#include <qobject.h>
#include <qmessagebox.h>
#include <iostream>

#include "file.h"
#include "process.h"

#include <unistd.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 );
	}	
}