using AutoMapper;
using gehGassi.Common.Data;
using gehGassi.Core.Interfaces;
using gehGassi.Core.Services;
using gehGassi.Domain.Common;
using gehGassi.Permissions;
using gehGassi.Web.Auth;
using gehGassi.Web.Auth.Attributes;
using gehGassi.Web.Helper;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Localization;
using System.Collections.Generic;
using System.Linq;
using gehGassi.Web.Models;
using System.Threading.Tasks;
using System;
using gehGassi.Domain.Messages;
using gehGassi.External.Services;
using NetTopologySuite.Geometries;
using NetTopologySuite;
using System.IO;

namespace gehGassi.Web.Controllers
{
    /// <summary>
    /// Controller für die Verwaltung von Systemnachrichten
    /// </summary>
    public class SystemMessageController : BaseController
    {
        private readonly IMapper _mapper;
        private readonly IStringLocalizer<SystemMessageController> _localizer;
        private readonly ISystemMessageService _systemMessageService;
        private readonly ICountryService _countryService;
        private readonly IAppUserService _appUserService;
        private readonly IPushNotificationService _pushNotificationService;

        /// <summary>
        /// Erstellt eine Instanz
        /// </summary>
        /// <param name="mapper">Instanz eines IMapper</param>
        /// <param name="localizer">Instanz eines IStringLocalizer</param>
        /// <param name="systemMessageService">Instanz eines ISystemMessageService</param>
        /// <param name="countryService">Instanz eines ICountryService</param>
        /// <param name="appUserService">Instanz eines IAppUserService</param>
        /// <param name="pushNotificationService">Instanz eines IPushNotificationService</param>
        public SystemMessageController(IMapper mapper, IStringLocalizer<SystemMessageController> localizer, ISystemMessageService systemMessageService, ICountryService countryService, IAppUserService appUserService, 
            IPushNotificationService pushNotificationService)
        {
            _mapper = mapper;
            _localizer = localizer;
            _systemMessageService = systemMessageService;
            _countryService = countryService;
            _appUserService = appUserService;
            _pushNotificationService = pushNotificationService;
        }

        /// <summary>
        /// Gibt einen View für die Systemnachrichten-Verwaltung zurück
        /// </summary>
        /// <returns>View</returns>
        [Authorize(Policy = Policies.PowerUserOnly)]
        [HasPermission(Permission.AppUsersManage, Permission.AppUsersSystemMessages)]
        public IActionResult Index()
        {
            return View();
        }

        /// <summary>
        /// Gibt eine Liste von Entitäten basierend auf Abfragekriterien zurück
        /// </summary>
        /// <param name="dm">Abfragekriterien</param>
        /// <returns>Liste von gefundenen Entitäten</returns>
        [Authorize(Policy = Policies.PowerUserOnly)]
        [HasPermission(Permission.AppUsersManage, Permission.AppUsersSystemMessages)]
        [HttpPost]
        [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
        public IActionResult GetSystemMessages([FromBody] DataManager dm)
        {
            if (dm != null)
            {
                var propList = new List<ComplexProperty>();
                dm.SetComplexProperties(propList);

                if (dm.Where != null)
                {
                    foreach (var whereFilter in dm.Where)
                    {
                        if (whereFilter.predicates == null)
                            continue;
                        foreach (var whereFilterPredicate in whereFilter.predicates)
                        {
                            if (whereFilterPredicate.Field == "sex")
                                whereFilterPredicate.value = (Sex)((int)((long)whereFilterPredicate.value));
                        }
                    }
                }
            }

            var resultList = _systemMessageService.FilterSystemMessagesToSend(dm?.SearchValue ?? "");

            //Sortierung
            resultList = dm.ApplySorting(resultList);
            //Filter
            resultList = dm.ApplyFiltering(resultList, out var countFiltered);
            //Paging
            resultList = dm.ApplyPaging(resultList);

            var resultListVm = resultList.ToList().Select(item => _mapper.Map<SystemMessageToSendListVm>(item)).ToList();

            foreach (var itemVm in resultListVm)
            {
                itemVm.SexText = itemVm.Sex.GetDisplayName(AnnotationsLocalizer);
                itemVm.AppUserTypeText = itemVm.AppUserType.GetDisplayName(AnnotationsLocalizer);
            }

            //FilterPreview?
            if (!dm.RequiresCounts)
                return Json(resultListVm);

            return Json(new { result = resultListVm, count = countFiltered });
        }

        /// <summary>
        /// Anlegen einer Systemnachricht
        /// </summary>
        /// <returns>PartialView</returns>
        [Authorize(Policy = Policies.PowerUserOnly)]
        [HasPermission(Permission.AppUsersManage, Permission.AppUsersSystemMessages)]
        [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
        public async Task<IActionResult> Create()
        {
            var model = new SystemMessageToSendCrudVm()
            {
                AppUserType = AppUserTypeVm.Both,
                Sex = SexVm.Undefined,
                VerifiedOnly = false,
                CountryName = _localizer["Common_All"],
                StateName = _localizer["Common_All"],
            };

            return PartialView("_Create", model);
        }

        /// <summary>
        /// Anlegen einer Systemnachricht
        /// </summary>
        /// <param name="model">Model</param>
        /// <returns>Json</returns>
        [Authorize(Policy = Policies.PowerUserOnly)]
        [HasPermission(Permission.AppUsersManage, Permission.AppUsersSystemMessages)]
        [ValidateAntiForgeryToken]
        [HttpPost]
        public async Task<IActionResult> Create(SystemMessageToSendCrudVm model)
        {
            var result = new ResponseVm { Success = false };

            if (ModelState.IsValid)
            {
                var item = _systemMessageService.CreateToSend();
                _mapper.Map(model, item);
                item.CreatedBy = User.Identity.Name;

                //Zählen wie viele Nachrichten verschickt werden sollen
                item.AppUserCount = await _appUserService.CountForSystemMessageAsync(new SystemMessageAppUserQuery(){AppUserType = item.AppUserType, City = item.City, Country = item.Country, Sex = item.Sex, State = item.State, VerifiedOnly = item.VerifiedOnly, Zip = item.Zip});

                _systemMessageService.AddToSend(item);
                await _systemMessageService.CommitAsync(User.Identity.Name);

                result.Data = item.ToCamelCaseJson();
                result.Success = true;
                result.Html = string.Empty;
                return Json(result);
            }

            ModelState.Remove("CountryName");
            var country = _countryService.GetCountry(model.Country);
            model.CountryName = country != null ? country.Name : _localizer["Common_All"].Value;

            ModelState.Remove("StateName");
            var state = _countryService.GetState(model.Country, model.State);
            model.StateName = state != null ? state.Name : _localizer["Common_All"].Value;

            result.Html = await PartialView("_Create", model).ToStringAsync(ControllerContext);
            return Json(result);
        }

        /// <summary>
        /// Bearbeiten einer Systemnachricht
        /// </summary>
        /// <param name="id">Id der Systemnachricht</param>
        /// <returns>PartialView</returns>
        [Authorize(Policy = Policies.PowerUserOnly)]
        [HasPermission(Permission.AppUsersManage, Permission.AppUsersSystemMessages)]
        [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
        public async Task<IActionResult> Edit(long id)
        {
            var item = await _systemMessageService.GetToSendAsync(id);
            if (item != null)
            {
                var model = _mapper.Map<SystemMessageToSendCrudVm>(item);

                var country = _countryService.GetCountry(item.Country);
                model.CountryName = country != null ? country.Name : _localizer["Common_All"].Value;

                var state = _countryService.GetState(item.Country, item.State);
                model.StateName = state != null ? state.Name : _localizer["Common_All"].Value;

                return PartialView("_Edit", model);
            }
            return PartialView("_Error");
        }

        /// <summary>
        /// Bearbeiten einer Systemnachricht
        /// </summary>
        /// <param name="model">Model</param>
        /// <returns>Json</returns>
        [Authorize(Policy = Policies.PowerUserOnly)]
        [HasPermission(Permission.AppUsersManage, Permission.AppUsersSystemMessages)]
        [ValidateAntiForgeryToken]
        [HttpPost]
        public async Task<IActionResult> Edit(SystemMessageToSendCrudVm model)
        {
            var result = new ResponseVm { Success = false };

            if (ModelState.IsValid)
            {
                var item = await _systemMessageService.GetToSendAsync(model.Id);

                _mapper.Map(model, item);

                //Zählen wie viele Nachrichten verschickt werden sollen
                item.AppUserCount = await _appUserService.CountForSystemMessageAsync(new SystemMessageAppUserQuery() { AppUserType = item.AppUserType, City = item.City, Country = item.Country, Sex = item.Sex, State = item.State, VerifiedOnly = item.VerifiedOnly, Zip = item.Zip });

                await _systemMessageService.CommitAsync(User.Identity.Name);

                result.Data = item.ToCamelCaseJson();
                result.Success = true;
                result.Html = string.Empty;
                return Json(new { result.Success, result.Html, result.Data });
            }

            ModelState.Remove("CountryName");
            var country = _countryService.GetCountry(model.Country);
            model.CountryName = country != null ? country.Name : _localizer["Common_All"].Value;

            ModelState.Remove("StateName");
            var state = _countryService.GetState(model.Country, model.State);
            model.StateName = state != null ? state.Name : _localizer["Common_All"].Value;

            result.Html = await PartialView("_Edit", model).ToStringAsync(ControllerContext);
            return Json(result);
        }

        /// <summary>
        /// Löschen von Systemnachrichten die zu senden sind
        /// </summary>
        /// <param name="ids">Liste Id der Entität</param>
        /// <returns>Json</returns>
        [Authorize(Policy = Policies.PowerUserOnly)]
        [HasPermission(Permission.AppUsersManage, Permission.AppUsersSystemMessages)]
        [HttpPost]
        public async Task<IActionResult> Delete(List<long> ids)
        {
            var batchErrorHeader = $"<p><strong>{_localizer["Common_BatchDelete_Failed"].Value}</strong></p>";
            var batchResult = new BatchResponseVm(batchErrorHeader) { Success = true };

            foreach (var id in ids)
            {
                var item = await _systemMessageService.GetToSendAsync(id);
                if (item != null)
                {
                    //await _customerService.ResetTypeAsync(item.Id); //Spezial zurücksetzen wenn nötig

                    var specialCount = 0;
                    if (specialCount == 0)
                    {
                        batchResult.BatchResponseList.Add(new BatchResponseItemVm() { Id = item.Id.ToString(), Name = item.Title, Success = true, NotFound = false, ErrorMessage = "" });

                        _systemMessageService.RemoveToSend(item);
                    }
                    else
                    {
                        if (specialCount != 0)
                        {
                            batchResult.Success = false;
                            batchResult.BatchResponseList.Add(new BatchResponseItemVm() { Id = id.ToString(), Name = item.Title, Success = false, NotFound = false, ErrorMessage = string.Format(_localizer["Common_BatchDelete_InUse"], $"<strong>{item.Title}</strong>", $"<strong>{specialCount}</strong>") + "<br/>" });
                        }
                    }
                }
                else
                {
                    batchResult.Success = false;
                    batchResult.BatchResponseList.Add(new BatchResponseItemVm() { Id = id.ToString(), Name = "", Success = false, NotFound = true, ErrorMessage = string.Format(_localizer["Common_BatchDelete_NotFound"], $"<strong>{id}</strong>") + "<br/>" });
                }
            }
            if (batchResult.BatchResponseList.Any(c => c.Success))
                await _systemMessageService.CommitAsync(User.Identity.Name);
            return Json(batchResult);
        }

        /// <summary>
        /// Senden von Systemnachrichten
        /// </summary>
        /// <param name="id">Id der Systemnachricht die gesendet werden soll</param>
        /// <returns>Json</returns>
        [Authorize(Policy = Policies.PowerUserOnly)]
        [HasPermission(Permission.AppUsersManage, Permission.AppUsersSystemMessages)]
        [HttpPost]
        public async Task<IActionResult> Send(long id)
        {
            var result = new ResponseVm { Success = false };

            var item = await _systemMessageService.GetToSendAsync(id);
            if (item != null && item.HasBeenSent == false)
            {
                item.AppUserCount = await _appUserService.CountForSystemMessageAsync(new SystemMessageAppUserQuery() { AppUserType = item.AppUserType, City = item.City, Country = item.Country, Sex = item.Sex, State = item.State, VerifiedOnly = item.VerifiedOnly, Zip = item.Zip });
                item.SentCount = item.AppUserCount;
                item.HasBeenSent = true;
                item.SentDate = DateTimeOffset.UtcNow;
                item.SentBy = User.Identity.Name;

                await _systemMessageService.CommitAsync(User.Identity.Name);

                var appUsers = await _appUserService.GetForSystemMessageAsync(new SystemMessageAppUserQuery() { AppUserType = item.AppUserType, City = item.City, Country = item.Country, Sex = item.Sex, State = item.State, VerifiedOnly = item.VerifiedOnly, Zip = item.Zip });
                var sentCount = 0;
                foreach (var appUser in appUsers)
                {
                    sentCount += 1;
                    _systemMessageService.Add(appUser.Id, appUser.Type, item.Id.ToString(), DateTimeOffset.UtcNow.AddDays(14), item.Message);
                    if (item.SendPushNotification)
                    {
                        await _pushNotificationService.SendNewTextMessageAsync(appUser.Id, item.Id.ToString());
                    }
                }

                if (sentCount > 0)
                {
                    await _systemMessageService.CommitAsync(User.Identity.Name);
                }

                result.Success = true;
                return Json(result);
            }

            return Json(result);
        }
    }
}