/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */

import {Component, Injectable, NgModule} from '@angular/core';
import {ComponentFixture, fakeAsync, TestBed, tick} from '@angular/core/testing';
import {By} from '@angular/platform-browser';
import {provideRoutes, Router, RouterModule, ROUTES} from '@angular/router';

@Component({template: '<div>simple standalone</div>', standalone: true})
export class SimpleStandaloneComponent {}

@Component({template: '<div>not standalone</div>', standalone: false})
export class NotStandaloneComponent {}

@Component({
  template: '<router-outlet></router-outlet>',
  standalone: true,
  imports: [RouterModule],
})
export class RootCmp {}

describe('standalone in Router API', () => {
  describe('loadChildren => routes', () => {
    it('can navigate to and render standalone component', fakeAsync(() => {
      TestBed.configureTestingModule({
        imports: [
          RouterModule.forRoot([
            {
              path: 'lazy',
              component: RootCmp,
              loadChildren: () => [{path: '', component: SimpleStandaloneComponent}],
            },
          ]),
        ],
      });

      const root = TestBed.createComponent(RootCmp);

      const router = TestBed.inject(Router);
      router.navigateByUrl('/lazy');
      advance(root);
      expect(root.nativeElement.innerHTML).toContain('simple standalone');
    }));

    it('throws an error when loadChildren=>routes has a component that is not standalone', fakeAsync(() => {
      TestBed.configureTestingModule({
        imports: [
          RouterModule.forRoot([
            {
              path: 'lazy',
              component: RootCmp,
              loadChildren: () => [{path: 'notstandalone', component: NotStandaloneComponent}],
            },
          ]),
        ],
      });

      const root = TestBed.createComponent(RootCmp);

      const router = TestBed.inject(Router);
      router.navigateByUrl('/lazy/notstandalone');
      expect(() => advance(root)).toThrowError(
        /.*lazy\/notstandalone.*component must be standalone/,
      );
    }));
  });
  describe('route providers', () => {
    it('can provide a guard on a route', fakeAsync(() => {
      @Injectable()
      class ConfigurableGuard {
        static canActivateValue = false;
        canActivate() {
          return ConfigurableGuard.canActivateValue;
        }
      }

      TestBed.configureTestingModule({
        imports: [
          RouterModule.forRoot([
            {
              path: 'simple',
              providers: [ConfigurableGuard],
              canActivate: [ConfigurableGuard],
              component: SimpleStandaloneComponent,
            },
          ]),
        ],
      });
      const root = TestBed.createComponent(RootCmp);

      ConfigurableGuard.canActivateValue = false;
      const router = TestBed.inject(Router);
      router.navigateByUrl('/simple');
      advance(root);
      expect(root.nativeElement.innerHTML).not.toContain('simple standalone');
      expect(router.url).not.toContain('simple');

      ConfigurableGuard.canActivateValue = true;
      router.navigateByUrl('/simple');
      advance(root);
      expect(root.nativeElement.innerHTML).toContain('simple standalone');
      expect(router.url).toContain('simple');
    }));

    it('can inject provider on a route into component', fakeAsync(() => {
      @Injectable()
      class Service {
        value = 'my service';
      }

      @Component({template: `{{service.value}}`})
      class MyComponent {
        constructor(readonly service: Service) {}
      }

      TestBed.configureTestingModule({
        imports: [
          RouterModule.forRoot([{path: 'home', providers: [Service], component: MyComponent}]),
        ],
        declarations: [MyComponent],
      });
      const root = TestBed.createComponent(RootCmp);

      const router = TestBed.inject(Router);
      router.navigateByUrl('/home');
      advance(root);
      expect(root.nativeElement.innerHTML).toContain('my service');
      expect(router.url).toContain('home');
    }));

    it('can not inject provider in lazy loaded ngModule from component on same level', fakeAsync(() => {
      @Injectable()
      class Service {
        value = 'my service';
      }

      @NgModule({providers: [Service]})
      class LazyModule {}

      @Component({template: `{{service.value}}`})
      class MyComponent {
        constructor(readonly service: Service) {}
      }

      TestBed.configureTestingModule({
        imports: [
          RouterModule.forRoot([
            {path: 'home', loadChildren: () => LazyModule, component: MyComponent},
          ]),
        ],
        declarations: [MyComponent],
      });
      const root = TestBed.createComponent(RootCmp);

      const router = TestBed.inject(Router);
      router.navigateByUrl('/home');
      expect(() => advance(root)).toThrowError();
    }));

    it('component from lazy module can inject provider from parent route', fakeAsync(() => {
      @Injectable()
      class Service {
        value = 'my service';
      }

      @Component({template: `{{service.value}}`})
      class MyComponent {
        constructor(readonly service: Service) {}
      }
      @NgModule({
        providers: [Service],
        declarations: [MyComponent],
        imports: [RouterModule.forChild([{path: '', component: MyComponent}])],
      })
      class LazyModule {}

      TestBed.configureTestingModule({
        imports: [RouterModule.forRoot([{path: 'home', loadChildren: () => LazyModule}])],
      });
      const root = TestBed.createComponent(RootCmp);

      const router = TestBed.inject(Router);
      router.navigateByUrl('/home');
      advance(root);
      expect(root.nativeElement.innerHTML).toContain('my service');
    }));

    it('gets the correct injector for guards and components when combining lazy modules and route providers', fakeAsync(() => {
      const canActivateLog: string[] = [];
      abstract class ServiceBase {
        abstract name: string;
        canActivate() {
          canActivateLog.push(this.name);
          return true;
        }
      }

      @Injectable()
      class Service1 extends ServiceBase {
        override name = 'service1';
      }

      @Injectable()
      class Service2 extends ServiceBase {
        override name = 'service2';
      }

      @Injectable()
      class Service3 extends ServiceBase {
        override name = 'service3';
      }

      @Component({template: `parent<router-outlet></router-outlet>`})
      class ParentCmp {
        constructor(readonly service: ServiceBase) {}
      }
      @Component({template: `child`})
      class ChildCmp {
        constructor(readonly service: ServiceBase) {}
      }

      @Component({template: `child2`})
      class ChildCmp2 {
        constructor(readonly service: ServiceBase) {}
      }
      @NgModule({
        providers: [{provide: ServiceBase, useClass: Service2}],
        declarations: [ChildCmp, ChildCmp2],
        imports: [
          RouterModule.forChild([
            {
              path: '',
              // This component and guard should get Service2 since it's provided in this module
              component: ChildCmp,
              canActivate: [ServiceBase],
            },
            {
              path: 'child2',
              providers: [{provide: ServiceBase, useFactory: () => new Service3()}],
              // This component and guard should get Service3 since it's provided on this route
              component: ChildCmp2,
              canActivate: [ServiceBase],
            },
          ]),
        ],
      })
      class LazyModule {}

      TestBed.configureTestingModule({
        imports: [
          RouterModule.forRoot([
            {
              path: 'home',
              // This component and guard should get Service1 since it's provided on this route
              component: ParentCmp,
              canActivate: [ServiceBase],
              providers: [{provide: ServiceBase, useFactory: () => new Service1()}],
              loadChildren: () => LazyModule,
            },
          ]),
        ],
        declarations: [ParentCmp],
      });
      const root = TestBed.createComponent(RootCmp);

      const router = TestBed.inject(Router);
      router.navigateByUrl('/home');
      advance(root);
      expect(canActivateLog).toEqual(['service1', 'service2']);
      expect(
        root.debugElement.query(By.directive(ParentCmp)).componentInstance.service.name,
      ).toEqual('service1');
      expect(
        root.debugElement.query(By.directive(ChildCmp)).componentInstance.service.name,
      ).toEqual('service2');

      router.navigateByUrl('/home/child2');
      advance(root);
      expect(canActivateLog).toEqual(['service1', 'service2', 'service3']);
      expect(
        root.debugElement.query(By.directive(ChildCmp2)).componentInstance.service.name,
      ).toEqual('service3');
    }));
  });

  describe('loadComponent', () => {
    it('does not load component when canActivate returns false', fakeAsync(() => {
      const loadComponentSpy = jasmine.createSpy();
      @Injectable({providedIn: 'root'})
      class Guard {
        canActivate() {
          return false;
        }
      }

      TestBed.configureTestingModule({
        imports: [
          RouterModule.forRoot([
            {
              path: 'home',
              loadComponent: loadComponentSpy,
              canActivate: [Guard],
            },
          ]),
        ],
      });

      TestBed.inject(Router).navigateByUrl('/home');
      tick();
      expect(loadComponentSpy).not.toHaveBeenCalled();
    }));

    it('loads and renders lazy component', fakeAsync(() => {
      TestBed.configureTestingModule({
        imports: [
          RouterModule.forRoot([
            {
              path: 'home',
              loadComponent: () => SimpleStandaloneComponent,
            },
          ]),
        ],
      });

      const root = TestBed.createComponent(RootCmp);
      TestBed.inject(Router).navigateByUrl('/home');
      advance(root);
      expect(root.nativeElement.innerHTML).toContain('simple standalone');
    }));

    it('throws error when loadComponent is not standalone', fakeAsync(() => {
      TestBed.configureTestingModule({
        imports: [
          RouterModule.forRoot([
            {
              path: 'home',
              loadComponent: () => NotStandaloneComponent,
            },
          ]),
        ],
      });

      const root = TestBed.createComponent(RootCmp);
      TestBed.inject(Router).navigateByUrl('/home');
      expect(() => advance(root)).toThrowError(/.*home.*component must be standalone/);
    }));

    it('throws error when loadComponent is used with a module', fakeAsync(() => {
      @NgModule()
      class LazyModule {}

      TestBed.configureTestingModule({
        imports: [
          RouterModule.forRoot([
            {
              path: 'home',
              loadComponent: () => LazyModule,
            },
          ]),
        ],
      });

      const root = TestBed.createComponent(RootCmp);
      TestBed.inject(Router).navigateByUrl('/home');
      expect(() => advance(root)).toThrowError(/.*home.*Use 'loadChildren' instead/);
    }));
  });
  describe('default export unwrapping', () => {
    it('should work for loadComponent', async () => {
      TestBed.configureTestingModule({
        imports: [
          RouterModule.forRoot([
            {
              path: 'home',
              loadComponent: () => import('./default_export_component'),
            },
          ]),
        ],
      });

      const root = TestBed.createComponent(RootCmp);
      await TestBed.inject(Router).navigateByUrl('/home');
      root.detectChanges();

      expect(root.nativeElement.innerHTML).toContain('default exported');
    });

    it('should work for loadChildren', async () => {
      TestBed.configureTestingModule({
        imports: [
          RouterModule.forRoot([
            {
              path: 'home',
              loadChildren: () => import('./default_export_routes'),
            },
          ]),
        ],
      });

      const root = TestBed.createComponent(RootCmp);
      await TestBed.inject(Router).navigateByUrl('/home');
      root.detectChanges();

      expect(root.nativeElement.innerHTML).toContain('default exported');
    });
  });
});

describe('provideRoutes', () => {
  it('warns if provideRoutes is used without provideRouter, RouterModule, or RouterModule.forRoot', () => {
    spyOn(console, 'warn');
    TestBed.configureTestingModule({providers: [provideRoutes([])]});
    TestBed.inject(ROUTES);
    expect(console.warn).toHaveBeenCalled();
  });
});

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