import { describe, it, expect, vi, beforeEach } from 'vitest';

const { mockFind, mockFindOne, mockFindOneAndUpdate, mockSave } = vi.hoisted(() => ({
  mockFind: vi.fn(),
  mockFindOne: vi.fn(),
  mockFindOneAndUpdate: vi.fn(),
  mockSave: vi.fn(),
}));

vi.mock('../../schemas/organizer-fill.schema.js', () => {
  const chain = () => ({
    sort: vi.fn().mockReturnThis(),
    limit: vi.fn().mockReturnThis(),
    lean: vi.fn().mockReturnThis(),
    exec: mockFind,
  });

  const findOneChain = () => ({
    lean: vi.fn().mockReturnThis(),
    exec: mockFindOne,
  });

  const updateChain = () => ({
    exec: mockFindOneAndUpdate,
  });

  class FakeModel {
    data: unknown;
    constructor(data: unknown) {
      this.data = data;
    }
    save = mockSave;
    toObject() {
      return this.data;
    }
    static find = vi.fn(() => chain());
    static findOne = vi.fn(() => findOneChain());
    static findOneAndUpdate = vi.fn(() => updateChain());
  }

  return { OrganizerFillModel: FakeModel };
});

import { OrganizerRepository } from './organizer.repository.js';

describe(OrganizerRepository.name, () => {
  let repo: OrganizerRepository;

  beforeEach(() => {
    vi.clearAllMocks();
    repo = new OrganizerRepository();
  });

  describe('findByHousehold', () => {
    it('returns paginated items', async () => {
      const items = [{ _id: 'fill-1', regimenName: 'Morning' }];
      mockFind.mockResolvedValue(items);

      const result = await repo.findByHousehold('hh1', 'user-1', { limit: 20 });

      expect(result.data).toEqual(items);
      expect(result.pagination.hasMore).toBe(false);
    });

    it('handles cursor-based pagination', async () => {
      const items = [{ _id: 'fill-2', regimenName: 'Evening' }];
      mockFind.mockResolvedValue(items);

      const cursor = Buffer.from('fill-1').toString('base64');
      const result = await repo.findByHousehold('hh1', 'user-1', { cursor, limit: 20 });

      expect(result.data).toEqual(items);
      expect(result.pagination.hasMore).toBe(false);
    });

    it('sets hasMore when more items exist', async () => {
      const items = Array.from({ length: 3 }, (_, i) => ({ _id: `fill-${i}`, regimenName: `R${i}` }));
      mockFind.mockResolvedValue(items);

      const result = await repo.findByHousehold('hh1', 'user-1', { limit: 2 });

      expect(result.data).toHaveLength(2);
      expect(result.pagination.hasMore).toBe(true);
      expect(result.pagination.cursor).toBeTruthy();
    });

    it('returns null cursor when no data', async () => {
      mockFind.mockResolvedValue([]);

      const result = await repo.findByHousehold('hh1', 'user-1', { limit: 20 });

      expect(result.pagination.cursor).toBeNull();
      expect(result.pagination.hasMore).toBe(false);
    });

    it('filters by regimenId', async () => {
      mockFind.mockResolvedValue([]);

      await repo.findByHousehold('hh1', 'user-1', { regimenId: 'reg-1', limit: 20 });

      expect(mockFind).toHaveBeenCalled();
    });

    it('filters by status', async () => {
      mockFind.mockResolvedValue([]);

      await repo.findByHousehold('hh1', 'user-1', { status: 'completed' as never, limit: 20 });

      expect(mockFind).toHaveBeenCalled();
    });

    it('returns cursor as null when hasMore is false even with data', async () => {
      const items = [{ _id: 'fill-1', regimenName: 'Morning' }];
      mockFind.mockResolvedValue(items);

      const result = await repo.findByHousehold('hh1', 'user-1', { limit: 20 });

      expect(result.pagination.cursor).toBeNull();
      expect(result.pagination.hasMore).toBe(false);
    });
  });

  describe('findById', () => {
    it('returns fill by id and householdId', async () => {
      const fill = { _id: 'fill-1', householdId: 'hh1', regimenName: 'Morning' };
      mockFindOne.mockResolvedValue(fill);

      const result = await repo.findById('fill-1', 'hh1');

      expect(result).toEqual(fill);
    });

    it('returns null when not found', async () => {
      mockFindOne.mockResolvedValue(null);

      const result = await repo.findById('fill-missing', 'hh1');

      expect(result).toBeNull();
    });
  });

  describe('create', () => {
    it('creates and returns organizer fill', async () => {
      const data = {
        householdId: 'hh1',
        userId: 'user-1',
        regimenId: 'reg-1',
        regimenName: 'Morning',
        numberOfDays: 7,
        fillDate: new Date(),
        items: [],
        status: 'completed' as const,
      };
      mockSave.mockImplementation(function (this: { toObject: () => unknown }) {
        return Promise.resolve(this);
      });

      const result = await repo.create(data as never);

      expect(result).toBeTruthy();
      expect(mockSave).toHaveBeenCalled();
    });
  });

  describe('updateStatus', () => {
    it('updates and returns fill with new status', async () => {
      const updated = { _id: 'fill-1', status: 'reversed' };
      mockFindOneAndUpdate.mockResolvedValue(updated);

      const result = await repo.updateStatus('fill-1', 'hh1', 'reversed' as never);

      expect(result).toEqual(updated);
    });

    it('returns null when fill not found', async () => {
      mockFindOneAndUpdate.mockResolvedValue(null);

      const result = await repo.updateStatus('fill-missing', 'hh1', 'reversed' as never);

      expect(result).toBeNull();
    });
  });
});