/*
 *  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.ahc.auth;

import org.apache.ahc.util.LangUtils;

/**
 * {@link Credentials} for use with the NTLM authentication scheme which requires additional
 * information.
 *
 * @author <a href="mailto:adrian@ephox.com">Adrian Sutton</a>
 * @author <a href="mailto:mbowler@GargoyleSoftware.com">Mike Bowler</a>
 */
public class NTCredentials extends UsernamePasswordCredentials {
    // ----------------------------------------------------- Instance Variables

    /**
     * The Domain to authenticate with.
     */
    private String domain;

    /**
     * The host the authentication request is originating from.
     */
    private String host;

    // ----------------------------------------------------------- Constructors

    /**
     * Default constructor.
     *
     * @deprecated Do not use. Null user name, domain & host no longer allowed
     */
    public NTCredentials() {
        super();
    }

    /**
     * Constructor.
     *
     * @param userName The user name.  This should not include the domain to authenticate with.
     *                 For example: "user" is correct whereas "DOMAIN\\user" is not.
     * @param password The password.
     * @param host     The host the authentication request is originating from.  Essentially, the
     *                 computer name for this machine.
     * @param domain   The domain to authenticate within.
     */
    public NTCredentials(String userName, String password, String host,
                         String domain) {
        super(userName, password);
        if (domain == null) {
            throw new IllegalArgumentException("Domain may not be null");
        }
        this.domain = domain;
        if (host == null) {
            throw new IllegalArgumentException("Host may not be null");
        }
        this.host = host;
    }
    // ------------------------------------------------------- Instance Methods


    /**
     * Sets the domain to authenticate with. The domain may not be null.
     *
     * @param domain the NT domain to authenticate in.
     * @see #getDomain()
     * @deprecated Do not use. The NTCredentials objects should be immutable
     */
    public void setDomain(String domain) {
        if (domain == null) {
            throw new IllegalArgumentException("Domain may not be null");
        }
        this.domain = domain;
    }

    /**
     * Retrieves the name to authenticate with.
     *
     * @return String the domain these credentials are intended to authenticate with.
     * @see #setDomain(String)
     */
    public String getDomain() {
        return domain;
    }

    /**
     * Sets the host name of the computer originating the request. The host name may
     * not be null.
     *
     * @param host the Host the user is logged into.
     * @deprecated Do not use. The NTCredentials objects should be immutable
     */
    public void setHost(String host) {
        if (host == null) {
            throw new IllegalArgumentException("Host may not be null");
        }
        this.host = host;
    }

    /**
     * Retrieves the host name of the computer originating the request.
     *
     * @return String the host the user is logged into.
     */
    public String getHost() {
        return this.host;
    }

    /**
     * Return a string representation of this object.
     *
     * @return A string represenation of this object.
     */
    public String toString() {
        final StringBuffer sbResult = new StringBuffer(super.toString());

        sbResult.append("@");
        sbResult.append(this.host);
        sbResult.append(".");
        sbResult.append(this.domain);

        return sbResult.toString();
    }

    /**
     * Computes a hash code based on all the case-sensitive parts of the credentials object.
     *
     * @return The hash code for the credentials.
     */
    public int hashCode() {
        int hash = super.hashCode();
        hash = LangUtils.hashCode(hash, this.host);
        hash = LangUtils.hashCode(hash, this.domain);
        return hash;
    }

    /**
     * Performs a case-sensitive check to see if the components of the credentials
     * are the same.
     *
     * @param o The object to match.
     * @return <code>true</code> if all of the credentials match.
     */
    public boolean equals(Object o) {
        if (o == null) {
            return false;
        }
        if (this == o) {
            return true;
        }
        if (super.equals(o)) {
            if (o instanceof NTCredentials) {
                NTCredentials that = (NTCredentials)o;

                return LangUtils.equals(this.domain, that.domain)
                    && LangUtils.equals(this.host, that.host);
            }
        }

        return false;
    }
}