using System.Collections;
using System.Collections.Generic;
using System.Linq;

namespace Pinwheel.Reporting
{
    public class AwardReport : IEnumerable<AwardSummary>
    {
        private readonly IEnumerable<AwardSummary> awards;

        public long TotalCount
        {
            get { return awards.Sum(a => a.Count); }
        }

        private double? _TotalScore;
        public double TotalScore
        {
            get
            {
                if (_TotalScore == null && awards != null && TotalCount > 0)
                    _TotalScore = awards.Sum(a => a.TotalScore);

                return _TotalScore.HasValue ? _TotalScore.Value : default(double);
            }
        }

        public AwardReport(IEnumerable<AwardSummary> awards)
        {
            this.awards = awards;
        }

        public IEnumerator<AwardSummary> GetEnumerator()
        {
            return awards.GetEnumerator();
        }

        IEnumerator IEnumerable.GetEnumerator()
        {
            return GetEnumerator();
        }
    }
}