using GreenTree.Nachtragsmanagement.Core.Domain.Deviation;
using GreenTree.Nachtragsmanagement.Web.Models.Appendix;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace GreenTree.Nachtragsmanagement.Web.Models.Deviation
{
    public class DeviationDataModel 
        : IRequireStatusDataModel, IRequireKindDataModel
    {
        public int Id { get; set; }
        public string CustomNumber { get; set; }
        public string Description { get; set; }
        public DateTime? ReceiptDate { get; set; }
        public DateTime? AppendixDate { get; set; }
        public decimal Value { get; set; }
        public decimal Percentage { get; set; }
        public decimal PercentageValue { get; set; }
        public int? StatusId { get; set; }
        public string StatusDescription { get; set; }
        public int? KindId { get; set; }
        public string KindDescription { get; set; }
        public string Comment { get; set; }
        public string SiteDescription { get; set; }
        public int? SiteId { get; set; }
        public string AppendixDescription { get; set; }
        public int? AppendixId { get; set; }
        public int? DaysReceiptToAppendixOffering { get; set; }
        public ICollection<string> DisturbanceEntities { get; set; }
        public ICollection<DisturbanceValueDataModel> DisturbanceValueEntities { get; set; }
        public string DisturbanceValuesDescription
        {
            get
            {
                if (DisturbanceValueEntities == null)
                    return String.Empty;
                else
                    return String.Join(", ", DisturbanceValueEntities.Select(d => d.Description));
            }
        }

        public DeviationDataModel()
        {
            DisturbanceEntities = new List<string>();
            DisturbanceValueEntities = new List<DisturbanceValueDataModel>();
        }

        public static DeviationDataModel FromDeviation(Core.Domain.Deviation.Deviation deviationEntity, bool newWhenIsNull)
        {
            if (deviationEntity == null && newWhenIsNull)
                return new DeviationDataModel
                {
                    Id = -1,
                    Percentage = 100
                };

            if (deviationEntity == null && !newWhenIsNull)
                throw new ArgumentNullException("deviationEntity", "Cannot create DeviationDataModel from NULL deviation entity.");

            var model = new DeviationDataModel
            {
                Id = deviationEntity.Id,
                CustomNumber = deviationEntity.CustomNumber,
                Description = deviationEntity.Description,
                ReceiptDate = deviationEntity.ReceiptDate,
                AppendixDate = deviationEntity.AppendixDate,
                Value = deviationEntity.Value.Value,
                Percentage = deviationEntity.Percentage.HasValue
                    ? deviationEntity.Percentage.Value
                    : (decimal)1.0,
                PercentageValue = deviationEntity.Value.HasValue && deviationEntity.Percentage.HasValue
                    ? deviationEntity.Value.Value * deviationEntity.Percentage.Value
                    : 0,
                SiteId = deviationEntity.SiteId,
                SiteDescription = deviationEntity.Site == null
                    ? deviationEntity.Appendix == null
                        ? String.Empty
                        : deviationEntity.Appendix.Site == null
                            ? String.Empty
                            : deviationEntity.Appendix.Site.CustomNumber
                    : deviationEntity.Site.CustomNumber,
                AppendixId = deviationEntity.AppendixId,
                AppendixDescription = deviationEntity.Appendix == null
                    ? "Offen"
                    : deviationEntity.Appendix.CustomNumber,
                StatusId = deviationEntity.StatusId.Value,
                StatusDescription = deviationEntity.Status == null
                    ? null
                    : deviationEntity.Status.Description,
                KindId = deviationEntity.KindId.Value,
                KindDescription = deviationEntity.Kind == null
                    ? null
                    : deviationEntity.Kind.Description,
                Comment = deviationEntity.Comment,
                DaysReceiptToAppendixOffering = deviationEntity.Appendix == null
                    ? null
                    : deviationEntity.Appendix.OfferingDate.HasValue && deviationEntity.ReceiptDate.HasValue
                        ? (int?)(deviationEntity.Appendix.OfferingDate.Value - deviationEntity.ReceiptDate.Value).Days
                        : null,
                DisturbanceValueEntities =
                    deviationEntity.DisturbanceValues
                        .Select(r =>
                            new DisturbanceValueDataModel
                            {
                                DisturbanceId = r.DisturbanceId,
                                Description = String.Format("{0} - {1:c2}", r.Disturbance.Description, r.Value),
                                Value = r.Value
                            })
                        .ToList()
            };

            foreach (var disturbance in model.DisturbanceValueEntities)
            {
                var json = JsonConvert.SerializeObject(disturbance);

                disturbance.Json = json;

                model.DisturbanceEntities.Add(json);
            }

            return model;
        }

        public Core.Domain.Deviation.Deviation ToDeviation()
        {
            return new Core.Domain.Deviation.Deviation
            {
                Id = this.Id,
                CustomNumber = this.CustomNumber,
                Description = Description,
                ReceiptDate = this.ReceiptDate,
                AppendixDate = this.AppendixDate,
                Value = this.Value,
                Percentage = this.Percentage,
                SiteId = this.SiteId,
                AppendixId = this.AppendixId,
                StatusId = this.StatusId,
                KindId = this.KindId,
                Comment = this.Comment
            };
        }
    }
}