/* eslint-env qunit */

import * as browser from '../editor/browser.js';
import * as utilities from '../editor/utilities.js';
import {NS} from '../editor/namespaces.js';

// log function
QUnit.log((details) => {
  if (window.console && window.console.log) {
    window.console.log(details.result + ' :: ' + details.message);
  }
});

/**
 * Create an element for test.
 * @param {module:utilities.SVGElementJSON} jsonMap
 * @returns {SVGElement}
 */
function mockCreateSVGElement (jsonMap) {
  const elem = document.createElementNS(NS.SVG, jsonMap.element);
  Object.entries(jsonMap.attr).forEach(([attr, value]) => {
    elem.setAttribute(attr, value);
  });
  return elem;
}
/**
 * Adds SVG Element per parameters and appends to root.
 * @param {module:utilities.SVGElementJSON} json
 * @returns {SVGElement}
 */
function mockaddSVGElementFromJson (json) {
  const elem = mockCreateSVGElement(json);
  svgroot.append(elem);
  return elem;
}
const mockPathActions = {resetOrientation () { /* */ }};
let mockHistorySubCommands = [];
const mockHistory = {
  BatchCommand: class {
    // eslint-disable-next-line class-methods-use-this
    addSubCommand (cmd) {
      mockHistorySubCommands.push(cmd);
    }
  },
  RemoveElementCommand: class {
    // Longhand needed since used as a constructor
    constructor (elem, nextSibling, parent) {
      this.elem = elem;
      this.nextSibling = nextSibling;
      this.parent = parent;
    }
  },
  InsertElementCommand: class {
    constructor (path) { // Longhand needed since used as a constructor
      this.path = path;
    }
  }
};
const mockCount = {
  clearSelection: 0,
  addToSelection: 0,
  addCommandToHistory: 0
};

/**
 * Increments clear seleciton count for mock test.
 * @returns {void}
 */
function mockClearSelection () {
  mockCount.clearSelection++;
}
/**
* Increments add selection count for mock test.
 * @returns {void}
 */
function mockAddToSelection () {
  mockCount.addToSelection++;
}
/**
* Increments add command to history count for mock test.
 * @returns {void}
 */
function mockAddCommandToHistory () {
  mockCount.addCommandToHistory++;
}

const svg = document.createElementNS(NS.SVG, 'svg');
const sandbox = document.getElementById('sandbox');
const svgroot = mockCreateSVGElement({
  element: 'svg',
  attr: {id: 'svgroot'}
});
sandbox.append(svgroot);

QUnit.module('svgedit.utilities', {
  beforeEach () {
    mockHistorySubCommands = [];
    mockCount.clearSelection = 0;
    mockCount.addToSelection = 0;
    mockCount.addCommandToHistory = 0;
  },
  afterEach () { /* */ }
});

QUnit.test('Test svgedit.utilities package', function (assert) {
  assert.expect(3);

  assert.ok(utilities);
  assert.ok(utilities.toXml);
  assert.equal(typeof utilities.toXml, typeof function () { /* */ });
});

QUnit.test('Test svgedit.utilities.toXml() function', function (assert) {
  assert.expect(6);
  const {toXml} = utilities;

  assert.equal(toXml('a'), 'a');
  assert.equal(toXml('ABC_'), 'ABC_');
  assert.equal(toXml('PB&J'), 'PB&J');
  assert.equal(toXml('2 < 5'), '2 &lt; 5');
  assert.equal(toXml('5 > 2'), '5 &gt; 2');
  assert.equal(toXml('\'<&>"'), '&#x27;&lt;&amp;&gt;&quot;');
});

QUnit.test('Test svgedit.utilities.fromXml() function', function (assert) {
  assert.expect(6);
  const {fromXml} = utilities;

  assert.equal(fromXml('a'), 'a');
  assert.equal(fromXml('ABC_'), 'ABC_');
  assert.equal(fromXml('PB&amp;J'), 'PB&J');
  assert.equal(fromXml('2 &lt; 5'), '2 < 5');
  assert.equal(fromXml('5 &gt; 2'), '5 > 2');
  assert.equal(fromXml('&lt;&amp;&gt;'), '<&>');
});

QUnit.test('Test svgedit.utilities.encode64() function', function (assert) {
  assert.expect(4);
  const {encode64} = utilities;

  assert.equal(encode64('abcdef'), 'YWJjZGVm');
  assert.equal(encode64('12345'), 'MTIzNDU=');
  assert.equal(encode64(' '), 'IA==');
  assert.equal(encode64('`~!@#$%^&*()-_=+[{]}\\|;:\'",<.>/?'), 'YH4hQCMkJV4mKigpLV89K1t7XX1cfDs6JyIsPC4+Lz8=');
});

QUnit.test('Test svgedit.utilities.decode64() function', function (assert) {
  assert.expect(4);
  const {decode64} = utilities;

  assert.equal(decode64('YWJjZGVm'), 'abcdef');
  assert.equal(decode64('MTIzNDU='), '12345');
  assert.equal(decode64('IA=='), ' ');
  assert.equal(decode64('YH4hQCMkJV4mKigpLV89K1t7XX1cfDs6JyIsPC4+Lz8='), '`~!@#$%^&*()-_=+[{]}\\|;:\'",<.>/?');
});

QUnit.test('Test svgedit.utilities.convertToXMLReferences() function', function (assert) {
  assert.expect(1);

  const convert = utilities.convertToXMLReferences;
  assert.equal(convert('ABC'), 'ABC');
  // assert.equal(convert('�BC'), '&#192;BC');
});

QUnit.test('Test svgedit.utilities.bboxToObj() function', function (assert) {
  assert.expect(5);
  const {bboxToObj} = utilities;

  const rect = svg.createSVGRect();
  rect.x = 1;
  rect.y = 2;
  rect.width = 3;
  rect.height = 4;

  const obj = bboxToObj(rect);
  assert.equal(typeof obj, typeof {});
  assert.equal(obj.x, 1);
  assert.equal(obj.y, 2);
  assert.equal(obj.width, 3);
  assert.equal(obj.height, 4);
});

QUnit.test('Test getUrlFromAttr', function (assert) {
  assert.expect(4);

  assert.equal(utilities.getUrlFromAttr('url(#foo)'), '#foo');
  assert.equal(utilities.getUrlFromAttr('url(somefile.svg#foo)'), 'somefile.svg#foo');
  assert.equal(utilities.getUrlFromAttr('url("#foo")'), '#foo');
  assert.equal(utilities.getUrlFromAttr('url("#foo")'), '#foo');
});

QUnit.test('Test getPathBBox', function (assert) {
  if (browser.supportsPathBBox()) {
    assert.expect(0);
    return;
  }
  assert.expect(3);
  const doc = utilities.text2xml('<svg></svg>');
  const path = doc.createElementNS(NS.SVG, 'path');
  path.setAttribute('d', 'm0,0l5,0l0,5l-5,0l0,-5z');
  const bb = utilities.getPathBBox(path);
  assert.equal(typeof bb, 'object', 'BBox returned object');
  assert.ok(bb.x && !isNaN(bb.x));
  assert.ok(bb.y && !isNaN(bb.y));
});

QUnit.test('Test getPathDFromSegments', function (assert) {
  const {getPathDFromSegments} = utilities;

  const doc = utilities.text2xml('<svg></svg>');
  const path = doc.createElementNS(NS.SVG, 'path');
  path.setAttribute('d', 'm0,0l5,0l0,5l-5,0l0,-5z');
  let d = getPathDFromSegments([
    ['M', [1, 2]],
    ['Z', []]
  ]);
  assert.equal(d, 'M1,2 Z');

  d = getPathDFromSegments([
    ['M', [1, 2]],
    ['M', [3, 4]],
    ['Z', []]
  ]);
  assert.equal(d, 'M1,2 M3,4 Z');

  d = getPathDFromSegments([
    ['M', [1, 2]],
    ['C', [3, 4, 5, 6]],
    ['Z', []]
  ]);
  assert.equal(d, 'M1,2 C3,4 5,6 Z');
});

QUnit.test('Test getPathDFromElement', function (assert) {
  const {getPathDFromElement} = utilities;

  let elem = mockCreateSVGElement({
    element: 'path',
    attr: {id: 'path', d: 'M0,1 Z'}
  });
  svgroot.append(elem);
  assert.equal(getPathDFromElement(elem), 'M0,1 Z');
  elem.remove();

  elem = mockCreateSVGElement({
    element: 'rect',
    attr: {id: 'rect', x: '0', y: '1', width: '5', height: '10'}
  });
  svgroot.append(elem);
  assert.equal(getPathDFromElement(elem), 'M0,1 L5,1 L5,11 L0,11 L0,1 Z');
  elem.remove();

  elem = mockCreateSVGElement({
    element: 'rect',
    attr: {id: 'roundrect', x: '0', y: '1', rx: '2', ry: '3', width: '10', height: '11'}
  });
  svgroot.append(elem);
  const closeEnough = /M0,4 C0,2.3\d* 0.9\d*,1 2,1 L8,1 C9.0\d*,1 10,2.3\d* 10,4 L10,9 C10,10.6\d* 9.08675799086758,12 8,12 L2,12 C0.9\d*,12 0,10.6\d* 0,9 L0,4 Z/;
  assert.equal(closeEnough.test(getPathDFromElement(elem)), true);
  elem.remove();

  elem = mockCreateSVGElement({
    element: 'line',
    attr: {id: 'line', x1: '0', y1: '1', x2: '5', y2: '6'}
  });
  svgroot.append(elem);
  assert.equal(getPathDFromElement(elem), 'M0,1L5,6');
  elem.remove();

  elem = mockCreateSVGElement({
    element: 'circle',
    attr: {id: 'circle', cx: '10', cy: '11', rx: '5', ry: '10'}
  });
  svgroot.append(elem);
  assert.equal(getPathDFromElement(elem), 'M10,11 C10,11 10,11 10,11 C10,11 10,11 10,11 C10,11 10,11 10,11 C10,11 10,11 10,11 Z');
  elem.remove();

  elem = mockCreateSVGElement({
    element: 'polyline',
    attr: {id: 'polyline', points: '0,1 5,1 5,11 0,11'}
  });
  svgroot.append(elem);
  assert.equal(getPathDFromElement(elem), 'M0,1 5,1 5,11 0,11');
  elem.remove();

  assert.equal(getPathDFromElement({tagName: 'something unknown'}), undefined);
});

QUnit.test('Test getBBoxOfElementAsPath', function (assert) {
  /**
   * Wrap `utilities.getBBoxOfElementAsPath` to convert bbox to object for testing.
   * @type {module:utilities.getBBoxOfElementAsPath}
   */
  function getBBoxOfElementAsPath (elem, addSVGElementFromJson, pathActions) {
    const bbox = utilities.getBBoxOfElementAsPath(elem, addSVGElementFromJson, pathActions);
    return utilities.bboxToObj(bbox); // need this for assert.equal() to work.
  }

  let elem = mockCreateSVGElement({
    element: 'path',
    attr: {id: 'path', d: 'M0,1 Z'}
  });
  svgroot.append(elem);
  let bbox = getBBoxOfElementAsPath(elem, mockaddSVGElementFromJson, mockPathActions);
  assert.deepEqual(bbox, {x: 0, y: 1, width: 0, height: 0});
  elem.remove();

  elem = mockCreateSVGElement({
    element: 'rect',
    attr: {id: 'rect', x: '0', y: '1', width: '5', height: '10'}
  });
  svgroot.append(elem);
  bbox = getBBoxOfElementAsPath(elem, mockaddSVGElementFromJson, mockPathActions);
  assert.deepEqual(bbox, {x: 0, y: 1, width: 5, height: 10});
  elem.remove();

  elem = mockCreateSVGElement({
    element: 'line',
    attr: {id: 'line', x1: '0', y1: '1', x2: '5', y2: '6'}
  });
  svgroot.append(elem);
  bbox = getBBoxOfElementAsPath(elem, mockaddSVGElementFromJson, mockPathActions);
  assert.deepEqual(bbox, {x: 0, y: 1, width: 5, height: 5});
  elem.remove();

  // TODO: test element with transform. Need resetOrientation above to be working or mock it.
});

QUnit.test('Test convertToPath rect', function (assert) {
  const {convertToPath} = utilities;
  const attrs = {
    fill: 'red',
    stroke: 'white',
    'stroke-width': '1',
    visibility: 'hidden'
  };

  const elem = mockCreateSVGElement({
    element: 'rect',
    attr: {id: 'rect', x: '0', y: '1', width: '5', height: '10'}
  });
  svgroot.append(elem);
  const path = convertToPath(elem, attrs, mockaddSVGElementFromJson, mockPathActions, mockClearSelection, mockAddToSelection, mockHistory, mockAddCommandToHistory);
  assert.equal(path.getAttribute('d'), 'M0,1 L5,1 L5,11 L0,11 L0,1 Z');
  assert.equal(path.getAttribute('visibilituy'), null);
  assert.equal(path.id, 'rect');
  assert.equal(path.parentNode, svgroot);
  assert.equal(elem.parentNode, null);
  assert.equal(mockHistorySubCommands.length, 2);
  assert.equal(mockCount.clearSelection, 1);
  assert.equal(mockCount.addToSelection, 1);
  assert.equal(mockCount.addCommandToHistory, 1);
  path.remove();
});

QUnit.test('Test convertToPath unknown element', function (assert) {
  const {convertToPath} = utilities;
  const attrs = {
    fill: 'red',
    stroke: 'white',
    'stroke-width': '1',
    visibility: 'hidden'
  };

  const elem = {
    tagName: 'something unknown',
    id: 'something-unknown',
    getAttribute (attr) { return ''; },
    parentNode: svgroot
  };
  const path = convertToPath(elem, attrs, mockaddSVGElementFromJson, mockPathActions, mockClearSelection, mockAddToSelection, mockHistory, mockAddCommandToHistory);
  assert.equal(path, null);
  assert.equal(elem.parentNode, svgroot);
  assert.equal(mockHistorySubCommands.length, 0);
  assert.equal(mockCount.clearSelection, 0);
  assert.equal(mockCount.addToSelection, 0);
  assert.equal(mockCount.addCommandToHistory, 0);
});