using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using EnVisage.Code;

namespace EnVisage.Models
{
    public class TrainingModel : IBaseModel<Training>, IValidatableObject
    {
        public Guid Id { get; set; }
        [Required]
        [Display(Name = "Start Date")]
        [DataType(DataType.Date), DisplayFormat(DataFormatString = "{0:MM/dd/yy}", ApplyFormatInEditMode = true)]
        public DateTime TrainingStartDate { get; set; }
        [Required]
        [Display(Name = "End Date")]
        [DataType(DataType.Date), DisplayFormat(DataFormatString = "{0:MM/dd/yy}", ApplyFormatInEditMode = true)]
        public DateTime TrainingEndDate { get; set; }
        [Required]
        [Display(Name = "Name")]
        public string TrainingName { get; set; }
        [Required]
        [Display(Name = "Type")]
        public Guid TrainingTypeId { get; set; }
        [Display(Name = "Type")]
        public string TrainingTypeName { get; set; }
        [Required]
        [Display(Name = "Cost")]
        public decimal TrainingCost { get; set; }
        [Required]
        [Display(Name = "% Time Allocated")]
        [Range(0, 100)]
        [UIHint("Slider")]
        public short TrainingTimeAllocated { get; set; }
        //public decimal UOMValue { get; set; }
        [Display(Name = "Duration")]
        public int? TrainingDuration
        {
            get { return  (TrainingEndDate.Subtract(TrainingStartDate).Days + 1); }
        }
        public List<PeopleResourceTrainingModel> PeopleResourceTrainings { get; set; }
        [Required]
        [Display(Name = "Resources")]
        [UIHint("Resources")]
        public List<Guid> Resources { get; set; }
        [Required]
        [Display(Name = "Weekends")]
        [UIHint("Weekends")]
        public List<DateTime> Weekends { get; set; }
        public int WeekendingDay { get; set; }
        public TrainingModel()
        {
            PeopleResourceTrainings = new List<PeopleResourceTrainingModel>();
            Weekends = new List<DateTime>();
        }
 
        public void CopyTo(Training obj)
        {
            if (obj == null)
                throw new ArgumentNullException();

            obj.StartDate = TrainingStartDate;
            obj.EndDate = TrainingEndDate;
            obj.Name = TrainingName;
            obj.TrainingTypeId = TrainingTypeId;
            obj.Cost = TrainingCost;
            obj.PercentAllocated = TrainingTimeAllocated;
            obj.PeopleResourceTrainings = PeopleResourceTrainings.Select(t =>
            {
                var o = new PeopleResourceTraining();
                t.CopyTo(o);
                return o;
            }).ToList();
			obj.Weekends = string.Join(",", Weekends.Select(t => t.ToShortDateString()));
		}
        public static explicit operator TrainingModel(Training obj)
        {
            if (obj == null)
                return null;
            var model = new TrainingModel
            {
                Id = obj.Id,
                TrainingStartDate = obj.StartDate,
                TrainingEndDate = obj.EndDate,
                TrainingName = obj.Name,
                TrainingCost = obj.Cost,
                TrainingTimeAllocated = obj.PercentAllocated,
                Resources = obj.PeopleResourceTrainings.Select(x=>x.PeopleResourceId).ToList(),
                Weekends = obj.Weekends.Split(new []{','}, StringSplitOptions.RemoveEmptyEntries).Select(c =>
                    {
                        DateTime dt;
                        return DateTime.TryParse(c, out dt) ? dt : DateTime.MinValue;
                    }).Where(t=>t != DateTime.MinValue).ToList()
            };
			var str = string.Empty;
			foreach (var dateTime in model.Weekends)
			{
				if (!string.IsNullOrEmpty(str))
					str += ",";
				str += "'" + dateTime.ToShortDateString() + "'";
			}
           
            model.TrimStringProperties();
            return model;
        }
        public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
        {
            if (TrainingStartDate > TrainingEndDate)
                yield return new ValidationResult("End Date should be greater than Start Date", new[] { "StartDate", "EndDate" });
        }
    }
    public class PeopleResourceTrainingModel : IBaseModel<PeopleResourceTraining>
    {
        public Guid Id { get; set; }
        public Guid PeopleResourceId { get; set; }
        public int HoursOff { get; set; }
        public Guid TrainingId { get; set; }
        public DateTime WeekEndingDate { get; set; }

        public void CopyTo(PeopleResourceTraining obj)
        {
            if (obj == null)
                throw new ArgumentNullException();

            obj.HoursOff = HoursOff;
            obj.PeopleResourceId = PeopleResourceId;
            obj.TrainingId = TrainingId;
            obj.WeekEndingDate = WeekEndingDate;
        }
    }
}