import React from 'react';
import PropTypes from 'prop-types';
import { View, ScrollView, SafeAreaView, Keyboard } from 'react-native';
import { connect } from 'react-redux';
import Dialog from 'react-native-dialog';
import SHA256 from 'js-sha256';
import Icon from 'react-native-vector-icons/MaterialIcons';
import ImagePicker from 'react-native-image-picker';
import RNPickerSelect from 'react-native-picker-select';

import LoggedView from '../View';
import KeyboardView from '../../presentation/KeyboardView';
import sharedStyles from '../Styles';
import styles from './styles';
import scrollPersistTaps from '../../utils/scrollPersistTaps';
import { showErrorAlert, showToast } from '../../utils/info';
import RocketChat from '../../lib/rocketchat';
import RCTextInput from '../../containers/TextInput';
import Loading from '../../containers/Loading';
import log from '../../utils/log';
import I18n from '../../i18n';
import Button from '../../containers/Button';
import Avatar from '../../containers/Avatar';
import Touch from '../../utils/touch';

@connect(state => ({
	user: state.login.user,
	Accounts_CustomFields: state.settings.Accounts_CustomFields
}))
export default class ProfileView extends LoggedView {
	static propTypes = {
		navigation: PropTypes.object,
		user: PropTypes.object,
		Accounts_CustomFields: PropTypes.string
	};

	constructor(props) {
		super('ProfileView', props);
		this.state = {
			showPasswordAlert: false,
			saving: false,
			name: null,
			username: null,
			email: null,
			newPassword: null,
			typedPassword: null,
			avatarUrl: null,
			avatar: {},
			avatarSuggestions: {},
			customFields: {}
		};
	}

	async componentDidMount() {
		this.init();

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

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

	init = (user) => {
		const {
			name, username, emails, customFields
		} = user || this.props.user;
		this.setState({
			name,
			username,
			email: emails ? emails[0].address : null,
			newPassword: null,
			typedPassword: 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[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 && e.error && e.error !== 500) {
			if (e.details && e.details.timeToReset) {
				return showErrorAlert(I18n.t('error-too-many-requests', {
					seconds: parseInt(e.details.timeToReset / 1000, 10)
				}));
			}
			return showErrorAlert(I18n.t(e.error, e.details));
		}
		showErrorAlert(I18n.t('There_was_an_error_while_action', { action: I18n.t(action) }));
		log(func, e);
	}

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

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

		this.setState({ saving: true, showPasswordAlert: false });

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

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

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

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

		try {
			if (avatar.url) {
				try {
					await RocketChat.setAvatarFromService(avatar);
				} catch (e) {
					this.setState({ saving: false, typedPassword: null });
					return setTimeout(() => this.handleError(e, 'setAvatarFromService', 'changing_avatar'), 300);
				}
			}

			await RocketChat.saveUserProfile(params, customFields);
			this.setState({ saving: false });
			setTimeout(() => {
				showToast(I18n.t('Profile_saved_successfully'));
				this.init();
			}, 300);
		} catch (e) {
			this.setState({ saving: false, typedPassword: null });
			setTimeout(() => {
				this.handleError(e, 'saveUserProfile', 'saving_profile');
			}, 300);
		}
	}

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

	resetAvatar = async() => {
		try {
			await RocketChat.resetAvatar();
			showToast(I18n.t('Avatar_changed_successfully'));
			this.init();
		} catch (e) {
			this.handleError(e, 'resetAvatar', 'changing_avatar');
		}
	}

	pickImage = () => {
		const options = {
			title: I18n.t('Select_Avatar')
		};
		ImagePicker.showImagePicker(options, async(response) => {
			if (response.didCancel) {
				console.warn('User cancelled image picker');
			} else if (response.error) {
				log('ImagePicker Error', response.error);
			} else {
				this.setAvatar({ url: response.uri, data: `data:image/jpeg;base64,${ response.data }`, service: 'upload' });
			}
		});
	}

	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 = () => (
		<View style={styles.avatarButtons}>
			{this.renderAvatarButton({
				child: <Avatar text={this.props.user.username} size={50} forceInitials />,
				onPress: () => this.resetAvatar(),
				key: 'profile-view-reset-avatar'
			})}
			{this.renderAvatarButton({
				child: <Icon name='file-upload' size={30} />,
				onPress: () => this.pickImage(),
				key: 'profile-view-upload-avatar'
			})}
			{this.renderAvatarButton({
				child: <Icon name='link' size={30} />,
				onPress: () => this.setAvatar({ url: this.state.avatarUrl, data: this.state.avatarUrl, service: 'url' }),
				disabled: !this.state.avatarUrl,
				key: 'profile-view-avatar-url-button'
			})}
			{Object.keys(this.state.avatarSuggestions).map((service) => {
				const { url, blob, contentType } = this.state.avatarSuggestions[service];
				return this.renderAvatarButton({
					key: `profile-view-avatar-${ service }`,
					child: <Avatar avatar={url} size={50} />,
					onPress: () => this.setAvatar({
						url, data: blob, service, contentType
					})
				});
			})}
		</View>
	);

	renderCustomFields = () => {
		const { customFields } = this.state;
		if (!this.props.Accounts_CustomFields) {
			return null;
		}
		const parsedCustomFields = JSON.parse(this.props.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: { ...this.state.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: { ...this.state.customFields, ...newValue } });
					}}
					onSubmitEditing={() => {
						if (array.length - 1 > index) {
							return this[array[index + 1]].focus();
						}
						this.avatarUrl.focus();
					}}
				/>
			);
		});
	}

	render() {
		const {
			name, username, email, newPassword, avatarUrl, customFields
		} = this.state;
		return (
			<KeyboardView
				contentContainerStyle={sharedStyles.container}
				keyboardVerticalOffset={128}
			>
				<ScrollView
					contentContainerStyle={sharedStyles.containerScrollView}
					testID='profile-view-list'
					{...scrollPersistTaps}
				>
					<SafeAreaView testID='profile-view'>
						<View style={styles.avatarContainer} testID='profile-view-avatar'>
							<Avatar
								text={username}
								avatar={this.state.avatar && this.state.avatar.url}
								size={100}
							/>
						</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 (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()}
						<View style={sharedStyles.alignItemsFlexStart}>
							<Button
								title={I18n.t('Save_Changes')}
								type='primary'
								onPress={this.submit}
								disabled={!this.formIsChanged()}
								testID='profile-view-submit'
							/>
						</View>
						<Loading visible={this.state.saving} />
						<Dialog.Container visible={this.state.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({ typedPassword: 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>
		);
	}
}