import React from 'react';
import PropTypes from 'prop-types';
import { View, ScrollView, Keyboard } from 'react-native';
import { connect } from 'react-redux';
import Dialog from 'react-native-dialog';
import SHA256 from 'js-sha256';
import ImagePicker from 'react-native-image-crop-picker';
import RNPickerSelect from 'react-native-picker-select';
import { SafeAreaView } from 'react-navigation';
import { HeaderBackButton } from 'react-navigation-stack';
import equal from 'deep-equal';

import KeyboardView from '../../presentation/KeyboardView';
import sharedStyles from '../Styles';
import styles from './styles';
import scrollPersistTaps from '../../utils/scrollPersistTaps';
import { showErrorAlert } from '../../utils/info';
import { LISTENER } from '../../containers/Toast';
import EventEmitter from '../../utils/events';
import RocketChat from '../../lib/rocketchat';
import RCTextInput from '../../containers/TextInput';
import log from '../../utils/log';
import I18n from '../../i18n';
import Button from '../../containers/Button';
import Avatar from '../../containers/Avatar';
import Touch from '../../utils/touch';
import { setUser as setUserAction } from '../../actions/login';
import { CustomIcon } from '../../lib/Icons';
import { DrawerButton } from '../../containers/HeaderButton';
import StatusBar from '../../containers/StatusBar';
import { COLOR_TEXT, HEADER_BACK } from '../../constants/colors';

class ProfileView extends React.Component {
	static navigationOptions = ({ navigation, screenProps }) => ({
		headerLeft: screenProps.split ? (
			<HeaderBackButton
				onPress={() => navigation.navigate('SettingsView')}
				tintColor={HEADER_BACK}
			/>
		) : (
			<DrawerButton navigation={navigation} />
		),
		title: I18n.t('Profile')
	})

	static propTypes = {
		baseUrl: PropTypes.string,
		user: PropTypes.object,
		Accounts_CustomFields: PropTypes.string,
		setUser: PropTypes.func
	}

	state = {
		showPasswordAlert: false,
		saving: false,
		name: null,
		username: null,
		email: null,
		newPassword: null,
		currentPassword: null,
		avatarUrl: null,
		avatar: {},
		avatarSuggestions: {},
		customFields: {}
	}

	async componentDidMount() {
		this.init();

		try {
			const result = await RocketChat.getAvatarSuggestion();
			this.setState({ avatarSuggestions: result });
		} catch (e) {
			log(e);
		}
	}

	componentWillReceiveProps(nextProps) {
		const { user } = this.props;
		if (user !== nextProps.user) {
			this.init(nextProps.user);
		}
	}

	shouldComponentUpdate(nextProps, nextState) {
		if (!equal(nextState, this.state)) {
			return true;
		}
		if (!equal(nextProps, this.props)) {
			return true;
		}
		return false;
	}

	setAvatar = (avatar) => {
		this.setState({ avatar });
	}

	init = (user) => {
		const { user: userProps } = this.props;
		const {
			name, username, emails, customFields
		} = user || userProps;

		this.setState({
			name,
			username,
			email: emails ? emails[0].address : null,
			newPassword: null,
			currentPassword: null,
			avatarUrl: null,
			avatar: {},
			customFields: customFields || {}
		});
	}

	formIsChanged = () => {
		const {
			name, username, email, newPassword, avatar, customFields
		} = this.state;
		const { user } = this.props;
		let customFieldsChanged = false;

		const customFieldsKeys = Object.keys(customFields);
		if (customFieldsKeys.length) {
			customFieldsKeys.forEach((key) => {
				if (!user.customFields || user.customFields[key] !== customFields[key]) {
					customFieldsChanged = true;
				}
			});
		}

		return !(user.name === name
			&& user.username === username
			&& !newPassword
			&& (user.emails && user.emails[0].address === email)
			&& !avatar.data
			&& !customFieldsChanged
		);
	}

	closePasswordAlert = () => {
		this.setState({ showPasswordAlert: false });
	}

	handleError = (e, func, action) => {
		if (e.data && e.data.errorType === 'error-too-many-requests') {
			return showErrorAlert(e.data.error);
		}
		showErrorAlert(
			I18n.t('There_was_an_error_while_action', { action: I18n.t(action) }),
			'',
			() => this.setState({ showPasswordAlert: false })
		);
	}

	submit = async() => {
		Keyboard.dismiss();

		if (!this.formIsChanged()) {
			return;
		}

		this.setState({ saving: true });

		const {
			name, username, email, newPassword, currentPassword, avatar, customFields
		} = this.state;
		const { user, setUser } = this.props;
		const params = {};

		// Name
		if (user.name !== name) {
			params.name = name;
		}

		// Username
		if (user.username !== username) {
			params.username = username;
		}

		// Email
		if (user.emails && user.emails[0].address !== email) {
			params.email = email;
		}

		// newPassword
		if (newPassword) {
			params.newPassword = newPassword;
		}

		// currentPassword
		if (currentPassword) {
			params.currentPassword = SHA256(currentPassword);
		}

		const requirePassword = !!params.email || newPassword;
		if (requirePassword && !params.currentPassword) {
			return this.setState({ showPasswordAlert: true, saving: false });
		}

		try {
			if (avatar.url) {
				try {
					await RocketChat.setAvatarFromService(avatar);
				} catch (e) {
					this.setState({ saving: false, currentPassword: null });
					return this.handleError(e, 'setAvatarFromService', 'changing_avatar');
				}
			}

			const result = await RocketChat.saveUserProfile(params, customFields);

			if (result.success) {
				if (customFields) {
					setUser({ customFields, ...params });
				} else {
					setUser({ ...params });
				}
				this.setState({ saving: false, showPasswordAlert: false });
				EventEmitter.emit(LISTENER, { message: I18n.t('Profile_saved_successfully') });
				this.init();
			}
		} catch (e) {
			this.setState({ saving: false, currentPassword: null });
			this.handleError(e, 'saveUserProfile', 'saving_profile');
		}
	}

	resetAvatar = async() => {
		try {
			const { user } = this.props;
			await RocketChat.resetAvatar(user.id);
			EventEmitter.emit(LISTENER, { message: I18n.t('Avatar_changed_successfully') });
			this.init();
		} catch (e) {
			this.handleError(e, 'resetAvatar', 'changing_avatar');
		}
	}

	pickImage = async() => {
		const options = {
			cropping: true,
			compressImageQuality: 0.8,
			cropperAvoidEmptySpaceAroundImage: false,
			cropperChooseText: I18n.t('Choose'),
			cropperCancelText: I18n.t('Cancel'),
			includeBase64: true
		};
		try {
			const response = await ImagePicker.openPicker(options);
			this.setAvatar({ url: response.path, data: `data:image/jpeg;base64,${ response.data }`, service: 'upload' });
		} catch (error) {
			console.warn(error);
		}
	}

	renderAvatarButton = ({
		key, child, onPress, disabled = false
	}) => (
		<Touch
			key={key}
			testID={key}
			onPress={onPress}
			underlayColor='rgba(255, 255, 255, 0.5)'
			activeOpacity={0.3}
			disabled={disabled}
		>
			<View
				style={[styles.avatarButton, { opacity: disabled ? 0.5 : 1 }]}
			>
				{child}
			</View>
		</Touch>
	)

	renderAvatarButtons = () => {
		const { avatarUrl, avatarSuggestions } = this.state;
		const { user, baseUrl } = this.props;

		return (
			<View style={styles.avatarButtons}>
				{this.renderAvatarButton({
					child: <Avatar text={`@${ user.username }`} size={50} baseUrl={baseUrl} userId={user.id} token={user.token} />,
					onPress: () => this.resetAvatar(),
					key: 'profile-view-reset-avatar'
				})}
				{this.renderAvatarButton({
					child: <CustomIcon name='upload' size={30} color={COLOR_TEXT} />,
					onPress: () => this.pickImage(),
					key: 'profile-view-upload-avatar'
				})}
				{this.renderAvatarButton({
					child: <CustomIcon name='permalink' size={30} color={COLOR_TEXT} />,
					onPress: () => this.setAvatar({ url: avatarUrl, data: avatarUrl, service: 'url' }),
					disabled: !avatarUrl,
					key: 'profile-view-avatar-url-button'
				})}
				{Object.keys(avatarSuggestions).map((service) => {
					const { url, blob, contentType } = avatarSuggestions[service];
					return this.renderAvatarButton({
						key: `profile-view-avatar-${ service }`,
						child: <Avatar avatar={url} size={50} baseUrl={baseUrl} userId={user.id} token={user.token} />,
						onPress: () => this.setAvatar({
							url, data: blob, service, contentType
						})
					});
				})}
			</View>
		);
	}

	renderCustomFields = () => {
		const { customFields } = this.state;
		const { Accounts_CustomFields } = this.props;

		if (!Accounts_CustomFields) {
			return null;
		}
		try {
			const parsedCustomFields = JSON.parse(Accounts_CustomFields);
			return Object.keys(parsedCustomFields).map((key, index, array) => {
				if (parsedCustomFields[key].type === 'select') {
					const options = parsedCustomFields[key].options.map(option => ({ label: option, value: option }));
					return (
						<RNPickerSelect
							key={key}
							items={options}
							onValueChange={(value) => {
								const newValue = {};
								newValue[key] = value;
								this.setState({ customFields: { ...customFields, ...newValue } });
							}}
							value={customFields[key]}
						>
							<RCTextInput
								inputRef={(e) => { this[key] = e; }}
								label={key}
								placeholder={key}
								value={customFields[key]}
								testID='settings-view-language'
							/>
						</RNPickerSelect>
					);
				}

				return (
					<RCTextInput
						inputRef={(e) => { this[key] = e; }}
						key={key}
						label={key}
						placeholder={key}
						value={customFields[key]}
						onChangeText={(value) => {
							const newValue = {};
							newValue[key] = value;
							this.setState({ customFields: { ...customFields, ...newValue } });
						}}
						onSubmitEditing={() => {
							if (array.length - 1 > index) {
								return this[array[index + 1]].focus();
							}
							this.avatarUrl.focus();
						}}
					/>
				);
			});
		} catch (error) {
			return null;
		}
	}

	render() {
		const {
			name, username, email, newPassword, avatarUrl, customFields, avatar, saving, showPasswordAlert
		} = this.state;
		const { baseUrl, user, Accounts_CustomFields } = this.props;

		return (
			<KeyboardView
				contentContainerStyle={sharedStyles.container}
				keyboardVerticalOffset={128}
			>
				<StatusBar />
				<ScrollView
					contentContainerStyle={sharedStyles.containerScrollView}
					testID='profile-view-list'
					{...scrollPersistTaps}
				>
					<SafeAreaView style={sharedStyles.container} testID='profile-view' forceInset={{ vertical: 'never' }}>
						<View style={styles.avatarContainer} testID='profile-view-avatar'>
							<Avatar
								text={username}
								avatar={avatar && avatar.url}
								size={100}
								baseUrl={baseUrl}
								userId={user.id}
								token={user.token}
							/>
						</View>
						<RCTextInput
							inputRef={(e) => { this.name = e; }}
							label={I18n.t('Name')}
							placeholder={I18n.t('Name')}
							value={name}
							onChangeText={value => this.setState({ name: value })}
							onSubmitEditing={() => { this.username.focus(); }}
							testID='profile-view-name'
						/>
						<RCTextInput
							inputRef={(e) => { this.username = e; }}
							label={I18n.t('Username')}
							placeholder={I18n.t('Username')}
							value={username}
							onChangeText={value => this.setState({ username: value })}
							onSubmitEditing={() => { this.email.focus(); }}
							testID='profile-view-username'
						/>
						<RCTextInput
							inputRef={(e) => { this.email = e; }}
							label={I18n.t('Email')}
							placeholder={I18n.t('Email')}
							value={email}
							onChangeText={value => this.setState({ email: value })}
							onSubmitEditing={() => { this.newPassword.focus(); }}
							testID='profile-view-email'
						/>
						<RCTextInput
							inputRef={(e) => { this.newPassword = e; }}
							label={I18n.t('New_Password')}
							placeholder={I18n.t('New_Password')}
							value={newPassword}
							onChangeText={value => this.setState({ newPassword: value })}
							onSubmitEditing={() => {
								if (Accounts_CustomFields && Object.keys(customFields).length) {
									return this[Object.keys(customFields)[0]].focus();
								}
								this.avatarUrl.focus();
							}}
							secureTextEntry
							testID='profile-view-new-password'
						/>
						{this.renderCustomFields()}
						<RCTextInput
							inputRef={(e) => { this.avatarUrl = e; }}
							label={I18n.t('Avatar_Url')}
							placeholder={I18n.t('Avatar_Url')}
							value={avatarUrl}
							onChangeText={value => this.setState({ avatarUrl: value })}
							onSubmitEditing={this.submit}
							testID='profile-view-avatar-url'
						/>
						{this.renderAvatarButtons()}
						<Button
							title={I18n.t('Save_Changes')}
							type='primary'
							onPress={this.submit}
							disabled={!this.formIsChanged()}
							testID='profile-view-submit'
							loading={saving}
						/>
						<Dialog.Container visible={showPasswordAlert}>
							<Dialog.Title>
								{I18n.t('Please_enter_your_password')}
							</Dialog.Title>
							<Dialog.Description>
								{I18n.t('For_your_security_you_must_enter_your_current_password_to_continue')}
							</Dialog.Description>
							<Dialog.Input
								onChangeText={value => this.setState({ currentPassword: value })}
								secureTextEntry
								testID='profile-view-typed-password'
								style={styles.dialogInput}
							/>
							<Dialog.Button label={I18n.t('Cancel')} onPress={this.closePasswordAlert} />
							<Dialog.Button label={I18n.t('Save')} onPress={this.submit} />
						</Dialog.Container>
					</SafeAreaView>
				</ScrollView>
			</KeyboardView>
		);
	}
}

const mapStateToProps = state => ({
	user: {
		id: state.login.user && state.login.user.id,
		name: state.login.user && state.login.user.name,
		username: state.login.user && state.login.user.username,
		customFields: state.login.user && state.login.user.customFields,
		emails: state.login.user && state.login.user.emails,
		token: state.login.user && state.login.user.token
	},
	Accounts_CustomFields: state.settings.Accounts_CustomFields,
	baseUrl: state.settings.Site_Url || state.server ? state.server.server : ''
});

const mapDispatchToProps = dispatch => ({
	setUser: params => dispatch(setUserAction(params))
});

export default connect(mapStateToProps, mapDispatchToProps)(ProfileView);