#include "tfilepath.h"
#include <math.h>
#include <ctype.h>

#ifdef WIN32
const char slash = '\\';
const char auxslash = '/';
#else
const char slash = '/';
const char auxslash = '\\';
#endif

//=============================================================================

//TFrameId::operator string() const
string TFrameId::expand(FrameFormat format) const
{
	if (m_frame == EMPTY_FRAME)
		return "";
	else if (m_frame == NO_FRAME)
		return "-";
	char buffer[80];
	ostrstream o_buff(buffer, sizeof(buffer));
	if (format == FOUR_ZEROS) {
		o_buff.fill('0');
		o_buff.width(4);
		o_buff << m_frame;
		o_buff.width(0);
	} else {
		o_buff << m_frame;
	}
	if (m_letter != '\0')
		o_buff << m_letter;
	int len = o_buff.pcount();
	return string(buffer, len);
}

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

const TFrameId &TFrameId::operator++()
{
	++m_frame;
	m_letter = 0;
	return *this;
}

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

const TFrameId &TFrameId::operator--()
{
	if (m_letter > 0)
		m_letter = 0;
	else
		--m_frame;
	return *this;
}

//=============================================================================

inline bool isSlash(char c)
{
	return c == slash || c == auxslash;
}

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

// cerca l'ultimo '/' o '\'. Se non c'e' ritorna -1
// di modo che la sottostringa che parte da getLastSlash() + 1 e' nome.frame.tipo
inline int getLastSlash(const string &path)
{
	int i;
	for (i = path.length() - 1; i >= 0 && !isSlash(path[i]); i--) {
	}
	return i;
}

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

void TFilePath::setPath(string path)
{
	bool isUncName = false;
	// elimino i '//', './' e '/' finali; raddrizzo gli slash 'storti'.
	// se il path comincia con  "<alpha>:" aggiungo uno slash
	int length = path.length();
	int pos = 0;
	if (path.length() >= 2 && isalpha(path[0]) && path[1] == ':') {
		m_path.append(path, 0, 2);
		pos = 2;
		if (path.length() == 2 || !isSlash(path[pos]))
			m_path.append(1, slash);
	}
#ifdef WIN32
	else //se si tratta di un path in formato UNC e' del tipo "\\\\MachineName"
		if (path.length() >= 3 && path[0] == '\\' && path[1] == '\\' && isalpha(path[2])) {
		isUncName = true;
		m_path.append(path, 0, 3);
		pos = 3;
	}
#endif
	for (; pos < length; pos++)
		if (path[pos] == '.') {
			pos++;
			if (pos >= length) {
				if (pos > 1)
					m_path.append(1, '.');
			} else if (!isSlash(path[pos]))
				m_path.append(path, pos - 1, 2);
			else {
				while (pos + 1 < length && isSlash(path[pos + 1]))
					pos++;
			}
		} else if (isSlash(path[pos])) {
			do
				pos++;
			while (pos < length && isSlash(path[pos]));
			pos--;
			m_path.append(1, slash);
		} else {
			m_path.append(1, path[pos]);
		}

	// rimuovo l'eventuale '/' finale (a meno che m_path == "/" o m_path == "<letter>:\"
	// oppure sia UNC (Windows only) )
	if (!(m_path.length() == 1 && m_path[0] == slash ||
		  m_path.length() == 3 && isalpha(m_path[0]) && m_path[1] == ':' && m_path[2] == slash) &&
		m_path.length() > 1 && m_path[m_path.length() - 1] == slash)
		m_path.erase(m_path.length() - 1, 1);

	if (isUncName && m_path.find_last_of('\\') == 1) // e' indicato solo il nome della macchina...
		m_path.append(1, slash);
}

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

TFilePath::TFilePath(string path)
	: m_path("")
{
	setPath(path);
}

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

TFilePath::TFilePath(const char *path)
	: m_path("")
{
	setPath(string(path));
}

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

bool TFilePath::operator==(const TFilePath &fp) const
{
#ifdef WIN32
	return stricmp(m_path.c_str(), fp.m_path.c_str()) == 0;
#else
	return m_path == fp.m_path;
#endif
}

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

bool TFilePath::operator<(const TFilePath &fp) const
{
	string iName = m_path;
	string jName = fp.m_path;
	int i1 = 0, j1 = 0;
	int i2 = m_path.find("\\");
	int j2 = fp.m_path.find("\\");
	if (i2 == j2 && j2 == -1)
#ifdef WIN32
		return stricmp(m_path.c_str(), fp.m_path.c_str()) < 0;
#else
		return m_path < fp.m_path;
#endif
	if (!i2) {
		++i1;
		i2 = m_path.find("\\", i1);
	}
	if (!j2) {
		++j1;
		j2 = fp.m_path.find("\\", j1);
	}
	while (i2 != -1 || j2 != -1) {
		iName = m_path.substr(i1, i2 - i1);
		jName = fp.m_path.substr(j1, j2 - j1);
//se le due parti di path, conpresi tra slash sono uguali
//itero il processo di confronto altrimenti ritorno
#ifdef WIN32
		char differ;
		differ = stricmp(iName.c_str(), jName.c_str());
		if (differ != 0)
			return differ < 0 ? true : false;
#else
		if (TFilePath(iName) != TFilePath(jName))
			return TFilePath(iName) < TFilePath(jName);
#endif
		i1 = i2 + 1;
		j1 = j2 + 1;
		i2 = m_path.find("\\", i1);
		j2 = fp.m_path.find("\\", j1);
	}
	iName = m_path.substr(i1, m_path.size() - i1);
	jName = fp.m_path.substr(j1, fp.m_path.size() - j1);
#ifdef WIN32
	return stricmp(iName.c_str(), jName.c_str()) < 0;
#else
	return TFilePath(iName) < TFilePath(jName);
#endif
}

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

TFilePath &TFilePath::operator+=(const TFilePath &fp)
{
	assert(!fp.isAbsolute());
	if (fp.isEmpty())
		return *this;
	else if (isEmpty()) {
		*this = fp;
		return *this;
	} else if (m_path.length() != 1 || m_path[0] != slash) {
		*this = TFilePath(m_path + slash + fp.m_path);
		return *this;
	} else {
		*this = TFilePath(m_path + fp.m_path);
		return *this;
	}
}
//-----------------------------------------------------------------------------
TFilePath TFilePath::operator+(const TFilePath &fp) const
{
	TFilePath ret(*this);
	ret += fp;
	return ret;
}
//-----------------------------------------------------------------------------
/*
TFilePath TFilePath::operator+ (const TFilePath &fp) const
{
assert(!fp.isAbsolute());
if(fp.isEmpty()) return *this;
else if(isEmpty()) return fp;
else if(m_path.length()!=1 || m_path[0] != slash) 
  return TFilePath(m_path + slash + fp.m_path);
else 
  return TFilePath(m_path + fp.m_path);
}
*/
//-----------------------------------------------------------------------------

bool TFilePath::isAbsolute() const
{
	return m_path.length() >= 1 && m_path[0] == slash ||
		   m_path.length() >= 2 && isalpha(m_path[0]) && m_path[1] == ':';
}

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

bool TFilePath::isRoot() const
{
	return m_path.length() == 1 && m_path[0] == slash ||
		   m_path.length() == 3 && isalpha(m_path[0]) && m_path[1] == ':' && m_path[2] == slash;
}

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

// ritorna ""(niente tipo, niente punto), "." (file con tipo) o ".." (file con tipo e frame)
string TFilePath::getDots() const
{
	int i = getLastSlash(m_path);
	string str = m_path.substr(i + 1);
	// potrei anche avere a.b.c.d dove d e' l'estensione
	i = str.rfind(".");
	if (i == string::npos || str == "..")
		return "";
	return str.substr(0, i).rfind(".") == string::npos ? "." : "..";
}

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

string TFilePath::getDottedType() const // ritorna l'estensione con PUNTO (se c'e')
{
	int i = getLastSlash(m_path);
	string str = m_path.substr(i + 1);
	i = str.rfind(".");
	if (i == string::npos)
		return "";
#ifdef WIN32
	return toLower(str.substr(i));
#else
	return str.substr(i);
#endif
}

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

string TFilePath::getUndottedType() const // ritorna l'estensione senza PUNTO
{
	size_t i = getLastSlash(m_path);
	string str = m_path.substr(i + 1);
	i = str.rfind(".");
	if (i == string::npos || i == str.length() - 1)
		return "";
#ifdef WIN32
	return toLower(str.substr(i + 1));
#else
	return str.substr(i + 1);
#endif
}

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

string TFilePath::getName() const // noDot! noSlash!
{
	int i = getLastSlash(m_path); //cerco l'ultimo slash
	string str = m_path.substr(i + 1);
	i = str.rfind(".");
	if (i == string::npos)
		return str;
	int j = str.substr(0, i).rfind(".");
	if (j != string::npos)
		i = j;
	return str.substr(0, i);
}

//-----------------------------------------------------------------------------
// es. TFilePath("/pippo/pluto.0001.gif").getLevelName() == "pluto..gif"
string TFilePath::getLevelName() const
{
	int i = getLastSlash(m_path);	  //cerco l'ultimo slash
	string str = m_path.substr(i + 1); // str e' m_path senza directory
	i = str.find(".");				   // posizione del primo punto di str
	if (i == string::npos)
		return str;			  // no frame; no type
	int j = str.rfind(".");   // str[j..] = ".type"
	if (j == i || j - i == 1) //prova.tif o prova..tif
		return str;
	else //prova.0001.tif
		return str.erase(i + 1, j - i - 1);
}

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

TFilePath TFilePath::getParentDir() const // noSlash!
{
	int i = getLastSlash(m_path); //cerco l'ultimo slash
	if (i < 0) {
		if (m_path.length() >= 2 && ('a' <= m_path[0] && m_path[0] <= 'z' || 'A' <= m_path[0] && m_path[0] <= 'Z') && m_path[1] == ':')
			return TFilePath(m_path.substr(0, 2));
		else
			return TFilePath("");
	} else if (i == 0)
		return TFilePath("/");
	else
		return TFilePath(m_path.substr(0, i));
}

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

TFrameId TFilePath::getFrame() const
{
	int i = getLastSlash(m_path);	  //cerco l'ultimo slash
	string str = m_path.substr(i + 1); // str e' il path senza parentdir
	i = str.rfind('.');
	if (i == string::npos || str == "." || str == "..")
		return TFrameId(TFrameId::NO_FRAME);
	int j = str.substr(0, i).rfind('.');
	if (j == string::npos)
		return TFrameId(TFrameId::NO_FRAME);
	if (i == j + 1)
		return TFrameId(TFrameId::EMPTY_FRAME);

	int k, number = 0;
	for (k = j + 1; k < i && isdigit(str[k]); k++)
		number = number * 10 + str[k] - '0';
	char letter = '\0';
	if (isalpha(str[k]))
		letter = str[k++];
	if (number == 0 || k < i)
		throw TMalformedFrameException();
	return TFrameId(number, letter);
}

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

TFilePath TFilePath::withType(const string &type) const
{
	const string dotDot = "..";
	assert(type.length() < 2 || type.substr(0, 2) != dotDot);
	int i = getLastSlash(m_path);	  //cerco l'ultimo slash
	string str = m_path.substr(i + 1); // str e' il path senza parentdir
	int j = str.rfind('.');
	if (j == string::npos || str == dotDot)
	// il path originale non ha tipo
	{
		if (type == "")
			return *this;
		else if (type[0] == '.')
			return TFilePath(m_path + type);
		else
			return TFilePath(m_path + "." + type);
	} else
	// il path originale ha gia' il tipo
	{
		if (type == "")
			return TFilePath(m_path.substr(0, i + j + 1));
		else if (type[0] == '.')
			return TFilePath(m_path.substr(0, i + j + 1) + type);
		else
			return TFilePath(m_path.substr(0, i + j + 2) + type);
	}
}

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

TFilePath TFilePath::withName(const string &name) const
{
	int i = getLastSlash(m_path);	  //cerco l'ultimo slash
	string str = m_path.substr(i + 1); // str e' il path senza parentdir
	int j = str.rfind('.');
	if (j == string::npos)
		return TFilePath(m_path.substr(0, i + 1) + name);
	int k = str.substr(0, j).rfind(".");
	if (k == string::npos)
		k = j;
	return TFilePath(m_path.substr(0, i + 1) + name + str.substr(k));
}

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

TFilePath TFilePath::withParentDir(const TFilePath &dir) const
{
	int i = getLastSlash(m_path); //cerco l'ultimo slash
	return dir + TFilePath(m_path.substr(i + 1));
}

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

TFilePath TFilePath::withFrame(const TFrameId &frame, TFrameId::FrameFormat format) const
{
	const string dot = ".", dotDot = "..";
	int i = getLastSlash(m_path);	  //cerco l'ultimo slash
	string str = m_path.substr(i + 1); // str e' il path senza parentdir
	assert(str != dot && str != dotDot);
	int j = str.rfind('.');
	if (j == string::npos) {
		if (frame.isEmptyFrame() || frame.isNoFrame())
			return *this;
		else
			return TFilePath(m_path + "." + frame.expand(format));
	}

	string frameString;
	if (frame.isNoFrame())
		frameString = "";
	else
		frameString = "." + frame.expand(format);

	int k = str.substr(0, j).rfind('.');
	if (k == string::npos)
		return TFilePath(m_path.substr(0, j + i + 1) + frameString + str.substr(j));
	else
		return TFilePath(m_path.substr(0, k + i + 1) + frameString + str.substr(j));
}

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

bool TFilePath::isAncestorOf(const TFilePath &fp) const
{
	size_t len = m_path.length();

	if (len == 0) {
		// il punto e' antenato di tutti i path non assoluti
		return !fp.isAbsolute();
	}

	return len < fp.m_path.length()		   // l'antenato deve essere piu' corto
		   && (m_path[len - 1] == slash	// deve finire con slash se e' "/" o "C:\"
			   || fp.m_path[len] == slash) // negli altri casi ci deve essere uno slash subito dopo
		   &&
#ifdef WIN32
		   toLower(m_path) == toLower(fp.m_path.substr(0, len));
#else
		   m_path == fp.m_path.substr(0, len);
#endif
}

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

TFilePath TFilePath::operator-(const TFilePath &fp) const
{
#ifdef WIN32
	if (toLower(m_path) == toLower(fp.m_path))
		return TFilePath("");
#else
	if (m_path == fp.m_path)
		return TFilePath("");
#endif
	if (!fp.isAncestorOf(*this))
		return *this;
	int len = fp.m_path.length();
	if (len == 0 || fp.m_path[len - 1] != slash)
		len++;

	return TFilePath(m_path.substr(len));
}

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

bool TFilePath::match(const TFilePath &fp) const
{
	return getParentDir() == fp.getParentDir() &&
		   getName() == fp.getName() &&
		   getFrame() == fp.getFrame() &&
		   getType() == fp.getType();
}

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

TFilePath TFilePath::decode(const std::map<string, string> &dictionary) const
{
	TFilePath parent = getParentDir();
	TFilePath filename = withParentDir("");
	std::map<string, string>::const_iterator it = dictionary.find(filename.getFullPath());
	if (it != dictionary.end())
		filename = TFilePath(it->second);
	if (parent.isEmpty())
		return filename;
	else
		return parent.decode(dictionary) + filename;
}