import {
  Vec4,
  vec4Add,
  vec4Dot,
  vec4FromArray,
  vec4Length,
  vec4Negate,
  vec4Normalize,
  vec4Parse,
  vec4Scale,
  vec4Subtract,
  vec4ToArray,
  vec4ToString
} from './Vec4.js';

describe('vec4 value type', () => {
  test('constructor', () => {
    const value = new Vec4(1, 2, 3, 4);
    expect(value.x).toEqual(1);
    expect(value.y).toEqual(2);
    expect(value.z).toEqual(3);
    expect(value.w).toEqual(4);
  });
  test('add', () => {
    const value = vec4Add(new Vec4(1, 2, 3, 4), new Vec4(3, 4, 5, 6));
    expect(value.x).toEqual(4);
    expect(value.y).toEqual(6);
    expect(value.z).toEqual(8);
    expect(value.w).toEqual(10);
  });
  test('subtract', () => {
    const value = vec4Subtract(new Vec4(1, 2, 3, 4), new Vec4(3, 8, 13, 18));
    expect(value.x).toEqual(-2);
    expect(value.y).toEqual(-6);
    expect(value.z).toEqual(-10);
    expect(value.w).toEqual(-14);
  });
  test('scale', () => {
    const value = vec4Scale(new Vec4(1, 2, 3, 4), 2);
    expect(value.x).toEqual(2);
    expect(value.y).toEqual(4);
    expect(value.z).toEqual(6);
    expect(value.w).toEqual(8);
  });
  test('negate', () => {
    const value = vec4Negate(new Vec4(1, 2, 3, 4));
    expect(value.x).toEqual(-1);
    expect(value.y).toEqual(-2);
    expect(value.z).toEqual(-3);
    expect(value.w).toEqual(-4);
  });
  test('length', () => {
    const value = vec4Length(new Vec4(1, 2, 3, 4));
    expect(value).toEqual(Math.sqrt(1 + 2 * 2 + 3 * 3 + 4 * 4));
  });
  test('normalize', () => {
    const value = vec4Normalize(new Vec4(0, 0, 0, 2));
    expect(value.x).toEqual(0);
    expect(value.y).toEqual(0);
    expect(value.z).toEqual(0);
    expect(value.w).toEqual(1);
  });
  test('dot', () => {
    const value = vec4Dot(new Vec4(0, 2, 1, 3), new Vec4(3, 4, 1, 1));
    expect(value).toEqual(12);
  });
  test('fromArray', () => {
    const value = vec4FromArray([1, 2, 3, 4, 5], 1);
    expect(value.x).toEqual(2);
    expect(value.y).toEqual(3);
    expect(value.z).toEqual(4);
    expect(value.w).toEqual(5);
  });
  test('fromArray', () => {
    const array = [1, 2, 3];
    vec4ToArray(new Vec4(6, 7, 8, 9), array, 1);
    expect(array[1]).toEqual(6);
    expect(array[2]).toEqual(7);
    expect(array[3]).toEqual(8);
    expect(array[4]).toEqual(9);
  });
  test('toString/parser', () => {
    const v = new Vec4(10, 5.5, -9, 99999);
    const text = vec4ToString(v);
    const v2 = vec4Parse(text);
    expect(v.x).toEqual(v2.x);
    expect(v.y).toEqual(v2.y);
    expect(v.z).toEqual(v2.z);
  });
});