function textToSlug(text) {
    return text.toString().toLowerCase()
        .normalize('NFD').replace(/[\u0300-\u036f]/g, '')
        .replace(/\s+/g, '-')
        .replace(/[^\w\-]+/g, '')
        .replace(/\-\-+/g, '-')
        .replace(/^-+/, '')
        .replace(/-+$/, '');
}

let selectFields = {};

$(function () {
    $.get(urlBase + "/types/" + textToSlug(type) + "/fields").done(function (response) {

        let allField = response["fields"];

        allField.forEach(function (field) {
            if (field.type == "select") selectFields[field.name] = field.attr.tags;
        });

        filterFields.forEach(function (item) {

            let filterTemplate = $('#filter');
            let filterElement = $(filterTemplate.clone().html());
            filterElement.find('.filter-name').text(item);

            let options = selectFields[item];

            options.forEach(function (option) {
                let filterOption = `
                <li>
                    <label onclick="event.stopPropagation()">
                        <input class="check-filter me-1" data-field="${item}" type="checkbox" name="filter-options" value="${option}">${option}
                    </label>
                </li>`;
                filterElement.find('.filter-options').append(filterOption);
            });

            $('#filters').append(filterElement);

            let appliedFilterTemplate = $('#applied-filter');
            let appliedFilterElement = $(appliedFilterTemplate.clone().html());
            appliedFilterElement.find('.filter-name').text(item);
            appliedFilterElement.attr('data-field', item);
            $('#applied-filters').append(appliedFilterElement);

        });
    });
});

function initMap() {
    function createInfowindowElement(item) {
        let infowindowElement = $("#marker-window").clone();
        infowindowElement.html(infowindowElement.html().replace('$title', item.title));
        infowindowElement.html(infowindowElement.html().replace('$description', item.description ?? ''));
        infowindowElement.html(infowindowElement.html().replace('data-href="$path"', 'href="' + item.path + '"'));
        infowindowElement.removeClass('d-none');
        return infowindowElement[0].outerHTML;
    }

    let map = new google.maps.Map(document.getElementById("map"), {
        streetViewControl: false,
        mapTypeControl: false,
        fullscreenControl: false,
    });

    let currentItems = [];

    $.get(urlBase + "/types/" + textToSlug(type) + "/contents").done(function (contents) {
        let items = contents["contents"];
        if (items != undefined) {
            locationItems = items.filter(function (item) { return item[textToSlug(locationField)].lat !== '' && item[textToSlug(locationField)].lng !== '' });
            currentItems = locationItems;
            loadCurrentItems();
        }
    });

    let markerCluster;

    function loadCurrentItems() {
        applyFilters();

        $("#count-items-displayed").text(currentItems.length);
        if (markerCluster != undefined) markerCluster.clearMarkers();
        if (currentItems.length > 0) {
            let openInfoWindow = null;

            currentItems = currentItems.map(function (item) {
                if (item.location == undefined) item.location = {};
                item.location.lat = parseFloat(item[textToSlug(locationField)].lat);
                item.location.lng = parseFloat(item[textToSlug(locationField)].lng);
                let marker = new google.maps.Marker({
                    position: { lat: item.location.lat, lng: item.location.lng },
                    map: map,
                    title: item.title,
                    optimized: false,
                });
                let infowindowElement = createInfowindowElement(item);
                let infowindow = new google.maps.InfoWindow({ content: infowindowElement });
                marker.addListener('click', function () {
                    if (openInfoWindow) openInfoWindow.close();
                    infowindow.open({ anchor: marker, map });
                    openInfoWindow = infowindow;
                });
                item.marker = marker;
                return item;
            });

            let markers = currentItems.map(item => item.marker);

            markerCluster = new MarkerClusterer(map, markers);
            markerCluster.setStyles([{
                url: urlBase + '/template/assets/images/cluster.png',
                height: 40,
                width: 40,
                textSize: 14,
                backgroundPosition: '0 0',
                iconAnchor: [26, 53],
                textColor: '#ffffff'
            }]);

            setTimeout(() => {
                clearFocus();
                showVisibleMarkers();
            }, 100);
        }
    }

    const locationElementTemplate = $("#contents").children().first();
    locationElementTemplate.remove();

    function showVisibleMarkers() {

        let showedItems = currentItems.filter(function (item) {
            return map.getBounds().contains(item.marker.getPosition());
        });

        $("#count-items-displayed").text(showedItems.length);

        $("#contents").empty();
        showedItems.forEach(function (item) {
            let locationElement = locationElementTemplate.clone();
            locationElement.html(locationElement.html().replace('$title', item.title));
            locationElement.html(locationElement.html().replace('data-src="$image"', 'src="' + item.image + '"'));
            locationElement.html(locationElement.html().replace('data-href="$path"', 'href="' + item.path + '"'));

            let location = item[textToSlug(locationField)];
            if (location && location.postalCode) locationElement.html(locationElement.html().replace('$postalCode', (location.postalCode + " " + (location.addressLocality ?? "")).trim()));
            else locationElement.find(".postal-code").hide();

            locationElement.removeClass('d-none');

            if (item[textToSlug(tagField)]) item[textToSlug(tagField)].slice(0, 2).forEach(function (besonderheitenItem) {
                locationElement.find(".tags").append(`<span class="badge text-bg-secondary">${besonderheitenItem}</span>`);
            });

            locationElement.on('click', function () {
                map.setZoom(12);
                map.setCenter(item.marker.getPosition());
                showVisibleMarkers();
                google.maps.event.trigger(item.marker, 'click');
            });
            $("#contents").append(locationElement);
        });

        showedItems = currentItems;
    }

    google.maps.event.addListener(map, 'dragend', showVisibleMarkers);
    google.maps.event.addListener(map, 'zoom_changed', showVisibleMarkers);

    $("#search-input").on("keyup", function (event) {
        if (event.key === "Enter") $("#search-button").click();
    });
    $("#search-button").on("click", function () {

        if ($("#search-input").val() === "") {
            $(".applied-filter[data-field='search']").addClass("d-none").removeClass("d-inline-block");
            $(".applied-filter[data-field='search']").find(".filter-name").text("");
        }
        else {
            $(".applied-filter[data-field='search']").removeClass("d-none").addClass("d-inline-block");
            $(".applied-filter[data-field='search']").find(".filter-name").text("Freitext: " + $("#search-input").val());
        }

        let selectedFilterOptions = $(".check-filter[name='filter-options']:checked").length;
        if (selectedFilterOptions > 0 || $("#ort").val() != "" || $("#search-input").val() != "") $("#reset-filters-button").show();
        else $("#reset-filters-button").hide();

        loadCurrentItems();
    });

    $(document).on("click", ".applied-filter", function () {
        let field = $(this).attr("data-field");
        if (field == "ort") $("#ort").val("");
        else if (field == "search") $("#search-input").val("");
        else {
            $(".check-filter[data-field='" + field + "'][name='filter-options']:checked").prop("checked", false);
            $(".check-filter[data-field='" + field + "'][name='filter-options']").trigger("change");
        }
    });

    $(document).on("change", ".check-filter", function () {
        loadCurrentItems();
    });

    function applyFilters() {
        let searchedValue = $("#search-input").val();
        currentItems = locationItems.filter(function (item) {
            return item.title.toLowerCase().includes(searchedValue.toLowerCase());
        });

        Object.keys(selectFields).forEach(function (name) {
            let key = textToSlug(name);

            let locationWithSelectField = currentItems.filter(function (item) {
                return item[key] != undefined;
            });

            let selectedOptions = $(".check-filter[data-field='" + name + "'][name='filter-options']:checked").map(function () {
                return $(this).val();
            }).get();

            if (selectedOptions.length > 0) {
                if (selectedOptions.length > 0) {
                    $(".applied-filter[data-field='" + name + "']").removeClass("d-none").addClass("d-inline-block");
                    $(".applied-filter[data-field='" + name + "']").find(".filter-name").text(name + ": " + selectedOptions.join(", "));
                }

                currentItems = locationWithSelectField.filter(function (item) {
                    return selectedOptions.some(function (selectedOption) {
                        return item[key].includes(selectedOption);
                    });
                });
            } else {
                $(".applied-filter[data-field='" + name + "']").removeClass("d-inline-block").addClass("d-none");
                $(".applied-filter[data-field='" + name + "']").find(".filter-name").text(name);
            }
        });

        let selectedFilterOptions = $(".check-filter[name='filter-options']:checked").length;
        if (selectedFilterOptions > 0 || $("#ort").val() != "" || $("#search-input").val() != "") $("#reset-filters-button").show();
        else $("#reset-filters-button").hide();
    }

    $("#reset-filters-button").click(function () {
        $("#search-input").val("");
        $("#search-button").trigger("click");
        $("#ort").val("");
        $("#ort").trigger("change");
        $(".check-filter").prop("checked", false);
        $(".check-filter").trigger('change');
        loadCurrentItems();
    });

    function setLocationFocus(address) {

        $(".applied-filter[data-field='ort']").show();
        $(".applied-filter[data-field='ort']").find(".filter-name").text("Ort: " + address);

        new google.maps.Geocoder().geocode({ 'address': address }, function (results, status) {
            if (status === google.maps.GeocoderStatus.OK) {
                map.setCenter(results[0].geometry.location);
                map.fitBounds(results[0].geometry.viewport);
            } else {
                console.warn('Geocode não obteve sucesso devido a: ' + status);
            }
        });
    }

    function clearFocus() {
        let markers = currentItems.map(item => item.marker);
        if (currentItems.length == 1) {
            map.setZoom(12);
            map.setCenter(markers[0].getPosition());
        } else {
            let bounds = new google.maps.LatLngBounds();
            markers.forEach(function (marker) {
                bounds.extend(marker.getPosition());
            });
            map.fitBounds(bounds);
        }
    }

    $('#ort').on("change", function () {
        if ($(this).val() === "") {
            clearFocus();
            $(".applied-filter[data-field='ort']").hide();
            $(".applied-filter[data-field='ort']").find(".filter-name").text("");
        }
        let selectedFilterOptions = $(".check-filter[name='filter-options']:checked").length;
        if (selectedFilterOptions > 0 || $("#ort").val() != "" || $("#search-input").val() != "") $("#reset-filters-button").show();
        else $("#reset-filters-button").hide();
    });

    let locationInput = $('#ort')[0];
    let autocomplete = new google.maps.places.Autocomplete(locationInput, { "types": ["country", "route", "street_address", "locality"], "componentRestrictions": { "country": ["de", "se", "at", "nl", "br"] } });
    autocomplete.addListener("place_changed", function () {
        let place = autocomplete.getPlace();
        let address = place.formatted_address;
        if (!place.geometry) {
            let inputText = locationInput.value;
            let autocompleteService = new google.maps.places.AutocompleteService();
            autocompleteService.getPlacePredictions({ input: inputText, componentRestrictions: { country: ["de", "se", "at", "nl", "br"] } }, function (predictions, status) {
                if (status === google.maps.places.PlacesServiceStatus.OK && predictions && predictions.length > 0) {
                    let firstPrediction = predictions[0];
                    address = firstPrediction.description;
                    locationInput.value = address;
                    setLocationFocus(address);
                }
            });
        } else setLocationFocus(address);
    });

}