import { Test, TestingModule } from '@nestjs/testing';
import { getRepositoryToken } from '@nestjs/typeorm';
import { SettingsController } from './settings.controller';
import { DocumentType } from '../database/entities/document-type.entity';
import { Postprocessing } from '../database/entities/postprocessing.entity';
import { PostprocessingAction } from '../database/entities/postprocessing-action.entity';
import { UserClient } from '../database/entities/user-client.entity';
import { Client } from '../database/entities/client.entity';
import { Setting } from '../database/entities/setting.entity';
import { PostprocessingLog } from '../database/entities/postprocessing-log.entity';
import { ExportTarget } from '../database/entities/export-target.entity';
import { ClientIdentifier } from '../database/entities/client-identifier.entity';
import { DocumentField } from '../database/entities/document-field.entity';
import { CorrespondentSetting } from '../database/entities/correspondent-setting.entity';
import { InboxPostprocessingAction } from '../database/entities/inbox-postprocessing-action.entity';
import { PaperlessService } from '../paperless/paperless.service';
import { ExportService } from '../postprocessing/export.service';

const makeRepo = (data: any[] = []) => ({
  find: jest.fn().mockResolvedValue(data),
  findOneByOrFail: jest.fn().mockResolvedValue(data[0] ?? {}),
  create: jest.fn().mockImplementation((d) => d),
  save: jest.fn().mockImplementation((d) => Promise.resolve({ Id: 99, ...d })),
  update: jest.fn().mockResolvedValue({ affected: 1 }),
  delete: jest.fn().mockResolvedValue({ affected: 1 }),
});

describe('SettingsController', () => {
  let controller: SettingsController;
  let docTypeRepo: ReturnType<typeof makeRepo>;
  let ppRepo: ReturnType<typeof makeRepo>;
  let ppActionRepo: ReturnType<typeof makeRepo>;
  let userClientRepo: ReturnType<typeof makeRepo>;
  let paperlessService: { getDocumentTypes: jest.Mock };

  beforeEach(async () => {
    paperlessService = { getDocumentTypes: jest.fn().mockResolvedValue([]) };
    docTypeRepo = makeRepo([{ Id: 1, DocumentTypeId: 10, TitelTemplate: 'T' }]);
    ppRepo = makeRepo([{ Id: 1, Name: 'Rule1', Order: 1, IsActive: true }]);
    ppActionRepo = makeRepo([]);
    userClientRepo = makeRepo([{ Id: 1, UserId: 'u1', ClientId: 2 }]);

    const module: TestingModule = await Test.createTestingModule({
      controllers: [SettingsController],
      providers: [
        { provide: getRepositoryToken(DocumentType), useValue: docTypeRepo },
        { provide: getRepositoryToken(Postprocessing), useValue: ppRepo },
        {
          provide: getRepositoryToken(PostprocessingAction),
          useValue: ppActionRepo,
        },
        { provide: getRepositoryToken(UserClient), useValue: userClientRepo },
        { provide: getRepositoryToken(Client), useValue: makeRepo() },
        {
          provide: getRepositoryToken(Setting),
          useValue: makeRepo([{ ID: 1, Typ: 1, Wert: 'v' }]),
        },
        {
          provide: getRepositoryToken(PostprocessingLog),
          useValue: makeRepo(),
        },
        { provide: getRepositoryToken(ExportTarget), useValue: makeRepo() },
        { provide: getRepositoryToken(ClientIdentifier), useValue: makeRepo() },
        { provide: getRepositoryToken(DocumentField), useValue: makeRepo() },
        {
          provide: getRepositoryToken(CorrespondentSetting),
          useValue: makeRepo(),
        },
        {
          provide: getRepositoryToken(InboxPostprocessingAction),
          useValue: makeRepo(),
        },
        { provide: PaperlessService, useValue: paperlessService },
        { provide: ExportService, useValue: { testConnection: jest.fn() } },
      ],
    }).compile();

    controller = module.get<SettingsController>(SettingsController);
  });

  it('should be defined', () => {
    expect(controller).toBeDefined();
  });

  // Document Types
  it('getDocumentTypes returns list', async () => {
    const result = await controller.getDocumentTypes();
    expect(result).toHaveLength(1);
    expect(docTypeRepo.find).toHaveBeenCalledWith({ order: { Id: 'ASC' } });
  });

  it('getDocumentTypes legt in Paperless neu angelegte Typen an', async () => {
    paperlessService.getDocumentTypes.mockResolvedValue([
      { id: 10, name: 'Bekannt' },
      { id: 11, name: 'Neu' },
    ]);

    await controller.getDocumentTypes();

    expect(docTypeRepo.create).toHaveBeenCalledTimes(1);
    expect(docTypeRepo.create).toHaveBeenCalledWith(
      expect.objectContaining({ DocumentTypeId: 11 }),
    );
    expect(docTypeRepo.save).toHaveBeenCalled();
  });

  it('getDocumentTypes liefert die Liste auch bei Paperless-Ausfall', async () => {
    paperlessService.getDocumentTypes.mockRejectedValue(new Error('down'));

    const result = await controller.getDocumentTypes();

    expect(result).toHaveLength(1);
    expect(docTypeRepo.create).not.toHaveBeenCalled();
  });

  it('updateDocumentType calls update + findOneByOrFail', async () => {
    await controller.updateDocumentType('1', { TitelTemplate: 'New' });
    expect(docTypeRepo.update).toHaveBeenCalledWith(1, {
      TitelTemplate: 'New',
    });
    expect(docTypeRepo.findOneByOrFail).toHaveBeenCalledWith({ Id: 1 });
  });

  // Postprocessing
  it('getPostprocessingRules returns ordered list', async () => {
    const result = await controller.getPostprocessingRules();
    expect(result).toHaveLength(1);
    expect(ppRepo.find).toHaveBeenCalledWith({ order: { Order: 'ASC' } });
  });

  it('createPostprocessingRule creates and saves', async () => {
    const result = await controller.createPostprocessingRule({
      Name: 'New',
    } as any);
    expect(ppRepo.create).toHaveBeenCalledWith({ Name: 'New' });
    expect(ppRepo.save).toHaveBeenCalled();
    expect(result).toHaveProperty('Id', 99);
  });

  it('deletePostprocessingRule deletes', async () => {
    const result = await controller.deletePostprocessingRule('5');
    expect(ppRepo.delete).toHaveBeenCalledWith(5);
    expect(result).toEqual({ deleted: true });
  });

  // User Clients
  it('getUserClients returns list', async () => {
    const result = await controller.getUserClients();
    expect(result).toHaveLength(1);
  });

  it('createUserClient creates', async () => {
    const result = await controller.createUserClient({
      UserId: 'u2',
      ClientId: 3,
    } as any);
    expect(userClientRepo.create).toHaveBeenCalled();
    expect(result).toHaveProperty('Id', 99);
  });

  it('deleteUserClient deletes', async () => {
    const result = await controller.deleteUserClient('1');
    expect(userClientRepo.delete).toHaveBeenCalledWith(1);
    expect(result).toEqual({ deleted: true });
  });
});