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

namespace gehGassi.Web.Controllers
{
    /// <summary>
    /// Controller für die Verwaltung von Text-Seiten
    /// </summary>
    [Authorize]
    public class PageController : BaseController
    {
        private readonly IMapper _mapper;
        private readonly IStringLocalizer<ProductController> _localizer;
        private readonly ILanguageService _languageService;
        private readonly IPageService _pageService;
        private readonly IFaqService _faqService;
        private readonly ICoinsService _coinsService;
        private readonly IUserService _userService;
        private readonly IAppUserService _appUserService;
        private readonly IOptions<MinCoinsForPot> _minCoinsOptions;
        private readonly IOptions<CoinsOptions> _coinsOptions;

        /// <summary>
        /// Erstellt eine Instanz
        /// </summary>
        /// <param name="mapper">Instanz eines IMapper</param>
        /// <param name="localizer">Instanz eines IStringLocalizer</param>
        /// <param name="languageService">Instanz eines ILanguageService</param>
        /// <param name="pageService">Instanz eines IPageService</param>
        /// <param name="faqService">Instanz eines IFaqService</param>
        /// <param name="coinsService">Instanz eines ICoinsService</param>
        /// <param name="userService">Instanz eines IUserService</param>
        /// <param name="appUserService">Instanz eines IAppUserService</param>
        /// <param name="minCoinsOptions">MinCoinsForPot</param>
        /// <param name="coinsOptions">CoinsOptions</param>
        public PageController(IMapper mapper, IStringLocalizer<ProductController> localizer, ILanguageService languageService, IPageService pageService, IFaqService faqService, ICoinsService coinsService, 
            IUserService userService, IAppUserService appUserService, IOptions<MinCoinsForPot> minCoinsOptions, IOptions<CoinsOptions> coinsOptions)
        {
            _mapper = mapper;
            _localizer = localizer;
            _languageService = languageService;
            _pageService = pageService;
            _faqService = faqService;
            _coinsService = coinsService;
            _userService = userService;
            _appUserService = appUserService;
            _minCoinsOptions = minCoinsOptions;
            _coinsOptions = coinsOptions;
        }

        /// <summary>
        /// Gibt einen View für die Text-Seiten-Verwaltung zurück
        /// </summary>
        /// <returns>View</returns>
        [Authorize(Policy = Policies.PowerUserOnly)]
        [HasPermission(Permission.SettingsManage, Permission.SettingsPages)]
        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.SettingsManage, Permission.SettingsPages)]
        [HttpPost]
        [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
        public IActionResult GetPages([FromBody] DataManager dm)
        {
            if (dm != null)
            {
                var propList = new List<ComplexProperty>();
                dm.SetComplexProperties(propList);
            }

            var resultList = _pageService.FilterWithNames(dm?.SearchValue ?? "", SelectedLanguage, FallbackLanguage);

            //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<PageListVm>(item)).ToList();

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

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

        /// <summary>
        /// Anlegen eine Text-Seite
        /// </summary>
        /// <returns>PartialView</returns>
        [Authorize(Policy = Policies.PowerUserOnly)]
        [HasPermission(Permission.SettingsManage, Permission.SettingsPages)]
        [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
        public IActionResult Create()
        {
            var model = new PageVm()
            {
                TextVms = new List<PageTextVm>()
            };

            foreach (var language in _languageService.GetAllIso2())
            {
                model.TextVms.Add(new PageTextVm() { Id = model.Id, Language = language, Content = string.Empty});
            }

            return PartialView("_Create", model);
        }

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

            if (ModelState.IsValid)
            {
                var item = _pageService.Create();
                _mapper.Map(model, item);
                item.Code = item.Code.ToUpperInvariant();

                // Texte setzen
                foreach (var textVm in model.TextVms)
                {
                    item.Set("Content", textVm.Language, textVm.Content);
                }

                _pageService.Add(item);
                await _pageService.CommitAsync(User.Identity.Name);

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

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

        /// <summary>
        /// Bearbeiten einer text-Seite
        /// </summary>
        /// <param name="id">Id des Produktes</param>
        /// <returns>PartialView</returns>
        [Authorize(Policy = Policies.PowerUserOnly)]
        [HasPermission(Permission.SettingsManage, Permission.SettingsPages)]
        [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
        public async Task<IActionResult> Edit(int id)
        {
            var item = await _pageService.GetAsync(id);
            if (item != null)
            {
                var model = _mapper.Map<PageVm>(item);

                model.TextVms = new List<PageTextVm>();
                foreach (var language in _languageService.GetAllIso2())
                {
                    model.TextVms.Add(new PageTextVm()
                    {
                        Id = item.Id,
                        Language = language,
                        Content = item.Get("Content", language, true)
                    });
                }

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

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

            if (ModelState.IsValid)
            {
                var item = await _pageService.GetAsync(model.Id);

                _mapper.Map(model, item);
                item.Code = item.Code.ToUpperInvariant();

                //Texte setzen
                foreach (var textVm in model.TextVms)
                {
                    item.Set("Content", textVm.Language, textVm.Content);
                }

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

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

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

        /// <summary>
        /// Löschen einer Text-Seite
        /// </summary>
        /// <param name="ids">Liste Id der Entität</param>
        /// <returns>Json</returns>
        [Authorize(Policy = Policies.PowerUserOnly)]
        [HasPermission(Permission.SettingsManage, Permission.SettingsProductCategories)]
        [HttpPost]
        public async Task<IActionResult> Delete(List<int> 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 _pageService.GetAsync(id);
                if (item != null)
                {
                    var useCount = 0;
                    if (useCount == 0)
                    {
                        batchResult.BatchResponseList.Add(new BatchResponseItemVm() { Id = item.Id.ToString(), Name = item.Title, Success = true, NotFound = false, ErrorMessage = "" });

                        _pageService.Remove(item);
                    }
                    else
                    {
                        if (useCount != 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>{useCount}</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 _pageService.CommitAsync(User.Identity.Name);
            return Json(batchResult);
        }

        #region App

        /// <summary>
        /// Anzeigen der Text-Seite für die App
        /// </summary>
        /// <param name="code">Code der Seite</param>
        /// <param name="language">Gewünschte Sprache</param>
        /// <param name="dark">Darkmode?</param>
        /// <param name="faqType">Wenn FAQ welcher Typ?</param>
        /// <returns></returns>
        [AllowAnonymous]
        public async Task<IActionResult> Show(string code, string language, bool dark = false, FaqType faqType = FaqType.Both)
        {
            var page = await _pageService.GetwithNamesAsync(code, language, FallbackLanguage);
            if (page != null)
            {
                page.SetLanguage(language.ToUpperInvariant());
                ViewBag.DarkMode = dark;
                var model = _mapper.Map<PageViewVm>(page);

                if (code.ToUpper() == "FAQ" && !string.IsNullOrWhiteSpace(model.Content) && model.Content.Contains("[FAQ]"))
                {
                    var faqHtml = await _faqService.GenerateHtmlForPageAsync(language, FallbackLanguage, faqType);
                    model.Content = model.Content.Replace("[FAQ]", faqHtml);
                }

                return View(model);
            }

            return NotFound();
        }

        /// <summary>
        /// Anzeigen der Seite für die App für den Monatswettbewerb der Dogwalker
        /// </summary>
        /// <param name="year">Jahr</param>
        /// <param name="month">Monat</param>
        /// <param name="a">Id des AppUsers</param>
        /// <param name="dark">Darkmode?</param>
        /// <returns></returns>
        [AllowAnonymous]
        public async Task<IActionResult> ShowCompetitionMonthWalker(int? year, int? month, string a = "", bool dark = false)
        {
            year ??= DateTimeOffset.UtcNow.Year;
            month ??= DateTimeOffset.UtcNow.Month;

            ViewBag.DarkMode = dark;
            ViewBag.Year = year;
            ViewBag.Month = month;
            ViewBag.MinCoins = _minCoinsOptions.Value.DogWalkerMonthly;
            ViewBag.CoinsOptions = _coinsOptions.Value;
            
            var topList = await _coinsService.GetMonthlyTopAsync(10, AppUserType.DogWalker, year.Value, month.Value, _minCoinsOptions.Value.DogWalkerMonthly);

            if (!string.IsNullOrWhiteSpace(a))
            {
                var appUser = await _appUserService.GetAsync(a);
                if (appUser is { Type: AppUserType.DogWalker or AppUserType.Both })
                {
                    ViewBag.AppUser = appUser;
                    var myCoins = await _coinsService.GetOrCreateCoinsPerMonthAsync(appUser.Id, AppUserType.DogWalker, new DateTimeOffset(year.Value, month.Value, 1, 0, 0, 0, TimeSpan.Zero));
                    ViewBag.MyCoins = myCoins;
                }
            }

            return View(topList);
        }

        /// <summary>
        /// Anzeigen der Seite für die App für den Jahrewettbewerb der Hundebesitzer
        /// </summary>
        /// <param name="year">Jahr</param>
        /// <param name="a">Id des AppUsers</param>
        /// <param name="dark">Darkmode?</param>
        /// <returns></returns>
        [AllowAnonymous]
        public async Task<IActionResult> ShowCompetitionYearOwner(int? year, string a = "", bool dark = false)
        {
            year ??= DateTimeOffset.UtcNow.Year;

            ViewBag.DarkMode = dark;
            ViewBag.Year = year;
            ViewBag.MinCoins = _minCoinsOptions.Value.OwnerYearly;
            ViewBag.CoinsOptions = _coinsOptions.Value;

            var topList = await _coinsService.GetYearlyTopAsync(10, AppUserType.DogOwner, year.Value, _minCoinsOptions.Value.OwnerYearly);

            if (!string.IsNullOrWhiteSpace(a))
            {
                var appUser = await _appUserService.GetAsync(a);
                if (appUser is { Type: AppUserType.DogOwner or AppUserType.Both })
                {
                    ViewBag.AppUser = appUser;
                    var myCoins = await _coinsService.GetOrCreateCoinsPerYearAsync(appUser.Id, AppUserType.DogOwner, new DateTimeOffset(year.Value, 1, 1, 0, 0, 0, TimeSpan.Zero));
                    ViewBag.MyCoins = myCoins;
                }
            }

            return View(topList);
        }

        #endregion


        #region Helper

        /// <summary>
        /// Überprüft ob ein Code für eine Text-Seite noch verfügbar ist
        /// </summary>
        /// <returns>true wenn möglich, false sonst</returns>
        [HttpPost]
        public async Task<IActionResult> IsCodeAvailable(string code, int id)
        {
            return Json(await _pageService.IsCodeAvailableAsync(code, id));
        }

        #endregion
    }
}