package net.sf.statcvs.reports;

 import java.util.Iterator;

 import java.util.regex.Matcher;

 import java.util.regex.Pattern;

 import net.sf.statcvs.Messages;

 import net.sf.statcvs.model.VersionedFile;

 import net.sf.statcvs.output.ReportConfig;

 import net.sf.statcvs.reportmodel.IntegerColumn;

 import net.sf.statcvs.reportmodel.RatioColumn;

 import net.sf.statcvs.reportmodel.SimpleTextColumn;

 import net.sf.statcvs.reportmodel.Table;

 import net.sf.statcvs.util.IntegerMap;

 public class FileTypeReport implements TableReport {

     private final static String NON_CODE_FILES = "@@@NON-CODE FILES";

     private final static String NO_EXTENSION = "@@@NO EXTENSION";

     private final static Pattern extensionPattern = Pattern.compile(".*[^.]\\.([CH]|[a-z0-9_-]+)");

     private final ReportConfig config;

     private Table table;

     public FileTypeReport(final ReportConfig config) {

         this.config = config;

     }

     public void calculate() {

         final IntegerMap lines = new IntegerMap();

         final IntegerMap counts = new IntegerMap();

         lines.put(NON_CODE_FILES, 0);

         lines.put(NON_CODE_FILES, 0);

         Iterator it = this.config.getRepository().getFiles().iterator();

         while (it.hasNext()) {

             final VersionedFile file = (VersionedFile) it.next();

             if (file.isDead()) {

                 continue;

             }

             if (file.getCurrentLinesOfCode() == 0) {

                 counts.addInt(NON_CODE_FILES, 1);

             } else {

                 lines.addInt(getExtension(file.getFilename()), file.getCurrentLinesOfCode());

                 counts.addInt(getExtension(file.getFilename()), 1);

             }

         }

         final SimpleTextColumn typeCol = new SimpleTextColumn(Messages.getString("FILE_TYPE"));

         typeCol.setTotal("Totals");

         final IntegerColumn filesCol = new IntegerColumn(Messages.getString("FILES"));

         final IntegerColumn linesCol = new IntegerColumn(Messages.getString("FILE_LOC"));

         this.table = new Table("File Extensions");

         this.table.setShowTotals(true);

         this.table.setKeysInFirstColumn(true);

         this.table.addColumn(typeCol);

         this.table.addColumn(filesCol);

         this.table.addColumn(linesCol);

         this.table.addColumn(new RatioColumn(Messages.getString("LOC_PER_FILE"), linesCol, filesCol));

         double cumulativePercent = 0;

         int otherLines = 0;

         int otherCount = 0;

         it = lines.iteratorSortedByValueReverse();

         while (it.hasNext()) {

             final String extension = (String) it.next();

             if (NO_EXTENSION.equals(extension) || NON_CODE_FILES.equals(extension)) {

                 continue;

             }

             if (cumulativePercent < 80 || this.table.getRowCount() < 10) {

                 typeCol.addValue("*." + extension);

                 filesCol.addValue(counts.get(extension));

                 linesCol.addValue(lines.get(extension));

                 cumulativePercent += lines.getPercent(extension);

             } else {

                 otherCount += counts.get(extension);

                 otherLines += lines.get(extension);

             }

         }

         counts.addInt(NO_EXTENSION, otherCount);

         lines.addInt(NO_EXTENSION, otherLines);

         if (counts.get(NO_EXTENSION) > 0) {

             typeCol.addValue("Others");

             filesCol.addValue(counts.get(NO_EXTENSION));

             linesCol.addValue(lines.get(NO_EXTENSION));

         }

         if (counts.get(NON_CODE_FILES) > 0) {

             typeCol.addValue("Non-Code Files");

             filesCol.addValue(counts.get(NON_CODE_FILES));

             linesCol.addValue(lines.get(NON_CODE_FILES));

         }

     }

     public Table getTable() {

         return this.table;

     }

     private String getExtension(final String fileName) {

         final Matcher m = extensionPattern.matcher(fileName);

         if (!m.matches()) {

             return NO_EXTENSION;

         }

         return m.group(1);

     }

 }