/*
 * 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 org.apache.tuweni.eth;

import org.apache.tuweni.bytes.Bytes;
import org.apache.tuweni.units.bigints.UInt256;
import org.apache.tuweni.units.ethereum.Gas;

import java.io.IOException;
import java.time.Instant;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.fasterxml.jackson.databind.ser.std.StdSerializer;

public class EthJsonModule extends SimpleModule {

  static class HashSerializer extends StdSerializer<Hash> {

    HashSerializer() {
      super(Hash.class);
    }

    @Override
    public void serialize(Hash value, JsonGenerator gen, SerializerProvider provider) throws IOException {
      gen.writeString(value.toHexString());
    }
  }

  static class AddressSerializer extends StdSerializer<Address> {

    AddressSerializer() {
      super(Address.class);
    }

    @Override
    public void serialize(Address value, JsonGenerator gen, SerializerProvider provider) throws IOException {
      gen.writeString(value.toHexString());
    }
  }

  static class BytesSerializer extends StdSerializer<Bytes> {

    BytesSerializer() {
      super(Bytes.class);
    }

    @Override
    public void serialize(Bytes value, JsonGenerator gen, SerializerProvider provider) throws IOException {
      gen.writeString(value.toHexString());
    }
  }

  static class GasSerializer extends StdSerializer<Gas> {

    GasSerializer() {
      super(Gas.class);
    }

    @Override
    public void serialize(Gas value, JsonGenerator gen, SerializerProvider provider) throws IOException {
      gen.writeString(value.toBytes().toHexString());
    }
  }

  static class UInt256Serializer extends StdSerializer<UInt256> {

    UInt256Serializer() {
      super(UInt256.class);
    }

    @Override
    public void serialize(UInt256 value, JsonGenerator gen, SerializerProvider provider) throws IOException {
      gen.writeString(value.toHexString());
    }
  }

  static class InstantSerializer extends StdSerializer<Instant> {

    InstantSerializer() {
      super(Instant.class);
    }

    @Override
    public void serialize(Instant value, JsonGenerator gen, SerializerProvider provider) throws IOException {
      gen.writeNumber(value.toEpochMilli());
    }
  }

  public EthJsonModule() {
    addSerializer(Hash.class, new HashSerializer());
    addSerializer(Address.class, new AddressSerializer());
    addSerializer(Bytes.class, new BytesSerializer());
    addSerializer(Gas.class, new GasSerializer());
    addSerializer(UInt256.class, new UInt256Serializer());
    addSerializer(Instant.class, new InstantSerializer());
  }
}