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

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

        [Required]
        [MaxLength(100)]
        [Display(Name="Department")]
		public string Name { get; set; }
        [Required]
        [MaxLength(50)]
		[Display(Name = "Cost Center")]
        public string CreditNumber { get; set; }
		[Display(Name = "Number of Expenditures")]
        public int ExpenditureCategoryCount { get; set; }

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

            dbObj.Name = Name;
            dbObj.CreditNumber = CreditNumber;
        }
    }
    
    /// <summary>
    /// An UI representation of CreditDepartment to be displayed as list items 
    /// </summary>
    public class CreditDepartmentListModel
    {
        public Guid Id { get; set; }
        public string Name { get; set; }
        public string CreditNumber { get; set; }
        public int ExpenditureCount { get; set; }
    }


}