/** 
 * @file llfloatercreatelandmark.cpp
 * @brief LLFloaterCreateLandmark class implementation
 *
 * $LicenseInfo:firstyear=2021&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2021, 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 "llfloatercreatelandmark.h"

#include "llagent.h"
#include "llagentui.h"
#include "llcombobox.h"
#include "llinventoryfunctions.h"
#include "llinventoryobserver.h"
#include "lllandmarkactions.h"
#include "llnotificationsutil.h"
#include "llpanellandmarkinfo.h"
#include "llparcel.h"
#include "lltextbox.h"
#include "lltexteditor.h"
#include "lluictrlfactory.h"
#include "llviewermessage.h"
#include "llviewerparcelmgr.h"
#include "llviewerregion.h"

typedef std::pair<LLUUID, std::string> folder_pair_t;

class LLLandmarksInventoryObserver : public LLInventoryObserver
{
public:
	LLLandmarksInventoryObserver(LLFloaterCreateLandmark* create_landmark_floater) :
		mFloater(create_landmark_floater)
	{}

    void changed(U32 mask) override
    {
        if (mFloater->getItem())
        {
            checkChanged(mask);
        }
        else
        {
            checkCreated(mask);
        }
    }

protected:
	void checkCreated(U32 mask)
	{
        if (gInventory.getAddedIDs().empty())
        {
            return;
        }

        if (!(mask & LLInventoryObserver::ADD) ||
            !(mask & LLInventoryObserver::CREATE) ||
            !(mask & LLInventoryObserver::UPDATE_CREATE))
        {
            return;
        }

		mFloater->setItem(gInventory.getAddedIDs());
	}

    void checkChanged(U32 mask)
    {
        if (gInventory.getChangedIDs().empty())
        {
            return;
        }

        if ((mask & LLInventoryObserver::LABEL) ||
            (mask & LLInventoryObserver::INTERNAL) ||
            (mask & LLInventoryObserver::REMOVE) ||
            (mask & LLInventoryObserver::STRUCTURE) ||
            (mask & LLInventoryObserver::REBUILD))
        {
            mFloater->updateItem(gInventory.getChangedIDs(), mask);
        }
    }

private:
	LLFloaterCreateLandmark* mFloater;
};

LLFloaterCreateLandmark::LLFloaterCreateLandmark(const LLSD& key)
	:	LLFloater("add_landmark"),
		mItem(NULL)
{
	mInventoryObserver = new LLLandmarksInventoryObserver(this);
}

LLFloaterCreateLandmark::~LLFloaterCreateLandmark()
{
	removeObserver();
}

BOOL LLFloaterCreateLandmark::postBuild()
{
	mFolderCombo = getChild<LLComboBox>("folder_combo");
	mLandmarkTitleEditor = getChild<LLLineEditor>("title_editor");
	mNotesEditor = getChild<LLTextEditor>("notes_editor");

	getChild<LLTextBox>("new_folder_textbox")->setURLClickedCallback(boost::bind(&LLFloaterCreateLandmark::onCreateFolderClicked, this));
	getChild<LLButton>("ok_btn")->setClickedCallback(boost::bind(&LLFloaterCreateLandmark::onSaveClicked, this));
	getChild<LLButton>("cancel_btn")->setClickedCallback(boost::bind(&LLFloaterCreateLandmark::onCancelClicked, this));

    mLandmarkTitleEditor->setCommitCallback([this](LLUICtrl* ctrl, const LLSD& param) { onCommitTextChanges(); });
    mNotesEditor->setCommitCallback([this](LLUICtrl* ctrl, const LLSD& param) { onCommitTextChanges(); });

	mLandmarksID = gInventory.findCategoryUUIDForType(LLFolderType::FT_LANDMARK);

	return TRUE;
}

void LLFloaterCreateLandmark::removeObserver()
{
	if (gInventory.containsObserver(mInventoryObserver))
		gInventory.removeObserver(mInventoryObserver);
}

void LLFloaterCreateLandmark::onOpen(const LLSD& key)
{
	LLUUID dest_folder = LLUUID();
	if (key.has("dest_folder"))
	{
		dest_folder = key["dest_folder"].asUUID();
	}
	mItem = NULL;
	gInventory.addObserver(mInventoryObserver);
	setLandmarkInfo(dest_folder);
	populateFoldersList(dest_folder);
}

void LLFloaterCreateLandmark::setLandmarkInfo(const LLUUID &folder_id)
{
	LLViewerParcelMgr* parcel_mgr = LLViewerParcelMgr::getInstance();
	LLParcel* parcel = parcel_mgr->getAgentParcel();
	std::string name = parcel->getName();
	LLVector3 agent_pos = gAgent.getPositionAgent();

	if (name.empty())
	{
		S32 region_x = ll_round(agent_pos.mV[VX]);
		S32 region_y = ll_round(agent_pos.mV[VY]);
		S32 region_z = ll_round(agent_pos.mV[VZ]);

		std::string region_name;
		LLViewerRegion* region = parcel_mgr->getSelectionRegion();
		if (region)
		{
			region_name = region->getName();
		}
		else
		{
			std::string desc;
			LLAgentUI::buildLocationString(desc, LLAgentUI::LOCATION_FORMAT_NORMAL, agent_pos);
			region_name = desc;
		}

		mLandmarkTitleEditor->setText(llformat("%s (%d, %d, %d)",
			region_name.c_str(), region_x, region_y, region_z));
	}
	else
	{
		mLandmarkTitleEditor->setText(name);
	}

	LLLandmarkActions::createLandmarkHere(name, "", folder_id.notNull() ? folder_id : gInventory.findCategoryUUIDForType(LLFolderType::FT_FAVORITE));
}

bool cmp_folders(const folder_pair_t& left, const folder_pair_t& right)
{
	return left.second < right.second;
}

void LLFloaterCreateLandmark::populateFoldersList(const LLUUID &folder_id)
{
	// Collect all folders that can contain landmarks.
	LLInventoryModel::cat_array_t cats;
	LLPanelLandmarkInfo::collectLandmarkFolders(cats);

	mFolderCombo->removeall();

	// Put the "My Favorites" folder first in list.
	LLUUID favorites_id = gInventory.findCategoryUUIDForType(LLFolderType::FT_FAVORITE);
	LLViewerInventoryCategory* favorites_cat = gInventory.getCategory(favorites_id);
	if (!favorites_cat)
	{
		LL_WARNS() << "Cannot find the favorites folder" << LL_ENDL;
	}
	else
	{
		mFolderCombo->add(getString("favorites_bar"), favorites_cat->getUUID());
	}

	// Add the "Landmarks" category. 
	const LLViewerInventoryCategory* lmcat = gInventory.getCategory(mLandmarksID);
	if (!lmcat)
	{
		LL_WARNS() << "Cannot find the landmarks folder" << LL_ENDL;
	}
	else
	{
		std::string cat_full_name = LLPanelLandmarkInfo::getFullFolderName(lmcat);
		mFolderCombo->add(cat_full_name, lmcat->getUUID());
	}

	typedef std::vector<folder_pair_t> folder_vec_t;
	folder_vec_t folders;
	// Sort the folders by their full name.
	for (S32 i = 0; i < cats.size(); i++)
	{
		const LLViewerInventoryCategory* cat = cats.at(i);
		std::string cat_full_name = LLPanelLandmarkInfo::getFullFolderName(cat);
		folders.push_back(folder_pair_t(cat->getUUID(), cat_full_name));
	}
	sort(folders.begin(), folders.end(), cmp_folders);

	// Finally, populate the combobox.
	for (folder_vec_t::const_iterator it = folders.begin(); it != folders.end(); it++)
		mFolderCombo->add(it->second, LLSD(it->first));

	if (folder_id.notNull())
	{
		mFolderCombo->setCurrentByID(folder_id);
	}
}

void LLFloaterCreateLandmark::onCommitTextChanges()
{
    if (mItem.isNull())
    {
        return;
    }
    std::string current_title_value = mLandmarkTitleEditor->getText();
    std::string item_title_value = mItem->getName();
    std::string current_notes_value = mNotesEditor->getText();
    std::string item_notes_value = mItem->getDescription();

    LLStringUtil::trim(current_title_value);
    LLStringUtil::trim(current_notes_value);

    if (!current_title_value.empty() &&
        (item_title_value != current_title_value || item_notes_value != current_notes_value))
    {
        LLPointer<LLViewerInventoryItem> new_item = new LLViewerInventoryItem(mItem);
        new_item->rename(current_title_value);
        new_item->setDescription(current_notes_value);
        LLPointer<LLInventoryCallback> cb;
        LLInventoryModel::LLCategoryUpdate up(mItem->getParentUUID(), 0);
        gInventory.accountForUpdate(up);
        update_inventory_item(new_item, cb);
    }
}

void LLFloaterCreateLandmark::onCreateFolderClicked()
{
	LLNotificationsUtil::add("CreateLandmarkFolder", LLSD(), LLSD(),
		[this](const LLSD&notif, const LLSD&resp)
	{
		S32 opt = LLNotificationsUtil::getSelectedOption(notif, resp);
		if (opt == 0)
		{
			std::string folder_name = resp["message"].asString();
			if (!folder_name.empty())
			{
				inventory_func_type func = boost::bind(&LLFloaterCreateLandmark::folderCreatedCallback, this, _1);
				gInventory.createNewCategory(mLandmarksID, LLFolderType::FT_NONE, folder_name, func);
				gInventory.notifyObservers();
			}
		}
	}); 
}

void LLFloaterCreateLandmark::folderCreatedCallback(LLUUID folder_id)
{
	populateFoldersList(folder_id);
}

void LLFloaterCreateLandmark::onSaveClicked()
{
	if (mItem.isNull())
	{
		closeFloater();
		return;
	}
		

	std::string current_title_value = mLandmarkTitleEditor->getText();
	std::string item_title_value = mItem->getName();
	std::string current_notes_value = mNotesEditor->getText();
	std::string item_notes_value = mItem->getDescription();

	LLStringUtil::trim(current_title_value);
	LLStringUtil::trim(current_notes_value);

	LLUUID folder_id = mFolderCombo->getValue().asUUID();
	bool change_parent = folder_id != mItem->getParentUUID();

	LLPointer<LLViewerInventoryItem> new_item = new LLViewerInventoryItem(mItem);

	if (!current_title_value.empty() &&
		(item_title_value != current_title_value || item_notes_value != current_notes_value))
	{
		new_item->rename(current_title_value);
		new_item->setDescription(current_notes_value);
		LLPointer<LLInventoryCallback> cb;
		if (change_parent)
		{
			cb = new LLUpdateLandmarkParent(new_item, folder_id);
		}
		LLInventoryModel::LLCategoryUpdate up(mItem->getParentUUID(), 0);
		gInventory.accountForUpdate(up);
		update_inventory_item(new_item, cb);
	}
	else if (change_parent)
	{
		LLInventoryModel::update_list_t update;
		LLInventoryModel::LLCategoryUpdate old_folder(mItem->getParentUUID(),-1);
		update.push_back(old_folder);
		LLInventoryModel::LLCategoryUpdate new_folder(folder_id, 1);
		update.push_back(new_folder);
		gInventory.accountForUpdate(update);

		new_item->setParent(folder_id);
		new_item->updateParentOnServer(FALSE);
	}

    removeObserver();

	gInventory.updateItem(new_item);
	gInventory.notifyObservers();

	closeFloater();
}

void LLFloaterCreateLandmark::onCancelClicked()
{
    removeObserver();
	if (!mItem.isNull())
	{
		LLUUID item_id = mItem->getUUID();
		remove_inventory_item(item_id, NULL);
	}
	closeFloater();
}


void LLFloaterCreateLandmark::setItem(const uuid_set_t& items)
{
	for (uuid_set_t::const_iterator item_iter = items.begin();
		item_iter != items.end();
		++item_iter)
	{
		const LLUUID& item_id = (*item_iter);
		if(!highlight_offered_object(item_id))
		{
			continue;
		}

		LLInventoryItem* item = gInventory.getItem(item_id);

		llassert(item);
		if (item && (LLAssetType::AT_LANDMARK == item->getType()) )
		{
			if(!getItem())
			{
				mItem = item;
                mAssetID = mItem->getAssetUUID();
                mParentID = mItem->getParentUUID();
                setVisibleAndFrontmost(true);
				break;
			}
		}
	}
}

void LLFloaterCreateLandmark::updateItem(const uuid_set_t& items, U32 mask)
{
    if (!getItem())
    {
        return;
    }

    LLUUID landmark_id = getItem()->getUUID();

    for (uuid_set_t::const_iterator item_iter = items.begin();
        item_iter != items.end();
        ++item_iter)
    {
        const LLUUID& item_id = (*item_iter);
        if (landmark_id == item_id)
        {
            if (getItem() != gInventory.getItem(item_id))
            {
                // item is obsolete or removed
                closeFloater();
            }

            if (mParentID != mItem->getParentUUID())
            {
                // user moved landmark in inventory,
                // assume that we are done all other changes should already be commited
                closeFloater();
            }

            if ((mask & LLInventoryObserver::INTERNAL) && mAssetID != mItem->getAssetUUID())
            {
                closeFloater();
            }

            if (mask & LLInventoryObserver::LABEL)
            {
                mLandmarkTitleEditor->setText(mItem->getName());
            }

            if (mask & LLInventoryObserver::INTERNAL)
            {
                mNotesEditor->setText(mItem->getDescription());
            }
        }
    }
}