/**
 * @author bhouston / http://exocortex.com
 * @author TristanVALCKE / https://github.com/Itee
 */
/* global QUnit */

import { Vector2 } from '../../../../src/math/Vector2';
import { Matrix3 } from '../../../../src/math/Matrix3';
import { BufferAttribute } from '../../../../src/core/BufferAttribute';
import {
	x,
	y,
	eps
} from './Constants.tests';

export default QUnit.module( 'Maths', () => {

	QUnit.module( 'Vector2', () => {

		// INSTANCING
		QUnit.test( "Instancing", ( assert ) => {

			var a = new Vector2();
			assert.ok( a.x == 0, "Passed!" );
			assert.ok( a.y == 0, "Passed!" );

			var a = new Vector2( x, y );
			assert.ok( a.x === x, "Passed!" );
			assert.ok( a.y === y, "Passed!" );

		} );

		// PROPERTIES // ( [Itee] WHAT ??? o_O )
		QUnit.test( "properties", ( assert ) => {

			var a = new Vector2( 0, 0 );
			var width = 100;
			var height = 200;

			assert.ok( a.width = width, "Set width" );
			assert.ok( a.height = height, "Set height" );

			a.set( width, height );
			assert.strictEqual( a.width, width, "Get width" );
			assert.strictEqual( a.height, height, "Get height" );

		} );

		QUnit.todo( "width", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.todo( "height", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		// PUBLIC STUFF
		QUnit.todo( "isVector2", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.test( "set", ( assert ) => {

			var a = new Vector2();
			assert.ok( a.x == 0, "Passed!" );
			assert.ok( a.y == 0, "Passed!" );

			a.set( x, y );
			assert.ok( a.x == x, "Passed!" );
			assert.ok( a.y == y, "Passed!" );

		} );

		QUnit.todo( "setScalar", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.todo( "setX", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.todo( "setY", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.todo( "setComponent", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.todo( "getComponent", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.todo( "clone", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.test( "copy", ( assert ) => {

			var a = new Vector2( x, y );
			var b = new Vector2().copy( a );
			assert.ok( b.x == x, "Passed!" );
			assert.ok( b.y == y, "Passed!" );

			// ensure that it is a true copy
			a.x = 0;
			a.y = - 1;
			assert.ok( b.x == x, "Passed!" );
			assert.ok( b.y == y, "Passed!" );

		} );

		QUnit.test( "add", ( assert ) => {

			var a = new Vector2( x, y );
			var b = new Vector2( - x, - y );

			a.add( b );
			assert.ok( a.x == 0, "Passed!" );
			assert.ok( a.y == 0, "Passed!" );

			var c = new Vector2().addVectors( b, b );
			assert.ok( c.x == - 2 * x, "Passed!" );
			assert.ok( c.y == - 2 * y, "Passed!" );

		} );

		QUnit.todo( "addScalar", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.todo( "addVectors", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.test( "addScaledVector", ( assert ) => {

			var a = new Vector2( x, y );
			var b = new Vector2( 2, 3 );
			var s = 3;

			a.addScaledVector( b, s );
			assert.strictEqual( a.x, x + b.x * s, "Check x" );
			assert.strictEqual( a.y, y + b.y * s, "Check y" );

		} );

		QUnit.test( "sub", ( assert ) => {

			var a = new Vector2( x, y );
			var b = new Vector2( - x, - y );

			a.sub( b );
			assert.ok( a.x == 2 * x, "Passed!" );
			assert.ok( a.y == 2 * y, "Passed!" );

			var c = new Vector2().subVectors( a, a );
			assert.ok( c.x == 0, "Passed!" );
			assert.ok( c.y == 0, "Passed!" );

		} );

		QUnit.todo( "subScalar", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.todo( "subVectors", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.todo( "multiply", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.todo( "multiplyScalar", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.todo( "divide", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.todo( "divideScalar", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.test( "applyMatrix3", ( assert ) => {

			var a = new Vector2( x, y );
			var m = new Matrix3().set( 2, 3, 5, 7, 11, 13, 17, 19, 23 );

			a.applyMatrix3( m );
			assert.strictEqual( a.x, 18, "Check x" );
			assert.strictEqual( a.y, 60, "Check y" );

		} );

		QUnit.todo( "min", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.todo( "max", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.todo( "clamp", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.todo( "clampScalar", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.todo( "clampLength", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.todo( "floor", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.todo( "ceil", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.todo( "round", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.todo( "roundToZero", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.test( "negate", ( assert ) => {

			var a = new Vector2( x, y );

			a.negate();
			assert.ok( a.x == - x, "Passed!" );
			assert.ok( a.y == - y, "Passed!" );

		} );

		QUnit.test( "dot", ( assert ) => {

			var a = new Vector2( x, y );
			var b = new Vector2( - x, - y );
			var c = new Vector2();

			var result = a.dot( b );
			assert.ok( result == ( - x * x - y * y ), "Passed!" );

			var result = a.dot( c );
			assert.ok( result == 0, "Passed!" );

		} );

		QUnit.test( "cross", ( assert ) => {

			var a = new Vector2( x, y );
			var b = new Vector2( 2 * x, - y );
			var answer = - 18;
			var crossed = a.cross( b );

			assert.ok( Math.abs( answer - crossed ) <= eps, "Check cross" );

		} );

		QUnit.todo( "lengthSq", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.todo( "length", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.test( "manhattanLength", ( assert ) => {

			var a = new Vector2( x, 0 );
			var b = new Vector2( 0, - y );
			var c = new Vector2();

			assert.strictEqual( a.manhattanLength(), x, "Positive component" );
			assert.strictEqual( b.manhattanLength(), y, "Negative component" );
			assert.strictEqual( c.manhattanLength(), 0, "Empty component" );

			a.set( x, y );
			assert.strictEqual( a.manhattanLength(), Math.abs( x ) + Math.abs( y ), "Two components" );

		} );

		QUnit.test( "normalize", ( assert ) => {

			var a = new Vector2( x, 0 );
			var b = new Vector2( 0, - y );

			a.normalize();
			assert.ok( a.length() == 1, "Passed!" );
			assert.ok( a.x == 1, "Passed!" );

			b.normalize();
			assert.ok( b.length() == 1, "Passed!" );
			assert.ok( b.y == - 1, "Passed!" );

		} );

		QUnit.todo( "angle", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.todo( "distanceTo", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.todo( "distanceToSquared", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.todo( "manhattanDistanceTo", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.test( "setLength", ( assert ) => {

			var a = new Vector2( x, 0 );

			assert.ok( a.length() == x, "Passed!" );
			a.setLength( y );
			assert.ok( a.length() == y, "Passed!" );

			var a = new Vector2( 0, 0 );
			assert.ok( a.length() == 0, "Passed!" );
			a.setLength( y );
			assert.ok( a.length() == 0, "Passed!" );
			a.setLength();
			assert.ok( isNaN( a.length() ), "Passed!" );

		} );

		QUnit.todo( "lerp", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.todo( "lerpVectors", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.test( "equals", ( assert ) => {

			var a = new Vector2( x, 0 );
			var b = new Vector2( 0, - y );

			assert.ok( a.x != b.x, "Passed!" );
			assert.ok( a.y != b.y, "Passed!" );

			assert.ok( ! a.equals( b ), "Passed!" );
			assert.ok( ! b.equals( a ), "Passed!" );

			a.copy( b );
			assert.ok( a.x == b.x, "Passed!" );
			assert.ok( a.y == b.y, "Passed!" );

			assert.ok( a.equals( b ), "Passed!" );
			assert.ok( b.equals( a ), "Passed!" );

		} );

		QUnit.test( "fromArray", ( assert ) => {

			var a = new Vector2();
			var array = [ 1, 2, 3, 4 ];

			a.fromArray( array );
			assert.strictEqual( a.x, 1, "No offset: check x" );
			assert.strictEqual( a.y, 2, "No offset: check y" );

			a.fromArray( array, 2 );
			assert.strictEqual( a.x, 3, "With offset: check x" );
			assert.strictEqual( a.y, 4, "With offset: check y" );

		} );

		QUnit.test( "toArray", ( assert ) => {

			var a = new Vector2( x, y );

			var array = a.toArray();
			assert.strictEqual( array[ 0 ], x, "No array, no offset: check x" );
			assert.strictEqual( array[ 1 ], y, "No array, no offset: check y" );

			var array = [];
			a.toArray( array );
			assert.strictEqual( array[ 0 ], x, "With array, no offset: check x" );
			assert.strictEqual( array[ 1 ], y, "With array, no offset: check y" );

			var array = [];
			a.toArray( array, 1 );
			assert.strictEqual( array[ 0 ], undefined, "With array and offset: check [0]" );
			assert.strictEqual( array[ 1 ], x, "With array and offset: check x" );
			assert.strictEqual( array[ 2 ], y, "With array and offset: check y" );

		} );

		QUnit.test( "fromBufferAttribute", ( assert ) => {

			var a = new Vector2();
			var attr = new BufferAttribute( new Float32Array( [ 1, 2, 3, 4 ] ), 2 );

			a.fromBufferAttribute( attr, 0 );
			assert.strictEqual( a.x, 1, "Offset 0: check x" );
			assert.strictEqual( a.y, 2, "Offset 0: check y" );

			a.fromBufferAttribute( attr, 1 );
			assert.strictEqual( a.x, 3, "Offset 1: check x" );
			assert.strictEqual( a.y, 4, "Offset 1: check y" );

		} );

		QUnit.todo( "rotateAround", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );


		// TODO (Itee) refactor/split
		QUnit.test( "setX,setY", ( assert ) => {

			var a = new Vector2();
			assert.ok( a.x == 0, "Passed!" );
			assert.ok( a.y == 0, "Passed!" );

			a.setX( x );
			a.setY( y );
			assert.ok( a.x == x, "Passed!" );
			assert.ok( a.y == y, "Passed!" );

		} );
		QUnit.test( "setComponent,getComponent", ( assert ) => {

			var a = new Vector2();
			assert.ok( a.x == 0, "Passed!" );
			assert.ok( a.y == 0, "Passed!" );

			a.setComponent( 0, 1 );
			a.setComponent( 1, 2 );
			assert.ok( a.getComponent( 0 ) == 1, "Passed!" );
			assert.ok( a.getComponent( 1 ) == 2, "Passed!" );

		} );
		QUnit.test( "multiply/divide", ( assert ) => {

			var a = new Vector2( x, y );
			var b = new Vector2( - x, - y );

			a.multiplyScalar( - 2 );
			assert.ok( a.x == x * - 2, "Passed!" );
			assert.ok( a.y == y * - 2, "Passed!" );

			b.multiplyScalar( - 2 );
			assert.ok( b.x == 2 * x, "Passed!" );
			assert.ok( b.y == 2 * y, "Passed!" );

			a.divideScalar( - 2 );
			assert.ok( a.x == x, "Passed!" );
			assert.ok( a.y == y, "Passed!" );

			b.divideScalar( - 2 );
			assert.ok( b.x == - x, "Passed!" );
			assert.ok( b.y == - y, "Passed!" );

		} );
		QUnit.test( "min/max/clamp", ( assert ) => {

			var a = new Vector2( x, y );
			var b = new Vector2( - x, - y );
			var c = new Vector2();

			c.copy( a ).min( b );
			assert.ok( c.x == - x, "Passed!" );
			assert.ok( c.y == - y, "Passed!" );

			c.copy( a ).max( b );
			assert.ok( c.x == x, "Passed!" );
			assert.ok( c.y == y, "Passed!" );

			c.set( - 2 * x, 2 * y );
			c.clamp( b, a );
			assert.ok( c.x == - x, "Passed!" );
			assert.ok( c.y == y, "Passed!" );

			c.set( - 2 * x, 2 * x );
			c.clampScalar( - x, x );
			assert.equal( c.x, - x, "scalar clamp x" );
			assert.equal( c.y, x, "scalar clamp y" );

		} );
		QUnit.test( "rounding", ( assert ) => {

			assert.deepEqual( new Vector2( - 0.1, 0.1 ).floor(), new Vector2( - 1, 0 ), "floor .1" );
			assert.deepEqual( new Vector2( - 0.5, 0.5 ).floor(), new Vector2( - 1, 0 ), "floor .5" );
			assert.deepEqual( new Vector2( - 0.9, 0.9 ).floor(), new Vector2( - 1, 0 ), "floor .9" );

			assert.deepEqual( new Vector2( - 0.1, 0.1 ).ceil(), new Vector2( 0, 1 ), "ceil .1" );
			assert.deepEqual( new Vector2( - 0.5, 0.5 ).ceil(), new Vector2( 0, 1 ), "ceil .5" );
			assert.deepEqual( new Vector2( - 0.9, 0.9 ).ceil(), new Vector2( 0, 1 ), "ceil .9" );

			assert.deepEqual( new Vector2( - 0.1, 0.1 ).round(), new Vector2( 0, 0 ), "round .1" );
			assert.deepEqual( new Vector2( - 0.5, 0.5 ).round(), new Vector2( 0, 1 ), "round .5" );
			assert.deepEqual( new Vector2( - 0.9, 0.9 ).round(), new Vector2( - 1, 1 ), "round .9" );

			assert.deepEqual( new Vector2( - 0.1, 0.1 ).roundToZero(), new Vector2( 0, 0 ), "roundToZero .1" );
			assert.deepEqual( new Vector2( - 0.5, 0.5 ).roundToZero(), new Vector2( 0, 0 ), "roundToZero .5" );
			assert.deepEqual( new Vector2( - 0.9, 0.9 ).roundToZero(), new Vector2( 0, 0 ), "roundToZero .9" );
			assert.deepEqual( new Vector2( - 1.1, 1.1 ).roundToZero(), new Vector2( - 1, 1 ), "roundToZero 1.1" );
			assert.deepEqual( new Vector2( - 1.5, 1.5 ).roundToZero(), new Vector2( - 1, 1 ), "roundToZero 1.5" );
			assert.deepEqual( new Vector2( - 1.9, 1.9 ).roundToZero(), new Vector2( - 1, 1 ), "roundToZero 1.9" );

		} );
		QUnit.test( "length/lengthSq", ( assert ) => {

			var a = new Vector2( x, 0 );
			var b = new Vector2( 0, - y );
			var c = new Vector2();

			assert.ok( a.length() == x, "Passed!" );
			assert.ok( a.lengthSq() == x * x, "Passed!" );
			assert.ok( b.length() == y, "Passed!" );
			assert.ok( b.lengthSq() == y * y, "Passed!" );
			assert.ok( c.length() == 0, "Passed!" );
			assert.ok( c.lengthSq() == 0, "Passed!" );

			a.set( x, y );
			assert.ok( a.length() == Math.sqrt( x * x + y * y ), "Passed!" );
			assert.ok( a.lengthSq() == ( x * x + y * y ), "Passed!" );

		} );
		QUnit.test( "distanceTo/distanceToSquared", ( assert ) => {

			var a = new Vector2( x, 0 );
			var b = new Vector2( 0, - y );
			var c = new Vector2();

			assert.ok( a.distanceTo( c ) == x, "Passed!" );
			assert.ok( a.distanceToSquared( c ) == x * x, "Passed!" );

			assert.ok( b.distanceTo( c ) == y, "Passed!" );
			assert.ok( b.distanceToSquared( c ) == y * y, "Passed!" );

		} );
		QUnit.test( "lerp/clone", ( assert ) => {

			var a = new Vector2( x, 0 );
			var b = new Vector2( 0, - y );

			assert.ok( a.lerp( a, 0 ).equals( a.lerp( a, 0.5 ) ), "Passed!" );
			assert.ok( a.lerp( a, 0 ).equals( a.lerp( a, 1 ) ), "Passed!" );

			assert.ok( a.clone().lerp( b, 0 ).equals( a ), "Passed!" );

			assert.ok( a.clone().lerp( b, 0.5 ).x == x * 0.5, "Passed!" );
			assert.ok( a.clone().lerp( b, 0.5 ).y == - y * 0.5, "Passed!" );

			assert.ok( a.clone().lerp( b, 1 ).equals( b ), "Passed!" );

		} );
		QUnit.test( "setComponent/getComponent exceptions", ( assert ) => {

			var a = new Vector2( 0, 0 );

			assert.throws(
				function () {

					a.setComponent( 2, 0 );

				},
				/index is out of range/,
				"setComponent with an out of range index throws Error"
			);
			assert.throws(
				function () {

					a.getComponent( 2 );

				},
				/index is out of range/,
				"getComponent with an out of range index throws Error"
			);

		} );
		QUnit.test( "setScalar/addScalar/subScalar", ( assert ) => {

			var a = new Vector2( 1, 1 );
			var s = 3;

			a.setScalar( s );
			assert.strictEqual( a.x, s, "setScalar: check x" );
			assert.strictEqual( a.y, s, "setScalar: check y" );

			a.addScalar( s );
			assert.strictEqual( a.x, 2 * s, "addScalar: check x" );
			assert.strictEqual( a.y, 2 * s, "addScalar: check y" );

			a.subScalar( 2 * s );
			assert.strictEqual( a.x, 0, "subScalar: check x" );
			assert.strictEqual( a.y, 0, "subScalar: check y" );

		} );
		QUnit.test( "multiply/divide", ( assert ) => {

			var a = new Vector2( x, y );
			var b = new Vector2( 2 * x, 2 * y );
			var c = new Vector2( 4 * x, 4 * y );

			a.multiply( b );
			assert.strictEqual( a.x, x * b.x, "multiply: check x" );
			assert.strictEqual( a.y, y * b.y, "multiply: check y" );

			b.divide( c );
			assert.strictEqual( b.x, 0.5, "divide: check x" );
			assert.strictEqual( b.y, 0.5, "divide: check y" );

		} );

	} );

} );
