/**
 *
 * Copyright (c) 2006-2017, Speedment, Inc. All Rights Reserved.
 *
 * 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 com.speedment.runtime.field.internal.predicate;

import com.speedment.common.tuple.Tuple;
import com.speedment.runtime.config.identifier.ColumnIdentifier;
import com.speedment.runtime.field.Field;
import com.speedment.runtime.field.internal.util.Cast;
import com.speedment.runtime.field.predicate.FieldPredicate;
import com.speedment.runtime.field.predicate.PredicateType;
import static java.util.Objects.requireNonNull;
import java.util.function.Predicate;

/**
 * A predicate that contains meta-data about the {@link Field} that was used to
 * construct it.
 *
 * @param <ENTITY> the entity type that is being tested
 * @param <V> the wrapper type
 * @param <FIELD> the field in the entity that is operated on
 *
 * @author Emil Forslund
 * @since 3.0.0
 */
public abstract class AbstractFieldPredicate<ENTITY, V, FIELD extends Field<ENTITY>>
    extends AbstractPredicate<ENTITY> implements FieldPredicate<ENTITY> {

    private final PredicateType predicateType;
    private final FIELD field;
    private final Predicate<ENTITY> tester;

    protected AbstractFieldPredicate(
        final PredicateType predicateType,
        final FIELD field,
        final Predicate<ENTITY> tester,
        final boolean negated
    ) {
        super(negated);
        this.predicateType = requireNonNull(predicateType);
        this.field = requireNonNull(field);
        this.tester = requireNonNull(tester);
    }

    @Override
    protected boolean testWithoutNegation(ENTITY instance) {
        return tester.test(instance);
    }

    @Override
    public final PredicateType getPredicateType() {
        return predicateType;
    }

    @Override
    public final PredicateType getEffectivePredicateType() {
        return isNegated() ? predicateType.negate() : predicateType;
    }

    @Override
    public final FIELD getField() {
        return field;
    }

    @Override
    public FieldPredicate<ENTITY> negate() {
        return (FieldPredicate<ENTITY>) super.negate();
    }

    @Override
    public String toString() {
        final ColumnIdentifier<ENTITY> cId = field.identifier();
        final StringBuilder sb = new StringBuilder();
        sb.append(getClass().getSimpleName())
            .append(" {")
            .append("field: ")
            .append(cId.getDbmsName()).append('.')
            .append(cId.getSchemaName()).append('.')
            .append(cId.getTableName()).append('.')
            .append(cId.getColumnName())
            .append(", type: '").append(predicateType).append("'");

        Cast.cast(this, Tuple.class)
            .ifPresent(tuple -> {
                for (int i = 0; i < tuple.length(); i++) {
                    sb.append(", operand ").append(i).append(": ").append(tuple.get(i));
                }
            });

        sb.append(", negated: ").append(isNegated())
            .append("}");
        return sb.toString();
    }
}