using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Web.Mvc;

namespace EnVisage.Models
{
    public class RateModel : IBaseModel<Rate>
    {
        #region enums and subclasses
        public enum RateType
        {
            Global = 0,
            Derived = 1
        }
        #endregion

        public Guid Id { get; set; }
        public Guid? ParentId { get; set; }
        public Guid ExpenditureCategoryId { get; set; }
        public RateType Type { get; set; }

        [Required]
        [Display(Name = "Rate")]
        [DisplayFormat(DataFormatString = "{0:0.00}", ApplyFormatInEditMode = true)]
        [Range(typeof(Decimal), "0.01", "9999999.99", ErrorMessage = "{0} must be a decimal/number between {1} and {2}.")]
        public decimal Rate1 { get; set; }
        
        [Display(Name = "Start Date")]
        [DataType(DataType.Date), DisplayFormat(DataFormatString = "{0:MM/dd/yy}", ApplyFormatInEditMode = true)]
        public DateTime StartDate { get; set; }
        
        [Display(Name = "End Date")]
        [DataType(DataType.Date), DisplayFormat(DataFormatString = "{0:MM/dd/yy}", ApplyFormatInEditMode = true)]
        [DateGreaterThanOrEqualAttribute("StartDate", "Rate End Date should not be less than Start Date")]
        public DateTime EndDate { get; set; }

        public Guid? DerivedObjectId { get; set; }
        public int FreezeRate { get; set; }


        //public virtual ExpenditureCategory ExpenditureCategory { get; set; }


        /// <summary>
        /// Casts a <see cref="Rate"/> obect to the object of type <see cref="RateModel"/>.
        /// </summary>
        /// <param name="obj">A <see cref="Rate"/> object.</param>
        /// <returns>A <see cref="RateModel"/> object filled with data from db.</returns>
        public static explicit operator RateModel(Rate obj)
        {
            if (obj == null)
                return null;
            var model = new RateModel
            {
                Id = obj.Id,
                ParentId = obj.ParentId,
                ExpenditureCategoryId = obj.ExpenditureCategoryId,
                Type = (RateType)obj.Type,
                Rate1 = obj.Rate1,
                StartDate = obj.StartDate,
                EndDate = obj.EndDate,
                DerivedObjectId = obj.DerivedId,
                FreezeRate = obj.FreezeRate,
            };
            return model;
        }

        /// <summary>
        /// Copies data from model to DAL object.
        /// </summary>
        /// <param name="dbObj">A target DAL object.</param>
        public void CopyTo(Rate dbObj)
        {
            if (dbObj == null)
                throw new ArgumentNullException();
            dbObj.ParentId = ParentId;
            dbObj.ExpenditureCategoryId = ExpenditureCategoryId;
            dbObj.Type = (short)Type;
            dbObj.Rate1 = Rate1;
            dbObj.StartDate = StartDate;
            dbObj.EndDate = EndDate;
            dbObj.DerivedId = DerivedObjectId;
            dbObj.FreezeRate = FreezeRate;
        }

    }
}