package ui.view;

import java.io.File;
import java.util.ArrayList;
import java.util.Enumeration;

import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JMenuBar;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JTree;
import javax.swing.BoxLayout;
import javax.swing.JSplitPane;
import javax.swing.JScrollPane;
import javax.swing.JTabbedPane;
import javax.swing.JTable;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.MutableTreeNode;
import javax.swing.tree.TreeNode;

import ui.controller.Control;
import ui.model.*;

import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.JEditorPane;
import javax.swing.JFileChooser;
import javax.swing.table.DefaultTableModel;

import java.awt.Color;
import java.awt.Cursor;
import java.awt.Image;
import java.awt.Point;
import java.awt.Toolkit;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.DataFlavor;
import java.awt.dnd.DragSource;
import java.awt.BorderLayout;

import javax.swing.JPanel;
import javax.swing.JToolBar;
import javax.swing.JButton;
import javax.swing.TransferHandler;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.JComboBox;
import javax.swing.DefaultComboBoxModel;
import javax.swing.Icon;
import javax.swing.ImageIcon;

import classes.Category;
import classes.CpsObject;
import classes.HolonObject;
import Interfaces.CategoryListener;

import java.awt.event.ActionListener;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.ActionEvent;

public class GUI implements CategoryListener {

	private JFrame frmCyberPhysical;

	private final JMenuBar menuBar = new JMenuBar();
	private final JMenu mnNewMenu = new JMenu("File");
	private final JMenu mnNewMenu_1 = new JMenu("Edit");
	private final JMenu mnNewMenu_2 = new JMenu("Options");
	private final JMenu mnNewMenu_3 = new JMenu("View");
	private final JMenu mnHelp = new JMenu("Help");
	private final JMenuItem mntmOpen = new JMenuItem("Open");
	private final JMenuItem mntmNew = new JMenuItem("New");
	private final JMenuItem mntmSave = new JMenuItem("Save");
	private final JSplitPane splitPane = new JSplitPane();
	private final JSplitPane splitPane_1 = new JSplitPane();
	private final JScrollPane scrollPane_1 = new JScrollPane();
	private final JTabbedPane tabbedPane = new JTabbedPane(JTabbedPane.TOP);
	private final JScrollPane scrollPane_2 = new JScrollPane();

	private final JTree tree = new JTree();
	private final JEditorPane dtrpnHereWillBe = new JEditorPane();
	private final JSplitPane splitPane_2 = new JSplitPane(JSplitPane.VERTICAL_SPLIT);

	private JTable table;
	private JTable table_2 = new JTable();
	private final Model model;
	private final Control controller;
	private AddObjectPopUp addObjectPopUP;

	private final JPanel panel = new JPanel();
	private final JComboBox comboBox = new JComboBox();

	// Buttons
	private final JButton btnAdd = new JButton("+");
	private final JButton btnDel = new JButton("-");

	private final JToolBar toolBar = new JToolBar();

	// variables
	boolean dragging = false;
	String actualObjectClicked;

	private final MyCanvas canvas;

	/**
	 * Create the application.
	 */
	public GUI(Control control) {
		this.controller = control;
		this.model = control.getModel();
		this.canvas = new MyCanvas(model);
		control.initListener(this);
		initialize();
	}

	/**
	 * Initialize the contents of the frame.
	 */
	@SuppressWarnings("serial")
	private void initialize() {
		frmCyberPhysical = new JFrame();
		frmCyberPhysical.setTitle("Cyber Physical Systems Model");
		frmCyberPhysical.setBounds(100, 100, 891, 467);
		frmCyberPhysical.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		frmCyberPhysical.setJMenuBar(menuBar);

		menuBar.add(mnNewMenu);

		mnNewMenu.add(mntmNew);

		mnNewMenu.add(mntmOpen);

		mnNewMenu.add(mntmSave);

		menuBar.add(mnNewMenu_1);

		menuBar.add(mnNewMenu_2);

		menuBar.add(mnNewMenu_3);

		menuBar.add(mnHelp);

		// Table
		String[] columnNames = { "Gadget", "Consumption", "Quantity" };

		Object[][] data = { { "TV", "20", "1" }, { "PC", "30", "2" }, { "Fridge", "40", "1" } };

		splitPane.setRightComponent(splitPane_1);
		splitPane.setDividerLocation(200);
		splitPane_1.setDividerLocation(500);
		canvas.setBackground(Color.WHITE);

		tabbedPane.addTab("Modeling", null, canvas, null);
		tabbedPane.addTab("Simulation", null, scrollPane_2, null);
		dtrpnHereWillBe.setText("Here will be the Simulation");

		scrollPane_2.setViewportView(dtrpnHereWillBe);

		splitPane_1.setLeftComponent(tabbedPane);

		JScrollPane scrollPane = new JScrollPane();
		splitPane_1.setRightComponent(splitPane_2);
		splitPane_2.setLeftComponent(scrollPane);
		table = new JTable(data, columnNames);
		scrollPane.setViewportView(table);

		table.setFillsViewportHeight(true);
		table.setModel(new DefaultTableModel(data, columnNames));
		table.setCellSelectionEnabled(true);
		table.setColumnSelectionAllowed(true);
		JScrollPane scrollPane_3 = new JScrollPane();
		splitPane_2.setRightComponent(scrollPane_3);
		scrollPane_3.setViewportView(table_2);

		table_2.setFillsViewportHeight(true);
		table_2.setModel(
				new DefaultTableModel(
						new Object[][] { { "Solar", "23", "10" }, { "Generator", "24", "1" },
								{ "Something Else", "25", "3" }, },
						new String[] { "Gadget", "Production", "Quantity" }));
		table_2.getColumnModel().getColumn(0).setPreferredWidth(103);
		table_2.getColumnModel().getColumn(1).setPreferredWidth(107);
		table_2.getColumnModel().getColumn(2).setPreferredWidth(125);
		frmCyberPhysical.getContentPane().setLayout(new BorderLayout(0, 0));
		splitPane_2.setDividerLocation(200);

		splitPane.setLeftComponent(scrollPane_1);
		final Image img = new ImageIcon(this.getClass().getResource("/Images/Dummy_House.png")).getImage()
				.getScaledInstance(30, 30, java.awt.Image.SCALE_SMOOTH);
		Icon icon = new ImageIcon(img);
		DefaultTreeCellRenderer renderer = (DefaultTreeCellRenderer) tree.getCellRenderer();
		renderer.setLeafIcon(icon);
		// renderer.setClosedIcon(icon);
		// renderer.setOpenIcon(icon);
		tree.setRowHeight(icon.getIconHeight());
		tree.setCellRenderer(renderer);

		tree.addMouseListener(new MouseAdapter() {
			public void mouseReleased(MouseEvent e) {
				try {
					if (dragging) {
						HolonObject h = new HolonObject(actualObjectClicked);
						h.setPos((int) canvas.getMousePosition().getX(), (int) canvas.getMousePosition().getY());
						controller.addObject(h);
						canvas.repaint();
						dragging = false;
					}
				} catch (Exception e2) {
				}
				frmCyberPhysical.setCursor(new Cursor(Cursor.DEFAULT_CURSOR));
			}
		});

		tree.addMouseListener(new MouseAdapter() {
			public void mousePressed(MouseEvent e) {
				try {
					actualObjectClicked = tree.getPathForLocation(e.getX(), e.getY()).getLastPathComponent().toString();
					// System.out.println(name);
					if (actualObjectClicked.compareTo("Power Plant") == 0 || actualObjectClicked.compareTo("House") == 0
							|| actualObjectClicked.compareTo("Switch") == 0
							|| actualObjectClicked.compareTo("Transformer") == 0) {
						dragging = true;
						Cursor cursor = Toolkit.getDefaultToolkit().createCustomCursor(img, new Point(0, 0), "Image");
						frmCyberPhysical.setCursor(cursor);
					}
				} catch (Exception e2) {
				}
			}
		});

		/*
		 * tree.addTreeSelectionListener(new TreeSelectionListener() {
		 * 
		 * @Override public void valueChanged(TreeSelectionEvent e) { try {
		 * String name = tree.getLastSelectedPathComponent().toString();
		 * System.out.println(name); if (name.compareTo("Power Plant") == 0 ||
		 * name.compareTo("House") == 0 || name.compareTo("Switch") == 0 ||
		 * name.compareTo("Transformer") == 0) { dragging = true; Cursor cursor
		 * = Toolkit.getDefaultToolkit().createCustomCursor(img, new Point(0,
		 * 0), "red Cursor"); frmCyberPhysical.setCursor(cursor); } } catch
		 * (Exception e2) {} } });
		 */

		scrollPane_1.setViewportView(tree);

		scrollPane_1.setColumnHeaderView(panel);
		panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
		toolBar.setFloatable(false);

		panel.add(toolBar);
		toolBar.add(comboBox);
		comboBox.setModel(new DefaultComboBoxModel(new String[] { "Category", "Object", "Transformer", "Switch" }));
		// Add Button
		btnAdd.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {

				Object nodeInfo = tree.getLastSelectedPathComponent();
				String selectedOption = comboBox.getSelectedItem().toString();
				DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode) nodeInfo;

				switch (selectedOption) {

				case "Category":
					String catName = JOptionPane.showInputDialog("Please enter a Name for Category ");
					if (catName.length() != 0) {
						controller.addNewCategory(catName);
					}
					break;

				default:
					addObjectAction(selectedOption, selectedNode);
					break;
				}
			}
		});

		toolBar.add(btnAdd);

		// Del Button
		btnDel.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {

				Object nodeInfo = tree.getLastSelectedPathComponent();
				if (nodeInfo != null) {
					DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode) nodeInfo;
					String nodeName = selectedNode.getUserObject().toString();
					int depthOfNode = selectedNode.getLevel();

					switch (depthOfNode) {
					case 1:
						int dialogResult = JOptionPane.showConfirmDialog(null,
								"Do you realy want to delete the Category " + nodeName + "?", "Warning",
								JOptionPane.YES_NO_OPTION);
						if (dialogResult == JOptionPane.YES_OPTION) {
							controller.deleteCategory(nodeName);
							break;
						} else {
							break;
						}
					case 2:
						DefaultMutableTreeNode parent = (DefaultMutableTreeNode) selectedNode.getParent();
						controller.deleteObjectInCat(nodeName, parent.getUserObject().toString());
						break;

					default:
						JOptionPane.showMessageDialog(new JFrame(),
								"Please select a Category or an Object in order to delete something.");
					}
				} else {
					JOptionPane.showMessageDialog(new JFrame(),
							"Please select a Category or an Object in order to delete something.");
				}

			}
		});
		toolBar.add(btnDel);
		frmCyberPhysical.getContentPane().add(splitPane);

		mntmOpen.addActionListener(new java.awt.event.ActionListener() {
			@Override
			public void actionPerformed(java.awt.event.ActionEvent evt) {
				menuFileExitActionPerformed(evt);
			}

			private void menuFileExitActionPerformed(java.awt.event.ActionEvent evt) {
				JFileChooser fileChooser = new JFileChooser();
				JFrame test = new JFrame();
				if (fileChooser.showOpenDialog(test) == JFileChooser.APPROVE_OPTION) {
					File file = fileChooser.getSelectedFile();
					System.out.println("File Path is: " + file.toString());
				}
			}
		});

	}

	/*
	 * adds a specific object type to selected Category also handles input
	 * windows and illegal inputs
	 */
	public void addObjectAction(String objType, DefaultMutableTreeNode selectedNode) {
		if (selectedNode == null) {
			JOptionPane.showMessageDialog(new JFrame(),
					"Please select a Category first before adding " + objType + ".");
		}
		// if selected node is a directory for Categories
		else {
			if (selectedNode.getLevel() == 1) {
				String objname = JOptionPane.showInputDialog("Please enter a Name for the " + objType);
				Category cat = controller.searchCategory(selectedNode.getUserObject().toString());
				if(objname.equals("show")){
					addObjectPopUP = new AddObjectPopUp();
					addObjectPopUP.setVisible(true);
				}
				
				if(objname.length() != 0){
					switch (objType) {

					case "Object":
						controller.addNewObject(cat, objname);
						break;

					case "Switch":
						controller.addNewSwitch(cat, objname);

					case "Transformer":
						controller.addNewTransformer(cat, objname);
					}
				}
			} else {
				JOptionPane.showMessageDialog(new JFrame(),
						"Objects can not be added to Objects. Please select a Category.");
			}
		}
	}

	/**
	 * reloads the Categories from Model
	 */
	public void updateCategories(final ArrayList<Category> categories) {
		tree.setModel(new DefaultTreeModel(new DefaultMutableTreeNode("Categories") {
			{
				DefaultMutableTreeNode node_1;
				for (Category c : categories) {
					node_1 = new DefaultMutableTreeNode(c.getName());

					// kann eventuell umgeändert werden
					for (CpsObject obj : c.getObjects()) {
						node_1.add(new DefaultMutableTreeNode(obj.getObjName()));
					}
					add(node_1);
				}

			}
		}));
	}

	/**
	 * 
	 */
	public void onChange(ArrayList<Category> categories) {
		DefaultTreeModel model = (DefaultTreeModel) tree.getModel();
		updateCategories(categories);
		model.reload();
	}

	/**
	 * 
	 * @return
	 */
	public JFrame getFrmCyberPhysical() {
		return frmCyberPhysical;
	}

}