/*
 * Jitsi, the OpenSource Java VoIP and Instant Messaging client.
 *
 * Copyright @ 2015 Atlassian Pty Ltd
 *
 * Licensed 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 net.java.sip.communicator.impl.protocol.jabber.extensions.usersearch;

import java.util.*;

import org.jivesoftware.smack.packet.*;
import org.jivesoftware.smack.util.*;
import org.jivesoftware.smackx.*;
import org.jivesoftware.smackx.packet.*;

/**
 * Implements the <tt>IQ</tt> packets for user search (XEP-0055)
 *
 * @author Hristo Terezov
 */
public class UserSearchIQ extends IQ {
    /**
     * This field represents the result of the search.
     */
    private ReportedData data;

    /**
     * This map stores the supported fields that are not defined in the data
     * form and their values.
     */
    private Map<String, String> simpleFieldsNames
        = new HashMap<String, String>();

    @Override
    public String getChildElementXML() {
        StringBuilder buf = new StringBuilder();
        buf.append("<query xmlns=\"jabber:iq:search\">");
        if(getExtension("x", "jabber:x:data") != null)
        {
            buf.append(getExtensionsXML());
        }
        else
        {
            buf.append(getItemsToSearch());
        }
        buf.append("</query>");
        return buf.toString();
    }

    /**
     * Sets the <tt>data</tt> property of the class.
     * @param data the data to be set.
     */
    public void setData(ReportedData data)
    {
        this.data = data;
    }

    /**
     * Returns the <tt>data</tt> property of the class.
     * @return
     */
    public ReportedData getData()
    {
        ReportedData data = ReportedData.getReportedDataFrom(this);
        if(data == null)
            return this.data;
        return data;
    }

    /**
     * Adds filter field to the <tt>IQ</tt> packet and value for the field.
     * @param field the field name.
     * @param value the value of the field.
     */
    public void addField(String field, String value)
    {
        simpleFieldsNames.put(field, value);
    }

    /**
     * Returns XML string with the fields that are not included in the data form
     * @return XML string with the fields that are not included in the data form
     */
    private String getItemsToSearch() {
        StringBuilder buf = new StringBuilder();

        if (simpleFieldsNames.isEmpty()) {
            return "";
        }

        for (String name : simpleFieldsNames.keySet())
        {
            String value = simpleFieldsNames.get(name);
            if (value != null && value.trim().length() > 0) {
                buf.append("<").append(name).append(">")
                    .append(StringUtils.escapeForXML(value)).append("</")
                    .append(name).append(">");
            }
        }

        return buf.toString();
    }

    /**
     * Returns the names of the fields that are not included in the data form.
     * @return the field names.
     */
    public Set<String> getFields()
    {
        return simpleFieldsNames.keySet();
    }

    /**
     * Creates and returns answer form.
     * @return the answer form.
     */
    public Form getAnswerForm()
    {
        Form form = Form.getFormFrom(this);
        if(form == null)
            return null;
        return form.createAnswerForm();
    }

    /**
     * Sets data form in the <tt>IQ</tt> packet.
     * @param form the form to be set.
     */
    public void setForm(DataForm form)
    {
        addExtension(form);
    }

}