package bluej.utility;

import bluej.Config;
import bluej.utility.javafx.JavaFXUtil;

import javafx.collections.FXCollections;
import javafx.scene.control.Button;
import javafx.scene.control.ButtonType;
import javafx.scene.control.Dialog;
import javafx.scene.control.Label;
import javafx.scene.control.ListCell;
import javafx.scene.control.ListView;
import javafx.scene.control.SelectionMode;
import javafx.scene.control.cell.TextFieldListCell;
import javafx.scene.input.MouseButton;
import javafx.scene.layout.VBox;
import javafx.stage.Modality;
import javafx.stage.Window;
import javafx.util.StringConverter;

import threadchecker.OnThread;
import threadchecker.Tag;

import java.io.File;
import java.util.List;




| A dialog shown when the user was asked to select a project to open, but did not
| select a directory to open.
|
@OnThread(Tag.FXPlatform)
class NotAProjectDialog
{       
private static final ButtonType OPEN_BUTTON = ButtonType.NEXT;
   
   private final ListView<File> subDirList;

   
   private static enum Choice { CANCEL, CHOOSE_AGAIN, SELECTED_FILE 
   }
   
private static class ChoiceAndFile
{           
private final Choice choice;
       
   private final File file; 

       
   public ChoiceAndFile(Choice choice, File file)
       {            
      this.choice = choice;
           
      this.file = file;         
      }     
   }

   
private final Dialog<ChoiceAndFile> dialog;
   
private ChoiceAndFile selected;

   
public NotAProjectDialog(Window parent, File original, List<File> possibilities)
   {        
   this.dialog = new Dialog<>();
   dialog.initOwner(parent);
   dialog.initModality(Modality.WINDOW_MODAL);
   final String labelRoot = "notAProject." + (Config.isGreenfoot() ? "greenfoot" : "bluej");
   dialog.setTitle(Config.getString(labelRoot + ".title"));
   dialog.getDialogPane().getButtonTypes().setAll(ButtonType.CANCEL, ButtonType.OK);
   Config.addDialogStylesheets(dialog.getDialogPane());
       
   VBox content = new VBox(new Label(Config.getString(labelRoot + ".message") + "\n    " + original.getAbsolutePath()));
   JavaFXUtil.addStyleClass(content, "not-a-project");
   content.setFillWidth(true);
   if (possibilities != null && !possibilities.isEmpty())
       {
      dialog.getDialogPane().getButtonTypes().add(OPEN_BUTTON);
      Button openButton = (Button) dialog.getDialogPane().lookupButton(OPEN_BUTTON);
      openButton.setText(Config.getString(labelRoot + ".subDirButton"));
           
      content.getChildren().add(new Label(Config.getString(labelRoot + ".subDirs")));
           
      subDirList = new ListView<>(FXCollections.observableArrayList(possibilities));
      subDirList.getSelectionModel().setSelectionMode(SelectionMode.SINGLE);
      subDirList.setEditable(false);
      subDirList.setCellFactory(v -> {
               
      ListCell<File> cell = new TextFieldListCell<>(new StringConverter<File>()
               {                    
         @Override
                   
         public String toString(File object)
                   {
            return object.getAbsolutePath();                     
            }

                   
         @Override
                   
         public File fromString(String string)
                   {                        
            throw new UnsupportedOperationException();                     
            }                 
         });
      cell.setOnMouseClicked(e -> {
      if (e.getClickCount() == 2 && e.getButton() == MouseButton.PRIMARY)
                   {
         subDirList.getSelectionModel().select(cell.getItem());
         openButton.fire();                     
         }                 
      });
   return cell;             
   });

subDirList.prefHeightProperty().set(possibilities.size() * 26 + 20);

subDirList.setMaxHeight(300.0);
openButton.disableProperty().bind(subDirList.getSelectionModel().selectedItemProperty().isNull());
JavaFXUtil.addStyleClass(subDirList, "subDirs");
content.getChildren().add(subDirList);         
}
       

else{ subDirList = null;
   }
((Button)dialog.getDialogPane().lookupButton(ButtonType.OK)).setText(Config.getString(labelRoot + ".button"));
dialog.getDialogPane().setContent(content);

dialog.setResultConverter(button -> {
if (button == ButtonType.OK)
               
return new ChoiceAndFile(Choice.CHOOSE_AGAIN, null);


else if (button == OPEN_BUTTON)
               
return new ChoiceAndFile(Choice.SELECTED_FILE, subDirList.getSelectionModel().getSelectedItem());
else if (button == ButtonType.CANCEL)
               
return new ChoiceAndFile(Choice.CANCEL, null);
           
else{ return selected;
   }         
});
}

   
public void showAndWait()
   {        
   this.selected = dialog.showAndWait().orElse(new ChoiceAndFile(Choice.CANCEL, null));     
   }

   
public boolean isCancel()
   {        
   return selected.choice == Choice.CANCEL;     
   }

   
public boolean isChooseAgain()
   {        
   return selected.choice == Choice.CHOOSE_AGAIN;     
   }

   
public File getSelectedDir()
   {        
   return selected.file;     
   } 
}