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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;

import io.trino.metadata.Metadata;
import io.trino.metadata.ResolvedFunction;
import io.trino.spi.type.Type;
import io.trino.spi.type.TypeSignature;
import io.trino.sql.analyzer.TypeSignatureProvider;
import io.trino.sql.ir.Call;
import io.trino.sql.ir.Constant;
import io.trino.sql.ir.Expression;

import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;

import static java.util.Objects.requireNonNull;

public class BuiltinFunctionCallBuilder
{
    private final Metadata metadata;
    private String name;
    private List argumentTypes = new ArrayList<>();
    private List argumentValues = new ArrayList<>();

    public static BuiltinFunctionCallBuilder resolve(Metadata metadata)
    {
        return new BuiltinFunctionCallBuilder(metadata);
    }

    private BuiltinFunctionCallBuilder(Metadata metadata)
    {
        this.metadata = requireNonNull(metadata, "metadata is null");
    }

    public BuiltinFunctionCallBuilder setName(String name)
    {
        this.name = requireNonNull(name, "name is null");
        return this;
    }

    public BuiltinFunctionCallBuilder addArgument(Constant value)
    {
        requireNonNull(value, "value is null");
        return addArgument(value.type().getTypeSignature(), value);
    }

    public BuiltinFunctionCallBuilder addArgument(Type type, Expression value)
    {
        requireNonNull(type, "type is null");
        return addArgument(type.getTypeSignature(), value);
    }

    public BuiltinFunctionCallBuilder addArgument(TypeSignature typeSignature, Expression value)
    {
        requireNonNull(typeSignature, "typeSignature is null");
        requireNonNull(value, "value is null");
        argumentTypes.add(typeSignature);
        argumentValues.add(value);
        return this;
    }

    public BuiltinFunctionCallBuilder setArguments(List types, List values)
    {
        requireNonNull(types, "types is null");
        requireNonNull(values, "values is null");
        argumentTypes = types.stream()
                .map(Type::getTypeSignature)
                .collect(Collectors.toList());
        argumentValues = new ArrayList<>(values);
        return this;
    }

    public Call build()
    {
        ResolvedFunction resolvedFunction = metadata.resolveBuiltinFunction(name, TypeSignatureProvider.fromTypeSignatures(argumentTypes));
        return new Call(resolvedFunction, argumentValues);
    }
}