/****************************************************************************
 * Copyright 2017 EPAM Systems
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ***************************************************************************/

var Vec2 = require('./vec2');

function Box2Abs() {
	if (arguments.length == 1 && 'min' in arguments[0] && 'max' in arguments[0]) {
		this.p0 = arguments[0].min;
		this.p1 = arguments[0].max;
	}
	if (arguments.length == 2) {
		this.p0 = arguments[0];
		this.p1 = arguments[1];
	} else if (arguments.length == 4) {
		this.p0 = new Vec2(arguments[0], arguments[1]);
		this.p1 = new Vec2(arguments[2], arguments[3]);
	} else if (arguments.length == 0) {
		this.p0 = new Vec2();
		this.p1 = new Vec2();
	} else {
		new Error('Box2Abs constructor only accepts 4 numbers or 2 vectors or no arguments!');
	}
}

Box2Abs.prototype.toString = function () {
	return this.p0.toString() + ' ' + this.p1.toString();
};

Box2Abs.fromRelBox = function (relBox) {
	console.assert(!!relBox);
	return new Box2Abs(relBox.x, relBox.y, relBox.x + relBox.width, relBox.y + relBox.height);
};

Box2Abs.prototype.clone = function () {
	return new Box2Abs(this.p0, this.p1);
};

Box2Abs.union = function (/* Box2Abs*/b1, /* Box2Abs*/b2) {
	console.assert(!!b1);
	console.assert(!!b2);
	return new Box2Abs(Vec2.min(b1.p0, b2.p0), Vec2.max(b1.p1, b2.p1));
};

Box2Abs.prototype.extend = function (/* Vec2*/lp, /* Vec2*/rb) {
	console.assert(!!lp);
	rb = rb || lp;
	return new Box2Abs(this.p0.sub(lp), this.p1.add(rb));
};

Box2Abs.prototype.include = function (/* Vec2*/p) {
	console.assert(!!p);
	return new Box2Abs(this.p0.min(p), this.p1.max(p));
};

Box2Abs.prototype.contains = function (/* Vec2*/p, /* float*/ext) {
	ext = (ext || 0) - 0;
	console.assert(!!p);
	return p.x >= this.p0.x - ext && p.x <= this.p1.x + ext && p.y >= this.p0.y - ext && p.y <= this.p1.y + ext;
};

Box2Abs.prototype.translate = function (/* Vec2*/d) {
	console.assert(!!d);
	return new Box2Abs(this.p0.add(d), this.p1.add(d));
};

Box2Abs.prototype.transform = function (/* function(Vec2):Vec2*/f, options) {
	console.assert(!!f);
	return new Box2Abs(f(this.p0, options), f(this.p1, options));
};

Box2Abs.prototype.sz = function () {
	return this.p1.sub(this.p0);
};

Box2Abs.prototype.centre = function () {
	return Vec2.centre(this.p0, this.p1);
};

Box2Abs.prototype.pos = function () {
	return this.p0;
};

module.exports = Box2Abs;