function resetInsertAppointmentForm() {
    $.get(getResetSelectedAppointmentUrl())
        .always(function() {
            if($(window).width() < 768) {
                hideAppointmentForm();
            }
        });

    $("#scheduler-start-time, #scheduler-end-time, #subject, #location, #notice").val("");

    $("#scheduler-start-date, #scheduler-end-date").val(moment().format("DD.MM.YYYY"));

    $("#resources-popup input:checked, #customers-popup input:checked, #employees-popup input:checked").each(function() {
        $(this).prop("checked", false);
    });

    $("#selected-resources-list, #selected-employees-list, #selected-customers-list").empty();

    $("#IsAllDay").prop("checked", false);
    $("#IsPrivate").prop("checked", false);
}

function submitInsertAppointmentForm() {
    showSpinner();
    validateAppointmentForm();
}

function submitSchedulerDateForm() {
    showSpinner();
    $("#scheduler-date-form").submit();
}

function validateAppointmentForm() {
    var isAllDay = $("#IsAllDay").prop("checked") === true;
    

    var startTimePicker = $("#scheduler-start-time-picker");
    var startDatePicker = $("#scheduler-start-date-picker");
    var endTimePicker = $("#scheduler-end-time-picker");
    var endDatePicker = $("#scheduler-end-date-picker");

    var isStartTimeInputEmpty = isAllDay ? false : isEmptyOrSpaces($("#scheduler-start-time").val());
    var isEndTimeInputEmpty = isAllDay ? false : isEmptyOrSpaces($("#scheduler-end-time").val());
    var isStartDateInputEmpty = isEmptyOrSpaces($("#scheduler-start-date").val());
    var isEndDateInputEmpty = isEmptyOrSpaces($("#scheduler-end-date").val());
    
    startTimePicker.datetimepicker("show");
    startTimePicker.datetimepicker("hide");

    startDatePicker.datetimepicker("show");
    startDatePicker.datetimepicker("hide");

    endTimePicker.datetimepicker("show");
    endTimePicker.datetimepicker("hide");

    endDatePicker.datetimepicker("show");
    endDatePicker.datetimepicker("hide");

    var startTime = startTimePicker.datetimepicker("date");
    var endTime = endTimePicker.datetimepicker("date");
    var startDate = startDatePicker.datetimepicker("date");
    var endDate = endDatePicker.datetimepicker("date");

    var a = startDate === undefined || startDate === null || !startDate.isValid();
    var b = endDate === undefined || endDate === null || !endDate.isValid();
    var c = isAllDay ? false : startTime === undefined || startTime === null || !startTime.isValid();
    var d = isAllDay ? false : endTime === undefined || endTime === null || !endTime.isValid();
    
    if (a || b || c || d || isStartDateInputEmpty || isStartTimeInputEmpty || isEndTimeInputEmpty || isEndDateInputEmpty) {
        hideSpinner();

        logInfo3("Datumsproblem!");

        showMessagePopupWithHtml("Fehler", '<div class="alert alert-danger" role="alert">Die Zeit- und/oder Datumsangaben sind nicht korrekt.</div>');

        $("#scheduler-start-time, #scheduler-end-time").val("");
        return;
    }

    if(endDate.isValid() === false) {
        endDate = startDate.clone();
    }

    var startHours = 0;
    var startMinutes = 0;
    var endHours = 0;
    var endMinutes = 0;

    if(isAllDay === false) {
        startHours = startTime.hours();
        startMinutes = startTime.minutes();
        endHours = endTime.hours();
        endMinutes = endTime.minutes();
    }

    startDate = startDate.hours(startHours);
    startDate = startDate.minutes(startMinutes);

    endDate = endDate.hours(endHours);
    endDate = endDate.minutes(endMinutes);

    if(endDate.isBefore(startDate)) {
        hideSpinner();
        //$("#messagePopup .modal-body").html('<div class="alert alert-danger" role="alert">Das Startdatum muss vor dem Enddatum liegen.</div>');
        showMessagePopupWithHtml("Fehler", '<div class="alert alert-danger" role="alert">Das Startdatum muss vor dem Enddatum liegen.</div>');
        return;
    }

    var selectedOids = [];
    var oidString = "";

    $("#resources-popup input:checked").each(function() {
        var id = $(this).attr("id");
        selectedOids.push(id.split("-")[0]);
    });

    for(var i = 0; i < selectedOids.length; i++) {
        oidString += selectedOids[i] + ",";
    }

    $.get(getCheckResourcesAvailabilityUrl(), { start: startDate.format("DD.MM.YYYY HH:mm"), end: endDate.format("DD.MM.YYYY HH:mm"), resourceOids: oidString }).done(function(result) {
        if(result === undefined || result === null || result.length === 0) {
            return;
        }

        if (result.length > 1) {
            try {
                var unavailableResources = $.parseJSON(result);
                var resourceCount = 0;
                var names = "";

                $.each(unavailableResources, function(index, resource) {
                    if (names.length > 1) {
                        names += ", ";
                    }

                    resourceCount++;

                    names += resource.Name;
                });

                var unavailableResourcesMessage;
                
                if(resourceCount > 0) {
                    if(resourceCount > 1) {
                        unavailableResourcesMessage = "Einige der ausgewählten Ressourcen (" + names + ") sind zum gewählten Zeitpunkt nicht verfügbar.";
                    } else {
                        unavailableResourcesMessage = "Eine der ausgewählten Ressourcen (" + names + ") ist zum gewählten Zeitpunkt nicht verfügbar.";
                    }
                    
                    hideSpinner();

                    showWarningMessageBox("Überschneidung", unavailableResourcesMessage, function() {
                        $("#messagePopup .modal-body").html();
                        showSpinner();
                        insertOrUpdateAppointment(startDate.format("DD.MM.YYYY"), endDate.format("DD.MM.YYYY"), startDate.format("HH:mm"), endDate.format("HH:mm"));
                    }, false);

                    return;
                }
            } catch(error) {
                showErrorPopup(error);
                return;
            }
        }

        insertOrUpdateAppointment(startDate.format("DD.MM.YYYY"), endDate.format("DD.MM.YYYY"), startDate.format("HH:mm"), endDate.format("HH:mm"));
    });
}

function insertOrUpdateAppointment(formattedStartDate, formattedEndDate, formattedStartTime, formattedEndTime) {
    $.get(
        getCheckForOverlappingAppointmentsUrl(),
        {
            startDateRaw: formattedStartDate,
            endDateRaw: formattedEndDate,
            startTimeRaw: formattedStartTime,
            endTimeRaw: formattedEndTime
        }
    ).done(function(result) {
        var isOverlapping = $.parseJSON(result);

        if(isOverlapping === true) {
            hideSpinner();
            $("#messagePopup .modal-body").html('<div class="alert alert-warning" role="alert">Dieser Termin überschneidet sich mit einem anderen bereits existierenden Termin.<br/> Möchten Sie ihn wirklich speichern?</div>');
            showMessagePopupWithCallback(
                "Überschneidung",
                null,
                function() {
                    $("#messagePopup .modal-body").html();
                    showSpinner();
                    $("#insert-appointment-form").submit();
                },
                false);
        } else {
            $("#insert-appointment-form").submit();
        }
    });
}

function hideAppointmentForm() {
    $("#form-container").addClass("d-none d-sm-none");
}

function showAppointmentForm() {
    $("#form-container").removeClass("d-none d-sm-none");
    calcPrependTextSizes();
}

function toggleAppointmentForm() {
    var isVisible = $("#form-container").css("display") === "block";

    if (isVisible) {
        hideAppointmentForm();
    } else {
        showAppointmentForm();
    }
}

function listSearchOnChange(searchInputId, entryClass, textClass) {
    try {
        var text = $("#" + searchInputId).val().toLowerCase();

        var entries = $("." + entryClass);

        if (text.length === 0) {
            entries.show();
        }

        $.each(entries, function (index, item) {
            var customer = $(item);

            if (customer.find("." + textClass).text().toLowerCase().includes(text)) {
                customer.show();
            } else {
                customer.hide();
            }
        });
    } catch (error) {
        showErrorPopup(error);
    }
}

function resetSearch(searchInputId, entryClass) {
    try {
        $("#" + searchInputId).val("");
        $("." + entryClass).show();
    } catch (error) {
        showErrorPopup(error);
    }
}