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

namespace EnVisage.Models
{
    public class ScenarioDetailModel : IBaseModel<Scenario>
    {
        #region Enums and subclasses
        public enum ScenarioProbability
        {
            Low = 1,
            Expected = 2,
            High = 3
        }

        public enum SavingsType
        {
            HardSavings,
            SoftSavings
        }
        #endregion

        #region Properties
        public Guid Id { get; set; }

        [Required]
        [AllowHtml]
        [MaxLength(100)]
        public string Name { get; set; }

        /// <summary>
        /// Gets or sets an Id of the template.
        /// </summary>
        [Display(Name = "Template")]
        public Guid TemplateId { get; set; }

        [Display(Name = "Template Name")]
        public string TemplateName{ get; set; }

        [Display(Name = "Project Name")]
        public string ProjectName { get; set; }

        /// <summary>
        /// Gets or sets an Id of the project.
        /// </summary>
        public Guid ParentId { get; set; }

        /// <summary>
        /// Gets or sets a color that will be used for scenario in reports.
        /// </summary>
        [MaxLength(8)]
        public string Color { get; set; }

        /// <summary>
        /// Gets or sets a type of scenario.
        /// </summary>
        [Required]
        [Display(Name = "Scenario Type")]
        public ScenarioType? Type { get; set; }

        /// <summary>
        /// Gets or sets a scenario of scenario.
        /// </summary>
        [Display(Name = "Scenario Status")]
        public ScenarioStatus? Status { get; set; }

        [Display(Name = "Active Scenario")]
        public bool IsActiveScenario { get; set; }

        [Display(Name = "Freeze Resources")]
        public bool FreezeResources { get; set; }

        [Display(Name = "Use this project's ACTUALS data for weekending dates that apply?")]
        public bool UseActuals { get; set; }

        [Display(Name = "Child Scenarios #")]
        public int ChildScenarios { get; set; }

        // not editable[DataType(DataType.Date), DisplayFormat(DataFormatString = "{0:MM/dd/yy}", ApplyFormatInEditMode = true)]
        [Display(Name = "Scenario Start Date")]
        public DateTime? StartDate { get; set; }

        // not editable[DataType(DataType.Date), DisplayFormat(DataFormatString = "{0:MM/dd/yy}", ApplyFormatInEditMode = true)]
        [Display(Name = "Scenario End Date")]
        public DateTime? EndDate { get; set; }

        [DataType(DataType.Date), DisplayFormat(DataFormatString = "{0:MM/dd/yy}", ApplyFormatInEditMode = true)]
        [Display(Name = "Milestone Start Date")]
        public DateTime? MilestoneStartDate { get; set; }

        [Display(Name = "Scenario End Date")]
        public string EndDateStr { get; set; }

        [Display(Name = "Scenario Start Date")]
        public string StartDateStr { get; set; }

        [Display(Name = "Growth Scenario?")]
        public bool GrowthScenario { get; set; }

        [Display(Name = "Revenue Generating")]
        public bool IsRevenueGenerating { get; set; }

        [Display(Name = "Projected Revenue")]
        public int ProjectedRevenue { get; set; }

        [Display(Name = "Use L&M Margin?")]
        public bool UseLMMargin { get; set; }

        [Display(Name = "Expected Gross Margin")]
        // not editable[Range(1, 100)]
        public int? GrossMargin { get; set; }

        [Display(Name = "L&M Margin")]
        // not editable
        //[Range(1, 100)]
		public int? LMMargin { get; set; }

        [Display(Name = "Calculated Gross Margin (Forecast)")]
        [Range(1, 100)]
		public int? CalculatedGrossMargin { get; set; }

        [Display(Name = "Calculated Gross Margin LM (Forecast)")]
		public int? CalculatedGrossMarginLM { get; set; }

        [Display(Name = "Calculated Gross Margin (Actuals)")]
		public int? CalculatedGrossMarginActuals { get; set; }

        [Display(Name = "Calculated Gross Margin LM (Actuals)")]
        [Range(1, 100)]
		public int? CalculatedGrossMarginLMActuals { get; set; }

        [Display(Name = "Top-Down Direct Costs")]
        public int TDDirectCosts { get; set; }

        [Display(Name = "Top-Down Direct Costs LM")]
        public int TDDirectCostsLM { get; set; }

		[Display(Name = "Top-Down Revenue Per Milestone")]
        public int TDRevenuePerShot { get; set; }

        [Display(Name = "Bottom-Up Direct Costs (Forecast)")]
        public int BUDirectCosts { get; set; }

        [Display(Name = "Bottom-Up Direct Costs LM (Forecast)")]
        public int BUDirectCostsLM { get; set; }

        [Display(Name = "Bottom-Up Direct Costs (Actuals)")]
        public int BUDirectCostsActuals { get; set; }

        [Display(Name = "Bottom-Up Direct Costs LM (Actuals)")]
        public int BUDirectCostsLMActuals { get; set; }

		[Display(Name = "Bottom-Up Costs/Milestones (Forecast)")]
        public int BUCostsShots { get; set; }

		[Display(Name = "Bottom-Up Costs/Milestones LM (Forecast)")]
        public int BUCostsShotsLM { get; set; }

		[Display(Name = "Bottom-Up Costs/Milestones (Actuals)")]
        public int BUCostsShotsActuals { get; set; }

		[Display(Name = "Bottom-Up Costs/Milestones LM (Actuals)")]
        public int BUCostsShotsLMActuals { get; set; }

        [Display(Name = "Total Milestones")]
        // not editable
        //[Range(1, 2147483647)]
        public int TotalMilestones { get; set; }

        [Display(Name = "Labor Split Percentage")]
        // not editable
        //[Range(0, 100)]
        [UIHint("Slider")]
        public short LaborSplitPercentage { get; set; }

        [Display(Name = "Labor/Materials Split")]
        public string LaborMaterialsSplit { get; set; }

        [Display(Name = "Duration")]
        public Nullable<int> Duration { get; set; }


        [Display(Name = "Cost Savings")]
        public int? CostSavings { get; set; }
        [Display(Name = "Cost Savings Duration")]
        public int? CostSavingsDuration { get; set; }
        [Display(Name = "ROI Date")]
        public DateTime? ROIDate { get; set; }
        [Display(Name = "ROI Date")]
        public string ROIDateStr { get { return ROIDate.HasValue ? ROIDate.Value.ToShortDateString() : ""; } set { } }
        [Display(Name = "Hard/Soft Savings")]
        public string HardSoftSavings { get; set; }
		[Display(Name = "Savings After Cost")]
		public int? SavingsAfterCost { get; set; }
		[Display(Name = "Revenue After Cost")]
		public int? RevenueAfterCost { get; set; }

        public ScenarioStatus CopyStatus { get; set; }

        public int CopyProgectId { get; set; }

        public IList<ScenarioModel.ExpenditureItem> Expenditures { get; set; }

        public IList<ScenarioModel.ProjectItem> Projects { get; set; }

        public IList<ScenarioModel.ExpenditureItem> ScenarioExpenditures { get; set; }

        public RatesModel RatesModel { get; set; }

        public string BackUrl { get; set; }
        public string BackName { get; set; }

        public List<Team2Scenario> TeamAllocations { get; set; }
        public string TeamAllocationsJson { get; set; }

        public List<NoteModel> Notes { get {
            List<NoteModel> result = new List<NoteModel>();
            EnVisageEntities DbContext = new EnVisageEntities();
            var notes = (from c in DbContext.Notes where c.ParentId == Id select c).ToList();
            foreach (var note in notes)
                result.Add((NoteModel)note);
            return result;
        } set{} }

        public string ActiveTab { get; set; }

        #endregion

        #region Constructors
        public ScenarioDetailModel()
        {
            Expenditures = new List<ScenarioModel.ExpenditureItem>();
            RatesModel = new RatesModel();
        }
        #endregion

        #region Methods
        /// <summary>
        /// Casts a <see cref="Scenario"/> obect to the object of type <see cref="ScenarioModel"/>.
        /// </summary>
        /// <param name="obj">A <see cref="Scenario"/> object.</param>
        /// <returns>A <see cref="ScenarioModel"/> object filled with data from db.</returns>
        public static explicit operator ScenarioDetailModel(Scenario obj)
        {
            if (obj == null)
                return null;
            var model = new ScenarioDetailModel
                {
                    Id = obj.Id,
                    Name = obj.Name,
                    ProjectName = obj.Project.Name,
                    TemplateName = obj.ParentScenario != null ? obj.ParentScenario.Name : string.Empty,
                    Color = obj.Color,
                    TemplateId = obj.TemplateId ?? Guid.Empty,
                    ParentId = obj.ParentId ?? Guid.Empty,
                    Type = obj.Type == null ? (ScenarioType?) null : (ScenarioType) obj.Type,
                    ChildScenarios = obj.ChildScenarios.Count,
                    EndDate = obj.EndDate,
                    StartDate = obj.StartDate,
                    EndDateStr = (obj.EndDate ?? DateTime.Today).ToString("d"),
                    StartDateStr = (obj.StartDate ?? DateTime.Today).ToString("d"),
                    Status = obj.Status == null ? (ScenarioStatus?)null : (ScenarioStatus)obj.Status,
                    
                    GrossMargin = obj.ExpectedGrossMargin.HasValue ? Convert.ToInt32(obj.ExpectedGrossMargin * 100) : (int?)null,
                    GrowthScenario = obj.GrowthScenario,
                    IsActiveScenario = obj.Status == Code.ScenarioStatus.Active.GetHashCode(),
					LMMargin = obj.ExpectedGrossMargin_LM.HasValue ? Convert.ToInt32(obj.ExpectedGrossMargin_LM * 100) : (int?)null,
                    UseLMMargin = obj.UseLMMargin == 1,
                    LaborSplitPercentage = Convert.ToInt16(obj.CGSplit * 100),
                    MilestoneStartDate = obj.ShotStartDate,
                    ProjectedRevenue = (int)Math.Round(obj.ProjectedRevenue ?? 0),
                    TotalMilestones = obj.Shots ?? 0,
                    Expenditures = new List<ScenarioModel.ExpenditureItem>(),
                    Duration = obj.Duration,
					CalculatedGrossMargin = obj.CalculatedGrossMargin.HasValue ? Convert.ToInt32(obj.CalculatedGrossMargin * 100) : (int?)null,
					CalculatedGrossMarginLM = obj.CalculatedGrossMargin_LM.HasValue ? Convert.ToInt32(obj.CalculatedGrossMargin_LM * 100) : (int?)null,
					CalculatedGrossMarginActuals = obj.CalculatedGrossMargin.HasValue ? Convert.ToInt32(obj.CalculatedGrossMargin * 100) : (int?)null,
					CalculatedGrossMarginLMActuals = obj.CalculatedGrossMargin_LM.HasValue ? Convert.ToInt32(obj.CalculatedGrossMargin_LM * 100) : (int?)null,
                    TDDirectCosts = (int)Math.Round(obj.TDDirectCosts ?? 0),
                    TDDirectCostsLM = (int)Math.Round(obj.TDDirectCosts_LM ?? 0),
                    TDRevenuePerShot = (int)Math.Round(obj.TDRevenueShot ?? 0),
                    BUDirectCosts = (int)Math.Round(obj.BUDirectCosts ?? 0),
                    BUDirectCostsLM = (int)Math.Round(obj.BUDirectCosts_LM ?? 0),
                    BUDirectCostsActuals = (int)Math.Round(obj.Actuals_BUDirectCosts ?? 0),
                    BUDirectCostsLMActuals = (int)Math.Round(obj.Actuals_BUDirectCosts_LM ?? 0),
                    BUCostsShots = (int)Math.Round((((obj.Shots ?? 0) > 0) ? (obj.BUDirectCosts ?? 0) / (obj.Shots ?? 0) : (obj.BUDirectCosts ?? 0))),
                    BUCostsShotsLM = (int)Math.Round((((obj.Shots ?? 0) > 0) ? (obj.BUDirectCosts_LM ?? 0) / (obj.Shots ?? 0) : (obj.BUDirectCosts_LM ?? 0))),
                    BUCostsShotsActuals = (int)Math.Round((((obj.Shots ?? 0) > 0) ? (obj.Actuals_BUDirectCosts ?? 0) / (obj.Shots ?? 0) : (obj.Actuals_BUDirectCosts ?? 0))),
                    BUCostsShotsLMActuals = (int)Math.Round((((obj.Shots ?? 0) > 0) ? (obj.Actuals_BUDirectCosts_LM ?? 0) / (obj.Shots ?? 0) : (obj.Actuals_BUDirectCosts_LM ?? 0))),
                    FreezeResources = Convert.ToBoolean(obj.FreezeRevenue),
                    IsRevenueGenerating = obj.Project.IsRevenueGenerating,
                    CostSavings = (obj.CostSavings.HasValue) ? (int?)obj.CostSavings.Value : (int?)null,
                    CostSavingsDuration = (obj.CostSavingsEndDate.HasValue && obj.CostSavingsStartDate.HasValue) ? (obj.CostSavingsEndDate.Value.Month - obj.CostSavingsStartDate.Value.Month) + 12 * (obj.CostSavingsEndDate.Value.Year - obj.CostSavingsStartDate.Value.Year) + 1  : (int?)null,
                    //TODO: replace with loading of cost savings for all scenarios by single request. See ENV-590.
                    ROIDate = GetROIDate(obj),
                    HardSoftSavings = (obj.CostSavingsType.HasValue) ? (obj.CostSavingsType.Value == 1 ? "Hard" : "Soft") : string.Empty,
					SavingsAfterCost = (int?)null,
					RevenueAfterCost = (int?)null,
                    TeamAllocations = obj.Team2Scenario.OrderBy(x => x.Team.Name).ToList(),
                    TeamAllocationsJson = Newtonsoft.Json.JsonConvert.SerializeObject(obj.Team2Scenario.ToDictionary(c => c.TeamId, c => c.Allocation))
                };
            model.RatesModel = new RatesModel()
                {
                    ScenarioId = model.Id
                };
			if (obj.CostSavings.HasValue && obj.CostSavingsStartDate.HasValue && obj.CostSavingsEndDate.HasValue)
			{
				if (obj.BUDirectCosts.HasValue && obj.CostSavings.Value >= obj.BUDirectCosts.Value)
				{
					model.SavingsAfterCost = (int?)(obj.CostSavings.Value - obj.BUDirectCosts.Value);
				}

				if (model.IsRevenueGenerating)
				{
					model.RevenueAfterCost = model.ProjectedRevenue;

					if (obj.BUDirectCosts.HasValue && obj.CostSavings.Value < obj.BUDirectCosts.Value)
					{
						model.RevenueAfterCost += (int)(obj.CostSavings.Value - obj.BUDirectCosts.Value);
					}
				}
			}

            model.TrimStringProperties();
            return model;
        }

        /// <summary>
        /// Copies data from model to DAL object.
        /// </summary>
        /// <param name="dbObj">A target DAL object.</param>
        public void CopyTo(Scenario dbObj)
        {
            if (dbObj == null)
                throw new ArgumentNullException();
            dbObj.Name = Name;
            dbObj.Color = Color.Replace("#", "");
            dbObj.Type = Type.GetHashCode();
            dbObj.Status = IsActiveScenario ? Code.ScenarioStatus.Active.GetHashCode() : Code.ScenarioStatus.Inactive.GetHashCode();
            dbObj.ShotStartDate = MilestoneStartDate;
        }
        #endregion

        private static DateTime? GetROIDate(Scenario scenario)
        {
            if (!scenario.CostSavings.HasValue)
                return null;
            if (scenario.BUDirectCosts > scenario.CostSavings)
                return null;
            if (scenario.CostSavings1 == null || scenario.CostSavings1.Count == 0)
                return null;
            var costSavingsSum = 0.0M;
            foreach (var costSaving in scenario.CostSavings1.OrderBy(t=>t.Year).ThenBy(t=>t.Month))
            {
                costSavingsSum += costSaving.Cost;
                if (costSavingsSum >= scenario.BUDirectCosts)
                {
                    return new DateTime(costSaving.Year, costSaving.Month, 1);
                }
            }
            return null;
        }
    }
}