/*
 *  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.directory.api.ldap.model.message;


import org.apache.directory.api.ldap.model.name.Dn;


/**
 * The LdapResult implementation. RFC 4511 definition for a LdapResult is given below. <br>
 * 
 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
 */
public class LdapResultImpl implements LdapResult
{
    /** Lowest matched entry Dn - defaults to empty string */
    private Dn matchedDn;

    /** Referral associated with this LdapResult if the errorCode is REFERRAL */
    private Referral referral;

    /** Decriptive diagnostic message - defaults to empty string */
    private String diagnosticMessage;

    /** Resultant operation error code - defaults to SUCCESS */
    private ResultCodeEnum resultCode = ResultCodeEnum.SUCCESS;

    /** A flag set when the LdapResult is a SUCESS with no additional information */
    private boolean isDefaultSuccess = true;


    // ------------------------------------------------------------------------
    // LdapResult Interface Method Implementations
    // ------------------------------------------------------------------------
    /**
     * {@inheritDoc}
     */
    @Override
    public String getDiagnosticMessage()
    {
        return diagnosticMessage;
    }


    /**
     * {@inheritDoc}
     */
    @Override
    public void setDiagnosticMessage( String diagnosticMessage )
    {
        this.diagnosticMessage = diagnosticMessage;
        isDefaultSuccess = false;
    }


    /**
     * {@inheritDoc}
     */
    @Override
    public Dn getMatchedDn()
    {
        return matchedDn;
    }


    /**
     * {@inheritDoc}
     */
    @Override
    public void setMatchedDn( Dn matchedDn )
    {
        this.matchedDn = matchedDn;
        isDefaultSuccess = false;
    }


    /**
     * {@inheritDoc}
     */
    @Override
    public ResultCodeEnum getResultCode()
    {
        return resultCode;
    }


    /**
     * {@inheritDoc}
     */
    @Override
    public void setResultCode( ResultCodeEnum resultCode )
    {
        this.resultCode = resultCode;

        isDefaultSuccess = isDefaultSuccess && ( resultCode == ResultCodeEnum.SUCCESS );
    }


    /**
     * {@inheritDoc}
     */
    @Override
    public Referral getReferral()
    {
        return referral;
    }


    /**
     * {@inheritDoc}
     */
    @Override
    public boolean isReferral()
    {
        return referral != null;
    }


    /**
     * {@inheritDoc}
     */
    @Override
    public void setReferral( Referral referral )
    {
        this.referral = referral;
        isDefaultSuccess = false;
    }


    /**
     * {@inheritDoc}
     */
    @Override
    public boolean isDefaultSuccess()
    {
        return isDefaultSuccess;
    }


    /**
     * @see Object#hashCode()
     * @return the instance's hash code 
     */
    @Override
    public int hashCode()
    {
        int hash = 37;

        if ( referral != null )
        {
            hash = hash * 17 + referral.hashCode();
        }

        hash = hash * 17 + resultCode.hashCode();

        if ( diagnosticMessage != null )
        {
            hash = hash * 17 + diagnosticMessage.hashCode();
        }

        if ( matchedDn != null )
        {
            hash = hash * 17 + matchedDn.hashCode();
        }

        return hash;
    }


    /**
     * @param obj The object to compare with
     * @return <code>true</code> if both objects are equals
     */
    @Override
    public boolean equals( Object obj )
    {
        // quickly return true if this is the obj
        if ( obj == this )
        {
            return true;
        }

        // return false if object does not implement interface
        if ( !( obj instanceof LdapResult ) )
        {
            return false;
        }

        // compare all the like elements of the two LdapResult objects
        LdapResult result = ( LdapResult ) obj;

        if ( referral == null && result.getReferral() != null )
        {
            return false;
        }

        if ( result.getReferral() == null && referral != null )
        {
            return false;
        }

        if ( referral != null && result.getReferral() != null && !referral.equals( result.getReferral() ) )
        {
            return false;
        }

        if ( !resultCode.equals( result.getResultCode() ) )
        {
            return false;
        }

        // Handle diagnostic Messages where "" is considered equivalent to null
        String errMsg0 = diagnosticMessage;
        String errMsg1 = result.getDiagnosticMessage();

        if ( errMsg0 == null )
        {
            errMsg0 = "";
        }

        if ( errMsg1 == null )
        {
            errMsg1 = "";
        }

        if ( !errMsg0.equals( errMsg1 ) )
        {
            return false;
        }

        if ( matchedDn != null )
        {
            if ( !matchedDn.equals( result.getMatchedDn() ) )
            {
                return false;
            }
        }
        // one is null other is not
        else if ( result.getMatchedDn() != null )
        {
            return false;
        }

        return true;
    }


    /**
     * Get a String representation of a LdapResult
     * 
     * @return A LdapResult String
     */
    @Override
    public String toString()
    {
        StringBuilder sb = new StringBuilder();

        sb.append( "        Ldap Result\n" );
        sb.append( "            Result code : (" ).append( resultCode ).append( ')' );

        switch ( resultCode )
        {

            case SUCCESS:
                sb.append( " success\n" );
                break;

            case OPERATIONS_ERROR:
                sb.append( " operationsError\n" );
                break;

            case PROTOCOL_ERROR:
                sb.append( " protocolError\n" );
                break;

            case TIME_LIMIT_EXCEEDED:
                sb.append( " timeLimitExceeded\n" );
                break;

            case SIZE_LIMIT_EXCEEDED:
                sb.append( " sizeLimitExceeded\n" );
                break;

            case COMPARE_FALSE:
                sb.append( " compareFalse\n" );
                break;

            case COMPARE_TRUE:
                sb.append( " compareTrue\n" );
                break;

            case AUTH_METHOD_NOT_SUPPORTED:
                sb.append( " authMethodNotSupported\n" );
                break;

            case STRONG_AUTH_REQUIRED:
                sb.append( " strongAuthRequired\n" );
                break;

            case REFERRAL:
                sb.append( " referral -- new\n" );
                break;

            case ADMIN_LIMIT_EXCEEDED:
                sb.append( " adminLimitExceeded -- new\n" );
                break;

            case UNAVAILABLE_CRITICAL_EXTENSION:
                sb.append( " unavailableCriticalExtension -- new\n" );
                break;

            case CONFIDENTIALITY_REQUIRED:
                sb.append( " confidentialityRequired -- new\n" );
                break;

            case SASL_BIND_IN_PROGRESS:
                sb.append( " saslBindInProgress -- new\n" );
                break;

            case NO_SUCH_ATTRIBUTE:
                sb.append( " noSuchAttribute\n" );
                break;

            case UNDEFINED_ATTRIBUTE_TYPE:
                sb.append( " undefinedAttributeType\n" );
                break;

            case INAPPROPRIATE_MATCHING:
                sb.append( " inappropriateMatching\n" );
                break;

            case CONSTRAINT_VIOLATION:
                sb.append( " constraintViolation\n" );
                break;

            case ATTRIBUTE_OR_VALUE_EXISTS:
                sb.append( " attributeOrValueExists\n" );
                break;

            case INVALID_ATTRIBUTE_SYNTAX:
                sb.append( " invalidAttributeSyntax\n" );
                break;

            case NO_SUCH_OBJECT:
                sb.append( " noSuchObject\n" );
                break;

            case ALIAS_PROBLEM:
                sb.append( " aliasProblem\n" );
                break;

            case INVALID_DN_SYNTAX:
                sb.append( " invalidDNSyntax\n" );
                break;

            case ALIAS_DEREFERENCING_PROBLEM:
                sb.append( " aliasDereferencingProblem\n" );
                break;

            case INAPPROPRIATE_AUTHENTICATION:
                sb.append( " inappropriateAuthentication\n" );
                break;

            case INVALID_CREDENTIALS:
                sb.append( " invalidCredentials\n" );
                break;

            case INSUFFICIENT_ACCESS_RIGHTS:
                sb.append( " insufficientAccessRights\n" );
                break;

            case BUSY:
                sb.append( " busy\n" );
                break;

            case UNAVAILABLE:
                sb.append( " unavailable\n" );
                break;

            case UNWILLING_TO_PERFORM:
                sb.append( " unwillingToPerform\n" );
                break;

            case LOOP_DETECT:
                sb.append( " loopDetect\n" );
                break;

            case NAMING_VIOLATION:
                sb.append( " namingViolation\n" );
                break;

            case OBJECT_CLASS_VIOLATION:
                sb.append( " objectClassViolation\n" );
                break;

            case NOT_ALLOWED_ON_NON_LEAF:
                sb.append( " notAllowedOnNonLeaf\n" );
                break;

            case NOT_ALLOWED_ON_RDN:
                sb.append( " notAllowedOnRDN\n" );
                break;

            case ENTRY_ALREADY_EXISTS:
                sb.append( " entryAlreadyExists\n" );
                break;

            case OBJECT_CLASS_MODS_PROHIBITED:
                sb.append( " objectClassModsProhibited\n" );
                break;

            case AFFECTS_MULTIPLE_DSAS:
                sb.append( " affectsMultipleDSAs -- new\n" );
                break;

            case E_SYNC_REFRESH_REQUIRED:
                sb.append( " eSyncRefreshRequired\n" );
                break;

            case OTHER:
                sb.append( " other\n" );
                break;

            default:
                switch ( resultCode.getResultCode() )
                {
                    case 9:
                        sb.append( " -- 9 reserved --\n" );
                        break;

                    case 22:
                    case 23:
                    case 24:
                    case 25:
                    case 26:
                    case 27:
                    case 28:
                    case 29:
                    case 30:
                    case 31:
                        sb.append( " -- 22-31 unused --\n" );
                        break;

                    case 35:
                        sb.append( " -- 35 reserved for undefined isLeaf --\n" );
                        break;

                    case 37:
                    case 38:
                    case 39:
                    case 40:
                    case 41:
                    case 42:
                    case 43:
                    case 44:
                    case 45:
                    case 46:
                    case 47:
                        sb.append( " -- 37-47 unused --\n" );
                        break;

                    case 55:
                    case 56:
                    case 57:
                    case 58:
                    case 59:
                    case 60:
                    case 61:
                    case 62:
                    case 63:
                        sb.append( " -- 55-63 unused --\n" );
                        break;

                    case 70:
                        sb.append( " -- 70 reserved for CLDAP --\n" );
                        break;

                    case 72:
                    case 73:
                    case 74:
                    case 75:
                    case 76:
                    case 77:
                    case 78:
                    case 79:
                        sb.append( " -- 72-79 unused --\n" );
                        break;

                    case 81:
                    case 82:
                    case 83:
                    case 84:
                    case 85:
                    case 86:
                    case 87:
                    case 88:
                    case 89:
                    case 90:
                        sb.append( " -- 81-90 reserved for APIs --" );
                        break;

                    default:
                        sb.append( "Unknown error code : " ).append( resultCode );
                        break;
                }
        }

        sb.append( "            Matched Dn : '" ).append( matchedDn ).append( "'\n" );
        sb.append( "            Diagnostic message : '" ).append( diagnosticMessage ).append( "'\n" );

        if ( referral != null )
        {
            sb.append( "            Referrals :\n" );

            sb.append( "                Referral :" ).append( referral.toString() ).append( '\n' );
        }

        return sb.toString();
    }
}