import static java.nio.file.FileVisitResult.CONTINUE;

import java.io.IOException;
import java.nio.file.FileVisitResult;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.attribute.BasicFileAttributes;
import java.util.Vector;

public class FileTreeCreatorVC7 extends FileTreeCreator {

   public FileTreeCreatorVC7(Path startDir, Vector<BuildConfig> allConfigs,
         WinGammaPlatform wg) {
      super(startDir, allConfigs, null);
   }

   @Override
   public FileVisitResult visitFile(Path file, BasicFileAttributes attr) {
      DirAttributes currentFileAttr = attributes.peek().clone();
      boolean usePch = false;
      boolean disablePch = false;
      boolean useIgnore = false;
      String fileName = file.getFileName().toString();

      // usePch applies to all configs for a file.
      if (fileName.equals(BuildConfig.getFieldString(null, "UseToGeneratePch"))) {
         usePch = true;
      }

      for (BuildConfig cfg : allConfigs) {
         if (cfg.lookupHashFieldInContext("IgnoreFile", fileName) != null) {
            useIgnore = true;
            currentFileAttr.setIgnore(cfg);
         } else if (cfg.matchesIgnoredPath(file.toAbsolutePath().toString())) {
            useIgnore = true;
            currentFileAttr.setIgnore(cfg);
         }

         if (cfg.lookupHashFieldInContext("DisablePch", fileName) != null) {
            disablePch = true;
            currentFileAttr.setDisablePch(cfg);
         }

         Vector<String> rv = new Vector<String>();
         cfg.collectRelevantVectors(rv, "AdditionalFile");
         for (String addFile : rv) {
            if (addFile.equals(fileName)) {
               // supress any ignore
               currentFileAttr.removeFromIgnored(cfg);
            }
         }
      }

      if (!useIgnore && !disablePch && !usePch) {
         wg.tag("File", new String[] { "RelativePath",
               vcProjLocation.relativize(file).toString() });
      } else {
         wg.startTag("File", new String[] { "RelativePath",
               vcProjLocation.relativize(file).toString() });

         for (BuildConfig cfg : allConfigs) {
            boolean ignore = currentFileAttr.hasIgnore(cfg);
            String[] fileConfAttr;

            if (ignore) {
               fileConfAttr = new String[] { "Name", cfg.get("Name"),
                     "ExcludedFromBuild", "TRUE" };
            } else {
               fileConfAttr = new String[] { "Name", cfg.get("Name") };
            }

            if (!disablePch && !usePch && !ignore) {
               continue;
            } else if (!disablePch && !usePch) {
               wg.tag("FileConfiguration", fileConfAttr);
            } else {
               wg.startTag("FileConfiguration", fileConfAttr);
               if (usePch) {
                  // usePch always applies to all configs, might not always be
                  // so.
                  wg.tag("Tool", new String[] { "Name", "VCCLCompilerTool",
                        "UsePrecompiledHeader", "1" });
                  assert (!disablePch);
               }
               if (disablePch) {
                  if (currentFileAttr.hasDisablePch(cfg)) {
                     wg.tag("Tool", new String[] { "Name", "VCCLCompilerTool",
                           "UsePrecompiledHeader", "0" });
                  }
                  assert (!usePch);
               }
               wg.endTag();
            }
         }
         wg.endTag();
      }

      return CONTINUE;
   }

   @Override
   public FileVisitResult preVisitDirectory(Path path, BasicFileAttributes attrs)
         throws IOException {
      Boolean hide = false;
      DirAttributes newAttr = attributes.peek().clone();

      String rPath;
      if (path.toAbsolutePath().toString()
            .equals(this.startDir.toAbsolutePath().toString())) {
         rPath = startDir.toString();
      } else {
         rPath = path.getFileName().toString();
      }

      // check per config ignorePaths!
      for (BuildConfig cfg : allConfigs) {
         if (cfg.matchesIgnoredPath(path.toAbsolutePath().toString())) {
            newAttr.setIgnore(cfg);
         }

         // Hide is always on all configs. And additional files are never
         // hiddden
         if (cfg.matchesHidePath(path.toAbsolutePath().toString())) {
            hide = true;
            break;
         }
      }

      if (!hide) {
         wg.startTag("Filter", new String[] { "Name", rPath });

         attributes.push(newAttr);
         return super.preVisitDirectory(path, attrs);
      } else {
         return FileVisitResult.SKIP_SUBTREE;
      }
   }

   @Override
   public FileVisitResult postVisitDirectory(Path dir, IOException exc) {
      // end matching attributes set by ignorepath
      wg.endTag();
      attributes.pop();

      return CONTINUE;
   }

   @Override
   public FileVisitResult visitFileFailed(Path file, IOException exc) {
      return CONTINUE;
   }

   public void writeFileTree() throws IOException {
      Files.walkFileTree(this.startDir, this);
   }
}