import '@angular/compiler';
import { Injector, runInInjectionContext } from '@angular/core';
import {
  beforeEach,
  describe,
  expect,
  it,
  vi
} from 'vitest';
import { Router } from '@angular/router';
import { Store } from '@ngrx/store';
import { of } from 'rxjs';

import { ServerDirectoryFacade } from '../../../server-directory';
import { SignalServerAuthService } from './signal-server-auth.service';
import { SignalServerAuthorizeService } from './signal-server-authorize.service';

const HOME_URL = 'https://signal.toju.app';
const FOREIGN_URL = 'https://signal-sweden.toju.app';
const homeUser = {
  id: 'user-1',
  username: 'alice',
  displayName: 'Alice',
  homeSignalServerUrl: HOME_URL
};

describe('SignalServerAuthorizeService', () => {
  let router: { navigate: ReturnType<typeof vi.fn>; url: string };
  let store: { select: ReturnType<typeof vi.fn> };
  let serverDirectory: {
    ensureServerEndpoint: ReturnType<typeof vi.fn>;
    findServerByUrl: ReturnType<typeof vi.fn>;
    servers: ReturnType<typeof vi.fn>;
    testServer: ReturnType<typeof vi.fn>;
  };
  let signalServerAuth: {
    ensureProvisioned: ReturnType<typeof vi.fn>;
    hasValidCredential: ReturnType<typeof vi.fn>;
    migrateHomeCredential: ReturnType<typeof vi.fn>;
  };
  let service: SignalServerAuthorizeService;

  beforeEach(() => {
    router = { navigate: vi.fn(() => Promise.resolve(true)), url: '/room/room-1' };
    store = { select: vi.fn(() => of(homeUser)) };
    serverDirectory = {
      ensureServerEndpoint: vi.fn(() => ({ id: 'endpoint-1' })),
      findServerByUrl: vi.fn(() => ({ id: 'endpoint-1', status: 'online' })),
      servers: vi.fn(() => []),
      testServer: vi.fn(() => Promise.resolve())
    };

    signalServerAuth = {
      ensureProvisioned: vi.fn(() => Promise.resolve({ kind: 'skipped', reason: 'no-home-user' })),
      hasValidCredential: vi.fn(() => false),
      migrateHomeCredential: vi.fn()
    };

    const injector = Injector.create({
      providers: [
        SignalServerAuthorizeService,
        { provide: Router, useValue: router },
        { provide: Store, useValue: store },
        { provide: ServerDirectoryFacade, useValue: serverDirectory },
        { provide: SignalServerAuthService, useValue: signalServerAuth }
      ]
    });

    service = runInInjectionContext(injector, () => injector.get(SignalServerAuthorizeService));
  });

  it('returns true immediately when a valid credential already exists', async () => {
    signalServerAuth.hasValidCredential.mockReturnValue(true);

    await expect(service.ensureCredentialForServerUrl(FOREIGN_URL)).resolves.toBe(true);
    expect(signalServerAuth.ensureProvisioned).not.toHaveBeenCalled();
  });

  it('never provisions or opens the authorize login page for the home signal server', async () => {
    await expect(service.ensureCredentialForServerUrl(HOME_URL)).resolves.toBe(false);

    expect(signalServerAuth.ensureProvisioned).not.toHaveBeenCalled();
    expect(router.navigate).not.toHaveBeenCalled();
  });

  it('restores the home credential from the legacy token store instead of provisioning', async () => {
    signalServerAuth.hasValidCredential
      .mockReturnValueOnce(false)
      .mockReturnValue(true);

    await expect(service.ensureCredentialForServerUrl(HOME_URL)).resolves.toBe(true);

    expect(signalServerAuth.migrateHomeCredential).toHaveBeenCalledWith(homeUser);
    expect(signalServerAuth.ensureProvisioned).not.toHaveBeenCalled();
    expect(router.navigate).not.toHaveBeenCalled();
  });

  it('treats scheme variants of the home url as the home server', async () => {
    await expect(service.ensureCredentialForServerUrl('wss://signal.toju.app/')).resolves.toBe(false);

    expect(signalServerAuth.ensureProvisioned).not.toHaveBeenCalled();
    expect(router.navigate).not.toHaveBeenCalled();
  });

  it('keeps the home session active when automatic foreign provisioning cannot recover', async () => {
    await expect(service.ensureCredentialForServerUrl(FOREIGN_URL)).resolves.toBe(false);

    expect(signalServerAuth.ensureProvisioned).toHaveBeenCalledWith(FOREIGN_URL, homeUser);
    expect(router.navigate).not.toHaveBeenCalled();
  });

  it('returns true when foreign provisioning succeeds', async () => {
    signalServerAuth.ensureProvisioned.mockResolvedValue({ kind: 'provisioned', result: {} });

    await expect(service.ensureCredentialForServerUrl(FOREIGN_URL)).resolves.toBe(true);
    expect(router.navigate).not.toHaveBeenCalled();
  });
});