/* SPDX-License-Identifier: Apache-2.0
*
* The OpenSearch Contributors require contributions made to
* this file be licensed under the Apache-2.0 license or a
* compatible open source license.
*/
/*
* Modifications Copyright OpenSearch Contributors. See
* GitHub history for details.
*
*  Licensed to Elasticsearch B.V. under one or more contributor
*  license agreements. See the NOTICE file distributed with
*  this work for additional information regarding copyright
*  ownership. Elasticsearch B.V. licenses this file to you 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 OpenSearch.Net.Utf8Json;

namespace OpenSearch.Client
{
	internal class AnalyzerFormatter : IJsonFormatter<IAnalyzer>
	{
		public IAnalyzer Deserialize(ref JsonReader reader, IJsonFormatterResolver formatterResolver)
		{
			var arraySegment = reader.ReadNextBlockSegment();
			var segmentReader = new JsonReader(arraySegment.Array, arraySegment.Offset);
			var count = 0;
			string analyzerType = null;
			var tokenizerPresent = false;
			while (segmentReader.ReadIsInObject(ref count))
			{
				var propertyName = segmentReader.ReadPropertyName();
				switch (propertyName)
				{
					case "type":
						analyzerType = segmentReader.ReadString();
						break;
					case "tokenizer":
						segmentReader.ReadNext();
						tokenizerPresent = true;
						break;
					default:
						segmentReader.ReadNextBlock();
						break;
				}
			}

			segmentReader = new JsonReader(arraySegment.Array, arraySegment.Offset);

			switch (analyzerType)
			{
				case "stop":
					return Deserialize<StopAnalyzer>(ref segmentReader, formatterResolver);
				case "standard":
					return Deserialize<StandardAnalyzer>(ref segmentReader, formatterResolver);
				case "snowball":
					return Deserialize<SnowballAnalyzer>(ref segmentReader, formatterResolver);
				case "pattern":
					return Deserialize<PatternAnalyzer>(ref segmentReader, formatterResolver);
				case "keyword":
					return Deserialize<KeywordAnalyzer>(ref segmentReader, formatterResolver);
				case "whitespace":
					return Deserialize<WhitespaceAnalyzer>(ref segmentReader, formatterResolver);
				case "simple":
					return Deserialize<SimpleAnalyzer>(ref segmentReader, formatterResolver);
				case "fingerprint":
					return Deserialize<FingerprintAnalyzer>(ref segmentReader, formatterResolver);
				case "kuromoji":
					return Deserialize<KuromojiAnalyzer>(ref segmentReader, formatterResolver);
				case "nori":
					return Deserialize<NoriAnalyzer>(ref segmentReader, formatterResolver);
				case "icu_analyzer":
					return Deserialize<IcuAnalyzer>(ref segmentReader, formatterResolver);
				default:
					if (tokenizerPresent)
						return Deserialize<CustomAnalyzer>(ref segmentReader, formatterResolver);

					return Deserialize<LanguageAnalyzer>(ref segmentReader, formatterResolver);
			}
		}

		public void Serialize(ref JsonWriter writer, IAnalyzer value, IJsonFormatterResolver formatterResolver)
		{
			if (value == null)
			{
				writer.WriteNull();
				return;
			}

			switch (value.Type)
			{
				case "stop":
					Serialize<IStopAnalyzer>(ref writer, value, formatterResolver);
					break;
				case "standard":
					Serialize<IStandardAnalyzer>(ref writer, value, formatterResolver);
					break;
				case "snowball":
					Serialize<ISnowballAnalyzer>(ref writer, value, formatterResolver);
					break;
				case "pattern":
					Serialize<IPatternAnalyzer>(ref writer, value, formatterResolver);
					break;
				case "keyword":
					Serialize<IKeywordAnalyzer>(ref writer, value, formatterResolver);
					break;
				case "whitespace":
					Serialize<IWhitespaceAnalyzer>(ref writer, value, formatterResolver);
					break;
				case "simple":
					Serialize<ISimpleAnalyzer>(ref writer, value, formatterResolver);
					break;
				case "fingerprint":
					Serialize<IFingerprintAnalyzer>(ref writer, value, formatterResolver);
					break;
				case "kuromoji":
					Serialize<IKuromojiAnalyzer>(ref writer, value, formatterResolver);
					break;
				case "nori":
					Serialize<INoriAnalyzer>(ref writer, value, formatterResolver);
					break;
				case "icu_analyzer":
					Serialize<IIcuAnalyzer>(ref writer, value, formatterResolver);
					break;
				case "custom":
					Serialize<ICustomAnalyzer>(ref writer, value, formatterResolver);
					break;
				default:
					Serialize<ILanguageAnalyzer>(ref writer, value, formatterResolver);
					break;
			}
		}

		private static void Serialize<TAnalyzer>(ref JsonWriter writer, IAnalyzer value, IJsonFormatterResolver formatterResolver)
			where TAnalyzer : class, IAnalyzer
		{
			var formatter = formatterResolver.GetFormatter<TAnalyzer>();
			formatter.Serialize(ref writer, value as TAnalyzer, formatterResolver);
		}

		private static TAnalyzer Deserialize<TAnalyzer>(ref JsonReader reader, IJsonFormatterResolver formatterResolver)
			where TAnalyzer : IAnalyzer
		{
			var formatter = formatterResolver.GetFormatter<TAnalyzer>();
			return formatter.Deserialize(ref reader, formatterResolver);
		}
	}
}