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/*
 * 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 io.trino.sql.planner.plan;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.collect.ImmutableList;
import com.google.errorprone.annotations.Immutable;
import io.trino.operator.RetryPolicy;
import io.trino.sql.planner.OrderingScheme;
import io.trino.sql.planner.Symbol;

import java.util.List;
import java.util.Optional;

import static com.google.common.base.Preconditions.checkArgument;
import static java.util.Objects.requireNonNull;

@Immutable
public class RemoteSourceNode
        extends PlanNode
{
    private final List sourceFragmentIds;
    private final List outputs;
    private final Optional orderingScheme;
    private final ExchangeNode.Type exchangeType; // This is needed to "unfragment" to compute stats correctly.
    private final RetryPolicy retryPolicy;

    @JsonCreator
    public RemoteSourceNode(
            @JsonProperty("id") PlanNodeId id,
            @JsonProperty("sourceFragmentIds") List sourceFragmentIds,
            @JsonProperty("outputs") List outputs,
            @JsonProperty("orderingScheme") Optional orderingScheme,
            @JsonProperty("exchangeType") ExchangeNode.Type exchangeType,
            @JsonProperty("retryPolicy") RetryPolicy retryPolicy)
    {
        super(id);

        requireNonNull(outputs, "outputs is null");

        this.sourceFragmentIds = sourceFragmentIds;
        this.outputs = ImmutableList.copyOf(outputs);
        this.orderingScheme = requireNonNull(orderingScheme, "orderingScheme is null");
        this.exchangeType = requireNonNull(exchangeType, "exchangeType is null");
        this.retryPolicy = requireNonNull(retryPolicy, "retryPolicy is null");
    }

    public RemoteSourceNode(
            PlanNodeId id,
            PlanFragmentId sourceFragmentId,
            List outputs,
            Optional orderingScheme,
            ExchangeNode.Type exchangeType,
            RetryPolicy retryPolicy)
    {
        this(id, ImmutableList.of(sourceFragmentId), outputs, orderingScheme, exchangeType, retryPolicy);
    }

    @Override
    public List getSources()
    {
        return ImmutableList.of();
    }

    @Override
    @JsonProperty("outputs")
    public List getOutputSymbols()
    {
        return outputs;
    }

    @JsonProperty("sourceFragmentIds")
    public List getSourceFragmentIds()
    {
        return sourceFragmentIds;
    }

    @JsonProperty("orderingScheme")
    public Optional getOrderingScheme()
    {
        return orderingScheme;
    }

    @JsonProperty("exchangeType")
    public ExchangeNode.Type getExchangeType()
    {
        return exchangeType;
    }

    @JsonProperty("retryPolicy")
    public RetryPolicy getRetryPolicy()
    {
        return retryPolicy;
    }

    @Override
    public  R accept(PlanVisitor visitor, C context)
    {
        return visitor.visitRemoteSource(this, context);
    }

    @Override
    public PlanNode replaceChildren(List newChildren)
    {
        checkArgument(newChildren.isEmpty(), "newChildren is not empty");
        return this;
    }

    public RemoteSourceNode withSourceFragmentIds(List sourceFragmentIds)
    {
        return new RemoteSourceNode(
                this.getId(),
                sourceFragmentIds,
                this.getOutputSymbols(),
                this.getOrderingScheme(),
                this.getExchangeType(),
                this.getRetryPolicy());
    }
}