/*
 * Copyright © 2017 Orange, 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.transportpce.servicehandler.validation.checks;

import org.opendaylight.transportpce.servicehandler.ServiceEndpointType;
import org.opendaylight.yang.gen.v1.http.org.openroadm.common.service.types.rev230526.ServiceEndpoint;
import org.opendaylight.yang.gen.v1.http.org.openroadm.service.format.rev191129.ServiceFormat;

/**
 * Class for checking missing info on Tx/Rx for A/Z end.
 *
 */
public final class ServicehandlerTxRxCheck {

    // This is class is public so that these messages can be accessed from Junit (avoid duplications).
    public static final class LogMessages {

        private static final String SERVICE = "Service ";
        public static final String TXRXDIR_NOT_SET;
        public static final String TXDIR_PORT_NOT_SET;
        public static final String TXDIR_LGX_NOT_SET;
        public static final String RXDIR_PORT_NOT_SET;
        public static final String RXDIR_LGX_NOT_SET;

        // Static blocks are generated once and spare memory.
        static {
            TXRXDIR_NOT_SET = "Service TxDirection or RxDirection is not correctly set";
            TXDIR_PORT_NOT_SET = "Service TxDirection Port is not correctly set";
            TXDIR_LGX_NOT_SET = "Service TxDirection Lgx is not correctly set";
            RXDIR_PORT_NOT_SET = "Service RxDirection Port is not correctly set";
            RXDIR_LGX_NOT_SET = "Service RxDirection Lgx is not correctly set";
        }

        public static String endpointTypeNotSet(ServiceEndpointType endpointType) {
            return SERVICE + endpointType + " is not set";
        }

        public static String rateNull(ServiceEndpointType endpointType) {
            return "Something wrong when accessing " + SERVICE + endpointType + " rate, format or clli";
        }

        public static String rateNotSet(ServiceEndpointType endpointType) {
            return SERVICE + endpointType + " rate is not set";
        }

        public static String formatNotSet(ServiceEndpointType endpointType) {
            return SERVICE + endpointType + " format is not set";
        }

        public static String clliNotSet(ServiceEndpointType endpointType) {
            return SERVICE + endpointType + " clli is not set";
        }

        private LogMessages() {
        }
    }

    /**
     * Check if a String is not null and not equal to ''.
     *
     * @param value
     *            String value
     * @return true if String ok false if not
     */
    public static boolean checkString(String value) {
        return (value != null && !value.isEmpty());
    }

    /**
     * Check Compliance of Service TxRx info.
     * @param serviceEnd Service Endpoint
     * @param endpointType Endpoint type
     *
     * @return true if String ok false if not
     */
    public static ComplianceCheckResult check(ServiceEndpoint serviceEnd, ServiceEndpointType endpointType) {
        if (serviceEnd == null) {
            return new ComplianceCheckResult(false, LogMessages.endpointTypeNotSet(endpointType));
        }

        if (serviceEnd.getServiceRate() == null) {
            String message = "Something wrong when accessing Service " + endpointType + " rate, format or clli";
            return new ComplianceCheckResult(false, message);
        }
        Long serviceRate = serviceEnd.getServiceRate().toJava();
        ServiceFormat serviceformat = serviceEnd.getServiceFormat();
        String clli = serviceEnd.getClli();
        if (serviceRate <= 0) {
            return new ComplianceCheckResult(false, LogMessages.rateNotSet(endpointType));
        }
        if (serviceformat == null) {
            return new ComplianceCheckResult(false, LogMessages.formatNotSet(endpointType));
        }
        if (!checkString(clli)) {
            return new ComplianceCheckResult(false, LogMessages.clliNotSet(endpointType));
        }
        if (serviceEnd.getTxDirection() == null || serviceEnd.getRxDirection() == null) {
            return new ComplianceCheckResult(false, LogMessages.TXRXDIR_NOT_SET);
        }
        return new ComplianceCheckResult(true, "");
    }

    private ServicehandlerTxRxCheck() {
    }

}