/*
 * 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.johnzon.jsonschema.spi.builtin;

import java.util.Optional;
import java.util.function.Function;
import java.util.stream.Stream;

import javax.json.JsonString;
import javax.json.JsonValue;
import javax.json.JsonValue.ValueType;

import org.apache.johnzon.jsonschema.ValidationResult.ValidationError;
import org.apache.johnzon.jsonschema.spi.ValidationContext;
import org.apache.johnzon.jsonschema.spi.ValidationExtension;

public class IntegerValidation implements ValidationExtension {

    @Override
    public Optional<Function<JsonValue, Stream<ValidationError>>> create(ValidationContext model) {
        final JsonValue type = model.getSchema().get("type");
        if (type.getValueType().equals(ValueType.STRING) && "integer".equals(JsonString.class.cast(type).getString())) {
            return Optional.of(new MultipleOfValidation.Impl(model.toPointer(), model.getValueProvider(), 1));
        }
        return Optional.empty();
    }

}
