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/*
 * Copyright (c) 2008-2024, Hazelcast, Inc. All Rights Reserved.
 *
 * 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.hazelcast.query.impl;

import com.hazelcast.internal.serialization.Data;
import com.hazelcast.internal.serialization.InternalSerializationService;
import com.hazelcast.internal.serialization.SerializationService;
import com.hazelcast.map.impl.MapDataSerializerHook;
import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import com.hazelcast.nio.serialization.IdentifiedDataSerializable;

import java.io.IOException;

/**
 * Entry of the Query.
 *
 * @param  key
 * @param  value
 */
@SuppressWarnings("removal")
public class CachedQueryEntry extends QueryableEntry implements IdentifiedDataSerializable {

    protected Data keyData;
    protected Data valueData;

    protected K keyObject;
    protected V valueObject;

    public CachedQueryEntry() {
    }

    public CachedQueryEntry(SerializationService ss, Object key, Object value) {
        init(ss, key, value);
    }

    public CachedQueryEntry init(SerializationService ss, Object key, Object value) {
        this.serializationService = (InternalSerializationService) ss;
        return init(key, value);
    }

    @SuppressWarnings("unchecked")
    public CachedQueryEntry init(Object key, Object value) {
        if (key == null) {
            throw new IllegalArgumentException("keyData cannot be null");
        }

        if (key instanceof Data data) {
            this.keyData = data;
            this.keyObject = null;
        } else {
            this.keyObject = (K) key;
            this.keyData = null;
        }

        if (value instanceof Data data) {
            this.valueData = data;
            this.valueObject = null;
        } else {
            this.valueObject = (V) value;
            this.valueData = null;
        }

        return this;
    }

    @SuppressWarnings("unchecked")
    public CachedQueryEntry initWithObjectKeyValue(Object key, Object value) {
        this.keyObject = (K) key;
        this.keyData = null;
        this.valueObject = (V) value;
        this.valueData = null;

        return this;
    }

    @Override
    public K getKey() {
        if (keyObject == null) {
            keyObject = serializationService.toObject(keyData);
        }
        return keyObject;
    }

    @Override
    public Data getKeyData() {
        return keyData;
    }

    @Override
    public V getValue() {
        if (valueObject == null) {
            valueObject = serializationService.toObject(valueData);
        }
        return valueObject;
    }

    @Override
    public Data getValueData() {
        if (valueData == null) {
            valueData = serializationService.toData(valueObject);
        }
        return valueData;
    }

    @Override
    public K getKeyIfPresent() {
        return keyObject != null ? keyObject : null;
    }

    @Override
    public Data getKeyDataIfPresent() {
        return keyData;
    }

    @SuppressWarnings("unchecked")
    @Override
    public V getValueIfPresent() {
        if (valueObject != null) {
            return valueObject;
        }

        return null;
    }

    @Override
    public Data getValueDataIfPresent() {
        if (valueData != null) {
            return valueData;
        }

        return null;
    }

    @Override
    public V setValue(V value) {
        throw new UnsupportedOperationException();
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        CachedQueryEntry that = (CachedQueryEntry) o;
        return keyData.equals(that.keyData);
    }

    @Override
    public int hashCode() {
        return keyData.hashCode();
    }

    @Override
    public void writeData(ObjectDataOutput out) throws IOException {
        out.writeObject(getKey());
        out.writeObject(getValue());
    }

    @Override
    public void readData(ObjectDataInput in) throws IOException {
        keyObject = in.readObject();
        valueObject = in.readObject();
    }

    @Override
    public int getFactoryId() {
        return MapDataSerializerHook.F_ID;
    }

    @Override
    public int getClassId() {
        // We are intentionally deserializing CachedQueryEntry as LazyMapEntry
        // LazyMapEntry is actually a subclass of CacheQueryEntry.
        // If this sounds surprising, convoluted or just plain wrong
        // then you are not wrong. Please see commit message for reasoning.
        return MapDataSerializerHook.LAZY_MAP_ENTRY;
    }
}