//
// This file is part of the aMule Project.
//
// Copyright (c) 2003-2011 aMule Team ( admin@amule.org / http://www.amule.org )
// Copyright (c) 2002-2011 Merkur ( devs@emule-project.net / http://www.emule-project.net )
//
// Any parts of this program derived from the xMule, lMule or eMule project,
// or contributed by third-party developers are copyrighted by their
// respective authors.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 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 General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
//

#ifndef OTHERFUNCTIONS_H
#define OTHERFUNCTIONS_H

#include <wx/intl.h>		// Needed for wxLANGUAGE_ constants

#include "Types.h"		// Needed for uint16, uint32 and uint64
#include "Preferences.h"	// Needed for AllCategoryFilter enumeration

#include <algorithm>		// Needed for std::for_each	// Do_not_auto_remove (mingw-gcc-3.4.5)


class CPath;


/**
 * Helper function.
 *
 * @param ArgA The base value.
 * @param ArgB The value to compare ArgA against.
 * @return See below.
 *
 * Use this function to safely compare two arguments of a type that supports 
 * the "<" operator. It works like strcmp and returns a negative value if ArgA
 * is less than ArgB, zero if ArgA is equal to ArgB and a positive value if 
 * ArgA is greater than ArgB.
 */
template <class TYPE>
int CmpAny(const TYPE& ArgA, const TYPE& ArgB)
{
	if ( ArgA < ArgB ) {
		return -1;
	} else if ( ArgB < ArgA ) {
		return  1;
	} else {
		return  0;
	}
}

//! Overloaded version of CmpAny for use with wxStrings.
inline int CmpAny(const wxString& ArgA, const wxString& ArgB)
{
	if (ArgA.IsEmpty() && !ArgB.IsEmpty()) {
		return -1;
	} else if (!ArgA.IsEmpty() && ArgB.IsEmpty()) {
		return 1;
	} else if (ArgA.IsEmpty() && ArgB.IsEmpty()) {
		return 0;
	} else {
		return ArgA.CmpNoCase( ArgB );
	}
}

//! Overloaded version of CmpAny for use with C-Strings (Unicoded).
inline int CmpAny(const wxChar* ArgA, const wxChar* ArgB)
{
	return CmpAny(wxString( ArgA ), wxString( ArgB ));
}


/**
 * Removes the first instance of a value from a STL-like list: list, vector or deque.
 *
 * @param list The list to manipulate.
 * @param item The value to search for and remove.
 * @return The number of instances removed.
 */
template <typename LIST, typename ITEM>
unsigned int EraseFirstValue( LIST& list, const ITEM& item )
{
	typename LIST::iterator it = list.begin();

	for (; it != list.end(); ++it) {
		if (*it == item) {
			list.erase(it);
			
			return true;
		}
	}

	return false;
}


/**
 * Removes all instances of a value from a STL-like list: list, vector or deque.
 *
 * @param list The list to manipulate.
 * @param item The value to search for and remove.
 * @return The number of instances removed.
 */
template <typename LIST, typename ITEM>
unsigned int EraseValue( LIST& list, const ITEM& item )
{
	typename LIST::iterator it = list.begin();
	unsigned int count = 0;

	for ( ; it != list.end(); ) {
		if ( *it == item ) {
			it = list.erase( it );
			count++;
		} else {
			++it;
		}
	}

	return count;
}


//! Used by DeleteContents
struct SDoDelete
{
	// Used for lists, vectors, deques, etc.
	template <typename TYPE>
	void operator()(TYPE* ptr) {
		delete ptr;
	}

	// Used for maps, hashmaps, rangemaps, etc.
	template <typename FIRST, typename SECOND>
	void operator()(const std::pair<FIRST, SECOND>& pair) {
		delete pair.second;
	}		
};


/** Frees the contents of a list or map like stl container, clearing it afterwards. */
template <typename STL_CONTAINER>
void DeleteContents(STL_CONTAINER& container)
{
	// Ensure that the actual container wont contain dangling pointers during
	// this operation, to ensure that the destructors cant access them.
	STL_CONTAINER copy;
	
	std::swap(copy, container);
	std::for_each(copy.begin(), copy.end(), SDoDelete());
}


/**
 * Copies elements from the range [first, first + n) to the range [result, result + n).
 */
template <class InputIterator, class OutputIterator>
OutputIterator STLCopy_n(InputIterator first, size_t n, OutputIterator result)
{
	return std::copy(first, first + n, result);
}


/**
 * Returns a description of the version of aMule being used.
 *
 * @return A detailed description of the aMule version, including wx information.
 *
 * Use this rather than just using the VERSION or CURRENT_VERSION_LONG
 * constants, when displaying information to the user. The purpose is to
 * help with debugging.
 */
wxString GetMuleVersion();


/**
 * Helperfunction for accessing a child of the calling widget.
 *
 * @param IdOrName The ID or the Name of the widget to find.
 * @param type The widget-type to cast the found widget to.
 *
 * Use this function as a replacement for the following constructs:
 *  - wxStaticCast( FindWindow( <IdOrName> ), <type> )
 *  - (<type>*)FindWindow( <IdOrName> )
 *
 * It has the advantage of validating the cast in debug builds and being much
 * shorter than than manually typing wxStaticCast + FindWindow. This mean that
 * we will be alerted in case of widget changing type, instead of getting just 
 * getting bad mojo due to casting a pointer to the wrong type.
 */
#define CastChild( IdOrName, type )			dynamic_cast<type*>( FindWindow( IdOrName ) )


/**
 * Helperfunction for accessing the child of a any widget by ID.
 *
 * @param ID The ID of the widget to find.
 * @param parent The parent of the widget to find, or NULL to search from the top.
 * @param type The type to cast the widget to.
 *
 * @see CastChild()
 */
#define CastByID( ID, parent, type )		dynamic_cast<type*>( wxWindow::FindWindowById( (ID), (parent) ) )


/**
 * Helperfunction for accessing the child of a any widget by Name.
 *
 * @param Name The Name of the widget to find.
 * @param parent The parent of the widget to find, or NULL to search from the top.
 * @param type The type to cast the widget to.
 *
 * @see CastChild()
 */
#define CastByName( Name, parent, type )	dynamic_cast<type*>( wxWindow::FindWindowByName( (Name), (parent) ) )


// From Gnucleus project [found by Tarod]
// Base16/Base32/Base64 Encode/Decode functions
wxString EncodeBase16(const unsigned char* buffer, unsigned int bufLen);
unsigned int DecodeBase16(const wxString &base16Buffer, unsigned int base16BufLen, unsigned char *buffer);
wxString EncodeBase32(const unsigned char* buffer, unsigned int bufLen);
unsigned int DecodeBase32(const wxString &base32Buffer, unsigned int base32BufLen, unsigned char *buffer);
wxString EncodeBase64(const char* buffer, unsigned int bufLen);
unsigned int DecodeBase64(const wxString &base64Buffer, unsigned int base64BufLen, unsigned char *buffer);

// Converts the number of bytes to human readable form.
wxString CastItoXBytes(uint64 count);
// Converts the number to human readable form, abbreviating when nessecary.
wxString CastItoIShort(uint64 number);
// Converts a number of bytes to a human readable speed value.
wxString CastItoSpeed(uint32 bytes);
// Converts an amount of seconds to human readable time.
wxString CastSecondsToHM(uint32 seconds, uint16 msecs = 0);
// Returns the amount of Bytes the provided size-type represents
uint32 GetTypeSize(uint8 type);
// Returns the string associated with a file-rating value.
wxString GetRateString(uint16 rate);


// The following functions are used to identify and/or name the type of a file
enum FileType { ftAny, ftVideo, ftAudio, ftArchive, ftCDImage, ftPicture, ftText, ftProgram };
// Examins a filename and returns the enumerated value assosiated with it, or ftAny if unknown extension
FileType GetFiletype(const CPath& filename);
// Returns the description of a filetype: Movies, Audio, Pictures and so on...
wxString GetFiletypeDesc(FileType type, bool translated = true);
// Shorthand for GetFiletypeDesc(GetFiletype(filename))
wxString GetFiletypeByName(const CPath& filename, bool translated = true);


// Returns the name associated with a category value.
wxString GetCatTitle(AllCategoryFilter cat);

/* Other */


//! Returns the number of items in an array.
#define itemsof(x) (sizeof(x)/sizeof(x[0]))


///////////////////////////////////////////////////////////////////////////////
// ED2K File Type
//

enum EED2KFileType
{
	ED2KFT_ANY,
	ED2KFT_AUDIO,
	ED2KFT_VIDEO,
	ED2KFT_IMAGE,
	ED2KFT_PROGRAM,
	ED2KFT_DOCUMENT,
	ED2KFT_ARCHIVE,
	ED2KFT_CDIMAGE
};

class EED2KFileTypeClass
{
public:
	EED2KFileTypeClass()
	{
		s_t = ED2KFT_ANY;
	}
	EED2KFileTypeClass(EED2KFileType t)
	{
		s_t = t;
	}
	EED2KFileType GetType() const
	{
		return s_t;
	}
	
private:
	EED2KFileType s_t;
};

EED2KFileType GetED2KFileTypeID(const CPath& fileName);
wxString GetED2KFileTypeSearchTerm(EED2KFileType iFileID);
wxString GetFileTypeByName(const CPath& fileName);
EED2KFileType GetED2KFileTypeSearchID(EED2KFileType iFileID);
///////////////////////////////////////////////////////////////////////////////

// md4cmp -- replacement for memcmp(hash1,hash2,16)
// Like 'memcmp' this function returns 0, if hash1==hash2, and !0, if hash1!=hash2.
// NOTE: Do *NOT* use that function for determining if hash1<hash2 or hash1>hash2.
inline int md4cmp(const void* hash1, const void* hash2)
{
	return memcmp(hash1, hash2, 16);
}


// md4clr -- replacement for memset(hash,0,16)
inline void md4clr(void* hash)
{
	memset(hash, 0, 16);
}


// md4cpy -- replacement for memcpy(dst,src,16)
inline void md4cpy(void* dst, const void* src)
{
	memcpy(dst, src, 16);
}


// DumpMem ... Dumps mem ;)
wxString DumpMemToStr(const void *buff, int n, const wxString& msg = wxEmptyString, bool ok = true);
void DumpMem(const void *buff, int n, const wxString& msg = wxEmptyString, bool ok = true);
void DumpMem_DW(const uint32 *ptr, int count);

// Returns special source ID for GUI.
// It's actually IP<<16+Port
#define GUI_ID(x,y) (uint64)((((uint64)x)<<16) + (uint64)y)
// And so...
#define PORT_FROM_GUI_ID(x) (x & 0xFFFF)
#define IP_FROM_GUI_ID(x) (x >> 16)



inline long int make_full_ed2k_version(int a, int b, int c) {
	return ((a << 17) | (b << 10) | (c << 7));
}


wxString GetConfigDir(const wxString &configFile = wxT("amule.conf"));

#if !wxCHECK_VERSION(2, 9, 0)
enum {
	wxLANGUAGE_ASTURIAN	= wxLANGUAGE_USER_DEFINED + 1
};
#endif

/**
 * Adds aMule's custom languages to db.
 */
void InitCustomLanguages();

/**
 * Initializes locale
 */
void InitLocale(wxLocale& locale, int language);

/**
 * Converts a string locale definition to a wxLANGUAGE id.
 */
int StrLang2wx(const wxString& language);

/**
 * Converts a wxLANGUAGE id to a string locale name.
 */
wxString wxLang2Str(const int lang);

/**
 * Generate MD5Hash of prompt input
 */
wxString GetPassword();


#if wxUSE_THREADS

#include <wx/thread.h>

/**
 * Automatically unlocks a mutex on construction and locks it on destruction.
 *
 * This class is the complement of wxMutexLocker.  It is intended to be used
 * when a mutex, which is locked for a period of time, needs to be
 * temporarily unlocked for a bit.  For example:
 *
 *	wxMutexLocker lock(mutex);
 *
 *	// ... do stuff that requires that the mutex is locked ...
 *
 *	{
 *		CMutexUnlocker unlocker(mutex);
 *		// ... do stuff that requires that the mutex is unlocked ...
 *	}
 *
 *	// ... do more stuff that requires that the mutex is locked ...
 *
 */
class CMutexUnlocker
{
public:
    // unlock the mutex in the ctor
    CMutexUnlocker(wxMutex& mutex)
        : m_isOk(false), m_mutex(mutex)
        { m_isOk = ( m_mutex.Unlock() == wxMUTEX_NO_ERROR ); }

    // returns true if mutex was successfully unlocked in ctor
    bool IsOk() const
        { return m_isOk; }

    // lock the mutex in dtor
    ~CMutexUnlocker()
        { if ( IsOk() ) m_mutex.Lock(); }

private:
    // no assignment operator nor copy ctor
    CMutexUnlocker(const CMutexUnlocker&);
    CMutexUnlocker& operator=(const CMutexUnlocker&);

    bool     m_isOk;
    wxMutex& m_mutex;
};
#endif /* wxUSE_THREADS */


#endif // OTHERFUNCTIONS_H
// File_checked_for_headers