/* eslint-disable max-len, no-console */
import SvgCanvas from '../../../instrumented/svgcanvas/svgcanvas.js';

describe('Basic Module', function () {
  // helper functions
  /*
  const isIdentity = function (m) {
    return (m.a === 1 && m.b === 0 && m.c === 0 && m.d === 1 && m.e === 0 && m.f === 0);
  };
  const matrixString = function (m) {
    return [m.a, m.b, m.c, m.d, m.e, m.f].join(',');
  };
  */

  let svgCanvas;

  const
    // svgroot = document.getElementById('svgroot'),
    // svgdoc = svgroot.documentElement,
    svgns = 'http://www.w3.org/2000/svg';
  const xlinkns = 'http://www.w3.org/1999/xlink';

  beforeEach(() => {
    document.body.textContent = '';
    const svgEditor = document.createElement('div');
    svgEditor.id = 'svg_editor';
    const svgcanvas = document.createElement('div');
    svgcanvas.style.visibility = 'hidden';
    svgcanvas.id = 'svgcanvas';
    const workarea = document.createElement('div');
    workarea.id = 'workarea';
    workarea.append(svgcanvas);
    const toolsLeft = document.createElement('div');
    toolsLeft.id = 'tools_left';

    svgEditor.append(workarea, toolsLeft);
    document.body.append(svgEditor);

    svgCanvas = new SvgCanvas(
      document.getElementById('svgcanvas'), {
        canvas_expansion: 3,
        dimensions: [ 640, 480 ],
        initFill: {
          color: 'FF0000', // solid red
          opacity: 1
        },
        initStroke: {
          width: 5,
          color: '000000', // solid black
          opacity: 1
        },
        initOpacity: 1,
        imgPath: '../editor/images',
        langPath: 'locale/',
        extPath: 'extensions/',
        extensions: [ 'ext-arrows.js', 'ext-connector.js', 'ext-eyedropper.js' ],
        initTool: 'select',
        wireframe: false
      }
    );
  });

  it('Test existence of SvgCanvas object', function () {
    assert.equal(typeof {}, typeof svgCanvas);
  });

  describe('Path Module', function () {
    it('Test path conversion from absolute to relative', function () {
      const convert = svgCanvas.pathActions.convertPath;

      // TODO: Test these paths:
      // "m400.00491,625.01379a1.78688,1.78688 0 1 1-3.57373,0a1.78688,1.78688 0 1 13.57373,0z"
      // "m36.812,15.8566c-28.03099,0 -26.28099,12.15601 -26.28099,12.15601l0.03099,12.59399h26.75v3.781h-37.37399c0,0 -17.938,-2.034 -133.00001,26.25c115.06201,28.284 130.71801,27.281 130.71801,27.281h9.34399v-13.125c0,0 -0.504,-15.656 15.40601,-15.656h26.532c0,0 14.90599,0.241 14.90599,-14.406v-24.219c0,0 2.263,-14.65601 -27.032,-14.65601zm-14.75,8.4684c2.662,0 4.813,2.151 4.813,4.813c0,2.661 -2.151,4.812 -4.813,4.812c-2.661,0 -4.812,-2.151 -4.812,-4.812c0,-2.662 2.151,-4.813 4.812,-4.813z"
      // "m 0,0 l 200,0 l 0,100 L 0,100"

      svgCanvas.setSvgString(
        "<svg xmlns='http://www.w3.org/2000/svg' width='400' x='300'>" +
          "<path id='p1' d='M100,100 L200,100 L100,100Z'/>" +
          "<path id='p2' d='m 0,0 l 200,0 l 0,100 L 0,100'/>" +
        '</svg>'
      );

      const p1 = document.getElementById('p1');
      const p2 = document.getElementById('p2');
      const dAbs = p1.getAttribute('d');
      const seglist = p1.pathSegList;

      assert.equal(p1.nodeName, 'path', "Expected 'path', got");

      assert.equal(seglist.numberOfItems, 4, 'Number of segments before conversion');

      // verify segments before conversion
      let curseg = seglist.getItem(0);
      assert.equal(curseg.pathSegTypeAsLetter.toUpperCase(), 'M', 'Before conversion, segment #1 type');
      curseg = seglist.getItem(1);
      assert.equal(curseg.pathSegTypeAsLetter.toUpperCase(), 'L', 'Before conversion, segment #2 type');
      curseg = seglist.getItem(3);
      assert.equal(curseg.pathSegTypeAsLetter.toUpperCase(), 'Z', 'Before conversion, segment #3 type' + dAbs);

      // convert and verify segments
      let d = convert(p1, true);
      assert.equal(d, 'm100,100l100,0l-100,0z', 'Converted path to relative string');

      // TODO: see why this isn't working in SVG-edit
      d = convert(p2, true);
      console.log('Convert true', d);
      d = convert(p2, false);
      console.log('Convert false', d);
    });
  });

  describe('Import Module', function () {
    it('Test import use', function () {
      svgCanvas.setSvgString(
        "<svg xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' width='400' x='300'>" +
          "<rect id='the-rect' width='200' height='200'/>" +
          "<use id='the-use' xlink:href='#the-rect'/>" +
          "<use id='foreign-use' xlink:href='somefile.svg#the-rect'/>" +
          "<use id='no-use'/>" +
        '</svg>'
      );

      const u = document.getElementById('the-use');
      const fu = document.getElementById('foreign-use');
      const nfu = document.getElementById('no-use');

      assert.equal((u && u.nodeName), 'use', 'Did not import <use> element');
      assert.equal(fu, null, 'Removed <use> element that had a foreign href');
      assert.equal(nfu, null, 'Removed <use> element that had no href');
    });

    // This test shows that an element with an invalid attribute is still parsed in properly
    // and only the attribute is not imported
    it('Test invalid attribute', function () {
      svgCanvas.setSvgString(
        '<svg width="640" height="480" xmlns="http://www.w3.org/2000/svg">' +
          '<text x="182.75" y="173.5" id="the-text" fill="#008000" font-size="150" font-family="serif" text-anchor="middle" d="M116,222 L110,108">words</text>' +
        '</svg>'
      );

      const t = document.getElementById('the-text');

      assert.equal((t && t.nodeName), 'text', 'Did not import <text> element');
      assert.equal(t.getAttribute('d'), null, 'Imported a <text> with a d attribute');
    });

    // This test makes sure import/export properly handles namespaced attributes
    it('Test importing/exporting namespaced attributes', function () {
      /* const setStr = */ svgCanvas.setSvgString(
        '<svg width="640" height="480" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:se="http://svg-edit.googlecode.com" xmlns:foo="http://example.com">' +
          '<image xlink:href="../editor/images/logo.png"/>' +
          '<polyline id="se_test_elem" se:foo="bar" foo:bar="baz"/>' +
        '</svg>'
      );
      const attrVal = document.getElementById('se_test_elem').getAttributeNS('http://svg-edit.googlecode.com', 'foo');

      assert.strictEqual(attrVal, 'bar', true, 'Preserved namespaced attribute on import');

      const output = svgCanvas.getSvgString();
      const hasXlink = output.includes('xmlns:xlink="http://www.w3.org/1999/xlink"');
      const hasSe = output.includes('xmlns:se=');
      const hasFoo = output.includes('xmlns:foo=');
      const hasAttr = output.includes('se:foo="bar"');

      assert.equal(hasAttr, true, 'Preserved namespaced attribute on export');
      assert.equal(hasXlink, true, 'Included xlink: xmlns');
      assert.equal(hasSe, true, 'Included se: xmlns');
      assert.equal(hasFoo, false, 'Did not include foo: xmlns');
    });

    it('Test import math elements inside a foreignObject', function () {
      /* const set = */ svgCanvas.setSvgString(
        '<svg width="640" height="480" xmlns="http://www.w3.org/2000/svg" xmlns:se="http://svg-edit.googlecode.com" xmlns:xlink="http://www.w3.org/1999/xlink">' +
          '<foreignObject id="fo" width="24" height="26" font-size="24"><math id="m" display="inline" xmlns="http://www.w3.org/1998/Math/MathML">' +
              '<msub>' +
                '<mi>A</mi>' +
                '<mn>0</mn>' +
              '</msub>' +
            '</math>' +
          '</foreignObject>' +
        '</svg>'
      );
      const fo = document.getElementById('fo');
      // we cannot use getElementById('math') because not all browsers understand MathML and do not know to use the @id attribute
      // see Bug https://bugs.webkit.org/show_bug.cgi?id=35042
      const math = fo.firstChild;

      assert.equal(Boolean(math), true, 'Math element exists');
      assert.equal(math.nodeName, 'math', 'Math element has the proper nodeName');
      assert.equal(math.getAttribute('id'), 'm', 'Math element has an id');
      assert.equal(math.namespaceURI, 'http://www.w3.org/1998/Math/MathML', 'Preserved MathML namespace');
    });

    it('Test importing SVG into existing drawing', function () {
      /* const doc = */ svgCanvas.setSvgString(
        '<svg width="640" height="480" xmlns="http://www.w3.org/2000/svg">' +
          '<g><title>Layer 1</title>' +
            '<circle cx="200" cy="200" r="50" fill="blue"/>' +
            '<ellipse cx="300" cy="100" rx="40" ry="30" fill="green"/>' +
          '</g>' +
        '</svg>'
      );

      svgCanvas.importSvgString(
        '<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg">' +
          '<circle cx="50" cy="50" r="40" fill="yellow"/>' +
          '<rect width="20" height="20" fill="blue"/>' +
        '</svg>'
      );

      const svgcontent = document.getElementById('svgcontent');
      const circles = svgcontent.getElementsByTagNameNS(svgns, 'circle');
      const rects = svgcontent.getElementsByTagNameNS(svgns, 'rect');
      const ellipses = svgcontent.getElementsByTagNameNS(svgns, 'ellipse');
      assert.equal(circles.length, 2, 'Found two circles upon importing');
      assert.equal(rects.length, 1, 'Found one rectangle upon importing');
      assert.equal(ellipses.length, 1, 'Found one ellipse upon importing');
    });

    it('Test importing SVG remaps IDs', function () {
      /* const doc = */ svgCanvas.setSvgString(
        '<svg width="640" height="480" xmlns="http://www.w3.org/2000/svg">' +
          '<g><title>Layer 1</title>' +
            '<ellipse id="svg_1" cx="200" cy="200" rx="50" ry="20" fill="blue"/>' +
            '<ellipse id="svg_2" cx="300" cy="100" rx="40" ry="30" fill="green"/>' +
            '<ellipse id="svg_3" cx="300" cy="100" rx="40" ry="30" fill="green"/>' +
          '</g>' +
        '</svg>'
      );

      svgCanvas.importSvgString(
        '<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg" xmlns:xl="http://www.w3.org/1999/xlink">' +
          '<defs>' +
            '<linearGradient id="svg_2">' +
              '<stop stop-color="red" offset="0"/>' +
              '<stop stop-color="green" offset="1"/>' +
            '</linearGradient>' +
            '<rect id="svg_3" width="20" height="20" fill="blue" stroke="url(#svg_2)"/>' +
          '</defs>' +
          '<circle id="svg_1" cx="50" cy="50" r="40" fill="url(#svg_2)"/>' +
          '<use id="svg_4" width="30" height="30" xl:href="#svg_3"/>' +
        '</svg>'
      );

      const svgcontent = document.getElementById('svgcontent');
      const circles = svgcontent.getElementsByTagNameNS(svgns, 'circle');
      const rects = svgcontent.getElementsByTagNameNS(svgns, 'rect');
      // ellipses = svgcontent.getElementsByTagNameNS(svgns, 'ellipse'),
      const defs = svgcontent.getElementsByTagNameNS(svgns, 'defs');
      // grads = svgcontent.getElementsByTagNameNS(svgns, 'linearGradient'),
      const uses = svgcontent.getElementsByTagNameNS(svgns, 'use');
      assert.notEqual(circles.item(0).id, 'svg_1', 'Circle not re-identified');
      assert.notEqual(rects.item(0).id, 'svg_3', 'Rectangle not re-identified');
      // TODO: determine why this test fails in WebKit browsers
      // assert.equal(grads.length, 1, 'Linear gradient imported');
      const grad = defs.item(0).firstChild;
      assert.notEqual(grad.id, 'svg_2', 'Linear gradient not re-identified');
      assert.notEqual(circles.item(0).getAttribute('fill'), 'url(#svg_2)', 'Circle fill value not remapped');
      assert.notEqual(rects.item(0).getAttribute('stroke'), 'url(#svg_2)', 'Rectangle stroke value not remapped');
      assert.notEqual(uses.item(0).getAttributeNS(xlinkns, 'href'), '#svg_3');
    });
  });
});