import getArguments from "../getArguments.js";
import { knockout } from "../../Source/Cesium.js";
import { createCommand } from "../../Source/Cesium.js";

describe("Widgets/createCommand", function () {
  var spyFunction;
  var spyFunctionReturnValue = 5;

  beforeEach(function () {
    spyFunction = jasmine
      .createSpy("spyFunction")
      .and.returnValue(spyFunctionReturnValue);
  });

  it("works with default value of canExecute", function () {
    var command = createCommand(spyFunction);
    expect(command.canExecute).toBe(true);
    expect(command()).toBe(spyFunctionReturnValue);
    expect(spyFunction).toHaveBeenCalled();
  });

  it("throws when canExecute value is false", function () {
    var command = createCommand(spyFunction, false);
    expect(function () {
      command();
    }).toThrowDeveloperError();
    expect(spyFunction).not.toHaveBeenCalled();
  });

  it("throws without a func parameter", function () {
    expect(function () {
      return createCommand(undefined);
    }).toThrowDeveloperError();
  });

  it("works with custom canExecute observable", function () {
    var canExecute = knockout.observable(false);
    var command = createCommand(spyFunction, canExecute);

    expect(command.canExecute).toBe(false);
    expect(function () {
      command();
    }).toThrowDeveloperError();
    expect(spyFunction).not.toHaveBeenCalled();

    canExecute(true);

    expect(command.canExecute).toBe(true);
    expect(command()).toBe(spyFunctionReturnValue);
    expect(spyFunction).toHaveBeenCalled();
  });

  it("calls pre/post events", function () {
    var command = createCommand(spyFunction);
    var myArg = {};

    var beforeExecuteSpy = jasmine.createSpy("beforeExecute");
    command.beforeExecute.addEventListener(beforeExecuteSpy);

    var afterExecuteSpy = jasmine.createSpy("afterExecute");
    command.afterExecute.addEventListener(afterExecuteSpy);

    expect(command(myArg)).toBe(spyFunctionReturnValue);

    expect(beforeExecuteSpy.calls.count()).toEqual(1);
    expect(beforeExecuteSpy).toHaveBeenCalledWith({
      cancel: false,
      args: getArguments(myArg),
    });

    expect(afterExecuteSpy.calls.count()).toEqual(1);
    expect(afterExecuteSpy).toHaveBeenCalledWith(spyFunctionReturnValue);
  });

  it("cancels a command if beforeExecute sets cancel to true", function () {
    var command = createCommand(spyFunction);
    var myArg = {};

    var beforeExecuteSpy = jasmine
      .createSpy("beforeExecute")
      .and.callFake(function (info) {
        info.cancel = true;
      });
    command.beforeExecute.addEventListener(beforeExecuteSpy);

    var afterExecuteSpy = jasmine.createSpy("afterExecute");
    command.afterExecute.addEventListener(afterExecuteSpy);

    expect(command(myArg)).toBeUndefined();

    expect(beforeExecuteSpy.calls.count()).toEqual(1);
    expect(afterExecuteSpy).not.toHaveBeenCalled();
  });
});