package jrummikub.view.impl;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.ArrayList;
import java.util.List;

import javax.swing.BoxLayout;
import javax.swing.Icon;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPopupMenu;
import javax.swing.JScrollPane;
import javax.swing.JTabbedPane;
import javax.swing.JTextField;
import javax.swing.border.CompoundBorder;
import javax.swing.border.EmptyBorder;
import javax.swing.border.LineBorder;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;

import jrummikub.model.GameSettings;
import jrummikub.model.PlayerSettings;
import jrummikub.util.Event;
import jrummikub.util.Event1;
import jrummikub.util.Event2;
import jrummikub.util.IEvent;
import jrummikub.util.IEvent1;
import jrummikub.util.IEvent2;
import jrummikub.view.ISettingsPanel;

@SuppressWarnings("serial")
class SettingsPanel extends JPanel implements ISettingsPanel {
	private JPanel playerSetupPanel;
	private JPanel playerSettingsViewport;
	private JPanel ruleSetupPanel;
	private JButton addPlayerButton;
	private JLabel errorMessageLabel;
	private JButton startButton;

	private boolean removeButtonsEnabled = true;
	private List<PlayerSettingsPanel> playerSettingsPanels = new ArrayList<PlayerSettingsPanel>();

	private Event startGameEvent = new Event();
	private Event addPlayerEvent = new Event();
	private Event1<Integer> removePlayerEvent = new Event1<Integer>();
	private Event2<Integer, Color> changePlayerColorEvent = new Event2<Integer, Color>();
	private Event2<Integer, String> changePlayerNameEvent = new Event2<Integer, String>();
	private Event1<Integer> changeInitialMeldThresholdEvent = new Event1<Integer>();

	@Override
	public IEvent getStartGameEvent() {
		return startGameEvent;
	}

	@Override
	public IEvent getAddPlayerEvent() {
		return addPlayerEvent;
	}

	@Override
	public IEvent1<Integer> getRemovePlayerEvent() {
		return removePlayerEvent;
	}

	@Override
	public IEvent2<Integer, Color> getChangePlayerColorEvent() {
		return changePlayerColorEvent;
	}

	@Override
	public IEvent2<Integer, String> getChangePlayerNameEvent() {
		return changePlayerNameEvent;
	}

	@Override
	public IEvent1<Integer> getChangeInitialMeldThresholdEvent() {
		return changeInitialMeldThresholdEvent;
	}

	@Override
	public void setError(SettingsError error) {
		switch (error) {
			case NO_ERROR:
				errorMessageLabel.setText(" ");
				break;
			case DUPLICATE_PLAYER_NAME:
				errorMessageLabel
						.setText("Jeder Spielername darf nur einmal verwendet werden.");
				break;
			case NO_PLAYER_NAME:
				errorMessageLabel.setText("Jeder Spieler muss einen Namen haben.");
				break;
		}
	}

	@Override
	public void enableStartGameButton(boolean enable) {
		startButton.setEnabled(enable);
	}

	@Override
	public void enableAddPlayerButton(boolean enable) {
		addPlayerButton.setVisible(enable);
	}

	@Override
	public void enableRemovePlayerButtons(boolean enable) {
		removeButtonsEnabled = enable;
		for (PlayerSettingsPanel psp : playerSettingsPanels) {
			psp.enableRemoveButton(enable);
		}
	}

	@Override
	public void setGameSettings(GameSettings gameSettings) {
		while (playerSettingsPanels.size() > gameSettings.getPlayerList().size()) {
			removePlayerSettingsPanel();
		}

		for (int i = 0; i < gameSettings.getPlayerList().size(); ++i) {
			updatePlayerSettingsPanel(i, gameSettings.getPlayerList().get(i));
		}

		playerSettingsViewport.revalidate();
	}

	private void updatePlayerSettingsPanel(int i, PlayerSettings settings) {
		if (i < playerSettingsPanels.size()) {
			playerSettingsPanels.get(i).setSettings(settings);
		} else {
			addPlayerSettingsPanel(i, settings);
		}
	}

	private void addPlayerSettingsPanel(int i, PlayerSettings settings) {
		PlayerSettingsPanel panel = new PlayerSettingsPanel(i, settings);
		playerSettingsPanels.add(panel);
		playerSettingsViewport.add(panel,
				playerSettingsViewport.getComponentCount() - 1);
	}

	private void removePlayerSettingsPanel() {
		PlayerSettingsPanel p = playerSettingsPanels.remove(playerSettingsPanels
				.size() - 1);
		playerSettingsViewport.remove(p);
	}

	private void createPlayerSetupPanel() {
		playerSetupPanel = new JPanel();
		playerSetupPanel.setLayout(new BorderLayout());

		playerSettingsViewport = new JPanel();
		playerSettingsViewport.setLayout(new BoxLayout(playerSettingsViewport,
				BoxLayout.Y_AXIS));

		JScrollPane scrollPane = new JScrollPane(playerSettingsViewport,
				JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
				JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
		playerSetupPanel.add(scrollPane);

		JPanel addPlayerPanel = new JPanel();
		addPlayerPanel.setLayout(new FlowLayout(FlowLayout.TRAILING, 0, 2));
		playerSettingsViewport.add(addPlayerPanel);

		addPlayerButton = new JButton("+");
		addPlayerButton.setFont(addPlayerButton.getFont().deriveFont(Font.BOLD));
		addPlayerButton.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				addPlayerEvent.emit();
			}
		});
		addPlayerPanel.add(addPlayerButton);
	}

	private void createRuleSetupPanel() {
		ruleSetupPanel = new JPanel();
	}

	SettingsPanel() {
		setLayout(new GridBagLayout());

		final JTabbedPane tabbedPane = new JTabbedPane();

		createPlayerSetupPanel();
		tabbedPane.addTab("Spieler", playerSetupPanel);

		createRuleSetupPanel();
		tabbedPane.addTab("Regeln", ruleSetupPanel);

		GridBagConstraints c = new GridBagConstraints();
		c.fill = GridBagConstraints.BOTH;
		c.gridwidth = GridBagConstraints.REMAINDER;
		c.weightx = 1;
		c.weighty = 1;
		add(tabbedPane, c);

		errorMessageLabel = new JLabel(" ");
		errorMessageLabel.setForeground(Color.RED);
		c.weighty = 0;
		add(errorMessageLabel, c);

		startButton = new JButton("Spiel starten");
		startButton.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				startGameEvent.emit();
			}
		});
		add(startButton, c);

		setBorder(new CompoundBorder(new LineBorder(Color.BLACK), new EmptyBorder(
				10, 10, 10, 10)));
	}

	private class PlayerSettingsPanel extends JPanel {
		private int playerNumber;
		private JButton colorButton;
		private JTextField nameField;
		private JButton removeButton;

		public void setSettings(PlayerSettings settings) {
			if (!nameField.getText().equals(settings.getName())) {
				nameField.setText(settings.getName());
			}

			colorButton
					.setIcon(ImageUtil.createColorIcon(settings.getColor(), 16, 2));
		}

		public void enableRemoveButton(boolean enable) {
			removeButton.setEnabled(enable);
		}

		public PlayerSettingsPanel(int playerNumber, PlayerSettings settings) {
			setLayout(new BorderLayout());

			this.playerNumber = playerNumber;

			colorButton = new JButton();
			nameField = new JTextField(settings.getName());

			setSettings(settings);

			colorButton.addActionListener(new ActionListener() {
				@Override
				public void actionPerformed(ActionEvent e) {
					new ColorMenu();
				}
			});
			add(colorButton, BorderLayout.WEST);

			nameField.getDocument().addDocumentListener(new DocumentListener() {
				@Override
				public void insertUpdate(DocumentEvent e) {
					changeName();
				}

				@Override
				public void removeUpdate(DocumentEvent e) {
					changeName();
				}

				@Override
				public void changedUpdate(DocumentEvent e) {
					changeName();
				}
			});
			add(nameField);

			removeButton = new JButton("\u00d7");
			removeButton.setFont(removeButton.getFont().deriveFont(Font.BOLD));
			removeButton.addActionListener(new ActionListener() {
				@Override
				public void actionPerformed(ActionEvent e) {
					remove();
				}
			});
			removeButton.setEnabled(removeButtonsEnabled);
			add(removeButton, BorderLayout.EAST);
		}

		@Override
		public Dimension getPreferredSize() {
			return getComponent(1).getPreferredSize();
		}

		@Override
		public Dimension getMaximumSize() {
			return new Dimension(Integer.MAX_VALUE, getPreferredSize().height);
		}

		private void changeName() {
			changePlayerNameEvent.emit(playerNumber, nameField.getText());
		}

		private void changeColor(Color c) {
			changePlayerColorEvent.emit(playerNumber, c);
		}

		private void remove() {
			removePlayerEvent.emit(playerNumber);
		}

		private class ColorMenu extends JPanel {
			ColorMenu() {
				setLayout(new GridLayout(4, 4, 1, 1));

				JPopupMenu menu = new JPopupMenu();

				for (Color c : PLAYER_COLORS) {
					add(new ColorButton(c, menu));
				}

				menu.setLayout(new BorderLayout());
				menu.add(this);
				menu.show(colorButton, 0, colorButton.getHeight());
			}

			private class ColorButton extends JLabel {
				ColorButton(final Color c, final JPopupMenu menu) {
					final Icon normalIcon = ImageUtil.createColorIcon(c, 16, 1);
					final Icon hoverIcon = ImageUtil.createColorIcon(c, 16, 2);

					setIcon(normalIcon);

					addMouseListener(new MouseAdapter() {
						@Override
						public void mouseEntered(MouseEvent e) {
							setIcon(hoverIcon);
						}

						@Override
						public void mouseExited(MouseEvent e) {
							setIcon(normalIcon);
						}

						@Override
						public void mouseClicked(MouseEvent e) {
							menu.setVisible(false);
							changeColor(c);
						}
					});
				}
			}
		}
	}
}