const { ValidationError } = require('../shared/errors');

class UsersService {
  constructor({ usersRepository }) {
    this.usersRepository = usersRepository;
  }

  async getAllUsers() {
    return await this.usersRepository.findAll();
  }

  async getUserById(id) {
    return await this.usersRepository.findById(id);
  }

  async updateUserProfile(id, updateData) {
    const { name, email, avatarUrl } = updateData;

    if (name && name.trim() === '') {
      throw new ValidationError('Name cannot be empty');
    }

    if (email && email.trim() === '') {
      throw new ValidationError('Email cannot be empty');
    }

    const dataToUpdate = {};
    if (name !== undefined) dataToUpdate.name = name;
    if (email !== undefined) dataToUpdate.email = email;
    if (avatarUrl !== undefined) dataToUpdate.avatarUrl = avatarUrl;

    return await this.usersRepository.update(id, dataToUpdate);
  }
}

module.exports = UsersService;