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

import StatusBar from '../containers/StatusBar';
import * as List from '../containers/List';
import I18n from '../i18n';
import log, { logEvent, events } from '../utils/log';
import { withTheme } from '../theme';
import SafeAreaView from '../containers/SafeAreaView';
import TextInput from '../containers/TextInput';
import Button from '../containers/Button';
import { getUserSelector } from '../selectors/login';
import { PADDING_HORIZONTAL } from '../containers/List/constants';
import sharedStyles from './Styles';
import { themes } from '../constants/colors';
import { Encryption } from '../lib/encryption';
import RocketChat from '../lib/rocketchat';
import { logout as logoutAction } from '../actions/login';
import { showConfirmationAlert, showErrorAlert } from '../utils/info';
import EventEmitter from '../utils/events';
import { LISTENER } from '../containers/Toast';
import debounce from '../utils/debounce';

const styles = StyleSheet.create({
	container: {
		paddingHorizontal: PADDING_HORIZONTAL
	},
	title: {
		fontSize: 16,
		...sharedStyles.textMedium
	},
	description: {
		fontSize: 14,
		paddingVertical: 10,
		...sharedStyles.textRegular
	},
	changePasswordButton: {
		marginBottom: 4
	}
});

class E2EEncryptionSecurityView extends React.Component {
	state = { newPassword: '' }

	newPasswordInputRef = React.createRef();

	onChangePasswordText = debounce(text => this.setState({ newPassword: text }), 300)

	setNewPasswordRef = ref => this.newPasswordInputRef = ref;

	changePassword = () => {
		const { newPassword } = this.state;
		if (!newPassword.trim()) {
			return;
		}
		showConfirmationAlert({
			title: I18n.t('Are_you_sure_question_mark'),
			message: I18n.t('E2E_encryption_change_password_message'),
			confirmationText: I18n.t('E2E_encryption_change_password_confirmation'),
			onPress: async() => {
				logEvent(events.E2E_SEC_CHANGE_PASSWORD);
				try {
					const { server } = this.props;
					await Encryption.changePassword(server, newPassword);
					EventEmitter.emit(LISTENER, { message: I18n.t('E2E_encryption_change_password_success') });
					this.newPasswordInputRef?.clear();
					this.newPasswordInputRef?.blur();
				} catch (e) {
					log(e);
					showErrorAlert(I18n.t('E2E_encryption_change_password_error'));
				}
			}
		});
	}

	resetOwnKey = () => {
		showConfirmationAlert({
			title: I18n.t('Are_you_sure_question_mark'),
			message: I18n.t('E2E_encryption_reset_message'),
			confirmationText: I18n.t('E2E_encryption_reset_confirmation'),
			onPress: async() => {
				logEvent(events.E2E_SEC_RESET_OWN_KEY);
				try {
					const res = await RocketChat.e2eResetOwnKey();
					/**
					 * It might return an empty object when TOTP is enabled,
					 * that's why we're using strict equality to boolean
					 */
					if (res === true) {
						const { logout } = this.props;
						logout();
					}
				} catch (e) {
					log(e);
					showErrorAlert(I18n.t('E2E_encryption_reset_error'));
				}
			}
		});
	}

	renderChangePassword = () => {
		const { newPassword } = this.state;
		const { theme, encryptionEnabled } = this.props;
		if (!encryptionEnabled) {
			return null;
		}
		return (
			<>
				<List.Section>
					<Text style={[styles.title, { color: themes[theme].titleColor }]}>{I18n.t('E2E_encryption_change_password_title')}</Text>
					<Text style={[styles.description, { color: themes[theme].bodyText }]}>{I18n.t('E2E_encryption_change_password_description')}</Text>
					<TextInput
						inputRef={this.setNewPasswordRef}
						placeholder={I18n.t('New_Password')}
						returnKeyType='send'
						secureTextEntry
						onSubmitEditing={this.changePassword}
						testID='e2e-encryption-security-view-password'
						theme={theme}
						onChangeText={this.onChangePasswordText}
					/>
					<Button
						onPress={this.changePassword}
						title={I18n.t('Save_Changes')}
						theme={theme}
						disabled={!newPassword.trim()}
						style={styles.changePasswordButton}
						testID='e2e-encryption-security-view-change-password'
					/>
				</List.Section>

				<List.Separator />
			</>
		);
	}

	render() {
		const { theme } = this.props;
		return (
			<SafeAreaView testID='e2e-encryption-security-view' style={{ backgroundColor: themes[theme].backgroundColor }}>
				<StatusBar theme={theme} />
				<List.Container>
					<View style={styles.container}>
						{this.renderChangePassword()}

						<List.Section>
							<Text style={[styles.title, { color: themes[theme].titleColor }]}>{I18n.t('E2E_encryption_reset_title')}</Text>
							<Text style={[styles.description, { color: themes[theme].bodyText }]}>{I18n.t('E2E_encryption_reset_description')}</Text>
							<Button
								onPress={this.resetOwnKey}
								title={I18n.t('E2E_encryption_reset_button')}
								theme={theme}
								type='secondary'
								backgroundColor={themes[theme].chatComponentBackground}
								testID='e2e-encryption-security-view-reset-key'
							/>
						</List.Section>
					</View>
				</List.Container>
			</SafeAreaView>
		);
	}
}

const mapStateToProps = state => ({
	server: state.server.server,
	user: getUserSelector(state),
	encryptionEnabled: state.encryption.enabled
});

const mapDispatchToProps = dispatch => ({
	logout: () => dispatch(logoutAction(true))
});

E2EEncryptionSecurityView.navigationOptions = () => ({
	title: I18n.t('E2E_Encryption')
});

E2EEncryptionSecurityView.propTypes = {
	theme: PropTypes.string,
	user: PropTypes.shape({
		roles: PropTypes.array,
		id: PropTypes.string
	}),
	server: PropTypes.string,
	encryptionEnabled: PropTypes.bool,
	logout: PropTypes.func
};

export default connect(mapStateToProps, mapDispatchToProps)(withTheme(E2EEncryptionSecurityView));