package com.baeldung.intellij.stackoverflowplugin;

import com.intellij.ide.BrowserUtil;
import com.intellij.lang.Language;
import com.intellij.openapi.actionSystem.ActionManager;
import com.intellij.openapi.actionSystem.AnAction;
import com.intellij.openapi.actionSystem.AnActionEvent;
import com.intellij.openapi.actionSystem.CommonDataKeys;
import com.intellij.openapi.editor.CaretModel;
import com.intellij.openapi.editor.Editor;
import com.intellij.psi.PsiFile;

public class SearchAction extends AnAction
{
   /**
    * Convert selected text to a URL friendly string.
    * @param e
    */
   @Override
   public void actionPerformed(AnActionEvent e)
   {
      final Editor editor = e.getRequiredData(CommonDataKeys.EDITOR);
      CaretModel caretModel = editor.getCaretModel();

      // For searches from the editor, we should also get file type information
      // to help add scope to the search using the Stack overflow search syntax.
      //
      // https://stackoverflow.com/help/searching

      String languageTag = "";
      PsiFile file = e.getData(CommonDataKeys.PSI_FILE);
      if(file != null)
      {
         Language lang = e.getData(CommonDataKeys.PSI_FILE).getLanguage();
         languageTag = "+[" + lang.getDisplayName().toLowerCase() + "]";
      }

      // The update method below is only called periodically so need
      // to be careful to check for selected text
      if(caretModel.getCurrentCaret().hasSelection())
      {
         String query = caretModel.getCurrentCaret().getSelectedText().replace(' ', '+') + languageTag;
         BrowserUtil.browse("https://stackoverflow.com/search?q=" + query);
      }
   }

   /**
    * Only make this action visible when text is selected.
    * @param e
    */
   @Override
   public void update(AnActionEvent e)
   {
      final Editor editor = e.getRequiredData(CommonDataKeys.EDITOR);
      CaretModel caretModel = editor.getCaretModel();
      e.getPresentation().setEnabledAndVisible(caretModel.getCurrentCaret().hasSelection());
   }
}