import {
  AsyncTestCompleter,
  beforeEach,
  ddescribe,
  describe,
  el,
  expect,
  iit,
  inject,
  IS_DARTIUM,
  it,
} from 'angular2/test_lib';

import {DOM} from 'angular2/src/dom/dom_adapter';
import {List, ListWrapper, Map, MapWrapper, StringMapWrapper} from 'angular2/src/facade/collection';
import {Type, isBlank, stringify, isPresent} from 'angular2/src/facade/lang';
import {PromiseWrapper, Promise} from 'angular2/src/facade/async';

import {DomCompiler} from 'angular2/src/render/dom/compiler/compiler';
import {ProtoViewDto, ViewDefinition, DirectiveMetadata} from 'angular2/src/render/api';
import {CompileElement} from 'angular2/src/render/dom/compiler/compile_element';
import {CompileStep} from 'angular2/src/render/dom/compiler/compile_step'
import {CompileStepFactory} from 'angular2/src/render/dom/compiler/compile_step_factory';
import {CompileControl} from 'angular2/src/render/dom/compiler/compile_control';
import {TemplateLoader} from 'angular2/src/render/dom/compiler/template_loader';

import {UrlResolver} from 'angular2/src/services/url_resolver';

import {resolveInternalDomProtoView} from 'angular2/src/render/dom/view/proto_view';

export function runCompilerCommonTests() {
  describe('DomCompiler', function() {
    var mockStepFactory;

    function createCompiler(processClosure, urlData = null) {
      if (isBlank(urlData)) {
        urlData = MapWrapper.create();
      }
      var tplLoader =  new FakeTemplateLoader(urlData);
      mockStepFactory = new MockStepFactory([new MockStep(processClosure)]);
      return new DomCompiler(mockStepFactory, tplLoader);
    }

    describe('compile', () => {

      it('should run the steps and build the AppProtoView of the root element', inject([AsyncTestCompleter], (async) => {
        var compiler = createCompiler((parent, current, control) => {
          current.inheritedProtoView.bindVariable('b', 'a');
        });
        compiler.compile(new ViewDefinition({
          componentId: 'someComponent',
          template: '<div></div>'
        })).then( (protoView) => {
          expect(protoView.variableBindings).toEqual(MapWrapper.createFromStringMap({
            'a': 'b'
          }));
          async.done();
        });
      }));

      it('should run the steps and build the proto view', inject([AsyncTestCompleter], (async) => {
        var compiler = createCompiler((parent, current, control) => {
          current.inheritedProtoView.bindVariable('b', 'a');
        });

        var dirMetadata = new DirectiveMetadata({id: 'id', selector: 'CUSTOM', type: DirectiveMetadata.COMPONENT_TYPE});
        compiler.compileHost(dirMetadata).then( (protoView) => {
          expect(DOM.tagName(resolveInternalDomProtoView(protoView.render).element)).toEqual('CUSTOM')
          expect(mockStepFactory.viewDef.directives).toEqual([dirMetadata]);
          expect(protoView.variableBindings).toEqual(MapWrapper.createFromStringMap({
            'a': 'b'
          }));
          async.done();
        });
      }));

      it('should use the inline template and compile in sync', inject([AsyncTestCompleter], (async) => {
        var compiler = createCompiler(EMPTY_STEP);
        compiler.compile(new ViewDefinition({
          componentId: 'someId',
          template: 'inline component'
        })).then( (protoView) => {
          expect(DOM.getInnerHTML(resolveInternalDomProtoView(protoView.render).element)).toEqual('inline component');
          async.done();
        });
      }));

      it('should load url templates', inject([AsyncTestCompleter], (async) => {
        var urlData = MapWrapper.createFromStringMap({
          'someUrl': 'url component'
        });
        var compiler = createCompiler(EMPTY_STEP, urlData);
        compiler.compile(new ViewDefinition({
          componentId: 'someId',
          absUrl: 'someUrl'
        })).then( (protoView) => {
          expect(DOM.getInnerHTML(resolveInternalDomProtoView(protoView.render).element)).toEqual('url component');
          async.done();
        });
      }));

      it('should report loading errors', inject([AsyncTestCompleter], (async) => {
        var compiler = createCompiler(EMPTY_STEP, MapWrapper.create());
        PromiseWrapper.catchError(compiler.compile(new ViewDefinition({
          componentId: 'someId',
          absUrl: 'someUrl'
        })), (e) => {
          expect(e.message).toContain(`Failed to load the template "someId"`);
          async.done();
        });
      }));

      it('should wait for async subtasks to be resolved', inject([AsyncTestCompleter], (async) => {
        var subTasksCompleted = false;

        var completer = PromiseWrapper.completer();

        var compiler = createCompiler( (parent, current, control) => {
          ListWrapper.push(mockStepFactory.subTaskPromises, completer.promise.then((_) => {
            subTasksCompleted = true;
          }));
        });

        // It should always return a Promise because the subtask is async
        var pvPromise = compiler.compile(new ViewDefinition({
          componentId: 'someId',
          template: 'some component'
        }));
        expect(pvPromise).toBePromise();
        expect(subTasksCompleted).toEqual(false);

        // The Promise should resolve after the subtask is ready
        completer.resolve(null);
        pvPromise.then((protoView) => {
          expect(subTasksCompleted).toEqual(true);
          async.done();
        });
      }));

      it('should return ProtoViews of type COMPONENT_VIEW_TYPE', inject([AsyncTestCompleter], (async) => {
        var compiler = createCompiler(EMPTY_STEP);
        compiler.compile(new ViewDefinition({
          componentId: 'someId',
          template: 'inline component'
        })).then( (protoView) => {
          expect(protoView.type).toEqual(ProtoViewDto.COMPONENT_VIEW_TYPE);
          async.done();
        });
      }));

    });

    describe('compileHost', () => {

      it('should return ProtoViews of type HOST_VIEW_TYPE', inject([AsyncTestCompleter], (async) => {
        var compiler = createCompiler(EMPTY_STEP);
        compiler.compileHost(someComponent).then( (protoView) => {
          expect(protoView.type).toEqual(ProtoViewDto.HOST_VIEW_TYPE);
          async.done();
        });
      }));

    });

  });

}

class MockStepFactory extends CompileStepFactory {
  steps:List<CompileStep>;
  subTaskPromises:List<Promise>;
  viewDef:ViewDefinition;

  constructor(steps) {
    super();
    this.steps = steps;
  }
  createSteps(viewDef, subTaskPromises) {
    this.viewDef = viewDef;
    this.subTaskPromises = subTaskPromises;
    ListWrapper.forEach(this.subTaskPromises, (p) => ListWrapper.push(subTaskPromises, p) );
    return this.steps;
  }
}

class MockStep extends CompileStep {
  processClosure:Function;
  constructor(process) {
    super();
    this.processClosure = process;
  }
  process(parent:CompileElement, current:CompileElement, control:CompileControl) {
    this.processClosure(parent, current, control);
  }
}

var EMPTY_STEP = (parent, current, control) => {
  if (isPresent(parent)) {
    current.inheritedProtoView = parent.inheritedProtoView;
  }
};

class FakeTemplateLoader extends TemplateLoader {
  _urlData: Map<string, string>;
  constructor(urlData) {
    super(null, new UrlResolver());
    this._urlData = urlData;
  }

  load(template: ViewDefinition) {
    if (isPresent(template.template)) {
      return PromiseWrapper.resolve(DOM.createTemplate(template.template));
    }

    if (isPresent(template.absUrl)) {
      var content = MapWrapper.get(this._urlData, template.absUrl);
      if (isPresent(content)) {
        return PromiseWrapper.resolve(DOM.createTemplate(content));
      }
    }

    return PromiseWrapper.reject('Load failed');
  }
}

var someComponent = new DirectiveMetadata({
  selector: 'some-comp',
  id: 'someComponent',
  type: DirectiveMetadata.COMPONENT_TYPE
});