/*===========================================================================
  Copyright (C) 2014 by the Okapi Framework contributors
-----------------------------------------------------------------------------
  This library is free software; you can redistribute it and/or modify it 
  under the terms of the GNU Lesser General Public License as published by 
  the Free Software Foundation; either version 2.1 of the License, or (at 
  your option) any later version.

  This library 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 Lesser 
  General Public License for more details.

  You should have received a copy of the GNU Lesser General Public License 
  along with this library; if not, write to the Free Software Foundation, 
  Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

  See also the full LGPL text here: http://www.gnu.org/copyleft/lesser.html
===========================================================================*/

import java.io.File;

import net.sf.okapi.common.LocaleId;
import net.sf.okapi.common.Util;
import net.sf.okapi.common.filters.FilterConfigurationMapper;
import net.sf.okapi.common.filters.IFilterConfigurationMapper;
import net.sf.okapi.common.pipeline.IPipelineStep;
import net.sf.okapi.common.pipelinedriver.BatchItemContext;
import net.sf.okapi.common.pipelinedriver.IPipelineDriver;
import net.sf.okapi.common.pipelinedriver.PipelineDriver;
import net.sf.okapi.common.resource.RawDocument;
import net.sf.okapi.filters.openxml.OpenXMLFilter;
import net.sf.okapi.filters.rainbowkit.RainbowKitFilter;
import net.sf.okapi.lib.xliff2.core.Part.GetTarget;
import net.sf.okapi.lib.xliff2.core.Segment;
import net.sf.okapi.lib.xliff2.core.Unit;
import net.sf.okapi.lib.xliff2.processor.DefaultEventHandler;
import net.sf.okapi.lib.xliff2.processor.XLIFFProcessor;
import net.sf.okapi.lib.xliff2.reader.Event;
import net.sf.okapi.steps.common.RawDocumentToFilterEventsStep;
import net.sf.okapi.steps.rainbowkit.creation.ExtractionStep;
import net.sf.okapi.steps.rainbowkit.creation.Parameters;
import net.sf.okapi.steps.rainbowkit.postprocess.MergingStep;

public class Main {
	
	static LocaleId locEN = LocaleId.ENGLISH;
	static LocaleId locFR = LocaleId.fromString("fr");
	static String root;

	public static void main (String[] args) {
		File inputFile = new File("C:\\Users\\ysavourel\\Desktop\\myFile.docx");
		root = inputFile.getParent();
		
		// Extract and XLIFF2 t-kit in a 'pack1' sub-directory in the directory of the input file
		extract(inputFile);
		
		// Make some change in the extracted file
		File xliffFile = new File(root + File.separator 
			+ "pack1" + File.separator + "work" + File.separator 
			+ inputFile.getName() + ".xlf");
		modifyXLIFF(xliffFile);
		
		// Merge the XLIFF2 file back
		// Result goes to the 'done' sub-directory of the 'pack1' directory
		File manifestFile = new File(root + File.separator + "pack1" + File.separator + "manifest.rkm");
		merge(manifestFile);
	}

	private static void extract (File inputFile) {
		try {
			// Create the pipeline driver
			IPipelineDriver driver = createDriver(root);
			// Add the extraction step
			driver.addStep(new RawDocumentToFilterEventsStep());
			// Create and set up the t-kit creation step
			IPipelineStep extStep = new ExtractionStep();
			Parameters params = (Parameters)extStep.getParameters();
			params.setWriterClass("net.sf.okapi.steps.rainbowkit.xliff.XLIFF2PackageWriter");
			// Add the t-kit creation step
			driver.addStep(extStep);
			
			// Add the input file to the driver
			RawDocument rawDoc = new RawDocument(inputFile.toURI(), "UTF-8", locEN, locFR, "okf_openxml");
			// Set the output information (it goes in the manifest)
			String path = inputFile.getAbsolutePath();
			String outputPath = Util.getDirectoryName(path) + File.separator 
				+ Util.getFilename(path, false) + ".out" + Util.getExtension(path);
			File outputFile = new File(outputPath);
			// Create the batch item to process and add it to the driver
			BatchItemContext item = new BatchItemContext(rawDoc, outputFile.toURI(), "UTF-8");
			driver.addBatchItem(item);
			// Run the pipeline
			driver.processBatch();
		}
		catch ( Throwable e ) {
			e.printStackTrace();
		}
	}

	private static void modifyXLIFF (File file) {
		try {
			// Create a processor that add some text at the end 
			// of each non-empty segment
			XLIFFProcessor proc = new XLIFFProcessor();
			proc.add(new DefaultEventHandler() {
				@Override
				public Event handleUnit (Event event) {
					Unit unit = event.getUnit();
					for ( Segment segment : unit.getSegments() ) {
						if ( segment.getSource().isEmpty() ) continue;
						segment.getTarget(GetTarget.CLONE_SOURCE).append(" blah blah...");
					}
					return event;
				}
			});
			// Run the processor (read and write)
			File tmpFile = new File(file.getAbsolutePath()+".tmp");
			proc.run(file, tmpFile);
			file.delete();
			tmpFile.renameTo(file);
		}
		catch ( Throwable e ) {
			e.printStackTrace();
		}
	}
	
	private static void merge (File manifestFile) {
		try {
			IPipelineDriver driver = createDriver(root);
			// Add the extraction step
			driver.addStep(new RawDocumentToFilterEventsStep());
			// Add the t-kit merging step
			driver.addStep(new MergingStep());
			
			// Add the input file (manifest file) to the driver
			RawDocument rawDoc = new RawDocument(manifestFile.toURI(), "UTF-8", locEN, locFR, "okf_rainbowkit-noprompt");
			driver.addBatchItem(rawDoc);
			// Run the pipeline
			driver.processBatch();
		}
		catch ( Throwable e ) {
			e.printStackTrace();
		}
	}

	static IPipelineDriver createDriver (String root) {
		// Create the pipeline driver
		IPipelineDriver driver = new PipelineDriver();
		// Create a filter configuration map
		IFilterConfigurationMapper fcMapper = new FilterConfigurationMapper();
		fcMapper.addConfigurations(OpenXMLFilter.class.getName());
		fcMapper.addConfigurations(RainbowKitFilter.class.getName());
		// Set the filter configuration map to use with the driver
		driver.setFilterConfigurationMapper(fcMapper);
		// Set the root folder for the driver's context
		driver.setRootDirectories(root, root);
		driver.setOutputDirectory(root);
		return driver;
	}

}