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/*
 * Copyright (C) 2023 Parisi Alessandro - [email protected]
 * This file is part of MaterialFX (https://github.com/palexdev/MaterialFX)
 *
 * MaterialFX is free software: you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 3 of the License,
 * or (at your option) any later version.
 *
 * MaterialFX is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with MaterialFX. If not, see .
 */

package io.github.palexdev.mfxeffects.enums;

import io.github.palexdev.mfxeffects.animations.Animations.KeyFrames;
import io.github.palexdev.mfxeffects.animations.Animations.TimelineBuilder;
import io.github.palexdev.mfxeffects.animations.motion.Motion;
import javafx.animation.Interpolator;
import javafx.scene.effect.BlurType;
import javafx.scene.effect.DropShadow;
import javafx.scene.paint.Color;

import java.util.Arrays;

/**
 * Enumerator which defines 6 levels of {@code DropShadow} effects from {@code LEVEL0} to {@code LEVEL5}.
 */
public enum ElevationLevel {
	// 0dp
	LEVEL0(Color.rgb(0, 0, 0, 0), 0, 0, 0, 0),

	// 1dp
	LEVEL1(3, 0.12, 0, 2),

	// 3dp
	LEVEL2(8, 0.16, 0, 3),

	// 6dp
	LEVEL3(18, 0.19, 0, 3),

	// 8dp
	LEVEL4(14, 0.25, 0, 5),

	// 12dp
	LEVEL5(16, 0.30, 0, 7);

	private final Color color;
	private final double radius;
	private final double spread;
	private final double offsetX;
	private final double offsetY;

	ElevationLevel(double radius, double spread, double offsetX, double offsetY) {
		this(Color.rgb(0, 0, 0, 0.20), radius, spread, offsetX, offsetY);
	}

	ElevationLevel(Color color, double radius, double spread, double offsetX, double offsetY) {
		this.color = color;
		this.radius = radius;
		this.spread = spread;
		this.offsetX = offsetX;
		this.offsetY = offsetY;
	}

	public Color getColor() {
		return color;
	}

	public double getRadius() {
		return radius;
	}

	public double getSpread() {
		return spread;
	}

	public double getOffsetX() {
		return offsetX;
	}

	public double getOffsetY() {
		return offsetY;
	}

	/**
	 * Retrieves the next {@code DepthLevel} associated with {@code this} enumerator.
	 *
	 * @return The next {@code DepthLevel}
	 */
	public ElevationLevel next() {
		return values()[(this.ordinal() + 1) % values().length];
	}

	public void animateTo(DropShadow current, ElevationLevel next) {
		Interpolator i = Motion.EASE;
		TimelineBuilder.build()
				.add(KeyFrames.of(1, current.offsetXProperty(), next.getOffsetX(), i))
				.add(KeyFrames.of(1, current.offsetYProperty(), next.getOffsetY(), i))
				.add(KeyFrames.of(250, current.radiusProperty(), next.getRadius(), i))
				.add(KeyFrames.of(250, current.spreadProperty(), next.getSpread(), i))
				.getAnimation().play();
	}

	public DropShadow toShadow() {
		return new DropShadow(
				BlurType.GAUSSIAN, getColor(),
				getRadius(), getSpread(),
				getOffsetX(), getOffsetY()
		);
	}

	/**
	 * Attempts to get the corresponding {@code DepthLevel} of the given {@link DropShadow} effect.
	 * If the given effect is not recognized as being generated by this class the {@code null} is returned.
	 * 
	 * Uses {@link #levelEqualsShadow(ElevationLevel, DropShadow)} to check for equality.
	 */
	public static ElevationLevel from(DropShadow shadow) {
		return Arrays.stream(values()).filter(depthLevel -> levelEqualsShadow(depthLevel, shadow))
				.findFirst()
				.orElse(null);
	}

	/**
	 * Checks if the given {@link DropShadow} effect is equal to the given {@code DepthLevel}.
	 */
	public static boolean levelEqualsShadow(ElevationLevel level, DropShadow shadow) {
		return level.color.equals(shadow.getColor()) &&
				level.offsetX == shadow.getOffsetX() &&
				level.offsetY == shadow.getOffsetY() &&
				level.radius == shadow.getRadius() &&
				level.spread == shadow.getSpread();
	}
}