using System;
using System.Linq;
using System.Collections.Generic;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Logging;
using xCommons.Configurations;
using xCommons.Extensions;
using xCommons.Providers;
using xExceptions.Constants;
using xIdentityService.Controllers;
using xIdentityService.Interfaces;
using xWebinarService.Interfaces;
using xWebinarService.Models.Dtos;
using Microsoft.AspNetCore.Http;
using XFileDto = xFileService.Models.Dtos.XFileDto;
using xModels.Dtos;

namespace xWebinarService.Controllers
{
    /// <summary>
    /// a Controller base Class which implement based Actions to Provides Webinar Provider Access ...
    /// </summary>
    public abstract class XWebinarServiceControllerBase : XIBaseProviderController, IXWebinarServiceControllerActions
    {
        //
        #region Props ...
        public IXWebinarProvider WebinarProvider { get; }
        #endregion

        //
        #region Constructor ...
        public XWebinarServiceControllerBase(
            ILogger logger,
            IXWebinarProvider webinarProvider,
            XAppConfiguration appConfiguration,
            IXIdentityProvider identityProvider,
            XValidationProvider validationProvider
        ) : base(
            logger,
            appConfiguration,
            identityProvider,
            validationProvider
        )
        {
            //
            WebinarProvider = webinarProvider;
        }
        #endregion

        //
        #region Actions ...
        /// <summary>
        /// Create Webinar ...
        /// </summary>
        /// <param name="item"></param>
        /// <param name="tags"></param>
        /// <param name="files"></param>
        /// <returns></returns>
        /// <summary>
        /// Create Webinar ...
        /// </summary>
        /// <param name="item"></param>
        /// <param name="tags"></param>
        /// <param name="files"></param>
        /// <returns></returns>
        [HttpPost("")]
        public virtual async Task<ActionResult<XWebinarDto>> CreateWebinar(
            [FromForm] XWebinarDto item,
            [FromQuery] string tags = null,
            [FromForm] IFormFileCollection files = null
        )
        {
            //
            // Do ...
            try
            {
                //
                // Retrieve User Info ...
                var userInfo = await GetUserInfo();
                var connectionId = GetConnectionId();
                bool isAdmin = userInfo.Roles.Any(r => r.ToNormalString() == "admin");
                var userId = userInfo.UserId;

                //
                // Check Owner ...
                if (item.OwnerId.IsNullOrEmpty())
                {
                    item.OwnerId = userId;
                }

                //
                var tagList = tags.ParseListString<string>();
                var result = await WebinarProvider
                    .CreateWebinar(
                        item: item,
                        files: files,
                        tags: tagList,
                        connectionId: connectionId
                );

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

        /// <summary>
        /// Update a Webinar  ...
        /// </summary>
        /// <param name="id"></param>
        /// <param name="item"></param>
        /// <returns></returns>
        [HttpPut("{id}")]
        public virtual async Task<ActionResult<XWebinarDto>> UpdateWebinar(
            [FromRoute] Guid id,
            [FromBody] XWebinarDto item
        )
        {
            //
            // Do ...
            try
            {
                //
                // Retrieve User Info ...
                var userInfo = await GetUserInfo();
                var connectionId = GetConnectionId();
                bool isAdmin = userInfo.Roles.Any(r => r.ToNormalString() == "admin");
                var userId = userInfo.UserId;

                //
                // Check Permission ...
                bool has = item.OwnerId == userId || isAdmin;
                if (!has)
                {
                    XException.NotAllowed.Throw();
                }

                //
                var result = await WebinarProvider
                    .UpdateWebinar(
                        item: item,
                        connectionId: connectionId
                );

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

        /// <summary>
        /// Retrieve Specified Webinar ...
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        [HttpGet("{id}")]
        public virtual async Task<ActionResult<XWebinarDto>> GetWebinar(
            [FromRoute] Guid id
        )
        {
            //
            // Do ...
            try
            {
                //
                var result = await WebinarProvider
                    .GetWebinar(id);

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

        /// <summary>
        /// Retrieve all Exists Webinars ...
        /// </summary>
        /// <returns></returns>
        [HttpGet("All")]
        public virtual async Task<ActionResult<IEnumerable<XWebinarDto>>> GetWebinars()
        {
            //
            // Do ...
            try
            {
                //
                var result = await WebinarProvider
                    .GetWebinars();

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

        /// <summary>
        /// Query Webinars ...
        /// </summary>
        /// <param name="query"></param>
        /// <returns></returns>
        [HttpGet("Query")]
        public virtual async Task<ActionResult<XQueryResult<XWebinarDto>>> QueryWebinars(
            [FromQuery] XQuery query
        )
        {
            //
            // Do ...
            try
            {
                //
                var result = await WebinarProvider
                    .QueryWebinars(query);

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

        /// <summary>
        /// Query Owned Webinars ...
        /// </summary>
        /// <param name="query"></param>
        /// <returns></returns>
        [HttpGet("Query/Owned")]
        public virtual async Task<ActionResult<XQueryResult<XWebinarDto>>> QueryOwnedWebinars(
            [FromQuery] XQuery query
        )
        {
            //
            // Do ...
            try
            {
                //
                // Retrieve User Info ...
                var userInfo = await GetUserInfo();

                //
                var result = await WebinarProvider
                    .QueryOwnedWebinars(
                        query: query,
                        userInfo: userInfo
                    );

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

        /// <summary>
        /// Query Joinable Webinars ...
        /// </summary>
        /// <param name="query"></param>
        /// <returns></returns>
        [HttpGet("Query/Joinable")]
        public virtual async Task<ActionResult<XQueryResult<XWebinarDto>>> QueryJoinableWebinars(
            [FromQuery] XQuery query
        )
        {
            //
            // Do ...
            try
            {
                //
                // Retrieve User Info ...
                var userInfo = await GetUserInfo();

                //
                var result = await WebinarProvider
                    .QueryJoinableWebinars(
                        query: query,
                        userInfo: userInfo
                    );

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

        /// <summary>
        /// Remove Specified Webinar ...
        /// </summary>
        /// <param name="webinarId"></param>
        /// <returns></returns>
        [HttpDelete("{id}")]
        public virtual async Task<ActionResult<bool>> RemoveWebinar(
            [FromRoute] Guid id
        )
        {
            //
            // Do ...
            try
            {
                //
                // Retrieve User Info ...
                var userInfo = await GetUserInfo();
                var connectionId = GetConnectionId();
                bool isAdmin = userInfo.Roles.Any(r => r.ToNormalString() == "admin");
                var userId = userInfo.UserId;

                //
                // Retrieve Entity ...
                var entity = await WebinarProvider.GetWebinar(id);
                bool has = !entity.IsNullOrDefault();
                if (!has)
                {
                    XException.NotFound.Throw();
                }

                //
                // Check Permissions ...
                has = entity.OwnerId == userId || isAdmin;
                if (!has)
                {
                    XException.NotAllowed.Throw();
                }

                //
                var result = await WebinarProvider
                    .RemoveWebinar(
                        webinarId: id,
                        connectionId: connectionId
                );

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

        //
        #region WebinarSubscriber ...
        /// <summary>
        /// Subscribe a User to Webinar ...
        /// </summary>
        /// <param name="id"></param>
        /// <param name="subscriberId"></param>
        /// <returns></returns>
        [HttpPost("{id}/Subscribe/{subscriberId}")]
        public virtual async Task<ActionResult<bool>> Subscribe(
            [FromRoute] Guid id,
            [FromRoute] string subscriberId
        )
        {
            //
            // Do ...
            try
            {
                //
                // Retrieve User Info ...
                var userInfo = await GetUserInfo();
                var connectionId = GetConnectionId();
                bool isAdmin = userInfo.Roles.Any(r => r.ToNormalString() == "admin");
                var userId = userInfo.UserId;

                //
                // Retrieve Entity ...
                var entity = await WebinarProvider.GetWebinar(id);
                bool has = !entity.IsNullOrDefault();
                if (!has)
                {
                    XException.NotFound.Throw();
                }

                //
                // Check Permissions ...
                has =
                    isAdmin ||
                    entity.OwnerId == userId ||
                    entity.Type == Constants.XWebinarType.Public;
                if (!has)
                {
                    XException.NotAllowed.Throw();
                }

                //
                var result = await WebinarProvider
                    .Subscribe(
                        webinarId: id,
                        subscriberId: subscriberId,
                        connectionId: connectionId
                );

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

        /// <summary>
        /// Check Specified User Subscribed on a Webinar or not ...
        /// </summary>
        /// <param name="id"></param>
        /// <param name="subscriberId"></param>
        /// <returns></returns>
        [HttpGet("{id}/IsSubscribed/{subscriberId}")]
        public virtual async Task<ActionResult<bool>> IsSubscribed(
            [FromRoute] Guid id,
            [FromRoute] string subscriberId
        )
        {
            //
            // Do ...
            try
            {
                //
                // Retrieve User Info ...
                var userInfo = await GetUserInfo();
                bool isAdmin = userInfo.Roles.Any(r => r.ToNormalString() == "admin");
                var userId = userInfo.UserId;

                //
                // Retrieve Entity ...
                var entity = await WebinarProvider.GetWebinar(id);
                bool has = !entity.IsNullOrDefault();
                if (!has)
                {
                    XException.NotFound.Throw();
                }

                //
                // Check Permissions ...
                has =
                    isAdmin ||
                    entity.OwnerId == userId;
                if (!has)
                {
                    XException.NotAllowed.Throw();
                }

                //
                var result = await WebinarProvider
                    .IsSubscribed(
                        webinarId: id,
                        subscriberId: subscriberId
                );

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

        /// <summary>
        /// Unsubscribe Specified User from a Specified Webinar ...
        /// </summary>
        /// <param name="id"></param>
        /// <param name="subscriberId"></param>
        /// <returns></returns>
        [HttpDelete("{id}/Unsubscribe/{subscriberId}")]
        public virtual async Task<ActionResult<bool>> Unsubscribe(
           [FromRoute] Guid id,
           [FromRoute] string subscriberId
        )
        {
            //
            // Do ...
            try
            {
                //
                // Retrieve User Info ...
                var userInfo = await GetUserInfo();
                var connectionId = GetConnectionId();
                bool isAdmin = userInfo.Roles.Any(r => r.ToNormalString() == "admin");
                var userId = userInfo.UserId;

                //
                // Retrieve Entity ...
                var entity = await WebinarProvider.GetWebinar(id);
                bool has = !entity.IsNullOrDefault();
                if (!has)
                {
                    XException.NotFound.Throw();
                }

                //
                // Check Permissions ...
                has =
                    isAdmin ||
                    subscriberId == userId ||
                    entity.OwnerId == userId;
                if (!has)
                {
                    XException.NotAllowed.Throw();
                }

                //
                var result = await WebinarProvider
                    .Unsubscribe(
                        webinarId: id,
                        subscriberId: subscriberId,
                        connectionId: connectionId
                );

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

        /// <summary>
        /// Retrieve Specified Subscriber ...
        /// </summary>
        /// <param name="id"></param>
        /// <param name="subscriberId"></param>
        /// <returns></returns>
        [HttpGet("{id}/Subscriber/{subscriberId}")]
        public virtual async Task<ActionResult<XWebinarSubscriberDto>> GetSubscriber(
            [FromRoute] Guid id,
            [FromRoute] string subscriberId
        )
        {
            //
            // Do ...
            try
            {
                //
                // Retrieve User Info ...
                var userInfo = await GetUserInfo();
                bool isAdmin = userInfo.Roles.Any(r => r.ToNormalString() == "admin");
                var userId = userInfo.UserId;

                //
                // Retrieve Entity ...
                var entity = await WebinarProvider.GetWebinar(id);
                bool has = !entity.IsNullOrDefault();
                if (!has)
                {
                    XException.NotFound.Throw();
                }

                //
                // Check Permissions ...
                has =
                    isAdmin ||
                    entity.OwnerId == userId;
                if (!has)
                {
                    XException.NotAllowed.Throw();
                }

                //
                var result = await WebinarProvider
                    .GetSubscriber(
                        webinarId: id,
                        subscriberId: subscriberId
                );

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

        /// <summary>
        /// Get all Specified Webinars Subscribers ...
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        [HttpGet("{id}/Subscribers")]
        public virtual async Task<ActionResult<IEnumerable<XWebinarSubscriberDto>>> GetSubscribers(
            [FromRoute] Guid id
        )
        {
            //
            // Do ...
            try
            {
                //
                // Retrieve User Info ...
                var userInfo = await GetUserInfo();
                bool isAdmin = userInfo.Roles.Any(r => r.ToNormalString() == "admin");
                var userId = userInfo.UserId;

                //
                // Retrieve Entity ...
                var entity = await WebinarProvider.GetWebinar(id);
                bool has = !entity.IsNullOrDefault();
                if (!has)
                {
                    XException.NotFound.Throw();
                }

                //
                // Check Permissions ...
                has =
                    isAdmin ||
                    entity.OwnerId == userId;
                if (!has)
                {
                    XException.NotAllowed.Throw();
                }

                //
                var result = await WebinarProvider
                    .GetSubscribers(id);

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

        /// <summary>
        /// Query Specified Webinar's Subscribers ...
        /// </summary>
        /// <param name="id"></param>
        /// <param name="query"></param>
        /// <returns></returns>
        [HttpGet("{id}/Subscribers/Query")]
        public virtual async Task<ActionResult<XQueryResult<XWebinarSubscriberDto>>> QuerySubscribers(
            [FromRoute] Guid id,
            [FromQuery] XQuery query
        )
        {
            //
            // Do ...
            try
            {
                //
                // Retrieve User Info ...
                var userInfo = await GetUserInfo();
                bool isAdmin = userInfo.Roles.Any(r => r.ToNormalString() == "admin");
                var userId = userInfo.UserId;

                //
                // Retrieve Entity ...
                var entity = await WebinarProvider.GetWebinar(id);
                bool has = !entity.IsNullOrDefault();
                if (!has)
                {
                    XException.NotFound.Throw();
                }

                //
                // Check Permissions ...
                has =
                    isAdmin ||
                    entity.OwnerId == userId;
                if (!has)
                {
                    XException.NotAllowed.Throw();
                }

                //
                var result = await WebinarProvider
                    .QuerySubscribers(
                        query: query,
                        webinarId: id
                );

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

        //
        #region File Actions ...
        /// <summary>
        /// Upload Specified Files for Specified Webinar ...
        /// </summary>
        /// <param name="id"></param>
        /// <param name="files"></param>
        /// <returns></returns>
        [HttpPost("{id}/Files")]
        public virtual async Task<ActionResult<IEnumerable<XFileDto>>> UploadFiles(
            [FromRoute] Guid id,
            [FromForm] IFormFileCollection files
        )
        {
            //
            // Do ...
            try
            {
                //
                // Retrieve User Info ...
                var userInfo = await GetUserInfo();
                var connectionId = GetConnectionId();

                //
                var result = await WebinarProvider
                    .UploadFiles(
                        id: id,
                        files: files,
                        userInfo: userInfo,
                        connectionId: connectionId
                );

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

        /// <summary>
        /// Remove Specified (All) Files of Specified Webinar ...
        /// </summary>
        /// <param name="id"></param>
        /// <param name="ids"></param>
        /// <returns></returns>
        [HttpDelete("{id}/Files")]
        public virtual async Task<ActionResult<IEnumerable<XFileDto>>> RemoveFiles(
            [FromRoute] Guid id,
            [FromQuery] string ids = null
        )
        {
            //
            // Do ...
            try
            {
                //
                // Retrieve User Info ...
                var userInfo = await GetUserInfo();
                var connectionId = GetConnectionId();

                //
                var result = await WebinarProvider
                    .RemoveFiles(
                        id: id,
                        ids: ids,
                        userInfo: userInfo,
                        connectionId: connectionId
                );

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

        /// <summary>
        /// Retrieve Specified Webinar's Files ...
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        [HttpGet("{id}/Files")]
        public virtual async Task<ActionResult<IEnumerable<XFileDto>>> GetFiles(
            [FromRoute] Guid id
        )
        {
            //
            // Do ...
            try
            {
                //
                var result = await WebinarProvider
                    .GetFiles(id);

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

        /// <summary>
        /// Stream Specified File of Specified Webinar ...
        /// </summary>
        /// <param name="id"></param>
        /// <param name="fileId"></param>
        /// <returns></returns>
        [HttpGet("{id}/Files/{fileId}/Stream")]
        public virtual async Task<ActionResult> StreamFile(
            [FromRoute] Guid id,
            [FromRoute] Guid fileId
        )
        {
            //
            // Do ...
            try
            {
                //
                var result = await WebinarProvider
                    .StreamFile(
                        id: id,
                        fileId: fileId
                );

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

        /// <summary>
        /// Download Specified File of Specified Webinar ...
        /// </summary>
        /// <param name="id"></param>
        /// <param name="fileId"></param>
        /// <returns></returns>
        [HttpGet("{id}/Files/{fileId}/Download")]
        public virtual async Task<ActionResult> DownloadFile(
            [FromRoute] Guid id,
            [FromRoute] Guid fileId
        )
        {
            //
            // Do ...
            try
            {
                //
                var result = await WebinarProvider
                    .DownloadFile(
                        id: id,
                        fileId: fileId
                );

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

        //
        #region Tags Actions ...
        /// <summary>
        /// Attach Specified Tags To Specified Webinar ...
        /// </summary>
        /// <param name="id"></param>
        /// <param name="tags"></param>
        /// <returns></returns>
        [HttpPost("{id}/Tags")]
        public virtual async Task<ActionResult> AttachTags(
            [FromRoute] Guid id,
            [FromQuery] string tags
        )
        {
            //
            // Do ...
            try
            {
                //
                // Retrieve User Info ...
                var userInfo = await GetUserInfo();
                var connectionId = GetConnectionId();

                //
                var tagsList = tags.ParseListString<string>();
                await WebinarProvider
                    .AttachTags(
                        id: id,
                        tags: tagsList,
                        userInfo: userInfo,
                        connectionId: connectionId
                );

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

        /// <summary>
        /// Detach Specified Tags From Specified Webinar ...
        /// </summary>
        /// <param name="id"></param>
        /// <param name="tags"></param>
        /// <returns></returns>
        [HttpDelete("{id}/Tags")]
        public virtual async Task<ActionResult> DetachTags(
            [FromRoute] Guid id,
            [FromQuery] string tags
        )
        {
            //
            // Do ...
            try
            {
                //
                // Retrieve User Info ...
                var userInfo = await GetUserInfo();
                var connectionId = GetConnectionId();

                //
                var tagsList = tags.ParseListString<string>();
                await WebinarProvider
                    .DetachTags(
                        id: id,
                        tags: tagsList,
                        userInfo: userInfo,
                        connectionId: connectionId
                );

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

        /// <summary>
        /// Retrieve Specified Webinars Tags ...
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        [HttpGet("{id}/Tags")]
        public virtual async Task<ActionResult<IEnumerable<string>>> GetTags(
            [FromRoute] Guid id
        )
        {
            //
            // Do ...
            try
            {
                //
                // Retrieve User Info ...
                var userInfo = await GetUserInfo();

                //
                await WebinarProvider
                    .GetTags(
                        id: id,
                        userInfo: userInfo
                );

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