/* Copyright 2017 Mozilla Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import {
  DOMSVGFactory, getFilenameFromUrl, isValidFetchUrl
} from '../../src/display/display_utils';
import isNodeJS from '../../src/shared/is_node';

describe('display_utils', function() {
  describe('DOMSVGFactory', function() {
    let svgFactory;

    beforeAll(function (done) {
      svgFactory = new DOMSVGFactory();
      done();
    });

    afterAll(function () {
      svgFactory = null;
    });

    it('`create` should throw an error if the dimensions are invalid',
        function() {
      // Invalid width.
      expect(function() {
        return svgFactory.create(-1, 0);
      }).toThrow(new Error('Invalid SVG dimensions'));

      // Invalid height.
      expect(function() {
        return svgFactory.create(0, -1);
      }).toThrow(new Error('Invalid SVG dimensions'));
    });

    it('`create` should return an SVG element if the dimensions are valid',
        function() {
      if (isNodeJS()) {
        pending('Document is not supported in Node.js.');
      }

      let svg = svgFactory.create(20, 40);

      expect(svg instanceof SVGSVGElement).toBe(true);
      expect(svg.getAttribute('version')).toBe('1.1');
      expect(svg.getAttribute('width')).toBe('20px');
      expect(svg.getAttribute('height')).toBe('40px');
      expect(svg.getAttribute('preserveAspectRatio')).toBe('none');
      expect(svg.getAttribute('viewBox')).toBe('0 0 20 40');
    });

    it('`createElement` should throw an error if the type is not a string',
        function() {
      expect(function() {
        return svgFactory.createElement(true);
      }).toThrow(new Error('Invalid SVG element type'));
    });

    it('`createElement` should return an SVG element if the type is valid',
        function() {
      if (isNodeJS()) {
        pending('Document is not supported in Node.js.');
      }

      let svg = svgFactory.createElement('svg:rect');

      expect(svg instanceof SVGRectElement).toBe(true);
    });
  });

  describe('getFilenameFromUrl', function() {
    it('should get the filename from an absolute URL', function() {
      var url = 'http://server.org/filename.pdf';
      var result = getFilenameFromUrl(url);
      var expected = 'filename.pdf';
      expect(result).toEqual(expected);
    });

    it('should get the filename from a relative URL', function() {
      var url = '../../filename.pdf';
      var result = getFilenameFromUrl(url);
      var expected = 'filename.pdf';
      expect(result).toEqual(expected);
    });
  });

  describe('isValidFetchUrl', function() {
    it('handles invalid Fetch URLs', function() {
      expect(isValidFetchUrl(null)).toEqual(false);
      expect(isValidFetchUrl(100)).toEqual(false);
      expect(isValidFetchUrl('foo')).toEqual(false);
      expect(isValidFetchUrl('/foo', 100)).toEqual(false);
    });

    it('handles relative Fetch URLs', function() {
      expect(isValidFetchUrl('/foo', 'file://www.example.com')).toEqual(false);
      expect(isValidFetchUrl('/foo', 'http://www.example.com')).toEqual(true);
    });

    it('handles unsupported Fetch protocols', function() {
      expect(isValidFetchUrl('file://www.example.com')).toEqual(false);
      expect(isValidFetchUrl('ftp://www.example.com')).toEqual(false);
    });

    it('handles supported Fetch protocols', function() {
      expect(isValidFetchUrl('http://www.example.com')).toEqual(true);
      expect(isValidFetchUrl('https://www.example.com')).toEqual(true);
    });
  });
});