/*
 * Copyright (C) 2020 The zfoo 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 com.zfoo.protocol.serializer.cpp;

import com.zfoo.protocol.IPacket;
import com.zfoo.protocol.generate.GenerateProtocolFile;
import com.zfoo.protocol.model.Pair;
import com.zfoo.protocol.registration.field.IFieldRegistration;
import com.zfoo.protocol.registration.field.ObjectProtocolField;
import com.zfoo.protocol.serializer.enhance.EnhanceObjectProtocolSerializer;
import com.zfoo.protocol.util.StringUtils;

import java.lang.reflect.Field;

import static com.zfoo.protocol.util.FileUtils.LS;


/**
 * @author godotg
 * @version 3.0
 */
public class CppObjectProtocolSerializer implements ICppSerializer {

    @Override
    public Pair<String, String> field(Field field, IFieldRegistration fieldRegistration) {
        ObjectProtocolField objectProtocolField = (ObjectProtocolField) fieldRegistration;
        var protocolSimpleName = EnhanceObjectProtocolSerializer.getProtocolClassSimpleName(objectProtocolField.getProtocolId());
        var type = StringUtils.format("{}", protocolSimpleName);
        return new Pair<>(type, field.getName());
    }

    @Override
    public void writeObject(StringBuilder builder, String objectStr, int deep, Field field, IFieldRegistration fieldRegistration) {
        ObjectProtocolField objectProtocolField = (ObjectProtocolField) fieldRegistration;
        GenerateProtocolFile.addTab(builder, deep);
        if (IPacket.class.isAssignableFrom(field.getType())) {
            builder.append(StringUtils.format("buffer.writePacket({}, {});", objectStr, objectProtocolField.getProtocolId()))
                    .append(LS);
        } else {
            builder.append(StringUtils.format("buffer.writePacket((IPacket *) &{}, {});", objectStr, objectProtocolField.getProtocolId()))
                    .append(LS);
        }
    }

    @Override
    public String readObject(StringBuilder builder, int deep, Field field, IFieldRegistration fieldRegistration) {
        ObjectProtocolField objectProtocolField = (ObjectProtocolField) fieldRegistration;
        String uniquePtr = "result" + GenerateProtocolFile.index.getAndIncrement();
        String ptr = "result" + GenerateProtocolFile.index.getAndIncrement();

        var protocolSimpleName = EnhanceObjectProtocolSerializer.getProtocolClassSimpleName(objectProtocolField.getProtocolId());

        GenerateProtocolFile.addTab(builder, deep);
        builder.append(StringUtils.format("auto {} = buffer.readPacket({});", uniquePtr, objectProtocolField.getProtocolId())).append(LS);
        GenerateProtocolFile.addTab(builder, deep);
        builder.append(StringUtils.format("auto *{} = ({} *) {}.get();", ptr, protocolSimpleName, uniquePtr)).append(LS);
        return ptr;
    }

}
