using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Windows;
using System.Windows.Media.Imaging;
using Comal.Classes;
using InABox.Clients;
using InABox.Core;
using InABox.DynamicGrid;

namespace PRSDesktop
{
    
    internal class EmployeeRoleGrid : DynamicDataGrid<EmployeeRole>
    {

        public EmployeeRoleGrid()
        {
            ColumnsTag = "EmployeeRoles";

            Options.BeginUpdate()
                .Clear()
                .Add(DynamicGridOption.SelectColumns)
                .Add(DynamicGridOption.AddRows)
                .Add(DynamicGridOption.DeleteRows)
                .Add(DynamicGridOption.MultiSelect)
                .EndUpdate();
        }

        public Guid EmployeeID { get; set; }

        
        protected override void Reload(Filters<EmployeeRole> criteria, Columns<EmployeeRole> columns, ref SortOrder<EmployeeRole> sort,
            Action<CoreTable, Exception> action)
        {
            if (EmployeeID == Guid.Empty)
                criteria.Add(new Filter<EmployeeRole>().None());
            else
                criteria.Add(new Filter<EmployeeRole>(x => x.EmployeeLink).LinkValid(EmployeeID));
            base.Reload(criteria, columns, ref sort, action);
        }

        protected override bool CanCreateItems()
        {
            return EmployeeID != Guid.Empty;
        }

        protected override bool CanDeleteItems(params CoreRow[] rows)
        {
            return EmployeeID != Guid.Empty;
        }

        protected override EmployeeRole CreateItem()
        {
            var result = base.CreateItem();
            result.EmployeeLink.ID = EmployeeID;
            return result;
        }
        
        protected override void DoAdd(bool OpenEditorOnDirectEdit = false)
        {
            if (EmployeeID == Guid.Empty)
                MessageBox.Show("Please select an Employee first!");
            else
            {
                var ids = Data.ExtractValues<EmployeeRole, Guid>(c => c.RoleLink.ID).Distinct().ToArray();
                MultiSelectDialog<Role> dlg = new MultiSelectDialog<Role>(
                    new Filter<Role>(x => x.ID).NotInList(ids),
                    new Columns<Role>(x => x.ID).Add(x => x.Code).Add(x => x.Description),
                    true);
                if (dlg.ShowDialog() == true)
                {
                    List<EmployeeRole> updates = new List<EmployeeRole>();
                    foreach (var newid in dlg.IDs())
                    {
                        EmployeeRole newrole = new EmployeeRole();
                        newrole.EmployeeLink.ID = EmployeeID;
                        newrole.RoleLink.ID = newid;
                        updates.Add(newrole);
                    }

                    if (updates.Any())
                    {
                        new Client<EmployeeRole>().Save(updates, "Updated by User");
                        Refresh(false, true);
                        DoChanged();
                    }

                }
            }
        }
    }
        
}