'use strict';

import classNames from 'classnames';
import Concept from '../Concept';
import Icon from '../../../Icon.jsx';
import ObserveModelMixin from '../../../ObserveModelMixin';
import React from 'react';
import createReactClass from 'create-react-class';
import PropTypes from 'prop-types';
import Styles from './summary-concept.scss';

/*
 * ActiveConcept takes a root concept and a single parent's active leaf nodes,
 * and displays a single panel which either:
 * a) lists only the active child nodes (if the parent is closed), or
 * b) shows a more traditional list of checkboxes with concept names (if parent is open).
 * It has a header with the parent name, and edit & remove controls.
 * When it is clicked, parent.isOpen is set to True.
 * (The condition can only be "removed" if rootConcept.allowMultiple is true.)
 */
const ActiveConcept = createReactClass({
    displayName: 'ActiveConcept',
    mixins: [ObserveModelMixin],

    propTypes: {
        activeLeafNodesWithParent: PropTypes.object.isRequired,
        rootConcept: PropTypes.object.isRequired,
        isLoading: PropTypes.bool
    },

    open() {
        // Close all others.
        this.props.rootConcept.closeDescendants();
        // And open this one's parent.
        this.props.activeLeafNodesWithParent.parent.isOpen = true;
    },

    close(event) {
        event.stopPropagation();
        this.props.activeLeafNodesWithParent.parent.isOpen = false;
    },

    remove(event) {
        event.stopPropagation();
        const activeLeafNodesWithParent = this.props.activeLeafNodesWithParent;
        // The parent must be a DisplayVariablesConcept or subclass, so it has a toggleActiveItem method.
        // This method de-activates all items other than the one passed in. We pass null here, so it deactivates all its items.
        // TODO: this triggers a change in active items - and hence a load - for each one. Urg!
        activeLeafNodesWithParent.parent.toggleActiveItem(null);
    },

    render() {
        const activeLeafNodesWithParent = this.props.activeLeafNodesWithParent;
        return (
            <div className={Styles.section}>
                <div className={classNames({[Styles.btnOpen]: !activeLeafNodesWithParent.parent.isOpen, [Styles.isLoading]: this.props.isLoading})} onClick={this.open}>
                    <div className={Styles.controls}>
                        <If condition={!activeLeafNodesWithParent.parent.isOpen}>
                            <button className={Styles.btnEdit} title='Edit condition'>
                                <Icon glyph={Icon.GLYPHS.settings}/>
                            </button>
                            <If condition={this.props.rootConcept.allowMultiple}>
                                <button className={Styles.btnRemove} onClick={this.remove} title='Remove condition'>
                                    <Icon glyph={Icon.GLYPHS.close}/>
                                </button>
                            </If>
                        </If>
                        <If condition={activeLeafNodesWithParent.parent.isOpen}>
                            <button className={Styles.btnClose} onClick={this.close}>
                                Close
                            </button>
                        </If>
                    </div>
                    <div className={Styles.heading}>
                        {activeLeafNodesWithParent.parent.name}
                    </div>
                    <If condition={!activeLeafNodesWithParent.parent.isOpen}>
                        <For each="child" index="j" of={activeLeafNodesWithParent.children}>
                            <div className={Styles.condition} key={j}>
                                {child.name}
                            </div>
                        </For>
                    </If>
                    <If condition={activeLeafNodesWithParent.parent.isOpen}>
                        <ul className={Styles.childrenList}>
                            <Concept hideName={true} concept={activeLeafNodesWithParent.parent} isLoading={this.props.isLoading}/>
                        </ul>
                    </If>
                </div>
            </div>
        );
    },
});

module.exports = ActiveConcept;