import { Cartesian2 } from "../../Source/Cesium.js";
import { clone } from "../../Source/Cesium.js";
import { combine } from "../../Source/Cesium.js";
import { defined } from "../../Source/Cesium.js";
import { FeatureDetection } from "../../Source/Cesium.js";
import { KeyboardEventModifier } from "../../Source/Cesium.js";
import { ScreenSpaceEventHandler } from "../../Source/Cesium.js";
import { ScreenSpaceEventType } from "../../Source/Cesium.js";
import DomEventSimulator from "../DomEventSimulator.js";

describe("Core/ScreenSpaceEventHandler", function () {
  var usePointerEvents;
  var element;
  var handler;

  function createCloningSpy(name) {
    var spy = jasmine.createSpy(name);

    var cloningSpy = function () {
      // deep clone arguments so they are captured correctly by the spy
      var args = [].slice.apply(arguments).map(function (arg) {
        return clone(arg, true);
      });

      spy.apply(this, args);
    };

    function createPropertyDescriptor(prop) {
      return {
        get: function () {
          return spy[prop];
        },
        set: function (value) {
          spy[prop] = value;
        },
      };
    }

    for (var prop in spy) {
      if (spy.hasOwnProperty(prop)) {
        Object.defineProperty(cloningSpy, prop, createPropertyDescriptor(prop));
      }
    }

    return cloningSpy;
  }

  var eventsToStop = "pointerdown pointerup pointermove pointercancel mousedown mouseup mousemove touchstart touchend touchmove touchcancel dblclick wheel mousewheel DOMMouseScroll".split(
    " "
  );

  function stop(event) {
    event.stopPropagation();
    event.preventDefault();
  }

  beforeAll(function () {
    usePointerEvents = FeatureDetection.supportsPointerEvents();
  });

  beforeEach(function () {
    // ignore events that bubble up to the document.
    // this prevents triggering the browser's "middle click to scroll" behavior
    eventsToStop.forEach(function (e) {
      document.addEventListener(e, stop, false);
    });

    element = document.createElement("div");
    element.style.position = "absolute";
    element.style.top = "0";
    element.style.left = "0";
    document.body.appendChild(element);
    element.disableRootEvents = true;

    if (usePointerEvents) {
      spyOn(element, "setPointerCapture");
    }

    handler = new ScreenSpaceEventHandler(element);
  });

  afterEach(function () {
    document.body.removeChild(element);
    handler = !handler.isDestroyed() && handler.destroy();

    eventsToStop.forEach(function (e) {
      document.removeEventListener(e, stop, false);
    });
  });

  describe("setInputAction", function () {
    it("throws if action is undefined", function () {
      expect(function () {
        handler.setInputAction();
      }).toThrowDeveloperError();
    });

    it("throws if type is undefined", function () {
      expect(function () {
        handler.setInputAction(function () {});
      }).toThrowDeveloperError();
    });
  });

  describe("getInputAction", function () {
    it("throws if type is undefined", function () {
      expect(function () {
        handler.getInputAction();
      }).toThrowDeveloperError();
    });
  });

  describe("removeInputAction", function () {
    it("throws if type is undefined", function () {
      expect(function () {
        handler.removeInputAction();
      }).toThrowDeveloperError();
    });
  });

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

  function keyForValue(obj, val) {
    for (var key in obj) {
      if (obj[key] === val) {
        return key;
      }
    }
  }

  function createMouseSpec(specFunction, eventType, button, modifier) {
    var specName = keyForValue(ScreenSpaceEventType, eventType) + " action";
    if (defined(modifier)) {
      specName +=
        " with " + keyForValue(KeyboardEventModifier, modifier) + " modifier";
    }
    it(specName, function () {
      var eventOptions = {
        button: button,
        ctrlKey: modifier === KeyboardEventModifier.CTRL,
        altKey: modifier === KeyboardEventModifier.ALT,
        shiftKey: modifier === KeyboardEventModifier.SHIFT,
      };
      specFunction(eventType, modifier, eventOptions);
    });
  }

  function createAllMouseSpecCombinations(
    specFunction,
    possibleButtons,
    possibleModifiers,
    possibleEventTypes
  ) {
    for (var i = 0; i < possibleButtons.length; ++i) {
      var eventType = possibleEventTypes[i];
      var button = possibleButtons[i];
      for (var j = 0; j < possibleModifiers.length; ++j) {
        var modifier = possibleModifiers[j];
        createMouseSpec(specFunction, eventType, button, modifier);
      }
    }
  }

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

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

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

  describe("handles mouse down", function () {
    function testMouseDownEvent(eventType, modifier, eventOptions) {
      var action = createCloningSpy("action");
      handler.setInputAction(action, eventType, modifier);

      expect(handler.getInputAction(eventType, modifier)).toEqual(action);

      function simulateInput() {
        simulateMouseDown(
          element,
          combine(
            {
              clientX: 1,
              clientY: 2,
            },
            eventOptions
          )
        );
      }

      simulateInput();

      expect(action.calls.count()).toEqual(1);
      expect(action).toHaveBeenCalledWith({
        position: new Cartesian2(1, 2),
      });

      // should not be fired after removal
      action.calls.reset();

      handler.removeInputAction(eventType, modifier);

      simulateInput();

      expect(action).not.toHaveBeenCalled();
    }

    var possibleButtons = [
      MouseButton.LEFT,
      MouseButton.MIDDLE,
      MouseButton.RIGHT,
    ];
    var possibleModifiers = [
      undefined,
      KeyboardEventModifier.SHIFT,
      KeyboardEventModifier.CTRL,
      KeyboardEventModifier.ALT,
    ];
    var possibleEventTypes = [
      ScreenSpaceEventType.LEFT_DOWN,
      ScreenSpaceEventType.MIDDLE_DOWN,
      ScreenSpaceEventType.RIGHT_DOWN,
    ];
    createAllMouseSpecCombinations(
      testMouseDownEvent,
      possibleButtons,
      possibleModifiers,
      possibleEventTypes
    );
  });

  describe("handles mouse up", function () {
    function testMouseUpEvent(eventType, modifier, eventOptions) {
      var action = createCloningSpy("action");
      handler.setInputAction(action, eventType, modifier);

      expect(handler.getInputAction(eventType, modifier)).toEqual(action);

      // down, then up
      function simulateInput() {
        simulateMouseDown(
          element,
          combine(
            {
              clientX: 1,
              clientY: 2,
            },
            eventOptions
          )
        );
        simulateMouseUp(
          element,
          combine(
            {
              clientX: 1,
              clientY: 2,
            },
            eventOptions
          )
        );
      }

      simulateInput();

      expect(action.calls.count()).toEqual(1);
      expect(action).toHaveBeenCalledWith({
        position: new Cartesian2(1, 2),
      });

      action.calls.reset();

      // down, move, then up
      function simulateInput2() {
        simulateMouseDown(
          element,
          combine(
            {
              clientX: 1,
              clientY: 2,
            },
            eventOptions
          )
        );
        simulateMouseMove(
          element,
          combine(
            {
              clientX: 10,
              clientY: 11,
            },
            eventOptions
          )
        );
        simulateMouseUp(
          element,
          combine(
            {
              clientX: 10,
              clientY: 11,
            },
            eventOptions
          )
        );
      }

      simulateInput2();

      expect(action.calls.count()).toEqual(1);
      expect(action).toHaveBeenCalledWith({
        position: new Cartesian2(10, 11),
      });

      // should not be fired after removal
      action.calls.reset();

      handler.removeInputAction(eventType, modifier);

      simulateInput();
      simulateInput2();

      expect(action).not.toHaveBeenCalled();
    }

    var possibleButtons = [
      MouseButton.LEFT,
      MouseButton.MIDDLE,
      MouseButton.RIGHT,
    ];
    var possibleModifiers = [
      undefined,
      KeyboardEventModifier.SHIFT,
      KeyboardEventModifier.CTRL,
      KeyboardEventModifier.ALT,
    ];
    var possibleEventTypes = [
      ScreenSpaceEventType.LEFT_UP,
      ScreenSpaceEventType.MIDDLE_UP,
      ScreenSpaceEventType.RIGHT_UP,
    ];
    createAllMouseSpecCombinations(
      testMouseUpEvent,
      possibleButtons,
      possibleModifiers,
      possibleEventTypes
    );
  });

  describe("handles mouse click", function () {
    function testMouseClickEvent(eventType, modifier, eventOptions) {
      var action = createCloningSpy("action");
      handler.setInputAction(action, eventType, modifier);

      expect(handler.getInputAction(eventType, modifier)).toEqual(action);

      // down, then up
      function simulateInput() {
        simulateMouseDown(
          element,
          combine(
            {
              clientX: 1,
              clientY: 2,
            },
            eventOptions
          )
        );
        simulateMouseUp(
          element,
          combine(
            {
              clientX: 1,
              clientY: 2,
            },
            eventOptions
          )
        );
      }

      simulateInput();

      expect(action.calls.count()).toEqual(1);
      expect(action).toHaveBeenCalledWith({
        position: new Cartesian2(1, 2),
      });

      // mouse clicks are not fired if the mouse moves too far away from the down position
      action.calls.reset();
      simulateMouseDown(
        element,
        combine(
          {
            clientX: 1,
            clientY: 2,
          },
          eventOptions
        )
      );
      simulateMouseUp(
        element,
        combine(
          {
            clientX: 10,
            clientY: 11,
          },
          eventOptions
        )
      );

      expect(action).not.toHaveBeenCalled();

      // should not be fired after removal
      action.calls.reset();

      handler.removeInputAction(eventType, modifier);

      simulateInput();

      expect(action).not.toHaveBeenCalled();
    }

    var possibleButtons = [
      MouseButton.LEFT,
      MouseButton.MIDDLE,
      MouseButton.RIGHT,
    ];
    var possibleModifiers = [
      undefined,
      KeyboardEventModifier.SHIFT,
      KeyboardEventModifier.CTRL,
      KeyboardEventModifier.ALT,
    ];
    var possibleEventTypes = [
      ScreenSpaceEventType.LEFT_CLICK,
      ScreenSpaceEventType.MIDDLE_CLICK,
      ScreenSpaceEventType.RIGHT_CLICK,
    ];
    createAllMouseSpecCombinations(
      testMouseClickEvent,
      possibleButtons,
      possibleModifiers,
      possibleEventTypes
    );
  });

  describe("handles mouse double click", function () {
    function testMouseDoubleClickEvent(eventType, modifier, eventOptions) {
      var action = createCloningSpy("action");
      handler.setInputAction(action, eventType, modifier);

      expect(handler.getInputAction(eventType, modifier)).toEqual(action);

      function simulateInput() {
        DomEventSimulator.fireDoubleClick(
          element,
          combine(
            {
              clientX: 1,
              clientY: 2,
            },
            eventOptions
          )
        );
      }

      simulateInput();

      expect(action.calls.count()).toEqual(1);
      expect(action).toHaveBeenCalledWith({
        position: new Cartesian2(1, 2),
      });

      // should not be fired after removal
      action.calls.reset();

      handler.removeInputAction(eventType, modifier);

      simulateInput();

      expect(action).not.toHaveBeenCalled();
    }

    var possibleButtons = [MouseButton.LEFT];
    var possibleModifiers = [
      undefined,
      KeyboardEventModifier.SHIFT,
      KeyboardEventModifier.CTRL,
      KeyboardEventModifier.ALT,
    ];
    var possibleEventTypes = [ScreenSpaceEventType.LEFT_DOUBLE_CLICK];
    createAllMouseSpecCombinations(
      testMouseDoubleClickEvent,
      possibleButtons,
      possibleModifiers,
      possibleEventTypes
    );
  });

  describe("handles mouse move", function () {
    function testMouseMoveEvent(eventType, modifier, eventOptions) {
      var action = createCloningSpy("action");
      handler.setInputAction(action, eventType, modifier);

      expect(handler.getInputAction(eventType, modifier)).toEqual(action);

      function simulateInput() {
        simulateMouseMove(
          element,
          combine(
            {
              clientX: 1,
              clientY: 2,
            },
            eventOptions
          )
        );
        simulateMouseMove(
          element,
          combine(
            {
              clientX: 2,
              clientY: 3,
            },
            eventOptions
          )
        );
      }

      simulateInput();

      expect(action.calls.count()).toEqual(2);
      expect(action).toHaveBeenCalledWith({
        startPosition: new Cartesian2(1, 2),
        endPosition: new Cartesian2(2, 3),
      });

      // should not be fired after removal
      action.calls.reset();

      handler.removeInputAction(eventType, modifier);

      simulateInput();

      expect(action).not.toHaveBeenCalled();
    }

    var possibleButtons = [undefined];
    var possibleModifiers = [
      undefined,
      KeyboardEventModifier.SHIFT,
      KeyboardEventModifier.CTRL,
      KeyboardEventModifier.ALT,
    ];
    var possibleEventTypes = [ScreenSpaceEventType.MOUSE_MOVE];
    createAllMouseSpecCombinations(
      testMouseMoveEvent,
      possibleButtons,
      possibleModifiers,
      possibleEventTypes
    );
  });

  describe("handles mouse wheel", function () {
    if ("onwheel" in document) {
      describe("using standard wheel event", function () {
        function testWheelEvent(eventType, modifier, eventOptions) {
          var action = createCloningSpy("action");
          handler.setInputAction(action, eventType, modifier);

          expect(handler.getInputAction(eventType, modifier)).toEqual(action);

          function simulateInput() {
            DomEventSimulator.fireWheel(
              element,
              combine(
                {
                  deltaY: 120,
                },
                eventOptions
              )
            );
          }

          simulateInput();

          expect(action.calls.count()).toEqual(1);

          // NOTE: currently the action is passed the value of 'wheelDelta' which is inverted from the standard 'deltaY'
          expect(action).toHaveBeenCalledWith(-120);

          // should not be fired after removal
          action.calls.reset();

          handler.removeInputAction(eventType, modifier);

          simulateInput();

          expect(action).not.toHaveBeenCalled();
        }

        var possibleButtons = [undefined];
        var possibleModifiers = [
          undefined,
          KeyboardEventModifier.SHIFT,
          KeyboardEventModifier.CTRL,
          KeyboardEventModifier.ALT,
        ];
        var possibleEventTypes = [ScreenSpaceEventType.WHEEL];
        createAllMouseSpecCombinations(
          testWheelEvent,
          possibleButtons,
          possibleModifiers,
          possibleEventTypes
        );
      });
    } else if (document.onmousewheel !== undefined) {
      describe("using legacy mousewheel event", function () {
        function testMouseWheelEvent(eventType, modifier, eventOptions) {
          var action = createCloningSpy("action");
          handler.setInputAction(action, eventType, modifier);

          expect(handler.getInputAction(eventType, modifier)).toEqual(action);

          function simulateInput() {
            DomEventSimulator.fireMouseWheel(
              element,
              combine(
                {
                  wheelDelta: -120,
                },
                eventOptions
              )
            );
          }

          simulateInput();

          expect(action.calls.count()).toEqual(1);
          expect(action).toHaveBeenCalledWith(-120);

          // should not be fired after removal
          action.calls.reset();

          handler.removeInputAction(eventType, modifier);

          simulateInput();

          expect(action).not.toHaveBeenCalled();
        }

        var possibleButtons = [undefined];
        var possibleModifiers = [
          undefined,
          KeyboardEventModifier.SHIFT,
          KeyboardEventModifier.CTRL,
          KeyboardEventModifier.ALT,
        ];
        var possibleEventTypes = [ScreenSpaceEventType.WHEEL];
        createAllMouseSpecCombinations(
          testMouseWheelEvent,
          possibleButtons,
          possibleModifiers,
          possibleEventTypes
        );
      });
    }
  });

  it("handles touch start", function () {
    var eventType = ScreenSpaceEventType.LEFT_DOWN;

    var action = createCloningSpy("action");
    handler.setInputAction(action, eventType);

    expect(handler.getInputAction(eventType)).toEqual(action);

    function simulateInput() {
      var touchStartPosition = {
        clientX: 1,
        clientY: 2,
      };

      if (usePointerEvents) {
        DomEventSimulator.firePointerDown(
          element,
          combine(
            {
              pointerType: "touch",
              pointerId: 1,
            },
            touchStartPosition
          )
        );
      } else {
        DomEventSimulator.fireTouchStart(element, {
          changedTouches: [
            combine(
              {
                identifier: 0,
              },
              touchStartPosition
            ),
          ],
        });
      }
    }

    simulateInput();

    expect(action.calls.count()).toEqual(1);
    expect(action).toHaveBeenCalledWith({
      position: new Cartesian2(1, 2),
    });

    // should not be fired after removal
    action.calls.reset();

    handler.removeInputAction(eventType);

    simulateInput();

    expect(action).not.toHaveBeenCalled();
  });

  it("handles touch move", function () {
    var eventType = ScreenSpaceEventType.MOUSE_MOVE;

    var action = createCloningSpy("action");
    handler.setInputAction(action, eventType);

    expect(handler.getInputAction(eventType)).toEqual(action);

    // start, then move
    function simulateInput() {
      var touchStartPosition = {
        clientX: 1,
        clientY: 2,
      };
      var touchMovePosition = {
        clientX: 10,
        clientY: 11,
      };

      if (usePointerEvents) {
        DomEventSimulator.firePointerDown(
          element,
          combine(
            {
              pointerType: "touch",
              pointerId: 1,
            },
            touchStartPosition
          )
        );
        DomEventSimulator.firePointerMove(
          element,
          combine(
            {
              pointerType: "touch",
              pointerId: 1,
            },
            touchMovePosition
          )
        );
      } else {
        DomEventSimulator.fireTouchStart(element, {
          changedTouches: [
            combine(
              {
                identifier: 0,
              },
              touchStartPosition
            ),
          ],
        });
        DomEventSimulator.fireTouchMove(element, {
          changedTouches: [
            combine(
              {
                identifier: 0,
              },
              touchMovePosition
            ),
          ],
        });
      }
    }

    simulateInput();

    expect(action.calls.count()).toEqual(1);
    expect(action).toHaveBeenCalledWith({
      startPosition: new Cartesian2(1, 2),
      endPosition: new Cartesian2(10, 11),
    });

    // should not be fired after removal
    action.calls.reset();

    handler.removeInputAction(eventType);

    simulateInput();

    expect(action).not.toHaveBeenCalled();
  });

  it("handles touch end", function () {
    var eventType = ScreenSpaceEventType.LEFT_UP;

    var action = createCloningSpy("action");
    handler.setInputAction(action, eventType);

    expect(handler.getInputAction(eventType)).toEqual(action);

    // start, then end
    function simulateInput() {
      var touchStartPosition = {
        clientX: 1,
        clientY: 2,
      };
      var touchEndPosition = {
        clientX: 1,
        clientY: 2,
      };

      if (usePointerEvents) {
        DomEventSimulator.firePointerDown(
          element,
          combine(
            {
              pointerType: "touch",
              pointerId: 1,
            },
            touchStartPosition
          )
        );
        DomEventSimulator.firePointerUp(
          element,
          combine(
            {
              pointerType: "touch",
              pointerId: 1,
            },
            touchEndPosition
          )
        );
      } else {
        DomEventSimulator.fireTouchStart(element, {
          changedTouches: [
            combine(
              {
                identifier: 0,
              },
              touchStartPosition
            ),
          ],
        });
        DomEventSimulator.fireTouchEnd(element, {
          changedTouches: [
            combine(
              {
                identifier: 0,
              },
              touchEndPosition
            ),
          ],
        });
      }
    }

    simulateInput();

    expect(action.calls.count()).toEqual(1);
    expect(action).toHaveBeenCalledWith({
      position: new Cartesian2(1, 2),
    });

    action.calls.reset();

    // start, move, then end
    function simulateInput2() {
      var touchStartPosition = {
        clientX: 1,
        clientY: 2,
      };
      var touchMovePosition = {
        clientX: 10,
        clientY: 11,
      };
      var touchEndPosition = {
        clientX: 10,
        clientY: 11,
      };

      if (usePointerEvents) {
        DomEventSimulator.firePointerDown(
          element,
          combine(
            {
              pointerType: "touch",
              pointerId: 1,
            },
            touchStartPosition
          )
        );
        DomEventSimulator.firePointerMove(
          element,
          combine(
            {
              pointerType: "touch",
              pointerId: 1,
            },
            touchMovePosition
          )
        );
        DomEventSimulator.firePointerUp(
          element,
          combine(
            {
              pointerType: "touch",
              pointerId: 1,
            },
            touchEndPosition
          )
        );
      } else {
        DomEventSimulator.fireTouchStart(element, {
          changedTouches: [
            combine(
              {
                identifier: 0,
              },
              touchStartPosition
            ),
          ],
        });
        DomEventSimulator.fireTouchMove(element, {
          changedTouches: [
            combine(
              {
                identifier: 0,
              },
              touchMovePosition
            ),
          ],
        });
        DomEventSimulator.fireTouchEnd(element, {
          changedTouches: [
            combine(
              {
                identifier: 0,
              },
              touchEndPosition
            ),
          ],
        });
      }
    }

    simulateInput2();

    expect(action.calls.count()).toEqual(1);
    expect(action).toHaveBeenCalledWith({
      position: new Cartesian2(10, 11),
    });

    // should not be fired after removal
    action.calls.reset();

    handler.removeInputAction(eventType);

    simulateInput();
    simulateInput2();

    expect(action).not.toHaveBeenCalled();
  });

  it("treats touch end as touch cancel", function () {
    var eventType = ScreenSpaceEventType.LEFT_UP;

    var action = createCloningSpy("action");
    handler.setInputAction(action, eventType);

    expect(handler.getInputAction(eventType)).toEqual(action);

    // start, then end
    function simulateInput() {
      var touchStartPosition = {
        clientX: 1,
        clientY: 2,
      };
      var touchEndPosition = {
        clientX: 1,
        clientY: 2,
      };

      if (usePointerEvents) {
        DomEventSimulator.firePointerDown(
          element,
          combine(
            {
              pointerType: "touch",
              pointerId: 1,
            },
            touchStartPosition
          )
        );
        DomEventSimulator.firePointerCancel(
          element,
          combine(
            {
              pointerType: "touch",
              pointerId: 1,
            },
            touchEndPosition
          )
        );
      } else {
        DomEventSimulator.fireTouchStart(element, {
          changedTouches: [
            combine(
              {
                identifier: 0,
              },
              touchStartPosition
            ),
          ],
        });
        DomEventSimulator.fireTouchCancel(element, {
          changedTouches: [
            combine(
              {
                identifier: 0,
              },
              touchEndPosition
            ),
          ],
        });
      }
    }

    simulateInput();

    expect(action.calls.count()).toEqual(1);
    expect(action).toHaveBeenCalledWith({
      position: new Cartesian2(1, 2),
    });

    action.calls.reset();

    // start, move, then end
    function simulateInput2() {
      var touchStartPosition = {
        clientX: 1,
        clientY: 2,
      };
      var touchMovePosition = {
        clientX: 10,
        clientY: 11,
      };
      var touchEndPosition = {
        clientX: 10,
        clientY: 11,
      };

      if (usePointerEvents) {
        DomEventSimulator.firePointerDown(
          element,
          combine(
            {
              pointerType: "touch",
              pointerId: 1,
            },
            touchStartPosition
          )
        );
        DomEventSimulator.firePointerMove(
          element,
          combine(
            {
              pointerType: "touch",
              pointerId: 1,
            },
            touchMovePosition
          )
        );
        DomEventSimulator.firePointerCancel(
          element,
          combine(
            {
              pointerType: "touch",
              pointerId: 1,
            },
            touchEndPosition
          )
        );
      } else {
        DomEventSimulator.fireTouchStart(element, {
          changedTouches: [
            combine(
              {
                identifier: 0,
              },
              touchStartPosition
            ),
          ],
        });
        DomEventSimulator.fireTouchMove(element, {
          changedTouches: [
            combine(
              {
                identifier: 0,
              },
              touchMovePosition
            ),
          ],
        });
        DomEventSimulator.fireTouchCancel(element, {
          changedTouches: [
            combine(
              {
                identifier: 0,
              },
              touchEndPosition
            ),
          ],
        });
      }
    }

    simulateInput2();

    expect(action.calls.count()).toEqual(1);
    expect(action).toHaveBeenCalledWith({
      position: new Cartesian2(10, 11),
    });

    // should not be fired after removal
    action.calls.reset();

    handler.removeInputAction(eventType);

    simulateInput();
    simulateInput2();

    expect(action).not.toHaveBeenCalled();
  });

  it("handles touch pinch start", function () {
    var eventType = ScreenSpaceEventType.PINCH_START;

    var action = createCloningSpy("action");
    handler.setInputAction(action, eventType);

    expect(handler.getInputAction(eventType)).toEqual(action);

    // touch 1, then touch 2
    function simulateInput() {
      var touch1StartPosition = {
        clientX: 1,
        clientY: 2,
      };
      var touch2StartPosition = {
        clientX: 3,
        clientY: 4,
      };

      if (usePointerEvents) {
        DomEventSimulator.firePointerDown(
          element,
          combine(
            {
              pointerType: "touch",
              pointerId: 1,
            },
            touch1StartPosition
          )
        );
        DomEventSimulator.firePointerDown(
          element,
          combine(
            {
              pointerType: "touch",
              pointerId: 2,
            },
            touch2StartPosition
          )
        );
      } else {
        DomEventSimulator.fireTouchStart(element, {
          changedTouches: [
            combine(
              {
                identifier: 0,
              },
              touch1StartPosition
            ),
          ],
        });
        DomEventSimulator.fireTouchStart(element, {
          changedTouches: [
            combine(
              {
                identifier: 0,
              },
              touch1StartPosition
            ),
            combine(
              {
                identifier: 1,
              },
              touch2StartPosition
            ),
          ],
        });
      }
    }

    simulateInput();

    expect(action.calls.count()).toEqual(1);
    expect(action).toHaveBeenCalledWith({
      position1: new Cartesian2(1, 2),
      position2: new Cartesian2(3, 4),
    });

    // should not be fired after removal
    action.calls.reset();

    handler.removeInputAction(eventType);

    simulateInput();

    expect(action).not.toHaveBeenCalled();
  });

  it("handles touch pinch move", function () {
    var eventType = ScreenSpaceEventType.PINCH_MOVE;

    var action = createCloningSpy("action");
    handler.setInputAction(action, eventType);

    expect(handler.getInputAction(eventType)).toEqual(action);

    // touch 1, then touch 2, then move
    function simulateInput() {
      var touch1StartPosition = {
        clientX: 1,
        clientY: 2,
      };
      var touch2StartPosition = {
        clientX: 4,
        clientY: 3,
      };
      var touch1MovePosition = {
        clientX: 10,
        clientY: 11,
      };
      var touch2MovePosition = {
        clientX: 21,
        clientY: 20,
      };

      if (usePointerEvents) {
        DomEventSimulator.firePointerDown(
          element,
          combine(
            {
              pointerType: "touch",
              pointerId: 1,
            },
            touch1StartPosition
          )
        );
        DomEventSimulator.firePointerDown(
          element,
          combine(
            {
              pointerType: "touch",
              pointerId: 2,
            },
            touch2StartPosition
          )
        );
        DomEventSimulator.firePointerMove(
          element,
          combine(
            {
              pointerType: "touch",
              pointerId: 1,
            },
            touch1MovePosition
          )
        );
        DomEventSimulator.firePointerMove(
          element,
          combine(
            {
              pointerType: "touch",
              pointerId: 2,
            },
            touch2MovePosition
          )
        );
      } else {
        DomEventSimulator.fireTouchStart(element, {
          changedTouches: [
            combine(
              {
                identifier: 0,
              },
              touch1StartPosition
            ),
          ],
        });
        DomEventSimulator.fireTouchStart(element, {
          changedTouches: [
            combine(
              {
                identifier: 0,
              },
              touch1StartPosition
            ),
            combine(
              {
                identifier: 1,
              },
              touch2StartPosition
            ),
          ],
        });
        DomEventSimulator.fireTouchMove(element, {
          changedTouches: [
            combine(
              {
                identifier: 0,
              },
              touch1MovePosition
            ),
            combine(
              {
                identifier: 1,
              },
              touch2MovePosition
            ),
          ],
        });
      }
    }

    simulateInput();

    // original delta X: 3
    // original delta Y: 1
    // final delta X: 11
    // final delta Y: 9

    if (usePointerEvents) {
      // because every pointer event is separate, one touch moves, then the other.
      expect(action.calls.count()).toEqual(2);

      // intermediate delta X: -6
      // intermediate delta Y: -8
      expect(action).toHaveBeenCalledWith({
        distance: {
          startPosition: new Cartesian2(0, Math.sqrt(3 * 3 + 1 * 1) * 0.25),
          endPosition: new Cartesian2(0, Math.sqrt(-6 * -6 + -8 * -8) * 0.25),
        },
        angleAndHeight: {
          startPosition: new Cartesian2(Math.atan2(1, 3), (3 + 2) * 0.125),
          endPosition: new Cartesian2(Math.atan2(-8, -6), (3 + 11) * 0.125),
        },
      });
      expect(action).toHaveBeenCalledWith({
        distance: {
          startPosition: new Cartesian2(0, Math.sqrt(-6 * -6 + -8 * -8) * 0.25),
          endPosition: new Cartesian2(0, Math.sqrt(11 * 11 + 9 * 9) * 0.25),
        },
        angleAndHeight: {
          startPosition: new Cartesian2(Math.atan2(-8, -6), (3 + 11) * 0.125),
          endPosition: new Cartesian2(Math.atan2(9, 11), (11 + 20) * 0.125),
        },
      });
    } else {
      // touch events can move both touches simultaneously
      expect(action.calls.count()).toEqual(1);
      expect(action).toHaveBeenCalledWith({
        distance: {
          startPosition: new Cartesian2(0, Math.sqrt(3 * 3 + 1 * 1) * 0.25),
          endPosition: new Cartesian2(0, Math.sqrt(11 * 11 + 9 * 9) * 0.25),
        },
        angleAndHeight: {
          startPosition: new Cartesian2(Math.atan2(1, 3), (3 + 2) * 0.125),
          endPosition: new Cartesian2(Math.atan2(9, 11), (11 + 20) * 0.125),
        },
      });
    }

    // should not be fired after removal
    action.calls.reset();

    handler.removeInputAction(eventType);

    simulateInput();

    expect(action).not.toHaveBeenCalled();
  });

  it("handles touch pinch release", function () {
    var leftDownEventType = ScreenSpaceEventType.LEFT_DOWN;
    var leftDownAction = createCloningSpy("LEFT_DOWN");
    handler.setInputAction(leftDownAction, leftDownEventType);

    var pinchStartEventType = ScreenSpaceEventType.PINCH_START;
    var pinchStartAction = createCloningSpy("PINCH_START");
    handler.setInputAction(pinchStartAction, pinchStartEventType);

    var pinchEndEventType = ScreenSpaceEventType.PINCH_END;
    var pinchEndAction = createCloningSpy("PINCH_END");
    handler.setInputAction(pinchEndAction, pinchEndEventType);

    var touch1Position = {
      clientX: 1,
      clientY: 2,
    };
    var touch2Position = {
      clientX: 4,
      clientY: 3,
    };
    if (usePointerEvents) {
      DomEventSimulator.firePointerDown(
        element,
        combine(
          {
            pointerType: "touch",
            pointerId: 1,
          },
          touch1Position
        )
      );
      DomEventSimulator.firePointerDown(
        element,
        combine(
          {
            pointerType: "touch",
            pointerId: 2,
          },
          touch2Position
        )
      );

      // Releasing one of two fingers should not trigger
      // PINCH_END or LEFT_DOWN:
      leftDownAction.calls.reset();
      DomEventSimulator.firePointerUp(
        element,
        combine(
          {
            pointerType: "touch",
            pointerId: 1,
          },
          touch1Position
        )
      );
      expect(pinchEndAction).not.toHaveBeenCalled();
      expect(leftDownAction).not.toHaveBeenCalled();
      pinchEndAction.calls.reset();

      // Putting another finger down should not trigger
      // PINCH_START:
      pinchStartAction.calls.reset();
      DomEventSimulator.firePointerDown(
        element,
        combine(
          {
            pointerType: "touch",
            pointerId: 1,
          },
          touch2Position
        )
      );
      expect(pinchStartAction).not.toHaveBeenCalled();

      // Releasing both fingers should trigger PINCH_END:
      DomEventSimulator.firePointerUp(
        element,
        combine(
          {
            pointerType: "touch",
            pointerId: 1,
          },
          touch2Position
        )
      );
      DomEventSimulator.firePointerUp(
        element,
        combine(
          {
            pointerType: "touch",
            pointerId: 2,
          },
          touch2Position
        )
      );
      expect(pinchEndAction).toHaveBeenCalled();
    } else {
      DomEventSimulator.fireTouchStart(element, {
        changedTouches: [
          combine({ identifier: 0 }, touch1Position),
          combine({ identifier: 1 }, touch2Position),
        ],
      });
      leftDownAction.calls.reset();

      // Releasing one of two fingers should not trigger
      // PINCH_END or LEFT_DOWN:
      DomEventSimulator.fireTouchEnd(element, {
        changedTouches: [combine({ identifier: 0 }, touch1Position)],
      });

      expect(pinchEndAction).not.toHaveBeenCalled();
      expect(leftDownAction).not.toHaveBeenCalled();

      // Releasing both fingers should trigger PINCH_END:
      pinchEndAction.calls.reset();
      DomEventSimulator.fireTouchEnd(element, {
        changedTouches: [combine({ identifier: 1 }, touch2Position)],
      });
      expect(pinchEndAction).toHaveBeenCalled();
    }
  });

  it("handles touch click", function () {
    var eventType = ScreenSpaceEventType.LEFT_CLICK;

    var action = createCloningSpy("action");
    handler.setInputAction(action, eventType);

    expect(handler.getInputAction(eventType)).toEqual(action);

    // start, then end
    function simulateInput() {
      var touchStartPosition = {
        clientX: 1,
        clientY: 2,
      };
      var touchEndPosition = {
        clientX: 1,
        clientY: 2,
      };

      if (usePointerEvents) {
        DomEventSimulator.firePointerDown(
          element,
          combine(
            {
              pointerType: "touch",
              pointerId: 1,
            },
            touchStartPosition
          )
        );
        DomEventSimulator.firePointerUp(
          element,
          combine(
            {
              pointerType: "touch",
              pointerId: 1,
            },
            touchEndPosition
          )
        );
      } else {
        DomEventSimulator.fireTouchStart(element, {
          changedTouches: [
            combine(
              {
                identifier: 0,
              },
              touchStartPosition
            ),
          ],
        });
        DomEventSimulator.fireTouchEnd(element, {
          changedTouches: [
            combine(
              {
                identifier: 0,
              },
              touchEndPosition
            ),
          ],
        });
      }
    }

    simulateInput();

    expect(action.calls.count()).toEqual(1);
    expect(action).toHaveBeenCalledWith({
      position: new Cartesian2(1, 2),
    });

    // should not be fired after removal
    action.calls.reset();

    handler.removeInputAction(eventType);

    simulateInput();

    expect(action).not.toHaveBeenCalled();
  });

  it("handles touch and hold gesture", function () {
    jasmine.clock().install();

    var delay = ScreenSpaceEventHandler.touchHoldDelayMilliseconds;

    var eventType = ScreenSpaceEventType.RIGHT_CLICK;

    var action = createCloningSpy("action");
    handler.setInputAction(action, eventType);

    expect(handler.getInputAction(eventType)).toEqual(action);

    // start, then end
    function simulateInput(timeout) {
      var touchStartPosition = {
        clientX: 1,
        clientY: 2,
      };
      var touchEndPosition = {
        clientX: 1,
        clientY: 2,
      };

      if (usePointerEvents) {
        DomEventSimulator.firePointerDown(
          element,
          combine(
            {
              pointerType: "touch",
              pointerId: 1,
            },
            touchStartPosition
          )
        );
        jasmine.clock().tick(timeout);
        DomEventSimulator.firePointerUp(
          element,
          combine(
            {
              pointerType: "touch",
              pointerId: 1,
            },
            touchEndPosition
          )
        );
      } else {
        DomEventSimulator.fireTouchStart(element, {
          changedTouches: [
            combine(
              {
                identifier: 0,
              },
              touchStartPosition
            ),
          ],
        });
        jasmine.clock().tick(timeout);
        DomEventSimulator.fireTouchEnd(element, {
          changedTouches: [
            combine(
              {
                identifier: 0,
              },
              touchEndPosition
            ),
          ],
        });
      }
    }

    simulateInput(delay + 1);

    expect(action.calls.count()).toEqual(1);
    expect(action).toHaveBeenCalledWith({
      position: new Cartesian2(1, 2),
    });

    // Should not be fired if hold delay is less than touchHoldDelayMilliseconds.
    action.calls.reset();

    simulateInput(delay - 1);

    expect(action).not.toHaveBeenCalled();

    // Should not be fired after removal.
    action.calls.reset();

    handler.removeInputAction(eventType);

    simulateInput(delay + 1);

    expect(action).not.toHaveBeenCalled();

    // Should not fire click action if touch and hold is triggered.
    eventType = ScreenSpaceEventType.LEFT_CLICK;

    handler.setInputAction(action, eventType);

    simulateInput(delay + 1);

    expect(action).not.toHaveBeenCalled();

    jasmine.clock().uninstall();
  });

  it("treats touch cancel as touch end for touch clicks", function () {
    var eventType = ScreenSpaceEventType.LEFT_CLICK;

    var action = createCloningSpy("action");
    handler.setInputAction(action, eventType);

    expect(handler.getInputAction(eventType)).toEqual(action);

    // start, then end
    function simulateInput() {
      var touchStartPosition = {
        clientX: 1,
        clientY: 2,
      };
      var touchEndPosition = {
        clientX: 1,
        clientY: 2,
      };

      if (usePointerEvents) {
        DomEventSimulator.firePointerDown(
          element,
          combine(
            {
              pointerType: "touch",
              pointerId: 1,
            },
            touchStartPosition
          )
        );
        DomEventSimulator.firePointerCancel(
          element,
          combine(
            {
              pointerType: "touch",
              pointerId: 1,
            },
            touchEndPosition
          )
        );
      } else {
        DomEventSimulator.fireTouchStart(element, {
          changedTouches: [
            combine(
              {
                identifier: 0,
              },
              touchStartPosition
            ),
          ],
        });
        DomEventSimulator.fireTouchCancel(element, {
          changedTouches: [
            combine(
              {
                identifier: 0,
              },
              touchEndPosition
            ),
          ],
        });
      }
    }

    simulateInput();

    expect(action.calls.count()).toEqual(1);
    expect(action).toHaveBeenCalledWith({
      position: new Cartesian2(1, 2),
    });

    // should not be fired after removal
    action.calls.reset();

    handler.removeInputAction(eventType);

    simulateInput();

    expect(action).not.toHaveBeenCalled();
  });

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

  it("unregisters event listeners when destroyed", function () {
    handler = handler.destroy();

    spyOn(element, "addEventListener").and.callThrough();
    spyOn(element, "removeEventListener").and.callThrough();

    handler = new ScreenSpaceEventHandler(element);

    expect(element.addEventListener.calls.count()).not.toEqual(0);
    expect(element.removeEventListener.calls.count()).toEqual(0);

    handler.destroy();

    expect(element.removeEventListener.calls.count()).toEqual(
      element.addEventListener.calls.count()
    );
  });
});