#ifndef T_FILEPATH_INCLUDED
#define T_FILEPATH_INCLUDED

#include "tcommon.h"
#include "texception.h"

#undef DVAPI
#undef DVVAR
#ifdef TSYSTEM_EXPORTS
#define DVAPI DV_EXPORT_API
#define DVVAR DV_EXPORT_VAR
#else
#define DVAPI DV_IMPORT_API
#define DVVAR DV_IMPORT_VAR
#endif

class QString;

//-----------------------------------------------------------------------------
/* 
  This is an example of how to use TFilePath and TFrameId classes.
*/

//!\include frameid_ex.cpp
//! The class TFrameId describes a frame identified by an integer number of four figures and, in case, by a character (necessary for added frames)
class DVAPI TFrameId
{
	int m_frame;
	char m_letter; // serve per i frame "aggiunti" del tipo pippo.0001a.tzp => f=1 c='a'

public:
	enum { EMPTY_FRAME = -1, // es. pippo..tif
		   NO_FRAME = -2	 // es. pippo.tif
	};

	enum FrameFormat {
		FOUR_ZEROS,
		NO_PAD,
		UNDERSCORE_FOUR_ZEROS, //pippo_0001.tif
		UNDERSCORE_NO_PAD
	}; //pippo_1.tif

	TFrameId(int f = EMPTY_FRAME) : m_frame(f), m_letter(0){};
	TFrameId(int f, char c) : m_frame(f), m_letter(c){};

	inline bool operator==(const TFrameId &f) const { return f.m_frame == m_frame && f.m_letter == m_letter; };
	inline bool operator!=(const TFrameId &f) const { return (m_frame != f.m_frame || m_letter != f.m_letter); };
	inline bool operator<(const TFrameId &f) const { return (m_frame < f.m_frame || (m_frame == f.m_frame && m_letter < f.m_letter)); };
	inline bool operator>(const TFrameId &f) const { return f < *this; }
	inline bool operator>=(const TFrameId &f) const { return !operator<(f); }
	inline bool operator<=(const TFrameId &f) const { return !operator>(f); }

	const TFrameId &operator++();
	const TFrameId &operator--();

	TFrameId &operator=(const TFrameId &f)
	{
		m_frame = f.m_frame;
		m_letter = f.m_letter;
		return *this;
	};

	bool isEmptyFrame() const { return m_frame == EMPTY_FRAME; };
	bool isNoFrame() const { return m_frame == NO_FRAME; };

	//operator string() const;
	std::string expand(FrameFormat format = FOUR_ZEROS) const;
	int getNumber() const { return m_frame; };
	char getLetter() const { return m_letter; };
};

//-----------------------------------------------------------------------------
/*! \relates TFrameId*/

inline std::ostream &operator<<(std::ostream &out, const TFrameId &f)
{
	if (f.isNoFrame())
		out << "<noframe>";
	else if (f.isEmptyFrame())
		out << "''";
	else
		out << f.expand().c_str();
	return out;
}

//-----------------------------------------------------------------------------

/*!The class TFilePath defines a file path.Its constructor creates a string according 
   to the platform and to certain rules.For more information see the constructor.*/
class DVAPI TFilePath
{
	static bool m_underscoreFormatAllowed;
	std::wstring m_path;
	void setPath(std::wstring path);

public:
	/*! this static method allows correct reading of levels in the form pippo_0001.tif (represented  always as pippo..tif) */
	static void setUnderscoreFormatAllowed(bool state) { m_underscoreFormatAllowed = state; }

	/*!This constructor creates a string removing redundances ('//', './',etc.) and final slashes,
	    correcting (redressing) the "twisted" slashes.
 	    Note that if the current directory is ".", it becomes "".
      If the path is "<alpha>:" a slash will be added*/

	explicit TFilePath(const char *path = "");
	explicit TFilePath(const std::string &path);
	explicit TFilePath(const std::wstring &path);
	explicit TFilePath(const QString &path);

	~TFilePath(){};
	TFilePath(const TFilePath &fp) : m_path(fp.m_path) {}
	TFilePath &operator=(const TFilePath &fp)
	{
		m_path = fp.m_path;
		return *this;
	}

	bool operator==(const TFilePath &fp) const;
	inline bool operator!=(const TFilePath &fp) const { return !(m_path == fp.m_path); }
	bool operator<(const TFilePath &fp) const;

	const std::wstring getWideString() const;
	QString getQString() const;

	/*!Returns:
	 a.  "" if there is no filename extension
	 b. "." if there is a filename extension but no frame
	 c.".." if there are both filename extension and frame */
	std::string getDots() const; // ritorna ""(no estensione), "."(estensione, no frame) o ".."(estensione e frame)

	/*!Returns the filename extension, including leading period (.).
	    Returns "" if there is no filename extension.*/
	std::string getDottedType() const; // ritorna l'estensione con il PUNTO (se non c'e' estensione ritorna "")

	/*!Returns the filename extension, escluding leading period (.).
	    Returns "" if there is no filename extension.*/
	std::string getUndottedType() const; // ritorna l'estensione senza PUNTO

	/*!It is equal to getUndottedType():
	    Returns the filename extension, excluding leading period (.).
	    Returns "" if there is no filename extension.*/
	std::string getType() const { return getUndottedType(); }; // ritorna l'estensione SENZA PUNTO
	/*!Returns the base filename (no extension, no dots, no slash)*/
	std::string getName() const;		 // noDot! noSlash!
	std::wstring getWideName() const; // noDot! noSlash!

	/*!Returns the filename (with extension, escluding in case the frame number).
	    ex.: TFilePath("/pippo/pluto.0001.gif").getLevelName() == "pluto..gif"
	 */
	std::string getLevelName() const;		// es. TFilePath("/pippo/pluto.0001.gif").getLevelName() == "pluto..gif"
	std::wstring getLevelNameW() const; // es. TFilePath("/pippo/pluto.0001.gif").getLevelName() == "pluto..gif"

	/*!Returns the parent directory escluding the eventual final slash.*/
	TFilePath getParentDir() const; // noSlash!;

	TFrameId getFrame() const;

	bool isLevelName() const; //{return getFrame() == TFrameId(TFrameId::EMPTY_FRAME);};
	bool isAbsolute() const;
	bool isRoot() const;
	bool isEmpty() const { return m_path == L""; };

	/*!Return a TFilePath with extension type.
   type is a string that indicate the filename extension(ex:. bmp or .bmp)*/
	TFilePath withType(const std::string &type) const;
	/*!Return a TFilePath with filename "name".*/
	TFilePath withName(const std::string &name) const;
	/*!Return a TFilePath with filename "name". Unicode*/
	TFilePath withName(const std::wstring &name) const;
	/*!Return a TFilePath with parent directory "dir".*/
	TFilePath withParentDir(const TFilePath &dir) const;
	/*!Return a TFilePath without parent directory */
	TFilePath withoutParentDir() const { return withParentDir(TFilePath()); }
	/*!Return a TFilePath with frame "frame".*/
	TFilePath withFrame(const TFrameId &frame, TFrameId::FrameFormat format = TFrameId::FOUR_ZEROS) const;
	/*!Return a TFilePath with a frame identified by an integer number "f".*/
	TFilePath withFrame(int f) const { return withFrame(TFrameId(f)); };
	/*!Return a TFilePath with a frame identified by an integer and by a character*/
	TFilePath withFrame(int f, char letter) const { return withFrame(TFrameId(f, letter)); };

	TFilePath withFrame() const { return withFrame(TFrameId(TFrameId::EMPTY_FRAME)); };
	TFilePath withNoFrame() const { return withFrame(TFrameId(TFrameId::NO_FRAME)); }; // pippo.tif

	TFilePath operator+(const TFilePath &fp) const;
	TFilePath &operator+=(const TFilePath &fp) /*{*this=*this+fp;return *this;}*/;

	inline TFilePath operator+(const std::string &s) const
	{
		return operator+(TFilePath(s));
	};
	inline TFilePath &operator+=(const std::string &s)
	{
		return operator+=(TFilePath(s));
	};

	TFilePath &operator+=(const std::wstring &s);
	TFilePath operator+(const std::wstring &s) const
	{
		TFilePath res(*this);
		return res += s;
	}

	bool isAncestorOf(const TFilePath &) const;

	TFilePath operator-(const TFilePath &fp) const; // TFilePath("/a/b/c.txt")-TFilePath("/a/") == TFilePath("b/c.txt");
													// se fp.isAncestorOf(this) == false ritorna this

	bool match(const TFilePath &fp) const; // sono uguali a meno del numero di digits del frame

	// '/a/b/c.txt' => head='a' tail='b/c.txt'
	void split(std::wstring &head, TFilePath &tail) const;
};

//-----------------------------------------------------------------------------

class TMalformedFrameException : public TException
{
public:
	TMalformedFrameException(const TFilePath &fp, const std::wstring &msg = std::wstring())
		: TException(fp.getWideName() + L":" + msg)
	{
	}

private:
	TMalformedFrameException();
};

//-----------------------------------------------------------------------------

DVAPI std::ostream &operator<<(std::ostream &out, const TFilePath &path);

typedef std::list<TFilePath> TFilePathSet;

#endif //T_FILEPATH_INCLUDED