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 xModels.Dtos;
using xWebinarService.Interfaces;
using xWebinarService.Models.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>
        /// <returns></returns>
        [HttpPost("Create")]
        public virtual async Task<ActionResult<XWebinarDto>> CreateWebinar(
            [FromBody] XWebinarDto item
        )
        {
            //
            // Do ...
            try
            {
                //
                // Retrieve User Info ...
                var userInfo = await GetUserInfo();
                bool isAdmin = userInfo.Roles.Any(r => r.ToNormalString() == "admin");
                var userId = userInfo.UserId;

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

                //
                var result = await WebinarProvider
                    .CreateWebinar(item);

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

        /// <summary>
        /// Update a Webinar  ...
        /// </summary>
        /// <param name="item"></param>
        /// <returns></returns>
        [HttpPut("Update")]
        public virtual async Task<ActionResult<XWebinarDto>> UpdateWebinar(
            [FromBody] XWebinarDto item
        )
        {
            //
            // Do ...
            try
            {
                //
                // Retrieve User Info ...
                var userInfo = await GetUserInfo();
                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);

                //
                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("")]
        public virtual async Task<ActionResult<XWebinarDto>> GetWebinar(
            [FromQuery] 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>
        /// Retrieve all Exists Webinar Ids ...
        /// </summary>
        /// <returns></returns>
        [HttpGet("Ids")]
        public virtual ActionResult<IEnumerable<Guid>> GetWebinarIds()
        {
            //
            // Do ...
            try
            {
                //
                var result = WebinarProvider
                    .GetWebinarIds();

                //
                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 Webinar Ids ...
        /// </summary>
        /// <param name="query"></param>
        /// <returns></returns>
        [HttpGet("QueryIds")]
        public virtual ActionResult<XQueryResult<Guid>> QueryWebinarIds(
            [FromQuery] XQuery query
        )
        {
            //
            // Do ...
            try
            {
                //
                var result = WebinarProvider
                    .QueryWebinarIds(query);

                //
                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("Remove")]
        public virtual async Task<ActionResult<bool>> RemoveWebinar(
            [FromQuery] Guid webinarId
        )
        {
            //
            // 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(webinarId);
                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);

                //
                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="webinarId"></param>
        /// <param name="subscriberId"></param>
        /// <returns></returns>
        [HttpPost("Subscribe")]
        public virtual async Task<ActionResult<bool>> Subscribe(
            [FromQuery] Guid webinarId,
            [FromQuery] 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(webinarId);
                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: webinarId,
                        subscriberId: subscriberId
                );

                //
                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="webinarId"></param>
        /// <param name="subscriberId"></param>
        /// <returns></returns>
        [HttpGet("IsSubscribed")]
        public virtual async Task<ActionResult<bool>> IsSubscribed(
            [FromQuery] Guid webinarId,
            [FromQuery] 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(webinarId);
                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: webinarId,
                        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="webinarId"></param>
        /// <param name="subscriberId"></param>
        /// <returns></returns>
        [HttpDelete("Unsubscribe")]
        public virtual async Task<ActionResult<bool>> Unsubscribe(
           [FromQuery] Guid webinarId,
           [FromQuery] 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(webinarId);
                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: webinarId,
                        subscriberId: subscriberId
                );

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

        /// <summary>
        /// Retrieve Specified Subscriber ...
        /// </summary>
        /// <param name="webinarId"></param>
        /// <param name="subscriberId"></param>
        /// <returns></returns>
        [HttpGet("GetSubscriber")]
        public virtual async Task<ActionResult<XWebinarSubscriberDto>> GetSubscriber(
            [FromQuery] Guid webinarId,
            [FromQuery] 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(webinarId);
                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: webinarId,
                        subscriberId: subscriberId
                );

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

        /// <summary>
        /// Get all Specified Webinars Subscribers ...
        /// </summary>
        /// <param name="webinarId"></param>
        /// <returns></returns>
        [HttpGet("GetSubscribers")]
        public virtual async Task<ActionResult<IEnumerable<XWebinarSubscriberDto>>> GetSubscribers(
            [FromQuery] Guid webinarId
        )
        {
            //
            // 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(webinarId);
                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(webinarId);

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

        /// <summary>
        /// Query Specified Webinar's Subscribers ...
        /// </summary>
        /// <param name="webinarId"></param>
        /// <param name="query"></param>
        /// <returns></returns>
        [HttpGet("QuerySubscribers")]
        public virtual async Task<ActionResult<XQueryResult<XWebinarSubscriberDto>>> QuerySubscribers(
            [FromQuery] XQuery query,
            [FromQuery] Guid webinarId
        )
        {
            //
            // 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(webinarId);
                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: webinarId
                );

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