using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq.Expressions;
using InABox.Core;

namespace Comal.Classes
{

    [UserTracking("Human Resources")]
    public class Employee : Entity, IEmployee, ISchedulable, IPersistent, IRemotable, IOrgChart<EmployeeLink>, ILicense<CoreLicense>, IExportable,
        IImportable
    {
        
        [UniqueCodeEditor(Visible = Visible.Default, Editable = Editable.Enabled)]
        [EditorSequence(1)]
        public string Code { get; set; }

        [TextBoxEditor]
        [EditorSequence(2)]
        public string Name { get; set; }
                
        [EnumLookupEditor(typeof(EmployeeType))]
        [EditorSequence("Payroll", 3)]
        public EmployeeType Type { get; set; }
        
        [EditorSequence(4)]
        public Address Address { get; set; }
        
        [TextBoxEditor]
        [EditorSequence(5)]
        public string Email { get; set; }

        [TextBoxEditor]
        [EditorSequence(6)]
        public string Mobile { get; set; }
        
        [DateEditor]
        [EditorSequence(7)]
        public DateTime DateOfBirth { get; set; }
        
        [EditorSequence(8)]
        public UserLink UserLink { get; set; }
        
        [CodeEditor(Editable = Editable.Enabled)]
        [EditorSequence(9)]
        [Obsolete("Replaced with EmployeeGroup", true)]
        public string Department { get; set; }

        [EditorSequence(10)]
        public EmployeeGroupLink Group { get; set; }
        
        [EditorSequence(11)]
        public ImageDocumentLink Thumbnail { get; set; }

        [SecondaryIndex]
        [CheckBoxEditor]
        [EditorSequence(12)]
        public bool CanAllocateTasks { get; set; }
        
        [CheckBoxEditor]
        [EditorSequence(13)]
        [Caption("Show In/Out Status?")]
        public bool ShowOnInOutBoard { get; set; }
        
        [SecondaryIndex]
        [DateEditor]
        [EditorSequence("Payroll", 1)]
        public DateTime StartDate { get; set; }

        [SecondaryIndex]
        [DateEditor]
        [EditorSequence("Payroll", 2)]
        public DateTime FinishDate { get; set; }
        
        [EditorSequence("Payroll", 3)]
        [EmbeddedListEditor(typeof(EmployeeRosterItem), DirectEdit = true)]
        public String Roster { get; set; }
        
        [EditorSequence("Payroll", 4)]
        [DateTimeEditor(Visible = Visible.Optional)]
        public DateTime RosterStart { get; set; }

        [EditorSequence("Payroll",5)]
        public OvertimeRuleLink OvertimeRuleLink { get; set; }
        
        [CodeEditor(Editable = Editable.Enabled)]
        [EditorSequence("Payroll",6)]
        public string PayrollID { get; set; }
        
        [EditorSequence("Org Chart", 1)]
        public EmployeePositionLink Position { get; set; }

        [EditorSequence("Org Chart", 2)]
        [EntityRelationship(DeleteAction.Cascade)]
        public EmployeeLink Manager { get; set; }

        [EditorSequence("Org Chart", 3)]
        public OrgChartSettings<EmployeeLink> OrgChart { get; set; }
        
        [NullEditor]
        [Obsolete("Replaced with UserLink.ID", true)]
        public Guid UserID { get; set; }
        
        [NullEditor]
        public int ActiveSchedules { get; set; }

        [NullEditor]
        public byte[]? Signature { get; set; }

        [NullEditor]
        [Obsolete("Replaced with EmployeeRoster class", true)]
        public TimeSpan UsualStart { get; set; }

        [NullEditor]
        [Obsolete("Replaced with EmployeeRoster class", true)]
        public TimeSpan UsualFinish { get; set; }

        protected override void Init()
        {
            base.Init();

            Code = "";
            Name = "";
            Address = new Address();

            Thumbnail = new ImageDocumentLink();

            Group = new EmployeeGroupLink();

            UserLink = new UserLink();
            UserLink.PropertyChanged += UserLink_PropertyChanged;

            OvertimeRuleLink = new OvertimeRuleLink();

            Roster = "";
            RosterStart = DateTime.MinValue;

            Manager = new EmployeeLink();

            Position = new EmployeePositionLink();

            OrgChart = new OrgChartSettings<EmployeeLink>();
        }

        private void UserLink_PropertyChanged(object sender, PropertyChangedEventArgs e)
        {
            //if (e.PropertyName == "ID")
            //    UserID = UserLink.ID;
            if (e.PropertyName == "Type")
                ShowOnInOutBoard = Type == EmployeeType.Employee;
        }

        public override string ToString()
        {
            return Name;
        }

        public static Filter<Employee> ActiveEmployees(DateTime date)
        {
            var start = new Filter<Employee>(x => x.StartDate).IsEqualTo(DateTime.MinValue).Or(x => x.StartDate).IsLessThanOrEqualTo(date);
            var finish = new Filter<Employee>(x => x.FinishDate).IsEqualTo(DateTime.MinValue).Or(x => x.FinishDate).IsGreaterThanOrEqualTo(date);
            return start.And(finish);
        }
    }
}