import React from 'react';
import PropTypes from 'prop-types';
import { View, ScrollView, Keyboard } from 'react-native';
import { connect } from 'react-redux';
import prompt from 'react-native-prompt-android';
import SHA256 from 'js-sha256';
import ImagePicker from 'react-native-image-crop-picker';
import RNPickerSelect from 'react-native-picker-select';
import equal from 'deep-equal';

import Touch from '../../utils/touch';
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 { setUser as setUserAction } from '../../actions/login';
import { CustomIcon } from '../../lib/Icons';
import { DrawerButton } from '../../containers/HeaderButton';
import StatusBar from '../../containers/StatusBar';
import { themes } from '../../constants/colors';
import { withTheme } from '../../theme';
import { getUserSelector } from '../../selectors/login';
import SafeAreaView from '../../containers/SafeAreaView';

class ProfileView extends React.Component {
	static navigationOptions = ({ navigation, isMasterDetail }) => {
		const options = {
			title: I18n.t('Profile')
		};
		if (!isMasterDetail) {
			options.headerLeft = () => <DrawerButton navigation={navigation} />;
		}
		return options;
	}

	static propTypes = {
		baseUrl: PropTypes.string,
		user: PropTypes.object,
		Accounts_AllowEmailChange: PropTypes.bool,
		Accounts_AllowPasswordChange: PropTypes.bool,
		Accounts_AllowRealNameChange: PropTypes.bool,
		Accounts_AllowUserAvatarChange: PropTypes.bool,
		Accounts_AllowUsernameChange: PropTypes.bool,
		Accounts_CustomFields: PropTypes.string,
		setUser: PropTypes.func,
		theme: PropTypes.string
	}

	state = {
		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);
		}
	}

	UNSAFE_componentWillReceiveProps(nextProps) {
		const { user } = this.props;
		if (!equal(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) => {
		const { Accounts_AllowUserAvatarChange } = this.props;

		if (!Accounts_AllowUserAvatarChange) {
			return;
		}

		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
		);
	}

	handleError = (e, func, action) => {
		if (e.data && e.data.error.includes('[error-too-many-requests]')) {
			return showErrorAlert(e.data.error);
		}
		showErrorAlert(I18n.t('There_was_an_error_while_action', { action: I18n.t(action) }));
	}

	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) {
			this.setState({ saving: false });
			prompt(
				I18n.t('Please_enter_your_password'),
				I18n.t('For_your_security_you_must_enter_your_current_password_to_continue'),
				[
					{ text: I18n.t('Cancel'), onPress: () => {}, style: 'cancel' },
					{
						text: I18n.t('Save'),
						onPress: (p) => {
							this.setState({ currentPassword: p });
							this.submit();
						}
					}
				],
				{
					type: 'secure-text',
					cancelable: false
				}
			);
			return;
		}

		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 });
				}
				EventEmitter.emit(LISTENER, { message: I18n.t('Profile_saved_successfully') });
				this.init();
			}
			this.setState({ saving: false });
		} catch (e) {
			this.setState({ saving: false, currentPassword: null });
			this.handleError(e, 'saveUserProfile', 'saving_profile');
		}
	}

	resetAvatar = async() => {
		const { Accounts_AllowUserAvatarChange } = this.props;

		if (!Accounts_AllowUserAvatarChange) {
			return;
		}

		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 { Accounts_AllowUserAvatarChange } = this.props;

		if (!Accounts_AllowUserAvatarChange) {
			return;
		}

		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
	}) => {
		const { theme } = this.props;
		return (
			<Touch
				key={key}
				testID={key}
				onPress={onPress}
				style={[styles.avatarButton, { opacity: disabled ? 0.5 : 1 }, { backgroundColor: themes[theme].borderColor }]}
				enabled={!disabled}
				theme={theme}
			>
				{child}
			</Touch>
		);
	}

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

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

	render() {
		const {
			name, username, email, newPassword, avatarUrl, customFields, avatar, saving
		} = this.state;
		const {
			baseUrl,
			user,
			theme,
			Accounts_AllowEmailChange,
			Accounts_AllowPasswordChange,
			Accounts_AllowRealNameChange,
			Accounts_AllowUserAvatarChange,
			Accounts_AllowUsernameChange,
			Accounts_CustomFields
		} = this.props;

		return (
			<KeyboardView
				style={{ backgroundColor: themes[theme].auxiliaryBackground }}
				contentContainerStyle={sharedStyles.container}
				keyboardVerticalOffset={128}
			>
				<StatusBar theme={theme} />
				<SafeAreaView testID='profile-view' theme={theme}>
					<ScrollView
						contentContainerStyle={sharedStyles.containerScrollView}
						testID='profile-view-list'
						{...scrollPersistTaps}
					>
						<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
							editable={Accounts_AllowRealNameChange}
							inputStyle={[
								!Accounts_AllowRealNameChange && styles.disabled
							]}
							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'
							theme={theme}
						/>
						<RCTextInput
							editable={Accounts_AllowUsernameChange}
							inputStyle={[
								!Accounts_AllowUsernameChange && styles.disabled
							]}
							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'
							theme={theme}
						/>
						<RCTextInput
							editable={Accounts_AllowEmailChange}
							inputStyle={[
								!Accounts_AllowEmailChange && styles.disabled
							]}
							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'
							theme={theme}
						/>
						<RCTextInput
							editable={Accounts_AllowPasswordChange}
							inputStyle={[
								!Accounts_AllowPasswordChange && styles.disabled
							]}
							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'
							theme={theme}
						/>
						{this.renderCustomFields()}
						<RCTextInput
							editable={Accounts_AllowUserAvatarChange}
							inputStyle={[
								!Accounts_AllowUserAvatarChange && styles.disabled
							]}
							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'
							theme={theme}
						/>
						{this.renderAvatarButtons()}
						<Button
							title={I18n.t('Save_Changes')}
							type='primary'
							onPress={this.submit}
							disabled={!this.formIsChanged()}
							testID='profile-view-submit'
							loading={saving}
							theme={theme}
						/>
					</ScrollView>
				</SafeAreaView>
			</KeyboardView>
		);
	}
}

const mapStateToProps = state => ({
	user: getUserSelector(state),
	Accounts_AllowEmailChange: state.settings.Accounts_AllowEmailChange,
	Accounts_AllowPasswordChange: state.settings.Accounts_AllowPasswordChange,
	Accounts_AllowRealNameChange: state.settings.Accounts_AllowRealNameChange,
	Accounts_AllowUserAvatarChange: state.settings.Accounts_AllowUserAvatarChange,
	Accounts_AllowUsernameChange: state.settings.Accounts_AllowUsernameChange,
	Accounts_CustomFields: state.settings.Accounts_CustomFields,
	baseUrl: state.server.server
});

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

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