package net.sourceforge.phpeclipse.wiki.builder;

import java.io.IOException;
import java.util.Map;

import net.sourceforge.phpeclipse.wiki.editor.WikiEditorPlugin;
import net.sourceforge.phpeclipse.wiki.export.html.WikiHTMLExporter;
import net.sourceforge.phpeclipse.wiki.preferences.Util;

import org.eclipse.core.internal.resources.Folder;
import org.eclipse.core.resources.ICommand;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IFolder;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IResourceDelta;
import org.eclipse.core.resources.IResourceDeltaVisitor;
import org.eclipse.core.resources.IncrementalProjectBuilder;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.core.runtime.Path;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.PlatformUI;

public class WikiBuilder extends IncrementalProjectBuilder {

  class WikiVisitor implements IResourceDeltaVisitor {
    String fBinBasePath;

    String fSrcBasePath;

    public WikiVisitor(String binBasePath, String srcBasePath) {
      fBinBasePath = binBasePath;
      fSrcBasePath = srcBasePath;
    }

    public boolean visit(IResourceDelta delta) {
      IResource resource = delta.getResource();
      if (DEBUG) {
        System.out.println(resource.toString());
      }
      if (delta.getKind() == IResourceDelta.REMOVED && resource.getType() == IResource.FILE) {
        // remove this file from the wiki publishing directory
        String htmlName = Util.getHTMLFileName((IFile) resource, fBinBasePath, fSrcBasePath);
        if (htmlName != null) {
          java.io.File file = new java.io.File(htmlName);
          if (file.exists()) {
            file.delete();
          }
        }
        return true;
      }
      //only interested in changed resources at this point (not added or removed)
      if (delta.getKind() != IResourceDelta.CHANGED)
        return true;
      //only interested in content changes
      if ((delta.getFlags() & IResourceDelta.CONTENT) == 0)
        return true;
      if (resource.getType() == IResource.FILE) {
        CreatePageAction.createPage((IFile) resource);
      }
      return true;
    }
  }

  public static final String BUILDER_ID = "net.sourceforge.phpeclipse.wiki.wikibuilder";

  private static final boolean DEBUG = false;

  private IProject fProject;

  private IWorkbench workbench;

  public WikiBuilder() {
    workbench = PlatformUI.getWorkbench();
    fProject = null;
  }

  protected IProject[] build(int kind, Map args, IProgressMonitor _monitor) {
    try {
      fProject = getProject();
      ICommand[] commands = fProject.getDescription().getBuildSpec();
      boolean found = false;
      for (int i = 0; i < commands.length; i++) {
        if (commands[i].getBuilderName().equals(BUILDER_ID)) {
          found = true;
          break;
        }
      }
      // fProject.hasNature()
      if (found && fProject != null && fProject.isAccessible()) {

        if (_monitor == null)
          _monitor = new NullProgressMonitor();
        switch (kind) {
        case INCREMENTAL_BUILD:
          if (DEBUG) {
            System.out.println("INCREMENTAL_BUILD requested");
          }
          incrementalBuild();
          break;
        // we don't need auto build, because on every save we create a new *.html file ?
        case AUTO_BUILD:
          if (DEBUG) {
            System.out.println("AUTO_BUILD requested");
          }
          incrementalBuild();
          break;
        case FULL_BUILD:
          if (DEBUG) {
            System.out.println("FULL_BUILD requested");
          }
          fullBuild(_monitor);
          break;
        default:
        // unknown build kind requested;
        }
        //        fProject.refreshLocal(1,_monitor);
      }
    } catch (Exception x) {

    }
    return new IProject[0];
  }

  private void fullBuild(IProgressMonitor monitor) throws CoreException, IOException {
    try {
      WikiHTMLExporter wikiExporter = new WikiHTMLExporter();
      String srcBasePath = Util.getProjectsWikiTextsPath(fProject);
      String basePath = Util.getProjectsWikiOutputPath(fProject, WikiEditorPlugin.HTML_OUTPUT_PATH);
      wikiExporter.export(fProject, basePath, srcBasePath, monitor);
    } catch (IOException e) {
      e.printStackTrace();
    } catch (CoreException e) {
      e.printStackTrace();
    } catch (InstantiationException e) {
      e.printStackTrace();
    } catch (IllegalAccessException e) {
      e.printStackTrace();
    } catch (ClassNotFoundException e) {
      e.printStackTrace();
    }
  }

  private void incrementalBuild() throws CoreException, IOException {
    IResourceDelta delta = getDelta(fProject);
    String srcBasePath = Util.getProjectsWikiTextsPath(fProject);
    String basePath = Util.getProjectsWikiOutputPath(fProject, WikiEditorPlugin.HTML_OUTPUT_PATH);
    IResourceDeltaVisitor visitor = new WikiVisitor(basePath, srcBasePath);
    if (delta != null)
      delta.accept(visitor);
  }

}