using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Web;
using System.Reflection;

namespace Weee.Models.ExtensionMethods
{
    public static class Extension
    {
        // to use this function , pease make sure all the enum value have a display attribute
        public static string DisplayString(this Enum enumValue)
        {
            var enumType = enumValue.GetType();
            var Resource = enumType.GetMember(enumValue.ToString())
                                .First()
                                .GetCustomAttribute<DisplayAttribute>()
                                .ResourceType;
            var name = enumType.GetMember(enumValue.ToString())
                                .First()
                                .GetCustomAttribute<DisplayAttribute>()
                                .Name;
            return Resource.GetProperty(name).GetValue(name).ToString();
        }

        public static int Months(this LCA LCAValue)
        {
            return LCAValue.EndDate.Month - LCAValue.StartDate.Month + 1 + 12 * (LCAValue.EndDate.Year - LCAValue.StartDate.Year);
        }

        public static string MonthLabel(this MonthlyData Value)
        {
            if ((Value.StartBase + Value.Index) % 12 == 0) return "12";
            return ((Value.StartBase + Value.Index) % 12).ToString();
        }

        public static decimal Multiply(this IEnumerable<decimal> self)
        {
            decimal result = 1m;
            foreach (var item in self)
            {
                result =result* item;
            }
            return result;
        }
    }
}