using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
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 gehGassi.Web.Models;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Localization;

namespace gehGassi.Web.Controllers
{
    /// <summary>
    /// Controller für die Verwaltung von Branchen
    /// </summary>
    [Authorize]
    public class BranchController : BaseController
    {
        private readonly IMapper _mapper;
        private readonly IStringLocalizer<BranchController> _localizer;
        private readonly IBranchService _branchService;
        private readonly ILanguageService _languageService;
        private readonly ICustomerService _customerService;
        private readonly IListingService _listingService;

        /// <summary>
        /// Erstellt eine Instanz
        /// </summary>
        /// <param name="mapper">Instanz eines IMapper</param>
        /// <param name="localizer">Instanz eines IStringLocalizer</param>
        /// <param name="branchService">Instanz eines IBranchService</param>
        /// <param name="languageService">Instanz eines ILanguageService</param>
        /// <param name="customerService">Instanz eines ICustomerService</param>
        /// <param name="listingService">Instanz eines IListingService</param>
        public BranchController(IMapper mapper, IStringLocalizer<BranchController> localizer, IBranchService branchService, ILanguageService languageService, ICustomerService customerService, 
            IListingService listingService)
        {
            _mapper = mapper;
            _localizer = localizer;
            _branchService = branchService;
            _languageService = languageService;
            _customerService = customerService;
            _listingService = listingService;
        }

        /// <summary>
        /// Gibt einen View für die Verwaltung von Branchen zurück
        /// </summary>
        /// <returns>View</returns>
        [Authorize(Policy = Policies.PowerUserOnly)]
        [HasPermission(Permission.SettingsManage, Permission.SettingsCustomerBranches)]
        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.SettingsCustomerBranches)]
        [HttpPost]
        [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
        public IActionResult GetBranches([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 == "onlineStatus")
                                whereFilterPredicate.value = (OnlineStatus)((int)((long)whereFilterPredicate.value));
                        }
                    }
                }
            }

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

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

            foreach (var itemVm in resultListVm)
            {
                itemVm.OnlineStatusText = itemVm.OnlineStatus.GetDisplayName(AnnotationsLocalizer);
            }

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

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

        /// <summary>
        /// Anlegen einer Branche
        /// </summary>
        /// <returns>PartialView</returns>
        [Authorize(Policy = Policies.PowerUserOnly)]
        [HasPermission(Permission.SettingsManage, Permission.SettingsCustomerBranches)]
        [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
        public IActionResult Create()
        {
            var model = new BranchVm()
            {
                Id = Guid.NewGuid().ToString("N"),
                TextVms = new List<BranchTextVm>(),
                OnlineStatus = OnlineStatusVm.Offline,
                ListingAllowed = false
            };

            foreach (var language in _languageService.GetAllIso2())
            {
                model.TextVms.Add(new BranchTextVm() { Id = model.Id, Language = language, Name = string.Empty, Description = string.Empty, ImageLanguage = string.Empty });
            }

            return PartialView("_Create", model);
        }

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

            if (ModelState.IsValid)
            {
                var item = _branchService.Create();
                _mapper.Map(model, item);
                item.Created = DateTimeOffset.UtcNow;
                item.UpdatedAt = DateTimeOffset.UtcNow;

                // Texte setzen
                foreach (var textVm in model.TextVms)
                {
                    item.Set("Name", textVm.Language, textVm.Name);
                    item.Set("Description", textVm.Language, textVm.Description);
                    item.Set("ImageLanguage", textVm.Language, textVm.ImageLanguage);

                    if (!string.IsNullOrWhiteSpace(textVm.ImageLanguage))
                    {
                        //Neue Bilddaten verwenden....
                        var extension = Path.GetExtension(textVm.ImageLanguage);
                        var fileName = Path.GetFileName(textVm.ImageLanguage);
                        var filenameToUse = FileServiceHelper.GetBranchPath(item.Id) + $"bra_{textVm.Language}-{Guid.NewGuid():N}{extension}";
                        item.Set("ImageLanguage", textVm.Language, filenameToUse);

                        //Kopieren
                        var tempFile = await FileService.GetAsync(FileServiceHelper.TempContainer, textVm.ImageLanguage);
                        await FileService.StoreAsync(FileServiceHelper.DocumentContainer, filenameToUse, tempFile);

                        //Thumbnails
                        await GenerateThumbnailByWidth(FileServiceHelper.DocumentContainer, filenameToUse, 400);
                        await GenerateThumbnailByWidth(FileServiceHelper.DocumentContainer, filenameToUse, 200);
                        await GenerateThumbnailByWidth(FileServiceHelper.DocumentContainer, filenameToUse, 100);
                    }
                }

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

                if (!string.IsNullOrWhiteSpace(model.Image))
                {
                    //Nun das Bild umbenennen und dann kopieren. Ebenso Thumbnails erstellen
                    var extension = Path.GetExtension(model.Image);
                    var fileName = Path.GetFileName(model.Image);

                    var filenameToUse = FileServiceHelper.GetBranchPath(item.Id) + $"bra_{Guid.NewGuid():N}{extension}";
                    item.Image = filenameToUse;
                    await _branchService.CommitAsync(User.Identity.Name);

                    //Kopieren
                    var tempFile = await FileService.GetAsync(FileServiceHelper.TempContainer, model.Image);
                    await FileService.StoreAsync(FileServiceHelper.DocumentContainer, filenameToUse, tempFile);

                    //Thumbnails
                    await GenerateThumbnailByWidth(FileServiceHelper.DocumentContainer, filenameToUse, 400);
                    await GenerateThumbnailByWidth(FileServiceHelper.DocumentContainer, filenameToUse, 200);
                    await GenerateThumbnailByWidth(FileServiceHelper.DocumentContainer, filenameToUse, 100);

                    //Altes Löschen
                    await FileService.DeleteAsync(FileServiceHelper.TempContainer, model.Image);
                }

                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 Branche
        /// </summary>
        /// <param name="id">Id der Rubrik</param>
        /// <returns>PartialView</returns>
        [Authorize(Policy = Policies.PowerUserOnly)]
        [HasPermission(Permission.SettingsManage, Permission.SettingsCustomerBranches)]
        [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
        public async Task<IActionResult> Edit(string id)
        {
            var item = await _branchService.GetAsync(id);
            if (item != null)
            {
                var model = _mapper.Map<BranchVm>(item);

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

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

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

            if (ModelState.IsValid)
            {
                var item = await _branchService.GetAsync(model.Id);
                if (item is { Deleted: false })
                {
                    if (item.Version.SequenceEqual(model.Version))
                    {
                        var oldImage = item.Image;

                        _mapper.Map(model, item);

                        //Texte setzen
                        foreach (var textVm in model.TextVms)
                        {
                            item.Set("Name", textVm.Language, textVm.Name);
                            item.Set("Description", textVm.Language, textVm.Description);
                            var oldLangImage = item.Get("ImageLanguage", textVm.Language, true);
                            item.Set("ImageLanguage", textVm.Language, textVm.ImageLanguage);

                            if (oldLangImage != textVm.ImageLanguage)
                            {
                                //Alte Daten löschen, neue Daten anlegen
                                if (!string.IsNullOrWhiteSpace(oldLangImage))
                                {
                                    await FileService.DeleteAsync(FileServiceHelper.DocumentContainer, oldLangImage);
                                    await RemoveThumbnail(FileServiceHelper.DocumentContainer, oldLangImage, 400);
                                    await RemoveThumbnail(FileServiceHelper.DocumentContainer, oldLangImage, 200);
                                    await RemoveThumbnail(FileServiceHelper.DocumentContainer, oldLangImage, 100);
                                }

                                if (!string.IsNullOrWhiteSpace(textVm.ImageLanguage))
                                {
                                    //Neue Bilddaten verwenden....
                                    var extension = Path.GetExtension(textVm.ImageLanguage);
                                    var fileName = Path.GetFileName(textVm.ImageLanguage);
                                    var filenameToUse = FileServiceHelper.GetBranchPath(item.Id) + $"bra_{textVm.Language}-{Guid.NewGuid():N}{extension}";
                                    item.Set("ImageLanguage", textVm.Language, filenameToUse);

                                    //Kopieren
                                    var tempFile = await FileService.GetAsync(FileServiceHelper.TempContainer, textVm.ImageLanguage);
                                    await FileService.StoreAsync(FileServiceHelper.DocumentContainer, filenameToUse, tempFile);

                                    //Thumbnails
                                    await GenerateThumbnailByWidth(FileServiceHelper.DocumentContainer, filenameToUse, 400);
                                    await GenerateThumbnailByWidth(FileServiceHelper.DocumentContainer, filenameToUse, 200);
                                    await GenerateThumbnailByWidth(FileServiceHelper.DocumentContainer, filenameToUse, 100);
                                }
                            }
                        }

                        item.UpdatedAt = DateTimeOffset.UtcNow;

                        if (oldImage != item.Image)
                        {
                            //Alte Daten löschen, neue Daten anlegen
                            if (!string.IsNullOrWhiteSpace(oldImage))
                            {
                                await FileService.DeleteAsync(FileServiceHelper.DocumentContainer, oldImage);
                                await RemoveThumbnail(FileServiceHelper.DocumentContainer, oldImage, 400);
                                await RemoveThumbnail(FileServiceHelper.DocumentContainer, oldImage, 200);
                                await RemoveThumbnail(FileServiceHelper.DocumentContainer, oldImage, 100);
                            }

                            if (!string.IsNullOrWhiteSpace(item.Image))
                            {
                                //Neue Bilddaten verwenden....
                                var extension = Path.GetExtension(item.Image);
                                var fileName = Path.GetFileName(item.Image);
                                var filenameToUse = FileServiceHelper.GetBranchPath(item.Id) + $"bra_{Guid.NewGuid():N}{extension}";
                                item.Image = filenameToUse;

                                //Kopieren
                                var tempFile = await FileService.GetAsync(FileServiceHelper.TempContainer, model.Image);
                                await FileService.StoreAsync(FileServiceHelper.DocumentContainer, filenameToUse, tempFile);

                                //Thumbnails
                                await GenerateThumbnailByWidth(FileServiceHelper.DocumentContainer, filenameToUse, 400);
                                await GenerateThumbnailByWidth(FileServiceHelper.DocumentContainer, filenameToUse, 200);
                                await GenerateThumbnailByWidth(FileServiceHelper.DocumentContainer, filenameToUse, 100);
                            }
                        }

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

                        result.Data = item.ToCamelCaseJson();
                        result.Success = true;
                        result.Html = string.Empty;
                        return Json(new { result.Success, result.Html, result.Data });
                    }
                    else
                    {
                        ModelState.AddModelError("", _localizer["Err_Entity_Changed"].Value);
                    }
                }
                else
                {
                    ModelState.AddModelError("", _localizer["Err_Entity_Deleted"].Value);
                }
            }

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

        /// <summary>
        /// Löschen einer Branche
        /// </summary>
        /// <param name="ids">Liste Id der Entität</param>
        /// <param name="forceDelete">Sollen die Daten physisch gelöscht werden?</param>
        /// <returns>Json</returns>
        [Authorize(Policy = Policies.PowerUserOnly)]
        [HasPermission(Permission.SettingsManage, Permission.SettingsCustomerBranches)]
        [HttpPost]
        public async Task<IActionResult> Delete(List<string> ids, bool forceDelete = false)
        {
            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 _branchService.GetAsync(id);
                if (item != null)
                {
                    //await _customerService.ResetTypeAsync(item.Id); //Spezial zurücksetzen wenn nötig
                    var usedCount = 0;

                    if (usedCount == 0)
                    {
                        //TODO: Zurücksetzen der Kunden? Andere?
                        await _customerService.ResetBranchAsync(item.Id);
                        await _customerService.ResetBranchListingsAsync(item.Id);
                        await _listingService.DeleteByBranchAsync(item.Id, forceDelete);

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

                        if (forceDelete)
                        {
                            var postingPath = FileServiceHelper.GetBranchPath(item.Id);
                            await FileService.ClearDirectoryAsync(FileServiceHelper.DocumentContainer, postingPath);
                            await RemoveThumbnail(FileServiceHelper.DocumentContainer, item.Image, 400);
                            await RemoveThumbnail(FileServiceHelper.DocumentContainer, item.Image, 200);
                            await RemoveThumbnail(FileServiceHelper.DocumentContainer, item.Image, 100);

                            var languages = item.GetLanguages("ImageLanguage");
                            foreach (var language in languages)
                            {
                                item.SetLanguage(language);
                                var imageLocalized = item.ImageLanguage;
                                if (string.IsNullOrWhiteSpace(imageLocalized)) continue;
                                await RemoveThumbnail(FileServiceHelper.DocumentContainer, imageLocalized, 400);
                                await RemoveThumbnail(FileServiceHelper.DocumentContainer, imageLocalized, 200);
                                await RemoveThumbnail(FileServiceHelper.DocumentContainer, imageLocalized, 100);
                            }

                            _branchService.Remove(item);
                        }
                        else
                        {
                            item.Deleted = true;
                            item.UpdatedAt = DateTimeOffset.UtcNow;
                        }
                    }
                    else
                    {
                        if (usedCount != 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>{usedCount}</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 _branchService.CommitAsync(User.Identity.Name);
            return Json(batchResult);
        }

        #region Lookup

        /// <summary>
        /// Gibt eine Liste von Branchen für LookUp zurück
        /// </summary>
        /// <param name="dm">DataManager</param>
        /// <param name="includeNone">Soll "Keine(r)" integriert werden</param>
        /// <returns>Liste</returns>
        [Authorize(Policy = Policies.PowerUserOnly)]
        public async Task<IActionResult> Lookup([FromBody] DataManager dm, bool includeNone = false)
        {
            var filter = string.Empty;
            if (dm.Where?.FirstOrDefault() != null)
            {
                filter = dm.Where.First().value.ToString();
                if (filter.IndexOf('(') > 0)
                {
                    filter = filter.Substring(0, (filter.IndexOf('(') - 1));
                    filter = filter.TrimEnd();
                }
            }

            var items = await _branchService.FilterWithNames(filter, SelectedLanguage, FallbackLanguage, false).ToListAsync();
            var result = items.Select(item => new LookupItemVm() { Id = item.Id.ToString(), Name = $"{item.Name}" }).OrderBy(c => c.Name).ToList();

            if (includeNone)
                result.Insert(0, new LookupItemVm() { Id = "", Name = _localizer["Common_None"].ToString() });

            return Json(result);
        }

        /// <summary>
        /// Gibt eine Liste von Branchen für Listungen für LookUp zurück
        /// </summary>
        /// <param name="dm">DataManager</param>
        /// <returns>Liste</returns>
        [Authorize(Policy = Policies.PowerUserOnly)]
        public async Task<IActionResult> LookupListings([FromBody] DataManager dm)
        {
            var filter = string.Empty;
            if (dm.Where?.FirstOrDefault() != null)
            {
                filter = dm.Where.First().value.ToString();
                if (filter.IndexOf('(') > 0)
                {
                    filter = filter.Substring(0, (filter.IndexOf('(') - 1));
                    filter = filter.TrimEnd();
                }
            }

            var items = await _branchService.FilterWithNamesListings(filter, SelectedLanguage, FallbackLanguage, false).ToListAsync();
            var result = items.Select(item => new LookupItemVm() { Id = item.Id.ToString(), Name = $"{item.Name}" }).OrderBy(c => c.Name).ToList();

            return Json(result);
        }

        /// <summary>
        /// Gibt eine Liste von Branchen für Listungen für einen Kuden für LookUp zurück
        /// </summary>
        /// <param name="dm">DataManager</param>
        /// <param name="customerId">Id des Kunden</param>
        /// <returns>Liste</returns>
        [Authorize(Policy = Policies.CustomerOnly)]
        public async Task<IActionResult> LookupCustomer([FromBody] DataManager dm, long customerId)
        {
            var filter = string.Empty;
            if (dm.Where?.FirstOrDefault() != null)
            {
                filter = dm.Where.First().value.ToString();
                if (filter.IndexOf('(') > 0)
                {
                    filter = filter.Substring(0, (filter.IndexOf('(') - 1));
                    filter = filter.TrimEnd();
                }
            }

            var result = new List<LookupItemVm>();

            var customer = await _customerService.GetAsync(customerId);
            if (customer != null)
            {
                var selectedList = new List<string>();
                if (!string.IsNullOrWhiteSpace(customer.BranchesJson))
                    selectedList = customer.BranchesJson.Split(',').ToList();

                var items = await _branchService.FilterWithNamesListings(filter, SelectedLanguage, FallbackLanguage, false).ToListAsync();
                result.AddRange(from item in items where selectedList.Contains(item.Id) select new LookupItemVm() { Id = item.Id.ToString(), Name = $"{item.Name}" });
            }

            return Json(result.OrderBy(c => c.Name));
        }

        #endregion
    }
}