using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.AspNetCore.SignalR;
using Microsoft.EntityFrameworkCore.Query;
using xDataService.Configuration;
using xDataService.Interfaces;
using xIdentityService.Interfaces;
using xModels.Base;
using xModels.Dtos;
using xPushService.Base;

namespace xPushService.Interfaces
{
    /// <summary>
    /// a Provider is a way to Manipulate Data using Repository or Services and Contains Push 
    /// notifications ability ...
    /// </summary>
    /// <typeparam name="TEntity"></typeparam>
    /// <typeparam name="TKey"></typeparam>
    public interface IXBaseEntityProvider<TEntity, TKey, THub>
    where TEntity : XBaseEntity<TKey>
    where THub : XBaseEntityHub<TEntity, TKey>
    {
        //
        #region Props ...
        IHubContext<THub> Hub { get; }
        IXIdentityProvider IdentityProvider { get; }
        IXBaseRepository<TEntity, TKey> Repository { get; }
        XDataServiceConfiguration DataConfiguration { get; }
        #endregion

        //
        #region Actions ...
        /// <summary>
        /// add a new Item ...
        /// </summary>
        /// <param name="item"></param>
        /// <param name="saveChanges"></param>
        /// <param name="connectionId"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        Task<TEntity> AddAsync(
            TEntity item,
            bool saveChanges = true,
            string connectionId = null,
            CancellationToken cancellationToken = default
        );

        /// <summary>
        /// Update an Item values ...
        /// </summary>
        /// <param name="id"></param>
        /// <param name="item"></param>
        /// <param name="saveChanges"></param>
        /// <param name="connectionId"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        Task<TEntity> UpdateAsync(
            TKey id,
            TEntity item,
            bool saveChanges = true,
            string connectionId = null,
            CancellationToken cancellationToken = default
        );

        /// <summary>
        /// remove an Item by it's Id ...
        /// </summary>
        /// <param name="id"></param>
        /// <param name="softDelete"></param>
        /// <param name="saveChanges"></param>
        /// <param name="connectionId"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        Task<TEntity> RemoveAsync(
            TKey id,
            bool softDelete = true,
            bool saveChanges = true,
            string connectionId = null,
            CancellationToken cancellationToken = default
        );

        /// <summary>
        /// count all exists Items ...
        /// </summary>
        /// <param name="ignoreSoftDeleteds"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        Task<int> CountAsync(
            bool ignoreSoftDeleteds = true,
            CancellationToken cancellationToken = default
        );

        /// <summary>
        /// Check an Item exists or not ...
        /// </summary>
        /// <param name="id"></param>
        /// <param name="ignoreSoftDeleteds"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        Task<bool> IsExistsAsync(
            TKey id,
            bool ignoreSoftDeleteds = true,
            CancellationToken cancellationToken = default
        );

        /// <summary>
        /// retrieve an Item by it's Id ...
        /// </summary>
        /// <param name="id"></param>
        /// <param name="ignoreSoftDeleteds"></param>
        /// <param name="includeBuilder"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        Task<TEntity> GetAsync(
            TKey id,
            bool ignoreSoftDeleteds = true,
            Func<IQueryable<TEntity>, IIncludableQueryable<TEntity, object>> includeBuilder = null,
            CancellationToken cancellationToken = default
        );

        /// <summary>
        /// retrieve all exists Items ...
        /// </summary>
        /// <param name="ignoreSoftDeleteds"></param>
        /// <param name="orderBuilder"></param>
        /// <param name="includeBuilder"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        Task<IEnumerable<TEntity>> GetAllAsync(
            bool ignoreSoftDeleteds = true,
            Func<IQueryable<TEntity>, IOrderedQueryable<TEntity>> orderBuilder = null,
            Func<IQueryable<TEntity>, IIncludableQueryable<TEntity, object>> includeBuilder = null,
            CancellationToken cancellationToken = default
        );

        /// <summary>
        /// find an Item by providing a Conditional Expression ...
        /// </summary>
        /// <param name="predicate"></param>
        /// <param name="ignoreSoftDeleteds"></param>
        /// <param name="includeBuilder"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        Task<TEntity> FindOneAsync(
            Expression<Func<TEntity, bool>> predicate,
            bool ignoreSoftDeleteds = true,
            Func<IQueryable<TEntity>, IIncludableQueryable<TEntity, object>> includeBuilder = null,
            CancellationToken cancellationToken = default
        );

        /// <summary>
        /// find a collection of Items by proving a Conditional Expression ...
        /// </summary>
        /// <param name="predicate"></param>
        /// <param name="ignoreSoftDeleteds"></param>
        /// <param name="orderBuilder"></param>
        /// <param name="includeBuilder"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        Task<IEnumerable<TEntity>> FindManyAsync(
            Expression<Func<TEntity, bool>> predicate,
            bool ignoreSoftDeleteds = true,
            Func<IQueryable<TEntity>, IOrderedQueryable<TEntity>> orderBuilder = null,
            Func<IQueryable<TEntity>, IIncludableQueryable<TEntity, object>> includeBuilder = null,
            CancellationToken cancellationToken = default
        );

        /// <summary>
        /// retrieve Items based on XQuery Pagination structure ...
        /// </summary>
        /// <param name="query"></param>
        /// <param name="ignoreSoftDeleteds"></param>
        /// <param name="predicate"></param>
        /// <param name="orderBuilder"></param>
        /// <param name="includeBuilder"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        Task<XQueryResult<TEntity>> QueryAsync(
            XQuery query,
            bool ignoreSoftDeleteds = true,
            Expression<Func<TEntity, bool>> predicate = null,
            Func<IQueryable<TEntity>, IOrderedQueryable<TEntity>> orderBuilder = null,
            Func<IQueryable<TEntity>, IIncludableQueryable<TEntity, object>> includeBuilder = null,
            CancellationToken cancellationToken = default
        );
        #endregion        

        //
        #region Hub Actions ...
        /// <summary>
        /// Send Custom Push Message ...
        /// </summary>
        /// <param name="action"></param>
        /// <param name="payLoad"></param>
        /// <param name="connectionId"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        Task SendPush(
            string action,
            string payLoad,
            string connectionId = null,
            CancellationToken cancellationToken = default
        );
        #endregion        
    }
}