const KeymapManager = require('atom-keymap');
const WindowEventHandler = require('../src/window-event-handler');
const { conditionPromise } = require('./async-spec-helpers');

describe('WindowEventHandler', () => {
  let windowEventHandler;

  beforeEach(() => {
    atom.uninstallWindowEventHandler();
    spyOn(atom, 'hide');
    const initialPath = atom.project.getPaths()[0];
    spyOn(atom, 'getLoadSettings').andCallFake(() => {
      const loadSettings = atom.getLoadSettings.originalValue.call(atom);
      loadSettings.initialPath = initialPath;
      return loadSettings;
    });
    atom.project.destroy();
    windowEventHandler = new WindowEventHandler({
      atomEnvironment: atom,
      applicationDelegate: atom.applicationDelegate
    });
    windowEventHandler.initialize(window, document);
  });

  afterEach(() => {
    windowEventHandler.unsubscribe();
    atom.installWindowEventHandler();
  });

  describe('when the window is loaded', () =>
    it("doesn't have .is-blurred on the body tag", () => {
      if (process.platform === 'win32') {
        return;
      } // Win32TestFailures - can not steal focus
      expect(document.body.className).not.toMatch('is-blurred');
    }));

  describe('when the window is blurred', () => {
    beforeEach(() => window.dispatchEvent(new CustomEvent('blur')));

    afterEach(() => document.body.classList.remove('is-blurred'));

    it('adds the .is-blurred class on the body', () =>
      expect(document.body.className).toMatch('is-blurred'));

    describe('when the window is focused again', () =>
      it('removes the .is-blurred class from the body', () => {
        window.dispatchEvent(new CustomEvent('focus'));
        expect(document.body.className).not.toMatch('is-blurred');
      }));
  });

  describe('resize event', () =>
    it('calls storeWindowDimensions', async () => {
      jasmine.useRealClock();

      spyOn(atom, 'storeWindowDimensions');
      window.dispatchEvent(new CustomEvent('resize'));

      await conditionPromise(() => atom.storeWindowDimensions.callCount > 0);
    }));

  describe('window:close event', () =>
    it('closes the window', () => {
      spyOn(atom, 'close');
      window.dispatchEvent(new CustomEvent('window:close'));
      expect(atom.close).toHaveBeenCalled();
    }));

  describe('when a link is clicked', () => {
    it('opens the http/https links in an external application', () => {
      const { shell } = require('electron');
      spyOn(shell, 'openExternal');

      const link = document.createElement('a');
      const linkChild = document.createElement('span');
      link.appendChild(linkChild);
      link.href = 'http://github.com';
      jasmine.attachToDOM(link);
      const fakeEvent = {
        target: linkChild,
        currentTarget: link,
        preventDefault: () => {}
      };

      windowEventHandler.handleLinkClick(fakeEvent);
      expect(shell.openExternal).toHaveBeenCalled();
      expect(shell.openExternal.argsForCall[0][0]).toBe('http://github.com');
      shell.openExternal.reset();

      link.href = 'https://github.com';
      windowEventHandler.handleLinkClick(fakeEvent);
      expect(shell.openExternal).toHaveBeenCalled();
      expect(shell.openExternal.argsForCall[0][0]).toBe('https://github.com');
      shell.openExternal.reset();

      link.href = '';
      windowEventHandler.handleLinkClick(fakeEvent);
      expect(shell.openExternal).not.toHaveBeenCalled();
      shell.openExternal.reset();

      link.href = '#scroll-me';
      windowEventHandler.handleLinkClick(fakeEvent);
      expect(shell.openExternal).not.toHaveBeenCalled();
    });

    it('opens the "atom://" links with URL handler', () => {
      const uriHandler = windowEventHandler.atomEnvironment.uriHandlerRegistry;
      expect(uriHandler).toBeDefined();
      spyOn(uriHandler, 'handleURI');

      const link = document.createElement('a');
      const linkChild = document.createElement('span');
      link.appendChild(linkChild);
      link.href = 'atom://github.com';
      jasmine.attachToDOM(link);
      const fakeEvent = {
        target: linkChild,
        currentTarget: link,
        preventDefault: () => {}
      };

      windowEventHandler.handleLinkClick(fakeEvent);
      expect(uriHandler.handleURI).toHaveBeenCalled();
      expect(uriHandler.handleURI.argsForCall[0][0]).toBe('atom://github.com');
    });
  });

  describe('when a form is submitted', () =>
    it("prevents the default so that the window's URL isn't changed", () => {
      const form = document.createElement('form');
      jasmine.attachToDOM(form);

      let defaultPrevented = false;
      const event = new CustomEvent('submit', { bubbles: true });
      event.preventDefault = () => {
        defaultPrevented = true;
      };
      form.dispatchEvent(event);
      expect(defaultPrevented).toBe(true);
    }));

  describe('core:focus-next and core:focus-previous', () => {
    describe('when there is no currently focused element', () =>
      it('focuses the element with the lowest/highest tabindex', () => {
        const wrapperDiv = document.createElement('div');
        wrapperDiv.innerHTML = `
          <div>
            <button tabindex="2"></button>
            <input tabindex="1">
          </div>
        `.trim();
        const elements = wrapperDiv.firstChild;
        jasmine.attachToDOM(elements);

        elements.dispatchEvent(
          new CustomEvent('core:focus-next', { bubbles: true })
        );
        expect(document.activeElement.tabIndex).toBe(1);

        document.body.focus();
        elements.dispatchEvent(
          new CustomEvent('core:focus-previous', { bubbles: true })
        );
        expect(document.activeElement.tabIndex).toBe(2);
      }));

    describe('when a tabindex is set on the currently focused element', () =>
      it('focuses the element with the next highest/lowest tabindex, skipping disabled elements', () => {
        const wrapperDiv = document.createElement('div');
        wrapperDiv.innerHTML = `
          <div>
            <input tabindex="1">
            <button tabindex="2"></button>
            <button tabindex="5"></button>
            <input tabindex="-1">
            <input tabindex="3">
            <button tabindex="7"></button>
            <input tabindex="9" disabled>
          </div>
        `.trim();
        const elements = wrapperDiv.firstChild;
        jasmine.attachToDOM(elements);

        elements.querySelector('[tabindex="1"]').focus();

        elements.dispatchEvent(
          new CustomEvent('core:focus-next', { bubbles: true })
        );
        expect(document.activeElement.tabIndex).toBe(2);

        elements.dispatchEvent(
          new CustomEvent('core:focus-next', { bubbles: true })
        );
        expect(document.activeElement.tabIndex).toBe(3);

        elements.dispatchEvent(
          new CustomEvent('core:focus-next', { bubbles: true })
        );
        expect(document.activeElement.tabIndex).toBe(5);

        elements.dispatchEvent(
          new CustomEvent('core:focus-next', { bubbles: true })
        );
        expect(document.activeElement.tabIndex).toBe(7);

        elements.dispatchEvent(
          new CustomEvent('core:focus-next', { bubbles: true })
        );
        expect(document.activeElement.tabIndex).toBe(1);

        elements.dispatchEvent(
          new CustomEvent('core:focus-previous', { bubbles: true })
        );
        expect(document.activeElement.tabIndex).toBe(7);

        elements.dispatchEvent(
          new CustomEvent('core:focus-previous', { bubbles: true })
        );
        expect(document.activeElement.tabIndex).toBe(5);

        elements.dispatchEvent(
          new CustomEvent('core:focus-previous', { bubbles: true })
        );
        expect(document.activeElement.tabIndex).toBe(3);

        elements.dispatchEvent(
          new CustomEvent('core:focus-previous', { bubbles: true })
        );
        expect(document.activeElement.tabIndex).toBe(2);

        elements.dispatchEvent(
          new CustomEvent('core:focus-previous', { bubbles: true })
        );
        expect(document.activeElement.tabIndex).toBe(1);

        elements.dispatchEvent(
          new CustomEvent('core:focus-previous', { bubbles: true })
        );
        expect(document.activeElement.tabIndex).toBe(7);
      }));
  });

  describe('when keydown events occur on the document', () =>
    it('dispatches the event via the KeymapManager and CommandRegistry', () => {
      const dispatchedCommands = [];
      atom.commands.onWillDispatch(command => dispatchedCommands.push(command));
      atom.commands.add('*', { 'foo-command': () => {} });
      atom.keymaps.add('source-name', { '*': { x: 'foo-command' } });

      const event = KeymapManager.buildKeydownEvent('x', {
        target: document.createElement('div')
      });
      document.dispatchEvent(event);

      expect(dispatchedCommands.length).toBe(1);
      expect(dispatchedCommands[0].type).toBe('foo-command');
    }));

  describe('native key bindings', () =>
    it("correctly dispatches them to active elements with the '.native-key-bindings' class", () => {
      const webContentsSpy = jasmine.createSpyObj('webContents', [
        'copy',
        'paste'
      ]);
      spyOn(atom.applicationDelegate, 'getCurrentWindow').andReturn({
        webContents: webContentsSpy,
        on: () => {}
      });

      const nativeKeyBindingsInput = document.createElement('input');
      nativeKeyBindingsInput.classList.add('native-key-bindings');
      jasmine.attachToDOM(nativeKeyBindingsInput);
      nativeKeyBindingsInput.focus();

      atom.dispatchApplicationMenuCommand('core:copy');
      atom.dispatchApplicationMenuCommand('core:paste');

      expect(webContentsSpy.copy).toHaveBeenCalled();
      expect(webContentsSpy.paste).toHaveBeenCalled();

      webContentsSpy.copy.reset();
      webContentsSpy.paste.reset();

      const normalInput = document.createElement('input');
      jasmine.attachToDOM(normalInput);
      normalInput.focus();

      atom.dispatchApplicationMenuCommand('core:copy');
      atom.dispatchApplicationMenuCommand('core:paste');

      expect(webContentsSpy.copy).not.toHaveBeenCalled();
      expect(webContentsSpy.paste).not.toHaveBeenCalled();
    }));
});