using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Windows.Media.Imaging;
using InABox.Core;
using InABox.WPF;

namespace InABox.DynamicGrid
{
    public class DynamicExportMappingGrid : DynamicGrid<ImportMapping>
    {
        private readonly BitmapImage selected = Wpf.Resources.Bullet_Tick.AsBitmapImage();

        public DynamicExportMappingGrid()
        {
            HideBlank = false;

            Items = new List<ImportMapping>();
            Selected = new List<ImportMapping>();

            ActionColumns.Add(new DynamicImageColumn(SelectedImage, SelectedAction));
            HiddenColumns.Add(x => x.Key);
        }

        protected override void Init()
        {
        }

        protected override void DoReconfigure(DynamicGridOptions options)
        {
            //options.RecordCount = true;
        }

        public List<ImportMapping> Items { get; }

        public List<ImportMapping> Selected { get; }

        public bool HideBlank { get; set; }

        public override void DeleteItems(params CoreRow[] rows)
        {
            var deletes = new List<ImportMapping>();
            foreach (var row in rows)
                deletes.Add(Items[row.Index]);
            Items.RemoveAll(x => deletes.Contains(x));
            Selected.RemoveAll(x => deletes.Contains(x));
        }

        public override ImportMapping LoadItem(CoreRow row)
        {
            return Items[row.Index];
        }

        protected override void Reload(
            Filters<ImportMapping> criteria, Columns<ImportMapping> columns, ref SortOrder<ImportMapping>? sort, 
            CancellationToken token, Action<CoreTable?, Exception?> action)
        {
            var result = new CoreTable();
            result.LoadColumns(typeof(ImportMapping));
            if (HideBlank)
                result.LoadRows(Items.Where(x => Selected.Contains(x)));
            else
                result.LoadRows(Items);
            action.Invoke(result, null);
        }

        public override void SaveItem(ImportMapping item)
        {
            if (!Items.Contains(item))
                Items.Add(item);
        }

        protected override DynamicGridColumns LoadColumns()
        {
            return new DynamicGridColumns
            {
                new() { ColumnName = "Property", Width = 0 }
            };
        }

        public void ClearAll()
        {
            Selected.Clear();
            Selected.AddRange(Items.Where(x => x.Key));
            Refresh(false, true);
        }

        public void SelectAll()
        {
            Selected.Clear();
            Selected.AddRange(Items);
            Refresh(false, true);
        }

        private BitmapImage SelectedImage(CoreRow? arg)
        {
            if (arg == null)
                return selected;
            var property = arg.Get<ImportMapping, string>(x => x.Property);
            return Selected.Any(x => x.Property.Equals(property)) ? selected : null;
        }

        private bool SelectedAction(CoreRow? arg)
        {
            var property = arg?.Get<ImportMapping, string>(x => x.Property);
            var items = arg == null ? Items.ToArray() : new[] {  Items.Where(x => x.Property.Equals(property)).First() };
            foreach (var item in items)
                if (Selected.Contains(item) && !item.Key)
                    Selected.Remove(item);
                else
                    Selected.Add(item);
            return true;
        }
    }
}