package no.ntnu.idatt1002.demo.controller;

import java.io.IOException;
import java.time.LocalDate;
import java.util.Optional;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.scene.Node;
import javafx.scene.control.Alert;
import javafx.scene.control.Alert.AlertType;
import javafx.scene.control.Button;
import javafx.scene.control.ButtonType;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.stage.Stage;
import no.ntnu.idatt1002.demo.data.Budget.FileHandlingBudget;
import no.ntnu.idatt1002.demo.data.Budget.FileHandlingSelectedBudget;
import no.ntnu.idatt1002.demo.data.Economics.Expense;

public class CreateBudgetController {

  public Button okBtn;
  public Button cancelBtn;
  private String currentMonth;

  private Expense expense;

  private String budgetName;

  @FXML
  private TextField nameField;

  @FXML
  private Label errorMsg;


  @FXML
  public void initialize() {
    currentMonth = String.valueOf(LocalDate.now().getMonth());
    okBtn.addEventFilter(
        ActionEvent.ACTION, event -> {
          if(nameField.getText().equals("")) {
            errorMsg.setOpacity(1);
            event.consume();
          }
        });
    okBtn.addEventFilter(
        ActionEvent.ACTION, event -> {
          //if(hasDuplicate() { //TODO MAYBE THIS IN THE START BUDGET FILE
            //errorMsg.setText("Budget for this month already exist")
        }
    );
  }
  @FXML
  public void pressOkBtn(ActionEvent event) {
    String title = "Confirm name";
    String header = "Are you sure you to use this name?";
    String content = "The name cannot be changed later";

    budgetName = nameField.getText();
    System.out.println(budgetName);

    if(!createNewFiles(budgetName)) {
      updateCurrentFile("", "");
      errorMsg.setText("A budget of the same \nname already exists");
      errorMsg.setOpacity(1);
      return;
    }

    Optional<ButtonType> isConfirmed = showConfirmationDialog(title, header, content);
    if (isConfirmed.isPresent() && isConfirmed.get() == ButtonType.OK) {
      updateCurrentFile(currentMonth, budgetName);
    } else {
      updateCurrentFile("", "");
    }

    final Node source = (Node) event.getSource();
    ((Stage) source.getScene().getWindow()).close();
  }

  @FXML
  public void pressCancelBtn(ActionEvent event) {
    updateCurrentFile("", "");
    final Node source = (Node) event.getSource();
    ((Stage) source.getScene().getWindow()).close();
  }

  /**
   * Returns an optional, which is a popup alert box, asking for confirmation for deleting an entry.
   * @return An alert box, asking for confirmation for deleting the selected entry of the tableview.
   */
  @FXML
  private Optional<ButtonType> showConfirmationDialog(String title, String header, String content) {
    Alert alert = new Alert(Alert.AlertType.CONFIRMATION);
    alert.setTitle(title);
    alert.setHeaderText(header);
    alert.setContentText(content);

    return alert.showAndWait();
  }

  private void showErrorMsgBox(String title, String header, String content) {
    Alert alert = new Alert(AlertType.ERROR);
    alert.setTitle(title);
    alert.setHeaderText(header);
    alert.setContentText(content);

    alert.showAndWait();
  }

  public boolean createNewFiles(String budgetName) {
    boolean empty;
    try {
      empty = FileHandlingSelectedBudget.createBudgetDirectory(currentMonth + budgetName);
      FileHandlingSelectedBudget.createNewIncomeFile(currentMonth + budgetName, "Income");
      FileHandlingSelectedBudget.createNewExpenseFile(currentMonth + budgetName, "Expense");
      FileHandlingSelectedBudget.createNewBudgetFile(currentMonth + budgetName, "Budget");
    } catch (IOException ioe) {
      empty = false;
      System.out.println(ioe.getMessage());
      ioe.printStackTrace();
      showErrorMsgBox(ioe.getMessage(), ioe.getMessage(), ioe.getMessage());
    }
    return empty;
  }

  public void updateCurrentFile(String currentMonth, String budgetName) {
    try {
      FileHandlingSelectedBudget.updateSelectedBudget(currentMonth + budgetName);
    } catch (IOException ioe) {
      showErrorMsgBox(ioe.getMessage(), ioe.getMessage(), ioe.getMessage());
    }
  }
}