/*
 *     Copyright 2016 IBM Corp.
 *     Licensed under the Apache License, Version 2.0 (the "License");
 *     you may not use this file except in compliance with the License.
 *     You may obtain a copy of the License at
 *     http://www.apache.org/licenses/LICENSE-2.0
 *     Unless required by applicable law or agreed to in writing, software
 *     distributed under the License is distributed on an "AS IS" BASIS,
 *     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *     See the License for the specific language governing permissions and
 *     limitations under the License.
 */
using System.Collections.Generic;
using System.Linq;

namespace JSONStoreWin8Lib.JSONStore
{
    class JSONStoreSchema
    {
        private IDictionary<string, string> searchFields;
        private IDictionary<string, string> additionalSearchFields;

        public JSONStoreSchema(IDictionary<string, string> searchFields, IDictionary<string, string> additionalSearchFields)
        {
            this.searchFields = searchFields;
            this.additionalSearchFields = additionalSearchFields;
        }

        public IDictionary<string, string> getCombinedDictionary()
        {
            if (searchFields == null && additionalSearchFields == null)
            {
                return new Dictionary<string, string>();
            } 
            else if (additionalSearchFields == null)
            {
                return searchFields;
            } 
            else if (searchFields == null)
            {
                return additionalSearchFields;
            }
            return searchFields.Union(additionalSearchFields).ToDictionary(s => s.Key, s => s.Value);
        }

        public ICollection<string> getKeys()
        {
            return searchFields.Keys;
        }
    }
}