// <nowiki>
mw.loader.using(['mediawiki.util', 'mediawiki.api'], function() {
    $(document).ready(function() {
        var config = mw.config.get([
            'wgArticleId',
            'wgNamespaceNumber',
            'wgPageName',
            'wgAction',
            'wgIsMainPage'
        ]);
        if (config.wgIsMainPage) {
            return;
        }

        if (config.wgNamespaceNumber == -1) {
            return;
        }

        function addRemoveSectionLinks() {
            $('.mw-editsection a').not('.mw-editsection-visualeditor').each(function() {
                var editSectionUrl = $(this).attr('href');
                var sectionReg = /&section=(\d+)/;
                var sectionRaw = sectionReg.exec(editSectionUrl);
                if (sectionRaw != null) {
                    var sectionNumber = parseInt(sectionRaw[1]);
                    var sectionTitle = $(this).closest('h2').text().trim();
                    var checkbox = $('<input>')
                        .attr('type', 'checkbox')
                        .attr('data-section', sectionNumber)
                        .attr('data-title', sectionTitle)
                        .css({
                            'margin-left': '10px',
                            'cursor': 'pointer',
                            'width': '17px',
                            'display': 'none',
                            'height': '17px'
                        })
                        .change(function() {
                            var headerElement = $(this).closest('h2');
                            if ($(this).is(':checked')) {
                                headerElement.css('background-color', 'yellow');
                            } else {
                                headerElement.css('background-color', '');
                            }
                        });
                    $(this).parent().append(checkbox);
                }
            });

            var removeButton = $('<button>')
                .text('Remove the selected sections')
                .attr('id', 'remove-selected-sections')
                .css({
                    'position': 'sticky',
                    'bottom': '7px',
                    'width': '100%',
                    'font-size': '150%',
                    'color': 'white',
                    'background-color': '#607593',
                    'border-radius': '5px',
                    'border-block-color': 'unset',
                    'border-block-start-color': 'unset',
                    'display': 'none'
                })
                .click(function(e) {
                    e.preventDefault();
                    var selectedSections = [];
                    $('input[type="checkbox"]:checked').each(function() {
                        selectedSections.push($(this).data('section'));
                    });

                    if (selectedSections.length === 0) {
                        alert('No sections are selected.');
                        return;
                    }

                    if (confirm('Are you sure you want to remove the selected sections?')) {
                        removeSections(selectedSections);
                    }
                });
            $(document.body).append(removeButton);
        }

        function removeSections(sectionNumbers) {
            var pageid = config.wgArticleId;
            var api = new mw.Api();
            var sectionContents = [];
            var initialRevId;

            function getSectionContent(index) {
                if (index >= sectionNumbers.length) {
                    api.get({
                        action: 'query',
                        prop: 'revisions',
                        pageids: pageid,
                        rvprop: 'content|ids',
                        indexpageids: 1
                    }).done(function(response) {
                        var pageContent = response.query.pages[pageid].revisions[0]['*'];
                        var initialRevId = response.query.pages[pageid].revisions[0].revid;
                        sectionContents.forEach(function(sectionContent) {
                            var sectionReg = new RegExp(sectionContent.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&') + '\n*', 'g');
                            pageContent = pageContent.replace(sectionReg, '');
                        });
                        api.postWithToken('csrf', {
                            action: 'edit',
                            pageid: pageid,
                            text: pageContent,
                            summary: 'Removed sections (using [[User:DreamRimmer/SectionRemover|SectionRemover.js]])'
                        }).done(function(postResponse) {
                            var newRevisionId = postResponse.edit.newrevid;
                            alert('Selected sections removed successfully.');
                            location.href = mw.util.getUrl(config.wgPageName) + '?diff=' + newRevisionId;
                        }).fail(function() {
                            alert('Failed to remove the selected sections.');
                        });
                    });
                    return;
                }

                var sectionNumber = sectionNumbers[index];
                api.get({
                    action: 'query',
                    prop: 'revisions',
                    pageids: pageid,
                    rvsection: sectionNumber,
                    rvprop: 'content',
                    indexpageids: 1
                }).done(function(response) {
                    var sectionContent = response.query.pages[pageid].revisions[0]['*'];
                    sectionContents.push(sectionContent);
                    getSectionContent(index + 1);
                });
            }

            getSectionContent(0);
        }

        if (config.wgAction === 'view' && !config.wgPageName.includes('History') && !config.wgPageName.includes('Contributions')) {
            mw.util.addPortletLink(
                'p-cactions',
                '#',
                'Remove sections',
                'ca-enable-section-removal',
                'Enable the ability to remove sections'
            );

            $('#ca-enable-section-removal').on('click', function (e) {
                e.preventDefault();
                $('input[type="checkbox"]').css('display', 'inline');
                $('#remove-selected-sections').css('display', 'block');
            });

            addRemoveSectionLinks();
        }
    });
});
// </nowiki>