// - Import react components
import React, { Component } from 'react'
import { connect } from 'react-redux'
import PropTypes from 'prop-types'
import {push} from 'react-router-redux'
import Paper from 'material-ui/Paper'
import FlatButton from 'material-ui/FlatButton'
import RaisedButton from 'material-ui/RaisedButton';
import Popover, { PopoverAnimationVertical } from 'material-ui/Popover';
import Menu from 'material-ui/Menu';
import MenuItem from 'material-ui/MenuItem'
import Checkbox from 'material-ui/Checkbox'
import TextField from 'material-ui/TextField'

// - Import app components
import UserAvatar from 'UserAvatar'


// - Import API
import CircleAPI from 'CircleAPI'


// - Import actions
import * as circleActions from 'circleActions'

/**
* Create component class
 */
export class UserBox extends Component {

    static propTypes = {
        /**
         * User identifier
         */
        userId: PropTypes.string,
        /**
         * User information
         */
        user:PropTypes.object

    }

    /**
     * Component constructor
     * @param  {object} props is an object properties of component
     */
    constructor(props) {
        super(props)

        //Defaul state
        this.state = {
            /**
             * It will be true if user follow popover is open
             */
            open: false,
            /**
             * The value of circle input
             */
            circleName: '',
            /**
             * It will be true if the text field for adding group is empty
             */
            disabledAddCircle: true
        }

        // Binding functions to `this`
        this.handleChangeName = this.handleChangeName.bind(this)
        this.handleCreateCricle = this.handleCreateCricle.bind(this)
        this.handleFollowUser = this.handleFollowUser.bind(this)

    }

    handleFollowUser = (checked,cid) => {
        const {userId,user} = this.props
        const {avatar,fullName} = user
        if (checked) {
            this.props.addFollowingUser(cid,{avatar,userId,fullName})
        } else {
            this.props.deleteFollowingUser(cid,userId)
        }
    }

    /**
     * Handle create circle
     * 
     * 
     * @memberof UserBox
     */
    handleCreateCricle = () => {
        const {circleName} = this.state
        if(circleName && circleName.trim() !== '' ){
        this.props.createCircle(this.state.circleName)
        this.setState({
            circleName: '',
            disabledAddCircle: true
        })}
    }

    /**
     * Handle change group name input to the state
     * 
     * 
     * @memberof UserBox
     */
    handleChangeName = (evt) => {
        this.setState({
            circleName: evt.target.value,
            disabledAddCircle: (evt.target.value === undefined || evt.target.value.trim() === '')

        })
    }

    /**
     * Handle touch tab on follow popover
     * 
     * 
     * @memberof UserBox
     */
    handleTouchTap = (evt) => {
        // This prevents ghost click.
        event.preventDefault();

        this.setState({
            open: true,
            anchorEl: evt.currentTarget,
        })
    }

    /**
     * Handle close follow popover
     * 
     * 
     * @memberof UserBox
     */
    handleRequestClose = () => {
        this.setState({
            open: false,
        })
    }

    circleList = () => {
        let { circles, userId, userBelongCircles } = this.props

        if (circles) {
        
            return Object.keys(circles).map((key, index) => {
                if(key.trim() !== '-Followers'){
               let isBelong = userBelongCircles.indexOf(key) > -1 
          
                return <Checkbox
                    key={key}
                    style={{ padding: '10px' }}
                    label={circles[key].name}
                    labelStyle={{
                        overflow: 'hidden',
                        textOverflow: 'ellipsis',
                        whiteSpace: 'nowrap',
                        width: '100%'
                    }}
                    onCheck={(evt,checked) => this.handleFollowUser(checked,key)}
                    checked={isBelong}
                />}
            })
        }
    }

    /**
     * Reneder component DOM
     * @return {react element} return the DOM which rendered by component
     */
    render() {

        const styles = {
            paper: {
                height: 254,
                width: 243,
                margin: 10,
                textAlign: 'center',
                maxWidth: '257px'
            },
            followButton: {
                position: 'absolute',
                bottom: '8px',
                left: 0,
                right: 0
            }
        }

        return (
            <Paper style={styles.paper} zDepth={1} className='grid-cell'>
                <div style={{
                    display: 'flex',
                    flexDirection: 'column',
                    alignItems: 'center',
                    justifyContent: 'flex-start',
                    height: '100%',
                    position: 'relative',
                    padding: '30px'

                }}>
                    <div onClick={() => this.props.goTo(`/${this.props.userId}`)} style={{cursor:'pointer'}}>
                        <UserAvatar
                            fileName={this.props.avatar}
                            size={90}
                        />
                    </div>
                    <div onClick={() => this.props.goTo(`/${this.props.userId}`)} className='people__name' style={{cursor:'pointer'}}>
                        <div>
                            {this.props.user.fullName}
                            </div>
                    </div>
                    <div style={styles.followButton}>
                        <FlatButton 
                        label={(this.props.belongCirclesCount && this.props.belongCirclesCount < 1) ? 'Follow' 
                        : (this.props.belongCirclesCount > 1 ? `${this.props.belongCirclesCount} Circles` : ((this.props.firstBelongCircle) ? this.props.firstBelongCircle.name : 'Follow'))} 
                        primary={true} 
                        onTouchTap={this.handleTouchTap}
                         />
                    </div>
                </div>
                <Popover
                    open={this.state.open}
                    anchorEl={this.state.anchorEl}
                    anchorOrigin={{ horizontal: 'left', vertical: 'bottom' }}
                    targetOrigin={{ horizontal: 'left', vertical: 'top' }}
                    onRequestClose={this.handleRequestClose}
                    animation={PopoverAnimationVertical}
                >
                    <Menu >
                        <div style={{
                            position: 'relative',
                            display: 'block',
                            maxHeight: '220px'
                        }}>
                            <div style={{ overflowY: 'auto', height: '100%' }}>
                                {this.circleList()}

                            </div>
                        </div>
                        <div style={{ padding: '10px' }}>
                            <TextField
                                hintText="Group name"
                                onChange={this.handleChangeName}
                                value={this.state.circleName}
                            /><br />
                            <FlatButton label="ADD" primary={true} disabled={this.state.disabledAddCircle} onClick={this.handleCreateCricle} />
                        </div>
                    </Menu>
                </Popover>
            </Paper>
        )
    }
}


/**
 * Map dispatch to props
 * @param  {func} dispatch is the function to dispatch action to reducers
 * @param  {object} ownProps is the props belong to component
 * @return {object}          props of component
 */
const mapDispatchToProps = (dispatch, ownProps) => {
    return {
        createCircle: (name) => dispatch(circleActions.dbAddCircle(name)),
        addFollowingUser: (cid,user) => dispatch(circleActions.dbAddFollowingUser(cid,user)),
        deleteFollowingUser: (cid,followingId) => dispatch(circleActions.dbDeleteFollowingUser(cid,followingId)),
        goTo: (url)=> dispatch(push(url))

    }
}

/**
 * Map state to props
 * @param  {object} state is the obeject from redux store
 * @param  {object} ownProps is the props belong to component
 * @return {object}          props of component
 */
const mapStateToProps = (state, ownProps) => {
    const { uid } = state.authorize
    const circles =  state.circle ? (state.circle.userCircles[uid]|| {}) : {}
    const userBelongCircles = CircleAPI.getUserBelongCircles(circles,ownProps.userId)

    return {
        circles: circles,
        userBelongCircles: userBelongCircles || [],
        belongCirclesCount: userBelongCircles.length || 0,
        firstBelongCircle: userBelongCircles ? (circles ? circles[userBelongCircles[0]] : {}) : {},
        avatar: state.user.info && state.user.info[ownProps.userId] ? state.user.info[ownProps.userId].avatar || '' : ''
    }
}

// - Connect component to redux store
export default connect(mapStateToProps, mapDispatchToProps)(UserBox)