// Ryzom - MMORPG Framework <http://dev.ryzom.com/projects/ryzom/>
// Copyright (C) 2010-2017  Winch Gate Property Limited
//
// This source file has been modified by the following contributors:
// Copyright (C) 2020  Jan BOON (Kaetemi) <jan.boon@kaetemi.be>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.




#ifndef STRING_MANAGER_CLIENT_H
#define STRING_MANAGER_CLIENT_H

#include "nel/misc/static_map.h"
#include "nel/misc/ucstring.h"
#include "nel/misc/bit_mem_stream.h"
#include "nel/misc/i18n.h"
#include "nel/misc/sheet_id.h"
#include "nel/misc/diff_tool.h"
#include "game_share/brick_families.h"
#include "game_share/skills.h"


namespace STRING_MANAGER
{

class IStringWaiterRemover;
class IStringWaitCallback;

class CStringManagerClient
{
	friend class IStringWaiterRemover;
	friend class IStringWaitCallback;
public:
	// Singleton pattern implementation
	static CStringManagerClient	*instance();
	static bool hasInstance() { return _Instance; }
	static void	release(bool mustReleaseStaticArrays);

	/** Prepare the string manager to use a persistent string cache.
	 *	There is one cache file for each language and for each encountered shard.
	 */
	void initCache(const std::string &languageCode);
	/** Clear the current string table and load the content of the cache file.
	 *	This method is called after receiving the impulse RELOAD_CACHE from
	 *	IOS.
	 *	If the received timestamp and the file timestamp differ, the file cache
	 *	is reseted.
	 */
	void loadCache(uint32 timestamp, uint32 shardId);
	bool isCacheLoaded()	{return _CacheLoaded;};
	// Force the cache to be saved
	void flushStringCache();

	bool getString(uint32 stringId, std::string &result);
	void waitString(uint32 stringId, const IStringWaiterRemover *premover, std::string *result);
	void waitString(uint32 stringId, IStringWaitCallback *pcallback);
	bool getDynString(uint32 dynStringId, std::string &result);
	void waitDynString(uint32 stringId, const IStringWaiterRemover *premover, std::string *result);
	void waitDynString(uint32 stringId, IStringWaitCallback *pcallback);

	void receiveString(uint32 stringId, const std::string &str);
	void receiveDynString(NLMISC::CBitMemStream &bms);

	void releaseDynString(uint32 stringId);

	// Yoyo: Append to the I18N some words (skills, bricks...)
	static void				initI18NSpecialWords(const std::string &languageCode);
	static void				specialWordsMemoryCompress();
	// Yoyo: Replace the Brick Name with Filled stats (CSBrickManager work). No-Op if not found
	static void				replaceSBrickName(NLMISC::CSheetId id, const std::string &name, const std::string &desc, const std::string &desc2);
	static void				replaceDynString(const std::string &name, const std::string &text);

	// Get the Localized Name of the Places.
	static const char *getPlaceLocalizedName(const std::string &placeNameID);
	// Get the Localized Name of the faction (for the fame)
	static const char *getFactionLocalizedName(const std::string &factionNameID);
	// Get the Localized Name of the Skill.
	static const char *getSkillLocalizedName(SKILLS::ESkills e);
	// Get the Localized Name of the Item.
	static const char *getItemLocalizedName(NLMISC::CSheetId id);
	// Get the Localized Name of the Creature.
	static const char *getCreatureLocalizedName(NLMISC::CSheetId id);
	// Get the Localized Name of the SBrick.
	static const char *getSBrickLocalizedName(NLMISC::CSheetId id);
	// Get the Localized Name of the SPhrase.
	static const char *getSPhraseLocalizedName(NLMISC::CSheetId id);

	// Get the Localized Description of the Skill.
	static const char *getSkillLocalizedDescription(SKILLS::ESkills e);
	// Get the Localized Descriptionof the Item.
	static const char *getItemLocalizedDescription(NLMISC::CSheetId id);
	// Get the Localized Description of the SBrick.
	static const char *getSBrickLocalizedDescription(NLMISC::CSheetId id);
	// Get the Localized Composition Description of the SBrick.
	static const char *getSBrickLocalizedCompositionDescription(NLMISC::CSheetId id);
	// Get the Localized Description of the SPhrase.
	static const char *getSPhraseLocalizedDescription(NLMISC::CSheetId id);

	// Get the Localized Title name
	static const char *getTitleLocalizedName(const std::string &titleId, bool women);
	static std::vector<std::string> getTitleInfos(const std::string &titleId, bool women);

	// Get the Localized name of a classification type
	static const char *getClassificationTypeLocalizedName(EGSPD::CClassificationType::TClassificationType type);

	// Outpost name
	static const char *getOutpostLocalizedName(NLMISC::CSheetId id);
	// Outpost description
	static const char *getOutpostLocalizedDescription(NLMISC::CSheetId id);
	// Outpost building name
	static const char *getOutpostBuildingLocalizedName(NLMISC::CSheetId id);
	// Outpost building description
	static const char *getOutpostBuildingLocalizedDescription(NLMISC::CSheetId id);
	// Squad name
	static const char *getSquadLocalizedName(NLMISC::CSheetId id);
	// Squad description
	static const char *getSquadLocalizedDescription(NLMISC::CSheetId id);

private:
	// constructor.
	CStringManagerClient();
	// destructor.
	~CStringManagerClient();

	/// A string waiter is destoyed, remove any waiting string reference from it.
	void removeStringWaiter(const IStringWaiterRemover *remover);
	/// A string wait callback  is destoyed, remove any waiting string reference from it.
	void removeStringWaiter(const IStringWaitCallback *callback);

	enum TParamType
	{
		string_id,
		integer,
		time,
		money,
		dyn_string_id,
		sheet_id
	};

	struct TParamValue
	{
		TParamType Type;
		std::string::size_type ReplacementPoint;
		union
		{
			uint32	StringId;
			sint32	Integer;
			uint32	Time;
			uint64	Money;
			uint32	DynStringId;
		};
	};

	struct TDynStringInfo
	{
		enum TStatus
		{
			received,
			serialized,
			complete
		};
		TStatus						Status;
		NLMISC::CBitMemStream		Message;
		uint32						StringId;
		std::vector<TParamValue>	Params;
		std::string					String;
	};

	enum
	{
		EmptyStringId= 0,
		EmptyDynStringId= 0xffffffff
	};

	struct TStringWaiter
	{
		/// Pointer to the utf-8 string to fill
		std::string					*Result;
		/// Pointer to the remover that contains this string reference
		const IStringWaiterRemover	*Remover;
	};

	bool	buildDynString(TDynStringInfo &dynInfo);


	/// Container for simple strings
	typedef CHashMap<uint, std::string>			TStringsContainer;
	/// Container for dyn strings
	typedef CHashMap<uint, TDynStringInfo>		TDynStringsContainer;
	/// Container of string reference waiting for value.
	typedef CHashMultiMap<uint, TStringWaiter>	TStringWaitersContainer;
	/// Container of string reference to string callback object.
	typedef CHashMultiMap<uint, IStringWaitCallback*>	TStringCallbacksContainer;


	TStringsContainer		_ReceivedStrings;
	CHashSet<uint>	    	_WaitingStrings;

	TDynStringsContainer	_ReceivedDynStrings;
	TDynStringsContainer	_WaitingDynStrings;

	/// String waiting the string value from the server.
	TStringWaitersContainer		_StringsWaiters;
	// String waiting the dyn string value from the server.
	TStringWaitersContainer		_DynStringsWaiters;

	// Callback for string value from the server
	TStringCallbacksContainer	_StringsCallbacks;
	// Callback for dyn string value from the server
	TStringCallbacksContainer	_DynStringsCallbacks;

	// Return value for waiting string..
	static std::string			_WaitString;

	// Singleton pattern implementation
	static CStringManagerClient	*_Instance;

	//@{
	//\name Cache management
	/// Flag for cache management initialisation done.
	bool			_CacheInited;
	/// Language code is used to identify the cache file to use.
	std::string		m_LanguageCode;
	/// Timestamp (unix date) of the corrently loaded cache file.
	uint32			_Timestamp;
	/// Fullpath name of the current cache file.
	std::string		_CacheFilename;
	/// Flag to incate that the cache is loaded.
	bool			_CacheLoaded;
	/// Waiting string to be saved in cache
	struct CCacheString
	{
		uint32		StringId;
		std::string	String;
	};
	std::vector<CCacheString>	_CacheStringToSave;
	//@}

	// SpecialItems.
	class	CItem
	{
	public:
		// The Name of the item
		std::string		Name;
		// The Women Name of the item
		std::string		WomenName;
		// Description of the item
		std::string		Desc;
		// Optional Second description (For SBrick composition for example)
		std::string		Desc2;

		void	serial(NLMISC::IStream &f)
		{
			sint ver = f.serialVersion(2);
			if (ver >= 2)
			{
				f.serial(Name);
				f.serial(WomenName);
				f.serial(Desc);
				f.serial(Desc2);
			}
			else
			{
				nlassert(f.isReading());
				ucstring name; // Old UTF-16 serial
				ucstring womenName; // Old UTF-16 serial
				ucstring desc; // Old UTF-16 serial
				ucstring desc2; // Old UTF-16 serial
				f.serial(name);
				if (ver >= 1)
					f.serial(womenName);
				f.serial(desc);
				f.serial(desc2);
				Name = name.toUtf8();
				WomenName = womenName.toUtf8();
				Desc = desc.toUtf8();
				Desc2 = desc2.toUtf8();
			}
		}
	};

	static bool _SpecItem_MemoryCompressed;

	static	std::map<std::string, CItem> _SpecItem_TempMap;
	static std::vector<std::string> _TitleWords;
	static std::map<std::string, std::string> _DynStrings;


	static char *_SpecItem_Labels;
	static char *_SpecItem_NameDesc;
	struct CItemLight
	{
		const char *Label;
		const char *Name;
		const char *WomenName;
		const char *Desc;
		const char *Desc2;
	};
	struct CItemLightComp
	{
		bool operator()(const CItemLight &x, const CItemLight &y) const
		{
			return strcmp(x.Label, y.Label) < 0;
		}
	};

	static std::vector<CItemLight> _SpecItems;

	static	const char *getSpecialWord(const std::string &label, bool women = false);
	static	const char *getSpecialDesc(const std::string &label);
	static	const char *getSpecialDesc2(const std::string &label);

	// Check Files for the Packed string.
	class CFileCheck
	{
	public:
		uint32		ReferenceDate;
		uint32		AdditionDate;

		CFileCheck()
		{
			ReferenceDate= 0;
			AdditionDate= 0;
		}

		bool operator==(const CFileCheck &o) const
		{
			return ReferenceDate==o.ReferenceDate && AdditionDate==o.AdditionDate;
		}

		void	serial(NLMISC::IStream &f)
		{
			f.serialVersion(0);
			f.serial(ReferenceDate);
			f.serial(AdditionDate);
		}
	};

	// The Header for the Packed String Client
	class CPackHeader
	{
	public:
		// The language code used
		std::string		LanguageCode;
		// The Modification Dates of each word files
		std::vector<CFileCheck>		FileChecks;
		// If must rebuild the packed version for any reason.
		uint32			PackedVersion;

		void	serial(NLMISC::IStream &f)
		{
			f.serialCheck(NELID("_RTS"));
			f.serialCheck(NELID("KCAP"));
			f.serialVersion(0);
			f.serial(PackedVersion);
			f.serial(LanguageCode);
			f.serialCont(FileChecks);
		}
	};

	// return true if OK (same).
	static bool checkWordFileDates(std::vector<CFileCheck> &fileChecks, const std::vector<std::string> &fileNames, const std::string &languageCode);

};


/** Class that want to register to wait for string
 *	need to derive from this class.
 */
class IStringWaiterRemover
{
public:
	virtual ~IStringWaiterRemover()
	{
		// signal the string manager that this waiter is destroyed
		if (CStringManagerClient::hasInstance())
			CStringManagerClient::instance()->removeStringWaiter(this);
	}
};

/** Implement this class if you want to wait for
 *	string to be delivered.
 */
class IStringWaitCallback
{
public:
	/// Overide this method to receive callback for string.
	virtual void onStringAvailable(uint /* stringId */, const std::string &/* value */) {}
	/// Overide this method to receive callback for dynamic string.
	virtual void onDynStringAvailable(uint /* stringId */, const std::string &/* value */) {}

	virtual ~IStringWaitCallback()
	{
		// signal the string manager that this waiter is destroyed
		if (CStringManagerClient::hasInstance())
			CStringManagerClient::instance()->removeStringWaiter(this);
	}

};


/** A proxy file loader for CI18N
 *	The implementation will check if there is any
 *	new content in the translation/work directory of ryzom
 *	then overwrite the value found in data/gamedev/language
 */
class CLoadProxy : public NLMISC::CI18N::ILoadProxy, public TStringDiff::IDiffCallback
{
	void loadStringFile(const std::string &filename, ucstring &text); // TODO: UTF-8 (serial)

	void onEquivalent(uint addIndex, uint refIndex, TStringDiffContext &context);
	void onAdd(uint addIndex, uint refIndex, TStringDiffContext &context);
	void onRemove(uint addIndex, uint refIndex, TStringDiffContext &context);
	void onChanged(uint addIndex, uint refIndex, TStringDiffContext &context);
	void onSwap(uint newIndex, uint refIndex, TStringDiffContext &context);

};

} // namespace STRING_MANAGER

#endif //STRING_MANAGER_CLIENT_H