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MockServer NeoLight Core
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/*
 * Copyright © 2024 XDEV Software (https://xdev.software)
 *
 * 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.
 */
package software.xdev.mockserver.serialization;

import static software.xdev.mockserver.character.Character.NEW_LINE;
import static software.xdev.mockserver.util.StringUtils.isBlank;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.ObjectWriter;

import software.xdev.mockserver.model.HttpResponse;
import software.xdev.mockserver.serialization.model.HttpResponseDTO;


public class HttpResponseSerializer implements Serializer
{
	private final ObjectWriter objectWriter = ObjectMapperFactory.createObjectMapper(true, false);
	private final ObjectMapper objectMapper = ObjectMapperFactory.createObjectMapper();
	private final JsonArraySerializer jsonArraySerializer = new JsonArraySerializer();
	
	@Override
	public String serialize(final HttpResponse httpResponse)
	{
		try
		{
			return this.objectWriter.writeValueAsString(new HttpResponseDTO(httpResponse));
		}
		catch(final Exception e)
		{
			throw new IllegalStateException(
				"Exception while serializing httpResponse to JSON with value " + httpResponse,
				e);
		}
	}
	
	public String serialize(final List httpResponses)
	{
		return this.serialize(httpResponses.toArray(new HttpResponse[0]));
	}
	
	public String serialize(final HttpResponse... httpResponses)
	{
		try
		{
			if(httpResponses != null && httpResponses.length > 0)
			{
				final HttpResponseDTO[] httpResponseDTOs = new HttpResponseDTO[httpResponses.length];
				for(int i = 0; i < httpResponses.length; i++)
				{
					httpResponseDTOs[i] = new HttpResponseDTO(httpResponses[i]);
				}
				return this.objectWriter.writeValueAsString(httpResponseDTOs);
			}
			else
			{
				return "[]";
			}
		}
		catch(final Exception e)
		{
			throw new IllegalStateException(
				"Exception while serializing HttpResponse to JSON with value " + Arrays.asList(httpResponses),
				e);
		}
	}
	
	@SuppressWarnings("checkstyle:FinalParameters")
	@Override
	public HttpResponse deserialize(String jsonHttpResponse)
	{
		if(jsonHttpResponse.contains("\"httpResponse\""))
		{
			try
			{
				final JsonNode jsonNode = this.objectMapper.readTree(jsonHttpResponse);
				if(jsonNode.has("httpResponse"))
				{
					jsonHttpResponse = jsonNode.get("httpResponse").toString();
				}
			}
			catch(final Exception ex)
			{
				throw new IllegalArgumentException(
					"exception while parsing [" + jsonHttpResponse + "] for HttpResponse",
					ex);
			}
		}
		HttpResponse httpResponse = null;
		try
		{
			final HttpResponseDTO httpResponseDTO =
				this.objectMapper.readValue(jsonHttpResponse, HttpResponseDTO.class);
			if(httpResponseDTO != null)
			{
				httpResponse = httpResponseDTO.buildObject();
			}
		}
		catch(final Exception ex)
		{
			throw new IllegalArgumentException(
				"exception while parsing [" + jsonHttpResponse + "] for HttpResponse",
				ex);
		}
		return httpResponse;
	}
	
	@Override
	public Class supportsType()
	{
		return HttpResponse.class;
	}
	
	public HttpResponse[] deserializeArray(final String jsonHttpResponses)
	{
		final List httpResponses = new ArrayList<>();
		if(isBlank(jsonHttpResponses))
		{
			throw new IllegalArgumentException(
				"1 error:" + NEW_LINE + " - a response or response array is required but value was \""
					+ jsonHttpResponses + "\"");
		}
		else
		{
			final List jsonResponseList = this.jsonArraySerializer.splitJSONArray(jsonHttpResponses);
			if(jsonResponseList.isEmpty())
			{
				throw new IllegalArgumentException(
					"1 error:" + NEW_LINE + " - a response or array of response is required");
			}
			else
			{
				final List validationErrorsList = new ArrayList<>();
				for(final String jsonExpectation : jsonResponseList)
				{
					try
					{
						httpResponses.add(this.deserialize(jsonExpectation));
					}
					catch(final IllegalArgumentException iae)
					{
						validationErrorsList.add(iae.getMessage());
					}
				}
				if(!validationErrorsList.isEmpty())
				{
					throw new IllegalArgumentException((validationErrorsList.size() > 1 ? "[" : "")
						+ String.join("," + NEW_LINE, validationErrorsList)
						+ (validationErrorsList.size() > 1 ? "]" : ""));
				}
			}
		}
		return httpResponses.toArray(new HttpResponse[0]);
	}
}