/*
 * Copyright (c) 2015 Cisco Systems, Inc. and others.  All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */
package org.opendaylight.yangtools.yang.parser.stmt.rfc6020;

import com.google.common.base.Preconditions;
import com.google.common.collect.Range;
import org.opendaylight.yangtools.yang.model.api.YangStmtMapping;
import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
import org.opendaylight.yangtools.yang.model.api.stmt.FractionDigitsStatement;
import org.opendaylight.yangtools.yang.parser.spi.SubstatementValidator;
import org.opendaylight.yangtools.yang.parser.spi.meta.AbstractDeclaredStatement;
import org.opendaylight.yangtools.yang.parser.spi.meta.AbstractStatementSupport;
import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
import org.opendaylight.yangtools.yang.parser.stmt.rfc6020.effective.FractionDigitsEffectiveStatementImpl;

public class FractionDigitsStatementImpl extends AbstractDeclaredStatement<Integer> implements FractionDigitsStatement {
    private static final SubstatementValidator SUBSTATEMENT_VALIDATOR = SubstatementValidator.builder(YangStmtMapping
            .FRACTION_DIGITS)
            .build();

    private static final Range<Integer> FRAC_DIGITS_ALLOWED = Range.closed(1, 18);

    protected FractionDigitsStatementImpl(final StmtContext<Integer, FractionDigitsStatement, ?> context) {
        super(context);
    }

    public static class Definition extends AbstractStatementSupport<Integer, FractionDigitsStatement,
            EffectiveStatement<Integer, FractionDigitsStatement>> {

        public Definition() {
            super(YangStmtMapping.FRACTION_DIGITS);
        }

        @Override
        public Integer parseArgumentValue(final StmtContext<?, ?, ?> ctx, final String value) {

            int fractionDigits;

            try {
                fractionDigits = Integer.parseInt(value);
            } catch (NumberFormatException e) {
                throw new SourceException(String.format("%s is not valid fraction-digits integer argument",
                        value), ctx.getStatementSourceReference(), e);
            }

            Preconditions.checkArgument(FRAC_DIGITS_ALLOWED.contains(fractionDigits),
                "fraction-digits argument should be integer within %s", FRAC_DIGITS_ALLOWED);

            return fractionDigits;
        }

        @Override
        public FractionDigitsStatement createDeclared(final StmtContext<Integer, FractionDigitsStatement, ?> ctx) {
            return new FractionDigitsStatementImpl(ctx);
        }

        @Override
        public EffectiveStatement<Integer, FractionDigitsStatement> createEffective(
                final StmtContext<Integer, FractionDigitsStatement, EffectiveStatement<Integer, FractionDigitsStatement>> ctx) {
            return new FractionDigitsEffectiveStatementImpl(ctx);
        }

        @Override
        protected SubstatementValidator getSubstatementValidator() {
            return SUBSTATEMENT_VALIDATOR;
        }
    }

    @Override
    public int getValue() {
        return argument();
    }
}