/*  main.cpp
 *
 *  Copyright (C) 2013-2016  Jaye Evins <evins@snaught.com>
 *
 *  This file is part of gLabels-qt.
 *
 *  gLabels-qt 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 3 of the License, or
 *  (at your option) any later version.
 *
 *  gLabels-qt 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 gLabels-qt.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "model/FileUtil.h"
#include "model/Db.h"
#include "model/Model.h"
#include "model/PageRenderer.h"
#include "model/Version.h"
#include "model/XmlLabelParser.h"

#include "barcode/Backends.h"
#include "merge/Factory.h"

#include <QApplication>
#include <QCommandLineParser>
#include <QDebug>
#include <QLibraryInfo>
#include <QLocale>
#include <QPrinter>
#include <QPrinterInfo>
#include <QTextStream>
#include <QTranslator>


namespace
{
	
#if defined(Q_OS_WIN)
	const QString STDOUT_FILENAME = "CON:";
	const QString STDIN_FILENAME  = "CON:";
#elif defined(Q_OS_LINUX)
	const QString STDOUT_FILENAME = "/dev/stdout";
	const QString STDIN_FILENAME  = "/dev/stdin";
#else
	const QString STDOUT_FILENAME = "/dev/stdout";
	const QString STDIN_FILENAME  = "/dev/stdin";
#endif

}


int main( int argc, char **argv )
{
	QGuiApplication app( argc, argv );

	QCoreApplication::setOrganizationName( "glabels.org" );
	QCoreApplication::setOrganizationDomain( "glabels.org" );
	QCoreApplication::setApplicationName( "glabels-batch-qt" );
	QCoreApplication::setApplicationVersion( glabels::model::Version::LONG_STRING );

	//
	// Setup translators
	//
	QLocale locale = QLocale::system();
	QString qtTranslationsDir = QLibraryInfo::path( QLibraryInfo::TranslationsPath );
	QString myTranslationsDir = glabels::model::FileUtil::translationsDir().canonicalPath();
	
	QTranslator qtTranslator;
	if ( qtTranslator.load( locale, "qt", "_", qtTranslationsDir ) )
	{
		app.installTranslator(&qtTranslator);
	}

	QTranslator glabelsTranslator;
	if ( glabelsTranslator.load( locale, "glabels", "_", myTranslationsDir ) )
	{
		app.installTranslator(&glabelsTranslator);
	}

	QTranslator templatesTranslator;
	if ( templatesTranslator.load( locale, "templates", "_", myTranslationsDir ) )
	{
		app.installTranslator(&templatesTranslator);
	}


	//
	// Parse command line
	//
	const QList<QCommandLineOption> options = {
		{{"p","printer"},
		 QString( QCoreApplication::translate( "main", "Send output to <printer>. (Default=\"%1\")") ).arg( QPrinterInfo::defaultPrinterName() ),
		 QCoreApplication::translate( "main", "printer" ),
		 QPrinterInfo::defaultPrinterName() },
		
		{{"o","output"},
		 QCoreApplication::translate( "main", "Set output filename to <filename>. Set to \"-\" for stdout. (Default=\"output.pdf\")" ),
		 QCoreApplication::translate( "main", "filename" ),
		 "output.pdf" },
		
		{{"s","sheets"},
		 QCoreApplication::translate( "main", "Set number of sheets to <n>. (Default=1)" ),
		 "n", "1" },

		{{"c","copies"},
		 QCoreApplication::translate( "main", "Set number of copies to <n>. (Default=1)" ),
		 "n", "1" },
		
		{{"a","collate"},
		 QCoreApplication::translate( "main", "Collate merge copies." ) },
		
		{{"g","group"},
		 QCoreApplication::translate( "main", "Start each merge group on a new page." ) },
		
		{{"f","first"},
		 QCoreApplication::translate( "main", "Set starting position to <n>. (Default=1)" ),
		 "n", "1" },

		{{"l","outlines"},
		 QCoreApplication::translate( "main", "Print label outlines." ) },
		
		{{"m","crop-marks"},
		 QCoreApplication::translate( "main", "Print crop marks." ) },
		
		{{"r","reverse"},
		 QCoreApplication::translate( "main", "Print in reverse (mirror image)." ) },

		{{"D","define"},
		 QCoreApplication::translate( "main", "Set user variable <var> to <value>" ),
		 QCoreApplication::translate( "main", "var>=<value" ) }
	};


	QCommandLineParser parser;
	parser.setApplicationDescription( QCoreApplication::translate( "main", "gLabels Label Designer (Batch Front-end)" ) );
	parser.addOptions( options );
	parser.addHelpOption();
	parser.addVersionOption();
	parser.addOption( { { "V", "Version" }, QCoreApplication::translate( "main", "More detailed version information." ) } );
	parser.addPositionalArgument( "file",
	                              QCoreApplication::translate( "main", "gLabels project file to print." ),
	                              "file" );
	parser.process( app );

	// Handle verbose version option
	if ( parser.isSet( "Version" ) )
	{
		QTextStream(stdout) << glabels::model::Version::details() << Qt::endl;
		return 0;
	}


	//
	// Parse variable definitions from command line, if any
	//
	QMap<QString,QString> variableDefinitions;
	
	for ( QString definition : parser.values("define") )
	{
		QStringList parts = definition.split( '=' );
		if ( parts.size() != 2 )
		{
			qWarning() << "Error: bad variable definition: " << definition;
			return -1;
		}

		variableDefinitions[ parts[0] ] = parts[1];
	}

	//
	// Initialize subsystems
	//
	glabels::model::Settings::init();
	glabels::model::Db::init();
	glabels::merge::Factory::init();
	glabels::barcode::Backends::init();

	
	if ( parser.positionalArguments().size() == 1 )
	{
		qDebug() << "Batch mode.";

		QString filename = parser.positionalArguments().constFirst();
		if ( filename == "-" )
		{
			filename = STDIN_FILENAME;
		}
		qDebug() << "Project file =" << filename;

		glabels::model::Model *model = glabels::model::XmlLabelParser::readFile( filename );
		if ( model )
		{
			model->variables().setVariables( variableDefinitions );

			QPrinter printer( QPrinter::HighResolution );
			printer.setColorMode( QPrinter::Color );
			if ( parser.isSet("printer") )
			{
				qDebug() << "Printer =" << parser.value("printer");
				printer.setPrinterName( parser.value("printer") );
			}
			else if ( parser.isSet("output") )
			{
				QString outputFilename = parser.value("output");
				if ( outputFilename == "-" )
				{
					outputFilename = STDOUT_FILENAME;
				}
				qDebug() << "Output =" << outputFilename;
				printer.setOutputFileName( outputFilename );
			}
			else
			{
				qDebug() << "Batch mode.  printer =" << QPrinterInfo::defaultPrinterName();
			}

			glabels::model::PageRenderer renderer( model );
			if ( model->merge()->keys().empty() )
			{
				// Simple project (no merge)
				if ( parser.isSet( "sheets" ) )
				{
					// Full sheets of simple items
					renderer.setNCopies( parser.value( "sheets" ).toInt() * model->frame()->nLabels() );
					renderer.setStartItem( 0 );
				}
				else if ( parser.isSet( "copies" ) )
				{
					// Partial sheet(s) of simple items
					renderer.setNCopies( parser.value( "copies" ).toInt() );
					renderer.setStartItem( parser.value( "first" ).toInt() - 1 );
				}
				else
				{
					// One full sheet of simple items
					renderer.setNCopies( model->frame()->nLabels() );
					renderer.setStartItem( 0 );
				}
			}
			else
			{
				// Project with merge
				renderer.setNCopies( parser.value( "copies" ).toInt() );
				renderer.setStartItem( parser.value( "first" ).toInt() - 1 );
				renderer.setIsCollated( parser.isSet( "collate" ) );
				renderer.setAreGroupsContiguous( !parser.isSet( "group" ) );
			}
			renderer.setPrintOutlines( parser.isSet( "outlines" ) );
			renderer.setPrintCropMarks( parser.isSet( "crop-marks" ) );
			renderer.setPrintReverse( parser.isSet( "reverse" ) );

			// Item and page count summary
			if ( renderer.nPages() == 1 )
			{
				if ( renderer.nItems() == 1 )
				{
					qDebug() <<  "Printing 1 item on 1 page.";
				}
				else
				{
					qDebug() <<  "Printing" << renderer.nItems() << "items on 1 page.";
				}
			}
			else
			{
				qDebug() << "Printing" << renderer.nItems() << "items on" << renderer.nPages() << "pages.";
			}

			// Do it!
			renderer.print( &printer );
		}
	}
	else
	{
		if ( parser.positionalArguments().size() == 0 )
		{
			qWarning() << "Error: missing glabels project file.";
		}
		else
		{
			qWarning() << "Error: batch mode supports only one glabels project file.";
		}
		return -1;
	}
		
	return 0;
}