/*
 * Retroshare Posted List
 *
 * Copyright 2012-2012 by Robert Fernie.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License Version 2.1 as published by the Free Software Foundation.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA.
 *
 * Please report all bugs and problems to "retroshare@lunamutt.com".
 *
 */

#include "PostedListDialog.h"

//#include <retroshare/rspeers.h>
#include <retroshare/rsposted.h>

#include <iostream>
#include <sstream>
#include <algorithm>

#include <QTimer>
#include <QMenu>
#include <QMessageBox>

/****************************************************************
 */

//#define DEBUG_FORUMS

/* Images for context menu icons */
#define IMAGE_MESSAGE        ":/images/folder-draft.png"
#define IMAGE_MESSAGEREPLY   ":/images/mail_reply.png"
#define IMAGE_MESSAGEREMOVE  ":/images/mail_delete.png"
#define IMAGE_DOWNLOAD       ":/images/start.png"
#define IMAGE_DOWNLOADALL    ":/images/startall.png"

/* Images for TreeWidget */
#define IMAGE_FOLDER         ":/images/folder16.png"
#define IMAGE_FOLDERGREEN    ":/images/folder_green.png"
#define IMAGE_FOLDERRED      ":/images/folder_red.png"
#define IMAGE_FOLDERYELLOW   ":/images/folder_yellow.png"
#define IMAGE_FORUM          ":/images/konversation16.png"
#define IMAGE_SUBSCRIBE      ":/images/edit_add24.png"
#define IMAGE_UNSUBSCRIBE    ":/images/cancel.png"
#define IMAGE_INFO           ":/images/info16.png"
#define IMAGE_NEWFORUM       ":/images/new_forum16.png"
#define IMAGE_FORUMAUTHD     ":/images/konv_message2.png"
#define IMAGE_COPYLINK       ":/images/copyrslink.png"

/** Constructor */
PostedListDialog::PostedListDialog(QWidget *parent)
: RsAutoUpdatePage(1000,parent)
{
    /* Invoke the Qt Designer generated object setup routine */
    ui.setupUi(this);

	/* Setup Queue */
        mPostedQueue = new TokenQueue(rsPosted, this);

    connect( ui.groupTreeWidget, SIGNAL( treeCustomContextMenuRequested( QPoint ) ), this, SLOT( groupListCustomPopupMenu( QPoint ) ) );

    connect( ui.groupTreeWidget, SIGNAL( treeCurrentItemChanged(QString) ), this, SLOT( changedTopic(QString) ) );

    /* Initialize group tree */
    //ui.groupTreeWidget->initDisplayMenu(ui.displayButton);

    /* create forum tree */
    yourTopics = ui.groupTreeWidget->addCategoryItem(tr("Your Topics"), QIcon(IMAGE_FOLDER), true);
    subscribedTopics = ui.groupTreeWidget->addCategoryItem(tr("Subscribed Topics"), QIcon(IMAGE_FOLDERRED), true);
    popularTopics = ui.groupTreeWidget->addCategoryItem(tr("Popular Topics"), QIcon(IMAGE_FOLDERGREEN), false);
    otherTopics = ui.groupTreeWidget->addCategoryItem(tr("Other Topics"), QIcon(IMAGE_FOLDERYELLOW), false);

    /* Hide platform specific features */
#ifdef Q_WS_WIN

#endif
}


void PostedListDialog::groupListCustomPopupMenu( QPoint /*point*/ )
{
    QMenu contextMnu( this );

    QAction *action = contextMnu.addAction(QIcon(IMAGE_SUBSCRIBE), tr("Subscribe to Forum"), this, SLOT(subscribeToForum()));
    //action->setDisabled (mCurrTopicId.empty() || IS_FORUM_SUBSCRIBED(subscribeFlags));

    action = contextMnu.addAction(QIcon(IMAGE_UNSUBSCRIBE), tr("Unsubscribe to Forum"), this, SLOT(unsubscribeToForum()));
    //action->setEnabled (!mCurrTopicId.empty() && IS_FORUM_SUBSCRIBED(subscribeFlags));

    contextMnu.addSeparator();

    contextMnu.addAction(QIcon(IMAGE_NEWFORUM), tr("New Forum"), this, SLOT(newforum()));

    action = contextMnu.addAction(QIcon(IMAGE_INFO), tr("Show Forum Details"), this, SLOT(showForumDetails()));
    action->setEnabled (!mCurrTopicId.empty ());

    action = contextMnu.addAction(QIcon(":/images/settings16.png"), tr("Edit Forum Details"), this, SLOT(editForumDetails()));
    //action->setEnabled (!mCurrTopicId.empty () && IS_FORUM_ADMIN(subscribeFlags));

    QAction *shareKeyAct = new QAction(QIcon(":/images/gpgp_key_generate.png"), tr("Share Forum"), &contextMnu);
    connect( shareKeyAct, SIGNAL( triggered() ), this, SLOT( shareKey() ) );
    //shareKeyAct->setEnabled(!mCurrTopicId.empty() && IS_FORUM_ADMIN(subscribeFlags));
    contextMnu.addAction( shareKeyAct);

    QAction *restoreKeysAct = new QAction(QIcon(":/images/settings16.png"), tr("Restore Publish Rights for Forum" ), &contextMnu);
    connect( restoreKeysAct , SIGNAL( triggered() ), this, SLOT( restoreForumKeys() ) );
    //restoreKeysAct->setEnabled(!mCurrTopicId.empty() && !IS_FORUM_ADMIN(subscribeFlags));
    contextMnu.addAction( restoreKeysAct);

    action = contextMnu.addAction(QIcon(IMAGE_COPYLINK), tr("Copy RetroShare Link"), this, SLOT(copyForumLink()));
    action->setEnabled(!mCurrTopicId.empty());

    contextMnu.addSeparator();

    action = contextMnu.addAction(QIcon(":/images/message-mail-read.png"), tr("Mark all as read"), this, SLOT(markMsgAsReadAll()));
    //action->setEnabled (!mCurrTopicId.empty () && IS_FORUM_SUBSCRIBED(subscribeFlags));

    action = contextMnu.addAction(QIcon(":/images/message-mail.png"), tr("Mark all as unread"), this, SLOT(markMsgAsUnreadAll()));
    //action->setEnabled (!mCurrTopicId.empty () && IS_FORUM_SUBSCRIBED(subscribeFlags));

#ifdef DEBUG_FORUMS
    contextMnu.addSeparator();
    action = contextMnu.addAction("Generate mass data", this, SLOT(generateMassData()));
    action->setEnabled (!mCurrTopicId.empty() && IS_FORUM_SUBSCRIBED(subscribeFlags));
#endif

    contextMnu.exec(QCursor::pos());
}

void PostedListDialog::updateDisplay()
{
    std::list<std::string> groupIds;
    std::list<std::string>::iterator it;
    if (!rsPosted)
        return;

	// TODO groupsChanged... HACK XXX.
#if 0
    if ((rsPosted->groupsChanged(groupIds)) || (rsPosted->updated()))
    {
        /* update Forums List */
        insertGroups();

        it = std::find(groupIds.begin(), groupIds.end(), mCurrTopicId);
        if (it != groupIds.end())
        {
            /* update threads as well */
            insertThreads();
        }
    }
#endif

    if (rsPosted->updated())
    {
        /* update Forums List */
        insertGroups();
        insertThreads();
    }

}

void PostedListDialog::changedTopic(const QString &id)
{
    mCurrTopicId = id.toStdString();
    insertThreads();
}


/*********************** **** **** **** ***********************/
/** Request / Response of Data ********************************/
/*********************** **** **** **** ***********************/

#define 	POSTEDDIALOG_LISTING			1
#define 	POSTEDDIALOG_CURRENTFORUM		2
#define 	POSTEDDIALOG_INSERTTHREADS		3
#define 	POSTEDDIALOG_INSERTCHILD		4
#define 	POSTEDDIALOG_INSERT_POST		5
#define 	POSTEDDIALOG_REPLY_MESSAGE		6


void PostedListDialog::insertGroups()
{
	requestGroupSummary();
}

void PostedListDialog::requestGroupSummary()
{
        std::cerr << "PostedListDialog::requestGroupSummary()";
        std::cerr << std::endl;

        std::list<std::string> ids;
        RsTokReqOptions opts;
	uint32_t token;
        mPostedQueue->requestGroupInfo(token,  RS_TOKREQ_ANSTYPE_SUMMARY, opts, ids, POSTEDDIALOG_LISTING);
}

void PostedListDialog::loadGroupSummary(const uint32_t &token)
{
        std::cerr << "PostedListDialog::loadGroupSummary()";
        std::cerr << std::endl;

        std::list<RsGroupMetaData> groupInfo;
        rsPosted->getGroupSummary(token, groupInfo);

        if (groupInfo.size() > 0)
        {
		insertGroupData(groupInfo);
        }
        else
        {
                std::cerr << "PostedListDialog::loadGroupSummary() ERROR No Groups...";
                std::cerr << std::endl;
        }
}

/*********************** **** **** **** ***********************/
/*********************** **** **** **** ***********************/



void PostedListDialog::requestGroupSummary_CurrentForum(const std::string &forumId)
{
	RsTokReqOptions opts;
	
	std::list<std::string> grpIds;
	grpIds.push_back(forumId);

        std::cerr << "PostedListDialog::requestGroupSummary_CurrentForum(" << forumId << ")";
        std::cerr << std::endl;

	uint32_t token;	
	mPostedQueue->requestGroupInfo(token, RS_TOKREQ_ANSTYPE_SUMMARY, opts, grpIds, POSTEDDIALOG_CURRENTFORUM);
}

void PostedListDialog::loadGroupSummary_CurrentForum(const uint32_t &token)
{
        std::cerr << "PostedListDialog::loadGroupSummary_CurrentForum()";
        std::cerr << std::endl;

        std::list<RsGroupMetaData> groupInfo;
        rsPosted->getGroupSummary(token, groupInfo);

        if (groupInfo.size() == 1)
        {
		RsGroupMetaData fi = groupInfo.front();
		//insertForumThreads(fi);
        }
        else
        {
                std::cerr << "PostedListDialog::loadGroupSummary_CurrentForum() ERROR Invalid Number of Groups...";
                std::cerr << std::endl;
        }
}

/*********************** **** **** **** ***********************/
/*********************** **** **** **** ***********************/
/*********************** **** **** **** ***********************/
/*********************** **** **** **** ***********************/


void PostedListDialog::insertThreads()
{
	loadCurrentForumThreads(mCurrTopicId);
}

void PostedListDialog::loadCurrentForumThreads(const std::string &forumId)
{

        std::cerr << "PostedListDialog::loadCurrentForumThreads(" << forumId << ")";
        std::cerr << std::endl;

	if (forumId.empty())
	{
        	std::cerr << "PostedListDialog::loadCurrentForumThreads() Empty GroupId .. ignoring Req";
        	std::cerr << std::endl;
		return;
	}

	/* if already active -> kill current loading */
	if (mThreadLoading)
	{
		/* Cleanup */
	}

	clearPosts();

	/* initiate loading */
        std::cerr << "PostedListDialog::loadCurrentForumThreads() Initiating Loading";
        std::cerr << std::endl;

	mThreadLoading = true;

	requestGroupThreadData_InsertThreads(forumId);
}



void PostedListDialog::requestGroupThreadData_InsertThreads(const std::string &groupId)
{
	RsTokReqOptions opts;

	opts.mOptions = RS_TOKREQOPT_MSG_THREAD | RS_TOKREQOPT_MSG_LATEST;
	
	std::list<std::string> grpIds;
	grpIds.push_back(groupId);

        std::cerr << "PostedListDialog::requestGroupThreadData_InsertThreads(" << groupId << ")";
        std::cerr << std::endl;

	uint32_t token;	
	//mPostedQueue->requestMsgInfo(token, RS_TOKREQ_ANSTYPE_DATA, opts, grpIds, POSTEDDIALOG_INSERTTHREADS);

	// Do specific Posted Request....
	rsPosted->requestRanking(token, groupId);
	// get the Queue to handle response.
        mPostedQueue->queueRequest(token, TOKENREQ_MSGINFO, RS_TOKREQ_ANSTYPE_DATA, POSTEDDIALOG_INSERTTHREADS);

}


void PostedListDialog::loadGroupThreadData_InsertThreads(const uint32_t &token)
{
	std::cerr << "PostedListDialog::loadGroupThreadData_InsertThreads()";
	std::cerr << std::endl;
	
	bool moreData = true;
	while(moreData)
	{
		RsPostedPost post;
		// Old Format.
		//if (rsPosted->getPost(token, post))

		if (rsPosted->getRankedPost(token, post))
		{
			std::cerr << "PostedListDialog::loadGroupThreadData_InsertThreads() MsgId: " << post.mMeta.mMsgId;
			std::cerr << std::endl;
		
			loadPost(post);
		}
		else
		{
			moreData = false;
		}
	}

	mThreadLoading = false;

}

void PostedListDialog::loadPost(const RsPostedPost &post)
{
        PostedItem *item = new PostedItem(this, post);
        QLayout *alayout = ui.scrollAreaWidgetContents->layout();
        alayout->addWidget(item);	
}


void PostedListDialog::clearPosts()
{
        std::cerr << "PostedListDialog::clearPosts()" << std::endl;

        std::list<PostedItem *> postedItems;
        std::list<PostedItem *>::iterator pit;

        QLayout *alayout = ui.scrollAreaWidgetContents->layout();
        int count = alayout->count();
        for(int i = 0; i < count; i++)
        {
                QLayoutItem *litem = alayout->itemAt(i);
                if (!litem)
                {
                        std::cerr << "PostedListDialog::clearPosts() missing litem";
                        std::cerr << std::endl;
                        continue;
                }

                PostedItem *item = dynamic_cast<PostedItem *>(litem->widget());
                if (item)
                {
                        std::cerr << "PostedListDialog::clearPosts() item: " << item;
                        std::cerr << std::endl;

                        postedItems.push_back(item);
                }
                else
                {
                        std::cerr << "PostedListDialog::clearPosts() Found Child, which is not a PostedItem???";
                        std::cerr << std::endl;
                }
        }

        for(pit = postedItems.begin(); pit != postedItems.end(); pit++)
        {
                PostedItem *item = *pit;
                alayout->removeWidget(item);
                delete item;
        }
}



/*********************** **** **** **** ***********************/
/*********************** **** **** **** ***********************/
/*********************** **** **** **** ***********************/
	
void PostedListDialog::loadRequest(const TokenQueue *queue, const TokenRequest &req)
{
	std::cerr << "PostedListDialog::loadRequest() UserType: " << req.mUserType;
	std::cerr << std::endl;
				
	if (queue == mPostedQueue)
	{
		/* now switch on req */
		switch(req.mUserType)
		{
			case POSTEDDIALOG_LISTING:
				loadGroupSummary(req.mToken);
				break;

			case POSTEDDIALOG_CURRENTFORUM:
				loadGroupSummary_CurrentForum(req.mToken);
				break;

			case POSTEDDIALOG_INSERTTHREADS:
				loadGroupThreadData_InsertThreads(req.mToken);
				break;

			default:
				std::cerr << "PostedListDialog::loadRequest() ERROR: INVALID TYPE";
				std::cerr << std::endl;
				break;
		}
	}
}



/**************************************************************************************/
/**************************************************************************************/
/**************************************************************************************/
/**************************** Groups **********************/


void PostedListDialog::groupInfoToGroupItemInfo(const RsGroupMetaData &groupInfo, GroupItemInfo &groupItemInfo)
{

    groupItemInfo.id = QString::fromStdString(groupInfo.mGroupId);
    groupItemInfo.name = QString::fromUtf8(groupInfo.mGroupName.c_str());
    //groupItemInfo.description = QString::fromUtf8(groupInfo.forumDesc);
    groupItemInfo.popularity = groupInfo.mPop;
    groupItemInfo.lastpost = QDateTime::fromTime_t(groupInfo.mLastPost);

    if (groupInfo.mGroupFlags & RS_DISTRIB_AUTHEN_REQ) {
        groupItemInfo.name += " (" + tr("AUTHD") + ")";
        groupItemInfo.icon = QIcon(IMAGE_FORUMAUTHD);
    } else {
        groupItemInfo.icon = QIcon(IMAGE_FORUM);
    }
}

void PostedListDialog::insertGroupData(const std::list<RsGroupMetaData> &groupList)
{
	std::list<RsGroupMetaData>::const_iterator it;

    QList<GroupItemInfo> adminList;
    QList<GroupItemInfo> subList;
    QList<GroupItemInfo> popList;
    QList<GroupItemInfo> otherList;
    std::multimap<uint32_t, GroupItemInfo> popMap;

    for (it = groupList.begin(); it != groupList.end(); it++) {
		/* sort it into Publish (Own), Subscribed, Popular and Other */
		uint32_t flags = it->mSubscribeFlags;

        GroupItemInfo groupItemInfo;
        groupInfoToGroupItemInfo(*it, groupItemInfo);

        if (flags & RSGXS_GROUP_SUBSCRIBE_ADMIN) {
            adminList.push_back(groupItemInfo);
        } else if (flags & RSGXS_GROUP_SUBSCRIBE_SUBSCRIBED) {
			/* subscribed forum */
            subList.push_back(groupItemInfo);
        } else {
			/* rate the others by popularity */
            popMap.insert(std::make_pair(it->mPop, groupItemInfo));
		}
	}

	/* iterate backwards through popMap - take the top 5 or 10% of list */
	uint32_t popCount = 5;
	if (popCount < popMap.size() / 10)
	{
		popCount = popMap.size() / 10;
	}

	uint32_t i = 0;
	uint32_t popLimit = 0;
    std::multimap<uint32_t, GroupItemInfo>::reverse_iterator rit;
	for(rit = popMap.rbegin(); ((rit != popMap.rend()) && (i < popCount)); rit++, i++) ;
    if (rit != popMap.rend()) {
        popLimit = rit->first;
    }

    for (rit = popMap.rbegin(); rit != popMap.rend(); rit++) {
		if (rit->second.popularity < (int) popLimit) {
            otherList.append(rit->second);
        } else {
            popList.append(rit->second);
        }
	}

	/* now we can add them in as a tree! */
    ui.groupTreeWidget->fillGroupItems(yourTopics, adminList);
    ui.groupTreeWidget->fillGroupItems(subscribedTopics, subList);
    ui.groupTreeWidget->fillGroupItems(popularTopics, popList);
    ui.groupTreeWidget->fillGroupItems(otherTopics, otherList);

	//	updateMessageSummaryList("");
}

/**************************************************************************************/
/**************************************************************************************/
/**************************************************************************************/