/*
Copyright (c) 2022 Andrew Auclair

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
 */
package io.github.andrewauclair.moderndocking.internal.floating;

import io.github.andrewauclair.moderndocking.internal.DockableWrapper;
import io.github.andrewauclair.moderndocking.settings.Settings;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Cursor;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.Point;
import java.util.Collections;
import java.util.List;
import javax.swing.BorderFactory;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTabbedPane;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;

/**
 * this is a frame used temporarily when floating a panel
 */
public class TempFloatingFrame extends JFrame {
	private static final int BORDER_SIZE = 2;
	/**
	 * The dockables that we are currently floating
	 */
	private final List<DockableWrapper> dockables;
	/**
	 * The selected index in the group of dockables
	 */
	private final int selectedIndex;

	/**
	 * Create a new temporary floating frame for a floating dockable
	 *
	 * @param dockable The dockable that we are currently floating
	 * @param dragSrc The source of the drag. Used to assign the frame to the proper screen location
	 * @param size The desired size of the frame
	 */
	public TempFloatingFrame(DockableWrapper dockable, JComponent dragSrc, Dimension size) {
		setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
		setTitle("Temp Floating Frame");
		dockables = Collections.emptyList();
		selectedIndex = 0;

		build(dockable.getDisplayPanel(), dragSrc, size);
	}

	/**
	 * Create a new temporary floating frame for a floating dockable
	 *
	 * @param dockables The dockables that we are currently floating
	 * @param selectedIndex The selected index in the group of dockables
	 * @param dragSrc The source of the drag. Used to assign the frame to the proper screen location
	 * @param size The desired size of the frame
	 */
	public TempFloatingFrame(List<DockableWrapper> dockables, int selectedIndex, JComponent dragSrc, Dimension size) {
		setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

		setTitle("Temp Floating Frame");

		this.dockables = dockables;
		this.selectedIndex = selectedIndex;

		JTabbedPane tabs = new JTabbedPane();

		// we only support tabs on top if we have FlatLaf because we can add a trailing component for our menu
		boolean usingFlatLaf = tabs.getUI().getClass().getPackageName().startsWith("com.formdev.flatlaf");

		if (Settings.alwaysDisplayTabsMode() && usingFlatLaf) {
			tabs.setTabPlacement(JTabbedPane.TOP);
		}
		else {
			tabs.setTabPlacement(JTabbedPane.BOTTOM);
		}

		for (DockableWrapper dockable : dockables) {
			tabs.add(dockable.getDockable().getTabText(), dockable.getDisplayPanel());
		}
		tabs.setSelectedIndex(selectedIndex);

		build(tabs, dragSrc, size);
	}

	/**
	 * Create a new temporary floating frame to contain a dockable that has started to float
	 *
	 * @param dockable Dockable in the floating frame
	 * @param dragSrc The source of the drag
	 */
	private void build(JComponent dockable, JComponent dragSrc, Dimension size) {
		setLayout(new BorderLayout()); // keep it simple, just use border layout
		setUndecorated(true); // hide the frame
		setType(Type.UTILITY); // keeps the frame from appearing in the task bar frames
		setCursor(Cursor.getPredefinedCursor(Cursor.MOVE_CURSOR)); //  this frame is only showing while moving

		// size the frame to the dockable size
		setSize(size);

		// set the frame position to match the current dockable position
		Point newPoint = new Point(dragSrc.getLocation());

		// when dragging from a tab there is no parent for the drag source
		if (dragSrc.getParent() != null) {
			SwingUtilities.convertPointToScreen(newPoint, dragSrc.getParent());
		}

		setLocation(newPoint);

		// put the dockable in a panel with a border around it to make it look better
		JPanel panel = new JPanel(new GridBagLayout());

		GridBagConstraints gbc = new GridBagConstraints();
		gbc.insets = new Insets(0, 0, 0, 0);
		gbc.gridy = 0;
		gbc.gridx = 0;
		gbc.weightx = 1.0;
		gbc.weighty = 1.0;
		gbc.fill = GridBagConstraints.BOTH;

		// set a border around the panel in the component focus color. this lets us distinguish the dockable panel from other windows.
		Color color = UIManager.getColor("Component.focusColor");
		panel.setBorder(BorderFactory.createLineBorder(color, BORDER_SIZE));
		panel.add(dockable, gbc);

		add(panel, BorderLayout.CENTER);

		setVisible(true);
	}

	/**
	 * The dockables that are in this temporary floating frame
	 *
	 * @return List of dockables
	 */
	public List<DockableWrapper> getDockables() {
		return dockables;
	}

	/**
	 * The selected dockable index
	 *
	 * @return Selected index
	 */
	public int getSelectedIndex() {
		return selectedIndex;
	}
}
