package net.sourceforge.phpeclipse.wiki.actions.mediawiki;

import java.io.ByteArrayInputStream;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import net.sourceforge.phpeclipse.wiki.editor.WikiEditor;
import net.sourceforge.phpeclipse.wiki.editor.WikiEditorPlugin;
import net.sourceforge.phpeclipse.wiki.internal.Configuration;
import net.sourceforge.phpeclipse.wiki.internal.ConfigurationManager;
import net.sourceforge.phpeclipse.wiki.internal.IConfiguration;
import net.sourceforge.phpeclipse.wiki.preferences.Util;
import net.sourceforge.phpeclipse.wiki.sql.WikipediaDB;
import net.sourceforge.phpeclipse.wiki.velocity.EditorText;

import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.Velocity;
import org.eclipse.core.resources.IContainer;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IFolder;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IResourceStatus;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.SubProgressMonitor;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.ITextSelection;
import org.eclipse.jface.text.TextSelection;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.window.Window;
import org.eclipse.ui.IEditorActionDelegate;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IFileEditorInput;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.dialogs.ListSelectionDialog;
import org.eclipse.ui.internal.dialogs.ListContentProvider;
import org.eclipse.ui.internal.ide.IDEWorkbenchPlugin;
import org.eclipse.ui.texteditor.AbstractTextEditor;

public class LoadWikipediaSQLAction implements IEditorActionDelegate {

  private AbstractTextEditor fEditor;

  private EditorText text;

  private IWorkbenchWindow window;

  private void createFolder(IFolder folderHandle, IProgressMonitor monitor) throws CoreException {
    try {
      // Create the folder resource in the workspace
      // Recursive to create any folders which do not exist already
      if (!folderHandle.exists()) {
        IContainer parent = folderHandle.getParent();
        if (parent instanceof IFolder && (!((IFolder) parent).exists())) {
          createFolder((IFolder) parent, monitor);
        }
        folderHandle.create(false, true, monitor);
      }
    } catch (CoreException e) {
      // If the folder already existed locally, just refresh to get contents
      if (e.getStatus().getCode() == IResourceStatus.PATH_OCCUPIED)
        folderHandle.refreshLocal(IResource.DEPTH_INFINITE, new SubProgressMonitor(monitor, 500));
      else
        throw e;
    }
  }

  /**
   * Creates a folder resource handle for the folder with the given workspace path. This method does not create the folder resource;
   * this is the responsibility of <code>createFolder</code>.
   * 
   * @param folderPath
   *          the path of the folder resource to create a handle for
   * @return the new folder resource handle
   * @see #createFolder
   */
  private IFolder createFolderHandle(IPath folderPath) {
    return IDEWorkbenchPlugin.getPluginWorkspace().getRoot().getFolder(folderPath);
  }

  private void createNewFileIfNeeded(IFile file, String word) throws CoreException {
    if (!file.exists()) {
      createWikiFile(file, word);
    }
  }

  private void createWikiFile(IFile file, String word) throws CoreException {
    IContainer parent = file.getParent();
    if (parent instanceof IFolder && (!((IFolder) parent).exists())) {
      createFolder((IFolder) parent, null);
    }
    String newText = "<!--" + word + "-->";
    byte[] buffer = newText.getBytes();
    ByteArrayInputStream source = new ByteArrayInputStream(buffer);
    file.create(source, true, null);
  }

  public void dispose() {
  }

  protected Configuration getConfiguration() {
    List allConfigsList = ConfigurationManager.getInstance().getConfigurations();
    ArrayList configsList = new ArrayList();
    for (int i = 0; i < allConfigsList.size(); i++) {
      IConfiguration temp = (IConfiguration) allConfigsList.get(i);
      if (temp.getType().equals(WikiEditorPlugin.WIKIPEDIA_SQL)) {
        configsList.add(temp);
      }
    }
    Collections.sort(configsList);
    Configuration configuration = null;
    ListSelectionDialog listSelectionDialog = new ListSelectionDialog(WikiEditorPlugin.getDefault().getWorkbench()
        .getActiveWorkbenchWindow().getShell(), configsList, new ListContentProvider(), new LabelProvider(),
        "Select the refresh URL.");
    listSelectionDialog.setTitle("Multiple active configuration found");
    if (listSelectionDialog.open() == Window.OK) {
      Object[] locations = listSelectionDialog.getResult();
      if (locations != null) {
        for (int i = 0; i < locations.length; i++) {
          configuration = (Configuration) locations[i];
          break;
        }
      }
    }
    return configuration;
  }

  public IDocument getDocument() {
    IDocument doc = fEditor.getDocumentProvider().getDocument(fEditor.getEditorInput());
    return doc;
  }

  private String getWikiFile(IFile file) {
    return Util.getFileWikiName(file);
  }

  public void init(IWorkbenchWindow window) {
    this.window = window;
  }

  void openWikiFile(IFile cfile) {
    String wikiName = getWikiFile(cfile);
    try {
      if (fEditor != null) {
        selectWiki(wikiName);
      }
    } catch (Exception e) {
    }

  }

  public void openWikiLinkOnSelection() {
    IDocument doc = getDocument();
    ITextSelection selection = (ITextSelection) fEditor.getSelectionProvider().getSelection();
    int pos = selection.getOffset();
    IFileEditorInput ei = (IFileEditorInput) fEditor.getEditorInput();
    openWikiFile(ei.getFile());
  }

  public void run(IAction action) {
    if (fEditor == null) {
      IEditorPart targetEditor = window.getActivePage().getActiveEditor();
      if (targetEditor != null && (targetEditor instanceof AbstractTextEditor)) {
        fEditor = (AbstractTextEditor) targetEditor;
      }
    }
    if (fEditor != null) {
      openWikiLinkOnSelection();
    }
  }

  public void selectionChanged(IAction action, ISelection selection) {
    if (selection.isEmpty()) {
      return;
    }
    if (selection instanceof TextSelection) {
      action.setEnabled(true);
      return;
    }
    if (window.getActivePage() != null && window.getActivePage().getActivePart() != null) {
      action.setEnabled(window.getActivePage().getActivePart().getClass().equals(WikiEditor.class));
    }
  }

  private void selectWiki(String wikiName) {
    String wikiContent = WikipediaDB.getExactText(wikiName);
    if (wikiContent != null) {
      IDocument doc = fEditor.getDocumentProvider().getDocument(fEditor.getEditorInput());
      doc.set(wikiContent);
    }
  }

  public void setActiveEditor(IAction action, IEditorPart targetEditor) {
    if (targetEditor != null && (targetEditor instanceof AbstractTextEditor)) {
      fEditor = (AbstractTextEditor) targetEditor;
      text = new EditorText(targetEditor);
    }
  }
}