// (C) Copyright 2015 Moodle Pty Ltd.
//
// 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 { Injectable } from '@angular/core';
import { CoreContentLinksHandlerBase } from '@features/contentlinks/classes/base-handler';
import { CoreContentLinksAction } from '@features/contentlinks/services/contentlinks-delegate';
import { CoreCourse } from '@features/course/services/course';
import { CoreNavigator } from '@services/navigator';
import { CoreSitesReadingStrategy } from '@services/sites';
import { CoreDomUtils } from '@services/utils/dom';
import { makeSingleton } from '@singletons';
import { AddonModWiki } from '../wiki';
import { AddonModWikiModuleHandlerService } from './module';

/**
 * Handler to treat links to edit a wiki page.
 */
@Injectable({ providedIn: 'root' })
export class AddonModWikiEditLinkHandlerService extends CoreContentLinksHandlerBase {

    name = 'AddonModWikiEditLinkHandler';
    featureName = 'CoreCourseModuleDelegate_AddonModWiki';
    pattern = /\/mod\/wiki\/edit\.php.*([&?]pageid=\d+)/;

    /**
     * @inheritdoc
     */
    getActions(
        siteIds: string[],
        url: string,
        params: Record<string, string>,
    ): CoreContentLinksAction[] | Promise<CoreContentLinksAction[]> {

        return [{
            action: async (siteId: string) => {
                const modal = await CoreDomUtils.showModalLoading();

                try {
                    const pageId = Number(params.pageid);

                    const pageContents = await AddonModWiki.getPageContents(pageId, { siteId });

                    const module = await CoreCourse.getModuleBasicInfoByInstance(
                        pageContents.wikiid,
                        'wiki',
                        { siteId, readingStrategy: CoreSitesReadingStrategy.PREFER_CACHE },
                    );

                    let section = '';
                    if (params.section !== undefined) {
                        section = params.section.replace(/\+/g, ' ');
                    }

                    CoreNavigator.navigateToSitePath(
                        AddonModWikiModuleHandlerService.PAGE_NAME + `/${module.course}/${module.id}/edit`,
                        {
                            params: {
                                section: section,
                                pageId: pageId,
                            },
                            siteId,
                        },
                    );
                } catch (error) {
                    CoreDomUtils.showErrorModalDefault(error, 'addon.mod_wiki.errorloadingpage', true);
                } finally {
                    modal.dismiss();
                }
            },
        }];
    }

}

export const AddonModWikiEditLinkHandler = makeSingleton(AddonModWikiEditLinkHandlerService);