using System;
using System.Collections.Generic;
using System.Linq;
using Comal.Classes;
using InABox.Clients;
using InABox.Core;
using InABox.DynamicGrid;

namespace PRSDesktop
{
    public class MeetingAssignmentGrid :DynamicDataGrid<Assignment>
    {
        
        public MeetingModel? Model { get; set; }
        
        public MeetingAssignmentGrid()
        {
            Options.BeginUpdate()
                .Clear()
                .Add(DynamicGridOption.AddRows)
                .Add(DynamicGridOption.DeleteRows)
                .Add(DynamicGridOption.MultiSelect)
                .EndUpdate();
        }

        protected override DynamicGridColumns LoadColumns()
        {
            return new DynamicGridColumns()
            {
                new DynamicGridColumn()
                {
                    ColumnName = CoreUtils.GetFullPropertyName<Assignment, String>(x => x.EmployeeLink.Name, "."), 
                    Width = 0
                }
            };
        }

        protected override void Reload(Filters<Assignment> criteria, Columns<Assignment> columns, ref SortOrder<Assignment>? sort, Action<CoreTable?, Exception?> action)
        {
            var meetingfilter = (Model == null) || (Model.ID == Guid.Empty)
                ? new Filter<Assignment>().None()
                : new Filter<Assignment>(x => x.Meeting.Link.ID).IsEqualTo(Model.ID);
            criteria.Add(meetingfilter);
            base.Reload(criteria, columns, ref sort, action);
        }

        protected override bool CanCreateItems()
        {
            return Model == null
                ? false
                : base.CanCreateItems();
        }

        protected override Assignment CreateItem()
        {
            var result = base.CreateItem();
            result.Meeting.Link.ID = Model.ID;
            return result;
        }

        protected override void DoAdd(bool OpenEditorOnDirectEdit = false)
        {
            var employeeids = Data.ExtractValues<Assignment, Guid>(x => x.EmployeeLink.ID).Distinct().ToArray();

            var existingfilter = employeeids.Any() ? new Filter<Employee>(x => x.ID).NotInList(employeeids) : null;
            var defaultfilter = LookupFactory.DefineFilter<Employee>();
            var filter = existingfilter != null
                ? existingfilter.And(defaultfilter)
                : defaultfilter;
            MultiSelectDialog<Employee> dlg = new MultiSelectDialog<Employee>(filter, LookupFactory.DefineColumns<Employee>(), true);
            if (dlg.ShowDialog() == true)
            {
                List<Assignment> updates = new List<Assignment>();
                foreach (var item in dlg.Items())
                {
                    Assignment assignment = new Assignment();
                    assignment.EmployeeLink.ID = item.ID;
                    assignment.EmployeeLink.Synchronise(item);
                    assignment.Meeting.Link.ID = Model.ID;
                    assignment.Date = Model.Date;
                    assignment.Booked.Start = Model.Start;
                    assignment.Booked.Finish = Model.Finish;
                    assignment.ActivityLink.ID = Model.ActivityID;
                    assignment.Title = Model.Title;
                    assignment.Description = Model.Description;
                    updates.Add(assignment);
                }

                if (updates.Any())
                    new Client<Assignment>().Save(updates, "Added by Meeting Editor");
                Refresh(false, true);
            }
        }

    }
}