == $0', content);
	if (data.length) {
		return data[0];
	}

	// searches by alias
	// RealmJS doesn't support IN operator: https://github.com/realm/realm-js/issues/450
	const emojis = database.objects('customEmojis');
	const findByAlias = emojis.find((emoji) => {
		if (emoji.aliases.length && emoji.aliases.findIndex(alias => alias === content) !== -1) {
			return true;
		}
		return false;
	});
	return findByAlias;
};