package com.simpleplugin;

import com.intellij.codeInsight.intention.impl.BaseIntentionAction;
import com.intellij.lang.ASTNode;
import com.intellij.openapi.application.ApplicationManager;
import com.intellij.openapi.command.WriteCommandAction;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.fileChooser.*;
import com.intellij.openapi.fileEditor.FileEditorManager;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.pom.Navigatable;
import com.intellij.psi.*;
import com.intellij.psi.search.*;
import com.intellij.util.IncorrectOperationException;
import com.intellij.util.indexing.FileBasedIndex;
import com.simpleplugin.psi.*;
import org.jetbrains.annotations.NotNull;

import java.util.Collection;

class CreatePropertyQuickFix extends BaseIntentionAction {
  private String key;

  CreatePropertyQuickFix(String key) {
    this.key = key;
  }

  @NotNull
  @Override
  public String getText() {
    return "Create property";
  }

  @NotNull
  @Override
  public String getFamilyName() {
    return "Simple properties";
  }

  @Override
  public boolean isAvailable(@NotNull Project project, Editor editor, PsiFile file) {
    return true;
  }

  @Override
  public void invoke(@NotNull final Project project, final Editor editor, PsiFile file) throws
      IncorrectOperationException {
    ApplicationManager.getApplication().invokeLater(new Runnable() {
      @Override
      public void run() {
        Collection<VirtualFile> virtualFiles =
            FileBasedIndex.getInstance().getContainingFiles(FileTypeIndex.NAME, SimpleFileType.INSTANCE,
                                                            GlobalSearchScope.allScope(project));
        if (virtualFiles.size() == 1) {
          createProperty(project, virtualFiles.iterator().next());
        } else {
          final FileChooserDescriptor descriptor =
              FileChooserDescriptorFactory.createSingleFileDescriptor(SimpleFileType.INSTANCE);
          descriptor.setRoots(project.getBaseDir());
          final VirtualFile file = FileChooser.chooseFile(descriptor, project, null);
          if (file != null) {
            createProperty(project, file);
          }
        }
      }
    });
  }

  private void createProperty(final Project project, final VirtualFile file) {
    new WriteCommandAction.Simple(project) {
      @Override
      public void run() {
        SimpleFile simpleFile = (SimpleFile) PsiManager.getInstance(project).findFile(file);
        ASTNode lastChildNode = simpleFile.getNode().getLastChildNode();
        if (lastChildNode != null && !lastChildNode.getElementType().equals(SimpleTypes.CRLF)) {
          simpleFile.getNode().addChild(SimpleElementFactory.createCRLF(project).getNode());
        }
        // IMPORTANT: change spaces to escaped spaces or the new node will only have the first word for the key
        SimpleProperty property = SimpleElementFactory.createProperty(project, key.replaceAll(" ", "\\\\ "), "");
        simpleFile.getNode().addChild(property.getNode());
        ((Navigatable) property.getLastChild().getNavigationElement()).navigate(true);
        FileEditorManager.getInstance(project).getSelectedTextEditor().getCaretModel().
            moveCaretRelatively(2, 0, false, false, false);

        // almost the same thing but manipulating plain text of the document instead of PSI
//                FileEditorManager.getInstance(project).openFile(file, true);
//                final Editor editor = FileEditorManager.getInstance(project).getSelectedTextEditor();
//                final Document document = editor.getDocument();
//                document.insertString(document.getTextLength(), "\n" + key.replaceAll(" ", "\\\\ ") + " = ");
//                editor.getCaretModel().getPrimaryCaret().moveToOffset(document.getTextLength());
      }
    }.execute();
  }
}