package ui.view;

import java.io.File;
import java.text.AttributedCharacterIterator;
import java.util.ArrayList;
import javax.swing.JFrame;
import javax.swing.JLabel;
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.TreeCellRenderer;
import ui.controller.Control;
import ui.model.*;

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

import java.awt.Color;
import java.awt.Component;
import java.awt.Cursor;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Shape;
import java.awt.Toolkit;
import java.awt.BorderLayout;

import javax.swing.JPanel;
import javax.swing.JToolBar;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.DefaultComboBoxModel;
import javax.swing.ImageIcon;

import classes.Category;
import classes.CpsObject;
import classes.HolonElement;
import classes.HolonObject;
import classes.HolonSwitch;
import classes.HolonTransformer;
import Interfaces.CategoryListener;

import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.image.ImageObserver;
import java.awt.event.ActionEvent;
import javax.swing.JSlider;
import javax.swing.event.ChangeListener;
import javax.swing.event.ChangeEvent;
import javax.swing.SwingConstants;

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 = new JTable();
	private DefaultTableModel tableModel = new DefaultTableModel();
	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
	private boolean dragging = false;
	private String actualObjectClicked;
	private Image img = null;
	private CpsObject tempCps = null;

	private MyCanvas canvas;
	private final JSplitPane splitPane_3 = new JSplitPane();
	private final JSlider slider = new JSlider();
	private final JLabel lblImageSize = new JLabel("Image Size");

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

	/**
	 * Initialize the contents of the frame.
	 */
	@SuppressWarnings({ "serial", "unchecked" })
	private void initialize() {
		frmCyberPhysical = new JFrame();
		frmCyberPhysical.setTitle("Cyber Physical Systems Model");
		frmCyberPhysical.setBounds(100, 100, 1000, 800);
		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);

		mnNewMenu_3.add(splitPane_3);
		
		slider.setMinimum(15);
		slider.setMaximum(115);
		slider.addChangeListener(new ChangeListener() {
			@Override
			public void stateChanged(ChangeEvent e) {
				controller.setScale(slider.getValue());
				tree.setRowHeight(model.getScale());
				canvas.objectSelectionHighlighting();
				canvas.repaint();
			}
		});
		splitPane_3.setRightComponent(slider);

		splitPane_3.setLeftComponent(lblImageSize);

		menuBar.add(mnHelp);

		canvas.setBackground(Color.WHITE);
		canvas.setPreferredSize(new Dimension(10000, 10000));
		JScrollPane canvasSP = new JScrollPane(canvas);

		tabbedPane.addTab("Modeling", new ImageIcon(new ImageIcon(this.getClass().getResource("/Images/home.png"))
				.getImage().getScaledInstance(30, 30, Image.SCALE_SMOOTH)), canvasSP, "Model a CPS");

		tabbedPane.addTab("Simulation",
				new ImageIcon(new ImageIcon(this.getClass().getResource("/Images/Dummy_House.png")).getImage()
						.getScaledInstance(30, 30, Image.SCALE_SMOOTH)),
				scrollPane_2, "Simulate the CPS");
		dtrpnHereWillBe.setText("Here will be the Simulation");

		scrollPane_2.setViewportView(dtrpnHereWillBe);

		JScrollPane scrollPane = new JScrollPane();
		// Table Set up
		Object[] columnNames = { "Device", "Type", "Energy", "Quantity" };
		tableModel.setColumnIdentifiers(columnNames);
		table.setModel(tableModel);
		scrollPane.setViewportView(table);
		table.setFillsViewportHeight(true);
		table.setCellSelectionEnabled(true);
		table.setColumnSelectionAllowed(true);

		frmCyberPhysical.getContentPane().setLayout(new BorderLayout(0, 0));

		TreeCellRenderer customRenderer = new TreeCellRenderer() {
			@Override
			public Component getTreeCellRendererComponent(JTree tree, Object value, boolean selected, boolean expanded,
					boolean leaf, int row, boolean hasFocus) {
				JLabel label = new JLabel();
				Image imgR = null;
				if (leaf) {
					for (Category cat : model.getCategories()) {
						for (CpsObject cps : cat.getObjects()) {
							if (value.toString().compareTo(cps.getCompareName()) == 0) {
								imgR = new ImageIcon(this.getClass().getResource(cps.getImage())).getImage()
										.getScaledInstance(controller.getScale(), controller.getScale(),
												java.awt.Image.SCALE_SMOOTH);
								if (imgR != null) {
									label.setIcon(new ImageIcon(imgR));
								}
								label.setText(cps.getName());
							}
						}
					}
				}
				tree.setRowHeight(controller.getScale());
				if (hasFocus) {
					label.setForeground(new Color(0, 0, 255));
					label.setOpaque(true);
				}
				if (label.getText().length() == 0) {
					label.setText(value.toString());
					if (value.toString().compareTo("Categories") != 0) {
						label.setIcon(new ImageIcon(this.getClass().getResource("/Images/folder.png")));
					}
				}

				return label;

			}
		};

		tree.setCellRenderer(customRenderer);

		tree.addMouseListener(new MouseAdapter() {
			public void mouseReleased(MouseEvent e) {
				try {
					if (dragging) {
						int x = (int) canvas.getMousePosition().getX();
						int y = (int) canvas.getMousePosition().getY();
						CpsObject h = null;
						if (tempCps.getClass() == HolonObject.class) {
							h = new HolonObject(tempCps);
						}
						if (tempCps.getClass() == HolonSwitch.class) {
							h = new HolonSwitch(tempCps);
						}
						if (tempCps.getClass() == HolonTransformer.class) {
							h = new HolonTransformer(tempCps);
						}

						h.setPosition(x, y);
						controller.addObjectCanvas(h);
						for (int i = 0; i < model.getObjectsOnCanvas().size(); i++) {
							CpsObject temp = model.getObjectsOnCanvas().get(i);
							String output = "Element: " + temp.getObjName() + " with ID: " + temp.getID();

							if (temp.getClass() == HolonObject.class) {
								output = output + " and Elements: " + ((HolonObject) temp).toStringElements();
							}
							System.out.println(output);
						}
						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();
					for (Category cat : model.getCategories()) {
						for (CpsObject cps : cat.getObjects()) {
							if (actualObjectClicked.compareTo(cps.getCompareName()) == 0) {
								img = new ImageIcon(this.getClass().getResource(cps.getImage())).getImage()
										.getScaledInstance(controller.getScale(), controller.getScale(),
												java.awt.Image.SCALE_SMOOTH);
								tempCps = cps;
								dragging = true;
								Cursor cursor = Toolkit.getDefaultToolkit().createCustomCursor(img, new Point(0, 0),
										"Image");
								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.addCategory(catName);
					}
					break;

				case "Object":
					if (selectedNode == null) {
						JOptionPane.showMessageDialog(new JFrame(),
								"Please select a Category first before adding " + selectedOption + ".");
					}
					if (selectedNode.getLevel() == 1) {
						addObjectPopUP = new AddObjectPopUp();
						addObjectPopUP.setVisible(true);
						addObjectPopUP.setController(controller);
						addObjectPopUP.setCategory(selectedNode.toString());
					}
					break;

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

		canvas.addMouseListener(new MouseAdapter() {
			@Override
			public void mousePressed(MouseEvent e) {
				if (tableModel.getRowCount() > 0) {
					for (int i = tableModel.getRowCount() - 1; i > -1; i--) {
						tableModel.removeRow(i);
					}
				}
				if (canvas.dataSelected != null) {
					for (HolonElement he : canvas.dataSelected) {
						Object[] temp = { he.getEleName(), he.getSign(), he.getEnergy(), he.getAmount() };
						tableModel.addRow(temp);
					}
				}
				table.clearSelection();
			}
		});

		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.delObjectCategory(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());
				}
			}
		});

		splitPane.setRightComponent(splitPane_1);
		splitPane.setDividerLocation(200);
		splitPane_1.setDividerLocation(500);
		splitPane.setLeftComponent(scrollPane_1);
		splitPane_1.setLeftComponent(tabbedPane);
		splitPane_1.setRightComponent(scrollPane);
	}

	/*
	 * 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.length() != 0) {
					switch (objType) {

					case "Switch":
						controller.addSwitch(cat, objname, objType);
						break;

					case "Transformer":
						controller.addTransformer(cat, objname, objType);
						break;
					}
				}
			} 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;
	}

}