import React from 'react';
import { connect } from 'react-redux';
import PropTypes from 'prop-types';
import { ScrollView, Text, Switch } from 'react-native';

import Loading from '../../containers/Loading';
import KeyboardView from '../../presentation/KeyboardView';
import scrollPersistTaps from '../../utils/scrollPersistTaps';
import I18n from '../../i18n';
import * as HeaderButton from '../../containers/HeaderButton';
import StatusBar from '../../containers/StatusBar';
import { SWITCH_TRACK_COLOR, themes } from '../../constants/colors';
import { withTheme } from '../../theme';
import { getUserSelector } from '../../selectors/login';
import TextInput from '../../containers/TextInput';
import RocketChat from '../../lib/rocketchat';
import Navigation from '../../lib/Navigation';
import { createDiscussionRequest } from '../../actions/createDiscussion';
import { showErrorAlert } from '../../utils/info';

import SelectChannel from './SelectChannel';
import SelectUsers from './SelectUsers';

import styles from './styles';
import SafeAreaView from '../../containers/SafeAreaView';
import { goRoom } from '../../utils/goRoom';
import { logEvent, events } from '../../utils/log';
import { E2E_ROOM_TYPES } from '../../lib/encryption/constants';

class CreateChannelView extends React.Component {
	propTypes = {
		navigation: PropTypes.object,
		route: PropTypes.object,
		server: PropTypes.string,
		user: PropTypes.object,
		create: PropTypes.func,
		loading: PropTypes.bool,
		result: PropTypes.object,
		failure: PropTypes.bool,
		error: PropTypes.object,
		theme: PropTypes.string,
		isMasterDetail: PropTypes.bool,
		blockUnauthenticatedAccess: PropTypes.bool,
		serverVersion: PropTypes.string,
		encryptionEnabled: PropTypes.bool
	}

	constructor(props) {
		super(props);
		const { route } = props;
		this.channel = route.params?.channel;
		const message = route.params?.message ?? {};
		this.state = {
			channel: this.channel,
			message,
			name: message?.msg || '',
			users: [],
			reply: '',
			encrypted: props.encryptionEnabled
		};
		this.setHeader();
	}

	componentDidUpdate(prevProps, prevState) {
		const { channel, name } = this.state;
		const {
			loading, failure, error, result, isMasterDetail
		} = this.props;

		if (channel?.rid !== prevState.channel?.rid || name !== prevState.name) {
			this.setHeader();
		}

		if (!loading && loading !== prevProps.loading) {
			setTimeout(() => {
				if (failure) {
					const msg = error.reason || I18n.t('There_was_an_error_while_action', { action: I18n.t('creating_discussion') });
					showErrorAlert(msg);
				} else {
					const { rid, t, prid } = result;
					if (isMasterDetail) {
						Navigation.navigate('DrawerNavigator');
					} else {
						Navigation.navigate('RoomsListView');
					}
					const item = {
						rid, name: RocketChat.getRoomTitle(result), t, prid
					};
					goRoom({ item, isMasterDetail });
				}
			}, 300);
		}
	}

	setHeader = () => {
		const { navigation, route } = this.props;
		const showCloseModal = route.params?.showCloseModal;
		navigation.setOptions({
			title: I18n.t('Create_Discussion'),
			headerRight: (
				this.valid()
					? () => (
						<HeaderButton.Container>
							<HeaderButton.Item title={I18n.t('Create')} onPress={this.submit} testID='create-discussion-submit' />
						</HeaderButton.Container>
					)
					: null
			),
			headerLeft: showCloseModal ? () => <HeaderButton.CloseModal navigation={navigation} /> : undefined
		});
	}

	submit = () => {
		const {
			name: t_name, channel: { prid, rid }, message: { id: pmid }, reply, users, encrypted
		} = this.state;
		const { create } = this.props;

		const params = {
			prid: prid || rid, pmid, t_name, reply, users
		};
		if (this.isEncryptionEnabled) {
			params.encrypted = encrypted ?? false;
		}

		create(params);
	};

	valid = () => {
		const {
			channel, name
		} = this.state;

		return (
			channel
			&& channel.rid
			&& channel.rid.trim().length
			&& name.trim().length
		);
	};

	selectChannel = ({ value }) => {
		logEvent(events.CD_SELECT_CHANNEL);
		this.setState({ channel: value, encrypted: value?.encrypted });
	}

	selectUsers = ({ value }) => {
		logEvent(events.CD_SELECT_USERS);
		this.setState({ users: value });
	}

	get isEncryptionEnabled() {
		const { channel } = this.state;
		const { encryptionEnabled } = this.props;
		return encryptionEnabled && E2E_ROOM_TYPES[channel?.t];
	}

	onEncryptedChange = (value) => {
		logEvent(events.CD_TOGGLE_ENCRY);
		this.setState({ encrypted: value });
	}

	render() {
		const {
			name, users, encrypted
		} = this.state;
		const {
			server, user, loading, blockUnauthenticatedAccess, theme, serverVersion
		} = this.props;
		return (
			<KeyboardView
				style={{ backgroundColor: themes[theme].auxiliaryBackground }}
				contentContainerStyle={styles.container}
				keyboardVerticalOffset={128}
			>
				<StatusBar />
				<SafeAreaView testID='create-discussion-view' style={styles.container}>
					<ScrollView {...scrollPersistTaps}>
						<Text style={[styles.description, { color: themes[theme].auxiliaryText }]}>{I18n.t('Discussion_Desc')}</Text>
						<SelectChannel
							server={server}
							userId={user.id}
							token={user.token}
							initial={this.channel && { text: RocketChat.getRoomTitle(this.channel) }}
							onChannelSelect={this.selectChannel}
							blockUnauthenticatedAccess={blockUnauthenticatedAccess}
							serverVersion={serverVersion}
							theme={theme}
						/>
						<TextInput
							label={I18n.t('Discussion_name')}
							testID='multi-select-discussion-name'
							placeholder={I18n.t('A_meaningful_name_for_the_discussion_room')}
							containerStyle={styles.inputStyle}
							defaultValue={name}
							onChangeText={text => this.setState({ name: text })}
							theme={theme}
						/>
						<SelectUsers
							server={server}
							userId={user.id}
							token={user.token}
							selected={users}
							onUserSelect={this.selectUsers}
							blockUnauthenticatedAccess={blockUnauthenticatedAccess}
							serverVersion={serverVersion}
							theme={theme}
						/>
						{this.isEncryptionEnabled
							? (
								<>
									<Text style={[styles.label, { color: themes[theme].titleText }]}>{I18n.t('Encrypted')}</Text>
									<Switch
										value={encrypted}
										onValueChange={this.onEncryptedChange}
										trackColor={SWITCH_TRACK_COLOR}
									/>
								</>
							) : null}
						<Loading visible={loading} />
					</ScrollView>
				</SafeAreaView>
			</KeyboardView>
		);
	}
}

const mapStateToProps = state => ({
	user: getUserSelector(state),
	server: state.server.server,
	error: state.createDiscussion.error,
	failure: state.createDiscussion.failure,
	loading: state.createDiscussion.isFetching,
	result: state.createDiscussion.result,
	blockUnauthenticatedAccess: state.settings.Accounts_AvatarBlockUnauthenticatedAccess ?? true,
	serverVersion: state.server.version,
	isMasterDetail: state.app.isMasterDetail,
	encryptionEnabled: state.encryption.enabled
});

const mapDispatchToProps = dispatch => ({
	create: data => dispatch(createDiscussionRequest(data))
});

export default connect(mapStateToProps, mapDispatchToProps)(withTheme(CreateChannelView));