'use strict';

describe('ng:include', function() {
  var element;


  afterEach(function(){
    dealoc(element);
  });


  function putIntoCache(url, content) {
    return function($templateCache) {
      $templateCache.put(url, [200, content, {}]);
    };
  }


  it('should include on external file', inject(putIntoCache('myUrl', '{{name}}'),
      function($rootScope, $compile, $browser) {
    element = jqLite('<ng:include src="url" scope="childScope"></ng:include>');
    element = $compile(element)($rootScope);
    $rootScope.childScope = $rootScope.$new();
    $rootScope.childScope.name = 'misko';
    $rootScope.url = 'myUrl';
    $rootScope.$digest();
    expect(element.text()).toEqual('misko');
  }));


  it('should remove previously included text if a falsy value is bound to src', inject(
        putIntoCache('myUrl', '{{name}}'),
        function($rootScope, $compile, $browser) {
    element = jqLite('<ng:include src="url" scope="childScope"></ng:include>');
    element = $compile(element)($rootScope);
    $rootScope.childScope = $rootScope.$new();
    $rootScope.childScope.name = 'igor';
    $rootScope.url = 'myUrl';
    $rootScope.$digest();

    expect(element.text()).toEqual('igor');

    $rootScope.url = undefined;
    $rootScope.$digest();

    expect(element.text()).toEqual('');
  }));


  it('should allow this for scope', inject(putIntoCache('myUrl', '{{"abc"}}'),
        function($rootScope, $compile, $browser) {
    element = jqLite('<ng:include src="url" scope="this"></ng:include>');
    element = $compile(element)($rootScope);
    $rootScope.url = 'myUrl';
    $rootScope.$digest();

    // TODO(misko): because we are using scope==this, the eval gets registered
    // during the flush phase and hence does not get called.
    // I don't think passing 'this' makes sense. Does having scope on ng:include makes sense?
    // should we make scope="this" illegal?
    $rootScope.$digest();

    expect(element.text()).toEqual('abc');
  }));


  it('should fire $includeContentLoaded event after linking the content', inject(
      function($rootScope, $compile, $templateCache) {
    var contentLoadedSpy = jasmine.createSpy('content loaded').andCallFake(function() {
      expect(element.text()).toBe('partial content');
    });

    $templateCache.put('url', [200, 'partial content', {}]);
    $rootScope.$on('$includeContentLoaded', contentLoadedSpy);

    element = $compile('<ng:include src="\'url\'"></ng:include>')($rootScope);
    $rootScope.$digest();

    expect(contentLoadedSpy).toHaveBeenCalledOnce();
  }));


  it('should evaluate onload expression when a partial is loaded', inject(
      putIntoCache('myUrl', 'my partial'),
      function($rootScope, $compile, $browser) {
    element = jqLite('<ng:include src="url" onload="loaded = true"></ng:include>');
    element = $compile(element)($rootScope);

    expect($rootScope.loaded).not.toBeDefined();

    $rootScope.url = 'myUrl';
    $rootScope.$digest();

    expect(element.text()).toEqual('my partial');
    expect($rootScope.loaded).toBe(true);
  }));


  it('should destroy old scope', inject(putIntoCache('myUrl', 'my partial'),
        function($rootScope, $compile, $browser) {
    element = jqLite('<ng:include src="url"></ng:include>');
    element = $compile(element)($rootScope);

    expect($rootScope.$$childHead).toBeFalsy();

    $rootScope.url = 'myUrl';
    $rootScope.$digest();
    expect($rootScope.$$childHead).toBeTruthy();

    $rootScope.url = null;
    $rootScope.$digest();
    expect($rootScope.$$childHead).toBeFalsy();
  }));


  it('should do xhr request and cache it',
      inject(function($rootScope, $httpBackend, $compile, $browser) {
    element = $compile('<ng:include src="url"></ng:include>')($rootScope);
    $httpBackend.expect('GET', 'myUrl').respond('my partial');

    $rootScope.url = 'myUrl';
    $rootScope.$digest();
    $httpBackend.flush();
    expect(element.text()).toEqual('my partial');

    $rootScope.url = null;
    $rootScope.$digest();
    expect(element.text()).toEqual('');

    $rootScope.url = 'myUrl';
    $rootScope.$digest();
    expect(element.text()).toEqual('my partial');
    dealoc($rootScope);
  }));


  it('should clear content when error during xhr request',
      inject(function($httpBackend, $compile, $rootScope) {
    element = $compile('<ng:include src="url">content</ng:include>')($rootScope);
    $httpBackend.expect('GET', 'myUrl').respond(404, '');

    $rootScope.url = 'myUrl';
    $rootScope.$digest();
    $httpBackend.flush();

    expect(element.text()).toBe('');
  }));


  it('should be async even if served from cache', inject(
        putIntoCache('myUrl', 'my partial'),
        function($rootScope, $compile, $browser) {
    element = $compile('<ng:include src="url"></ng:include>')($rootScope);

    $rootScope.url = 'myUrl';

    var called = 0;
    // we want to assert only during first watch
    $rootScope.$watch(function() {
      if (!called++) expect(element.text()).toBe('');
    });

    $rootScope.$digest();
    expect(element.text()).toBe('my partial');
  }));


  it('should discard pending xhr callbacks if a new template is requested before the current ' +
      'finished loading', inject(function($rootScope, $compile, $httpBackend) {
    element = jqLite("<ng:include src='templateUrl'></ng:include>");
    var log = [];

    $rootScope.templateUrl = 'myUrl1';
    $rootScope.logger = function(msg) {
      log.push(msg);
    }
    $compile(element)($rootScope);
    expect(log.join('; ')).toEqual('');

    $httpBackend.expect('GET', 'myUrl1').respond('<div>{{logger("url1")}}</div>');
    $rootScope.$digest();
    expect(log.join('; ')).toEqual('');
    $rootScope.templateUrl = 'myUrl2';
    $httpBackend.expect('GET', 'myUrl2').respond('<div>{{logger("url2")}}</div>');
    $rootScope.$digest();
    $httpBackend.flush(); // now that we have two requests pending, flush!

    expect(log.join('; ')).toEqual('url2; url2'); // it's here twice because we go through at
                                                  // least two digest cycles
  }));


  it('should compile only the content', inject(function($compile, $rootScope, $templateCache) {
    // regression

    var onload = jasmine.createSpy('$includeContentLoaded');
    $rootScope.$on('$includeContentLoaded', onload);
    $templateCache.put('tpl.html', [200, 'partial {{tpl}}', {}]);

    element = $compile('<div><div ng:repeat="i in [1]">' +
        '<ng:include src="tpl"></ng:include></div></div>')($rootScope);
    expect(onload).not.toHaveBeenCalled();

    $rootScope.$apply(function() {
      $rootScope.tpl = 'tpl.html';
    });
    expect(onload).toHaveBeenCalledOnce();
  }));


  describe('autoscoll', function() {
    var autoScrollSpy;

    function spyOnAnchorScroll() {
      return function($provide) {
        autoScrollSpy = jasmine.createSpy('$anchorScroll');
        $provide.value('$anchorScroll', autoScrollSpy);
      };
    }

    function compileAndLink(tpl) {
      return function($compile, $rootScope) {
        element = $compile(tpl)($rootScope);
      };
    }

    function changeTplAndValueTo(template, value) {
      return function($rootScope, $browser) {
        $rootScope.$apply(function() {
          $rootScope.tpl = template;
          $rootScope.value = value;
        });
      };
    }

    beforeEach(module(spyOnAnchorScroll()));
    beforeEach(inject(
        putIntoCache('template.html', 'CONTENT'),
        putIntoCache('another.html', 'CONTENT')));


    it('should call $anchorScroll if autoscroll attribute is present', inject(
        compileAndLink('<ng:include src="tpl" autoscroll></ng:include>'),
        changeTplAndValueTo('template.html'), function() {
      expect(autoScrollSpy).toHaveBeenCalledOnce();
    }));


    it('should call $anchorScroll if autoscroll evaluates to true', inject(
        compileAndLink('<ng:include src="tpl" autoscroll="value"></ng:include>'),
        changeTplAndValueTo('template.html', true),
        changeTplAndValueTo('another.html', 'some-string'),
        changeTplAndValueTo('template.html', 100), function() {
      expect(autoScrollSpy).toHaveBeenCalled();
      expect(autoScrollSpy.callCount).toBe(3);
    }));


    it('should not call $anchorScroll if autoscroll attribute is not present', inject(
        compileAndLink('<ng:include src="tpl"></ng:include>'),
        changeTplAndValueTo('template.html'), function() {
      expect(autoScrollSpy).not.toHaveBeenCalled();
    }));


    it('should not call $anchorScroll if autoscroll evaluates to false', inject(
        compileAndLink('<ng:include src="tpl" autoscroll="value"></ng:include>'),
        changeTplAndValueTo('template.html', false),
        changeTplAndValueTo('template.html', undefined),
        changeTplAndValueTo('template.html', null), function() {
      expect(autoScrollSpy).not.toHaveBeenCalled();
    }));
  });
});