/**
 * @file llimconversation.cpp
 * @brief LLIMConversation class implements the common behavior of LNearbyChatBar
 * @brief and LLIMFloater for hosting both in LLIMContainer
 *
 * $LicenseInfo:firstyear=2012&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2012, Linden Research, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#include "llviewerprecompiledheaders.h"

#include "llimconversation.h"

#include "llchatentry.h"
#include "llchathistory.h"
#include "llchiclet.h"
#include "llchicletbar.h"
#include "lldraghandle.h"
#include "llfloaterreg.h"
#include "llimfloater.h"
#include "llimfloatercontainer.h" // to replace separate IM Floaters with multifloater container
#include "lllayoutstack.h"
#include "llnearbychat.h"

const F32 REFRESH_INTERVAL = 0.2f;

LLIMConversation::LLIMConversation(const LLSD& session_id)
  : LLTransientDockableFloater(NULL, true, session_id)
  ,  mIsP2PChat(false)
  ,  mExpandCollapseBtn(NULL)
  ,  mTearOffBtn(NULL)
  ,  mCloseBtn(NULL)
  ,  mSessionID(session_id.asUUID())
//  , mParticipantList(NULL)
  , mConversationsRoot(NULL)
  , mChatHistory(NULL)
  , mInputEditor(NULL)
  , mInputEditorTopPad(0)
  , mRefreshTimer(new LLTimer())
{
	mSession = LLIMModel::getInstance()->findIMSession(mSessionID);

	mCommitCallbackRegistrar.add("IMSession.Menu.Action",
			boost::bind(&LLIMConversation::onIMSessionMenuItemClicked,  this, _2));
	mEnableCallbackRegistrar.add("IMSession.Menu.CompactExpandedModes.CheckItem",
			boost::bind(&LLIMConversation::onIMCompactExpandedMenuItemCheck, this, _2));
	mEnableCallbackRegistrar.add("IMSession.Menu.ShowModes.CheckItem",
			boost::bind(&LLIMConversation::onIMShowModesMenuItemCheck,   this, _2));
	mEnableCallbackRegistrar.add("IMSession.Menu.ShowModes.Enable",
			boost::bind(&LLIMConversation::onIMShowModesMenuItemEnable,  this, _2));

	// Zero expiry time is set only once to allow initial update.
	mRefreshTimer->setTimerExpirySec(0);
	mRefreshTimer->start();
}

LLIMConversation::~LLIMConversation()
{
	/*
	if (mParticipantList)
	{
		delete mParticipantList;
		mParticipantList = NULL;
	}
	 */

	delete mRefreshTimer;
}

//static
LLIMConversation* LLIMConversation::findConversation(const LLUUID& uuid)
{
	LLIMConversation* conv;

	if (uuid.isNull())
	{
		conv = LLFloaterReg::findTypedInstance<LLIMConversation>("nearby_chat");
	}
	else
	{
		conv = LLFloaterReg::findTypedInstance<LLIMConversation>("impanel", LLSD(uuid));
	}

	return conv;
};

//static
LLIMConversation* LLIMConversation::getConversation(const LLUUID& uuid)
{
	LLIMConversation* conv;

	if (uuid.isNull())
	{
		conv = LLFloaterReg::getTypedInstance<LLIMConversation>("nearby_chat");
	}
	else
	{
		conv = LLFloaterReg::getTypedInstance<LLIMConversation>("impanel", LLSD(uuid));
	}

	return conv;
};


BOOL LLIMConversation::postBuild()
{
	BOOL result;

	mCloseBtn = getChild<LLButton>("close_btn");
	mCloseBtn->setCommitCallback(boost::bind(&LLFloater::onClickClose, this));

	mExpandCollapseBtn = getChild<LLButton>("expand_collapse_btn");
	mExpandCollapseBtn->setClickedCallback(boost::bind(&LLIMConversation::onSlide, this));

	mTearOffBtn = getChild<LLButton>("tear_off_btn");
	mTearOffBtn->setCommitCallback(boost::bind(&LLIMConversation::onTearOffClicked, this));

	mParticipantListPanel = getChild<LLLayoutPanel>("speakers_list_panel");
	
	// Create a root view folder for all participants
	LLConversationItem* base_item = new LLConversationItem(mConversationViewModel);
    LLFolderView::Params p(LLUICtrlFactory::getDefaultParams<LLFolderView>());
    p.rect = LLRect(0, 0, getRect().getWidth(), 0);
    p.parent_panel = mParticipantListPanel;
    p.listener = base_item;
    p.view_model = &mConversationViewModel;
    p.root = NULL;
    p.use_ellipses = true;
	mConversationsRoot = LLUICtrlFactory::create<LLFolderView>(p);
    mConversationsRoot->setCallbackRegistrar(&mCommitCallbackRegistrar);
	
	// Add a scroller for the folder (participant) view
	LLRect scroller_view_rect = mParticipantListPanel->getRect();
	scroller_view_rect.translate(-scroller_view_rect.mLeft, -scroller_view_rect.mBottom);
	LLScrollContainer::Params scroller_params(LLUICtrlFactory::getDefaultParams<LLFolderViewScrollContainer>());
	scroller_params.rect(scroller_view_rect);
	LLScrollContainer* scroller = LLUICtrlFactory::create<LLFolderViewScrollContainer>(scroller_params);
	scroller->setFollowsAll();
	
	// Insert that scroller into the panel widgets hierarchy and folder view
	mParticipantListPanel->addChild(scroller);
	scroller->addChild(mConversationsRoot);
	mConversationsRoot->setScrollContainer(scroller);
	mConversationsRoot->setFollowsAll();
	mConversationsRoot->addChild(mConversationsRoot->mStatusTextBox);
	
	
	mChatHistory = getChild<LLChatHistory>("chat_history");

	mInputEditor = getChild<LLChatEntry>("chat_editor");
	mInputEditor->setTextExpandedCallback(boost::bind(&LLIMConversation::reshapeChatHistory, this));
	mInputEditor->setCommitOnFocusLost( FALSE );
	mInputEditor->setPassDelete(TRUE);
	mInputEditor->setFont(LLViewerChat::getChatFont());

	mInputEditorTopPad = mChatHistory->getRect().mBottom - mInputEditor->getRect().mTop;

	setOpenPositioning(LLFloaterEnums::POSITIONING_RELATIVE);

	buildConversationViewParticipant();

	updateHeaderAndToolbar();

	mSaveRect = isTornOff();
	initRectControl();

	if (isChatMultiTab())
	{
		if (mIsNearbyChat)
		{
			setCanClose(FALSE);
		}
		result = LLFloater::postBuild();
	}
	else
	{
		result = LLDockableFloater::postBuild();
	}

	return result;
}

LLParticipantList* LLIMConversation::getParticipantList()
{
	return dynamic_cast<LLParticipantList*>(LLIMFloaterContainer::getInstance()->getSessionModel(mSessionID));
}

void LLIMConversation::draw()
{
	LLTransientDockableFloater::draw();

	if (mRefreshTimer->hasExpired())
	{
		if (getParticipantList())
		{
			getParticipantList()->update();
		}

		refresh();
		updateHeaderAndToolbar();

		// Restart the refresh timer
		mRefreshTimer->setTimerExpirySec(REFRESH_INTERVAL);
	}
}

void LLIMConversation::enableDisableCallBtn()
{
    getChildView("voice_call_btn")->setEnabled(
    		mSessionID.notNull()
    		&& mSession
    		&& mSession->mSessionInitialized
    		&& LLVoiceClient::getInstance()->voiceEnabled()
    		&& LLVoiceClient::getInstance()->isVoiceWorking()
    		&& mSession->mCallBackEnabled);
}


void LLIMConversation::onFocusReceived()
{
	setBackgroundOpaque(true);

	if (mSessionID.notNull())
	{
		LLChicletBar::getInstance()->getChicletPanel()->setChicletToggleState(mSessionID, true);

		if (getVisible())
		{
			// suppress corresponding toast only if this floater is visible and have focus
			LLIMModel::getInstance()->setActiveSessionID(mSessionID);
			LLIMModel::instance().sendNoUnreadMessages(mSessionID);
		}
	}

	LLTransientDockableFloater::onFocusReceived();
}

void LLIMConversation::onFocusLost()
{
	setBackgroundOpaque(false);
	LLTransientDockableFloater::onFocusLost();
}

std::string LLIMConversation::appendTime()
{
	time_t utc_time;
	utc_time = time_corrected();
	std::string timeStr ="["+ LLTrans::getString("TimeHour")+"]:["
		+LLTrans::getString("TimeMin")+"]";

	LLSD substitution;

	substitution["datetime"] = (S32) utc_time;
	LLStringUtil::format (timeStr, substitution);

	return timeStr;
}

void LLIMConversation::appendMessage(const LLChat& chat, const LLSD &args)
{
	// Update the participant activity time
	LLIMFloaterContainer* im_box = LLIMFloaterContainer::findInstance();
	if (im_box)
	{
		im_box->setTimeNow(mSessionID,chat.mFromID);
	}
	

	LLChat& tmp_chat = const_cast<LLChat&>(chat);

	if(tmp_chat.mTimeStr.empty())
		tmp_chat.mTimeStr = appendTime();

	if (!chat.mMuted)
	{
		tmp_chat.mFromName = chat.mFromName;
		LLSD chat_args;
		if (args) chat_args = args;
		chat_args["use_plain_text_chat_history"] =
				gSavedSettings.getBOOL("PlainTextChatHistory");
		chat_args["show_time"] = gSavedSettings.getBOOL("IMShowTime");
		chat_args["show_names_for_p2p_conv"] =
				!mIsP2PChat || gSavedSettings.getBOOL("IMShowNamesForP2PConv");

		if (mChatHistory)
		{
			mChatHistory->appendMessage(chat, chat_args);
		}
	}
}


void LLIMConversation::buildConversationViewParticipant()
{
	// Clear the widget list since we are rebuilding afresh from the model
	conversations_widgets_map::iterator widget_it = mConversationsWidgets.begin();
	while (widget_it != mConversationsWidgets.end())
	{
		removeConversationViewParticipant(widget_it->first);
		// Iterators are invalidated by erase so we need to pick begin again
		widget_it = mConversationsWidgets.begin();
	}
	
	// Get the model list
	LLParticipantList* item = getParticipantList();
	if (!item)
	{
		// Nothing to do if the model list is empty
		return;
	}

	// Create the participants widgets now
	LLFolderViewModelItemCommon::child_list_t::const_iterator current_participant_model = item->getChildrenBegin();
	LLFolderViewModelItemCommon::child_list_t::const_iterator end_participant_model = item->getChildrenEnd();
	while (current_participant_model != end_participant_model)
	{
		LLConversationItem* participant_model = dynamic_cast<LLConversationItem*>(*current_participant_model);
		addConversationViewParticipant(participant_model);
		current_participant_model++;
	}
}

void LLIMConversation::addConversationViewParticipant(LLConversationItem* participant_model)
{
	// Check if the model already has an associated view
	LLUUID uuid = participant_model->getUUID();
	LLFolderViewItem* widget = get_ptr_in_map(mConversationsWidgets,uuid);
	
	// If not already present, create the participant view and attach it to the root, otherwise, just refresh it
	if (widget)
	{
		updateConversationViewParticipant(uuid); // overkill?
	}
	else
	{
		LLConversationViewParticipant* participant_view = createConversationViewParticipant(participant_model);
		mConversationsWidgets[uuid] = participant_view;
		participant_view->addToFolder(mConversationsRoot);
		participant_view->setVisible(TRUE);
		refreshConversation();
	}
}

void LLIMConversation::removeConversationViewParticipant(const LLUUID& participant_id)
{
	LLFolderViewItem* widget = get_ptr_in_map(mConversationsWidgets,participant_id);
	if (widget)
	{
		mConversationsRoot->extractItem(widget);
		delete widget;
		mConversationsWidgets.erase(participant_id);
		refreshConversation();
	}
}

void LLIMConversation::updateConversationViewParticipant(const LLUUID& participant_id)
{
	LLFolderViewItem* widget = get_ptr_in_map(mConversationsWidgets,participant_id);
	if (widget)
	{
		widget->refresh();
		refreshConversation();
	}
}

void LLIMConversation::refreshConversation()
{
	// *TODO: check that all participant models do have a view (debug consistency check)
	mConversationViewModel.requestSortAll();
	mConversationsRoot->arrangeAll();
	mConversationsRoot->update();
}

// Copied from LLIMFloaterContainer::createConversationViewParticipant(). Refactor opportunity!
LLConversationViewParticipant* LLIMConversation::createConversationViewParticipant(LLConversationItem* item)
{
    LLRect panel_rect = mParticipantListPanel->getRect();
	
	LLConversationViewParticipant::Params params;
	params.name = item->getDisplayName();
	params.root = mConversationsRoot;
	params.listener = item;
	params.rect = LLRect (0, 24, panel_rect.getWidth(), 0); // *TODO: use conversation_view_participant.xml itemHeight value in lieu of 24
	params.tool_tip = params.name;
	params.participant_id = item->getUUID();
	
	return LLUICtrlFactory::create<LLConversationViewParticipant>(params);
}

void LLIMConversation::onSortMenuItemClicked(const LLSD& userdata)
{
	// TODO: Check this code when sort order menu will be added. (EM)
	if (!getParticipantList())
	{
		return;
	}

	std::string chosen_item = userdata.asString();

	if (chosen_item == "sort_name")
	{
		getParticipantList()->setSortOrder(LLParticipantList::E_SORT_BY_NAME);
	}

}

void LLIMConversation::onIMSessionMenuItemClicked(const LLSD& userdata)
{
	std::string item = userdata.asString();

	if (item == "compact_view" || item == "expanded_view")
	{
		gSavedSettings.setBOOL("PlainTextChatHistory", item == "compact_view");
	}
	else
	{
		bool prev_value = gSavedSettings.getBOOL(item);
		gSavedSettings.setBOOL(item, !prev_value);
	}

	LLIMConversation::processChatHistoryStyleUpdate();
}


bool LLIMConversation::onIMCompactExpandedMenuItemCheck(const LLSD& userdata)
{
	std::string item = userdata.asString();
	bool is_plain_text_mode = gSavedSettings.getBOOL("PlainTextChatHistory");

	return is_plain_text_mode? item == "compact_view" : item == "expanded_view";
}


bool LLIMConversation::onIMShowModesMenuItemCheck(const LLSD& userdata)
{
	return gSavedSettings.getBOOL(userdata.asString());
}

// enable/disable states for the "show time" and "show names" items of the show-modes menu
bool LLIMConversation::onIMShowModesMenuItemEnable(const LLSD& userdata)
{
	std::string item = userdata.asString();
	bool plain_text = gSavedSettings.getBOOL("PlainTextChatHistory");
	bool is_not_names = (item != "IMShowNamesForP2PConv");
	return (plain_text && (is_not_names || mIsP2PChat));
}

void LLIMConversation::hideOrShowTitle()
{
	const LLFloater::Params& default_params = LLFloater::getDefaultParams();
	S32 floater_header_size = default_params.header_height;
	LLView* floater_contents = getChild<LLView>("contents_view");

	LLRect floater_rect = getLocalRect();
	S32 top_border_of_contents = floater_rect.mTop - (isTornOff()? floater_header_size : 0);
	LLRect handle_rect (0, floater_rect.mTop, floater_rect.mRight, top_border_of_contents);
	LLRect contents_rect (0, top_border_of_contents, floater_rect.mRight, floater_rect.mBottom);
	mDragHandle->setShape(handle_rect);
	mDragHandle->setVisible(isTornOff());
	floater_contents->setShape(contents_rect);
}

void LLIMConversation::hideAllStandardButtons()
{
	for (S32 i = 0; i < BUTTON_COUNT; i++)
	{
		if (mButtons[i])
		{
			// Hide the standard header buttons in a docked IM floater.
			mButtons[i]->setVisible(false);
		}
	}
}

void LLIMConversation::updateHeaderAndToolbar()
{
	// prevent start conversation before its container
    LLIMFloaterContainer::getInstance();

	bool is_torn_off = checkIfTornOff();
	if (!is_torn_off)
	{
		hideAllStandardButtons();
	}

	hideOrShowTitle();

	// Participant list should be visible only in torn off floaters.
	bool is_participant_list_visible =
			is_torn_off
			&& gSavedSettings.getBOOL("IMShowControlPanel")
			&& !mIsP2PChat;

	mParticipantListPanel->setVisible(is_participant_list_visible);

	// Display collapse image (<<) if the floater is hosted
	// or if it is torn off but has an open control panel.
	bool is_expanded = !is_torn_off || is_participant_list_visible;
	mExpandCollapseBtn->setImageOverlay(getString(is_expanded ? "collapse_icon" : "expand_icon"));

	// toggle floater's drag handle and title visibility
	if (mDragHandle)
	{
		mDragHandle->setTitleVisible(is_torn_off);
	}

	// The button (>>) should be disabled for torn off P2P conversations.
	mExpandCollapseBtn->setEnabled(!is_torn_off || !mIsP2PChat);

	mTearOffBtn->setImageOverlay(getString(is_torn_off? "return_icon" : "tear_off_icon"));
	mTearOffBtn->setToolTip(getString(!is_torn_off? "tooltip_to_separate_window" : "tooltip_to_main_window"));

	mCloseBtn->setVisible(!is_torn_off && !mIsNearbyChat);

	enableDisableCallBtn();

	showTranslationCheckbox();
}

void LLIMConversation::reshapeChatHistory()
{
	LLRect chat_rect  = mChatHistory->getRect();
	LLRect input_rect = mInputEditor->getRect();

	int delta_height = chat_rect.mBottom - (input_rect.mTop + mInputEditorTopPad);

	chat_rect.setLeftTopAndSize(chat_rect.mLeft, chat_rect.mTop, chat_rect.getWidth(), chat_rect.getHeight() + delta_height);
	mChatHistory->setShape(chat_rect);
}

void LLIMConversation::showTranslationCheckbox(BOOL show)
{
	getChild<LLUICtrl>("translate_chat_checkbox_lp")->setVisible(mIsNearbyChat? show : FALSE);
}

// static
void LLIMConversation::processChatHistoryStyleUpdate()
{
	LLFloaterReg::const_instance_list_t& inst_list = LLFloaterReg::getFloaterList("impanel");
	for (LLFloaterReg::const_instance_list_t::const_iterator iter = inst_list.begin();
			iter != inst_list.end(); ++iter)
	{
		LLIMFloater* floater = dynamic_cast<LLIMFloater*>(*iter);
		if (floater)
		{
			floater->reloadMessages();
		}
	}

	LLNearbyChat* nearby_chat = LLFloaterReg::findTypedInstance<LLNearbyChat>("nearby_chat");
	if (nearby_chat)
	{
             nearby_chat->reloadMessages();
	}
}

void LLIMConversation::updateCallBtnState(bool callIsActive)
{
	getChild<LLButton>("voice_call_btn")->setImageOverlay(
			callIsActive? getString("call_btn_stop") : getString("call_btn_start"));
    enableDisableCallBtn();

}

void LLIMConversation::onSlide(LLIMConversation* self)
{
	LLIMFloaterContainer* host_floater = dynamic_cast<LLIMFloaterContainer*>(self->getHost());
	if (host_floater)
	{
		// Hide the messages pane if a floater is hosted in the Conversations
		host_floater->collapseMessagesPane(true);
	}
	else ///< floater is torn off
	{
		if (!self->mIsP2PChat)
		{
			bool expand = !self->mParticipantListPanel->getVisible();

			// Expand/collapse the IM control panel
			self->mParticipantListPanel->setVisible(expand);

			gSavedSettings.setBOOL("IMShowControlPanel", expand);

			self->mExpandCollapseBtn->setImageOverlay(self->getString(expand ? "collapse_icon" : "expand_icon"));
		}
	}
}

/*virtual*/
void LLIMConversation::onOpen(const LLSD& key)
{
	if (!checkIfTornOff())
	{
		LLIMFloaterContainer* host_floater = dynamic_cast<LLIMFloaterContainer*>(getHost());
		// Show the messages pane when opening a floater hosted in the Conversations
		host_floater->collapseMessagesPane(false);
	}
}

// virtual
void LLIMConversation::onClose(bool app_quitting)
{
	// Always suppress the IM from the conversations list on close if present for any reason
	if (LLIMConversation::isChatMultiTab())
	{
		LLIMFloaterContainer* im_box = LLIMFloaterContainer::findInstance();
		if (im_box)
		{
            im_box->removeConversationListItem(mKey);
        }
    }
}

void LLIMConversation::onTearOffClicked()
{
    setFollows(isTornOff()? FOLLOWS_ALL : FOLLOWS_NONE);
    mSaveRect = isTornOff();
    initRectControl();
	LLFloater::onClickTearOff(this);
	updateHeaderAndToolbar();
}

// static
bool LLIMConversation::isChatMultiTab()
{
	// Restart is required in order to change chat window type.
	return true;
}

bool LLIMConversation::checkIfTornOff()
{
	bool isTorn = !getHost();
	
	if (isTorn != isTornOff())
	{
		setTornOff(isTorn);
		updateHeaderAndToolbar();
	}

	return isTorn;
}