using System;
using System.Linq;
using System.Linq.Expressions;
using GerstITS.Common;
using GerstITS.Data;

namespace GerstITS.Examples.Logic.Shared
{
    internal static class ISearchEngineExtensions
    {
        #region Methods

        public static TEntity QueryBy<TEntity>(this IReadOnlyRepository repository, Expression<Func<TEntity, bool>> condition)
            where TEntity : IEntity
        {
            return repository.Query<TEntity>()
                             .Where(condition)
                             .FirstOrDefault();
        }
        
        public static TModel ThrowsAnExceptionIfNotFound<TModel, TKey>(this TModel model, TKey id)
        {
            if (model.IsNull())
                throw new EntityNotFoundException($"{typeof(TModel).Name} with id '{id}' not found.");

            return model;
        }

        #endregion
    }
}