using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore.Query;
using Microsoft.Extensions.Logging;
using xCommons.Configurations;
using xCommons.Extensions;
using xCommons.Providers;
using xDataService.Extensions;
using xExceptions.Constants;
using xIdentityService.Controllers;
using xIdentityService.Interfaces;
using xModels.Base;
using xModels.Dtos;
using xPushService.Base;
using xPushService.Interfaces;

namespace xPushService.Controllers
{
    public abstract class XBaseRepositoryProviderController<TEntity, TKey, THub> : XBaseIdentityApiV1Controller, IXBaseRepositoryProviderController<TEntity, TKey, THub>
    where TEntity : XBaseEntity<TKey>
    where THub : XBaseEntityHub<TEntity, TKey>
    {
        //
        #region Properties ...
        public IXBaseEntityProviderr<TEntity, TKey, THub> Provider { get; }
        public Func<IQueryable<TEntity>, IOrderedQueryable<TEntity>> DefaultOrderBuilder { get; }
        public Func<IQueryable<TEntity>, IIncludableQueryable<TEntity, object>> DefaultIncludeBuilder { get; }
        #endregion

        protected XBaseRepositoryProviderController(
            ILogger logger,
            XAppConfiguration appConfiguration,
            IXIdentityProvider identityProvider,
            XValidationProvider validationProvider,
            IXBaseEntityProviderr<TEntity, TKey, THub> provider,
            Func<IQueryable<TEntity>, IOrderedQueryable<TEntity>> defaultOrderBuilder,
            Func<IQueryable<TEntity>, IIncludableQueryable<TEntity, object>> defaultIncludeBuilder
        ) : base(
            logger: logger,
            appConfiguration: appConfiguration,
            identityProvider: identityProvider,
            validationProvider: validationProvider
        )
        {
            //
            Provider = provider;
            DefaultOrderBuilder = defaultOrderBuilder;
            DefaultIncludeBuilder = defaultIncludeBuilder;
        }

        //
        #region Actions ...
        /// <summary>
        /// add a new Item ...
        /// </summary>
        /// <param name="item"></param>
        /// <param name="saveChanges"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        [HttpPost]
        public virtual async Task<ActionResult<TEntity>> Add(
            [FromBody] TEntity item,
            [FromQuery] bool saveChanges = true,
            CancellationToken cancellationToken = default
        )
        {
            //
            try
            {
                //
                // Validate ...
                if (!ModelState.IsValid)
                {
                    XException.InvalidArgs.Throw();
                }
                ValidationProvider.NotNull(item);

                //
                var connectionId = GetConnectionId();

                //
                var result = await Provider.AddAsync(
                    item: item,
                    saveChanges: saveChanges,
                    connectionId: connectionId,
                    cancellationToken: cancellationToken
                );

                //
                return Ok(result.ToDynamicObject());
            }
            catch (Exception ex)
            {
                //
                var result = GetExceptionActionResult(ex);
                return result;
            }
        }

        /// <summary>
        /// Update an Item values ...
        /// </summary>
        /// <param name="id"></param>
        /// <param name="item"></param>
        /// <param name="saveChanges"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        [HttpPut("{id}")]
        public virtual async Task<ActionResult<TEntity>> Update(
            [FromRoute] TKey id,
            [FromBody] TEntity item,
            [FromQuery] bool saveChanges = true,
            CancellationToken cancellationToken = default
        )
        {
            //
            try
            {
                //
                // Validate ...
                if (!ModelState.IsValid)
                {
                    XException.InvalidArgs.Throw();
                }
                ValidationProvider.NotNull(item);

                //
                var connectionId = GetConnectionId();

                //
                var result = await Provider.UpdateAsync(
                    id: id,
                    item: item,
                    saveChanges: saveChanges,
                    connectionId: connectionId,
                    cancellationToken: cancellationToken
                );

                //
                return Ok(result.ToDynamicObject());
            }
            catch (Exception ex)
            {
                //
                var result = GetExceptionActionResult(ex);
                return result;
            }
        }

        /// <summary>
        /// remove an Item by it's Id ...
        /// </summary>
        /// <param name="id"></param>
        /// <param name="softDelete"></param>
        /// <param name="saveChanges"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        [HttpDelete("{id}")]
        public virtual async Task<ActionResult<TEntity>> Remove(
            [FromRoute] TKey id,
            [FromQuery] bool softDelete = true,
            [FromQuery] bool saveChanges = true,
            CancellationToken cancellationToken = default
        )
        {
            //
            try
            {
                //
                // Validate ...
                if (!ModelState.IsValid)
                {
                    XException.InvalidArgs.Throw();
                }

                //
                var connectionId = GetConnectionId();

                //
                var result = await Provider.RemoveAsync(
                    id: id,
                    softDelete: softDelete,
                    saveChanges: saveChanges,
                    connectionId: connectionId,
                    cancellationToken: cancellationToken
                );

                //
                return Ok(result.ToDynamicObject());
            }
            catch (Exception ex)
            {
                //
                var result = GetExceptionActionResult(ex);
                return result;
            }
        }

        /// <summary>
        /// Check an Item exists or not ...
        /// </summary>
        /// <param name="id"></param>
        /// <param name="ignoreSoftDeleteds"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        [HttpGet("{id}/[action]")]
        public virtual async Task<ActionResult<bool>> IsExists(
            [FromRoute] TKey id,
            [FromQuery] bool ignoreSoftDeleteds = true,
            CancellationToken cancellationToken = default
        )
        {
            //
            try
            {
                //
                // Validate ...
                if (!ModelState.IsValid)
                {
                    XException.InvalidArgs.Throw();
                }

                //
                var result = await Provider.IsExistsAsync(
                    id: id,
                    cancellationToken: cancellationToken,
                    ignoreSoftDeleteds: ignoreSoftDeleteds
                );

                //
                return Ok(result);
            }
            catch (Exception ex)
            {
                //
                var result = GetExceptionActionResult(ex);
                return result;
            }
        }

        /// <summary>
        /// count all exists Items ...
        /// </summary>
        /// <param name="ignoreSoftDeleteds"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        [HttpGet("Count")]
        public virtual async Task<ActionResult<long>> Count(
            [FromQuery] bool ignoreSoftDeleteds = true,
            CancellationToken cancellationToken = default
        )
        {
            //
            try
            {
                //
                // Validate ...
                if (!ModelState.IsValid)
                {
                    XException.InvalidArgs.Throw();
                }

                //
                var result = await Provider.CountAsync(
                    cancellationToken: cancellationToken,
                    ignoreSoftDeleteds: ignoreSoftDeleteds
                );

                //
                return Ok(result);
            }
            catch (Exception ex)
            {
                //
                var result = GetExceptionActionResult(ex);
                return result;
            }
        }

        /// <summary>
        /// retrieve an Item by it's Id ...
        /// </summary>
        /// <param name="id"></param>
        /// <param name="ignoreSoftDeleteds"></param>
        /// <param name="useDefaultIncludes"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        [HttpGet("{id}")]
        public virtual async Task<ActionResult<TEntity>> Get(
            [FromRoute] TKey id,
            [FromQuery] bool ignoreSoftDeleteds = true,
            [FromQuery] bool useDefaultIncludes = false,
            CancellationToken cancellationToken = default
        )
        {
            //
            try
            {
                //
                // Validate ...
                if (!ModelState.IsValid)
                {
                    XException.InvalidArgs.Throw();
                }

                //
                var result = await Provider.GetAsync(
                    id: id,
                    includeBuilder: !useDefaultIncludes
                        ? null
                        : DefaultIncludeBuilder,
                    cancellationToken: cancellationToken,
                    ignoreSoftDeleteds: ignoreSoftDeleteds
                );

                //
                return Ok(result.ToDynamicObject());
            }
            catch (Exception ex)
            {
                //
                var result = GetExceptionActionResult(ex);
                return result;
            }
        }

        /// <summary>
        /// retrieve all exists Items ...
        /// </summary>
        /// <param name="ignoreSoftDeleteds"></param>
        /// <param name="useDefaultOrders"></param>
        /// <param name="useDefaultIncludes"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        [HttpGet]
        public virtual async Task<ActionResult<IEnumerable<TEntity>>> GetAll(
            [FromQuery] bool ignoreSoftDeleteds = true,
            [FromQuery] bool useDefaultOrders = false,
            [FromQuery] bool useDefaultIncludes = false,
            CancellationToken cancellationToken = default
        )
        {
            //
            try
            {
                //
                // Validate ...
                if (!ModelState.IsValid)
                {
                    XException.InvalidArgs.Throw();
                }

                //
                var result = await Provider.GetAllAsync(
                    orderBuilder: !useDefaultOrders
                        ? null
                        : DefaultOrderBuilder,
                    includeBuilder: !useDefaultIncludes
                        ? null
                        : DefaultIncludeBuilder,
                    cancellationToken: cancellationToken,
                    ignoreSoftDeleteds: ignoreSoftDeleteds
                );

                //
                return Ok(result.ToDynamicObject());
            }
            catch (Exception ex)
            {
                //
                var result = GetExceptionActionResult(ex);
                return result;
            }
        }

        /// <summary>
        /// find an Item by providing a Conditional Expression ...
        /// </summary>
        /// <param name="query"></param>
        /// <param name="ignoreSoftDeleteds"></param>
        /// <param name="useDefaultIncludes"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        [HttpGet("FindOne")]
        public virtual async Task<ActionResult<TEntity>> FindOne(
            [FromRoute] string query,
            [FromQuery] bool ignoreSoftDeleteds = true,
            [FromQuery] bool useDefaultIncludes = false,
            CancellationToken cancellationToken = default
        )
        {
            //
            try
            {
                //
                if (!ModelState.IsValid)
                {
                    XException.InvalidArgs.Throw();
                }
                ValidationProvider.NotEmpty(query);

                //
                Expression<Func<TEntity, bool>> predicate = x => x.PropValuesContains(query);
                var result = await Provider.FindOneAsync(
                    predicate: predicate,
                    includeBuilder: !useDefaultIncludes
                        ? null
                        : DefaultIncludeBuilder,
                    cancellationToken: cancellationToken,
                    ignoreSoftDeleteds: ignoreSoftDeleteds
                );

                //
                return Ok(result.ToDynamicObject());
            }
            catch (Exception ex)
            {
                //
                var result = GetExceptionActionResult(ex);
                return result;
            }
        }

        /// <summary>
        /// find a collection of Items by proving a Conditional Expression ...
        /// </summary>
        /// <param name="query"></param>
        /// <param name="ignoreSoftDeleteds"></param>
        /// <param name="useDefaultOrders"></param>
        /// <param name="useDefaultIncludes"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        [HttpGet("FindMany")]
        public virtual async Task<ActionResult<IEnumerable<TEntity>>> FindMany(
            [FromRoute] string query,
            [FromQuery] bool ignoreSoftDeleteds = true,
            [FromQuery] bool useDefaultOrders = false,
            [FromQuery] bool useDefaultIncludes = false,
            CancellationToken cancellationToken = default
        )
        {
            //
            try
            {
                //
                if (!ModelState.IsValid)
                {
                    XException.InvalidArgs.Throw();
                }
                ValidationProvider.NotEmpty(query);

                //
                Expression<Func<TEntity, bool>> predicate = x => x.PropValuesContains(query);
                var result = await Provider.FindManyAsync(
                    predicate: predicate,
                    orderBuilder: !useDefaultOrders
                        ? null
                        : DefaultOrderBuilder,
                    includeBuilder: !useDefaultIncludes
                        ? null
                        : DefaultIncludeBuilder,
                    cancellationToken: cancellationToken,
                    ignoreSoftDeleteds: ignoreSoftDeleteds
                );

                //
                return Ok(result.ToDynamicObject());
            }
            catch (Exception ex)
            {
                //
                var result = GetExceptionActionResult(ex);
                return result;
            }
        }

        /// <summary>
        /// retrieve Items based on XQuery Pagination structure ...
        /// </summary>
        /// <param name="query"></param>
        /// <param name="ignoreSoftDeleteds"></param>
        /// <param name="useDefaultOrders"></param>
        /// <param name="useDefaultIncludes"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        [HttpGet("Query")]
        public virtual async Task<ActionResult<XQueryResult<TEntity>>> Query(
            [FromQuery] XQuery query,
            [FromQuery] bool ignoreSoftDeleteds = true,
            [FromQuery] bool useDefaultOrders = false,
            [FromQuery] bool useDefaultIncludes = false,
            CancellationToken cancellationToken = default
        )
        {
            //
            try
            {
                //
                // Validate ...
                if (!ModelState.IsValid)
                {
                    XException.InvalidArgs.Throw();
                }

                //
                // Normalize ...
                if (query.IsNullOrDefault())
                {
                    query = query.NormalizeQuery(Provider.DataConfiguration);
                }

                //
                var result = await Provider.QueryAsync(
                    query: query,
                    predicate: null,
                    orderBuilder: !useDefaultOrders
                        ? null
                        : DefaultOrderBuilder,
                    includeBuilder: !useDefaultIncludes
                        ? null
                        : DefaultIncludeBuilder,
                    cancellationToken: cancellationToken,
                    ignoreSoftDeleteds: ignoreSoftDeleteds
                );

                //
                return Ok(result.ToDynamicObject());
            }
            catch (Exception ex)
            {
                //
                var result = GetExceptionActionResult(ex);
                return result;
            }
        }
        #endregion

        //
        #region NonActions ...
        /// <summary>
        /// Send Custom Push Message ...
        /// </summary>
        /// <param name="action"></param>
        /// <param name="payLoad"></param>
        /// <param name="connectionId"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        [NonAction]
        public virtual async Task SendPush(
            string action,
            string payLoad,
            string connectionId = null,
            CancellationToken cancellationToken = default
        )
        {
            //
            await Provider.SendPush(
                action: action,
                payLoad: payLoad,
                connectionId: connectionId,
                cancellationToken: cancellationToken
            );
        }
        #endregion
    }
}