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

namespace EnVisage.Models
{
    public class UOMModel : IBaseModel<UOM>
    {
        public Guid Id { get; set; }

        [Required]
        [MaxLength(50)]
		[Display(Name="Unit of Measure Name")]
        public string Name { get; set; }

        [Display(Name = "Value")]
        public decimal UOMValue { get; set; }

		[Display(Name = "Number of Expenditure Categories")]
        public int ExpenditureCategoryCount { get; set; }

        /// <summary>
        /// Casts a <see cref="UOM"/> obect to the object of type <see cref="UOMModel"/>.
        /// </summary>
        /// <param name="obj">A <see cref="UOM"/> object.</param>
        /// <returns>A <see cref="UOMModel"/> object filled with data from db.</returns>
        public static explicit operator UOMModel(UOM obj)
        {
            if (obj == null)
                return null;
            var model = new UOMModel
            {
                Id = obj.Id,
                Name = obj.Name,
                UOMValue = obj.UOMValue,
                ExpenditureCategoryCount = obj.ExpenditureCategory.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(UOM dbObj)
        {
            if (dbObj == null)
                throw new ArgumentNullException();

            dbObj.Name = Name;
            dbObj.UOMValue = UOMValue;
        }

    }
}