package com.imyeyu.fx.utils;

import javafx.collections.ListChangeListener;
import javafx.geometry.BoundingBox;
import javafx.geometry.Bounds;
import javafx.geometry.Rectangle2D;
import javafx.stage.Screen;
import javafx.stage.Stage;
import com.imyeyu.utils.Digest;

import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;
import java.util.List;

/**
 * 多屏操作，可在所有屏幕显示标识，并提供选择参考
 *
 * @author 夜雨
 * @since 2021-11-11 21:02
 */
public class ScreenFX extends Stage {

	/** 主屏幕 */
	public static final Screen primary = Screen.getPrimary();

	/** 所有屏幕 */
	public static final List<Screen> SCREENS;

	static {
		SCREENS = new ArrayList<>(Screen.getScreens());
		SCREENS.sort((s1, s2) -> (int) (s2.getBounds().getMinX() - s1.getBounds().getMinX()));
		Screen.getScreens().addListener((ListChangeListener<Screen>) c -> {
			SCREENS.clear();
			SCREENS.addAll(Screen.getScreens());
			SCREENS.sort((s1, s2) -> (int) (s2.getBounds().getMinX() - s1.getBounds().getMinX()));
		});
	}

	// ---------- 静态功能 ----------

	/**
	 * 此屏幕参数 MD5
	 *
	 * @param screen 屏幕
	 * @return MD5
	 */
	public static String md5(Screen screen) throws NoSuchAlgorithmException {
		Rectangle2D r = screen.getBounds();
		return Digest.md5(String.valueOf(r.getMinX()) + r.getMinY() + r.getMaxX() + r.getMaxY() + r.getWidth() + r.getHeight());
	}

	/**
	 * 获取坐标所在屏幕
	 *
	 * @param x 坐标
	 * @param y 坐标
	 * @return 屏幕（在所有屏幕之外时返回 null）
	 */
	public static Screen getScreenByXY(double x, double y) {
		for (int i = 0; i < SCREENS.size(); i++) {
			if (isInScreen(SCREENS.get(i), x, y)) {
				return SCREENS.get(i);
			}
		}
		return null;
	}

	/**
	 * 该坐标是否溢出屏幕
	 *
	 * @param x 坐标
	 * @param y 坐标
	 * @return true 为溢出
	 */
	public static boolean outOfScreen(double x, double y) {
		return getScreenByXY(x, y) == null;
	}

	/**
	 * 判定该坐标是否在屏幕内
	 *
	 * @param screen 屏幕
	 * @param x      坐标
	 * @param y      坐标
	 * @return true 为存在
	 */
	public static boolean isInScreen(Screen screen, double x, double y) {
		final Rectangle2D r = screen.getBounds();
		return !(x < r.getMinX() || r.getMaxX() < x || y < r.getMinY() || r.getMaxY() < y);
	}

	/**
	 * 获取任务栏属性
	 *
	 * @param screen 屏幕
	 * @return 任务栏属性
	 */
	public static Bounds getTaskbarBounds(Screen screen) {
		if (screen == null) {
			return null;
		}
		Rectangle2D sb = screen.getBounds();
		Rectangle2D vb = screen.getVisualBounds();
		if (sb.getMinY() < vb.getMinY()) {
			// 顶
			return new BoundingBox(sb.getMinX(), sb.getMinY(), sb.getWidth(), sb.getHeight() - vb.getHeight());
		}
		if (vb.getMaxY() < sb.getMaxY()) {
			// 底
			return new BoundingBox(sb.getMinX(), vb.getMaxY(), sb.getWidth(), sb.getHeight() - vb.getHeight());
		}
		if (sb.getMinX() < vb.getMinX()) {
			// 左
			return new BoundingBox(sb.getMinX(), sb.getMinY(), sb.getWidth() - vb.getWidth(), sb.getHeight());
		}
		if (vb.getMaxX() < sb.getMaxX()) {
			// 右
			return new BoundingBox(vb.getMaxX(), sb.getMinY(), sb.getWidth() - vb.getWidth(), sb.getHeight());
		}
		return null;
	}
}