package application;

import java.util.List;
import javafx.concurrent.Task;
import javafx.fxml.FXML;
import javafx.scene.control.Button;
import javafx.scene.control.TextField;
import javafx.stage.Stage;

public class EditDistanceDialogController {
	private Stage dialogStage;
	private MainApp mainApp;
	
	
	@FXML
	private TextField word1;
	
	@FXML
	private TextField word2;
	
	@FXML
	private Button okButton;
 
	
	@FXML
	private void initialize() {
 okButton.setDefaultButton(true);
	}
	
	/**
 * Sets the stage of this dialog.
 * @param dialogStage
 */
 public void setDialogStage(Stage dialogStage) {
 this.dialogStage = dialogStage;
 }

 public void setField(String text) {
 word1.setText(text);
 }
 
 
 /**
 * Called when the user clicks ok.
 */
 @FXML
 private void handleOk() {
 if(isInputValid()) {
 		
 		Task<List<String>> task = new Task<List<String>>() {
 	 @Override
 	 public List<String> call() {
 	 	// get word path
 	 	LaunchClass launch = new LaunchClass();
 	 	spelling.WordPath wp = launch.getWordPath();
 	 		List<String> path = wp.findPath(word1.getText(), word2.getText());
 return path;
 	 }
 		};
 		
 		// stage for load dialog
 		final Stage loadStage = new Stage();
 		
 		// consume close request until task is finished
 		loadStage.setOnCloseRequest( e -> {
 			if(!task.isDone()) {
 				e.consume();
 			}
 		});

 		
 		// show loading dialog when task is running
 		task.setOnRunning( e -> {
 			dialogStage.close();
 			mainApp.showLoadStage(loadStage, "Finding word path...");
 		});
 		
 		// findPath done executing, close loading dialog, show results
 	 task.setOnSucceeded(e -> {
 	 	loadStage.close();
	 		mainApp.showEDResult(task.getValue());
 	 });
 	 
 	 Thread thread = new Thread(task);
 	 thread.start();
 		
 	}
 	else {
 		// display error pop-up
 		mainApp.showInputErrorDialog("You must input two words for Edit Distance.");
 	}
 
 }
 
 /**
 * Is called by the main application to give a reference back to itself.
 * 
 * 
 * @param mainApp
 */
	public void setMainApp(MainApp mainApp) {
		this.mainApp = mainApp;
	}
 
 @FXML
 private void handleCancel() {
 	dialogStage.close();
 }
 
 private boolean isInputValid() {
 	return !(word1.getText().equals("") || word2.getText().equals(""));
 }

}