using FastReport;
using InABox.Clients;
using InABox.Core;
using InABox.Database;
using InABox.DynamicGrid;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace PRSServer.Forms
{
    class DeletedEntityGrid<T> : DynamicGrid<T>, ISpecificGrid where T : Entity, new()
    {

        private CoreTable Table { get; set; }

        public DeletedEntityGrid(CoreTable table)
        {
            Table = table;

            HiddenColumns.Add(x => x.ID);

            Options.BeginUpdate().Clear()
                .AddRange(DynamicGridOption.EditRows).EndUpdate();
        }

        protected override DynamicGridColumns LoadColumns()
        {
            var result = base.LoadColumns();

            var deletionColumns = DeletionData.DeletionColumns<T>();

            var columns = new DynamicGridColumns();
            foreach(var column in deletionColumns.GetColumns())
            {
                var resultColumn = result.FirstOrDefault(x => x.ColumnName == column.Property);
                if(resultColumn is not null)
                {
                    columns.Add(resultColumn);
                }
            }

            if(columns.Count == 0)
            {
                columns.Add<T, Guid>(x => x.ID, 0, "ID", "", Alignment.MiddleLeft);
            }

            return columns;
        }

        protected override void Reload(Filters<T> criteria, Columns<T> columns, ref SortOrder<T>? sort, Action<CoreTable?, Exception?> action)
        {
            try
            {
                action(Table, null);
            }
            catch(Exception e)
            {
                action(null, e);
            }
        }

        protected override T LoadItem(CoreRow row)
        {
            return Table.Rows[row.Index].ToObject<T>();
        }

        protected override void DoEdit()
        {
            if (!SelectedRows.Any())
                return;

            var item = LoadItem(SelectedRows.First());

            var editor = new DynamicEditorForm(typeof(T));
            editor.ReadOnly = true;
            editor.OnCustomiseColumns += Editor_OnCustomiseColumns;
            editor.OnDefineLookups += sender => DefineLookups(sender, Array.Empty<T>());
            editor.Items = new BaseObject[] { item };
            editor.ShowDialog();
        }

        private DynamicGridColumns Editor_OnCustomiseColumns(object sender, DynamicGridColumns? source)
        {
            var columns = new DynamicGridColumns();
            columns.ExtractColumns(typeof(T));
            var deletionColumns = DeletionData.DeletionColumns<T>();
            columns.RemoveAll(x => !deletionColumns.GetColumns().Any(y => y.Property == x.ColumnName));
            return columns;
        }

        public override void SaveItem(T item)
        {
            // No saving allowed
        }

        protected override void DeleteItems(params CoreRow[] rows)
        {
            // No deleting allowed
        }
    }
}