using InABox.Clients;
using InABox.Core;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace InABox.DynamicGrid;

public class DynamicGridItemsListDataComponent<T> : BaseDynamicGridDataComponent<T>
    where T : BaseObject, new()
{
    private List<T> _items = [];

    public List<T> Items
    { 
        get => _items; 
        set => _items = value; 
    }

    public DynamicGridItemsListDataComponent(DynamicGrid<T> grid): base(grid)
    {
    }

    public override void DeleteItems(params CoreRow[] rows)
    {
        foreach (var row in rows.OrderByDescending(x => x.Index))
        {
            Items.RemoveAt(Grid.GetMasterRow(row).Index);
        }
    }

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

    private IOrderedEnumerable<T> OrderItems(IOrderedEnumerable<T> items, SortOrder<T> sort)
    {
        var ordered = items.ThenBy(x => CoreUtils.GetPropertyValue(x, sort.ToString()));
        foreach (var then in sort.Thens)
        {
            ordered = OrderItems(ordered, then);
        }
        return ordered;
    }
    private IOrderedEnumerable<T> OrderItems(IEnumerable<T> items, SortOrder<T> sort)
    {
        var ordered = items.OrderBy(x => CoreUtils.GetPropertyValue(x, sort.ToString()));
        foreach (var then in sort.Thens)
        {
            ordered = OrderItems(ordered, then);
        }
        return ordered;
    }

    public override void Reload(
        Filters<T> criteria, Columns<T> columns, SortOrder<T>? sort, 
        CancellationToken token, Action<QueryResult> action)
    {
        var result = new CoreTable();
        result.LoadColumns(columns);
        if(sort is null)
        {
            result.LoadRows(Items);
        }
        else
        {
            result.LoadRows(OrderItems(Items, sort));
        }
        action.Invoke(new(result));
    }

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