#include <qobject.h>

#include <qmessagebox.h>

#include <iostream>

#include "file.h"

#include "process.h"

QString maskPath(QString p)

{

	// Change " " to "\ " to enable blanks in filenames

	p=p.replace(QChar('&'),"\\&");

	return p.replace(QChar(' '),"\\ ");

}

QString convertToRel (const QString &src, const QString &dst)

{

	QString s=src;

	QString d=dst;

	int i;

	if (s==d) 

	{

		// Special case, we just need the name of the file,

		// not the complete path

		i=d.findRev ("/");

		d=d.right (d.length()-i-1);

	} else

	{

		// Find relative path from src to dst

		// Remove the first "/"

		if (s.section ("/",0,0).isEmpty()) 

		{

			s=s.right (s.length()-1);

			d=d.right (d.length()-1);

		}

		// remove identical left parts

		while (s.section("/",0,0) == d.section("/",0,0) ) 

		{

			i=s.find ("/");

			s=s.right (s.length()-i-1);

			d=d.right (d.length()-i-1);

		}

		// Now take care of paths where we have to go back first

		int srcsep=s.contains("/");

		int dstsep=d.contains("/");

		if (srcsep <=  dstsep )

		{

			// find path to go up first and then back to dst

			i=1;

			while (i<=srcsep) 

			{

				d="../"+d;

				i++;

			}	

		}

	}	

	return d;

}

QString makeUniqueDir (QString s)

{

	// Create unique directory e.g. s="/tmp/vym-XXXXXX"

	// Convert QString to string first

	char *p;

	int bytes=s.length();

	p=(char*) malloc (bytes+1);

	int i;

	for (i=0;i<bytes;i++)

		p[i]=s.at(i).latin1();

	p[bytes]=0;	

	QString r=mkdtemp (p);

	free (p);

	return r;

}

void removeDir(QDir d)

{

	if (d.path().left(4)!="/tmp")

	{

		// This _should_ not be necessary, but proved to be useful ;-)

		qWarning ("file.cpp::removeDir should remove "+d.path()+" - aborted.");

		return;

	}

	// Traverse directories

	d.setFilter( QDir::Dirs| QDir::Hidden | QDir::NoSymLinks );

	const QFileInfoList *dirlist = d.entryInfoList();

	QFileInfoListIterator itdir( *dirlist );

	QFileInfo *fi;

	while ( (fi = itdir.current()) != 0 ) 

	{

		if (fi->fileName() != "." && fi->fileName() != ".." )

		{

			if ( !d.cd(fi->fileName()) ) 

				qWarning ("removeDir() cannot find the directory "+fi->fileName());

			else 

			{

				// Recursively remove subdirs

				removeDir (d);

				d.cdUp();

			}

		}	

		++itdir;

	}		

	// Traverse files

	d.setFilter( QDir::Files| QDir::Hidden | QDir::NoSymLinks );

	const QFileInfoList *filelist = d.entryInfoList();

	QFileInfoListIterator itfile( *filelist );

	while ( (fi = itfile.current()) != 0 ) 

	{

		QFile (fi->filePath()).remove();

		++itfile;

	}	

	if (!d.rmdir(d.path()))

		qWarning ("removeDir("+d.path()+") failed!");

}		

void makeSubDirs (const QString &s)

{

	QDir d(s);

	d.mkdir(s);

	d.mkdir ("images");	

	d.mkdir ("flags");	

}

ErrorCode zipDir (const QDir &zipDir, const QString &zipName)

{

	ErrorCode err=success;

	// zip the temporary directory

	Process *zipProc=new Process ();

	zipProc->clearArguments();

	zipProc->setWorkingDirectory (QDir(zipDir));

	zipProc->addArgument ("zip");

	zipProc->addArgument ("-r");

	zipProc->addArgument (zipName);

	zipProc->addArgument (".");

	if (!zipProc->start() )

	{	

		// zip could not be started

		QMessageBox::critical( 0, QObject::tr( "Critical Error" ),

					   QObject::tr("Couldn't start zip to compress data."));

		err=aborted;

	} else

	{

		// zip could be started

		zipProc->waitFinished();

		if (!zipProc->normalExit() )

		{

			QMessageBox::critical( 0, QObject::tr( "Critical Error" ),

						   QObject::tr("zip didn't exit normally")+

						   "\n" + zipProc->getErrout());

			err=aborted;

		} else

		{

			if (zipProc->exitStatus()>0)

			{

				QMessageBox::critical( 0, QObject::tr( "Critical Error" ),

						   QString("zip exit code:  %1").arg(zipProc->exitStatus() )+

						   "\n" + zipProc->getErrout() );

				err=aborted;

			}

		}

	}	// zip could be started

	return err;	

}

ErrorCode unzipDir (const QDir &zipDir, const QString &zipName)

{

	ErrorCode err=success;

	// Try to unzip file

	Process *zipProc=new Process ();

	zipProc->clearArguments();

	zipProc->setWorkingDirectory (zipDir);

	zipProc->addArgument ("unzip");

	zipProc->addArgument ("-o");	// overwrite existing files!

	zipProc->addArgument (zipName );

	zipProc->addArgument ("-d");

	zipProc->addArgument (zipDir.path());

	if (!zipProc->start() )

	{

		QMessageBox::critical( 0, QObject::tr( "Critical Error" ),

					   QObject::tr("Couldn't start unzip to decompress data."));

		err=aborted;

	} else

	{

		zipProc->waitFinished();

		if (!zipProc->normalExit() )

		{

			QMessageBox::critical( 0,QObject::tr( "Critical Error" ),

						   QObject::tr("unzip didn't exit normally") +

						   zipProc->getErrout() );

			err=aborted;

		} else

		{

			if (zipProc->exitStatus()>0)

			{

				if (zipProc->exitStatus()==9)

					// no zipped file, but maybe .xml or old version? Try again.

					err=nozip;

				else	

				{

					QMessageBox::critical( 0, QObject::tr( "Critical Error" ),

								   QString("unzip exit code:  %1").arg(zipProc->exitStatus() ) +

								   zipProc->getErrout() );

					err=aborted;

				}

			} 

		}

	}

	return err;	

}

bool loadStringFromDisk (const QString &fname, QString &s)

{

	s="";

	QFile file ( fname);

	if ( !file.open( IO_ReadOnly ) ) return false;

	QTextStream ts( &file );

	ts.setEncoding (QTextStream::UnicodeUTF8);

	while ( !ts.atEnd() ) 

		s+=ts.readLine()+"\n"; 

	file.close();

	return true;

}

bool saveStringToDisk (const QString &fname, const QString &s)

{

	QFile file( fname);

	file.setName ( fname);

	if ( !file.open( IO_WriteOnly ) ) 

	{

		file.close();

		return false;

	}	

	// Write it finally, and write in UTF8, no matter what 

	QTextStream ts( &file );

	ts.setEncoding (QTextStream::UnicodeUTF8);

	ts << s;

	file.close();

	return true;

}

ImagePreview::ImagePreview (QWidget *par=0): QLabel (par)

{

	fdia=(QFileDialog*)par;

}

void ImagePreview::previewUrl( const QUrl &u )

{

    QString path = u.path();

    QPixmap pix( path );

    if ( pix.isNull() )

	{

		// Strange: If we have fd->setMode (QFileDialog::ExistingFiles)

		// in the filedialog, then there are 3 calls to previewURL 

		// for each selection. And only the first is the actual selected file

		// while the following 2 point to the directory above the current one.

		// So here's my workaround:

		if (fdia && fdia->selectedFiles().count()==0)

			setText( QObject::tr("This is not an image.") );

		if (fdia &&fdia->selectedFiles().count()>1)

			setText( QObject::tr("Sorry, no preview for\nmultiple selected files.") );

	}	

    else

	{

		float max_w=300;

		float max_h=300;

		float r;

		if (pix.width()>max_w)

		{

			r=max_w / pix.width();

			pix.resize(qRound(pix.width()*r), qRound(pix.height()*r));

			// FIXME not a resize, but a shrink/enlarge is needed here...

		}

		if (pix.height()>max_h)

		{

			r=max_h / pix.height();

			pix.resize(qRound(pix.width()*r), qRound(pix.height()*r));

			// FIXME not a resize, but a shrink/enlarge is needed here...

		}

        setPixmap( pix );

	}	

}