{% extends "!layout.html" %}

{% set docsearch_version = '2' %}
{% set docsearch_base = 'https://cdn.jsdelivr.net/npm/docsearch.js@' ~ docsearch_version ~ '/dist/cdn/' %}

{% block extrahead %}
    <meta name="docsearch:version" content="{% if READTHEDOCS and current_version %}{{ current_version }}{% else %}unknown{% endif %}" />

    <link rel="stylesheet" href="{{ docsearch_base ~ 'docsearch.min.css' }}"/>
    <link rel="stylesheet" href="{{ pathto('_static/css/docsearch.overrides.css', 1) }}" />
    <link rel="stylesheet" href="{{ pathto('_static/css/pagination.css', 1) }}" />
    <link rel="stylesheet" href="{{ pathto('_static/css/custom.css', 1) }}" />
{% endblock %}

{% block search %}
    <script async defer data-domain="docs.wagtail.org" src="https://plausible.io/js/plausible.js"></script>
    <script src="{{ docsearch_base }}docsearch.min.js"></script>
    <script>
        /**
         * Get version of the currently served docs.
         *
         * PR builds have their version set to the PR ID (for example "6753").
         * If the docs are built for a PR or local development, use the "latest" facet filter.
         * Otherwise, use the facet filter for the current version.
         */
        function getReadTheDocsVersion() {
            const meta = document.querySelector('meta[name="docsearch:version"]');
            const rtd_version = meta ? meta.content : 'latest';
            const version = rtd_version.match(/^(\d+|unknown)$/) ? 'latest' : rtd_version;
            return version;
        }

        function getVersionFacetFilter() {
            return `version:${getReadTheDocsVersion()}`;
        }

        /**
         * Return true (debug: on) for local builds or Read the Docs PR previews.
         *
         * The debug mode allows inspection of the dropdown.
         */
        function getSearchDebugMode() {
            let debug = false
            if (window.READTHEDOCS_DATA === undefined) {
                // When developing locally, the `window.READTHEDOCS_DATA` object does not exist.
                debug = true
            } else {
                // When PR preview on Readthedocs, then the version can be converted into
                // a number. This does not work for the production version identifiers
                // like 'stable', 'latest', 'v2.12', etc. In that case `Number()` is `NaN`.
                const versionNumber = Number(window.READTHEDOCS_DATA.version)
                debug = !isNaN(versionNumber)
            }
            return debug
        }

        function docSearchReady() {
            /**
             * Configure Algolia DocSearch.
             * See https://github.com/wagtail/wagtail/wiki/Documentation-search for index configuration.
             */
            const search = docsearch({
                appId: 'XSYGEO7KMJ',
                apiKey: 'd50a485660ed9280079aada4e09454b2',
                indexName: 'wagtail',
                inputSelector: '#searchbox [name="q"]',
                algoliaOptions: {
                    facetFilters: [getVersionFacetFilter()],
                },
                autocompleteOptions: {
                    // Do NOT automatically select the first suggestion in the dropdown.
                    // https://github.com/algolia/autocomplete/blob/45fa32d008620cf52bf4a90530be338543dfba7f/README.md#global-options
                    autoSelect: false
                },
                debug: getSearchDebugMode(),
            })

            // Change page styles when the dropdown is open, to lock scrolling.
            search.autocomplete.on('autocomplete:updated', function (event) {
                const isOpen = event.target.value.trim() !== '';
                document.body.classList.toggle('body--autocomplete-open', isOpen);
            });
            search.autocomplete.on('autocomplete:closed', function (event) {
                document.body.classList.toggle('body--autocomplete-open', false);
            });
            return search
        }

        docSearchReady();
    </script>
{% endblock %}