/** 
 * @file llagentwearablesfetch.cpp
 * @brief LLAgentWearblesFetch class implementation
 *
 * $LicenseInfo:firstyear=2001&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, 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 "llagentwearablesfetch.h"

#include "llagent.h"
#include "llagentwearables.h"
#include "llappearancemgr.h"
#include "llinventoryfunctions.h"
#include "llstartup.h"
#include "llvoavatarself.h"


class LLOrderMyOutfitsOnDestroy: public LLInventoryCallback
{
public:
	LLOrderMyOutfitsOnDestroy() {};

	virtual ~LLOrderMyOutfitsOnDestroy()
	{
		if (!LLApp::isRunning())
		{
			llwarns << "called during shutdown, skipping" << llendl;
			return;
		}
		
		const LLUUID& my_outfits_id = gInventory.findCategoryUUIDForType(LLFolderType::FT_MY_OUTFITS);
		if (my_outfits_id.isNull()) return;

		LLInventoryModel::cat_array_t* cats;
		LLInventoryModel::item_array_t* items;
		gInventory.getDirectDescendentsOf(my_outfits_id, cats, items);
		if (!cats) return;

		//My Outfits should at least contain saved initial outfit and one another outfit
		if (cats->size() < 2)
		{
			llwarning("My Outfits category was not populated properly", 0);
			return;
		}

		llinfos << "Starting updating My Outfits with wearables ordering information" << llendl;

		for (LLInventoryModel::cat_array_t::iterator outfit_iter = cats->begin();
			outfit_iter != cats->end(); ++outfit_iter)
		{
			const LLUUID& cat_id = (*outfit_iter)->getUUID();
			if (cat_id.isNull()) continue;

			// saved initial outfit already contains wearables ordering information
			if (cat_id == LLAppearanceMgr::getInstance()->getBaseOutfitUUID()) continue;

			LLAppearanceMgr::getInstance()->updateClothingOrderingInfo(cat_id);
		}

		llinfos << "Finished updating My Outfits with wearables ordering information" << llendl;
	}

	/* virtual */ void fire(const LLUUID& inv_item) {};
};


LLInitialWearablesFetch::LLInitialWearablesFetch(const LLUUID& cof_id) :
	LLInventoryFetchDescendentsObserver(cof_id)
{
}

LLInitialWearablesFetch::~LLInitialWearablesFetch()
{
}

// virtual
void LLInitialWearablesFetch::done()
{
	// Delay processing the actual results of this so it's not handled within
	// gInventory.notifyObservers.  The results will be handled in the next
	// idle tick instead.
	gInventory.removeObserver(this);
	doOnIdleOneTime(boost::bind(&LLInitialWearablesFetch::processContents,this));
}

void LLInitialWearablesFetch::add(InitialWearableData &data)

{
	mAgentInitialWearables.push_back(data);
}

void LLInitialWearablesFetch::processContents()
{
	// Fetch the wearable items from the Current Outfit Folder
	LLInventoryModel::cat_array_t cat_array;
	LLInventoryModel::item_array_t wearable_array;
	LLFindWearables is_wearable;
	gInventory.collectDescendentsIf(mComplete.front(), cat_array, wearable_array, 
									LLInventoryModel::EXCLUDE_TRASH, is_wearable);

	LLAppearanceMgr::instance().setAttachmentInvLinkEnable(true);
	if (wearable_array.count() > 0)
	{
		gAgentWearables.notifyLoadingStarted();
		LLAppearanceMgr::instance().updateAppearanceFromCOF();
	}
	else
	{
		// if we're constructing the COF from the wearables message, we don't have a proper outfit link
		LLAppearanceMgr::instance().setOutfitDirty(true);
		processWearablesMessage();
	}
	delete this;
}

class LLFetchAndLinkObserver: public LLInventoryFetchItemsObserver
{
public:
	LLFetchAndLinkObserver(uuid_vec_t& ids):
		LLInventoryFetchItemsObserver(ids)
	{
	}
	~LLFetchAndLinkObserver()
	{
	}
	virtual void done()
	{
		gInventory.removeObserver(this);

		// Link to all fetched items in COF.
		LLPointer<LLInventoryCallback> link_waiter = new LLUpdateAppearanceOnDestroy;
		for (uuid_vec_t::iterator it = mIDs.begin();
			 it != mIDs.end();
			 ++it)
		{
			LLUUID id = *it;
			LLViewerInventoryItem *item = gInventory.getItem(*it);
			if (!item)
			{
				llwarns << "fetch failed!" << llendl;
				continue;
			}

			link_inventory_item(gAgent.getID(),
								item->getLinkedUUID(),
								LLAppearanceMgr::instance().getCOF(),
								item->getName(),
								item->getDescription(),
								LLAssetType::AT_LINK,
								link_waiter);
		}
	}
};

void LLInitialWearablesFetch::processWearablesMessage()
{
	if (!mAgentInitialWearables.empty()) // We have an empty current outfit folder, use the message data instead.
	{
		const LLUUID current_outfit_id = LLAppearanceMgr::instance().getCOF();
		uuid_vec_t ids;
		for (U8 i = 0; i < mAgentInitialWearables.size(); ++i)
		{
			// Populate the current outfit folder with links to the wearables passed in the message
			InitialWearableData *wearable_data = new InitialWearableData(mAgentInitialWearables[i]); // This will be deleted in the callback.
			
			if (wearable_data->mAssetID.notNull())
			{
				ids.push_back(wearable_data->mItemID);
			}
			else
			{
				llinfos << "Invalid wearable, type " << wearable_data->mType << " itemID "
				<< wearable_data->mItemID << " assetID " << wearable_data->mAssetID << llendl;
				delete wearable_data;
			}
		}

		// Add all current attachments to the requested items as well.
		if (isAgentAvatarValid())
		{
			for (LLVOAvatar::attachment_map_t::const_iterator iter = gAgentAvatarp->mAttachmentPoints.begin(); 
				 iter != gAgentAvatarp->mAttachmentPoints.end(); ++iter)
			{
				LLViewerJointAttachment* attachment = iter->second;
				if (!attachment) continue;
				for (LLViewerJointAttachment::attachedobjs_vec_t::iterator attachment_iter = attachment->mAttachedObjects.begin();
					 attachment_iter != attachment->mAttachedObjects.end();
					 ++attachment_iter)
				{
					LLViewerObject* attached_object = (*attachment_iter);
					if (!attached_object) continue;
					const LLUUID& item_id = attached_object->getAttachmentItemID();
					if (item_id.isNull()) continue;
					ids.push_back(item_id);
				}
			}
		}

		// Need to fetch the inventory items for ids, then create links to them after they arrive.
		LLFetchAndLinkObserver *fetcher = new LLFetchAndLinkObserver(ids);
		fetcher->startFetch();
		// If no items to be fetched, done will never be triggered.
		// TODO: Change LLInventoryFetchItemsObserver::fetchItems to trigger done() on this condition.
		if (fetcher->isFinished())
		{
			fetcher->done();
		}
		else
		{
			gInventory.addObserver(fetcher);
		}
	}
	else
	{
		LL_WARNS("Wearables") << "No current outfit folder items found and no initial wearables fallback message received." << LL_ENDL;
	}
}

LLLibraryOutfitsFetch::LLLibraryOutfitsFetch(const LLUUID& my_outfits_id) : 
	LLInventoryFetchDescendentsObserver(my_outfits_id),
	mCurrFetchStep(LOFS_FOLDER), 
	mOutfitsPopulated(false) 
{
	llinfos << "created" << llendl;

	mMyOutfitsID = LLUUID::null;
	mClothingID = LLUUID::null;
	mLibraryClothingID = LLUUID::null;
	mImportedClothingID = LLUUID::null;
	mImportedClothingName = "Imported Library Clothing";
}

LLLibraryOutfitsFetch::~LLLibraryOutfitsFetch()
{
	llinfos << "destroyed" << llendl;
}

void LLLibraryOutfitsFetch::done()
{
	llinfos << "start" << llendl;

	// Delay this until idle() routine, since it's a heavy operation and
	// we also can't have it run within notifyObservers.
	doOnIdleOneTime(boost::bind(&LLLibraryOutfitsFetch::doneIdle,this));
	gInventory.removeObserver(this); // Prevent doOnIdleOneTime from being added twice.
}

void LLLibraryOutfitsFetch::doneIdle()
{
	llinfos << "start" << llendl;

	gInventory.addObserver(this); // Add this back in since it was taken out during ::done()
	
	switch (mCurrFetchStep)
	{
		case LOFS_FOLDER:
			folderDone();
			mCurrFetchStep = LOFS_OUTFITS;
			break;
		case LOFS_OUTFITS:
			outfitsDone();
			mCurrFetchStep = LOFS_LIBRARY;
			break;
		case LOFS_LIBRARY:
			libraryDone();
			mCurrFetchStep = LOFS_IMPORTED;
			break;
		case LOFS_IMPORTED:
			importedFolderDone();
			mCurrFetchStep = LOFS_CONTENTS;
			break;
		case LOFS_CONTENTS:
			contentsDone();
			break;
		default:
			llwarns << "Got invalid state for outfit fetch: " << mCurrFetchStep << llendl;
			mOutfitsPopulated = TRUE;
			break;
	}

	// We're completely done.  Cleanup.
	if (mOutfitsPopulated)
	{
		gInventory.removeObserver(this);
		delete this;
		return;
	}
}

void LLLibraryOutfitsFetch::folderDone()
{
	llinfos << "start" << llendl;

	LLInventoryModel::cat_array_t cat_array;
	LLInventoryModel::item_array_t wearable_array;
	gInventory.collectDescendents(mMyOutfitsID, cat_array, wearable_array, 
								  LLInventoryModel::EXCLUDE_TRASH);
	
	// Early out if we already have items in My Outfits
	// except the case when My Outfits contains just initial outfit
	if (cat_array.count() > 1)
	{
		mOutfitsPopulated = true;
		return;
	}

	mClothingID = gInventory.findCategoryUUIDForType(LLFolderType::FT_CLOTHING);
	mLibraryClothingID = gInventory.findCategoryUUIDForType(LLFolderType::FT_CLOTHING, false, true);

	// If Library->Clothing->Initial Outfits exists, use that.
	LLNameCategoryCollector matchFolderFunctor("Initial Outfits");
	cat_array.clear();
	gInventory.collectDescendentsIf(mLibraryClothingID,
									cat_array, wearable_array, 
									LLInventoryModel::EXCLUDE_TRASH,
									matchFolderFunctor);
	if (cat_array.count() > 0)
	{
		const LLViewerInventoryCategory *cat = cat_array.get(0);
		mLibraryClothingID = cat->getUUID();
	}

	mComplete.clear();
	
	// Get the complete information on the items in the inventory.
	uuid_vec_t folders;
	folders.push_back(mClothingID);
	folders.push_back(mLibraryClothingID);
	setFetchIDs(folders);
	startFetch();
	if (isFinished())
	{
		done();
	}
}

void LLLibraryOutfitsFetch::outfitsDone()
{
	llinfos << "start" << llendl;

	LLInventoryModel::cat_array_t cat_array;
	LLInventoryModel::item_array_t wearable_array;
	uuid_vec_t folders;
	
	// Collect the contents of the Library's Clothing folder
	gInventory.collectDescendents(mLibraryClothingID, cat_array, wearable_array, 
								  LLInventoryModel::EXCLUDE_TRASH);
	
	llassert(cat_array.count() > 0);
	for (LLInventoryModel::cat_array_t::const_iterator iter = cat_array.begin();
		 iter != cat_array.end();
		 ++iter)
	{
		const LLViewerInventoryCategory *cat = iter->get();
		
		// Get the names and id's of every outfit in the library, skip "Ruth"
		// because it's a low quality legacy outfit
		if (cat->getName() != "Ruth")
		{
			// Get the name of every outfit in the library 
			folders.push_back(cat->getUUID());
			mLibraryClothingFolders.push_back(cat->getUUID());
		}
	}
	cat_array.clear();
	wearable_array.clear();

	// Check if you already have an "Imported Library Clothing" folder
	LLNameCategoryCollector matchFolderFunctor(mImportedClothingName);
	gInventory.collectDescendentsIf(mClothingID, 
									cat_array, wearable_array, 
									LLInventoryModel::EXCLUDE_TRASH,
									matchFolderFunctor);
	if (cat_array.size() > 0)
	{
		const LLViewerInventoryCategory *cat = cat_array.get(0);
		mImportedClothingID = cat->getUUID();
	}
	
	mComplete.clear();
	setFetchIDs(folders);
	startFetch();
	if (isFinished())
	{
		done();
	}
}

class LLLibraryOutfitsCopyDone: public LLInventoryCallback
{
public:
	LLLibraryOutfitsCopyDone(LLLibraryOutfitsFetch * fetcher):
	mFireCount(0), mLibraryOutfitsFetcher(fetcher)
	{
	}
	
	virtual ~LLLibraryOutfitsCopyDone()
	{
		if (!LLApp::isExiting() && mLibraryOutfitsFetcher)
		{
			gInventory.addObserver(mLibraryOutfitsFetcher);
			mLibraryOutfitsFetcher->done();
		}
	}
	
	/* virtual */ void fire(const LLUUID& inv_item)
	{
		mFireCount++;
	}
private:
	U32 mFireCount;
	LLLibraryOutfitsFetch * mLibraryOutfitsFetcher;
};

// Copy the clothing folders from the library into the imported clothing folder
void LLLibraryOutfitsFetch::libraryDone()
{
	llinfos << "start" << llendl;

	if (mImportedClothingID != LLUUID::null)
	{
		// Skip straight to fetching the contents of the imported folder
		importedFolderFetch();
		return;
	}

	// Remove observer; next autopopulation step will be triggered externally by LLLibraryOutfitsCopyDone.
	gInventory.removeObserver(this);
	
	LLPointer<LLInventoryCallback> copy_waiter = new LLLibraryOutfitsCopyDone(this);
	mImportedClothingID = gInventory.createNewCategory(mClothingID,
													   LLFolderType::FT_NONE,
													   mImportedClothingName);
	// Copy each folder from library into clothing unless it already exists.
	for (uuid_vec_t::const_iterator iter = mLibraryClothingFolders.begin();
		 iter != mLibraryClothingFolders.end();
		 ++iter)
	{
		const LLUUID& src_folder_id = (*iter); // Library clothing folder ID
		const LLViewerInventoryCategory *cat = gInventory.getCategory(src_folder_id);
		if (!cat)
		{
			llwarns << "Library folder import for uuid:" << src_folder_id << " failed to find folder." << llendl;
			continue;
		}
		
		if (!LLAppearanceMgr::getInstance()->getCanMakeFolderIntoOutfit(src_folder_id))
		{
			llinfos << "Skipping non-outfit folder name:" << cat->getName() << llendl;
			continue;
		}
		
		// Don't copy the category if it already exists.
		LLNameCategoryCollector matchFolderFunctor(cat->getName());
		LLInventoryModel::cat_array_t cat_array;
		LLInventoryModel::item_array_t wearable_array;
		gInventory.collectDescendentsIf(mImportedClothingID, 
										cat_array, wearable_array, 
										LLInventoryModel::EXCLUDE_TRASH,
										matchFolderFunctor);
		if (cat_array.size() > 0)
		{
			continue;
		}

		LLUUID dst_folder_id = gInventory.createNewCategory(mImportedClothingID,
															LLFolderType::FT_NONE,
															cat->getName());
		LLAppearanceMgr::getInstance()->shallowCopyCategoryContents(src_folder_id, dst_folder_id, copy_waiter);
	}
}

void LLLibraryOutfitsFetch::importedFolderFetch()
{
	llinfos << "start" << llendl;

	// Fetch the contents of the Imported Clothing Folder
	uuid_vec_t folders;
	folders.push_back(mImportedClothingID);
	
	mComplete.clear();
	setFetchIDs(folders);
	startFetch();
	if (isFinished())
	{
		done();
	}
}

void LLLibraryOutfitsFetch::importedFolderDone()
{
	llinfos << "start" << llendl;

	LLInventoryModel::cat_array_t cat_array;
	LLInventoryModel::item_array_t wearable_array;
	uuid_vec_t folders;
	
	// Collect the contents of the Imported Clothing folder
	gInventory.collectDescendents(mImportedClothingID, cat_array, wearable_array, 
								  LLInventoryModel::EXCLUDE_TRASH);
	
	for (LLInventoryModel::cat_array_t::const_iterator iter = cat_array.begin();
		 iter != cat_array.end();
		 ++iter)
	{
		const LLViewerInventoryCategory *cat = iter->get();
		
		// Get the name of every imported outfit
		folders.push_back(cat->getUUID());
		mImportedClothingFolders.push_back(cat->getUUID());
	}
	
	mComplete.clear();
	setFetchIDs(folders);
	startFetch();
	if (isFinished())
	{
		done();
	}
}

void LLLibraryOutfitsFetch::contentsDone()
{		
	llinfos << "start" << llendl;

	LLInventoryModel::cat_array_t cat_array;
	LLInventoryModel::item_array_t wearable_array;
	
	LLPointer<LLOrderMyOutfitsOnDestroy> order_myoutfits_on_destroy = new LLOrderMyOutfitsOnDestroy;

	for (uuid_vec_t::const_iterator folder_iter = mImportedClothingFolders.begin();
		 folder_iter != mImportedClothingFolders.end();
		 ++folder_iter)
	{
		const LLUUID &folder_id = (*folder_iter);
		const LLViewerInventoryCategory *cat = gInventory.getCategory(folder_id);
		if (!cat)
		{
			llwarns << "Library folder import for uuid:" << folder_id << " failed to find folder." << llendl;
			continue;
		}

		//initial outfit should be already in My Outfits
		if (cat->getName() == LLStartUp::getInitialOutfitName()) continue;
		
		// First, make a folder in the My Outfits directory.
		LLUUID new_outfit_folder_id = gInventory.createNewCategory(mMyOutfitsID, LLFolderType::FT_OUTFIT, cat->getName());
		
		cat_array.clear();
		wearable_array.clear();
		// Collect the contents of each imported clothing folder, so we can create new outfit links for it
		gInventory.collectDescendents(folder_id, cat_array, wearable_array, 
									  LLInventoryModel::EXCLUDE_TRASH);
		
		for (LLInventoryModel::item_array_t::const_iterator wearable_iter = wearable_array.begin();
			 wearable_iter != wearable_array.end();
			 ++wearable_iter)
		{
			const LLViewerInventoryItem *item = wearable_iter->get();
			link_inventory_item(gAgent.getID(),
								item->getLinkedUUID(),
								new_outfit_folder_id,
								item->getName(),
								item->getDescription(),
								LLAssetType::AT_LINK,
								order_myoutfits_on_destroy);
		}
	}

	mOutfitsPopulated = true;
}