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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.spi.function;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import io.trino.spi.Experimental;

import java.util.Objects;

import static java.util.Locale.ROOT;

@Experimental(eta = "2022-10-31")
public final class SchemaFunctionName
{
    private final String schemaName;
    private final String functionName;

    @JsonCreator
    public SchemaFunctionName(@JsonProperty("schemaName") String schemaName, @JsonProperty("functionName") String functionName)
    {
        this.schemaName = schemaName.toLowerCase(ROOT);
        if (schemaName.isEmpty()) {
            throw new IllegalArgumentException("schemaName is empty");
        }
        this.functionName = functionName.toLowerCase(ROOT);
        if (functionName.isEmpty()) {
            throw new IllegalArgumentException("functionName is empty");
        }
    }

    @JsonProperty
    public String getSchemaName()
    {
        return schemaName;
    }

    @JsonProperty
    public String getFunctionName()
    {
        return functionName;
    }

    @Override
    public int hashCode()
    {
        return Objects.hash(schemaName, functionName);
    }

    @Override
    public boolean equals(Object obj)
    {
        if (this == obj) {
            return true;
        }
        if (obj == null || getClass() != obj.getClass()) {
            return false;
        }
        SchemaFunctionName other = (SchemaFunctionName) obj;
        return Objects.equals(this.schemaName, other.schemaName) &&
                Objects.equals(this.functionName, other.functionName);
    }

    @Override
    public String toString()
    {
        return schemaName + '.' + functionName;
    }
}