const Joi = require('joi');

const createGroupSchema = Joi.object({
  name: Joi.string().trim().min(1).max(100).required().messages({
    'string.empty': 'Group name is required',
    'string.min': 'Group name must be at least 1 character',
    'string.max': 'Group name must not exceed 100 characters',
  }),
  members: Joi.array().items(Joi.number().integer().positive()).min(1).required().messages({
    'array.min': 'At least one member is required',
    'array.base': 'Members must be an array',
  }),
});

const updateGroupSchema = Joi.object({
  name: Joi.string().trim().min(1).max(100).optional(),
});

const addMembersSchema = Joi.object({
  userIds: Joi.array().items(Joi.number().integer().positive()).min(1).required().messages({
    'array.min': 'At least one user ID is required',
  }),
});

module.exports = {
  createGroupSchema,
  updateGroupSchema,
  addMembersSchema,
};