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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.relational;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.base.Joiner;
import com.google.common.collect.ImmutableList;
import io.trino.metadata.ResolvedFunction;
import io.trino.spi.type.Type;

import java.util.List;
import java.util.Objects;

import static java.util.Objects.requireNonNull;

public final class CallExpression
        extends RowExpression
{
    private final ResolvedFunction resolvedFunction;
    private final List arguments;

    @JsonCreator
    public CallExpression(
            @JsonProperty ResolvedFunction resolvedFunction,
            @JsonProperty List arguments)
    {
        requireNonNull(resolvedFunction, "resolvedFunction is null");
        requireNonNull(arguments, "arguments is null");

        this.resolvedFunction = resolvedFunction;
        this.arguments = ImmutableList.copyOf(arguments);
    }

    @JsonProperty
    public ResolvedFunction getResolvedFunction()
    {
        return resolvedFunction;
    }

    @Override
    public Type getType()
    {
        return resolvedFunction.getSignature().getReturnType();
    }

    @JsonProperty
    public List getArguments()
    {
        return arguments;
    }

    @Override
    public String toString()
    {
        return resolvedFunction.getSignature().getName() + "(" + Joiner.on(", ").join(arguments) + ")";
    }

    @Override
    public boolean equals(Object o)
    {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        CallExpression that = (CallExpression) o;
        return Objects.equals(resolvedFunction, that.resolvedFunction) &&
                Objects.equals(arguments, that.arguments);
    }

    @Override
    public int hashCode()
    {
        return Objects.hash(resolvedFunction, arguments);
    }

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