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

namespace xDataService.Controllers
{
    /// <summary>
    /// an Abstract Controller for Providing Entity Dto Repository Service Actions Implementatin ...
    /// </summary>
    /// <typeparam name="TEntity"></typeparam>
    /// <typeparam name="TDto"></typeparam>
    /// <typeparam name="TKey"></typeparam>
    [AllowAnonymous]
    public abstract class XBaseServiceController<TEntity, TDto, TKey> : XBaseApiV1Controller, IXBaseServiceController<TEntity, TDto, TKey>
    where TEntity : XBaseEntity<TKey>
    where TDto : XBaseEntityDto<TKey>
    {
        //
        #region Properties ...
        public IXBaseRepositoryService<TEntity, TDto, TKey> RepositoryService { get; }
        public Func<IQueryable<TEntity>, IOrderedQueryable<TEntity>> DefaultOrderBuilder { get; }
        public Func<IQueryable<TEntity>, IIncludableQueryable<TEntity, object>> DefaultIncludeBuilder { get; }
        #endregion

        //
        #region Constructor ...
        protected XBaseServiceController(
            ILogger<XBaseServiceController<TEntity, TDto, TKey>> logger,
            XAppConfiguration appConfiguration,
            XValidationProvider validationProvider,
            IXBaseRepositoryService<TEntity, TDto, TKey> repositoryService,
            Func<IQueryable<TEntity>, IOrderedQueryable<TEntity>> defaultOrderBuilder = null,
            Func<IQueryable<TEntity>, IIncludableQueryable<TEntity, object>> defaultIncludeBuilder = null
        ) : base(
            logger,
            appConfiguration,
            validationProvider
        )
        {
            //
            RepositoryService = repositoryService;
            DefaultOrderBuilder = defaultOrderBuilder;
            DefaultIncludeBuilder = defaultIncludeBuilder;
        }
        #endregion

        //
        #region Actions ...
        //
        #region Add ...
        /// <summary>
        /// Add Specified Item ...
        /// </summary>
        /// <remarks>
        /// </remarks>
        /// <param name="item"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        [HttpPost]
        public virtual async Task<ActionResult<TDto>> Add(
            [FromBody] TDto item,
            CancellationToken cancellationToken = default
        )
        {
            //
            try
            {
                //
                // Validate Args ...
                if (!ModelState.IsValid)
                {
                    XException.InvalidArgs.Throw();
                }
                ValidationProvider.NotNull(item);

                //
                // Get Result ...
                var result = await RepositoryService
                    .AddAsync(
                        item,
                        saveChanges: true,
                        cancellationToken: cancellationToken
                    );

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

        /// <summary>
        /// Add or Update Specified Item ... 
        /// </summary>
        /// <remarks>
        /// </remarks>
        /// <param name="item"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        [HttpPost("AddOrUpdate")]
        public virtual async Task<ActionResult<TDto>> AddOrUpdate(
            [FromBody] TDto item,
            CancellationToken cancellationToken = default
        )
        {
            //
            try
            {
                //
                // Validate Args ...
                if (!ModelState.IsValid)
                {
                    XException.InvalidArgs.Throw();
                }
                ValidationProvider.NotNull(item);

                //
                // Get Result ...
                var result = await RepositoryService
                    .AddOrUpdateAsync(
                        item,
                        saveChanges: true,
                        cancellationToken: cancellationToken
                    );

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

        /// <summary>
        /// Add a Collection of Items ...
        /// </summary>
        /// <remarks>
        /// </remarks>
        /// <param name="request"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        [HttpPost("AddMany")]
        public virtual async Task<ActionResult> AddMany(
            [FromBody] XBaseRangeRequest<TDto> request,
            CancellationToken cancellationToken = default
        )
        {
            //
            try
            {
                //
                // Validate Args ...
                if (!ModelState.IsValid)
                {
                    XException.InvalidArgs.Throw();
                }
                await ValidationProvider
                    .GroupValidationBuilder()
                    .AddNotNull(request)
                    .AddNotZeroChilds(request.Items)
                    .ValidateGroupAsync();

                //
                // Get Result ...
                await RepositoryService
                    .AddRangeAsync(
                        request.Items,
                        saveChanges: true,
                        cancellationToken: cancellationToken
                    );

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

        //
        #region Retrieve ...
        /// <summary>
        /// Get Specified Item ...
        /// </summary>
        /// <remarks>
        /// </remarks>
        /// <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<TDto>> Get(
            [FromRoute] TKey id,
            [FromQuery] bool ignoreSoftDeleteds = true,
            [FromQuery] bool useDefaultIncludes = false,
            CancellationToken cancellationToken = default
        )
        {
            //
            try
            {
                //
                // Validate Args ...
                ValidationProvider.NotNull(id);

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

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

        /// <summary>
        /// Get All Items ...
        /// </summary>
        /// <remarks>
        /// </remarks>
        /// <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<TDto>>> GetAll(
            [FromQuery] bool ignoreSoftDeleteds = true,
            [FromQuery] bool useDefaultOrders = false,
            [FromQuery] bool useDefaultIncludes = false,
            CancellationToken cancellationToken = default
        )
        {
            //
            try
            {
                //
                // Get Result ...
                var result = await RepositoryService
                    .GetAllAsync(
                        orderBuilder: useDefaultOrders
                            ? DefaultOrderBuilder
                            : null,
                        includeBuilder: useDefaultIncludes
                            ? DefaultIncludeBuilder
                            : null,
                        cancellationToken: cancellationToken,
                        ignoreSoftDeleteds: ignoreSoftDeleteds
                    );

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

        /// <summary>
        /// Find Specified Item ...
        /// </summary>
        /// <remarks>
        /// </remarks>
        /// <param name="query"></param>
        /// <param name="ignoreSoftDeleteds"></param>
        /// <param name="useDefaultIncludes"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        [HttpGet("FindOne/{query}")]
        public virtual async Task<ActionResult<TDto>> FindOne(
            [FromRoute] string query,
            [FromQuery] bool ignoreSoftDeleteds = true,
            [FromQuery] bool useDefaultIncludes = false,
            CancellationToken cancellationToken = default
        )
        {
            //
            try
            {
                //
                // Validate Args ...
                ValidationProvider.NotEmpty(query);

                //
                // Get Result ...
                var result = await RepositoryService
                    .FindOneAsync(
                        predicate: t =>
                            t.PropValuesContains(query),
                        includeBuilder: useDefaultIncludes
                            ? DefaultIncludeBuilder
                            : null,
                        cancellationToken: cancellationToken,
                        ignoreSoftDeleteds: ignoreSoftDeleteds
                    );

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

        /// <summary>
        /// Find Many Items ...
        /// </summary>
        /// <remarks>
        /// </remarks>
        /// <param name="query"></param>
        /// <param name="ignoreSoftDeleteds"></param>
        /// <param name="useDefaultOrders"></param>
        /// <param name="useDefaultIncludes"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        [HttpGet("FindMany/{query}")]
        public virtual async Task<ActionResult<IEnumerable<TDto>>> FindMany(
            [FromRoute] string query,
            [FromQuery] bool ignoreSoftDeleteds = true,
            [FromQuery] bool useDefaultOrders = false,
            [FromQuery] bool useDefaultIncludes = false,
            CancellationToken cancellationToken = default
        )
        {
            //
            try
            {
                //
                // Validate Args ...
                ValidationProvider.NotEmpty(query);

                //
                // Get Result ...
                var result = await RepositoryService
                    .FindManyAsync(
                        predicate: t =>
                            t.PropValuesContains(query),
                        orderBuilder: useDefaultOrders
                            ? DefaultOrderBuilder
                            : null,
                        includeBuilder: useDefaultIncludes
                            ? DefaultIncludeBuilder
                            : null,
                        cancellationToken: cancellationToken,
                        ignoreSoftDeleteds: ignoreSoftDeleteds
                    );

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

        /// <summary>
        /// Retrieve Items Based on Query Mechanism ...
        /// </summary>
        /// <remarks>
        /// </remarks>
        /// <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<TDto>>> Query(
            [FromQuery] XQuery query,
            [FromQuery] bool ignoreSoftDeleteds = true,
            [FromQuery] bool useDefaultOrders = false,
            [FromQuery] bool useDefaultIncludes = false,
            CancellationToken cancellationToken = default
        )
        {
            //
            try
            {
                //
                // Validate Args ...
                ValidationProvider.NotNull(query);

                //
                // Get Result ...
                var result = await RepositoryService
                    .QueryAsync(
                        query: query,
                        orderBuilder: useDefaultOrders
                            ? DefaultOrderBuilder
                            : null,
                        includeBuilder: useDefaultIncludes
                            ? DefaultIncludeBuilder
                            : null,
                        cancellationToken: cancellationToken,
                        ignoreSoftDeleteds: ignoreSoftDeleteds
                    );

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

        //
        #region Update ...
        /// <summary>
        /// Update Item ...
        /// </summary>
        /// <remarks>
        /// </remarks>
        /// <param name="id"></param>
        /// <param name="item"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        [HttpPut("{id}")]
        public virtual async Task<ActionResult<TDto>> Update(
            [FromRoute] TKey id,
            [FromBody] TDto item,
            CancellationToken cancellationToken = default
        )
        {
            //
            try
            {
                //
                // Validate Args ...
                if (!ModelState.IsValid)
                {
                    XException.InvalidArgs.Throw();
                }
                await ValidationProvider
                    .GroupValidationBuilder()
                    .AddNotNull(id, item)
                    .ValidateGroupAsync();

                //
                // Get Result ...
                var result = await RepositoryService
                    .UpdateAsync(
                        id: id,
                        item: item,
                        saveChanges: true,
                        cancellationToken: cancellationToken
                    );

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

        /// <summary>
        /// Update a Collection of items ... 
        /// </summary>
        /// <remarks>
        /// </remarks>
        /// <param name="request"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        [HttpPost("UpdateMany")]
        public virtual async Task<ActionResult<bool>> UpdateMany(
            [FromBody] XBaseRangeRequest<TDto> request,
            CancellationToken cancellationToken = default
        )
        {
            //
            try
            {
                //
                // Validate Args ...
                if (!ModelState.IsValid)
                {
                    XException.InvalidArgs.Throw();
                }
                await ValidationProvider
                    .GroupValidationBuilder()
                    .AddNotNull(request)
                    .AddNotZeroChilds(request.Items)
                    .ValidateGroupAsync();

                //
                // Get Result ...
                var result = await RepositoryService
                    .UpdateRangeAsync(
                        saveChanges: true,
                        items: request.Items,
                        cancellationToken: cancellationToken
                    );

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

        //
        #region Exists ...
        /// <summary>
        ///Check an Item Exists or not ... 
        /// </summary>
        /// <remarks>
        /// </remarks>
        /// <param name="id"></param>
        /// <param name="ignoreSoftDeleteds"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        [HttpGet("{id}/IsExists")]
        public virtual async Task<ActionResult<bool>> IsExists(
            [FromRoute] TKey id,
            [FromQuery] bool ignoreSoftDeleteds = true,
            CancellationToken cancellationToken = default
        )
        {
            //
            try
            {
                //
                // Validate Args ...
                ValidationProvider.NotNull(id);

                //
                // Get Result ...
                var result = await RepositoryService
                    .IsExistsAsync(
                        id: id,
                        cancellationToken: cancellationToken,
                        ignoreSoftDeleteds: ignoreSoftDeleteds
                    );

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

        //
        #region Remove ...
        /// <summary>
        /// Remove an Items ... 
        /// </summary>
        /// <remarks>
        /// </remarks>
        /// <param name="id"></param>
        /// <param name="softDelete"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        [HttpDelete("{id}")]
        public virtual async Task<ActionResult<TDto>> Remove(
            [FromRoute] TKey id,
            [FromQuery] bool softDelete = true,
            CancellationToken cancellationToken = default
        )
        {
            //
            try
            {
                //
                // Validate Args ...
                ValidationProvider.NotNull(id);

                //
                // Get Result ...
                var result = await RepositoryService
                    .RemoveAsync(
                        id: id,
                        saveChanges: true,
                        softDelete: softDelete,
                        cancellationToken: cancellationToken
                    );

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

        /// <summary>
        /// Remove Many Items ... 
        /// </summary>
        /// <remarks>
        /// </remarks>
        /// <param name="request"></param>
        /// <param name="softDelete"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        [HttpPost("RemoveMany")]
        public virtual async Task<ActionResult> RemoveMany(
            [FromBody] XBaseRangeRequest<TDto> request,
            [FromQuery] bool softDelete = true,
            CancellationToken cancellationToken = default
        )
        {
            //
            try
            {
                //
                // Validate Args ...
                await ValidationProvider
                    .GroupValidationBuilder()
                    .AddNotNull(request)
                    .AddNotZeroChilds(request.Items)
                    .ValidateGroupAsync();

                //
                // Get Result ...
                await RepositoryService
                    .RemoveRangeAsync(
                        saveChanges: true,
                        items: request.Items,
                        softDelete: softDelete,
                        cancellationToken: cancellationToken
                    );

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