/*
Copyright (c) 2001, Loki software, inc.
All rights reserved.

Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:

Redistributions of source code must retain the above copyright notice, this list
of conditions and the following disclaimer.

Redistributions in binary form must reproduce the above copyright notice, this
list of conditions and the following disclaimer in the documentation and/or
other materials provided with the distribution.

Neither the name of Loki software nor the names of its contributors may be used
to endorse or promote products derived from this software without specific prior
written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
DIRECT,INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

//
// Missing functions
//
// Leonardo Zide (leo@lokigames.com)
//

#include "missing.h"
#include "qsysprintf.h"

#if defined (__linux__) || defined (__APPLE__)

#include <stdio.h>
#include <unistd.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <dirent.h>

bool radCopyFile(const char *lpExistingFileName, const char *lpNewFileName)
{
  FILE *src, *dst;
  void* buf;
  int l;
  bool ret = false;
  char realsrc[PATH_MAX], realdest[PATH_MAX];

  realpath (lpExistingFileName, realsrc);
  realpath (lpNewFileName, realdest);

  src = fopen (realsrc, "rb");
  if ( !src ) {
    return false;
  }
  dst = fopen (realdest, "wb");
  if (!dst) {
    fclose (src);
    return false;
  }

  fseek (src, 0, SEEK_END);
  l = ftell (src);
  rewind (src);
  buf = g_malloc (l);

  if (buf != NULL)
    if (fread (buf, l, 1, src) == 1)
      if (fwrite (buf, l, 1, dst) == 1)
	ret = true;

  g_free (buf);
  fclose (src);
  fclose (dst);

  return ret;
}

bool radCreateDirectory( const char *directory ) {
	if ( mkdir( directory, 0777 ) == -1 ) {
		Sys_Printf( "mkdir %s failed\n", directory );
		return false;
	}
	return true;
}

int GetFullPathName(const char *lpFileName, int nBufferLength, char *lpBuffer, char **lpFilePart)
{
  if (lpFileName[0] == '/')
  {
    strcpy (lpBuffer, lpFileName);
    *lpFilePart = strrchr (lpBuffer, '/');
    return strlen (lpBuffer);
  }

  if (getcwd (lpBuffer, nBufferLength) == NULL)
    return 0;

  strcat (lpBuffer, "/");
  *lpFilePart = lpBuffer + strlen (lpBuffer);
  strcat (lpBuffer, lpFileName);

  char *scr = lpBuffer, *dst = lpBuffer;
  for (int i = 0; (i < nBufferLength) && (*scr != 0); i++)
  {
    if (*scr == '/' && *(scr+1) == '.' && *(scr+2) == '.')
    {
      scr += 4;
      while (dst != lpBuffer && *dst != '/')
      {
	dst--;
	i--;
      }
    }

    *dst = *scr;

    scr++; dst++;
  }
  *dst = 0;

  return strlen (lpBuffer);
}

EPathCheck CheckFile( const char *path ) {
	struct stat		sbuf;
	if ( stat( path, &sbuf ) == -1 ) {
		return PATH_FAIL;
	}
	if ( S_ISDIR( sbuf.st_mode ) ) {
		return PATH_DIRECTORY;
	}
	return PATH_FILE;
}

FindFiles::FindFiles( const char *_directory ) {
	findHandle = opendir( _directory );
}

FindFiles::~FindFiles() {
	if ( findHandle != NULL ) {
		closedir( findHandle );
		findHandle = NULL;
	}
}

const char* FindFiles::NextFile() {
	struct dirent *d;

	if ( findHandle == NULL )
		return NULL;

	d = readdir( findHandle );
	if ( d )
		return d->d_name;
	return NULL;
}

#else

FindFiles::FindFiles( const char *_directory ) {
	char endChar;
	directory = _directory;
	if (directory.GetLength() > 0) {
		endChar = directory.GetAt(directory.GetLength() - 1);
		if (!(endChar == '/' || endChar == '\\')) {
			// We're only using '/' as the path separator throughout this code, not '\'.
			// However, I'd hate to see the code silently fail due to a trailing '\', so
			// I added the check for it.
			directory += '/';
		}
	}
	directory += '*';
	findHandle = INVALID_HANDLE_VALUE;
}

FindFiles::~FindFiles() {
	if ( findHandle != INVALID_HANDLE_VALUE ) {
		FindClose( findHandle );
		findHandle = INVALID_HANDLE_VALUE;
	}
}

const char* FindFiles::NextFile() {
	if ( findHandle == INVALID_HANDLE_VALUE ) {
		findHandle = FindFirstFile( directory.GetBuffer(), &findFileData );
		if ( findHandle == INVALID_HANDLE_VALUE ) {
			return NULL;
		}
		return findFileData.cFileName;
	}
	if ( FindNextFile( findHandle, &findFileData ) == 0 ) {
		FindClose( findHandle );
		findHandle = INVALID_HANDLE_VALUE;
		return NULL;
	}
	return findFileData.cFileName;
}

EPathCheck CheckFile( const char *path ) {
	struct _stat sbuf;
	if ( _stat( path, &sbuf ) == -1 ) {
		return PATH_FAIL;
	}
	if ( ( sbuf.st_mode & _S_IFDIR ) != 0 ) {
		return PATH_DIRECTORY;
	}
	return PATH_FILE;
}

bool radCreateDirectory( const char *directory ) {
	return ( CreateDirectory( directory, NULL ) != false );
}

bool radCopyFile( const char *lpExistingFileName, const char *lpNewFileName ) {
	return ( CopyFile( lpExistingFileName, lpNewFileName, FALSE ) != false );
}

#endif

bool CopyTree( const char *source, const char *dest ) {
	Str				srcEntry;
	Str				dstEntry;
	const char		*dirname;
	FindFiles		fileScan( source );

	while ( ( dirname = fileScan.NextFile() ) != NULL ) {
		if ( strcmp( dirname, "." ) == 0 || strcmp( dirname, ".." ) == 0 ) {
			continue;
		}
		if ( strcmp( dirname, ".svn" ) == 0 ) {
			continue;
		}
		srcEntry = source;
		srcEntry += "/";
		srcEntry += dirname;
		dstEntry = dest;
		dstEntry += "/";
		dstEntry += dirname;
		switch ( CheckFile( srcEntry.GetBuffer() ) ) {
			case PATH_DIRECTORY: {
				if ( CheckFile( dstEntry.GetBuffer() ) == PATH_FAIL ) {
					if ( !radCreateDirectory( dstEntry.GetBuffer() ) ) {
						Sys_Printf( "create directory %s failed\n", dstEntry.GetBuffer() );
						return false;
					}
				}
				bool ret;
				ret = CopyTree( srcEntry.GetBuffer(), dstEntry.GetBuffer() );
				if ( !ret ) {
					return false;
				}
				break;
			}
			case PATH_FILE: {
				Sys_Printf( "copy %s -> %s\n", srcEntry.GetBuffer(), dstEntry.GetBuffer() );
				bool ret = radCopyFile( srcEntry.GetBuffer(), dstEntry.GetBuffer() );
				if ( !ret ) {
					return false;
				}
				break;
			}
		}
	}
	return true;
}