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.Extensions.Localization;

namespace gehGassi.Web.Controllers
{
    /// <summary>
    /// Controller für die Verwaltung von Hunderassen
    /// </summary>
    [Authorize]
    public class DogRaceController : BaseController
    {
        private readonly IMapper _mapper;
        private readonly IStringLocalizer<DogRaceController> _localizer;
        private readonly IDogRaceService _dogRaceService;
        private readonly ILanguageService _languageService;
        private readonly IDogService _dogService;

        /// <summary>
        /// Erstellt eine Instanz
        /// </summary>
        /// <param name="mapper">Instanz eines IMapper</param>
        /// <param name="localizer">Instanz eines IStringLocalizer</param>
        /// <param name="dogRaceService">Instanz eine IDogRaceService</param>
        /// <param name="languageService">Instanz eines ILanguageService</param>
        /// <param name="dogService">Instanz eines IDogService</param>
        public DogRaceController(IMapper mapper, IStringLocalizer<DogRaceController> localizer, IDogRaceService dogRaceService, ILanguageService languageService, IDogService dogService)
        {
            _mapper = mapper;
            _localizer = localizer;
            _dogRaceService = dogRaceService;
            _languageService = languageService;
            _dogService = dogService;
        }

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

            var resultList = _dogRaceService.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<DogRaceListVm>(item)).ToList();

            foreach (var itemVm in resultListVm)
            {
                itemVm.Photo = Tools.GetLogoThumb(itemVm.Photo, 100);
            }

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

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

        /// <summary>
        /// Anlegen einer Hunderasse
        /// </summary>
        /// <returns>PartialView</returns>
        [Authorize(Policy = Policies.PowerUserOnly)]
        [HasPermission(Permission.SettingsManage, Permission.SettingsDogRaces)]
        [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
        public IActionResult Create()
        {
            var model = new DogRaceVm()
            {
                Id = Guid.NewGuid().ToString("N"),
                TextVms = new List<DogRaceTextVm>()
            };

            foreach (var language in _languageService.GetAllIso2())
            {
                model.TextVms.Add(new DogRaceTextVm()
                {
                    Id = model.Id, 
                    Language = language, 
                    Name = string.Empty, 
                    Description = string.Empty,
                    Age = string.Empty,
                    Care = string.Empty,
                    Coexistence = string.Empty,
                    Decision = string.Empty,
                    Personality = string.Empty,
                    SizeAndWeight = string.Empty
                });
            }

            return PartialView("_Create", model);
        }

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

            if (ModelState.IsValid)
            {
                var item = _dogRaceService.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("Age", textVm.Language, textVm.Age);
                    item.Set("SizeAndWeight", textVm.Language, textVm.SizeAndWeight);
                    item.Set("Personality", textVm.Language, textVm.Personality);
                    item.Set("Coexistence", textVm.Language, textVm.Coexistence);
                    item.Set("Care", textVm.Language, textVm.Care);
                    item.Set("Decision", textVm.Language, textVm.Decision);
                }

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

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

                    var filenameToUse = FileServiceHelper.GetDogRacePath(item.Id) + $"dr_{Guid.NewGuid():N}{extension}";
                    item.Photo = filenameToUse;
                    await _dogRaceService.CommitAsync(User.Identity.Name);

                    //Kopieren
                    var tempFile = await FileService.GetAsync(FileServiceHelper.TempContainer, model.Photo);
                    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.Photo);
                }

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

                model.TextVms = new List<DogRaceTextVm>();
                foreach (var language in _languageService.GetAllIso2())
                {
                    model.TextVms.Add(new DogRaceTextVm()
                    {
                        Id = item.Id,
                        Language = language,
                        Name = item.Get("Name", language, true),
                        Description = item.Get("Description", language, true),
                        Age = item.Get("Age", language, true),
                        Care = item.Get("Care", language, true),
                        Coexistence = item.Get("Coexistence", language, true),
                        Decision = item.Get("Decision", language, true),
                        Personality = item.Get("Personality", language, true),
                        SizeAndWeight = item.Get("SizeAndWeight", language, true)
                    });
                }

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

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

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

                        _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);
                            item.Set("Age", textVm.Language, textVm.Age);
                            item.Set("SizeAndWeight", textVm.Language, textVm.SizeAndWeight);
                            item.Set("Personality", textVm.Language, textVm.Personality);
                            item.Set("Coexistence", textVm.Language, textVm.Coexistence);
                            item.Set("Care", textVm.Language, textVm.Care);
                            item.Set("Decision", textVm.Language, textVm.Decision);
                        }

                        item.UpdatedAt = DateTimeOffset.UtcNow;

                        if (oldImage != item.Photo)
                        {
                            //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.Photo))
                            {
                                //Neue Bilddaten verwenden....
                                var extension = Path.GetExtension(item.Photo);
                                var fileName = Path.GetFileName(item.Photo);
                                var filenameToUse = FileServiceHelper.GetDogRacePath(item.Id) + $"dr_{Guid.NewGuid():N}{extension}";
                                item.Photo = filenameToUse;

                                //Kopieren
                                var tempFile = await FileService.GetAsync(FileServiceHelper.TempContainer, model.Photo);
                                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 _dogRaceService.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 Hunderasse
        /// </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.SettingsDogRaces)]
        [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 _dogRaceService.GetAsync(id);
                if (item != null)
                {
                    //await _customerService.ResetTypeAsync(item.Id); //Spezial zurücksetzen wenn nötig
                    //TODO: prüfen ob die Rasse verwendet wird!!!
                    var usedCount = 0;

                    if (usedCount == 0)
                    {
                        //TODO: Zurücksetzen ? Andere?
                        await _dogService.ResetDogRaceAsync(item.Id);

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

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

                            _dogRaceService.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.Name, Success = false, NotFound = false, ErrorMessage = string.Format(_localizer["Common_BatchDelete_InUse"], $"<strong>{item.Name}</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 _dogRaceService.CommitAsync(User.Identity.Name);
            return Json(batchResult);
        }

        #region Lookup

        /// <summary>
        /// Gibt eine Liste von Hunderassen 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 _dogRaceService.SearchWithNamesAsync(filter, SelectedLanguage, FallbackLanguage);
            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);
        }

        #endregion
    }
}