/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License") +  you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.openmeetings.converter;

import static org.apache.openmeetings.util.OpenmeetingsVariables.webAppRootKey;

import java.io.File;
import java.io.IOException;
import java.util.Arrays;
import java.util.List;

import org.apache.openmeetings.db.dao.basic.ConfigurationDao;
import org.apache.openmeetings.util.process.ConverterProcessResult;
import org.apache.openmeetings.util.process.ProcessHelper;
import org.red5.logging.Red5LoggerFactory;
import org.slf4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;

public class GenerateSWF {

	public static final Logger log = Red5LoggerFactory.getLogger(GenerateSWF.class, webAppRootKey);

	@Autowired
	private ConfigurationDao configurationDao;

	public final static boolean isPosix = System.getProperty("os.name").toUpperCase().indexOf("WINDOWS") == -1;

	public final static String execExt = isPosix ? "" : ".exe";

	private String getPathToSwfTools() {
		String pathToSWFTools = configurationDao.getConfValue("swftools_path", String.class, "");
		// If SWFTools Path is not blank a File.separator at the end of the path
		// is needed
		if (!"".equals(pathToSWFTools) && !pathToSWFTools.endsWith(File.separator)) {
			pathToSWFTools = pathToSWFTools + File.separator;
		}
		return pathToSWFTools;
	}

	private String getSwfZoom() {
		String valueForSwfZoom = configurationDao.getConfValue("swftools_zoom", String.class, "");
		// WARNING CODE NOT COMPLETE: If SWFTools zoom (dpi) should be an integer between 50 and  600 with a default value of 100 dpi
		if ("".equals(valueForSwfZoom)) {
			valueForSwfZoom = "72";
		}
		return valueForSwfZoom;
	}

	private String getSwfJpegQuality() {
		String valueForSwfJpegQuality = configurationDao.getConfValue("swftools_jpegquality", String.class, "");
		// WARNING CODE NOT COMPLETE: If SWFTools JPEG Quality should be an integer between 1 and 100, with a default value of 85
		if ("".equals(valueForSwfJpegQuality)) {
			valueForSwfJpegQuality = "85";
		}
		return valueForSwfJpegQuality;
	}

	public ConverterProcessResult generateSwf(File originalFolder, File destinationFolder, String fileNamePure) throws IOException {
		
		// Create the Content of the Converter Script (.bat or .sh File)
		String[] argv = new String[] {
				getPathToSwfTools() + "pdf2swf" + execExt, "-s",
				"insertstop", // insert Stop command into every frame
				"-s","poly2bitmap", //http://www.swftools.org/gfx_tutorial.html#Rendering_pages_to_SWF_files
				"-i", // change draw order to reduce pdf complexity
				"-j", "" + getSwfJpegQuality(), // JPEG Quality 
				"-s", "zoom=" + getSwfZoom(), // set zoom dpi 
				new File(originalFolder, fileNamePure + ".pdf").getCanonicalPath(),
				new File(destinationFolder, fileNamePure + ".swf").getCanonicalPath() };

		return ProcessHelper.executeScript("generateSwf", argv);
	}

	/**
	 * Generates an SWF from the list of files.
	 */
	public ConverterProcessResult generateSwfByImages(List<String> images, String outputfile, int fps) {
		List<String> argvList = Arrays.asList(new String[] {
				getPathToSwfTools() + "png2swf" + execExt, "-s", 
				"insertstop", // Insert Stop command into every frame
				"-o", outputfile, "-r", Integer.toString(fps), "-z" });

		argvList.addAll(images);
		return ProcessHelper.executeScript("generateSwfByImages", argvList.toArray(new String[0]));
	}

	/**
	 * Combines a bunch of SWFs into one SWF by concatenate.
	 */
	public ConverterProcessResult generateSWFByCombine(List<String> swfs, String outputswf, int fps) {
		List<String> argvList = Arrays.asList(new String[] {
				getPathToSwfTools() + "swfcombine" + execExt, "-s",
				"insertstop", // Insert Stop command into every frame
				"-o", outputswf, "-r", Integer.toString(fps), "-z", "-a" });

		argvList.addAll(swfs);
		return ProcessHelper.executeScript("generateSWFByCombine", argvList.toArray(new String[0]));
	}

	public ConverterProcessResult generateSWFByFFMpeg(String inputWildCard,
			String outputswf, int fps, int width, int height) {
		// FIXME: ffmpeg should be on the system path
		String[] argv = new String[] { "ffmpeg" + execExt, "-r",
				Integer.toString(fps), "-i", inputWildCard, "-s",
				width + "x" + height, "-b", "750k", "-ar", "44100", "-y",
				outputswf };

		return ProcessHelper.executeScript("generateSWFByFFMpeg", argv);
	}

}