SearchResults searchAvailableActivities(SearchCriteria criteria) {
        log.debug "Search service search with criteria: $criteria"

        DateTime startTime = criteria.startTime
        DateTime endTime = startTime.plusHours(24)
        def c = Activity.createCriteria()



        log.debug "Search service startTime:$startTime endTime:$endTime"

        def results = c.list {
            and {

                if (criteria.type) {
                    log.debug "Adding activity type to search. typeName: ${criteria.type.typeName}"
                    activityType {
                        eq("typeName", criteria.type.typeName)
                    }
                }
                availabilities {
                    //To qualify as a valid result the startDate must be less than or equal to the time being searched
                    // and the endDate must not have already passed
                    le('startDate', startTime.millis)
                    ge('endDate', endTime.millis)

                }

            }
        }

        List<SearchResult> resultList = new ArrayList<SearchResult>()


        if (results) {
            results.each {activity ->
                log.debug "Results found"
                def availabilities = activity.availabilities
                availabilities.each {

                    def retValue = it.isAvailable(startTime, criteria.numberOfParticipants)
                    if (retValue) {
                        log.debug "Adding search result for $activity.activityName"
                        SearchResult aResult = new SearchResult()
                        resultList.add(aResult)
                    }
                }


            }
        }

        return new SearchResults(results: resultList)


    }