import { Vector2 } from './Vector2.js';

const _vector = /*@__PURE__*/ new Vector2();

class Box2 {
	constructor(min = new Vector2(+Infinity, +Infinity), max = new Vector2(-Infinity, -Infinity)) {
		this.min = min;
		this.max = max;
	}

	set(min, max) {
		this.min.copy(min);
		this.max.copy(max);

		return this;
	}

	setFromPoints(points) {
		this.makeEmpty();

		for (let i = 0, il = points.length; i < il; i++) {
			this.expandByPoint(points[i]);
		}

		return this;
	}

	setFromCenterAndSize(center, size) {
		const halfSize = _vector.copy(size).multiplyScalar(0.5);
		this.min.copy(center).sub(halfSize);
		this.max.copy(center).add(halfSize);

		return this;
	}

	clone() {
		return new this.constructor().copy(this);
	}

	copy(box) {
		this.min.copy(box.min);
		this.max.copy(box.max);

		return this;
	}

	makeEmpty() {
		this.min.x = this.min.y = +Infinity;
		this.max.x = this.max.y = -Infinity;

		return this;
	}

	isEmpty() {
		// this is a more robust check for empty than ( volume <= 0 ) because volume can get positive with two negative axes

		return this.max.x < this.min.x || this.max.y < this.min.y;
	}

	getCenter(target) {
		return this.isEmpty() ? target.set(0, 0) : target.addVectors(this.min, this.max).multiplyScalar(0.5);
	}

	getSize(target) {
		return this.isEmpty() ? target.set(0, 0) : target.subVectors(this.max, this.min);
	}

	expandByPoint(point) {
		this.min.min(point);
		this.max.max(point);

		return this;
	}

	expandByVector(vector) {
		this.min.sub(vector);
		this.max.add(vector);

		return this;
	}

	expandByScalar(scalar) {
		this.min.addScalar(-scalar);
		this.max.addScalar(scalar);

		return this;
	}

	containsPoint(point) {
		return point.x < this.min.x || point.x > this.max.x || point.y < this.min.y || point.y > this.max.y ? false : true;
	}

	containsBox(box) {
		return this.min.x <= box.min.x && box.max.x <= this.max.x && this.min.y <= box.min.y && box.max.y <= this.max.y;
	}

	getParameter(point, target) {
		// This can potentially have a divide by zero if the box
		// has a size dimension of 0.

		return target.set((point.x - this.min.x) / (this.max.x - this.min.x), (point.y - this.min.y) / (this.max.y - this.min.y));
	}

	intersectsBox(box) {
		// using 4 splitting planes to rule out intersections

		return box.max.x < this.min.x || box.min.x > this.max.x || box.max.y < this.min.y || box.min.y > this.max.y ? false : true;
	}

	clampPoint(point, target) {
		return target.copy(point).clamp(this.min, this.max);
	}

	distanceToPoint(point) {
		const clampedPoint = _vector.copy(point).clamp(this.min, this.max);
		return clampedPoint.sub(point).length();
	}

	intersect(box) {
		this.min.max(box.min);
		this.max.min(box.max);

		return this;
	}

	union(box) {
		this.min.min(box.min);
		this.max.max(box.max);

		return this;
	}

	translate(offset) {
		this.min.add(offset);
		this.max.add(offset);

		return this;
	}

	equals(box) {
		return box.min.equals(this.min) && box.max.equals(this.max);
	}
}

Box2.prototype.isBox2 = true;

export { Box2 };