/*
 * Copyright © 2016-2018 European Support Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import React from 'react';
import PropTypes from 'prop-types';
import SVGIcon from 'onap-ui-react/lib/components/SVGIcon.js';
import Input from 'nfvo-components/input/validation/Input.jsx';

class DualListboxView extends React.Component {
    constructor(props) {
        super(props);
        this.availableListRef = React.createRef();
        this.availableListFilterRef = React.createRef();
        this.selectedValuesListFilterRef = React.createRef();
        this.selectedValuesRef = React.createRef();
    }
    static propTypes = {
        availableList: PropTypes.arrayOf(
            PropTypes.shape({
                id: PropTypes.string.isRequired,
                name: PropTypes.string.isRequired
            })
        ),
        filterTitle: PropTypes.shape({
            left: PropTypes.string,
            right: PropTypes.string
        }),
        selectedValuesList: PropTypes.arrayOf(PropTypes.string),

        onChange: PropTypes.func.isRequired
    };

    static defaultProps = {
        selectedValuesList: [],
        availableList: [],
        filterTitle: {
            left: '',
            right: ''
        }
    };

    state = {
        availableListFilter: '',
        selectedValuesListFilter: '',
        selectedValues: []
    };

    render() {
        let {
            availableList,
            selectedValuesList,
            filterTitle,
            isReadOnlyMode
        } = this.props;

        let { availableListFilter, selectedValuesListFilter } = this.state;

        let unselectedList = availableList.filter(
            availableItem =>
                !selectedValuesList.find(value => value === availableItem.id)
        );
        let selectedList = availableList.filter(availableItem =>
            selectedValuesList.find(value => value === availableItem.id)
        );
        selectedList = selectedList.sort(
            (a, b) => availableList.indexOf(a.id) - availableList.indexOf(b.id)
        );
        return (
            <div className="dual-list-box">
                {this.renderListbox(
                    filterTitle.left,
                    unselectedList,
                    {
                        value: availableListFilter,
                        ref: this.availableListFilterRef,
                        disabled: isReadOnlyMode,
                        onChange: value =>
                            this.setState({ availableListFilter: value })
                    },
                    {
                        ref: this.availableListRef,
                        disabled: isReadOnlyMode,
                        testId: 'available'
                    }
                )}
                {this.renderOperationsBar(isReadOnlyMode)}
                {this.renderListbox(
                    filterTitle.right,
                    selectedList,
                    {
                        value: selectedValuesListFilter,
                        ref: this.selectedValuesListFilterRef,
                        disabled: isReadOnlyMode,
                        onChange: value =>
                            this.setState({ selectedValuesListFilter: value })
                    },
                    {
                        ref: this.selectedValuesRef,
                        disabled: isReadOnlyMode,
                        testId: 'selected'
                    }
                )}
            </div>
        );
    }

    renderListbox(filterTitle, list, filterProps, props) {
        let regExFilter = new RegExp(escape(filterProps.value), 'i');
        let matchedItems = list.filter(item => item.name.match(regExFilter));
        let unMatchedItems = list.filter(item => !item.name.match(regExFilter));
        return (
            <div className="dual-search-multi-select-section">
                <p>{filterTitle}</p>
                <div className="dual-text-box-search search-wrapper">
                    <Input
                        data-test-id={`${props.testId}-search-input`}
                        name="search-input-control"
                        type="text"
                        groupClassName="search-input-control"
                        {...filterProps}
                    />
                    <SVGIcon name="search" className="search-icon" />
                </div>
                <Input
                    multiple
                    onChange={event =>
                        this.onSelectItems(event.target.selectedOptions)
                    }
                    groupClassName="dual-list-box-multi-select"
                    type="select"
                    name="dual-list-box-multi-select"
                    data-test-id={`${props.testId}-select-input`}
                    disabled={props.disabled}
                    ref={props.ref}>
                    {matchedItems.map(item =>
                        this.renderOption(item.id, item.name)
                    )}
                    {matchedItems.length &&
                        unMatchedItems.length && (
                            <option style={{ pointerEvents: 'none' }}>
                                --------------------
                            </option>
                        )}
                    {unMatchedItems.map(item =>
                        this.renderOption(item.id, item.name)
                    )}
                </Input>
            </div>
        );
    }

    onSelectItems(selectedOptions) {
        let selectedValues = Object.keys(selectedOptions).map(
            k => selectedOptions[k].value
        );
        this.setState({ selectedValues });
    }

    renderOption(value, name) {
        return (
            <option
                className="dual-list-box-multi-select-text"
                key={value}
                value={value}>
                {name}
            </option>
        );
    }

    renderOperationsBar(isReadOnlyMode) {
        return (
            <div
                className={`dual-list-options-bar${
                    isReadOnlyMode ? ' disabled' : ''
                }`}>
                {this.renderOperationBarButton(
                    () => this.addToSelectedList(),
                    'angleRight'
                )}
                {this.renderOperationBarButton(
                    () => this.removeFromSelectedList(),
                    'angleLeft'
                )}
                {this.renderOperationBarButton(
                    () => this.addAllToSelectedList(),
                    'angleDoubleRight'
                )}
                {this.renderOperationBarButton(
                    () => this.removeAllFromSelectedList(),
                    'angleDoubleLeft'
                )}
            </div>
        );
    }

    renderOperationBarButton(onClick, iconName) {
        return (
            <div
                className="dual-list-option"
                data-test-id={`operation-icon-${iconName}`}
                onClick={onClick}>
                <SVGIcon name={iconName} />
            </div>
        );
    }

    addToSelectedList() {
        this.props.onChange(
            this.props.selectedValuesList.concat(this.state.selectedValues)
        );
        this.setState({ selectedValues: [] });
    }

    removeFromSelectedList() {
        const selectedValues = this.state.selectedValues;
        this.props.onChange(
            this.props.selectedValuesList.filter(
                value =>
                    !selectedValues.find(
                        selectedValue => selectedValue === value
                    )
            )
        );
        this.setState({ selectedValues: [] });
    }

    addAllToSelectedList() {
        this.props.onChange(this.props.availableList.map(item => item.id));
    }

    removeAllFromSelectedList() {
        this.props.onChange([]);
    }

    // fix for auto-selection of first value in the list on the first render
    componentDidMount() {
        this.availableListRef.current.input.value = '';
        this.selectedValuesRef.current.input.value = '';
    }
}

export default DualListboxView;