/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.datastax.driver.core;

import com.datastax.driver.core.utils.MoreObjects;
import com.google.common.reflect.TypeToken;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.net.InetAddress;
import java.nio.ByteBuffer;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.UUID;

// We don't want to expose this one: it's less useful externally and it's a bit ugly to expose
// anyway (but it's convenient).
abstract class AbstractData<T extends SettableData<T>> extends AbstractGettableData
    implements SettableData<T> {

  final T wrapped;
  final ByteBuffer[] values;

  // Ugly, we could probably clean that: it is currently needed however because we sometimes
  // want wrapped to be 'this' (UDTValue), and sometimes some other object (in BoundStatement).
  @SuppressWarnings("unchecked")
  protected AbstractData(ProtocolVersion protocolVersion, int size) {
    super(protocolVersion);
    this.wrapped = (T) this;
    this.values = new ByteBuffer[size];
  }

  protected AbstractData(ProtocolVersion protocolVersion, T wrapped, int size) {
    this(protocolVersion, wrapped, new ByteBuffer[size]);
  }

  protected AbstractData(ProtocolVersion protocolVersion, T wrapped, ByteBuffer[] values) {
    super(protocolVersion);
    this.wrapped = wrapped;
    this.values = values;
  }

  protected abstract int[] getAllIndexesOf(String name);

  protected T setValue(int i, ByteBuffer value) {
    values[i] = value;
    return wrapped;
  }

  @Override
  protected ByteBuffer getValue(int i) {
    return values[i];
  }

  @Override
  protected int getIndexOf(String name) {
    return getAllIndexesOf(name)[0];
  }

  @Override
  public T setBool(int i, boolean v) {
    TypeCodec<Boolean> codec = codecFor(i, Boolean.class);
    ByteBuffer bb;
    if (codec instanceof TypeCodec.PrimitiveBooleanCodec)
      bb = ((TypeCodec.PrimitiveBooleanCodec) codec).serializeNoBoxing(v, protocolVersion);
    else bb = codec.serialize(v, protocolVersion);
    return setValue(i, bb);
  }

  @Override
  public T setBool(String name, boolean v) {
    for (int i : getAllIndexesOf(name)) {
      setBool(i, v);
    }
    return wrapped;
  }

  @Override
  public T setByte(int i, byte v) {
    TypeCodec<Byte> codec = codecFor(i, Byte.class);
    ByteBuffer bb;
    if (codec instanceof TypeCodec.PrimitiveByteCodec)
      bb = ((TypeCodec.PrimitiveByteCodec) codec).serializeNoBoxing(v, protocolVersion);
    else bb = codec.serialize(v, protocolVersion);
    return setValue(i, bb);
  }

  @Override
  public T setByte(String name, byte v) {
    for (int i : getAllIndexesOf(name)) {
      setByte(i, v);
    }
    return wrapped;
  }

  @Override
  public T setShort(int i, short v) {
    TypeCodec<Short> codec = codecFor(i, Short.class);
    ByteBuffer bb;
    if (codec instanceof TypeCodec.PrimitiveShortCodec)
      bb = ((TypeCodec.PrimitiveShortCodec) codec).serializeNoBoxing(v, protocolVersion);
    else bb = codec.serialize(v, protocolVersion);
    return setValue(i, bb);
  }

  @Override
  public T setShort(String name, short v) {
    for (int i : getAllIndexesOf(name)) {
      setShort(i, v);
    }
    return wrapped;
  }

  @Override
  public T setInt(int i, int v) {
    TypeCodec<Integer> codec = codecFor(i, Integer.class);
    ByteBuffer bb;
    if (codec instanceof TypeCodec.PrimitiveIntCodec)
      bb = ((TypeCodec.PrimitiveIntCodec) codec).serializeNoBoxing(v, protocolVersion);
    else bb = codec.serialize(v, protocolVersion);
    return setValue(i, bb);
  }

  @Override
  public T setInt(String name, int v) {
    for (int i : getAllIndexesOf(name)) {
      setInt(i, v);
    }
    return wrapped;
  }

  @Override
  public T setLong(int i, long v) {
    TypeCodec<Long> codec = codecFor(i, Long.class);
    ByteBuffer bb;
    if (codec instanceof TypeCodec.PrimitiveLongCodec)
      bb = ((TypeCodec.PrimitiveLongCodec) codec).serializeNoBoxing(v, protocolVersion);
    else bb = codec.serialize(v, protocolVersion);
    return setValue(i, bb);
  }

  @Override
  public T setLong(String name, long v) {
    for (int i : getAllIndexesOf(name)) {
      setLong(i, v);
    }
    return wrapped;
  }

  @Override
  public T setTimestamp(int i, Date v) {
    return setValue(i, codecFor(i, Date.class).serialize(v, protocolVersion));
  }

  @Override
  public T setTimestamp(String name, Date v) {
    for (int i : getAllIndexesOf(name)) {
      setTimestamp(i, v);
    }
    return wrapped;
  }

  @Override
  public T setDate(int i, LocalDate v) {
    return setValue(i, codecFor(i, LocalDate.class).serialize(v, protocolVersion));
  }

  @Override
  public T setDate(String name, LocalDate v) {
    for (int i : getAllIndexesOf(name)) {
      setDate(i, v);
    }
    return wrapped;
  }

  @Override
  public T setTime(int i, long v) {
    TypeCodec<Long> codec = codecFor(i, Long.class);
    ByteBuffer bb;
    if (codec instanceof TypeCodec.PrimitiveLongCodec)
      bb = ((TypeCodec.PrimitiveLongCodec) codec).serializeNoBoxing(v, protocolVersion);
    else bb = codec.serialize(v, protocolVersion);
    return setValue(i, bb);
  }

  @Override
  public T setTime(String name, long v) {
    for (int i : getAllIndexesOf(name)) {
      setTime(i, v);
    }
    return wrapped;
  }

  @Override
  public T setFloat(int i, float v) {
    TypeCodec<Float> codec = codecFor(i, Float.class);
    ByteBuffer bb;
    if (codec instanceof TypeCodec.PrimitiveFloatCodec)
      bb = ((TypeCodec.PrimitiveFloatCodec) codec).serializeNoBoxing(v, protocolVersion);
    else bb = codec.serialize(v, protocolVersion);
    return setValue(i, bb);
  }

  @Override
  public T setFloat(String name, float v) {
    for (int i : getAllIndexesOf(name)) {
      setFloat(i, v);
    }
    return wrapped;
  }

  @Override
  public T setDouble(int i, double v) {
    TypeCodec<Double> codec = codecFor(i, Double.class);
    ByteBuffer bb;
    if (codec instanceof TypeCodec.PrimitiveDoubleCodec)
      bb = ((TypeCodec.PrimitiveDoubleCodec) codec).serializeNoBoxing(v, protocolVersion);
    else bb = codec.serialize(v, protocolVersion);
    return setValue(i, bb);
  }

  @Override
  public T setDouble(String name, double v) {
    for (int i : getAllIndexesOf(name)) {
      setDouble(i, v);
    }
    return wrapped;
  }

  @Override
  public T setString(int i, String v) {
    return setValue(i, codecFor(i, String.class).serialize(v, protocolVersion));
  }

  @Override
  public T setString(String name, String v) {
    for (int i : getAllIndexesOf(name)) {
      setString(i, v);
    }
    return wrapped;
  }

  @Override
  public T setBytes(int i, ByteBuffer v) {
    return setValue(i, codecFor(i, ByteBuffer.class).serialize(v, protocolVersion));
  }

  @Override
  public T setBytes(String name, ByteBuffer v) {
    for (int i : getAllIndexesOf(name)) {
      setBytes(i, v);
    }
    return wrapped;
  }

  @Override
  public T setBytesUnsafe(int i, ByteBuffer v) {
    return setValue(i, v == null ? null : v.duplicate());
  }

  @Override
  public T setBytesUnsafe(String name, ByteBuffer v) {
    ByteBuffer value = v == null ? null : v.duplicate();
    for (int i : getAllIndexesOf(name)) {
      setValue(i, value);
    }
    return wrapped;
  }

  @Override
  public T setVarint(int i, BigInteger v) {
    return setValue(i, codecFor(i, BigInteger.class).serialize(v, protocolVersion));
  }

  @Override
  public T setVarint(String name, BigInteger v) {
    for (int i : getAllIndexesOf(name)) {
      setVarint(i, v);
    }
    return wrapped;
  }

  @Override
  public T setDecimal(int i, BigDecimal v) {
    return setValue(i, codecFor(i, BigDecimal.class).serialize(v, protocolVersion));
  }

  @Override
  public T setDecimal(String name, BigDecimal v) {
    for (int i : getAllIndexesOf(name)) {
      setDecimal(i, v);
    }
    return wrapped;
  }

  @Override
  public T setUUID(int i, UUID v) {
    return setValue(i, codecFor(i, UUID.class).serialize(v, protocolVersion));
  }

  @Override
  public T setUUID(String name, UUID v) {
    for (int i : getAllIndexesOf(name)) {
      setUUID(i, v);
    }
    return wrapped;
  }

  @Override
  public T setInet(int i, InetAddress v) {
    return setValue(i, codecFor(i, InetAddress.class).serialize(v, protocolVersion));
  }

  @Override
  public T setInet(String name, InetAddress v) {
    for (int i : getAllIndexesOf(name)) {
      setInet(i, v);
    }
    return wrapped;
  }

  // setToken is package-private because we only want to expose it in BoundStatement
  T setToken(int i, Token v) {
    if (v == null)
      throw new NullPointerException(
          String.format("Cannot set a null token for column %s", getName(i)));
    checkType(i, v.getType().getName());
    // Bypass CodecRegistry when serializing tokens
    return setValue(i, v.serialize(protocolVersion));
  }

  T setToken(String name, Token v) {
    for (int i : getAllIndexesOf(name)) {
      setToken(i, v);
    }
    return wrapped;
  }

  @Override
  @SuppressWarnings("unchecked")
  public <E> T setList(int i, List<E> v) {
    return setValue(i, codecFor(i).serialize(v, protocolVersion));
  }

  @Override
  public <E> T setList(int i, List<E> v, Class<E> elementsClass) {
    return setValue(i, codecFor(i, TypeTokens.listOf(elementsClass)).serialize(v, protocolVersion));
  }

  @Override
  public <E> T setList(int i, List<E> v, TypeToken<E> elementsType) {
    return setValue(i, codecFor(i, TypeTokens.listOf(elementsType)).serialize(v, protocolVersion));
  }

  @Override
  public <E> T setList(String name, List<E> v) {
    for (int i : getAllIndexesOf(name)) {
      setList(i, v);
    }
    return wrapped;
  }

  @Override
  public <E> T setList(String name, List<E> v, Class<E> elementsClass) {
    for (int i : getAllIndexesOf(name)) {
      setList(i, v, elementsClass);
    }
    return wrapped;
  }

  @Override
  public <E> T setList(String name, List<E> v, TypeToken<E> elementsType) {
    for (int i : getAllIndexesOf(name)) {
      setList(i, v, elementsType);
    }
    return wrapped;
  }

  @SuppressWarnings("unchecked")
  @Override
  public <K, V> T setMap(int i, Map<K, V> v) {
    return setValue(i, codecFor(i).serialize(v, protocolVersion));
  }

  @Override
  public <K, V> T setMap(int i, Map<K, V> v, Class<K> keysClass, Class<V> valuesClass) {
    return setValue(
        i, codecFor(i, TypeTokens.mapOf(keysClass, valuesClass)).serialize(v, protocolVersion));
  }

  @Override
  public <K, V> T setMap(int i, Map<K, V> v, TypeToken<K> keysType, TypeToken<V> valuesType) {
    return setValue(
        i, codecFor(i, TypeTokens.mapOf(keysType, valuesType)).serialize(v, protocolVersion));
  }

  @Override
  public <K, V> T setMap(String name, Map<K, V> v) {
    for (int i : getAllIndexesOf(name)) {
      setMap(i, v);
    }
    return wrapped;
  }

  @Override
  public <K, V> T setMap(String name, Map<K, V> v, Class<K> keysClass, Class<V> valuesClass) {
    for (int i : getAllIndexesOf(name)) {
      setMap(i, v, keysClass, valuesClass);
    }
    return wrapped;
  }

  @Override
  public <K, V> T setMap(String name, Map<K, V> v, TypeToken<K> keysType, TypeToken<V> valuesType) {
    for (int i : getAllIndexesOf(name)) {
      setMap(i, v, keysType, valuesType);
    }
    return wrapped;
  }

  @Override
  @SuppressWarnings("unchecked")
  public <E> T setSet(int i, Set<E> v) {
    return setValue(i, codecFor(i).serialize(v, protocolVersion));
  }

  @Override
  public <E> T setSet(int i, Set<E> v, Class<E> elementsClass) {
    return setValue(i, codecFor(i, TypeTokens.setOf(elementsClass)).serialize(v, protocolVersion));
  }

  @Override
  public <E> T setSet(int i, Set<E> v, TypeToken<E> elementsType) {
    return setValue(i, codecFor(i, TypeTokens.setOf(elementsType)).serialize(v, protocolVersion));
  }

  @Override
  public <E> T setSet(String name, Set<E> v) {
    for (int i : getAllIndexesOf(name)) {
      setSet(i, v);
    }
    return wrapped;
  }

  @Override
  public <E> T setSet(String name, Set<E> v, Class<E> elementsClass) {
    for (int i : getAllIndexesOf(name)) {
      setSet(i, v, elementsClass);
    }
    return wrapped;
  }

  @Override
  public <E> T setSet(String name, Set<E> v, TypeToken<E> elementsType) {
    for (int i : getAllIndexesOf(name)) {
      setSet(i, v, elementsType);
    }
    return wrapped;
  }

  @Override
  public T setUDTValue(int i, UDTValue v) {
    return setValue(i, codecFor(i, UDTValue.class).serialize(v, protocolVersion));
  }

  @Override
  public T setUDTValue(String name, UDTValue v) {
    for (int i : getAllIndexesOf(name)) {
      setUDTValue(i, v);
    }
    return wrapped;
  }

  @Override
  public T setTupleValue(int i, TupleValue v) {
    return setValue(i, codecFor(i, TupleValue.class).serialize(v, protocolVersion));
  }

  @Override
  public T setTupleValue(String name, TupleValue v) {
    for (int i : getAllIndexesOf(name)) {
      setTupleValue(i, v);
    }
    return wrapped;
  }

  @Override
  public <V> T set(int i, V v, Class<V> targetClass) {
    return set(i, v, codecFor(i, targetClass));
  }

  @Override
  public <V> T set(String name, V v, Class<V> targetClass) {
    for (int i : getAllIndexesOf(name)) {
      set(i, v, targetClass);
    }
    return wrapped;
  }

  @Override
  public <V> T set(int i, V v, TypeToken<V> targetType) {
    return set(i, v, codecFor(i, targetType));
  }

  @Override
  public <V> T set(String name, V v, TypeToken<V> targetType) {
    for (int i : getAllIndexesOf(name)) {
      set(i, v, targetType);
    }
    return wrapped;
  }

  @Override
  public <V> T set(int i, V v, TypeCodec<V> codec) {
    checkType(i, codec.getCqlType().getName());
    return setValue(i, codec.serialize(v, protocolVersion));
  }

  @Override
  public <V> T set(String name, V v, TypeCodec<V> codec) {
    for (int i : getAllIndexesOf(name)) {
      set(i, v, codec);
    }
    return wrapped;
  }

  @Override
  public T setToNull(int i) {
    return setValue(i, null);
  }

  @Override
  public T setToNull(String name) {
    for (int i : getAllIndexesOf(name)) {
      setToNull(i);
    }
    return wrapped;
  }

  @Override
  public boolean equals(Object o) {
    if (!(o instanceof AbstractData)) return false;

    AbstractData<?> that = (AbstractData<?>) o;
    if (values.length != that.values.length) return false;

    if (this.protocolVersion != that.protocolVersion) return false;

    // Deserializing each value is slightly inefficient, but comparing
    // the bytes could in theory be wrong (for varint for instance, 2 values
    // can have different binary representation but be the same value due to
    // leading zeros). So we don't take any risk.
    for (int i = 0; i < values.length; i++) {
      DataType thisType = getType(i);
      DataType thatType = that.getType(i);
      if (!thisType.equals(thatType)) return false;

      Object thisValue = this.codecFor(i).deserialize(this.values[i], this.protocolVersion);
      Object thatValue = that.codecFor(i).deserialize(that.values[i], that.protocolVersion);
      if (!MoreObjects.equal(thisValue, thatValue)) return false;
    }
    return true;
  }

  @Override
  public int hashCode() {
    // Same as equals
    int hash = 31;
    for (int i = 0; i < values.length; i++)
      hash +=
          values[i] == null ? 1 : codecFor(i).deserialize(values[i], protocolVersion).hashCode();
    return hash;
  }
}
