/*
 *  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;

public class UsernamePasswordCredentials implements Credentials{
        // ----------------------------------------------------------- Constructors

    /**
     * Default constructor.
     *
     * @deprecated Do not use. Null user name no longer allowed
     */
    public UsernamePasswordCredentials() {
        super();
    }


    /**
     * The constructor with the username and password combined string argument.
     *
     * @param usernamePassword the username:password formed string
     * @see #toString
     */
    public UsernamePasswordCredentials(String usernamePassword) {
        super();
        if (usernamePassword == null) {
            throw new IllegalArgumentException("Username:password string may not be null");
        }
        int atColon = usernamePassword.indexOf(':');
        if (atColon >= 0) {
            this.userName = usernamePassword.substring(0, atColon);
            this.password = usernamePassword.substring(atColon + 1);
        } else {
            this.userName = usernamePassword;
        }
    }


    /**
     * The constructor with the username and password arguments.
     *
     * @param userName the user name
     * @param password the password
     */
    public UsernamePasswordCredentials(String userName, String password) {
        super();
        if (userName == null) {
            throw new IllegalArgumentException("Username may not be null");
        }
        this.userName = userName;
        this.password = password;
    }

    // ----------------------------------------------------- Instance Variables

    /**
     * User name.
     */
    private String userName;


    /**
     * Password.
     */
    private String password;


    // ------------------------------------------------------------- Properties


    /**
     * User name property setter. User name may not be null.
     *
     * @param userName
     * @see #getUserName()
     *
     * @deprecated Do not use. The UsernamePasswordCredentials objects should be immutable
     */
    public void setUserName(String userName) {
        if (userName == null) {
            throw new IllegalArgumentException("Username may not be null");
        }
        this.userName = userName;
    }


    /**
     * User name property getter.
     *
     * @return the userName
     * @see #setUserName(String)
     */
    public String getUserName() {
        return userName;
    }


    /**
     * Password property setter.
     *
     * @param password
     * @see #getPassword()
     *
     * @deprecated Do not use. The UsernamePasswordCredentials objects should be immutable
     */
    public void setPassword(String password) {
        this.password = password;
    }


    /**
     * Password property getter.
     *
     * @return the password
     * @see #setPassword(String)
     */
    public String getPassword() {
        return password;
    }


    /**
     * Get this object string.
     *
     * @return the username:password formed string
     */
    public String toString() {
        StringBuffer result = new StringBuffer();
        result.append(this.userName);
        result.append(":");
        result.append((this.password == null) ? "null" : this.password);
        return result.toString();
    }

    /**
     * Does a hash of both user name and password.
     *
     * @return The hash code including user name and password.
     */
    public int hashCode() {
        int hash = LangUtils.HASH_SEED;
        hash = LangUtils.hashCode(hash, this.userName);
        hash = LangUtils.hashCode(hash, this.password);
        return hash;
    }

    /**
     * These credentials are assumed equal if the username and password are the
     * same.
     *
     * @param o The other object to compare with.
     *
     * @return  <code>true</code> if the object is equivalent.
     */
    public boolean equals(Object o) {
        if (o == null) return false;
        if (this == o) return true;
        // note - to allow for sub-classing, this checks that class is the same
        // rather than do "instanceof".
        if (this.getClass().equals(o.getClass())) {
            UsernamePasswordCredentials that = (UsernamePasswordCredentials) o;

            if (LangUtils.equals(this.userName, that.userName)
                    && LangUtils.equals(this.password, that.password) ) {
                return true;
            }
        }
        return false;
    }
}