using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Web;
using EnVisage.Code;

namespace EnVisage.Models
{
    public class RoleModel : IBaseModel<AspNetRole>
    {
        public Guid Id { get; set; }
        [Required]
        public string Name { get; set; }
        public int AspNetUsersCount { get; set; }

        /// <summary>
        /// Casts a <see cref="AspNetRole"/> obect to the object of type <see cref="RoleModel"/>.
        /// </summary>
        /// <param name="obj">A <see cref="AspNetRole"/> object.</param>
        /// <returns>A <see cref="RoleModel"/> object filled with data from db.</returns>
        public static explicit operator RoleModel(AspNetRole obj)
        {
            if (obj == null)
                return null;
            var model = new RoleModel
            {
                Id = Guid.Parse(obj.Id),
                Name = obj.Name,
                AspNetUsersCount = obj.AspNetUsers.Count
            };
            model.TrimStringProperties();
            return model;
        }

        /// <summary>
        /// Copies data from model to DAL object.
        /// </summary>
        /// <param name="dbObj">A target DAL object.</param>
        public void CopyTo(AspNetRole dbObj)
        {
            if (dbObj == null)
                throw new ArgumentNullException();
            if (string.IsNullOrEmpty(dbObj.Id) && !Guid.Empty.Equals(Id))
                dbObj.Id = Id.ToString();
            dbObj.Name = Name;
        }
    }
}