using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Sarand.Core.Base;
using Sarand.Core.Bus;
using Sarand.PatientMgr.Core.App;

namespace Sarand.PatientMgr.Core.Bus
{
	//=======================================================================
	public abstract class SpmAdmissionAction : SacsHierarchyItem
	{
		//-------------------------------------------------------------------
		// Columns.
		public enum Column
		{
			Pos,
			Id,
			AdmissionId,
			Type,
			Type_Desc,
			// Admission details.
			Admission_FacilityId,
			Admission_TemplateId,
			AdmissionFrom,
			AdmissionFromDateTime,
			AdmissionFromDate,
			AdmissionFromTime,
			AdmissionTo,
			AdmissionToDate,
			AdmissionToTime,
			AdmissionType,
			AdmissionTypeDesc,
			AdmissionNotes,
			AdmissionFlags,
			AdmissionStatus,
			AdmissionStatusInd,
			// Admission patient details.
			Patient,        // No & display name.
			PatientId,
			PatientNo,
			PatientSurname,
			PatientForename,
			// Facility:
			Facility_Name,
			Facility_Desc,
			Facility_Notes,
			// Facility Template.
			Template_Name,
			Template_Desc,
			Template_Notes,
			// Session definition (combined template and date-specific session info).
			SessionDfn_Summary,

			// Common properties.
			Notes,
			Flags,
			Status,
			Status_Ind,
			Status_Desc,
			CreateOn_Date,
			UpdateOn_Date,
		}

		// Data.
		public new class Data : SacsHierarchyItem.Data
		{
			public Data()
			{
				//Status = AdmissionActionStatus;
			}
			public SysId AdmissionId { get; set; }
			public Spm.AdmissionActionType AdmissionActionType { get; set; }
			public DateTime Raised { get; set; }
			public SysId EmployeeIdRaised { get; set; }
			public DateTime Completed { get; set; }
			public SysId EmployeeIdCompleted { get; set; }
			public String ActionData { get; set; }
			internal void PopulateFrom(Data data)
			{
				AdmissionId = data.AdmissionId;
				AdmissionActionType = data.AdmissionActionType;
				Raised = data.Raised;
				EmployeeIdRaised = data.EmployeeIdRaised;
				Completed = data.Completed;
				EmployeeIdCompleted = data.EmployeeIdCompleted;
				ActionData = data.ActionData;
				base.PopulateFrom(data);
			}
			public Data Clone()
			{
				Data data = new Data();
				data.PopulateFrom(this);
				return data;
			}
		}

		// ErrField.
		public new class ErrField : SacsHierarchyItem.ErrField
		{
			public ValidValue AdmissionId { get; set; } = ValidValue.Valid;
			public ValidValue AdmissionActionType { get; set; } = ValidValue.Valid;
			public ValidValue Raised { get; set; } = ValidValue.Valid;
			public ValidValue EmployeeIdRaised { get; set; } = ValidValue.Valid;
			public ValidValue Completed { get; set; } = ValidValue.Valid;
			public ValidValue EmployeeIdCompleted { get; set; } = ValidValue.Valid;
			public ValidValue ActionData { get; set; } = ValidValue.Valid;
		}

		//-------------------------------------------------------------------
		// Data members.
		private readonly Data data = new Data();

		//-------------------------------------------------------------------
		// Construction.
		protected SpmAdmissionAction(SysId id, SysId admissionId, Spm.AdmissionActionType admissionActionType) : base(id)
		{
			id = Id;
			admissionId = AdmissionId;
			admissionActionType = AdmissionActionType;
			Status = DefaultStatus;
			base.SetData(data);
		}

		//-------------------------------------------------------------------
		// Status.
		private static readonly List<SaStatus> admissionActionStatuses = new List<SaStatus>()
		{
			SaStatus.Current,
		};
		public static SaStatus DefaultStatus { get { return SaStatus.Current; } }
		public static List<SaStatus> AdmissionActionStatuses { get { return new List<SaStatus>(admissionActionStatuses); } }
		public static DataValue.TriStateType GetStatusTriState(SaStatus status)
		{
			admissionActionStatuses.Add(SaStatus.Current);

			switch (status)
			{
				case SaStatus.Current:
					return DataValue.TriStateType.Green;
			}
			return DataValue.TriStateType.Unknown;
		}

		//-------------------------------------------------------------------
		// Utilities.

		//-------------------------------------------------------------------
		// Properties.
		public Data GetData() { return data.Clone(); }
		public void SetData(Data data)
		{
			String fn = GetType().Name + ".SetData";
			// Properties that cannot be changed if previously specified.
			if (SysId.IsValid(Id) && SysId.ToInt(Id) != SysId.ToInt(data.Id))
				throw new NotSupportedException(fn + " Id cannot be changed");
			this.data.PopulateFrom(data);
		}

		//-------------------------------------------------------------------
		// Attributes.
		public SysId AdmissionId
		{
			get { return data.AdmissionId; }
			set { CheckChanged(data.AdmissionId, value); data.AdmissionId = value; }
		}
		public Spm.AdmissionActionType AdmissionActionType
		{
			get { return data.AdmissionActionType; }
			set { CheckChanged((int)data.AdmissionActionType, (int)value); data.AdmissionActionType = value; }
		}
		public DateTime Raised
		{
			get { return data.Raised; }
			set { CheckChanged(data.Raised, value); data.Raised = value; }
		}
		public SysId EmployeeIdRaised
		{
			get { return data.EmployeeIdRaised; }
			set { CheckChanged(data.EmployeeIdRaised, value); data.EmployeeIdRaised = value; }
		}
		public DateTime Completed
		{
			get { return data.Completed; }
			set { CheckChanged(data.Completed, value); data.Completed = value; }
		}
		public SysId EmployeeIdCompleted
		{
			get { return data.EmployeeIdCompleted; }
			set { CheckChanged(data.EmployeeIdCompleted, value); data.EmployeeIdCompleted = value; }
		}
		public String ActionData
		{
			get { return data.ActionData; }
			set { CheckChanged(data.ActionData, value); data.ActionData = value; }
		}

		//-------------------------------------------------------------------
		// Flags.



		public int Compare(SpmAdmissionAction action)
		{
			SaStatus status1 = new SaStatus();
			SaStatus status2 = action.Status;
			// 'Required' actions always occur earlier in the list.
			if (status1 == SaStatus.Required && status2 != SaStatus.Required) return -1;
			if (status1 != SaStatus.Required && status2 == SaStatus.Required) return 1;
			// Followed by 'Completed' actions.
			if (status1 == SaStatus.Completed && status2 != SaStatus.Completed) return -1;
			if (status1 != SaStatus.Completed && status2 == SaStatus.Completed) return 1;
			// Sort by 'Raised' date.
			int iCompareRaised = Raised.CompareTo(action.Raised);
			if (iCompareRaised != 0) return iCompareRaised;
			// Sort by type.
			if (AdmissionActionType < action.AdmissionActionType) return -1;
			if (AdmissionActionType > action.AdmissionActionType) return 1;
			return -1;  // To retain previous sequence.
		}

		//-------------------------------------------------------------------
		//          A s s o c i a t e d   D a t a   E l e m e n t s
		//-------------------------------------------------------------------

		//-------------------------------------------------------------------
		//                            P a r a m s
		//-------------------------------------------------------------------
		/// <summary>Parameters - used to define the filters that should be applied to a List of Addresses</summary>
		// List parameters.
		public enum StatusCat
		{
			Any,
		}
		/// <summary> Item list parameters. </summary>
		public new class Params : SacsHierarchyItem.Params
		{
			// List filtering.
			public List<SysId> IncludedIds { get; } = new List<SysId>();
			public List<SysId> ExcludedIds { get; } = new List<SysId>();
			// Admission Action.
			public SysId Id { get; set; }
			public SysId AdmissionId { get; set; }
			public SysId DepartmentId { get; set; }
			public SysId FacilityId { get; set; }
			public Spm.AdmissionActionType AdmissionActionType { get; set; }
			public DateTime Raised { get; set; }
			public SysId EmployeeIdRaised { get; set; }
			public DateTime Completed { get; set; }
			public SysId EmployeeIdCompleted { get; set; }
			public String ActionData { get; set; }
			public bool RequiredOnly { get; set; } = true;
			public bool ExcludeCancelled { get; set; } = true;

			public StatusCat StatusCat { get; set; } = StatusCat.Any;
		}
		//-------------------------------------------------------------------
	}
	//=======================================================================
	//                 AdmissionAction   D a t a   L i s t
	//=======================================================================
	public static class SpmAdmissionActionList
	{		
		public static int CompareByNameSeq(SpmAdmissionAction action1, SpmAdmissionAction action2)
		{
			if (action1 == null || action2 == null) return 0;
			return action1.Compare(action2);
		}
		public enum SortMode { SortActionRequiredRaised, };

		public static void Sort(this List<SpmAdmissionAction> values, SortMode sortActionRequiredRaised, bool ascending = true)
		{
			if (sortActionRequiredRaised == SortMode.SortActionRequiredRaised)
				values.Sort
					(
						delegate (SpmAdmissionAction action1, SpmAdmissionAction action2)
						{
							return CompareByNameSeq(action1, action2);
						}
					);
		}
		public static bool SetIdentity(this List<SpmAdmissionAction> values, SpmAdmission admission)
		{
			foreach (SpmAdmissionAction admissionAction in values)
				admissionAction.AdmissionId = admission.Id;
			return true;
		}

		// HasAction

		// HasRequiredAction

		public static bool Find(this List<SpmAdmissionAction> values, SpmAdmissionAction admissionAction)
		{
			if (admissionAction == null) return false;
			return (values.Find(item => item == admissionAction) != null);
		}
		public static bool FindById(this List<SpmAdmissionAction> values, SysId admissionActionId)
		{
			if (!SysId.IsValid(admissionActionId)) return false;
			return values.Exists(item => item.Id.Equals(admissionActionId));
		}
		public static bool FindByType(this List<SpmAdmissionAction> values, String admissionActionType)
		{
			if (StringUtil.IsEmpty(admissionActionType)) return false;
			return values.Exists(item => item.AdmissionActionType.ToString().EqualsCI(admissionActionType));
		}
	}

	//=======================================================================
}