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/*
 * Copyright (C) 2015 the original author or authors.
 *
 * 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 ro.pippo.jackson;

import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.module.afterburner.AfterburnerModule;
import ro.pippo.core.Application;
import ro.pippo.core.ContentTypeEngine;
import ro.pippo.core.HttpConstants;
import ro.pippo.core.PippoRuntimeException;

import java.io.IOException;
import java.util.TimeZone;

/**
 * Base class for ContentTypeEngines based on Jackson.
 *
 * @author James Moger
 */
public abstract class JacksonBaseEngine implements ContentTypeEngine {

    protected ObjectMapper objectMapper;

    @Override
    public void init(Application application) {
        objectMapper = getObjectMapper();
        objectMapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
        objectMapper.setTimeZone(TimeZone.getDefault());
        objectMapper.registerModule(new AfterburnerModule());
    }

    protected abstract ObjectMapper getObjectMapper();

    @Override
    public String toString(Object object) {
        try {
            return objectMapper.writeValueAsString(object);
        } catch (JsonProcessingException e) {
            throw new PippoRuntimeException(e, "Error serializing object to {}", getContentType());
        }
    }

    @Override
    public  T fromString(String content, Class classOfT) {
        try {
            return objectMapper.readValue(content, classOfT);
        } catch (JsonParseException | JsonMappingException e) {
            throw new PippoRuntimeException(e, "Error deserializing {}", getContentType());
        } catch (IOException e) {
            throw new PippoRuntimeException(e, "Invalid {} document", getContentType());
        }
    }

}