import {Component, Injector} from '@angular/core';
import {
  describe,
  ddescribe,
  xdescribe,
  it,
  iit,
  xit,
  expect,
  beforeEach,
  beforeEachProviders,
  inject,
  fakeAsync,
  tick
} from '@angular/core/testing';

import {TestComponentBuilder, ComponentFixture} from '@angular/compiler/testing';
import { ComponentResolver } from '@angular/core';
import { SpyLocation } from '@angular/common/testing';
import { UrlSerializer, DefaultUrlSerializer, RouterOutletMap, Router, ActivatedRoute, ROUTER_DIRECTIVES, Params,
 RouterStateSnapshot, ActivatedRouteSnapshot, CanActivate, CanDeactivate, Event, NavigationStart, NavigationEnd, NavigationCancel, NavigationError, RouterConfig } from '../src/index';
import { Observable } from 'rxjs/Observable';
import 'rxjs/add/operator/map';
import {of} from 'rxjs/observable/of';

describe("Integration", () => {

  beforeEachProviders(() => {
    let config: RouterConfig = [
      { path: 'simple', component: SimpleCmp }
    ];

    return [
      RouterOutletMap,
      {provide: UrlSerializer, useClass: DefaultUrlSerializer},
      {provide: Location, useClass: SpyLocation},
      {
        provide: Router,
        useFactory: (resolver, urlSerializer, outletMap, location, injector) => {
          const r = new Router(RootCmp, resolver, urlSerializer, outletMap, location, injector, config);
          r.initialNavigation();
          return r;
        },
        deps: [ComponentResolver, UrlSerializer, RouterOutletMap, Location, Injector]
      },
      {provide: ActivatedRoute, useFactory: (r) => r.routerState.root, deps: [Router]},
    ];
  });

  it('should navigate with a provided config',
    fakeAsync(inject([Router, TestComponentBuilder, Location], (router, tcb, location) => {
      const fixture = tcb.createFakeAsync(RootCmp);
      advance(fixture);

      router.navigateByUrl('/simple');
      advance(fixture);
      expect(location.path()).toEqual('/simple');
    })));


  it('should update location when navigating',
    fakeAsync(inject([Router, TestComponentBuilder, Location], (router, tcb, location) => {
      router.resetConfig([
        { path: 'team/:id', component: TeamCmp }
      ]);

      const fixture = tcb.createFakeAsync(RootCmp);
      advance(fixture);

      router.navigateByUrl('/team/22');
      advance(fixture);
      expect(location.path()).toEqual('/team/22');

      router.navigateByUrl('/team/33');
      advance(fixture);

      expect(location.path()).toEqual('/team/33');
    })));

  xit('should navigate back and forward',
    fakeAsync(inject([Router, TestComponentBuilder, Location], (router, tcb, location) => {
      router.resetConfig([
        { path: 'team/:id', component: TeamCmp, children: [
          { path: 'simple', component: SimpleCmp },
          { path: 'user/:name', component: UserCmp }
        ] }
      ]);

      const fixture = tcb.createFakeAsync(RootCmp);

      router.navigateByUrl('/team/33/simple');
      advance(fixture);
      expect(location.path()).toEqual('/team/33/simple');

      router.navigateByUrl('/team/22/user/victor');
      advance(fixture);

      location.back();
      advance(fixture);
      expect(location.path()).toEqual('/team/33/simple');

      location.forward();
      advance(fixture);
      expect(location.path()).toEqual('/team/22/user/victor');
    })));

  it('should navigate when locations changes',
    fakeAsync(inject([Router, TestComponentBuilder, Location], (router, tcb, location) => {
      router.resetConfig([
        { path: 'team/:id', component: TeamCmp, children: [
          { path: 'user/:name', component: UserCmp }
        ] }
      ]);

      const fixture = tcb.createFakeAsync(RootCmp);

      router.navigateByUrl('/team/22/user/victor');
      advance(fixture);

      location.simulateHashChange("/team/22/user/fedor");
      advance(fixture);

      expect(fixture.debugElement.nativeElement).toHaveText('team 22 { user fedor, right:  }');
    })));

  it('should support secondary routes',
    fakeAsync(inject([Router, TestComponentBuilder], (router, tcb) => {
      router.resetConfig([
        { path: 'team/:id', component: TeamCmp, children: [
          { path: 'user/:name', component: UserCmp },
          { path: 'simple', component: SimpleCmp, outlet: 'right' }
        ] }
      ]);

      const fixture = tcb.createFakeAsync(RootCmp);

      router.navigateByUrl('/team/22/user/victor(right:simple)');
      advance(fixture);

      expect(fixture.debugElement.nativeElement)
        .toHaveText('team 22 { user victor, right: simple }');
    })));

  it('should deactivate outlets',
    fakeAsync(inject([Router, TestComponentBuilder], (router, tcb) => {
      router.resetConfig([
        { path: 'team/:id', component: TeamCmp, children: [
          { path: 'user/:name', component: UserCmp },
          { path: 'simple', component: SimpleCmp, outlet: 'right' }
        ] }
      ]);

      const fixture = tcb.createFakeAsync(RootCmp);

      router.navigateByUrl('/team/22/user/victor(right:simple)');
      advance(fixture);

      router.navigateByUrl('/team/22/user/victor');
      advance(fixture);

      expect(fixture.debugElement.nativeElement).toHaveText('team 22 { user victor, right:  }');
    })));

  it('should deactivate nested outlets',
    fakeAsync(inject([Router, TestComponentBuilder], (router, tcb) => {
      router.resetConfig([
        { path: 'team/:id', component: TeamCmp, children: [
          { path: 'user/:name', component: UserCmp },
          { path: 'simple', component: SimpleCmp, outlet: 'right' }
        ] }
      ]);

      const fixture = tcb.createFakeAsync(RootCmp);

      router.navigateByUrl('/team/22/user/victor(right:simple)');
      advance(fixture);

      router.navigateByUrl('/');
      advance(fixture);

      expect(fixture.debugElement.nativeElement).toHaveText('');
    })));

  it('should set query params and fragment',
    fakeAsync(inject([Router, TestComponentBuilder], (router, tcb) => {
      router.resetConfig([
        { path: 'query', component: QueryParamsAndFragmentCmp }
      ]);

      const fixture = tcb.createFakeAsync(RootCmp);

      router.navigateByUrl('/query?name=1#fragment1');
      advance(fixture);
      expect(fixture.debugElement.nativeElement).toHaveText('query: 1 fragment: fragment1');

      router.navigateByUrl('/query?name=2#fragment2');
      advance(fixture);
      expect(fixture.debugElement.nativeElement).toHaveText('query: 2 fragment: fragment2');
    })));

  it('should push params only when they change',
    fakeAsync(inject([Router, TestComponentBuilder], (router, tcb:TestComponentBuilder) => {
      router.resetConfig([
        { path: 'team/:id', component: TeamCmp, children: [
          { path: 'user/:name', component: UserCmp }
        ] }
      ]);

      const fixture = tcb.createFakeAsync(RootCmp);

      router.navigateByUrl('/team/22/user/victor');
      advance(fixture);
      const team = fixture.debugElement.children[1].componentInstance;
      const user = fixture.debugElement.children[1].children[1].componentInstance;

      expect(team.recordedParams).toEqual([{id: '22'}]);
      expect(user.recordedParams).toEqual([{name: 'victor'}]);

      router.navigateByUrl('/team/22/user/fedor');
      advance(fixture);

      expect(team.recordedParams).toEqual([{id: '22'}]);
      expect(user.recordedParams).toEqual([{name: 'victor'}, {name: 'fedor'}]);
    })));

  it('should work when navigating to /',
    fakeAsync(inject([Router, TestComponentBuilder], (router, tcb:TestComponentBuilder) => {
      router.resetConfig([
        { index: true, component: SimpleCmp },
        { path: '/user/:name', component: UserCmp }
      ]);

      const fixture = tcb.createFakeAsync(RootCmp);

      router.navigateByUrl('/user/victor');
      advance(fixture);

      expect(fixture.debugElement.nativeElement).toHaveText('user victor');

      router.navigateByUrl('/');
      advance(fixture);

      expect(fixture.debugElement.nativeElement).toHaveText('simple');
    })));

  it("should cancel in-flight navigations",
    fakeAsync(inject([Router, TestComponentBuilder], (router, tcb:TestComponentBuilder) => {
      router.resetConfig([
        { path: '/user/:name', component: UserCmp }
      ]);

      const recordedEvents = [];
      router.events.forEach(e => recordedEvents.push(e));

      const fixture = tcb.createFakeAsync(RootCmp);
      router.navigateByUrl('/user/init');
      advance(fixture);

      const user = fixture.debugElement.children[1].componentInstance;

      let r1, r2;
      router.navigateByUrl('/user/victor').then(_ => r1 = _);
      router.navigateByUrl('/user/fedor').then(_ => r2 = _);
      advance(fixture);

      expect(r1).toEqual(false); // returns false because it was canceled
      expect(r2).toEqual(true); // returns true because it was successful

      expect(fixture.debugElement.nativeElement).toHaveText('user fedor');
      expect(user.recordedParams).toEqual([{name: 'init'}, {name: 'fedor'}]);

      expectEvents(router, recordedEvents.slice(1), [
        [NavigationStart, '/user/init'],
        [NavigationEnd, '/user/init'],

        [NavigationStart, '/user/victor'],
        [NavigationStart, '/user/fedor'],

        [NavigationCancel, '/user/victor'],
        [NavigationEnd, '/user/fedor']
      ]);
    })));

  it("should handle failed navigations gracefully",
    fakeAsync(inject([Router, TestComponentBuilder], (router, tcb:TestComponentBuilder) => {
      router.resetConfig([
        { path: '/user/:name', component: UserCmp }
      ]);

      const recordedEvents = [];
      router.events.forEach(e => recordedEvents.push(e));

      const fixture = tcb.createFakeAsync(RootCmp);
      advance(fixture);

      let e;
      router.navigateByUrl('/invalid').catch(_ => e = _);
      advance(fixture);
      expect(e.message).toContain("Cannot match any routes");

      router.navigateByUrl('/user/fedor');
      advance(fixture);

      expect(fixture.debugElement.nativeElement).toHaveText('user fedor');
      expectEvents(router, recordedEvents.slice(1), [
        [NavigationStart, '/invalid'],
        [NavigationError, '/invalid'],

        [NavigationStart, '/user/fedor'],
        [NavigationEnd, '/user/fedor']
      ]);
    })));
  
  describe("router links", () => {
    it("should support string router links",
      fakeAsync(inject([Router, TestComponentBuilder], (router, tcb) => {
        router.resetConfig([
          { path: 'team/:id', component: TeamCmp, children: [
            { path: 'link', component: StringLinkCmp },
            { path: 'simple', component: SimpleCmp }
          ] }
        ]);

        const fixture = tcb.createFakeAsync(RootCmp);
        advance(fixture);

        router.navigateByUrl('/team/22/link');
        advance(fixture);
        expect(fixture.debugElement.nativeElement).toHaveText('team 22 { link, right:  }');

        const native = fixture.debugElement.nativeElement.querySelector("a");
        expect(native.getAttribute("href")).toEqual("/team/33/simple");
        native.click();
        advance(fixture);

        expect(fixture.debugElement.nativeElement).toHaveText('team 33 { simple, right:  }');
      })));

    it("should support absolute router links",
      fakeAsync(inject([Router, TestComponentBuilder], (router, tcb) => {
        router.resetConfig([
          { path: 'team/:id', component: TeamCmp, children: [
            { path: 'link', component: AbsoluteLinkCmp },
            { path: 'simple', component: SimpleCmp }
          ] }
        ]);

        const fixture = tcb.createFakeAsync(RootCmp);
        advance(fixture);

        router.navigateByUrl('/team/22/link');
        advance(fixture);
        expect(fixture.debugElement.nativeElement).toHaveText('team 22 { link, right:  }');

        const native = fixture.debugElement.nativeElement.querySelector("a");
        expect(native.getAttribute("href")).toEqual("/team/33/simple");
        native.click();
        advance(fixture);

        expect(fixture.debugElement.nativeElement).toHaveText('team 33 { simple, right:  }');
      })));

    it("should support relative router links",
      fakeAsync(inject([Router, TestComponentBuilder], (router, tcb) => {
        router.resetConfig([
          { path: 'team/:id', component: TeamCmp, children: [
            { path: 'link', component: RelativeLinkCmp },
            { path: 'simple', component: SimpleCmp }
          ] }
        ]);

        const fixture = tcb.createFakeAsync(RootCmp);
        advance(fixture);

        router.navigateByUrl('/team/22/link');
        advance(fixture);
        expect(fixture.debugElement.nativeElement)
          .toHaveText('team 22 { link, right:  }');

        const native = fixture.debugElement.nativeElement.querySelector("a");
        expect(native.getAttribute("href")).toEqual("/team/22/simple");
        native.click();
        advance(fixture);

        expect(fixture.debugElement.nativeElement)
          .toHaveText('team 22 { simple, right:  }');
      })));

    it("should support top-level link",
      fakeAsync(inject([Router, TestComponentBuilder], (router, tcb) => {
        let fixture = tcb.createFakeAsync(AbsoluteLinkCmp);
        advance(fixture);
        expect(fixture.debugElement.nativeElement).toHaveText('link');
      })));

    it("should support query params and fragments",
      fakeAsync(inject([Router, Location, TestComponentBuilder], (router, location, tcb) => {
        router.resetConfig([
          { path: 'team/:id', component: TeamCmp, children: [
            { path: 'link', component: LinkWithQueryParamsAndFragment },
            { path: 'simple', component: SimpleCmp }
          ] }
        ]);

        const fixture = tcb.createFakeAsync(RootCmp);
        advance(fixture);

        router.navigateByUrl('/team/22/link');
        advance(fixture);

        const native = fixture.debugElement.nativeElement.querySelector("a");
        expect(native.getAttribute("href")).toEqual("/team/22/simple?q=1#f");
        native.click();
        advance(fixture);

        expect(fixture.debugElement.nativeElement)
          .toHaveText('team 22 { simple, right:  }');

        expect(location.path()).toEqual('/team/22/simple?q=1#f');
      })));
  });

  describe("redirects", () => {
    it("should work", fakeAsync(inject([Router, TestComponentBuilder, Location], (router, tcb, location) => {
      router.resetConfig([
        { path: '/old/team/:id', redirectTo: 'team/:id' },
        { path: '/team/:id', component: TeamCmp }
      ]);

      const fixture = tcb.createFakeAsync(RootCmp);
      advance(fixture);

      router.navigateByUrl('old/team/22');
      advance(fixture);

      expect(location.path()).toEqual('/team/22');
    })));
  });

  describe("guards", () => {
    describe("CanActivate", () => {
      describe("should not activate a route when CanActivate returns false", () => {
        beforeEachProviders(() => [
          {provide: 'alwaysFalse', useValue: (a, b) => false}
        ]);

        it('works',
          fakeAsync(inject([Router, TestComponentBuilder, Location], (router, tcb, location) => {
            router.resetConfig([
              { path: 'team/:id', component: TeamCmp, canActivate: ["alwaysFalse"] }
            ]);

            const fixture = tcb.createFakeAsync(RootCmp);
            advance(fixture);

            router.navigateByUrl('/team/22');
            advance(fixture);

            expect(location.path()).toEqual('');
          })));
      });

      describe("should activate a route when CanActivate returns true", () => {
        beforeEachProviders(() => [
          {provide: 'alwaysTrue', useValue: (a:ActivatedRouteSnapshot, s:RouterStateSnapshot) => true}
        ]);

        it('works',
          fakeAsync(inject([Router, TestComponentBuilder, Location], (router, tcb, location) => {
            router.resetConfig([
              { path: 'team/:id', component: TeamCmp, canActivate: ["alwaysTrue"] }
            ]);

            const fixture = tcb.createFakeAsync(RootCmp);
            advance(fixture);

            router.navigateByUrl('/team/22');
            advance(fixture);

            expect(location.path()).toEqual('/team/22');
          })));
      });

      describe("should work when given a class", () => {
        class AlwaysTrue implements CanActivate {
          canActivate(route:ActivatedRouteSnapshot, state:RouterStateSnapshot):boolean {
            return true;
          }
        }

        beforeEachProviders(() => [AlwaysTrue]);

        it('works',
          fakeAsync(inject([Router, TestComponentBuilder, Location], (router, tcb, location) => {
            router.resetConfig([
              { path: 'team/:id', component: TeamCmp, canActivate: [AlwaysTrue] }
            ]);

            const fixture = tcb.createFakeAsync(RootCmp);
            advance(fixture);

            router.navigateByUrl('/team/22');
            advance(fixture);

            expect(location.path()).toEqual('/team/22');
          })));
      });

      describe("should work when returns an observable", () => {
        beforeEachProviders(() => [
          {provide: 'CanActivate', useValue: (a:ActivatedRouteSnapshot, b:RouterStateSnapshot) => {
            return of(false);
          }}
        ]);

        it('works',
          fakeAsync(inject([Router, TestComponentBuilder, Location], (router, tcb, location) => {
            router.resetConfig([
              { path: 'team/:id', component: TeamCmp, canActivate: ['CanActivate'] }
            ]);

            const fixture = tcb.createFakeAsync(RootCmp);
            advance(fixture);

            router.navigateByUrl('/team/22');
            advance(fixture);
            expect(location.path()).toEqual('');
          })));
       });
    });

    describe("CanDeactivate", () => {
      describe("should not deactivate a route when CanDeactivate returns false", () => {
        beforeEachProviders(() => [
          {provide: 'CanDeactivate', useValue: (c:TeamCmp, a:ActivatedRouteSnapshot, b:RouterStateSnapshot) => {
            return c.route.snapshot.params['id'] === "22";
          }}
        ]);


        it('works',
          fakeAsync(inject([Router, TestComponentBuilder, Location], (router, tcb, location) => {
            router.resetConfig([
              { path: 'team/:id', component: TeamCmp, canDeactivate: ["CanDeactivate"] }
            ]);

            const fixture = tcb.createFakeAsync(RootCmp);
            advance(fixture);

            router.navigateByUrl('/team/22');
            advance(fixture);

            expect(location.path()).toEqual('/team/22');

            router.navigateByUrl('/team/33');
            advance(fixture);

            expect(location.path()).toEqual('/team/33');

            router.navigateByUrl('/team/44');
            advance(fixture);

            expect(location.path()).toEqual('/team/33');
          })));
      });

      describe("should work when given a class", () => {
        class AlwaysTrue implements CanDeactivate<TeamCmp> {
          canDeactivate(component: TeamCmp, route:ActivatedRouteSnapshot, state:RouterStateSnapshot):boolean {
            return true;
          }
        }

        beforeEachProviders(() => [AlwaysTrue]);

        it('works',
          fakeAsync(inject([Router, TestComponentBuilder, Location], (router, tcb, location) => {
            router.resetConfig([
              { path: 'team/:id', component: TeamCmp, canDeactivate: [AlwaysTrue] }
            ]);

            const fixture = tcb.createFakeAsync(RootCmp);
            advance(fixture);

            router.navigateByUrl('/team/22');
            advance(fixture);
            expect(location.path()).toEqual('/team/22');

            router.navigateByUrl('/team/33');
            advance(fixture);
            expect(location.path()).toEqual('/team/33');
          })));
      });
    });

    describe("should work when returns an observable", () => {
      beforeEachProviders(() => [
        {provide: 'CanDeactivate', useValue: (c:TeamCmp, a:ActivatedRouteSnapshot, b:RouterStateSnapshot) => {
          return of(false);
        }}
      ]);

      it('works',
        fakeAsync(inject([Router, TestComponentBuilder, Location], (router, tcb, location) => {
          router.resetConfig([
            { path: 'team/:id', component: TeamCmp, canDeactivate: ['CanDeactivate'] }
          ]);

          const fixture = tcb.createFakeAsync(RootCmp);
          advance(fixture);

          router.navigateByUrl('/team/22');
          advance(fixture);
          expect(location.path()).toEqual('/team/22');

          router.navigateByUrl('/team/33');
          advance(fixture);
          expect(location.path()).toEqual('/team/22');
        })));
    });
  });
});

function expectEvents(router: Router, events:Event[], pairs: any[]) {
  for (let i = 0; i < events.length; ++i) {
    expect((<any>events[i].constructor).name).toBe(pairs[i][0].name);
    expect(router.serializeUrl((<any>events[i]).url)).toBe(pairs[i][1]);
  }
}

@Component({
  selector: 'link-cmp',
  template: `<a routerLink="/team/33/simple">link</a>`,
  directives: ROUTER_DIRECTIVES
})
class StringLinkCmp {}

@Component({
  selector: 'link-cmp',
  template: `<a [routerLink]="['/team/33/simple']">link</a>`,
  directives: ROUTER_DIRECTIVES
})
class AbsoluteLinkCmp {}

@Component({
  selector: 'link-cmp',
  template: `<a [routerLink]="['../simple']">link</a>`,
  directives: ROUTER_DIRECTIVES
})
class RelativeLinkCmp {}

@Component({
  selector: 'link-cmp',
  template: `<a [routerLink]="['../simple']" [queryParams]="{q: '1'}" fragment="f">link</a>`,
  directives: ROUTER_DIRECTIVES
})
class LinkWithQueryParamsAndFragment {}

@Component({
  selector: 'simple-cmp',
  template: `simple`,
  directives: ROUTER_DIRECTIVES
})
class SimpleCmp {
}

@Component({
  selector: 'team-cmp',
  template: `team {{id | async}} { <router-outlet></router-outlet>, right: <router-outlet name="right"></router-outlet> }`,
  directives: ROUTER_DIRECTIVES
})
class TeamCmp {
  id: Observable<string>;
  recordedParams: Params[] = [];

  constructor(public route: ActivatedRoute) {
    this.id = route.params.map(p => p['id']);
    route.params.forEach(_ => this.recordedParams.push(_));
  }
}

@Component({
  selector: 'user-cmp',
  template: `user {{name | async}}`,
  directives: [ROUTER_DIRECTIVES]
})
class UserCmp {
  name: Observable<string>;
  recordedParams: Params[] = [];

  constructor(route: ActivatedRoute) {
    this.name = route.params.map(p => p['name']);
    route.params.forEach(_ => this.recordedParams.push(_));
  }
}

@Component({
  selector: 'query-cmp',
  template: `query: {{name | async}} fragment: {{fragment | async}}`,
  directives: [ROUTER_DIRECTIVES]
})
class QueryParamsAndFragmentCmp {
  name: Observable<string>;
  fragment: Observable<string>;

  constructor(router: Router) {
    this.name = router.routerState.queryParams.map(p => p['name']);
    this.fragment = router.routerState.fragment;
  }
}

@Component({
  selector: 'root-cmp',
  template: `<router-outlet></router-outlet>`,
  directives: [ROUTER_DIRECTIVES]
})
class RootCmp {}

function advance(fixture: ComponentFixture<any>): void {
  tick();
  fixture.detectChanges();
}