var _ = require('../../../../src/util')
var templateParser = require('../../../../src/parse/template')
var parse = templateParser.parse
var testString = '<div>hello</div><p class="test">world</p>'

if (_.inBrowser) {

  describe('Template Parser', function () {
    
    it('should return same if argument is already a fragment', function () {
      var frag = document.createDocumentFragment()
      var res = parse(frag)
      expect(res).toBe(frag)
    })

    it('should return content if argument is a valid template node', function () {
      var templateNode = document.createElement('template')
      if (!templateNode.content) {
        // mock the content 
        templateNode.content = document.createDocumentFragment()
      }
      var res = parse(templateNode)
      expect(res).toBe(templateNode.content)
    })

    it('should parse if argument is a template string', function () {
      var res = parse(testString)
      expect(res instanceof DocumentFragment).toBeTruthy()
      expect(res.childNodes.length).toBe(2)
      expect(res.querySelector('.test').textContent).toBe('world')
    })

    it('should work if the template string doesn\'t contain tags', function () {
      var res = parse('hello!')
      expect(res instanceof DocumentFragment).toBeTruthy()
      expect(res.childNodes.length).toBe(1)
      expect(res.firstChild.nodeType).toBe(3) // Text node
    })

    it('should parse textContent if argument is a script node', function () {
      var node = document.createElement('script')
      node.textContent = testString
      var res = parse(node)
      expect(res instanceof DocumentFragment).toBeTruthy()
      expect(res.childNodes.length).toBe(2)
      expect(res.querySelector('.test').textContent).toBe('world')
    })

    it('should parse innerHTML if argument is a normal node', function () {
      var node = document.createElement('div')
      node.innerHTML = testString
      var res = parse(node)
      expect(res instanceof DocumentFragment).toBeTruthy()
      expect(res.childNodes.length).toBe(2)
      expect(res.querySelector('.test').textContent).toBe('world')
    })

    it('should retrieve and parse if argument is an id selector', function () {
      var node = document.createElement('script')
      node.setAttribute('id', 'template-test')
      node.setAttribute('type', 'x/template')
      node.textContent = testString
      document.head.appendChild(node)
      var res = parse('#template-test')
      expect(res instanceof DocumentFragment).toBeTruthy()
      expect(res.childNodes.length).toBe(2)
      expect(res.querySelector('.test').textContent).toBe('world')
      document.head.removeChild(node)
    })

    it('should work for table elements', function () {
      var res = parse('<td>hello</td>')
      expect(res instanceof DocumentFragment).toBeTruthy()
      expect(res.childNodes.length).toBe(1)
      expect(res.firstChild.tagName).toBe('TD')
      expect(res.firstChild.textContent).toBe('hello')
    })

    it('should work for option elements', function () {
      var res = parse('<option>hello</option>')
      expect(res instanceof DocumentFragment).toBeTruthy()
      expect(res.childNodes.length).toBe(1)
      expect(res.firstChild.tagName).toBe('OPTION')
      expect(res.firstChild.textContent).toBe('hello')
    })

    it('should work for svg elements', function () {
      var res = parse('<circle></circle>')
      expect(res instanceof DocumentFragment).toBeTruthy()
      expect(res.childNodes.length).toBe(1)
      // SVG tagNames should be lowercase because they are XML nodes not HTML
      expect(res.firstChild.tagName).toBe('circle')
      expect(res.firstChild.namespaceURI).toBe('http://www.w3.org/2000/svg')
    })

    it('should cache template strings', function () {
      var res1 = parse(testString)
      var res2 = parse(testString)
      expect(res1).toBe(res2)
    })

    it('should clone', function () {
      var res1 = parse(testString, true)
      var res2 = parse(testString, true)
      expect(res1).not.toBe(res2)
    })

    it('should cache id selectors', function () {
      var node = document.createElement('script')
      node.setAttribute('id', 'template-test')
      node.setAttribute('type', 'x/template')
      node.textContent = '<div>never seen before content</div>'
      document.head.appendChild(node)
      var res1 = parse('#template-test')
      var res2 = parse('#template-test')
      expect(res1).toBe(res2)
      document.head.removeChild(node)
    })
  })
}