using System;
using System.IO;
using unoidl.com.sun.star.beans;
using unoidl.com.sun.star.frame;
using unoidl.com.sun.star.lang;
using unoidl.com.sun.star.uno;


namespace RobvanderWoude
{
	class ODT2PDF
	{
		static int Main( string[] args )
		{
			try
			{
				if ( args.Length == 0 )
				{
					return WriteError( null );
				}
				if ( args.Length == 1 || args.Length == 2 )
				{
					if ( args[0] == "/?" )
					{
						return WriteError( null );
					}
					string fileIn = Path.GetFullPath( args[0] );
					if ( !File.Exists( fileIn ) )
					{
						return WriteError( "Input file does not exist" );
					}
					string fileOut;
					if ( args.Length == 2 )
					{
						fileOut = Path.GetFullPath( args[1] );
					}
					else
					{
						string parent = Directory.GetParent( fileIn ).FullName;
						if ( parent.EndsWith( "\\" ) )
						{
							fileOut = parent + Path.GetFileNameWithoutExtension( fileIn ) + ".pdf";
						}
						else
						{
							fileOut = parent + "\\" + Path.GetFileNameWithoutExtension( fileIn ) + ".pdf";
						}

					}
					if ( !Directory.GetParent( fileOut ).Exists )
					{
						return WriteError( "Parent folder of output file does not exist" );
					}
					string extIn = Path.GetExtension( fileIn ).ToLower( );
					if ( extIn == ".odt" )
					{
						if ( SaveOdtAsPdf( fileIn, fileOut ) )
						{
							return 0;
						}
						else
						{
							return WriteError( "Could not convert and save the file" );
						}
					}
					else
					{
						return WriteError( "Invalid input file type/extension" );
					}
				}
				else
				{
					return WriteError( null );
				}
			}
			catch ( System.Exception e )
			{
				return WriteError( e.Message );
			}
		}

		static bool SaveOdtAsPdf( string fileIn, string fileOut )
		{
			try
			{
				// The main functionality uses OpenOffice's UNO components
				// http://en.wikipedia.org/wiki/Universal_Network_Objects
				string urlIn = "file:///" + Path.GetFullPath( fileIn ).Replace( "\\", "/" );
				string urlOut = "file:///" + Path.GetFullPath( fileOut ).Replace( "\\", "/" );
				XComponentContext unoBootstrap = uno.util.Bootstrap.bootstrap( );
				XMultiServiceFactory unoServiceMan = (XMultiServiceFactory)unoBootstrap.getServiceManager( );
				XComponentLoader unoDesk = (XComponentLoader)unoServiceMan.createInstance( "com.sun.star.frame.Desktop" );
				PropertyValue[] inputProperties = new PropertyValue[1];
				inputProperties[0] = new PropertyValue( );
				inputProperties[0].Name = "Hidden";
				inputProperties[0].Value = new uno.Any( true );
				XComponent unoDoc = unoDesk.loadComponentFromURL( urlIn, "_blank", 0, inputProperties );
				PropertyValue[] outputProperties = new PropertyValue[1];
				outputProperties[0] = new PropertyValue( );
				outputProperties[0].Name = "FilterName";
				outputProperties[0].Value = new uno.Any( "writer_pdf_Export" );
				( (XStorable)unoDoc ).storeToURL( urlOut, outputProperties );
				( (XComponent)unoDoc ).dispose( );
				unoDoc = null;
				return true;
			}
			catch ( unoidl.com.sun.star.uno.Exception )
			{
				return false;
			}
		}

		#region Error Handling

		public static int WriteError( string errorMessage )
		{
			if ( string.IsNullOrEmpty( errorMessage ) == false )
			{
				Console.Error.WriteLine( );
				Console.ForegroundColor = ConsoleColor.Red;
				Console.Error.Write( "ERROR: " );
				Console.ForegroundColor = ConsoleColor.White;
				Console.Error.WriteLine( errorMessage );
				Console.ResetColor( );
			}

			/*
			ODT2PDF,  Version 1.01
			Save LibreOffice/OpenOffice Writer files as PDF

			Usage:    ODT2PDF  inputfile.odt  [ outputfile.pdf ]

			Where:    inputfile.odt    is the LibreOffice file to be saved as PDF
			          outputfile.pdf   is the path of the output PDF file
			                           (default: name and parent folder of inputfile)

			Notes:    Requires LibreOffice, its SDK and a Java runtime.
			          Tested with LibreOffice 4.1.4.2 and Java 1.7.0_51-b13.
			          Should also work with OpenOffice.

			Written by Rob van der Woude
			http://www.robvanderwoude.com
			 */

			Console.Error.WriteLine( );
			Console.Error.WriteLine( "ODT2PDF,  Version 1.01" );
			Console.Error.WriteLine( "Save LibreOffice/OpenOffice Writer files as PDF" );
			Console.Error.WriteLine( );
			Console.Error.Write( "Usage:    " );
			Console.ForegroundColor = ConsoleColor.White;
			Console.Error.WriteLine( "ODT2PDF  inputfile.odt  [ outputfile.pdf ]" );
			Console.ResetColor( );
			Console.Error.WriteLine( );
			Console.Error.Write( "Where:    " );
			Console.ForegroundColor = ConsoleColor.White;
			Console.Error.Write( "inputfile.odt" );
			Console.ResetColor( );
			Console.Error.WriteLine( "    is the LibreOffice file to be saved as PDF" );
			Console.ForegroundColor = ConsoleColor.White;
			Console.Error.Write( "          outputfile.pdf" );
			Console.ResetColor( );
			Console.Error.WriteLine( "   is the path of the output PDF file" );
			Console.Error.WriteLine( "                           (default: name and parent folder of inputfile)" );
			Console.Error.WriteLine( );
			Console.Error.WriteLine( "Notes:    Requires LibreOffice, its SDK and a Java runtime." );
			Console.Error.WriteLine( "          Tested with LibreOffice 4.1.4.2 and Java 1.7.0_51-b13." );
			Console.Error.WriteLine( "          Should also work with OpenOffice." );
			Console.Error.WriteLine( );
			Console.Error.WriteLine( "Written by Rob van der Woude" );
			Console.Error.WriteLine( "http://www.robvanderwoude.com" );
			Console.OpenStandardOutput( );
			return 1;
		}

		#endregion Error Handling
	}
}