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import { override } from '@microsoft/decorators';
import { Log } from '@microsoft/sp-core-library';
import { BaseApplicationCustomizer, PlaceholderName } from '@microsoft/sp-application-base';
import * as strings from 'MegaMenuApplicationCustomizerStrings';
import { TaxonomyNavigationService } from '../../services/TaxonomyNavigationService';
import { MegaMenuRenderer } from './MegaMenuRenderer';
// Import SCSS module
import './MegaMenu.module.scss';
var LOG_SOURCE = 'MegaMenuApplicationCustomizer';
export var UserCustomActionMegaMenuId = 'abc3361f-bb2d-491f-aba3-cd51c19a299b';
/** A Custom Action which can be run during execution of a Client Side Application */
var MegaMenuApplicationCustomizer = (function (_super) {
    __extends(MegaMenuApplicationCustomizer, _super);
    function MegaMenuApplicationCustomizer() {
        var _this = _super !== null && _super.apply(this, arguments) || this;
        _this._updateCallback = function (data) {
            _this._loadExternalCss(data.cssUrl);
            _this._renderMegaMenu(data.termSetName);
        };
        return _this;
    }
    MegaMenuApplicationCustomizer.prototype.onInit = function () {
        Log.info(LOG_SOURCE, "Initialized " + strings.Title);
        // Load external CSS if provided
        if (this.properties.cssUrl) {
            this._loadExternalCss(this.properties.cssUrl);
        }
        // Wait for the page to be ready
        this.context.placeholderProvider.changedEvent.add(this, this._renderPlaceHolders);
        // Initial render
        this._renderPlaceHolders();
        return Promise.resolve();
    };
    MegaMenuApplicationCustomizer.prototype._renderPlaceHolders = function () {
        console.log('Available placeholders: ', this.context.placeholderProvider.placeholderNames.map(function (name) { return PlaceholderName[name]; }).join(', '));
        // Handling the top placeholder
        if (!this._topPlaceholder) {
            this._topPlaceholder = this.context.placeholderProvider.tryCreateContent(PlaceholderName.Top, { onDispose: this._onDispose });
            // The extension should not assume that the expected placeholder is available.
            if (!this._topPlaceholder) {
                console.error('The expected placeholder (Top) was not found.');
                return;
            }
            if (!this.properties.termSetName) {
                console.error('TermSetName property is required but not provided.');
                1;
                return;
            }
            this._renderMegaMenu(this.properties.termSetName);
        }
    };
    MegaMenuApplicationCustomizer.prototype._renderMegaMenu = function (termSetName) {
        return __awaiter(this, void 0, void 0, function () {
            var taxonomyService, menuItems, renderer, container, error_1;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        if (!this._topPlaceholder) {
                            return [2 /*return*/];
                        }
                        _a.label = 1;
                    case 1:
                        _a.trys.push([1, 3, , 4]);
                        taxonomyService = new TaxonomyNavigationService(this.context, termSetName);
                        return [4 /*yield*/, taxonomyService.getMenuItems()];
                    case 2:
                        menuItems = _a.sent();
                        renderer = new MegaMenuRenderer(this.context, menuItems, this._updateCallback);
                        container = this._getOrCreateContainer('CustomHeader', this._topPlaceholder);
                        if (container) {
                            renderer.render(container);
                        }
                        else {
                            renderer.render(this._topPlaceholder.domElement);
                        }
                        Log.info(LOG_SOURCE, "MegaMenu rendered successfully with " + menuItems.length + " top-level items");
                        return [3 /*break*/, 4];
                    case 3:
                        error_1 = _a.sent();
                        console.error('Error rendering MegaMenu:', error_1);
                        return [3 /*break*/, 4];
                    case 4: return [2 /*return*/];
                }
            });
        });
    };
    MegaMenuApplicationCustomizer.prototype._getOrCreateContainer = function (id, placeholder) {
        var container = document.getElementById(id);
        if (container) {
            var div = document.createElement('div');
            container.appendChild(div);
            return div;
        }
        else {
            return placeholder.domElement;
        }
    };
    MegaMenuApplicationCustomizer.prototype._loadExternalCss = function (cssUrl) {
        var externalCssLinkId = 'mega-menu-additional-css-34FAB720';
        var link = document.getElementById(externalCssLinkId);
        if (cssUrl && cssUrl.trim() !== '') {
            // update previous link, if present
            if (!link) {
                var head = document.getElementsByTagName('head')[0];
                link = document.createElement('link');
                link.rel = 'stylesheet';
                link.type = 'text/css';
                link.id = externalCssLinkId;
                link.onload = function () {
                    Log.info(LOG_SOURCE, "External CSS loaded successfully from: " + cssUrl);
                };
                link.onerror = function () {
                    console.warn("Failed to load external CSS from: " + cssUrl);
                };
                head.appendChild(link);
            }
            link.href = cssUrl;
        }
        else if (link) {
            link.remove();
        }
    };
    MegaMenuApplicationCustomizer.prototype._onDispose = function () {
        console.log('[MegaMenuApplicationCustomizer._onDispose] Disposed custom top placeholder.');
    };
    __decorate([
        override
    ], MegaMenuApplicationCustomizer.prototype, "onInit", null);
    return MegaMenuApplicationCustomizer;
}(BaseApplicationCustomizer));
export default MegaMenuApplicationCustomizer;

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