import { describe, it, expect, vi, beforeEach } from 'vitest';
import { ProjectService } from '../src/services/project.service.js';
import { NotFoundError, ConflictError } from '../src/services/mcp-server.service.js';
import type { IProjectRepository } from '../src/repositories/project.repository.js';
import type { IMcpServerRepository } from '../src/repositories/interfaces.js';

function mockProjectRepo(): IProjectRepository {
  return {
    findAll: vi.fn(async () => []),
    findById: vi.fn(async () => null),
    findByName: vi.fn(async () => null),
    create: vi.fn(async (data) => ({
      id: 'proj-1',
      name: data.name,
      description: data.description ?? '',
      ownerId: data.ownerId,
      version: 1,
      createdAt: new Date(),
      updatedAt: new Date(),
    })),
    update: vi.fn(async (id) => ({
      id, name: 'test', description: '', ownerId: 'u1', version: 2,
      createdAt: new Date(), updatedAt: new Date(),
    })),
    delete: vi.fn(async () => {}),
  };
}

function mockServerRepo(): IMcpServerRepository {
  return {
    findAll: vi.fn(async () => []),
    findById: vi.fn(async () => null),
    findByName: vi.fn(async () => null),
    create: vi.fn(async () => ({} as never)),
    update: vi.fn(async () => ({} as never)),
    delete: vi.fn(async () => {}),
  };
}

describe('ProjectService', () => {
  let projectRepo: ReturnType<typeof mockProjectRepo>;
  let serverRepo: ReturnType<typeof mockServerRepo>;
  let service: ProjectService;

  beforeEach(() => {
    projectRepo = mockProjectRepo();
    serverRepo = mockServerRepo();
    service = new ProjectService(projectRepo, serverRepo);
  });

  describe('create', () => {
    it('creates a project', async () => {
      const result = await service.create({ name: 'my-project' }, 'user-1');
      expect(result.name).toBe('my-project');
      expect(result.ownerId).toBe('user-1');
    });

    it('throws ConflictError when name exists', async () => {
      vi.mocked(projectRepo.findByName).mockResolvedValue({ id: '1' } as never);
      await expect(service.create({ name: 'taken' }, 'u1')).rejects.toThrow(ConflictError);
    });

    it('validates input', async () => {
      await expect(service.create({ name: '' }, 'u1')).rejects.toThrow();
    });
  });

  describe('getById', () => {
    it('throws NotFoundError when not found', async () => {
      await expect(service.getById('missing')).rejects.toThrow(NotFoundError);
    });
  });

  describe('delete', () => {
    it('deletes project', async () => {
      vi.mocked(projectRepo.findById).mockResolvedValue({ id: 'p1' } as never);
      await service.delete('p1');
      expect(projectRepo.delete).toHaveBeenCalledWith('p1');
    });
  });
});