/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   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 .
 */

package graphical;

import helper.OSHelper;
import helper.ProcessHandler;
import helper.StringHelper;
import java.io.File;

public class JPEGCreator extends EnhancedComplexTestCase
{
    public String[] getTestMethodNames()
    {
        return new String[]{"PostscriptOrPDFToJPEG"};
    }

    /**
     * test function.
     */
    public void PostscriptOrPDFToJPEG()
    {
        GlobalLogWriter.set(log);
        ParameterHelper aParam = new ParameterHelper(param);

        // run through all documents found in Inputpath
        foreachPSorPDFinInputPath(aParam);
    }


    public void checkOneFile(String _sDocumentName, String _sResult, ParameterHelper _aParams) throws OfficeException
    {
         GlobalLogWriter.println("  Document: " + _sDocumentName);
         GlobalLogWriter.println("   results: " + _sResult);
         String sJPEGNameSchema = createJPEG(_sDocumentName, "", _aParams);

         // store information only if jpeg files exists
         int nPages = countPages(sJPEGNameSchema);
         if (nPages > 0)
         {
             createSmallPictures(sJPEGNameSchema);

             // read out tolerance file
             String sFileDir = FileHelper.getPath(_sDocumentName);
             String sBasename = FileHelper.getBasename(_sDocumentName);
             int nTolerance = 0;
             String sToleranceFile = FileHelper.appendPath(sFileDir, "tolerance.ini");
             File aToleranceFile = new File(sToleranceFile);
             if (aToleranceFile.exists())
             {
                 IniFile aIniFile = new IniFile(sToleranceFile);
                 nTolerance = aIniFile.getIntValue(sBasename, "accept", 0); // default for all pages
                 aIniFile.close();
             }

             String sIndexFile = FileHelper.appendPath(_sResult, "index.ini");
             File aIndexFile = new File(sIndexFile);
             if (aIndexFile.exists())
             {
                 // store only if an index file exists
                 IniFile aIniFile = new IniFile(sIndexFile);
                 aIniFile.insertValue(sBasename, "jpegschema", sJPEGNameSchema);
                 aIniFile.insertValue(sBasename, "pages", nPages);
                 aIniFile.insertValue(sBasename, "tolerance", nTolerance);
                 aIniFile.close();
             }
         }
         else
         {
             assure("There are no pages in document:'" + _sDocumentName + "', maybe document currupt?", false, true);
         }
    }

/**
 * Create a lot of smaller and nicer Pictures of the big fat pages.
 * Looks better
 * @param _sJPEGSchema
 */
    public void createSmallPictures(String _sJPEGSchema)
    {
        ParameterHelper aParam = new ParameterHelper(param);
        if (! aParam.createSmallPictures())
        {
            return;
        }

        if (_sJPEGSchema.length() > 0)
        {
            // TODO: if there doesn't exists a '%04d' in the schema we will return 9999 which is a little bit wrong here.
            for (int i=1;i<10000;i++)
            {
                String sJPEGFilename = getFilenameForJPEGSchema(_sJPEGSchema, i);
                if (FileHelper.exists(sJPEGFilename))
                {
                    convertToNearSameFileWithWidth340(sJPEGFilename);
                }
                else
                {
                    break;                             // stop file check
                }
            }
        }
        // return nPages;
    }

/**
 * convert a picture to a new picture with 340 pixel width.
 * @param _sJPEGFilename
 */
public static void convertToNearSameFileWithWidth340(String _sJPEGFilename)
{
    ParameterHelper aParam = new ParameterHelper(param);
    if (! aParam.createSmallPictures())
    {
        return;
    }
    String sJPEGFilename = _sJPEGFilename.replaceAll("\\\\", "/");
    String sNewJPEGFilename;
    sNewJPEGFilename = sJPEGFilename.replace(".jpg", "_w340.jpg");
    convertToWidth340(sJPEGFilename, sNewJPEGFilename);
}

    /**
 * convert chart2_Regression.ods.ps_180DPI_0001.jpg -filter Catrom -resize
340x chart2_Regression.ods.ps_180DPI_0001_w340.jpg

Point wie bisher
Cubic schlecht, weil unscharf
...
Triangle ganz brauchbar (default?)
Catrom am besten

 * @param _sFrom
 * @param _To
 */
private static void convertToWidth340(String _sFrom, String _To)
{
            String sConvertEXE = "convert";
            if (OSHelper.isLinuxIntel())
            {
                sConvertEXE = "convert";
            }
            if (OSHelper.isWindows())
            {
                // TODO!
                // HACK Hard coded!
                // sConvertEXE = "C:\\Programme\\ImageMagick-6.0.3-q8\\convert.exe";
                sConvertEXE = "convert.exe";
                String sConvertPath = (String)param.get("imagemagick.path");
                if (sConvertPath != null)
                {
                    sConvertEXE = FileHelper.appendPath(sConvertPath, sConvertEXE);
                }
            }

            String[] sCommandArray =
                {
                    sConvertEXE,
                    _sFrom,
                     "-filter", "Catrom",
                    "-resize", "340x",
                    _To
                };
            ProcessHandler aHandler = new ProcessHandler(sCommandArray);
            aHandler.executeSynchronously();
            aHandler.getExitCode();

            String sBack = aHandler.getOutputText();
            if (sBack.length() > 0)
            {
                GlobalLogWriter.println("'" + sBack + "'");
            }
}

/**
 * create out of a given Postscript/PDF _sFile a list of JPEGs, one for every page
 * @param _sFile
 * @param _sAdditional
 * @param _aParam
 * @return the schema of the first jpeg name
 */
    String createJPEG(String _sFile, String _sAdditional, ParameterHelper _aParam)
        {
            if (_sFile.startsWith("file:///"))
            {
                _sFile = FileHelper.getSystemPathFromFileURL(_sFile);
            }
            File aFile = new File(_sFile);
            if (aFile.exists())
            {
                String sAbsFile = aFile.getAbsolutePath();
                if (!sAbsFile.equals(_sFile))
                {
                    _sFile = sAbsFile;
                }
            }
            else
            {
                GlobalLogWriter.println("File: '" + _sFile + "' doesn't exist.");
                return "";
            }
            String sFileDir = FileHelper.getPath(_sFile);
            String sBasename = FileHelper.getBasename(_sFile);

            String sTmpDir = util.utils.getUsersTempDir();
            if (_aParam.getOutputPath() != null)
            {
                sTmpDir = _aParam.getOutputPath();
            }

            String sJPEGNameSchema = "";
            if (_sFile.toLowerCase().endsWith("ps") ||
                _sFile.toLowerCase().endsWith("prn") ||
                _sFile.toLowerCase().endsWith("pdf"))
            {
                // seems to be a Postscript of PDF file

                sJPEGNameSchema = createJPEGsFromPostscript(sTmpDir, sFileDir, sBasename, _aParam.getResolutionInDPI());
            }
            else if (_sFile.toLowerCase().endsWith("jpg") ||
                     _sFile.toLowerCase().endsWith("jpeg"))
            {
                // do nothing, it's already a picture.
                return _sFile;
            }
            else
            {
                // we assume it's an office document.
                // Office files will not handled here, we need a PS or PDF file
            }
            return sJPEGNameSchema;
        }

        private String getJPEGName(String _sOutputPath, String _sBasename, int _nResolutionInDPI, String _sGS_PageOutput)
        {
            String sName = _sBasename + "_" + String.valueOf(_nResolutionInDPI) + "DPI_" + _sGS_PageOutput + ".jpg";
            String sJPEGName = FileHelper.appendPath(_sOutputPath, sName);
            return sJPEGName;
        }

        /**
     * Create via ghostscript (gs) from the reference file for every page a JPEG file
     *
     * MUST set:
     * m_sOutputPath, m_sReferenceFile, m_sReferencePath
     *
     * return exit code from gs command
     */

     private static final String m_sGS_PageOutput = "%04d";

     private String createJPEGsFromPostscript(String _sOutputPath, String _sSourcePath, String _sSourceFile, int _nResolutionInDPI)
        {
            FileHelper.makeDirectories("", _sOutputPath);

            String sJPEGNameSchema = getJPEGName(_sOutputPath, _sSourceFile, _nResolutionInDPI, m_sGS_PageOutput);
            String sPostscriptOrPDFFile = FileHelper.appendPath(_sSourcePath, _sSourceFile);
            String sGhostscriptEXE = "gs";
            if (OSHelper.isWindows())
            {
                sGhostscriptEXE = "gswin32c.exe";
                String sGhostscriptEXE2 = (String)param.get("gs.exe");
                if (sGhostscriptEXE2 != null)
                {
                    sGhostscriptEXE = sGhostscriptEXE2;
                }
                String sGhostscriptPath = (String)param.get("gs.path");
                if (sGhostscriptPath != null)
                {
                    sGhostscriptEXE = FileHelper.appendPath(sGhostscriptPath, sGhostscriptEXE);
                }
            }

            String[] sCommandArray =
                {
                    sGhostscriptEXE,
                    "-dNOPROMPT",
                    "-dBATCH",
                    "-sDEVICE=jpeg",
                    "-r" + String.valueOf(_nResolutionInDPI),
                    "-dNOPAUSE",
                    "-sOutputFile=" + sJPEGNameSchema,
                    sPostscriptOrPDFFile



                };

// TODO: gives ghostscript an error we can handle?
            ProcessHandler aHandler = new ProcessHandler(sCommandArray);
            boolean bBackValue = aHandler.executeSynchronously();
            assure("There seems to be a problem with ghostscript", bBackValue, true);
            int nExitCode = aHandler.getExitCode();

            if (nExitCode == 0)
            {
                // TODO: return a real filename, due to the fact we don't know how much files are created, maybe better to return a list
                int nPages = countPages(sJPEGNameSchema);
                if (nPages == 0)
                {
                    // return only a valid schema name if there at least one page.
                    sJPEGNameSchema = "";
                    assure("Document '" + sPostscriptOrPDFFile + "' doesn't create pages.", false, true);
                }
            }
            else
            {
                assure("There seems to be a problem with ghostscript and '" + sPostscriptOrPDFFile + "' exit code: " + nExitCode, false, true);
                GlobalLogWriter.println("Warning: There seems to be a problem with '" + sGhostscriptEXE + "'...");
            }

            return sJPEGNameSchema; // sNewJPEGFilename;
        }

    public static String getFilenameForJPEGSchema(String _sJPEGSchema, int _nPage)
        {
            if (_nPage < 1 || _nPage > 9999)
            {
                return "";
            }
            final String sFilename = _sJPEGSchema.replace(m_sGS_PageOutput, StringHelper.createValueString(_nPage, 4));
            return sFilename;
        }

        /**
         * Return the number of really exists JPEG files
         * Give a JPEG Schema which contains something like '%04d' which will be converted by a number between 0001 and 9999 always
         * with leading '0' (zero)
         * @param _sJPEGSchema
         * @return number of really existing pages of a given JPEG schema
         */
    public int countPages(String _sJPEGSchema)
    {
        int nPages = 0;
        if (_sJPEGSchema.length() > 0)
        {
            // TODO: if there doesn't exists a '%04d' in the schema we will return 9999 which is a little bit wrong here.
            for (int i=1;i<10000;i++)
            {
                String sNewJPEGFilename = getFilenameForJPEGSchema(_sJPEGSchema, i);
                if (FileHelper.exists(sNewJPEGFilename))
                {
                    nPages ++;
                }
                else
                {
                    break;                             // stop file check
                }
            }
        }
        return nPages;
    }
}