/*
 * Retroshare Gxs Feed Item
 *
 * Copyright 2012-2013 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 <QTimer>
#include <QFileInfo>

#include "rshare.h"
#include "GxsChannelPostItem.h"
#include "ui_GxsChannelPostItem.h"

#include "FeedHolder.h"
#include "SubFileItem.h"
#include "util/misc.h"
#include "gui/RetroShareLink.h"
#include "util/HandleRichText.h"
#include "util/DateTime.h"
#include "util/stringutil.h"

#include <iostream>

/****
 * #define DEBUG_ITEM 1
 ****/

#define COLOR_NORMAL QColor(248, 248, 248)
#define COLOR_NEW    QColor(220, 236, 253)

GxsChannelPostItem::GxsChannelPostItem(FeedHolder *feedHolder, uint32_t feedId, const RsGxsGroupId &groupId, const RsGxsMessageId &messageId, bool isHome, bool autoUpdate) :
    GxsFeedItem(feedHolder, feedId, groupId, messageId, isHome, rsGxsChannels, autoUpdate)
{
	setup();

	requestGroup();
	requestMessage();
}

GxsChannelPostItem::GxsChannelPostItem(FeedHolder *feedHolder, uint32_t feedId, const RsGxsChannelGroup &group, const RsGxsChannelPost &post, bool isHome, bool autoUpdate) :
    GxsFeedItem(feedHolder, feedId, post.mMeta.mGroupId, post.mMeta.mMsgId, isHome, rsGxsChannels, autoUpdate)
{
#ifdef DEBUG_ITEM
	std::cerr << "GxsChannelPostItem::GxsChannelPostItem() Direct Load";
	std::cerr << std::endl;
#endif

	setup();

	setGroup(group, false);
	setPost(post);
}

GxsChannelPostItem::GxsChannelPostItem(FeedHolder *feedHolder, uint32_t feedId, const RsGxsChannelPost &post, bool isHome, bool autoUpdate) :
    GxsFeedItem(feedHolder, feedId, post.mMeta.mGroupId, post.mMeta.mMsgId, isHome, rsGxsChannels, autoUpdate)
{
#ifdef DEBUG_ITEM
	std::cerr << "GxsChannelPostItem::GxsChannelPostItem() Direct Load";
	std::cerr << std::endl;
#endif

	setup();

	requestGroup();
	setPost(post);
}

GxsChannelPostItem::~GxsChannelPostItem()
{
	delete(ui);
}

bool GxsChannelPostItem::isUnread() const
{
    return IS_MSG_UNREAD(mPost.mMeta.mMsgStatus) ;
}

void GxsChannelPostItem::setup()
{
	/* Invoke the Qt Designer generated object setup routine */
	ui = new Ui::GxsChannelPostItem;
	ui->setupUi(this);

	setAttribute(Qt::WA_DeleteOnClose, true);

	mInFill = false;
	mCloseOnRead = false;

	/* clear ui */
	ui->titleLabel->setText(tr("Loading"));
	ui->subjectLabel->clear();
	ui->datetimelabel->clear();
	ui->filelabel->clear();

	/* general ones */
	connect(ui->expandButton, SIGNAL(clicked()), this, SLOT(toggle()));
	connect(ui->clearButton, SIGNAL(clicked()), this, SLOT(removeItem()));

	/* specific */
	connect(ui->readAndClearButton, SIGNAL(clicked()), this, SLOT(readAndClearItem()));
	connect(ui->unsubscribeButton, SIGNAL(clicked()), this, SLOT(unsubscribeChannel()));

	connect(ui->downloadButton, SIGNAL(clicked()), this, SLOT(download()));
	// HACK FOR NOW.
	connect(ui->commentButton, SIGNAL(clicked()), this, SLOT(loadComments()));

	connect(ui->playButton, SIGNAL(clicked()), this, SLOT(play(void)));
	connect(ui->copyLinkButton, SIGNAL(clicked()), this, SLOT(copyMessageLink()));

	connect(ui->readButton, SIGNAL(toggled(bool)), this, SLOT(readToggled(bool)));

    // hide voting buttons, backend is not implemented yet
    ui->voteUpButton->hide();
    ui->voteDownButton->hide();
	//connect(ui-> voteUpButton, SIGNAL(clicked()), this, SLOT(makeUpVote()));
	//connect(ui->voteDownButton, SIGNAL(clicked()), this, SLOT(makeDownVote()));

	ui->scoreLabel->hide();

	ui->downloadButton->hide();
	ui->playButton->hide();
	ui->warn_image_label->hide();
	ui->warning_label->hide();

	ui->titleLabel->setMinimumWidth(100);
	ui->subjectLabel->setMinimumWidth(100);
	ui->warning_label->setMinimumWidth(100);

	ui->frame->setProperty("state", "");
	QPalette palette = ui->frame->palette();
	palette.setColor(ui->frame->backgroundRole(), COLOR_NORMAL);
	ui->frame->setPalette(palette);

	ui->expandFrame->hide();
}

bool GxsChannelPostItem::setGroup(const RsGxsChannelGroup &group, bool doFill)
{
	if (groupId() != group.mMeta.mGroupId) {
		std::cerr << "GxsChannelPostItem::setGroup() - Wrong id, cannot set post";
		std::cerr << std::endl;
		return false;
	}

	mGroup = group;

	if (doFill) {
		fill();
	}

	return true;
}

bool GxsChannelPostItem::setPost(const RsGxsChannelPost &post, bool doFill)
{
	if (groupId() != post.mMeta.mGroupId || messageId() != post.mMeta.mMsgId) {
		std::cerr << "GxsChannelPostItem::setPost() - Wrong id, cannot set post";
		std::cerr << std::endl;
		return false;
	}

	mPost = post;

	if (doFill) {
		fill();
	}

	updateItem();

	return true;
}

QString GxsChannelPostItem::getTitleLabel()
{
	return QString::fromUtf8(mPost.mMeta.mMsgName.c_str());
}

QString GxsChannelPostItem::getMsgLabel()
{
	return RsHtml().formatText(NULL, QString::fromUtf8(mPost.mMsg.c_str()), RSHTML_FORMATTEXT_EMBED_SMILEYS | RSHTML_FORMATTEXT_EMBED_LINKS);
}

QString GxsChannelPostItem::groupName()
{
	return QString::fromUtf8(mGroup.mMeta.mGroupName.c_str());
}

void GxsChannelPostItem::loadComments()
{
	QString title = QString::fromUtf8(mPost.mMeta.mMsgName.c_str());
	comments(title);
}

void GxsChannelPostItem::loadGroup(const uint32_t &token)
{
#ifdef DEBUG_ITEM
	std::cerr << "GxsChannelGroupItem::loadGroup()";
	std::cerr << std::endl;
#endif

	std::vector<RsGxsChannelGroup> groups;
	if (!rsGxsChannels->getGroupData(token, groups))
	{
		std::cerr << "GxsChannelGroupItem::loadGroup() ERROR getting data";
		std::cerr << std::endl;
		return;
	}

	if (groups.size() != 1)
	{
		std::cerr << "GxsChannelGroupItem::loadGroup() Wrong number of Items";
		std::cerr << std::endl;
		return;
	}

	setGroup(groups[0]);
}

void GxsChannelPostItem::loadMessage(const uint32_t &token)
{
#ifdef DEBUG_ITEM
	std::cerr << "GxsChannelPostItem::loadMessage()";
	std::cerr << std::endl;
#endif

	std::vector<RsGxsChannelPost> posts;
	if (!rsGxsChannels->getPostData(token, posts))
	{
		std::cerr << "GxsChannelPostItem::loadMessage() ERROR getting data";
		std::cerr << std::endl;
		return;
	}
	
	if (posts.size() != 1)	
	{
		std::cerr << "GxsChannelPostItem::loadMessage() Wrong number of Items";
		std::cerr << std::endl;
		return;
	}

	setPost(posts[0]);
}

void GxsChannelPostItem::fill()
{
	/* fill in */

	if (isLoading()) {
		/* Wait for all requests */
		return;
	}

#ifdef DEBUG_ITEM
	std::cerr << "GxsChannelPostItem::fill()";
	std::cerr << std::endl;
#endif

	mInFill = true;

	QString title;

	if (!mIsHome)
	{
		if (mCloseOnRead && !IS_MSG_NEW(mPost.mMeta.mMsgStatus)) {
			removeItem();
		}

		title = tr("Channel Feed") + ": ";
		RetroShareLink link;
		link.createGxsGroupLink(RetroShareLink::TYPE_CHANNEL, mPost.mMeta.mGroupId, groupName());
		title += link.toHtml();
		ui->titleLabel->setText(title);

		RetroShareLink msgLink;
		msgLink.createGxsMessageLink(RetroShareLink::TYPE_CHANNEL, mPost.mMeta.mGroupId, mPost.mMeta.mMsgId, messageName());
		ui->subjectLabel->setText(msgLink.toHtml());

		if (IS_GROUP_SUBSCRIBED(mGroup.mMeta.mSubscribeFlags) || IS_GROUP_ADMIN(mGroup.mMeta.mSubscribeFlags))
		{
			ui->unsubscribeButton->setEnabled(true);
		}
		else 
		{
			ui->unsubscribeButton->setEnabled(false);
		}
		ui->readButton->hide();
		ui->newLabel->hide();
		ui->copyLinkButton->hide();

		if (IS_MSG_NEW(mPost.mMeta.mMsgStatus)) {
			mCloseOnRead = true;
		}
	}
	else
	{
		/* subject */
		ui->titleLabel->setText(QString::fromUtf8(mPost.mMeta.mMsgName.c_str()));

		// fill first 4 lines of message
		ui->subjectLabel->setText(RsHtml().formatText(NULL, RsStringUtil::CopyLines(QString::fromUtf8(mPost.mMsg.c_str()), 4), RSHTML_FORMATTEXT_EMBED_SMILEYS | RSHTML_FORMATTEXT_EMBED_LINKS));
		
		//QString score = QString::number(post.mTopScore);
		// scoreLabel->setText(score); 

		/* disable buttons: deletion facility not enabled with cache services yet */
		ui->clearButton->setEnabled(false);
		ui->unsubscribeButton->setEnabled(false);
		ui->clearButton->hide();
		ui->readAndClearButton->hide();
		ui->unsubscribeButton->hide();
		ui->copyLinkButton->show();

		if (IS_GROUP_SUBSCRIBED(mGroup.mMeta.mSubscribeFlags) || IS_GROUP_ADMIN(mGroup.mMeta.mSubscribeFlags))
		{
			ui->readButton->setVisible(true);

			setReadStatus(IS_MSG_NEW(mPost.mMeta.mMsgStatus), IS_MSG_UNREAD(mPost.mMeta.mMsgStatus) || IS_MSG_NEW(mPost.mMeta.mMsgStatus));
		} 
		else 
		{
			ui->readButton->setVisible(false);
			ui->newLabel->setVisible(false);
		}

		mCloseOnRead = false;
	}
	
	// differences between Feed or Top of Comment.
	if (mFeedHolder)
	{
		if (mIsHome) {
			ui->commentButton->show();
		} else {
			ui->commentButton->hide();
		}

// THIS CODE IS doesn't compile - disabling until fixed.
#if 0
		if (post.mComments)
		{
			QString commentText = QString::number(post.mComments);
			commentText += " ";
			commentText += tr("Comments");
			ui->commentButton->setText(commentText);
		}
		else
		{
			ui->commentButton->setText(tr("Comment"));
		}
#endif

	}
	else
	{
		ui->commentButton->hide();
	}
	
	// disable voting buttons - if they have already voted.
	/*if (post.mMeta.mMsgStatus & GXS_SERV::GXS_MSG_STATUS_VOTE_MASK)
	{
		voteUpButton->setEnabled(false);
		voteDownButton->setEnabled(false);
	}*/

	ui->msgFrame->setVisible(!mPost.mMsg.empty());
	if (wasExpanded() || ui->expandFrame->isVisible()) {
		fillExpandFrame();
	}

	ui->datetimelabel->setText(DateTime::formatLongDateTime(mPost.mMeta.mPublishTs));

	ui->filelabel->setText(QString("(%1 %2) %3").arg(mPost.mCount).arg(tr("Files")).arg(misc::friendlyUnit(mPost.mSize)));

	if (mFileItems.empty() == false) {
		std::list<SubFileItem *>::iterator it;
		for(it = mFileItems.begin(); it != mFileItems.end(); ++it)
		{
			delete(*it);
		}
		mFileItems.clear();
	}

	std::list<RsGxsFile>::const_iterator it;
	for(it = mPost.mFiles.begin(); it != mPost.mFiles.end(); ++it)
	{
		/* add file */
		std::string path;
		SubFileItem *fi = new SubFileItem(it->mHash, it->mName, path, it->mSize, SFI_STATE_REMOTE | SFI_TYPE_CHANNEL, RsPeerId());
		mFileItems.push_back(fi);
		
		/* check if the file is a media file */
		if (!misc::isPreviewable(QFileInfo(QString::fromUtf8(it->mName.c_str())).suffix()))
		{ 
        fi->mediatype();
				/* check if the file is not a media file and change text */
        ui->playButton->setText(tr("Open"));
        ui->playButton->setToolTip(tr("Open File"));
    } else {
        ui->playButton->setText(tr("Play"));
        ui->playButton->setToolTip(tr("Play Media"));
    }

		QLayout *layout = ui->expandFrame->layout();
		layout->addWidget(fi);
	}

	if(mPost.mThumbnail.mData != NULL)
	{
		QPixmap thumbnail;
		thumbnail.loadFromData(mPost.mThumbnail.mData, mPost.mThumbnail.mSize, "PNG");
		// Wiping data - as its been passed to thumbnail.
		ui->logoLabel->setPixmap(thumbnail);
	}

	mInFill = false;
}

void GxsChannelPostItem::fillExpandFrame()
{
	ui->msgLabel->setText(RsHtml().formatText(NULL, QString::fromUtf8(mPost.mMsg.c_str()), RSHTML_FORMATTEXT_EMBED_SMILEYS | RSHTML_FORMATTEXT_EMBED_LINKS));
}

QString GxsChannelPostItem::messageName()
{
	return QString::fromUtf8(mPost.mMeta.mMsgName.c_str());
}

void GxsChannelPostItem::setReadStatus(bool isNew, bool isUnread)
{
	if (isUnread)
	{
		ui->readButton->setChecked(true);
		ui->readButton->setIcon(QIcon(":/images/message-state-unread.png"));
	}
	else
	{
		ui->readButton->setChecked(false);
		ui->readButton->setIcon(QIcon(":/images/message-state-read.png"));
	}

	ui->newLabel->setVisible(isNew);

	/* unpolish widget to clear the stylesheet's palette cache */
	ui->frame->style()->unpolish(ui->frame);

	QPalette palette = ui->frame->palette();
	palette.setColor(ui->frame->backgroundRole(), isNew ? COLOR_NEW : COLOR_NORMAL); // QScrollArea
	palette.setColor(QPalette::Base, isNew ? COLOR_NEW : COLOR_NORMAL); // QTreeWidget
	ui->frame->setPalette(palette);

	ui->frame->setProperty("new", isNew);
	Rshare::refreshStyleSheet(ui->frame, false);
}

void GxsChannelPostItem::setFileCleanUpWarning(uint32_t time_left)
{
	int hours = (int)time_left/3600;
	int minutes = (time_left - hours*3600)%60;

	ui->warning_label->setText(tr("Warning! You have less than %1 hours and %2 minute before this file is deleted Consider saving it.").arg(
			QString::number(hours)).arg(QString::number(minutes)));

	QFont warnFont = ui->warning_label->font();
	warnFont.setBold(true);
	ui->warning_label->setFont(warnFont);

	ui->warn_image_label->setVisible(true);
	ui->warning_label->setVisible(true);
}

void GxsChannelPostItem::updateItem()
{
	/* fill in */

#ifdef DEBUG_ITEM
	std::cerr << "GxsChannelPostItem::updateItem()";
	std::cerr << std::endl;
#endif

	int msec_rate = 10000;

	int downloadCount = 0;
	int downloadStartable = 0;
	int playCount = 0;
	int playStartable = 0;
	bool startable;
	bool loopAgain = false;

	/* Very slow Tick to check when all files are downloaded */
	std::list<SubFileItem *>::iterator it;
	for(it = mFileItems.begin(); it != mFileItems.end(); ++it)
	{
		SubFileItem *item = *it;

		if (item->isDownloadable(startable)) {
			++downloadCount;
			if (startable) {
				++downloadStartable;
			}
		}
		if (item->isPlayable(startable)) {
			++playCount;
			if (startable) {
				++playStartable;
			}
		}

		if (!item->done())
		{
			/* loop again */
			loopAgain = true;
		}
	}

	if (downloadCount) {
		ui->downloadButton->show();

		if (downloadStartable) {
			ui->downloadButton->setEnabled(true);
		} else {
			ui->downloadButton->setEnabled(false);
		}
	} else {
		ui->downloadButton->hide();
	}
	if (playCount) {
		/* one file is playable */
		ui->playButton->show();

		if (playStartable == 1) {
			ui->playButton->setEnabled(true);
		} else {
			ui->playButton->setEnabled(false);
		}
	} else {
		ui->playButton->hide();
	}

	if (loopAgain) {
		QTimer::singleShot( msec_rate, this, SLOT(updateItem(void)));
	}

	// HACK TO DISPLAY COMMENT BUTTON FOR NOW.
	//downloadButton->show();
	//downloadButton->setEnabled(true);
}

void GxsChannelPostItem::doExpand(bool open)
{
	if (mFeedHolder)
	{
		mFeedHolder->lockLayout(this, true);
	}

	if (open)
	{
		ui->expandFrame->show();
		ui->expandButton->setIcon(QIcon(QString(":/images/edit_remove24.png")));
		ui->expandButton->setToolTip(tr("Hide"));

		readToggled(false);
	}
	else
	{
		ui->expandFrame->hide();
		ui->expandButton->setIcon(QIcon(QString(":/images/edit_add24.png")));
		ui->expandButton->setToolTip(tr("Expand"));
	}

	emit sizeChanged(this);

	if (mFeedHolder)
	{
		mFeedHolder->lockLayout(this, false);
	}
}

void GxsChannelPostItem::expandFill(bool first)
{
	GxsFeedItem::expandFill(first);

	if (first) {
		fillExpandFrame();
	}
}

void GxsChannelPostItem::toggle()
{
	expand(ui->expandFrame->isHidden());
}

/*********** SPECIFIC FUNCTIONS ***********************/

void GxsChannelPostItem::readAndClearItem()
{
#ifdef DEBUG_ITEM
	std::cerr << "GxsChannelPostItem::readAndClearItem()";
	std::cerr << std::endl;
#endif

	readToggled(false);
	removeItem();
}

void GxsChannelPostItem::unsubscribeChannel()
{
#ifdef DEBUG_ITEM
	std::cerr << "GxsChannelPostItem::unsubscribeChannel()";
	std::cerr << std::endl;
#endif

	unsubscribe();
}

void GxsChannelPostItem::download()
{
	std::list<SubFileItem *>::iterator it;
	for(it = mFileItems.begin(); it != mFileItems.end(); ++it)
	{
		(*it)->download();
	}

	updateItem();
}

void GxsChannelPostItem::play()
{
	std::list<SubFileItem *>::iterator it;
	for(it = mFileItems.begin(); it != mFileItems.end(); ++it)
	{
		bool startable;
		if ((*it)->isPlayable(startable) && startable) {
			(*it)->play();
		}
	}
}

void GxsChannelPostItem::readToggled(bool checked)
{
	if (mInFill) {
		return;
	}

	mCloseOnRead = false;

	RsGxsGrpMsgIdPair msgPair = std::make_pair(groupId(), messageId());

	uint32_t token;
	rsGxsChannels->setMessageReadStatus(token, msgPair, !checked);

	setReadStatus(false, checked);
}

void GxsChannelPostItem::makeDownVote()
{
	RsGxsGrpMsgIdPair msgId;
	msgId.first = mPost.mMeta.mGroupId;
	msgId.second = mPost.mMeta.mMsgId;

	ui->voteUpButton->setEnabled(false);
	ui->voteDownButton->setEnabled(false);

	emit vote(msgId, false);
}

void GxsChannelPostItem::makeUpVote()
{
	RsGxsGrpMsgIdPair msgId;
	msgId.first = mPost.mMeta.mGroupId;
	msgId.second = mPost.mMeta.mMsgId;

	ui->voteUpButton->setEnabled(false);
	ui->voteDownButton->setEnabled(false);

	emit vote(msgId, true);
}