/* eslint-disable no-new, promise/catch-or-return */
import JSZip from 'jszip';
import SketchLoader from '~/blob/sketch';

describe('Sketch viewer', () => {
  const generateZipFileArrayBuffer = (zipFile, resolve, done) => {
    zipFile.generateAsync({ type: 'arrayBuffer' }).then(content => {
      resolve(content);

      setTimeout(() => {
        done();
      }, 100);
    });
  };

  preloadFixtures('static/sketch_viewer.html');

  beforeEach(() => {
    loadFixtures('static/sketch_viewer.html');
  });

  describe('with error message', () => {
    beforeEach(done => {
      spyOn(SketchLoader.prototype, 'getZipFile').and.callFake(
        () =>
          new Promise((resolve, reject) => {
            reject();

            setTimeout(() => {
              done();
            });
          }),
      );

      new SketchLoader(document.getElementById('js-sketch-viewer'));
    });

    it('renders error message', () => {
      expect(document.querySelector('#js-sketch-viewer p')).not.toBeNull();

      expect(document.querySelector('#js-sketch-viewer p').textContent.trim()).toContain(
        'Cannot show preview.',
      );
    });

    it('removes render the loading icon', () => {
      expect(document.querySelector('.js-loading-icon')).toBeNull();
    });
  });

  describe('success', () => {
    beforeEach(done => {
      spyOn(SketchLoader.prototype, 'getZipFile').and.callFake(
        () =>
          new Promise(resolve => {
            const zipFile = new JSZip();
            zipFile
              .folder('previews')
              .file(
                'preview.png',
                'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAMAAAAoyzS7AAAAA1BMVEUAAACnej3aAAAAAXRSTlMAQObYZgAAAA1JREFUeNoBAgD9/wAAAAIAAVMrnDAAAAAASUVORK5CYII=',
                {
                  base64: true,
                },
              );

            generateZipFileArrayBuffer(zipFile, resolve, done);
          }),
      );

      new SketchLoader(document.getElementById('js-sketch-viewer'));
    });

    it('does not render error message', () => {
      expect(document.querySelector('#js-sketch-viewer p')).toBeNull();
    });

    it('removes render the loading icon', () => {
      expect(document.querySelector('.js-loading-icon')).toBeNull();
    });

    it('renders preview img', () => {
      const img = document.querySelector('#js-sketch-viewer img');

      expect(img).not.toBeNull();
      expect(img.classList.contains('img-fluid')).toBeTruthy();
    });

    it('renders link to image', () => {
      const img = document.querySelector('#js-sketch-viewer img');
      const link = document.querySelector('#js-sketch-viewer a');

      expect(link.href).toBe(img.src);
      expect(link.target).toBe('_blank');
    });
  });

  describe('incorrect file', () => {
    beforeEach(done => {
      spyOn(SketchLoader.prototype, 'getZipFile').and.callFake(
        () =>
          new Promise(resolve => {
            const zipFile = new JSZip();

            generateZipFileArrayBuffer(zipFile, resolve, done);
          }),
      );

      new SketchLoader(document.getElementById('js-sketch-viewer'));
    });

    it('renders error message', () => {
      expect(document.querySelector('#js-sketch-viewer p')).not.toBeNull();

      expect(document.querySelector('#js-sketch-viewer p').textContent.trim()).toContain(
        'Cannot show preview.',
      );
    });
  });
});