import { Component } from '@angular/core';
import { TestBed } from '@angular/core/testing';
import { Router, provideRouter } from '@angular/router';
import { of, throwError } from 'rxjs';
import { Mock, vi } from 'vitest';
import { UserList } from '../lists/lists.models';
import { ListsService } from '../lists/lists.service';
import { TemplatesService } from '../templates/templates.service';
import { AssistantChatComponent } from './assistant-chat.component';
import { AssistantService } from './assistant.service';

@Component({
  standalone: true,
  template: '',
})
class EmptyRouteComponent {}

describe('AssistantChatComponent', () => {
  let assistantService: { chat: Mock };
  let listsService: { getList: Mock };
  let templatesService: { getTemplate: Mock };
  let router: Router;

  beforeEach(async () => {
    assistantService = {
      chat: vi.fn().mockReturnValue(
        of({
          message: { role: 'assistant', content: 'ok' },
          actions: [],
        }),
      ),
    };
    listsService = {
      getList: vi.fn(),
    };
    templatesService = {
      getTemplate: vi.fn(),
    };

    await TestBed.configureTestingModule({
      imports: [AssistantChatComponent],
      providers: [
        provideRouter([
          { path: 'lists', component: EmptyRouteComponent },
          { path: 'lists/:listId', component: EmptyRouteComponent },
          { path: 'templates', component: EmptyRouteComponent },
          { path: 'templates/:templateId', component: EmptyRouteComponent },
        ]),
        { provide: AssistantService, useValue: assistantService },
        { provide: ListsService, useValue: listsService },
        { provide: TemplatesService, useValue: templatesService },
      ],
    }).compileComponents();

    router = TestBed.inject(Router);
  });

  it('sends list detail context with the current list', async () => {
    const list = createList();
    listsService.getList.mockReturnValue(of(list));
    await router.navigateByUrl('/lists/list-1');
    const fixture = TestBed.createComponent(AssistantChatComponent);
    const component = fixture.componentInstance as unknown as {
      draft: { set(value: string): void };
      send(): void;
    };

    component.draft.set('Was ist hier offen?');
    component.send();

    expect(listsService.getList).toHaveBeenCalledOnce();
    expect(listsService.getList).toHaveBeenCalledWith('list-1');
    expect(assistantService.chat).toHaveBeenCalledWith({
      messages: [
        {
          role: 'assistant',
          content:
            'Hallo, ich bin dein Listify-Assistent. Was soll ich vorbereiten?',
        },
        { role: 'user', content: 'Was ist hier offen?' },
      ],
      context: {
        page: 'list_detail',
        route: '/lists/list-1',
        list,
      },
    });
  });

  it('falls back to route context when list context loading fails', async () => {
    listsService.getList.mockReturnValue(
      throwError(() => new Error('not found')),
    );
    await router.navigateByUrl('/lists/list-1');
    const fixture = TestBed.createComponent(AssistantChatComponent);
    const component = fixture.componentInstance as unknown as {
      draft: { set(value: string): void };
      send(): void;
    };

    component.draft.set('Was ist hier offen?');
    component.send();

    expect(assistantService.chat).toHaveBeenCalledWith(
      expect.objectContaining({
        context: {
          page: 'unknown',
          route: '/lists/list-1',
        },
      }),
    );
  });

  it('sends overview context without loading a list', async () => {
    await router.navigateByUrl('/lists');
    const fixture = TestBed.createComponent(AssistantChatComponent);
    const component = fixture.componentInstance as unknown as {
      draft: { set(value: string): void };
      send(): void;
    };

    component.draft.set('Welche Listen habe ich?');
    component.send();

    expect(listsService.getList).not.toHaveBeenCalled();
    expect(assistantService.chat).toHaveBeenCalledWith(
      expect.objectContaining({
        context: {
          page: 'lists_overview',
          route: '/lists',
        },
      }),
    );
  });
});

function createList(): UserList {
  return {
    id: 'list-1',
    ownerId: 'user-1',
    accessRole: 'owner',
    name: 'Einkauf',
    kind: 'shopping',
    items: [],
    collaborators: [],
    createdAt: '2026-06-12T00:00:00.000Z',
    updatedAt: '2026-06-12T00:00:00.000Z',
  };
}