import { Cartesian2 } from "../../Source/Cesium.js";
import { combine } from "../../Source/Cesium.js";
import { FeatureDetection } from "../../Source/Cesium.js";
import { KeyboardEventModifier } from "../../Source/Cesium.js";
import { CameraEventAggregator } from "../../Source/Cesium.js";
import { CameraEventType } from "../../Source/Cesium.js";
import createCanvas from "../createCanvas.js";
import DomEventSimulator from "../DomEventSimulator.js";

describe("Scene/CameraEventAggregator", function () {
  var usePointerEvents;
  var canvas;
  var handler;
  var handler2;

  beforeAll(function () {
    usePointerEvents = FeatureDetection.supportsPointerEvents();
    canvas = createCanvas(1024, 768);
  });

  afterAll(function () {
    document.body.removeChild(canvas);
  });

  beforeEach(function () {
    handler = new CameraEventAggregator(canvas);
  });

  afterEach(function () {
    handler = handler && !handler.isDestroyed() && handler.destroy();
    handler2 = handler2 && !handler2.isDestroyed() && handler2.destroy();
  });

  var MouseButtons = {
    LEFT: 0,
    MIDDLE: 1,
    RIGHT: 2,
  };

  function simulateMouseDown(options) {
    if (usePointerEvents) {
      DomEventSimulator.firePointerDown(
        canvas,
        combine(options, {
          pointerType: "mouse",
        })
      );
    } else {
      DomEventSimulator.fireMouseDown(canvas, options);
    }
  }

  function simulateMouseUp(options) {
    if (usePointerEvents) {
      DomEventSimulator.firePointerUp(
        canvas,
        combine(options, {
          pointerType: "mouse",
        })
      );
    } else {
      DomEventSimulator.fireMouseUp(canvas, options);
    }
  }

  function simulateMouseMove(options) {
    if (usePointerEvents) {
      DomEventSimulator.firePointerMove(
        canvas,
        combine(options, {
          pointerType: "mouse",
        })
      );
    } else {
      DomEventSimulator.fireMouseMove(canvas, options);
    }
  }

  function moveMouse(button, startPosition, endPosition, shiftKey) {
    var canvasRect = canvas.getBoundingClientRect();

    var options = {
      button: button,
      clientX: startPosition.x + canvasRect.left,
      clientY: startPosition.y + canvasRect.top,
      shiftKey: shiftKey,
    };
    simulateMouseDown(options);
    options.clientX = endPosition.x + canvasRect.left;
    options.clientY = endPosition.y + canvasRect.top;
    simulateMouseMove(options);
    simulateMouseUp(options);
  }

  it("throws without a canvas", function () {
    expect(function () {
      handler2 = new CameraEventAggregator();
    }).toThrowDeveloperError();
  });

  it("getMovement throws without a type", function () {
    expect(function () {
      handler.getMovement();
    }).toThrowDeveloperError();
  });

  it("isMoving throws without a type", function () {
    expect(function () {
      handler.isMoving();
    }).toThrowDeveloperError();
  });

  it("isButtonDown throws without a type", function () {
    expect(function () {
      handler.isButtonDown();
    }).toThrowDeveloperError();
  });

  it("getButtonPressTime throws without a type", function () {
    expect(function () {
      handler.getButtonPressTime();
    }).toThrowDeveloperError();
  });

  it("getButtonReleaseTime throws without a type", function () {
    expect(function () {
      handler.getButtonReleaseTime();
    }).toThrowDeveloperError();
  });

  it("getMovement", function () {
    var startPosition = Cartesian2.ZERO;
    var endPosition = Cartesian2.UNIT_X;

    moveMouse(MouseButtons.LEFT, startPosition, endPosition);
    var movement = handler.getMovement(CameraEventType.LEFT_DRAG);
    expect(movement).toBeDefined();
    expect(movement.startPosition).toEqual(startPosition);
    expect(movement.endPosition).toEqual(endPosition);

    moveMouse(MouseButtons.RIGHT, startPosition, endPosition, true);
    movement = handler.getMovement(
      CameraEventType.RIGHT_DRAG,
      KeyboardEventModifier.SHIFT
    );
    expect(movement).toBeDefined();
    expect(movement.startPosition).toEqual(startPosition);
    expect(movement.endPosition).toEqual(endPosition);
  });

  it("getLastMovement", function () {
    expect(handler.getLastMovement(CameraEventType.LEFT_DRAG)).toBeUndefined();
    var startPosition = Cartesian2.ZERO;
    var endPosition = Cartesian2.UNIT_X;
    var endPosition2 = Cartesian2.UNIT_Y;

    var canvasRect = canvas.getBoundingClientRect();

    var options = {
      button: MouseButtons.LEFT,
      clientX: startPosition.x + canvasRect.left,
      clientY: startPosition.y + canvasRect.top,
    };
    simulateMouseDown(options);
    options.clientX = endPosition.x + canvasRect.left;
    options.clientY = endPosition.y + canvasRect.top;
    simulateMouseMove(options);
    handler.reset();
    options.clientX = endPosition2.x + canvasRect.left;
    options.clientY = endPosition2.y + canvasRect.top;
    simulateMouseMove(options);

    var movement = handler.getLastMovement(CameraEventType.LEFT_DRAG);
    expect(movement).toBeDefined();
    expect(movement.startPosition).toEqual(startPosition);
    expect(movement.endPosition).toEqual(endPosition);
  });

  it("isMoving", function () {
    expect(handler.isMoving(CameraEventType.LEFT_DRAG)).toEqual(false);
    var startPosition = Cartesian2.ZERO;
    var endPosition = Cartesian2.UNIT_X;

    moveMouse(MouseButtons.LEFT, startPosition, endPosition);
    expect(handler.isMoving(CameraEventType.LEFT_DRAG)).toEqual(true);
    handler.reset();
    expect(handler.isMoving(CameraEventType.LEFT_DRAG)).toEqual(false);
  });

  it("isButtonDown", function () {
    expect(handler.isButtonDown(CameraEventType.LEFT_DRAG)).toEqual(false);

    var options = {
      button: MouseButtons.LEFT,
      clientX: 0,
      clientY: 0,
    };
    simulateMouseDown(options);

    expect(handler.isButtonDown(CameraEventType.LEFT_DRAG)).toEqual(true);
    simulateMouseUp(options);
    expect(handler.isButtonDown(CameraEventType.LEFT_DRAG)).toEqual(false);
  });

  it("anyButtonDown", function () {
    expect(handler.anyButtonDown).toEqual(false);

    var options = {
      button: MouseButtons.LEFT,
      clientX: 0,
      clientY: 0,
    };
    simulateMouseDown(options);
    expect(handler.anyButtonDown).toEqual(true);

    options.button = MouseButtons.RIGHT;
    simulateMouseDown(options);
    expect(handler.anyButtonDown).toEqual(true);

    simulateMouseUp(options);

    options.button = MouseButtons.LEFT;
    simulateMouseUp(options);

    expect(handler.anyButtonDown).toEqual(false);
  });

  it("cancels anyButtonDown on any button up", function () {
    expect(handler.anyButtonDown).toEqual(false);

    var options = {
      button: MouseButtons.LEFT,
      clientX: 0,
      clientY: 0,
    };
    simulateMouseDown(options);

    options.button = MouseButtons.RIGHT;
    simulateMouseDown(options);

    simulateMouseUp(options);

    expect(handler.anyButtonDown).toEqual(false);
  });

  it("getButtonPressTime", function () {
    expect(
      handler.getButtonPressTime(CameraEventType.LEFT_DRAG)
    ).toBeUndefined();

    var options = {
      button: MouseButtons.LEFT,
      clientX: 0,
      clientY: 0,
    };
    var before = new Date();
    simulateMouseDown(options);
    var after = new Date();

    var downTime = handler.getButtonPressTime(CameraEventType.LEFT_DRAG);
    expect(downTime).toBeDefined();
    expect(downTime.getTime()).toBeGreaterThanOrEqualTo(before.getTime());
    expect(downTime.getTime()).toBeLessThanOrEqualTo(after.getTime());
  });

  it("getButtonReleaseTime", function () {
    expect(
      handler.getButtonReleaseTime(CameraEventType.LEFT_DRAG)
    ).toBeUndefined();

    var options = {
      button: MouseButtons.LEFT,
      clientX: 0,
      clientY: 0,
    };
    simulateMouseDown(options);
    var before = new Date();
    simulateMouseUp(options);
    var after = new Date();

    var upTime = handler.getButtonReleaseTime(CameraEventType.LEFT_DRAG);
    expect(upTime).toBeDefined();
    expect(upTime.getTime()).toBeGreaterThanOrEqualTo(before.getTime());
    expect(upTime.getTime()).toBeLessThanOrEqualTo(after.getTime());
  });

  it("aggregates events", function () {
    var startPosition = Cartesian2.ZERO;
    var endPosition = Cartesian2.UNIT_X;
    var endPosition2 = Cartesian2.UNIT_Y;

    var canvasRect = canvas.getBoundingClientRect();

    var options = {
      button: MouseButtons.LEFT,
      clientX: startPosition.x + canvasRect.left,
      clientY: startPosition.y + canvasRect.top,
    };
    simulateMouseDown(options);
    options.clientX = endPosition.x + canvasRect.left;
    options.clientY = endPosition.y + canvasRect.top;
    simulateMouseMove(options);
    options.clientX = endPosition2.x + canvasRect.left;
    options.clientY = endPosition2.y + canvasRect.top;
    simulateMouseMove(options);

    var movement = handler.getMovement(CameraEventType.LEFT_DRAG);
    expect(movement).toBeDefined();
    expect(movement.startPosition).toEqual(startPosition);
    expect(movement.endPosition).toEqual(endPosition2);
  });

  it("isDestroyed", function () {
    expect(handler.isDestroyed()).toEqual(false);
    handler.destroy();
    expect(handler.isDestroyed()).toEqual(true);
  });
});