package view;
import javafx.application.Application;
import javafx.beans.property.SimpleStringProperty;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.geometry.Insets;
import javafx.geometry.Orientation;
import javafx.scene.Group;
import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.ScrollBar;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.TextField;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.layout.VBox;
import javafx.scene.text.Font;
import javafx.stage.Stage;
public class UserListView extends Application {

    private TableView<Person> table = new TableView<Person>();
	private int start = 0, s = 0;
	private int step = 1;
    private final ObservableList<Person> data = FXCollections.observableArrayList();

           /* new Person("Jacob", "Smith", "jacob.smith@example.com"),
            new Person("Isabella", "Johnson", "isabella.johnson@example.com"),
            new Person("Ethan", "Williams", "ethan.williams@example.com"),
            new Person("Emma", "Jones", "emma.jones@example.com"),
            new Person("Michael", "Brown", "michael.brown@example.com"),
            new Person("Michael", "Brown", "michael.brown@example.com")

        );*/

    public static void main(String[] args) {
        launch(args);
    }
    private void populateInitialList() {
        data.add(new Person("Jacob", "Smith", "jacob.smith@example.com"));
        data.add(new Person("Isabella", "Johnson", "isabella.johnson@example.com"));
        data.add(new Person("Ethan", "Williams", "ethan.williams@example.com"));
        data.add(new Person("Emma", "Jones", "emma.jones@example.com"));
        data.add(new Person("Michael", "Brown", "michael.brown@example.com"));
        data.add(new Person("Emma", "Jones", "emma.jones@example.com"));
        data.add(new Person("Emma", "Jones", "emma.jones@example.com"));

  	}
    @Override
    public void start(Stage stage) {
        stage.setTitle("Table View Sample");
        stage.setWidth(450);
        stage.setHeight(200);

        final Label label = new Label("Address Book");
        label.setFont(new Font("Arial", 20));

        TableColumn<Person, String> firstNameCol = new TableColumn<Person, String>("First Name");
        firstNameCol.setMinWidth(100);
        firstNameCol.setCellValueFactory(
                new PropertyValueFactory<Person, String>("firstName"));

        TableColumn<Person, String> lastNameCol = new TableColumn<Person, String>("Last Name");
        lastNameCol.setMinWidth(100);
        lastNameCol.setCellValueFactory(
                new PropertyValueFactory<Person, String>("lastName"));

        TableColumn<Person, String> emailCol = new TableColumn<Person, String>("Email");
        emailCol.setMinWidth(200);
        emailCol.setCellValueFactory(
                new PropertyValueFactory<Person, String>("email"));
        populateInitialList();
        table.setItems(data);
        table.getColumns().addAll(firstNameCol, lastNameCol, emailCol);


        Scene scene = new Scene(table);

        stage.setScene(scene);
        stage.show();
        ScrollBar tableViewScrollBar = getTableViewScrollBar(table);
		tableViewScrollBar.valueProperty().addListener((observable, oldValue, newValue) -> {
			double position = newValue.doubleValue();
			ScrollBar scrollBar = getTableViewScrollBar(table);
			if (position == scrollBar.getMax()) {
				if (step <= 50) {
				      data.add(new Person("Emma", "Jones", "emma.jones@example.com"));
					//listItems.addAll(r);
					//System.out.println("start " + start + " " + "step " + step);
					start = step;
					step += 1;
					/*
					 * listItems.remove(0); listItems.remove(0);
					 * listItems.remove(0); listItems.remove(0); s+=4;
					 */
					scrollBar.decrement();
				}
			} else if (position == scrollBar.getMin()) {
				/*
				 * if(s > 0){ step = start; start -= 4; s -= 4; listItems.add(0,
				 * bigData.get(s)); listItems.add(1, bigData.get(s+1));
				 * listItems.add(2, bigData.get(s+2)); listItems.add(3,
				 * bigData.get(s+3)); listItems.remove(listItems.size()-1);
				 * listItems.remove(listItems.size()-1);
				 * listItems.remove(listItems.size()-1);
				 * listItems.remove(listItems.size()-1); scrollBar.increment();
				 * System.out.println("hiiii"); }
				 */
			}
		});
    }
    private ScrollBar getTableViewScrollBar(TableView<?> tab) {
		ScrollBar scrollbar = null;
		for (Node node : tab.lookupAll(".scroll-bar")) {
			if (node instanceof ScrollBar) {
				ScrollBar bar = (ScrollBar) node;
				if (bar.getOrientation().equals(Orientation.VERTICAL)) {
					scrollbar = bar;
				}
			}
		}
		return scrollbar;
	}


    public static class Person {

        private final SimpleStringProperty firstName;
        private final SimpleStringProperty lastName;
        private final SimpleStringProperty email;

        private Person(String fName, String lName, String email) {
            this.firstName = new SimpleStringProperty(fName);
            this.lastName = new SimpleStringProperty(lName);
            this.email = new SimpleStringProperty(email);
        }

        public String getFirstName() {
            return firstName.get();
        }

        public void setFirstName(String fName) {
            firstName.set(fName);
        }

        public String getLastName() {
            return lastName.get();
        }

        public void setLastName(String fName) {
            lastName.set(fName);
        }

        public String getEmail() {
            return email.get();
        }

        public void setEmail(String fName) {
            email.set(fName);
        }
    }
}