/*****************************************************************************
 * Open MCT, Copyright (c) 2014-2022, United States Government
 * as represented by the Administrator of the National Aeronautics and Space
 * Administration. All rights reserved.
 *
 * Open MCT is 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.
 *
 * Open MCT includes source code licensed under additional open source
 * licenses. See the Open Source Licenses file (LICENSES.md) included with
 * this source code distribution or the Licensing information page available
 * at runtime from the About dialog for additional information.
 *****************************************************************************/

import stylesManager from './StylesManager';
import StylesInspectorView from './StylesInspectorView.vue';
import Vue from 'vue';

const NON_STYLABLE_TYPES = ['folder', 'webPage', 'conditionSet', 'summary-widget', 'hyperlink'];

function isLayoutObject(selection, objectType) {
    //we allow conditionSets to be styled if they're part of a layout
    return selection.length > 1
        && ((objectType === 'conditionSet') || (NON_STYLABLE_TYPES.indexOf(objectType) < 0));
}

function isCreatableObject(object, type) {
    return (NON_STYLABLE_TYPES.indexOf(object.type) < 0) && type.definition.creatable;
}

export default function StylesInspectorViewProvider(openmct) {
    return {
        key: 'stylesInspectorView',
        name: 'Styles',
        glyph: 'icon-paint-bucket',
        canView: function (selection) {
            const objectSelection = selection?.[0];
            const layoutItem = objectSelection?.[0]?.context?.layoutItem;
            const domainObject = objectSelection?.[0]?.context?.item;

            if (layoutItem) {
                return true;
            }

            if (!domainObject) {
                return false;
            }

            const type = openmct.types.get(domainObject.type);

            return isLayoutObject(objectSelection, domainObject.type) || isCreatableObject(domainObject, type);
        },
        view: function (selection) {
            let component;

            return {
                show: function (el) {
                    component = new Vue({
                        el,
                        components: {
                            StylesInspectorView
                        },
                        provide: {
                            openmct,
                            stylesManager,
                            selection
                        },
                        template: `<StylesInspectorView />`
                    });
                },
                priority: function () {
                    return openmct.priority.DEFAULT;
                },
                destroy: function () {
                    component.$destroy();
                    component = undefined;
                }
            };
        }
    };
}