import template from './templates/booleanGroupEditor.html';
import BaseCollectionEditorView from './base/BaseCollectionEditorView';
import formRepository from '../formRepository';
import BooleanEditorView from './BooleanEditorView';

const defaultOptions = {
    displayText: '',
    thirdState: false,
    items: []
};

/**
 * @name BooleanGroupEditorView
 * @memberof module:core.form.editors
 * @class A simple Checkbox editor. Supported data type: <code>Boolean</code>.
 * @extends module:core.form.editors.base.BaseEditorView
 * @param {Object} options Options object. All the properties of {@link module:core.form.editors.base.BaseEditorView BaseEditorView} class are also supported.
 * @param {String} [options.displayText] Text to the right of the checkbox. Click on text triggers the checkbox.
 * @param {String} [options.displayHtml] HTML content to the right of the checkbox. Click on it triggers the checkbox.
 * @param {String} [options.title] Title attribute for the editor.
 * @param {Boolean} [options.thirdState=false] Enables third state for checkbox.
 * */
export default formRepository.editors.BooleanGroup = BaseCollectionEditorView.extend({
    initialize(options = {}) {
        _.defaults(this.options, _.pick(options.schema ? options.schema : options, Object.keys(defaultOptions)), defaultOptions);

        this.collection = new Backbone.Collection(this.options.items);
    },

    childViewContainer: '.js-checkbox-group_conianer',

    childView: BooleanEditorView,

    className: 'editor',

    attributes() {
        return {
            title: this.options.title || null
        };
    },

    childViewOptions(model) {
        return Object.assign({}, model.toJSON(), { key: 'checkboxValue', autocommit: true });
    },

    template: Handlebars.compile(template),

    setValue(value) {
        this.value = value;
        Object.values(this.children._views).forEach(view => view.setValue(this.value ? this.value.includes(view.model.id) : false));
    },

    isEmptyValue() {
        return typeof this.getValue() !== 'boolean';
    },

    onRender() {
        Object.values(this.children._views).forEach(view => this.listenTo(view, 'change', booleanEditor => this.__value(booleanEditor.getValue(), view.id)));
    },

    __value(value, valueId) {
        if (value) {
            if (!this.value) {
                this.value = [];
            }
            this.value.push(valueId);
        } else {
            this.value.splice(this.value.findIndex(v => v === valueId), 1);
        }
        this.__triggerChange();
    },

    __setReadonly(readonly) {
        BaseCollectionEditorView.prototype.__setReadonly.call(this, readonly);
        if (this.getEnabled()) {
            this.$editorEl.prop('tabindex', readonly ? -1 : 0);
        }
        Object.values(this.children._views).forEach(view => view.__setReadonly(readonly));
    }
});