/*
 * 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;

import java.net.*;
import java.text.*;
import java.util.*;

import net.java.sip.communicator.service.protocol.*;
import net.java.sip.communicator.service.protocol.ServerStoredDetails.*;
import net.java.sip.communicator.service.protocol.event.*;
import net.java.sip.communicator.util.*;

import org.apache.commons.lang3.*;
import org.jivesoftware.smack.*;

/**
 * The Account Info Operation set is a means of accessing and modifying detailed
 * information on the user/account that is currently logged in through this
 * provider.
 *
 * @author Damian Minkov
 * @author Marin Dzhigarov
 * @author Hristo Terezov
 */
public class OperationSetServerStoredAccountInfoJabberImpl
    extends AbstractOperationSetServerStoredAccountInfo
{
    /**
     * The logger.
     */
    private static final Logger logger =
        Logger.getLogger(OperationSetServerStoredAccountInfoJabberImpl.class);

    /**
     * The info retriever.
     */
    private InfoRetreiver infoRetreiver = null;

    /**
     * The jabber provider that created us.
     */
    private ProtocolProviderServiceJabberImpl jabberProvider = null;

    /**
     * List of all supported <tt>ServerStoredDetails</tt>
     * for this implementation.
     */
    public static final List<Class<? extends GenericDetail>> supportedTypes
        = new ArrayList<Class<? extends GenericDetail>>();

    static {
        supportedTypes.add(ImageDetail.class);
        supportedTypes.add(FirstNameDetail.class);
        supportedTypes.add(MiddleNameDetail.class);
        supportedTypes.add(LastNameDetail.class);
        supportedTypes.add(NicknameDetail.class);
        supportedTypes.add(AddressDetail.class);
        supportedTypes.add(CityDetail.class);
        supportedTypes.add(ProvinceDetail.class);
        supportedTypes.add(PostalCodeDetail.class);
        supportedTypes.add(CountryDetail.class);
        supportedTypes.add(EmailAddressDetail.class);
        supportedTypes.add(WorkEmailAddressDetail.class);
        supportedTypes.add(PhoneNumberDetail.class);
        supportedTypes.add(WorkPhoneDetail.class);
        supportedTypes.add(MobilePhoneDetail.class);
        supportedTypes.add(VideoDetail.class);
        supportedTypes.add(WorkVideoDetail.class);
        supportedTypes.add(WorkOrganizationNameDetail.class);
        supportedTypes.add(URLDetail.class);
        supportedTypes.add(BirthDateDetail.class);
        supportedTypes.add(JobTitleDetail.class);
        supportedTypes.add(AboutMeDetail.class);
    }

    /**
     * Our account UIN.
     */
    private String uin = null;

    protected OperationSetServerStoredAccountInfoJabberImpl(
        ProtocolProviderServiceJabberImpl jabberProvider,
        InfoRetreiver infoRetreiver,
        String uin)
    {
        this.infoRetreiver = infoRetreiver;
        this.jabberProvider = jabberProvider;
        this.uin = uin;
    }

    /**
     * Returns an iterator over all details that are instances or descendants of
     * the specified class. If for example an our account has a work address
     * and an address detail, a call to this method with AddressDetail.class
     * would return both of them.
     * <p>
     * @param detailClass one of the detail classes defined in the
     * ServerStoredDetails class, indicating the kind of details we're
     * interested in.
     * <p>
     * @return a java.util.Iterator over all details that are instances or
     * descendants of the specified class.
     */
    public <T extends GenericDetail> Iterator<T> getDetailsAndDescendants(
        Class<T> detailClass)
    {
        assertConnected();

        return infoRetreiver.getDetailsAndDescendants(uin, detailClass);
    }

    /**
     * Returns an iterator over all details that are instances of exactly the
     * same class as the one specified. Not that, contrary to the
     * getDetailsAndDescendants() method this one would only return details
     * that are instances of the specified class and not only its descendants.
     * If for example our account has both a work address and an address detail,
     * a call to this method with AddressDetail.class would return only the
     * AddressDetail instance and not the WorkAddressDetail instance.
     * <p>
     * @param detailClass one of the detail classes defined in the
     * ServerStoredDetails class, indicating the kind of details we're
     * interested in.
     * <p>
     * @return a java.util.Iterator over all details of specified class.
     */
    public Iterator<GenericDetail> getDetails(
        Class<? extends GenericDetail> detailClass)
    {
        assertConnected();

        return infoRetreiver.getDetails(uin, detailClass);
    }

    /**
     * Returns all details currently available and set for our account.
     * <p>
     * @return a java.util.Iterator over all details currently set our account.
     */
    public Iterator<GenericDetail> getAllAvailableDetails()
    {
        assertConnected();

        return infoRetreiver.getContactDetails(uin).iterator();
    }

    /**
     * Returns all detail Class-es that the underlying implementation supports
     * setting. Note that if you call one of the modification methods (add
     * remove or replace) with a detail not contained by the iterator returned
     * by this method, an IllegalArgumentException will be thrown.
     * <p>
     * @return a java.util.Iterator over all detail classes supported by the
     * implementation.
     */
    public Iterator<Class<? extends GenericDetail>> getSupportedDetailTypes()
    {
        return supportedTypes.iterator();
    }

    /**
     * Determines whether a detail class represents a detail supported by the
     * underlying implementation or not. Note that if you call one of the
     * modification methods (add remove or replace) with a detail that this
     * method has determined to be unsupported (returned false) this would lead
     * to an IllegalArgumentException being thrown.
     * <p>
     * @param detailClass the class the support for which we'd like to
     * determine.
     * <p>
     * @return true if the underlying implementation supports setting details of
     * this type and false otherwise.
     */
    public boolean isDetailClassSupported(
        Class<? extends GenericDetail> detailClass)
    {
        return supportedTypes.contains(detailClass);
    }

    /**
     * The method returns the number of instances supported for a particular
     * detail type. Some protocols offer storing multiple values for a
     * particular detail type. Spoken languages are a good example.
     * @param detailClass the class whose max instance number we'd like to find
     * out.
     * <p>
     * @return int the maximum number of detail instances.
     */
    public int getMaxDetailInstances(Class<? extends GenericDetail> detailClass)
    {
        return 1;
    }

    /**
     * Adds the specified detail to the list of details ready to be saved online
     * for this account. If such a detail already exists its max instance number
     * is consulted and if it allows it - a second instance is added or otherwise
     * and illegal argument exception is thrown. An IllegalArgumentException is
     * also thrown in case the class of the specified detail is not supported by
     * the underlying implementation, i.e. its class name was not returned by the
     * getSupportedDetailTypes() method.
     * <p>
     * @param detail the detail that we'd like registered on the server.
     * <p>
     * @throws IllegalArgumentException if such a detail already exists and its
     * max instances number has been attained or if the underlying
     * implementation does not support setting details of the corresponding
     * class.
     * @throws java.lang.ArrayIndexOutOfBoundsException if the number of
     * instances currently registered by the application is already equal to the
     * maximum number of supported instances (@see getMaxDetailInstances())
     */
    public void addDetail(ServerStoredDetails.GenericDetail detail)
        throws IllegalArgumentException,
               ArrayIndexOutOfBoundsException
    {
        if (!isDetailClassSupported(detail.getClass())) {
            throw new IllegalArgumentException(
                    "implementation does not support such details " +
                    detail.getClass());
        }

        Iterator<GenericDetail> iter = getDetails(detail.getClass());
        int currentDetailsSize = 0;
        while (iter.hasNext())
        {
            currentDetailsSize++;
            iter.next();
        }

        if (currentDetailsSize > getMaxDetailInstances(detail.getClass()))
        {
            throw new ArrayIndexOutOfBoundsException(
                    "Max count for this detail is already reached");
        }

        infoRetreiver.getCachedContactDetails(uin).add(detail);
    }

    /**
     * Removes the specified detail from the list of details ready to be saved
     * online this account. The method returns a boolean indicating if such a
     * detail was found (and removed) or not.
     * <p>
     * @param detail the detail to remove
     * @return true if the specified detail existed and was successfully removed
     * and false otherwise.
     */
    public boolean removeDetail(ServerStoredDetails.GenericDetail detail)
    {

        return infoRetreiver.getCachedContactDetails(uin).remove(detail);
    }

    /**
     * Replaces the currentDetailValue detail with newDetailValue and returns
     * true if the operation was a success or false if currentDetailValue did
     * not previously exist (in this case an additional call to addDetail is
     * required).
     * <p>
     * @param currentDetailValue the detail value we'd like to replace.
     * @param newDetailValue the value of the detail that we'd like to replace
     * currentDetailValue with.
     * @return true if the operation was a success or false if
     * currentDetailValue did not previously exist (in this case an additional
     * call to addDetail is required).
     * @throws ClassCastException if newDetailValue is not an instance of the
     * same class as currentDetailValue.
     */
    public boolean replaceDetail(
                    ServerStoredDetails.GenericDetail currentDetailValue,
                    ServerStoredDetails.GenericDetail newDetailValue)
        throws ClassCastException
    {
        if (!newDetailValue.getClass().equals(currentDetailValue.getClass()))
        {
            throw new ClassCastException(
                    "New value to be replaced is not as the current one");
        }
        // if values are the same no change
        if (currentDetailValue.equals(newDetailValue))
        {
            return true;
        }

        boolean isFound = false;
        Iterator<GenericDetail> iter =
                infoRetreiver.getDetails(uin, currentDetailValue.getClass());

        while (iter.hasNext())
        {
            GenericDetail item = iter.next();
            if (item.equals(currentDetailValue))
            {
                isFound = true;
                break;
            }
        }
        // current detail value does not exist
        if (!isFound)
        {
            return false;
        }

        removeDetail(currentDetailValue);
        addDetail(newDetailValue);
        return true;
    }

    /**
     * Saves the list of details for this account that were ready to be stored
     * online on the server. This method performs the actual saving of details
     * online on the server and is supposed to be invoked after addDetail(),
     * replaceDetail() and/or removeDetail().
     * <p>
     * @throws OperationFailedException with code Network Failure if putting the
     * new values back online has failed.
     */
    public void save() throws OperationFailedException
    {
        assertConnected();

        List<GenericDetail> details = infoRetreiver.getContactDetails(uin);
        VCardXEP0153 vCard = new VCardXEP0153();
        for (GenericDetail detail : details)
        {
            if (detail instanceof ImageDetail)
            {
                byte[] avatar = ((ImageDetail) detail).getBytes();
                if (avatar == null) vCard.setAvatar(new byte[0]);
                else vCard.setAvatar(avatar);
                fireServerStoredDetailsChangeEvent(
                    jabberProvider,
                    ServerStoredDetailsChangeEvent.DETAIL_ADDED,
                    null,
                    detail);
            }
            else if (detail.getClass().equals(FirstNameDetail.class))
            {
                vCard.setFirstName((String)detail.getDetailValue());
            }
            else if (detail.getClass().equals(MiddleNameDetail.class))
            {
                vCard.setMiddleName((String)detail.getDetailValue());
            }
            else if (detail.getClass().equals(LastNameDetail.class))
            {
                vCard.setLastName((String)detail.getDetailValue());
            }
            else if (detail.getClass().equals(NicknameDetail.class))
                vCard.setNickName((String)detail.getDetailValue());
            else if (detail.getClass().equals(URLDetail.class))
            {
                if (detail.getDetailValue() != null)
                    vCard.setField(
                        "URL", ((URL)detail.getDetailValue()).toString());
            }
            else if (detail.getClass().equals(BirthDateDetail.class))
            {
                if (detail.getDetailValue() != null)
                {
                    Calendar c = ((BirthDateDetail)detail).getCalendar();
                    DateFormat dateFormat =
                        new SimpleDateFormat(
                            JabberActivator.getResources().getI18NString(
                                "plugin.accountinfo.BDAY_FORMAT"));
                    String strdate = dateFormat.format(c.getTime());
                    vCard.setField("BDAY", strdate);
                }
            }
            else if (detail.getClass().equals(AddressDetail.class))
                vCard.setAddressFieldHome(
                    "STREET", (String)detail.getDetailValue());
            else if (detail.getClass().equals(CityDetail.class))
                vCard.setAddressFieldHome(
                    "LOCALITY", (String)detail.getDetailValue());
            else if (detail.getClass().equals(ProvinceDetail.class))
                vCard.setAddressFieldHome(
                    "REGION", (String)detail.getDetailValue());
            else if (detail.getClass().equals(PostalCodeDetail.class))
                vCard.setAddressFieldHome(
                    "PCODE", (String)detail.getDetailValue());
            else if (detail.getClass().equals(CountryDetail.class))
                vCard.setAddressFieldHome(
                    "CTRY", (String)detail.getDetailValue());
            else if (detail.getClass().equals(PhoneNumberDetail.class))
                vCard.setPhoneHome("VOICE", (String)detail.getDetailValue());
            else if (detail.getClass().equals(WorkPhoneDetail.class))
                vCard.setPhoneWork("VOICE", (String)detail.getDetailValue());
            else if (detail.getClass().equals(MobilePhoneDetail.class))
                vCard.setPhoneHome("CELL", (String)detail.getDetailValue());
            else if (detail.getClass().equals(VideoDetail.class))
                vCard.setPhoneHome("VIDEO", (String)detail.getDetailValue());
            else if (detail.getClass().equals(WorkVideoDetail.class))
                vCard.setPhoneWork("VIDEO", (String)detail.getDetailValue());
            else if (detail.getClass().equals(EmailAddressDetail.class))
                vCard.setEmailHome((String)detail.getDetailValue());
            else if (detail.getClass().equals(WorkEmailAddressDetail.class))
                vCard.setEmailWork((String)detail.getDetailValue());
            else if (detail.getClass().equals(WorkOrganizationNameDetail.class))
                vCard.setOrganization((String)detail.getDetailValue());
            else if (detail.getClass().equals(JobTitleDetail.class))
                vCard.setField("TITLE", (String)detail.getDetailValue());
            else if (detail.getClass().equals(AboutMeDetail.class))
                vCard.setField("ABOUTME", (String)detail.getDetailValue());
        }

        //Fix the display name detail
        String tmp;

        tmp = infoRetreiver.checkForFullName(vCard);
        if(tmp != null)
        {
            DisplayNameDetail displayNameDetail = new DisplayNameDetail(
                StringEscapeUtils.unescapeXml(tmp));
            Iterator<GenericDetail> detailIt
                = infoRetreiver.getDetails(uin, DisplayNameDetail.class);
            while(detailIt.hasNext())
            {
                infoRetreiver.getCachedContactDetails(uin)
                    .remove(detailIt.next());
            }
            infoRetreiver.getCachedContactDetails(uin).add(displayNameDetail);
        }

        try
        {
            vCard.save(jabberProvider.getConnection());
        }
        catch (XMPPException xmppe)
        {
            logger.error("Error loading/saving vcard: ", xmppe);
            throw new OperationFailedException(
                "Error loading/saving vcard: ", 1, xmppe);
        }
    }

    /**
     * Determines whether the underlying implementation supports edition
     * of this detail class.
     * <p>
     * @param detailClass the class whose edition we'd like to determine if it's
     * possible
     * @return true if the underlying implementation supports edition of this
     * type of detail and false otherwise.
     */
    public boolean isDetailClassEditable(
        Class<? extends GenericDetail> detailClass)
    {
        if (isDetailClassSupported(detailClass)) {
            return true;
        }
        return false;
    }

    /**
     * Utility method throwing an exception if the jabber stack is not properly
     * initialized.
     * @throws java.lang.IllegalStateException if the underlying jabber stack is
     * not registered and initialized.
     */
    private void assertConnected() throws IllegalStateException
    {
        if (jabberProvider == null)
            throw new IllegalStateException(
                "The jabber provider must be non-null and signed on "
                +"before being able to communicate.");
        if (!jabberProvider.isRegistered())
            throw new IllegalStateException(
                "The jabber provider must be signed on before "
                +"being able to communicate.");
    }
}