package org.leumasjaffe.charsheet.view.magic;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;

import javax.swing.JPanel;
import javax.swing.JPopupMenu;
import javax.swing.JTable;
import javax.swing.ListSelectionModel;

import org.leumasjaffe.charsheet.model.DDCharacter;
import org.leumasjaffe.charsheet.model.DDCharacterClass;
import org.leumasjaffe.charsheet.model.magic.DDSpell;
import org.leumasjaffe.charsheet.model.magic.DDSpellbook;
import org.leumasjaffe.charsheet.model.observable.BoolGate;
import org.leumasjaffe.charsheet.model.observable.IntValue;
import org.leumasjaffe.charsheet.util.AbilityHelper;
import org.leumasjaffe.event.SelectTableRowPopupMenuListener;
import org.leumasjaffe.format.StringHelper;

import lombok.AccessLevel;
import lombok.AllArgsConstructor;
import lombok.Getter;
import lombok.experimental.FieldDefaults;
import java.awt.GridBagLayout;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.Insets;

import javax.swing.border.BevelBorder;
import javax.swing.border.SoftBevelBorder;
import javax.swing.table.AbstractTableModel;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;

@SuppressWarnings("serial")
@FieldDefaults(level=AccessLevel.PRIVATE, makeFinal=true)
public class SelectSpellsPanel extends JPanel {
	
	private static final String NONE = "<none>";

	@AllArgsConstructor
	private static class SelectSpellModel extends AbstractTableModel {
		/**
		 * 
		 */
		private static final long serialVersionUID = 1L;
		
		final Object[] data;

		@Override
		public int getRowCount() {
			return data == null ? 0 : data.length;
		}

		@Override
		public int getColumnCount() {
			return 1;
		}

		@Override
		public Object getValueAt(int rowIndex, int columnIndex) {
			if (columnIndex != 0) { throw new IllegalArgumentException("There is only 1 column"); }
			return data[rowIndex];
		}
		
		@Override
		public void setValueAt(Object aValue, int rowIndex, int columnIndex) {
			if (columnIndex != 0) { throw new IllegalArgumentException("There is only 1 column"); }
			data[rowIndex] = aValue;
		}
	}

	@AllArgsConstructor
	@FieldDefaults(level=AccessLevel.PUBLIC, makeFinal=true)
	public static class Info {
		DDCharacter chara;
		DDCharacterClass dclass;
	}
	
	public static final String READY = "Is Filled Out";
	
	@Getter Collection<DDSpell> prepared;
	boolean allowsDuplicates;
	IntValue sharedValue;
	SelectSpellModel modelPrepared, modelKnown;
	
	public SelectSpellsPanel(Info info, BoolGate.Handle gate, int level, Collection<DDSpell> prepared, int toPrepare,
			Collection<DDSpell> avail, boolean allowsDuplicates, IntValue sharedValue) {
		this.allowsDuplicates = allowsDuplicates;
		this.sharedValue = sharedValue;
		final DDSpellbook spellBook = info.dclass.getSpellBook().get();
		this.prepared = new ArrayList<>(prepared);
		final List<DDSpell> known = new ArrayList<>(avail);
		this.modelPrepared = new SelectSpellModel(createPrepareModel(prepared, toPrepare));
		this.modelKnown = new SelectSpellModel(known.stream().map(DDSpell::getName).toArray());
		putClientProperty(READY, countNone() == 0);
		sharedValue.value(sharedValue.value() - this.modelPrepared.data.length + countNone());
		
		GridBagLayout gridBagLayout = new GridBagLayout();
		gridBagLayout.columnWidths = new int[]{0, 40, 0, 0};
		gridBagLayout.rowHeights = new int[]{20, 0, 0};
		gridBagLayout.columnWeights = new double[]{1.0, 0.0, 1.0, Double.MIN_VALUE};
		gridBagLayout.rowWeights = new double[]{0.0, 1.0, Double.MIN_VALUE};
		setLayout(gridBagLayout);
		
		JPanel panel = new ChooseSpellsPerDayHeader(level, spellBook, AbilityHelper.get(info.chara, info.dclass));
		GridBagConstraints gbc_panel = new GridBagConstraints();
		gbc_panel.gridwidth = 3;
		gbc_panel.insets = new Insets(0, 0, 5, 5);
		gbc_panel.fill = GridBagConstraints.BOTH;
		gbc_panel.gridx = 0;
		gbc_panel.gridy = 0;
		add(panel, gbc_panel);
		
		JScrollPane scrollPane_1 = new JScrollPane();
		scrollPane_1.setPreferredSize(new Dimension(175, 200));
		scrollPane_1.setViewportBorder(new SoftBevelBorder(BevelBorder.LOWERED, null, null, null, null));
		GridBagConstraints gbc_scrollPane_1 = new GridBagConstraints();
		gbc_scrollPane_1.insets = new Insets(0, 0, 0, 5);
		gbc_scrollPane_1.fill = GridBagConstraints.BOTH;
		gbc_scrollPane_1.gridx = 0;
		gbc_scrollPane_1.gridy = 1;
		add(scrollPane_1, gbc_scrollPane_1);
		
		JTable tablePrepared = new JTable(modelPrepared);
		tablePrepared.setTableHeader(null);
		scrollPane_1.setViewportView(tablePrepared);
		tablePrepared.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);

		JPanel panelDivider = new JPanel();
		GridBagConstraints gbc_panelDivider = new GridBagConstraints();
		gbc_panelDivider.insets = new Insets(0, 0, 0, 5);
		gbc_panelDivider.fill = GridBagConstraints.BOTH;
		gbc_panelDivider.gridx = 1;
		gbc_panelDivider.gridy = 1;
		add(panelDivider, gbc_panelDivider);
		GridBagLayout gbl_panelDivider = new GridBagLayout();
		gbl_panelDivider.columnWidths = new int[]{0, 0};
		gbl_panelDivider.rowHeights = new int[]{0, 0, 0, 0, 0};
		gbl_panelDivider.columnWeights = new double[]{0.0, Double.MIN_VALUE};
		gbl_panelDivider.rowWeights = new double[]{1.0, 0.0, 0.0, 1.0, Double.MIN_VALUE};
		panelDivider.setLayout(gbl_panelDivider);		
		
		JScrollPane scrollPane = new JScrollPane();
		scrollPane.setPreferredSize(new Dimension(175, 200));
		scrollPane.setViewportBorder(new SoftBevelBorder(BevelBorder.LOWERED, null, null, null, null));
		GridBagConstraints gbc_scrollPane = new GridBagConstraints();
		gbc_scrollPane.insets = new Insets(0, 0, 0, 5);
		gbc_scrollPane.fill = GridBagConstraints.BOTH;
		gbc_scrollPane.gridx = 2;
		gbc_scrollPane.gridy = 1;
		add(scrollPane, gbc_scrollPane);
		
		JTable tableKnown = new JTable(modelKnown);
		tableKnown.setTableHeader(null);
		scrollPane.setViewportView(tableKnown);
		tableKnown.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
		
		JPopupMenu popup = new JPopupMenu();
		popup.addPopupMenuListener(new SelectTableRowPopupMenuListener(popup, tableKnown));
		JMenuItem mntmInfo = new JMenuItem("Info");
		mntmInfo.addActionListener( e -> {
			DDSpell spell = known.get(tableKnown.getSelectedRow());
			JFrame frame = new JFrame(spell.getName() +  " (" + info.dclass.getName() + " " + level + ")");
			frame.add(new SpellInfoPanel(info.chara, info.dclass, spell));
			frame.pack();
			frame.setVisible(true);
		});
		popup.add(mntmInfo);
		tableKnown.setComponentPopupMenu(popup);
		
		JButton button = new JButton(">>");
		button.setMargin(new Insets(2, 8, 2, 8));
		GridBagConstraints gbc_button = new GridBagConstraints();
		gbc_button.insets = new Insets(0, 0, 5, 0);
		gbc_button.gridx = 0;
		gbc_button.gridy = 1;
		panelDivider.add(button, gbc_button);
		button.addActionListener(e -> {
			final int row = tablePrepared.getSelectedRow();
			if (row != -1 && !modelPrepared.data[row].equals(NONE)) {
				sharedValue.value(sharedValue.value() + 1);
				modelPrepared.setValueAt(NONE, row, 0);
			}
			tablePrepared.getSelectionModel().clearSelection();
			tablePrepared.repaint();
			if ((Boolean) getClientProperty(READY)) {
				putClientProperty(READY, false);
			}
		});
		
		JButton button_1 = new JButton("<<");
		button_1.setMargin(new Insets(2, 8, 2, 8));
		GridBagConstraints gbc_button_1 = new GridBagConstraints();
		gbc_button_1.insets = new Insets(0, 0, 5, 0);
		gbc_button_1.gridx = 0;
		gbc_button_1.gridy = 2;
		panelDivider.add(button_1, gbc_button_1);
		
		button_1.addActionListener(e -> {
			final int[] rows = tableKnown.getSelectedRows();
			final int[] orows = tablePrepared.getSelectedRows();
			if (sharedValue.value() == 0) {
				JOptionPane.showMessageDialog(this, "You have exceeded the shared limit on new spells", 
						"Error", JOptionPane.ERROR_MESSAGE);
			} else if (orows.length >= rows.length) {
				for (int i = 0; i < rows.length; ++i) {
					if (wouldHaveIllegalDuplicate(rows[i])) continue;
					modelPrepared.data[orows[i]] = modelKnown.data[rows[i]];
					sharedValue.value(sharedValue.value() - 1);
				}
			} else if (orows.length == 0 && countNone() >= rows.length) {
				replace(rows);
			} else {
				final String message = StringHelper.format(
						"Unable to assign new spells, more spells were selected ({}) than were avaliable ({})", 
						rows.length, orows.length == 0 ? countNone() : orows.length);
				JOptionPane.showMessageDialog(this, message, "Error", JOptionPane.ERROR_MESSAGE);
			}
			tableKnown.getSelectionModel().clearSelection();
			tablePrepared.getSelectionModel().clearSelection();
			tablePrepared.repaint();
			
			if (!gate.get() && !Arrays.asList(modelPrepared.data).contains(NONE)) {
				this.prepared.clear();
				for (Object o : modelPrepared.data) {
					this.prepared.add(DDSpell.fromString((String) o)); // TODO
				}
				gate.set(true);
			}
		});
	}

	public SelectSpellsPanel(Info info, BoolGate.Handle gate, int level,
			Collection<DDSpell> prepared, Collection<DDSpell> avail) {
		this(info, gate, level, prepared, 0, avail, true, new IntValue(-1));
	}

	private boolean wouldHaveIllegalDuplicate(int row) {
		return !this.allowsDuplicates && Arrays.asList(modelPrepared.data).contains(modelKnown.data[row]);
	}

	private String[] createPrepareModel(Collection<DDSpell> prepared, int toPrepare) {
		if (toPrepare <= prepared.size()) {
			return prepared.stream().map(DDSpell::getName).toArray(String[]::new);
		} else {
			String[] data = new String[toPrepare];
			int i = 0;
			for (DDSpell sp : prepared) {
				data[i++] = sp.getName();
			}
			for (; i < toPrepare; ++i) {
				data[i] = NONE;
			}
			return data;
		}
	}

	private void replace(int[] rows) {
		for (int i = 0; i < rows.length; ++i) {
			if (wouldHaveIllegalDuplicate(i)) continue;
			for (int j = 0; j < modelPrepared.data.length; ++j) {
				if (!modelPrepared.data[j].equals(NONE)) continue;
				modelPrepared.data[j] = modelKnown.data[rows[i]];
				sharedValue.value(sharedValue.value() - 1);
				break;
			}
		}
	}
	
	private int countNone() {
		int cnt = 0;
		for (Object o : modelPrepared.data) {
			if (o.equals(NONE)) ++cnt;
		}
		return cnt;
	}
}