using System.Text;
using System.Linq;
using System.Linq.Dynamic.Core;
using LCU.Library.Internal.DispatcherModels.Models;
using LCU.Library.Internal.DispatcherModels.Entities;
namespace LCU.Api.Internal.DispatcherLib.Extensions.Queryables;

public static class SortableFieldsQueryable
{
    public static IQueryable<Job> OrderBySortableFields(this IQueryable<Job> queryable, Filter filter)
    {
        if (filter?.SortableFields == null || !filter.SortableFields.Any())
        {
            return queryable;
        }

        var orderBy = new StringBuilder();
        foreach (var field in filter.SortableFields.OrderBy(sortableField => sortableField.Position))
        {
            var addedComma = orderBy.ToString() == "" ? "" : " ,";
            var desc = field.IsDescending ? " desc" : "";
            orderBy.Append($"{addedComma}{field.Field}{desc}");
        }

        return queryable.OrderBy(orderBy.ToString());
    }
}