import * as utilities from '../../../packages/svgcanvas/core/utilities.js'
import { NS } from '../../../packages/svgcanvas/core/namespaces.js'

describe('utilities', function () {
  /**
   * 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 mockaddSVGElementsFromJson (json) {
    const elem = mockCreateSVGElement(json)
    svgroot.append(elem)
    return elem
  }
  const mockPathActions = { resetOrientation () { /* empty fn */ } }
  let mockHistorySubCommands = []
  const mockHistory = {
    BatchCommand: class {
      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 mockSvgCanvas = {
    addSVGElementsFromJson: mockaddSVGElementsFromJson,
    pathActions: mockPathActions,
    clearSelection: mockClearSelection,
    addToSelection: mockAddToSelection,
    history: mockHistory,
    addCommandToHistory: mockAddCommandToHistory
  }

  let svg; let svgroot
  beforeEach(() => {
    document.body.textContent = ''

    mockHistorySubCommands = []
    mockCount.clearSelection = 0
    mockCount.addToSelection = 0
    mockCount.addCommandToHistory = 0

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

  it('Test svgedit.utilities package', function () {
    assert.ok(utilities)
    assert.ok(utilities.toXml)
    assert.equal(typeof utilities.toXml, typeof function () { /* empty fn */ })
  })

  it('Test svgedit.utilities.toXml() function', function () {
    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;')
  })

  it('Test svgedit.utilities.encode64() function', function () {
    const { encode64 } = utilities

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

  it('Test svgedit.utilities.decode64() function', function () {
    const { decode64 } = utilities

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

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

  it('Test svgedit.utilities.bboxToObj() function', function () {
    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)
  })

  it('Test getUrlFromAttr', function () {
    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')
  })

  it('Test getPathDFromSegments', function () {
    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')
  })

  it('Test getPathDFromElement', function () {
    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* 9.0\d*,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), 'M5,11 C5,5.475138121546961 7.237569060773481,1 10,1 C12.762430939226519,1 15,5.475138121546961 15,11 C15,16.524861878453038 12.762430939226519,21 10,21 C7.237569060773481,21 5,16.524861878453038 5,11 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)
  })

  it('Test getBBoxOfElementAsPath', function () {
    /**
     * Wrap `utilities.getBBoxOfElementAsPath` to convert bbox to object for testing.
     * @type {module:utilities.getBBoxOfElementAsPath}
     */
    function getBBoxOfElementAsPath (elem, addSVGElementsFromJson, pathActions) {
      const bbox = utilities.getBBoxOfElementAsPath(elem, addSVGElementsFromJson, 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, mockaddSVGElementsFromJson, 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, mockaddSVGElementsFromJson, 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, mockaddSVGElementsFromJson, 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.
  })

  it('Test convertToPath rect', function () {
    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, mockSvgCanvas)
    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()
  })

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

    const elem = {
      tagName: 'something unknown',
      id: 'something-unknown',
      getAttribute () { return '' },
      parentNode: svgroot
    }
    const path = convertToPath(elem, attrs, mockSvgCanvas)
    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)
  })
})