import { Cartesian2 } from "../../Source/Cesium.js";
import { Cartesian3 } from "../../Source/Cesium.js";
import { Color } from "../../Source/Cesium.js";
import { Matrix4 } from "../../Source/Cesium.js";
import { Resource } from "../../Source/Cesium.js";
import { CircleEmitter } from "../../Source/Cesium.js";
import { ParticleBurst } from "../../Source/Cesium.js";
import { ParticleSystem } from "../../Source/Cesium.js";
import createScene from "../createScene.js";

describe("Scene/ParticleSystem", function () {
  var scene;
  var greenImage;

  beforeAll(function () {
    scene = createScene();
    return Resource.fetchImage("./Data/Images/Green2x2.png").then(function (
      result
    ) {
      greenImage = result;
    });
  });

  afterAll(function () {
    scene.destroyForSpecs();
  });

  it("default constructor", function () {
    var p = new ParticleSystem();
    expect(p.show).toEqual(true);
    expect(p.forces).toBeUndefined();
    expect(p.emitter).toBeDefined();
    expect(p.modelMatrix).toEqual(Matrix4.IDENTITY);
    expect(p.emitterModelMatrix).toEqual(Matrix4.IDENTITY);
    expect(p.startColor).toEqual(Color.WHITE);
    expect(p.endColor).toEqual(Color.WHITE);
    expect(p.startScale).toEqual(1.0);
    expect(p.endScale).toEqual(1.0);
    expect(p.emissionRate).toEqual(5.0);
    expect(p.bursts).toBeUndefined();
    expect(p.loop).toEqual(true);
    expect(p.minimumSpeed).toEqual(1.0);
    expect(p.maximumSpeed).toEqual(1.0);
    expect(p.minimumParticleLife).toEqual(5.0);
    expect(p.maximumParticleLife).toEqual(5.0);
    expect(p.minimumMass).toEqual(1.0);
    expect(p.maximumMass).toEqual(1.0);
    expect(p.image).toBeUndefined();
    expect(p.minimumImageSize.x).toEqual(1.0);
    expect(p.minimumImageSize.y).toEqual(1.0);
    expect(p.maximumImageSize.x).toEqual(1.0);
    expect(p.maximumImageSize.y).toEqual(1.0);
    expect(p.lifetime).toEqual(Number.MAX_VALUE);
    expect(p.complete).toBeDefined();
    expect(p.isComplete).toEqual(false);
    expect(p.sizeInMeters).toEqual(false);
  });

  it("constructor", function () {
    var options = {
      show: false,
      updateCallback: function (p) {
        p.mass++;
      },
      emitter: new CircleEmitter(10.0),
      modelMatrix: new Matrix4(1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0),
      emitterModelMatrix: new Matrix4(
        10.0,
        11.0,
        12.0,
        13.0,
        14.0,
        15.0,
        16.0,
        17.0,
        18.0
      ),
      startColor: Color.MAGENTA,
      endColor: Color.LAVENDAR_BLUSH,
      startScale: 19.0,
      endScale: 20.0,
      emissionRate: 21.0,
      bursts: [new ParticleBurst()],
      loop: false,
      minimumSpeed: 22.0,
      maximumSpeed: 23.0,
      minimumParticleLife: 24.0,
      maximumParticleLife: 25.0,
      minimumMass: 26.0,
      maximumMass: 27.0,
      image: "url/to/image",
      minimumImageSize: new Cartesian2(28.0, 30.0),
      maximumImageSize: new Cartesian2(29.0, 31.0),
      lifetime: 32.0,
      sizeInMeters: true,
    };
    var p = new ParticleSystem(options);
    expect(p.show).toEqual(options.show);
    expect(p.updateCallback).toEqual(options.updateCallback);
    expect(p.emitter).toEqual(options.emitter);
    expect(p.modelMatrix).toEqual(options.modelMatrix);
    expect(p.emitterModelMatrix).toEqual(options.emitterModelMatrix);
    expect(p.startColor).toEqual(options.startColor);
    expect(p.endColor).toEqual(options.endColor);
    expect(p.startScale).toEqual(options.startScale);
    expect(p.endScale).toEqual(options.endScale);
    expect(p.emissionRate).toEqual(options.emissionRate);
    expect(p.bursts).toEqual(options.bursts);
    expect(p.loop).toEqual(options.loop);
    expect(p.minimumSpeed).toEqual(options.minimumSpeed);
    expect(p.maximumSpeed).toEqual(options.maximumSpeed);
    expect(p.minimumParticleLife).toEqual(options.minimumParticleLife);
    expect(p.maximumParticleLife).toEqual(options.maximumParticleLife);
    expect(p.minimumMass).toEqual(options.minimumMass);
    expect(p.maximumMass).toEqual(options.maximumMass);
    expect(p.image).toEqual(options.image);
    expect(p.minimumImageSize).toEqual(options.minimumImageSize);
    expect(p.maximumImageSize).toEqual(options.maximumImageSize);
    expect(p.lifetime).toEqual(options.lifetime);
    expect(p.complete).toBeDefined();
    expect(p.isComplete).toEqual(false);
    expect(p.sizeInMeters).toEqual(true);
  });

  it("getters/setters", function () {
    var show = false;
    var forces = [
      function (p) {
        p.mass++;
      },
    ];
    var emitter = new CircleEmitter(10.0);
    var modelMatrix = new Matrix4(1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0);
    var emitterModelMatrix = new Matrix4(
      10.0,
      11.0,
      12.0,
      13.0,
      14.0,
      15.0,
      16.0,
      17.0,
      18.0
    );
    var startColor = Color.MAGENTA;
    var endColor = Color.LAVENDAR_BLUSH;
    var startScale = 19.0;
    var endScale = 20.0;
    var emissionRate = 21.0;
    var bursts = [new ParticleBurst()];
    var loop = false;
    var minimumSpeed = 22.0;
    var maximumSpeed = 23.0;
    var minimumParticleLife = 24.0;
    var maximumParticleLife = 25.0;
    var minimumMass = 26.0;
    var maximumMass = 27.0;
    var image = "url/to/image";
    var minimumImageSize = new Cartesian2(28.0, 30.0);
    var maximumImageSize = new Cartesian2(29.0, 31.0);
    var lifetime = 32.0;
    var sizeInMeters = true;

    var p = new ParticleSystem();
    p.show = show;
    p.forces = forces;
    p.emitter = emitter;
    p.modelMatrix = modelMatrix;
    p.emitterModelMatrix = emitterModelMatrix;
    p.startColor = startColor;
    p.endColor = endColor;
    p.startScale = startScale;
    p.endScale = endScale;
    p.emissionRate = emissionRate;
    p.bursts = bursts;
    p.loop = loop;
    p.minimumSpeed = minimumSpeed;
    p.maximumSpeed = maximumSpeed;
    p.minimumParticleLife = minimumParticleLife;
    p.maximumParticleLife = maximumParticleLife;
    p.minimumMass = minimumMass;
    p.maximumMass = maximumMass;
    p.image = image;
    p.minimumImageSize = Cartesian2.clone(minimumImageSize, new Cartesian2());
    p.maximumImageSize = Cartesian2.clone(maximumImageSize, new Cartesian2());
    p.lifetime = lifetime;
    p.sizeInMeters = sizeInMeters;

    expect(p.show).toEqual(show);
    expect(p.forces).toEqual(forces);
    expect(p.emitter).toEqual(emitter);
    expect(p.modelMatrix).toEqual(modelMatrix);
    expect(p.emitterModelMatrix).toEqual(emitterModelMatrix);
    expect(p.startColor).toEqual(startColor);
    expect(p.endColor).toEqual(endColor);
    expect(p.startScale).toEqual(startScale);
    expect(p.endScale).toEqual(endScale);
    expect(p.emissionRate).toEqual(emissionRate);
    expect(p.bursts).toEqual(bursts);
    expect(p.loop).toEqual(loop);
    expect(p.minimumSpeed).toEqual(minimumSpeed);
    expect(p.maximumSpeed).toEqual(maximumSpeed);
    expect(p.minimumParticleLife).toEqual(minimumParticleLife);
    expect(p.maximumParticleLife).toEqual(maximumParticleLife);
    expect(p.minimumMass).toEqual(minimumMass);
    expect(p.maximumMass).toEqual(maximumMass);
    expect(p.image).toEqual(image);
    expect(p.minimumImageSize).toEqual(minimumImageSize);
    expect(p.maximumImageSize).toEqual(maximumImageSize);
    expect(p.lifetime).toEqual(lifetime);
    expect(p.complete).toBeDefined();
    expect(p.isComplete).toEqual(false);
    expect(p.sizeInMeters).toEqual(sizeInMeters);
  });

  it("throws with invalid emitter", function () {
    var p = new ParticleSystem();
    expect(function () {
      p.emitter = undefined;
    }).toThrowDeveloperError();
  });

  it("throws with invalid modelMatrix", function () {
    var p = new ParticleSystem();
    expect(function () {
      p.modelMatrix = undefined;
    }).toThrowDeveloperError();
  });

  it("throws with invalid emitterModelMatrix", function () {
    var p = new ParticleSystem();
    expect(function () {
      p.emitterModelMatrix = undefined;
    }).toThrowDeveloperError();
  });

  it("throws with invalid startColor", function () {
    var p = new ParticleSystem();
    expect(function () {
      p.startColor = undefined;
    }).toThrowDeveloperError();
  });

  it("throws with invalid endColor", function () {
    var p = new ParticleSystem();
    expect(function () {
      p.endColor = undefined;
    }).toThrowDeveloperError();
  });

  it("throws with invalid startScale", function () {
    var p = new ParticleSystem();
    expect(function () {
      p.startScale = -1.0;
    }).toThrowDeveloperError();
  });

  it("throws with invalid endScale", function () {
    var p = new ParticleSystem();
    expect(function () {
      p.endScale = -1.0;
    }).toThrowDeveloperError();
  });

  it("throws with invalid emissionRate", function () {
    var p = new ParticleSystem();
    expect(function () {
      p.emissionRate = -1.0;
    }).toThrowDeveloperError();
  });

  it("throws with invalid minimumSpeed", function () {
    var p = new ParticleSystem();
    expect(function () {
      p.minimumSpeed = -1.0;
    }).toThrowDeveloperError();
  });

  it("throws with invalid maximumSpeed", function () {
    var p = new ParticleSystem();
    expect(function () {
      p.maximumSpeed = -1.0;
    }).toThrowDeveloperError();
  });

  it("throws with invalid minimumParticleLife", function () {
    var p = new ParticleSystem();
    expect(function () {
      p.minimumParticleLife = -1.0;
    }).toThrowDeveloperError();
  });

  it("throws with invalid maximumParticleLife", function () {
    var p = new ParticleSystem();
    expect(function () {
      p.maximumParticleLife = -1.0;
    }).toThrowDeveloperError();
  });

  it("throws with invalid minimumMass", function () {
    var p = new ParticleSystem();
    expect(function () {
      p.minimumMass = -1.0;
    }).toThrowDeveloperError();
  });

  it("throws with invalid maximumMass", function () {
    var p = new ParticleSystem();
    expect(function () {
      p.maximumMass = -1.0;
    }).toThrowDeveloperError();
  });

  it("throws with invalid minimumWidth", function () {
    var p = new ParticleSystem();
    expect(function () {
      p.minimumImageSize = new Cartesian2(-1.0, 2.0);
    }).toThrowDeveloperError();
  });

  it("throws with invalid maximumWidth", function () {
    var p = new ParticleSystem();
    expect(function () {
      p.maximumImageSize = new Cartesian2(-1.0, 2.0);
    }).toThrowDeveloperError();
  });

  it("throws with invalid minimumHeight", function () {
    var p = new ParticleSystem();
    expect(function () {
      p.minimumImageSize = new Cartesian2(2.0, -1.0);
    }).toThrowDeveloperError();
  });

  it("throws with invalid maximumHeight", function () {
    var p = new ParticleSystem();
    expect(function () {
      p.maximumImageSize = new Cartesian2(2.0, -1.0);
    }).toThrowDeveloperError();
  });

  it("throws with invalid lifetime", function () {
    var p = new ParticleSystem();
    expect(function () {
      p.lifetime = -1.0;
    }).toThrowDeveloperError();
  });

  it("clones default image size", function () {
    var p = new ParticleSystem();
    expect(p.maximumImageSize).not.toBe(p.minimumImageSize);
  });

  it("renders", function () {
    scene.primitives.add(
      new ParticleSystem({
        image: greenImage,
        emitter: new CircleEmitter(1.0),
        emissoinRate: 10000,
        imageSize: new Cartesian2(100, 100),
      })
    );
    scene.camera.position = new Cartesian3(0.0, 0.0, 20.0);
    scene.camera.direction = new Cartesian3(0.0, 0.0, -1.0);
    scene.camera.up = Cartesian3.clone(Cartesian3.UNIT_Y);
    scene.camera.right = Cartesian3.clone(Cartesian3.UNIT_X);

    // no particles emitted at time 0
    scene.renderForSpecs();
    // billboard collection needs to create texture atlas
    scene.renderForSpecs();
    // finally render
    expect(scene).toRender([0, 255, 0, 255]);
  });

  it("isDestroyed", function () {
    var p = new ParticleSystem();
    expect(p.isDestroyed()).toEqual(false);
    p.destroy();
    expect(p.isDestroyed()).toEqual(true);
  });
});