import javafx.collections.FXCollections;
import javafx.geometry.*;
import javafx.geometry.Insets;
import javafx.scene.control.*;
import javafx.scene.control.Button;
import javafx.scene.layout.GridPane;

public class EmailBuddyPanel extends GridPane {
    private EmailBuddyList	model;	// This is the list of buddies

    // The components on the window
    private ListView<EmailBuddy>    buddyList;
    private Button                  addButton;
    private Button                  removeButton;
    private CheckBox                hotListButton;

    public ListView<EmailBuddy>    getBuddyList() { return buddyList; }
    public Button                  getAddButton() { return addButton; }
    public Button                  getRemoveButton() { return removeButton; }
    public CheckBox                getHotListButton() { return hotListButton; }


    public EmailBuddyPanel(EmailBuddyList m) {
        model = m;	// Store the model so that he update() method can access it

        setPadding(new Insets(10, 10, 10, 10));

        buddyList = new ListView<EmailBuddy>();
        //EmailBuddy[] names = {"Stan Dupp", "April Rain", "Patty O' Lantern", "Robin Banks", "Sandy Beach"};
        buddyList.setItems(FXCollections.observableArrayList(m.getEmailBuddies()));
        add(buddyList,0,0,1,3);  // spans 1 column, 3 rows
        buddyList.setPrefHeight(Integer.MAX_VALUE);
        buddyList.setMinWidth(200);
        buddyList.setPrefWidth(Integer.MAX_VALUE);

        addButton = new Button("Add");
        add(addButton,1,0);
        setMargin(addButton, new Insets(0, 0, 10, 10));
        setValignment(addButton, VPos.TOP);
        setHalignment(addButton, HPos.CENTER);
        addButton.setMinHeight(25);
        addButton.setMinWidth(100);

        removeButton = new Button("Remove");
        add(removeButton,1,1);
        setMargin(removeButton, new Insets(0, 0, 10, 10));
        setValignment(removeButton, VPos.TOP);
        setHalignment(removeButton, HPos.CENTER);
        removeButton.setMinHeight(25);
        removeButton.setMinWidth(100);

        hotListButton = new CheckBox("Show Hot List");
        add(hotListButton,1,2);
        setMargin(hotListButton, new Insets(0, 0, 10, 10));
        setValignment(hotListButton, VPos.TOP);
        setHalignment(hotListButton, HPos.CENTER);
        hotListButton.setMinHeight(25);
        hotListButton.setMinWidth(100);

        // Now update the components by filling them in
        update();
    }

    // Update the components so that they reflect the contents of the model
    public void update() {
        // Remember what was selected
        int selectedItem = buddyList.getSelectionModel().getSelectedIndex();

        // Now re-populate the list by creating and returning a new
        // array with the exact size of the number of items in it.
        EmailBuddy[]  exactList;
        if (hotListButton.isSelected()) {
            exactList = new EmailBuddy[model.getHotListSize()];
            for (int i = 0; i < model.getHotListSize(); i++)
                exactList[i] = model.getHotListBuddy(i);
        }
        else {
            exactList = new EmailBuddy[model.getSize()];
            for (int i=0; i<model.getSize(); i++)
                exactList[i] = model.getBuddy(i);
        }
        buddyList.setItems(null);  /// Seems to be required for a proper update
        buddyList.setItems(FXCollections.observableArrayList(exactList));

        // Reselect the selected item
        buddyList.getSelectionModel().select(selectedItem);

        // Enable/disable the Remove button accordingly
        removeButton.setDisable(buddyList.getSelectionModel().getSelectedIndex() < 0);
    }
}