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/*
 * Copyright 2019 the original author or authors.
 *
 * Licensed under the Apache, 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.gnu.org/licenses/lgpl-3.0.html
 *
 * 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 com.jn.easyjson.jackson;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.type.CollectionType;
import com.jn.easyjson.core.JsonException;
import com.jn.easyjson.core.JsonHandlerAdapter;
import com.jn.easyjson.core.JsonTreeNode;
import com.jn.easyjson.jackson.node.JacksonJsonMapper;
import com.jn.langx.util.collection.multivalue.MultiValueMap;
import com.jn.langx.util.io.IOs;
import com.jn.langx.util.io.unicode.Utf8s;
import com.jn.langx.util.logging.Loggers;
import com.jn.langx.util.reflect.Reflects;
import com.jn.langx.util.reflect.type.Types;
import org.slf4j.Logger;

import java.io.IOException;
import java.io.Reader;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.Collection;
import java.util.Map;

public class JacksonAdapter extends JsonHandlerAdapter {
    private static final Logger logger = Loggers.getLogger(JacksonAdapter.class);
    @Override
    public  T deserialize(String json, Type typeOfT) throws JsonException {
        try {
            if (getJsonBuilder().enableDecodeHex()) {
                json = Utf8s.convertHexToUnicode(json);
            }
            return getDelegate().readValue(json, toJavaType(typeOfT));
        } catch (Throwable ex) {
            throw new JsonException(ex);
        }
    }

    @Override
    public  T deserialize(Reader reader, Type typeOfT) throws JsonException {
        String json = null;
        try {
            json = IOs.readAsString(reader);
            return deserialize(json, typeOfT);
        } catch (IOException ex) {
            logger.error("invalid json string: {}",json);
            throw new JsonException(ex);
        }
    }

    private JavaType toJavaType(Type typeOfT) {
        if (Jacksons.isJacksonJavaType(typeOfT)) {
            return Jacksons.toJavaType(typeOfT);
        }
        if (Types.isPrimitive(typeOfT)) {
            return getDelegate().getTypeFactory().constructType(Types.getPrimitiveWrapClass(typeOfT));
        }

        if (Types.isClass(typeOfT)) {
            return getDelegate().getTypeFactory().constructType(Types.toClass(typeOfT));
        }

        if (Types.isParameterizedType(typeOfT)) {
            ParameterizedType pType = (ParameterizedType) typeOfT;
            Class parametrized = Types.toClass(pType.getRawType());
            Type[] parameterTypes = pType.getActualTypeArguments();
            JavaType[] parameterClasses = new JavaType[parameterTypes.length];
            for (int i = 0; i < parameterTypes.length; i++) {
                parameterClasses[i] = toJavaType(parameterTypes[i]);
            }
            if (parametrized.isInterface() && Reflects.isSubClassOrEquals(MultiValueMap.class, parametrized)) {
                if (Jacksons.getCurrentVersion().compareTo(Jacksons.VERSION_2_9_0) < 0) {
                    CollectionType collectionType = getDelegate().getTypeFactory().constructCollectionType(Collection.class, parameterClasses[1]);
                    return getDelegate().getTypeFactory().constructMapType((Class>) parametrized, parameterClasses[0], collectionType);
                }
            }
            return getDelegate().getTypeFactory().constructParametricType(parametrized, parameterClasses);
        }
        return Jacksons.toJavaType(typeOfT);
    }

    @Override
    public JsonTreeNode deserialize(String json) throws JsonException {
        try {
            if (getJsonBuilder().enableDecodeHex()) {
                json = Utf8s.convertHexToUnicode(json);
            }
            JsonNode jsonNode = getDelegate().readTree(json);
            return JacksonJsonMapper.toJsonTreeNode(jsonNode);
        } catch (Throwable ex) {
            throw new JsonException(ex);
        }
    }

    @Override
    public String serialize(Object src, Type typeOfT) throws JsonException {
        try {
            if (src instanceof JsonTreeNode) {
                JsonNode jsonNode = JacksonJsonMapper.fromJsonTreeNode((JsonTreeNode) src);
                return getDelegate().writeValueAsString(jsonNode);
            }
            return getDelegate().writeValueAsString(src);
        } catch (JsonProcessingException e) {
            throw new JsonException(e);
        }
    }

    @Deprecated
    public void setObjectMapper(ObjectMapper objectMapper) {
        setDelegate(objectMapper);
    }

}