using System;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Routing;
using Microsoft.AspNetCore.Authorization;
using Microsoft.Extensions.Logging;
using AyaNova.Models;
using AyaNova.Api.ControllerHelpers;
using AyaNova.Biz;
using System.Linq;
using Microsoft.EntityFrameworkCore;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using AyaNova.Util;

namespace AyaNova.Api.Controllers
{
    [ApiController]
    [ApiVersion("8.0")]
    [Route("api/v{version:apiVersion}/notify")]
    [Produces("application/json")]
    [Authorize]
    public class NotifyController : ControllerBase
    {
        private readonly AyContext ct;
        private readonly ILogger<NotifyController> log;
        private readonly ApiServerState serverState;

        /// <summary>
        /// ctor
        /// </summary>
        /// <param name="dbcontext"></param>
        /// <param name="logger"></param>
        /// <param name="apiServerState"></param>  
        public NotifyController(AyContext dbcontext, ILogger<NotifyController> logger, ApiServerState apiServerState)
        {
            ct = dbcontext;
            log = logger;
            serverState = apiServerState;
        }

        /// <summary>
        /// Pre-login route to confirm server is available
        /// </summary>       
        /// <returns></returns>
        [AllowAnonymous]
        [HttpGet("hello")]
        public async Task<IActionResult> GetPreLoginPing()
        {
            bool showSampleLogins = false;
            if (AyaNova.Core.License.ActiveKey.Status == AyaNova.Core.License.AyaNovaLicenseKey.LicenseStatus.ActiveTrial)
                showSampleLogins = await AyaNova.Util.DbUtil.DBHasTrialUsersAsync(ct, log);

            bool suIsDefault = await UserBiz.SuperIsDefaultCredsAsync(ct);
            //confirm if there are logo's to show as well
            var logo = await ct.Logo.AsNoTracking().SingleOrDefaultAsync();

            bool HasLargeLogo = false;
            bool HasMediumLogo = false;
            bool HasSmallLogo = false;
            if (logo != null)
            {
                if (logo.Small != null) HasSmallLogo = true;
                if (logo.Medium != null) HasMediumLogo = true;
                if (logo.Large != null) HasLargeLogo = true;
            }
            //case 4205
            bool PPBuild = true;
#if (SUBSCRIPTION_BUILD)
                        PPBuild = false;
#endif

            return Ok(ApiOkResponse.Response(
                  new { eval = showSampleLogins, sudf = suIsDefault, ll = HasLargeLogo, ml = HasMediumLogo, sl = HasSmallLogo, lcr = AyaNova.Core.License.LicenseConsentRequired, pp = PPBuild }));
        }



        /// <summary>
        /// Get count of new notifications waiting
        /// </summary>       
        /// <returns></returns>        
        [HttpGet("new-count")]
        public async Task<IActionResult> GetNewCount()
        {
            var UserId = UserIdFromContext.Id(HttpContext.Items);
            if (serverState.IsClosed && UserId != 1)//bypass for superuser to fix fundamental problems
                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));

            return Ok(ApiOkResponse.Response(await ct.InAppNotification.CountAsync(z => z.UserId == UserId && z.Fetched == false)));
        }

        /// <summary>
        /// Get all in-app notifications
        /// </summary>       
        /// <returns></returns>        
        [HttpGet("app-notifications")]
        public async Task<IActionResult> GetAppNotifications()
        {
            if (serverState.IsClosed)
                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));
            var UserId = UserIdFromContext.Id(HttpContext.Items);
            var ret = await ct.InAppNotification.AsNoTracking().Where(z => z.UserId == UserId).OrderByDescending(z => z.Created).ToListAsync();
            await ct.Database.ExecuteSqlInterpolatedAsync($"update ainappnotification set fetched={true} where userid = {UserId}");
            return Ok(ApiOkResponse.Response(ret));
        }


        /// <summary>
        /// Delete app Notification
        /// </summary>
        /// <param name="id"></param>
        /// <returns>NoContent</returns>
        [HttpDelete("{id}")]
        public async Task<IActionResult> DeleteAppNotification([FromRoute] long id)
        {
            if (!serverState.IsOpen)
                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));
            if (!ModelState.IsValid)
                return BadRequest(new ApiErrorResponse(ModelState));
            var UserId = UserIdFromContext.Id(HttpContext.Items);
            var n = await ct.InAppNotification.FirstOrDefaultAsync(z => z.Id == id);
            if (n == null)
                return BadRequest(new ApiErrorResponse(ApiErrorCode.NOT_FOUND, "id"));
            if (n.UserId != UserId)
                return BadRequest(new ApiErrorResponse(ApiErrorCode.NOT_AUTHORIZED, null, "Can't delete notification for another user"));
            ct.InAppNotification.Remove(n);
            await ct.SaveChangesAsync();
            return NoContent();
        }


        /// <summary>
        /// Get Notify Event object list from queue
        /// </summary>     
        /// <returns>Notify Event objects awaiting delivery</returns>
        [HttpGet("queue")]
        public async Task<IActionResult> GetQueue()
        {
            if (serverState.IsClosed)
                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));

            if (!Authorized.HasReadFullRole(HttpContext.Items, AyaType.OpsNotificationSettings))
            {
                return StatusCode(403, new ApiNotAuthorizedResponse());
            }

            if (!ModelState.IsValid)
            {
                return BadRequest(new ApiErrorResponse(ModelState));
            }

            var ret = new List<NotifyEventQueueItem>();
            var NotifyEvents = await ct.NotifyEvent.AsNoTracking().ToListAsync();
            foreach (NotifyEvent ne in NotifyEvents)
            {
                var UserInfo = await ct.User.AsNoTracking().Where(x => x.Id == ne.UserId).Select(x => new { Active = x.Active, Name = x.Name }).FirstOrDefaultAsync();
                var Subscription = await ct.NotifySubscription.AsNoTracking().FirstOrDefaultAsync(x => x.Id == ne.NotifySubscriptionId);

                ret.Add(new NotifyEventQueueItem(ne.Id, ne.Created, ne.EventDate, (ne.EventDate + Subscription.AgeValue - Subscription.AdvanceNotice), ne.UserId, UserInfo.Name, ne.EventType, ne.AyaType, ne.Name));
            }

            return Ok(ApiOkResponse.Response(ret));
        }

        public record NotifyEventQueueItem(long Id, DateTime Created, DateTime EventDate, DateTime DeliverAfter, long UserId, string User, NotifyEventType EventType, AyaType AyaType, string Name);

        /// <summary>
        /// Delete pending notification event
        /// </summary>
        /// <param name="id"></param>
        /// <returns>NoContent</returns>
        [HttpDelete("notify-event/{id}")]
        public async Task<IActionResult> DeleteNotifyEvent([FromRoute] long id)
        {
            if (!serverState.IsOpen)
                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));
            if (!ModelState.IsValid)
                return BadRequest(new ApiErrorResponse(ModelState));
            if (!Authorized.HasDeleteRole(HttpContext.Items, AyaType.OpsNotificationSettings))
            {
                return StatusCode(403, new ApiNotAuthorizedResponse());
            }
            var n = await ct.NotifyEvent.FirstOrDefaultAsync(z => z.Id == id);
            if (n == null)
                return BadRequest(new ApiErrorResponse(ApiErrorCode.NOT_FOUND, "id"));
            ct.NotifyEvent.Remove(n);
            await ct.SaveChangesAsync();
            return NoContent();
        }



        /// <summary>
        /// Send direct message notification to selected users
        /// </summary>       
        /// <returns>NoContent on success or error</returns>        
        [HttpPost("direct-message")]
        public async Task<IActionResult> SendNotifyDirectMessage([FromBody] NotifyDirectMessage notifyDirectMessage)
        {
            if (serverState.IsClosed)
                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));

            if (!ModelState.IsValid)
                return BadRequest(new ApiErrorResponse(ModelState));


            foreach (long l in notifyDirectMessage.Users)
            {
                if (l != 0)
                    await NotifyEventHelper.AddGeneralNotifyEvent(
                        NotifyEventType.GeneralNotification, notifyDirectMessage.Message, UserNameFromContext.Name(HttpContext.Items), null, l
                        );
            }

            return NoContent();
        }

        public class NotifyDirectMessage
        {
            public NotifyDirectMessage()
            {
                Users = new List<long>();
            }
            [Required]
            public string Message { get; set; }

            [Required]
            public List<long> Users { get; set; }
        }

        /// <summary>
        /// Send direct SMTP message notification so single object / address
        /// Note: adds to queue, not instantly sent
        /// </summary>       
        /// <returns>NoContent on success or error</returns>        
        [HttpPost("direct-smtp")]
        public async Task<IActionResult> SendNotifySmtpDirectMessage([FromBody] NotifyDirectSMTP notifyDirectSMTP)
        {
            if (serverState.IsClosed)
                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));

            if (!ModelState.IsValid)
                return BadRequest(new ApiErrorResponse(ModelState));


            //validate

            if (string.IsNullOrWhiteSpace(notifyDirectSMTP.ToAddress))
            {
                //We need to fetch the address from the object type and id
                //if no id then can skip the rest here
                if (notifyDirectSMTP.ObjectId == 0)
                {
                    return BadRequest(new ApiErrorResponse(ApiErrorCode.VALIDATION_MISSING_PROPERTY, "ObjectId", "No address or object id specified, no where to send this"));
                }
                //get the address
                switch (notifyDirectSMTP.AType)
                {
                    case AyaType.NoType:
                        return BadRequest(new ApiErrorResponse(ApiErrorCode.VALIDATION_MISSING_PROPERTY, "ToAddress", "No address or object type and id specified no where to send this"));
                    case AyaType.Customer:
                        var CustomerInfo = await ct.Customer.AsNoTracking().Where(x => x.Id == notifyDirectSMTP.ObjectId).Select(x => new { x.Name, x.EmailAddress, x.Active }).FirstAsync();
                        if (string.IsNullOrWhiteSpace(CustomerInfo.EmailAddress))
                            return BadRequest(new ApiErrorResponse(ApiErrorCode.VALIDATION_MISSING_PROPERTY, "EmailAddress", $"Customer {CustomerInfo.Name} doesn't have an email address no where to send this"));
                        if (CustomerInfo.Active == false)
                            return BadRequest(new ApiErrorResponse(ApiErrorCode.INVALID_OPERATION, "Active", $"Customer {CustomerInfo.Name} is not active, only active customers can be emailed directly"));
                        notifyDirectSMTP.ToAddress = CustomerInfo.EmailAddress;
                        break;
                    default:
                        return BadRequest(new ApiErrorResponse(ApiErrorCode.INVALID_OPERATION, "AType", "Specified Type not supported for 'on request' smtp"));

                }
            }
            var UserId = UserIdFromContext.Id(HttpContext.Items);

            IMailer m = AyaNova.Util.ServiceProviderProvider.Mailer;
            try
            {
                if (!ServerGlobalOpsSettingsCache.Notify.SmtpDeliveryActive)
                {
                    await NotifyEventHelper.AddGeneralNotifyEvent(NotifyEventType.GeneralNotification,
                                                                  $"Email notifications are set to OFF at server, unable to send 'on request' type SMTP notification subject:{notifyDirectSMTP.Subject}",
                                                                  "Error",
                                                                  null,
                                                                  UserId);
                    log.LogInformation($"** WARNING: SMTP notification is currently set to Active=False; unable to send 'on request' type SMTP notification subject:{notifyDirectSMTP.Subject} **");

                }
                else
                    await m.SendEmailAsync(notifyDirectSMTP.ToAddress, "Test from Notification system", "This is a test to confirm notification system is working", ServerGlobalOpsSettingsCache.Notify);

            }
            catch (Exception ex)
            {
                await NotifyEventHelper.AddOpsProblemEvent("SMTP direct message failed", ex);
                return StatusCode(500, new ApiErrorResponse(ApiErrorCode.API_SERVER_ERROR, null, ExceptionUtil.ExtractAllExceptionMessages(ex)));
            }

            return NoContent();
        }

        public class NotifyDirectSMTP
        {
            public NotifyDirectSMTP()
            {

            }

            public long ObjectId { get; set; } = 0;
            public AyaType AType { get; set; } = AyaType.NoType;
            public string ToAddress { get; set; }
            public string Subject { get; set; }
            public string TextBody { get; set; }
            public string HTMLBody { get; set; }
        }

        //------------


    }//eoc
}//eons