// Ryzom - MMORPG Framework <http://dev.ryzom.com/projects/ryzom/>
// Copyright (C) 2010  Winch Gate Property Limited
//
// 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 RZ_CTRL_EDITBOX_H
#define RZ_CTRL_EDITBOX_H

#include "interface_group.h"
#include "nel/3d/u_texture.h"


class CEventDescriptor;
class CViewText;
// ----------------------------------------------------------------------------
class CGroupEditBox : public CInterfaceGroup
{
public:
	enum TEntryType { Text, Integer, PositiveInteger, Float, PositiveFloat, Alpha, AlphaNum, AlphaNumSpace, Password, Filename, PlayerName }; // the type of entry this edit bot can deal with
public:
	/// Constructor
	CGroupEditBox(const TCtorParam &param);
	/// Dtor
	~CGroupEditBox();

	bool parse(xmlNodePtr cur,CInterfaceGroup * parentGroup);
	virtual uint32 getMemory() { return (uint32)(sizeof(*this)+_Id.size()); }

	virtual void draw();

	virtual bool handleEvent (const CEventDescriptor& eventDesc);

	/// Accessors
	ucstring getInputString() const { return _InputString; }
	const ucstring &getInputStringRef() const { return _InputString; }
	const ucstring &getPrompt() const { return _Prompt; }

	/** Set the prompt
	  * NB : line returns are encoded as '\n', not '\r\n'
	  */
	void		setPrompt(const ucstring &s) { _Prompt = s; }
	void		setInputString(const ucstring &str);
	void		setInputStringRef(const ucstring &str) {_InputString = str; };
	void		setInputStringAsInt(sint32 val);
	sint32		getInputStringAsInt() const;
	void		setInputStringAsInt64(sint64 val);
	sint64		getInputStringAsInt64() const;
	void		setInputStringAsFloat(float val);
	float		getInputStringAsFloat() const;
	void		setInputStringAsStdString(const std::string &str);
	std::string	getInputStringAsStdString() const;
	void		setInputStringAsUtf8(const std::string &str);
	std::string	getInputStringAsUtf8() const;
	void		setColor(NLMISC::CRGBA col);


	/// force the selection of all the text
	void		setSelectionAll();
	// disable any current selection
	static void	disableSelection() { _CurrSelection = NULL; }

	virtual void checkCoords();
	virtual void updateCoords();
	virtual void clearViews ();

	virtual void setActive (bool state);

	static CGroupEditBox *getMenuFather() { return _MenuFather; }

	void setCommand(const ucstring &command, bool execute);

	// Stop parent from blinking
	void		stopParentBlink() { if (_Parent) _Parent->disableBlink(); }

	// Get / set cursor position
	sint32		getCursorPos () const {return _CursorPos;}
	void		setCursorPos (sint32 pos) {_CursorPos=pos;}

	// Get / set cursor at previous line end
	bool		isCursorAtPreviousLineEnd () const {return _CursorAtPreviousLineEnd;}
	void		setCursorAtPreviousLineEnd (bool setCursor) {_CursorAtPreviousLineEnd=setCursor;}

	// Get / set current selection position
	static sint32	getSelectCursorPos () {return _SelectCursorPos;}
	static void		setSelectCursorPos (sint32 pos) {_SelectCursorPos=pos;}

	// Get / set current selection
	static CGroupEditBox	*getCurrSelection () {return _CurrSelection;}
	static void		setCurrSelection (CGroupEditBox *selection) {_CurrSelection=selection;}

	// Get the view text
	const CViewText	*getViewText () const {return _ViewText;}

	// Get the historic information
	sint32	getMaxHistoric() const {return _MaxHistoric;}
	sint32	getCurrentHistoricIndex () const {return _CurrentHistoricIndex;}
	void	setCurrentHistoricIndex (sint32 index) {_CurrentHistoricIndex=index;}
	const ucstring	&getHistoric(uint32 index) const {return _Historic[index];}
	uint32	getNumHistoric() const {return (uint32)_Historic.size ();}

	// Get on change action handler
	const std::string	&getAHOnChange() const {return _AHOnChange;}
	const std::string	&getParamsOnChange() const {return _ParamsOnChange;}

	void	cutSelection();

	/// From CInterfaceElement
	sint32	getMaxUsedW() const;
	sint32	getMinUsedW() const;

	// Copy the selection into buffer
	void		copy();
	// Paste the selection into buffer
	void		paste();

	// Expand the expression (true if there was a '/' at the start of the line)
	bool		expand();

	// Back space
	void		back();

	// ignore the next char/key event -> useful when a key set the focus on an editbox (keydown is received, the focus, then keychar is received by the editbox again, but is irrelevant)
	void		bypassNextKey() { _BypassNextKey = true; }

	// True if the editBox loose the focus on enter
	bool		getLooseFocusOnEnter() const {return _LooseFocusOnEnter;}
	// True if the editBox can recover the focus on enter. if not, it does not erase OldCapturedKeyboard when loose focus
	bool		getRecoverFocusOnEnter() const {return _RecoverFocusOnEnter;}
	void		setRecoverFocusOnEnter(bool state) {_RecoverFocusOnEnter= state;}
	//
	virtual void    clearAllEditBox();
	// From CInterfaceElement
	virtual bool wantSerialConfig() const;
	// From CInterfaceElement
	virtual void serialConfig(NLMISC::IStream &f);
	// From CInterfaceElement
	virtual void onQuit();
	// From CInterfaceElement
	virtual void onLoadConfig();

	// from CCtrlBase
	virtual	void elementCaptured(CCtrlBase *capturedElement);

	// from CCtrlBase
	virtual void onKeyboardCaptureLost();

	std::string getAHOnFocus() { return _AHOnFocus; }
	std::string getAHOnFocusParams() { return _AHOnFocusParams; }


	// set the input string as "default". will be reseted at first click (used for user information)
	void	setDefaultInputString(const ucstring &str);

	// For Interger and PositiveInteger, can specify min and max values
	void	setIntegerMinValue(sint32 minValue) {_IntegerMinValue=minValue;}
	void	setIntegerMaxValue(sint32 maxValue) {_IntegerMaxValue=maxValue;}
	void	setPositiveIntegerMinValue(uint32 minValue) {_PositiveIntegerMinValue=minValue;}
	void	setPositiveIntegerMaxValue(uint32 maxValue) {_PositiveIntegerMaxValue=maxValue;}

	void setFocusOnText();

	int luaSetSelectionAll(CLuaState &ls);
	int luaSetupDisplayText(CLuaState &ls);
	int luaSetFocusOnText(CLuaState &ls);
	int luaCancelFocusOnText(CLuaState &ls);
	REFLECT_EXPORT_START(CGroupEditBox, CInterfaceGroup)
		REFLECT_LUA_METHOD("setupDisplayText", luaSetupDisplayText);
		REFLECT_LUA_METHOD("setSelectionAll", luaSetSelectionAll);
		REFLECT_LUA_METHOD("setFocusOnText", luaSetFocusOnText);
		REFLECT_LUA_METHOD("cancelFocusOnText", luaCancelFocusOnText);
		REFLECT_STRING("input_string", getInputStringAsStdString, setInputStringAsStdString);
		REFLECT_UCSTRING("uc_input_string", getInputString, setInputString);
		REFLECT_BOOL("enter_recover_focus", getRecoverFocusOnEnter, setRecoverFocusOnEnter);
	REFLECT_EXPORT_END

	/** Restore the original value of the edit box.
	  * This value is captured when the edit box get focus
	  * (return true if no undo was available)
      * Will always fails ifthe edito box do not have the focus
	  */
	bool undo();

	/** Cancel last undo operation
	  * Return true if redo operation is available
	  */
	bool redo();

	/// freeze the control (loose focus, and cannot edit)
	void	setFrozen (bool state);
	bool	getFrozen () const { return _Frozen; }

protected:

	// Cursor infos
	float	_BlinkSpeed;
	float	_BlinkTime;
	sint32	_CursorPos;
	uint32  _MaxNumChar;
	uint32  _MaxNumReturn;
	uint32  _MaxFloatPrec;		// used in setInputStringAsFloat() only
	sint32	_MaxCharsSize;
	sint32	_FirstVisibleChar;
	sint32	_LastVisibleChar;

	// Text selection
	static sint32	      _SelectCursorPos;
	static CGroupEditBox *_CurrSelection; // the edit box for which the selection is currently active, or NULL if there's none
	NLMISC::CRGBA	_TextSelectColor;
	NLMISC::CRGBA	_BackSelectColor;

	// Text info
	ucstring	_Prompt;
	ucstring	_InputString;
	CViewText	*_ViewText;

	// undo / redo
	ucstring	_StartInputString;  // value of the input string when focus was acuired first
	ucstring	_ModifiedInputString;


	// Historic info
	typedef std::deque<ucstring>		THistoric;
	THistoric	_Historic;
	uint32		_MaxHistoric;
	sint32		_CurrentHistoricIndex;
	sint32      _PrevNumLine;

	// Action Handler
	std::string _AHOnChange;
	std::string _ParamsOnChange;
	std::string _ListMenuRight;

	std::string _AHOnFocusLost;
	std::string _AHOnFocusLostParams;
	std::string _AHOnFocus;
	std::string _AHOnFocusParams;



	// entry type
	TEntryType _EntryType;


	bool	_Setupped                  : 1; // setup
	bool	_BypassNextKey             : 1;
	bool	_BlinkState                : 1;
	bool	_CursorAtPreviousLineEnd   : 1; // force the cursor to be displayed at the end of the previous line end (if END has beeen pressed while in a string split accross 2 lines)
	bool	_LooseFocusOnEnter         : 1;
	bool	_RecoverFocusOnEnter       : 1;
	bool    _ResetFocusOnHide          : 1;
	bool	_BackupFatherContainerPos  : 1; // Backup father container position when characters are typed.
	                                        // If the edit box is at the bottom of the screen and if it expands on y
	                                        // because of multiline, thz parent container will be moved to top
	                                        // The good position can be restored by a press on enter then
	bool	_WantReturn				   : 1; // Want return char, don't call the enter action handler
	bool	_Savable				   : 1; // should content be saved ?
	bool	_DefaultInputString		   : 1; // Is the current input string the default one (should not be edited)
	bool	_Frozen					   : 1;	// is the control frozen? (cannot edit in it)

	bool	_CanRedo                   : 1;
	bool	_CanUndo                   : 1;

	std::vector<char>					_NegativeFilter;

	sint	_CursorTexID;
	sint32	_CursorWidth;

	sint32	_IntegerMinValue;
	sint32	_IntegerMaxValue;
	uint32	_PositiveIntegerMinValue;
	uint32	_PositiveIntegerMaxValue;

	sint32	_ViewTextDeltaX;

private:
	void setupDisplayText();
	void makeTopWindow();
	void handleEventChar(const CEventDescriptorKey &event);
	void handleEventString(const CEventDescriptorKey &event);
	void setup();
	void triggerOnChangeAH();
	void appendString(const ucstring &str);

	ucstring	getSelection();

	static CGroupEditBox *_MenuFather;

	static bool isValidAlphaNumSpace(ucchar c)
	{
		if (c > 255) return false;
		char ac = (char) c;
		return (ac >= '0' && ac <= '9') ||
			(ac >= 'a' && ac <= 'z') ||
			(ac >= 'A' && ac <= 'Z') ||
			ac==' ';
	}

	static bool isValidAlphaNum(ucchar c)
	{
		if (c > 255) return false;
		char ac = (char) c;
		return (ac >= '0' && ac <= '9') ||
			   (ac >= 'a' && ac <= 'z') ||
			   (ac >= 'A' && ac <= 'Z');
	}

	static bool isValidAlpha(ucchar c)
	{
		if (c > 255) return false;
		char ac = (char) c;
		return (ac >= 'a' && ac <= 'z') ||
			   (ac >= 'A' && ac <= 'Z');
	}

	static bool isValidPlayerNameChar(ucchar c)
	{
		// valid player name (with possible shard prefix / suffix format
		return isValidAlpha(c) || c=='.' || c=='(' || c==')';
	}

	static bool isValidFilenameChar(ucchar c)
	{
		if (c == '\\' ||
			c == '/' ||
			c == ':' ||
			c == '*' ||
			c == '?' ||
			c == '\"' ||
			c == '<' ||
			c == '>' ||
			c == '|') return false;
		return true;
	}
	//
	bool isFiltered(ucchar c)
	{
		uint length = (uint)_NegativeFilter.size();
		for (uint k = 0; k < length; ++k)
		{
			if ((ucchar) _NegativeFilter[k] == c) return true;
		}
		return false;
	}
};


#endif // RZ_CTRL_EDITBOX_H

/* End of ctrl_editbox.h */