using System;
using System.Collections.Generic;
using System.Linq.Expressions;
using System.Threading.Tasks;
using xModels.Base;

namespace xModels.Interfaces {
    public interface IXBaseStore<T, TKey> where T : XBaseStorableDto<TKey> {
        //
        #region Retrieve ...
        /// <summary>
        /// Retrieve all Exists Items ...
        /// </summary>
        /// <returns></returns>
        Task<IEnumerable<T>> GetAll ();

        /// <summary>
        /// Retrieve specific Item by key ...
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        Task<T> Get (TKey key);

        /// <summary>
        /// retrieve items based on specific condition ...
        /// </summary>
        /// <param name="condition"></param>
        /// <returns></returns>
        Task<IEnumerable<T>> FindMany (Expression<Func<T, bool>> condition);

        /// <summary>
        /// retrieve item based on specific condition ...
        /// </summary>
        /// <param name="condition"></param>
        /// <returns></returns>
        Task<T> FindOne (Expression<Func<T, bool>> condition);
        #endregion

        //
        #region Add ...
        /// <summary>
        /// add specific item to Store ...
        /// </summary>
        /// <param name="item"></param>
        /// <returns></returns>
        Task<bool> Add (T item);

        /// <summary>
        /// Add a Collection of Items on Store ...
        /// </summary>
        /// <param name="items"></param>
        /// <returns></returns>
        Task<bool> AddMany (XBaseRangeRequest<T> items);
        #endregion

        //
        #region Remove ...
        /// <summary>
        /// Remove an item from store ...
        /// </summary>
        /// <param name="item"></param>
        /// <returns></returns>
        Task<bool> Remove (T item);

        /// <summary>
        /// remove an item by it's Key ...
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        Task<bool> RemoveByKey (TKey key);
        
        /// <summary>
        /// remove a collection of items at once ...
        /// </summary>
        /// <param name="items"></param>
        /// <returns></returns>
        Task<bool> RemoveMany(XBaseRangeRequest<T> items);
        #endregion

        //
        #region Update ...
        /// <summary>
        /// Update Exists Item in store ...
        /// </summary>
        /// <param name="item"></param>
        /// <param name="propertyWhiteList"></param>
        /// <param name="propertyBlackList"></param>
        /// <param name="propertyValueProviders"></param>
        /// <param name="updateWithNullOrEmptyValues"></param>
        /// <returns></returns>
        Task<T> Update (
            T item,
            ICollection<string> propertyWhiteList = null,
            ICollection<string> propertyBlackList = null,
            ICollection<KeyValuePair<string, Func<T, object>>> propertyValueProviders = null,
            bool updateWithNullOrEmptyValues = false
        );

        /// <summary>
        /// Update a Collection of Exists Items ...
        /// </summary>
        /// <param name="items"></param>
        /// <param name="propertyWhiteList"></param>
        /// <param name="propertyBlackList"></param>
        /// <param name="propertyValueProviders"></param>
        /// <param name="updateWithNullOrEmptyValues"></param>
        /// <returns></returns>
        Task<bool> UpdateMany (
            XBaseRangeRequest<T> items,
            ICollection<string> propertyWhiteList = null,
            ICollection<string> propertyBlackList = null,
            ICollection<KeyValuePair<string, Func<T, object>>> propertyValueProviders = null,
            bool updateWithNullOrEmptyValues = false
        );
        #endregion

        //
        #region Exists ...
        /// <summary>
        /// retrieve item(s) exists based on specific condition ...
        /// </summary>
        /// <param name="condition"></param>
        /// <returns></returns>
        Task<bool> IsExists (Expression<Func<T, bool>> condition);

        /// <summary>
        /// is exists an item by providing it's key ...
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        Task<bool> IsExistsByKey (TKey key);
        #endregion

        //
        #region Count ...
        /// <summary>
        /// Count Exists items ...
        /// </summary>
        /// <returns></returns>
        Task<int> Count ();
        #endregion        
    }
}