using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using AutoMapper;
using gehGassi.Common.Data;
using gehGassi.Core.Interfaces;
using gehGassi.Core.Services;
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 Versandkosten
    /// </summary>
    [Authorize]
    public class ShipmentCostController : BaseController
    {
        private readonly IMapper _mapper;
        private readonly IStringLocalizer<ShipmentCostController> _localizer;
        private readonly IShipmentCostService _shipmentCostService;
        private readonly ICountryService _countryService;

        /// <summary>
        /// Erstellt eine Instanz
        /// </summary>
        /// <param name="mapper">Instanz eines IMapper</param>
        /// <param name="localizer">Instanz eines IStringLocalizer</param>
        /// <param name="shipmentCostService">Instanz eines IShipmentCostService</param>
        /// <param name="countryService">Instanz eines ICountryService</param>
        public ShipmentCostController(IMapper mapper, IStringLocalizer<ShipmentCostController> localizer, IShipmentCostService shipmentCostService, ICountryService countryService)
        {
            _mapper = mapper;
            _localizer = localizer;
            _shipmentCostService = shipmentCostService;
            _countryService = countryService;
        }

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

            var resultList = _shipmentCostService.Filter(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<ShipmentCostVm>(item)).ToList();

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

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

        /// <summary>
        /// Anlegen einer Versandkostenregel
        /// </summary>
        /// <returns>PartialView</returns>
        [Authorize(Policy = Policies.PowerUserOnly)]
        [HasPermission(Permission.SettingsManage, Permission.SettingsShipment)]
        [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
        public IActionResult Create()
        {
            var model = new ShipmentCostCrudVm()
            {
                TargetCountryIso = "--",
                TargetCountryName = _localizer["Common_All"]
            };

            return PartialView("_Create", model);
        }

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

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

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

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

            ModelState.Remove("TargetCountryName");
            var country = _countryService.GetCountry(model.TargetCountryIso);
            model.TargetCountryName = country != null ? country.Name : "";
            if (model.TargetCountryIso == "--")
                model.TargetCountryName = _localizer["Common_All"];

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

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

                var country = _countryService.GetCountry(item.TargetCountryIso);
                model.TargetCountryName = country != null ? country.Name : "";
                if (model.TargetCountryIso == "--")
                    model.TargetCountryName = _localizer["Common_All"];

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

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

            if (ModelState.IsValid)
            {
                var item = await _shipmentCostService.GetAsync(model.Id);
                if (item != null)
                {
                    _mapper.Map(model, item);

                    await _shipmentCostService.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("TargetCountryName");
            var country = _countryService.GetCountry(model.TargetCountryIso);
            model.TargetCountryName = country != null ? country.Name : "";
            if (model.TargetCountryIso == "--")
                model.TargetCountryName = _localizer["Common_All"];

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

        /// <summary>
        /// Löschen einer Versandkostenregel
        /// </summary>
        /// <param name="ids">Liste Id der Entität</param>
        /// <returns>Json</returns>
        [Authorize(Policy = Policies.PowerUserOnly)]
        [HasPermission(Permission.SettingsManage, Permission.SettingsShipment)]
        [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 _shipmentCostService.GetAsync(id);
                if (item != null)
                {
                    //await _customerService.ResetTypeAsync(item.Id); //Spezial zurücksetzen wenn nötig
                    var usedCount = 0;

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

                        _shipmentCostService.Remove(item);
                    }
                    else
                    {
                        if (usedCount != 0)
                        {
                            batchResult.Success = false;
                            batchResult.BatchResponseList.Add(new BatchResponseItemVm() { Id = id.ToString(), Name = item.TargetCountryIso, Success = false, NotFound = false, ErrorMessage = string.Format(_localizer["Common_BatchDelete_InUse"], $"<strong>{item.TargetCountryIso}</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 _shipmentCostService.CommitAsync(User.Identity.Name);
            return Json(batchResult);
        }

        #region Lookup

        /// <summary>
        /// Gibt eine Liste von Ländern für LookUp zurück - nur für Versandregeln
        /// </summary>
        /// <returns>Liste</returns>
        [Authorize(Policy = Policies.PowerUserOnly)]
        [HasPermission(Permission.SettingsManage, Permission.SettingsShipment)]
        public IActionResult LookupCountries([FromBody] DataManager dm)
        {
            var result = new List<LookupItemVm>();
            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 countries = _countryService.GetCountries().OrderBy(c => c.Name);

            var items = countries.Where(c => c.Name.ToLower().Contains(filter.ToLower()));

            foreach (var item in items)
            {
                result.Add(new LookupItemVm() { Id = item.Iso2.ToString(), Name = $"{item.Name}" });
            }

            result.Insert(0, new LookupItemVm() { Id = "--", Name = _localizer["Common_All"].ToString() });
            return Json(result);
        }

        #endregion
    }
}