using System;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Primitives;
using Nop.Core.Domain.Catalog;
using Nop.Core.Domain.Common;
using Nop.Core.Domain.Vendors;
using Nop.Services.Common;
using Nop.Services.Customers;
using Nop.Services.Localization;
using Nop.Services.Logging;
using Nop.Services.Media;
using Nop.Services.Messages;
using Nop.Services.Security;
using Nop.Services.Seo;
using Nop.Services.Vendors;
using Nop.Web.Areas.Admin.Factories;
using Nop.Web.Areas.Admin.Infrastructure.Mapper.Extensions;
using Nop.Web.Areas.Admin.Models.Vendors;
using Nop.Web.Framework.Controllers;
using Nop.Web.Framework.Mvc;
using Nop.Web.Framework.Mvc.Filters;

namespace Nop.Web.Areas.Admin.Controllers
{
    public partial class VendorController : BaseAdminController
    {
        #region Fields

        private readonly IAddressService _addressService;
        private readonly ICustomerActivityService _customerActivityService;
        private readonly ICustomerService _customerService;
        private readonly IGenericAttributeService _genericAttributeService;
        private readonly ILocalizationService _localizationService;
        private readonly ILocalizedEntityService _localizedEntityService;
        private readonly INotificationService _notificationService;
        private readonly IPermissionService _permissionService;
        private readonly IPictureService _pictureService;
        private readonly IUrlRecordService _urlRecordService;
        private readonly IVendorAttributeParser _vendorAttributeParser;
        private readonly IVendorAttributeService _vendorAttributeService;
        private readonly IVendorModelFactory _vendorModelFactory;
        private readonly IVendorService _vendorService;

        #endregion

        #region Ctor

        public VendorController(IAddressService addressService,
            ICustomerActivityService customerActivityService,
            ICustomerService customerService,
            IGenericAttributeService genericAttributeService,
            ILocalizationService localizationService,
            ILocalizedEntityService localizedEntityService,
            INotificationService notificationService,
            IPermissionService permissionService,
            IPictureService pictureService,
            IUrlRecordService urlRecordService,
            IVendorAttributeParser vendorAttributeParser,
            IVendorAttributeService vendorAttributeService,
            IVendorModelFactory vendorModelFactory,
            IVendorService vendorService)
        {
            _addressService = addressService;
            _customerActivityService = customerActivityService;
            _customerService = customerService;
            _genericAttributeService = genericAttributeService;
            _localizationService = localizationService;
            _localizedEntityService = localizedEntityService;
            _notificationService = notificationService;
            _permissionService = permissionService;
            _pictureService = pictureService;
            _urlRecordService = urlRecordService;
            _vendorAttributeParser = vendorAttributeParser;
            _vendorAttributeService = vendorAttributeService;
            _vendorModelFactory = vendorModelFactory;
            _vendorService = vendorService;
        }

        #endregion

        #region Utilities

        protected virtual async Task UpdatePictureSeoNamesAsync(Vendor vendor)
        {
            var picture = await _pictureService.GetPictureByIdAsync(vendor.PictureId);
            if (picture != null)
                await _pictureService.SetSeoFilenameAsync(picture.Id, await _pictureService.GetPictureSeNameAsync(vendor.Name));
        }

        protected virtual async Task UpdateLocalesAsync(Vendor vendor, VendorModel model)
        {
            foreach (var localized in model.Locales)
            {
                await _localizedEntityService.SaveLocalizedValueAsync(vendor,
                    x => x.Name,
                    localized.Name,
                    localized.LanguageId);

                await _localizedEntityService.SaveLocalizedValueAsync(vendor,
                    x => x.Description,
                    localized.Description,
                    localized.LanguageId);

                await _localizedEntityService.SaveLocalizedValueAsync(vendor,
                    x => x.MetaKeywords,
                    localized.MetaKeywords,
                    localized.LanguageId);

                await _localizedEntityService.SaveLocalizedValueAsync(vendor,
                    x => x.MetaDescription,
                    localized.MetaDescription,
                    localized.LanguageId);

                await _localizedEntityService.SaveLocalizedValueAsync(vendor,
                    x => x.MetaTitle,
                    localized.MetaTitle,
                    localized.LanguageId);

                //search engine name
                var seName = await _urlRecordService.ValidateSeNameAsync(vendor, localized.SeName, localized.Name, false);
                await _urlRecordService.SaveSlugAsync(vendor, seName, localized.LanguageId);
            }
        }

        protected virtual async Task<string> ParseVendorAttributesAsync(IFormCollection form)
        {
            if (form == null)
                throw new ArgumentNullException(nameof(form));

            var attributesXml = string.Empty;
            var vendorAttributes = await _vendorAttributeService.GetAllVendorAttributesAsync();
            foreach (var attribute in vendorAttributes)
            {
                var controlId = $"{NopVendorDefaults.VendorAttributePrefix}{attribute.Id}";
                StringValues ctrlAttributes;
                switch (attribute.AttributeControlType)
                {
                    case AttributeControlType.DropdownList:
                    case AttributeControlType.RadioList:
                        ctrlAttributes = form[controlId];
                        if (!StringValues.IsNullOrEmpty(ctrlAttributes))
                        {
                            var selectedAttributeId = int.Parse(ctrlAttributes);
                            if (selectedAttributeId > 0)
                                attributesXml = _vendorAttributeParser.AddVendorAttribute(attributesXml,
                                    attribute, selectedAttributeId.ToString());
                        }

                        break;
                    case AttributeControlType.Checkboxes:
                        var cblAttributes = form[controlId];
                        if (!StringValues.IsNullOrEmpty(cblAttributes))
                        {
                            foreach (var item in cblAttributes.ToString().Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries))
                            {
                                var selectedAttributeId = int.Parse(item);
                                if (selectedAttributeId > 0)
                                    attributesXml = _vendorAttributeParser.AddVendorAttribute(attributesXml,
                                        attribute, selectedAttributeId.ToString());
                            }
                        }

                        break;
                    case AttributeControlType.ReadonlyCheckboxes:
                        //load read-only (already server-side selected) values
                        var attributeValues = await _vendorAttributeService.GetVendorAttributeValuesAsync(attribute.Id);
                        foreach (var selectedAttributeId in attributeValues
                            .Where(v => v.IsPreSelected)
                            .Select(v => v.Id)
                            .ToList())
                        {
                            attributesXml = _vendorAttributeParser.AddVendorAttribute(attributesXml,
                                attribute, selectedAttributeId.ToString());
                        }

                        break;
                    case AttributeControlType.TextBox:
                    case AttributeControlType.MultilineTextbox:
                        ctrlAttributes = form[controlId];
                        if (!StringValues.IsNullOrEmpty(ctrlAttributes))
                        {
                            var enteredText = ctrlAttributes.ToString().Trim();
                            attributesXml = _vendorAttributeParser.AddVendorAttribute(attributesXml,
                                attribute, enteredText);
                        }

                        break;
                    case AttributeControlType.Datepicker:
                    case AttributeControlType.ColorSquares:
                    case AttributeControlType.ImageSquares:
                    case AttributeControlType.FileUpload:
                    //not supported vendor attributes
                    default:
                        break;
                }
            }

            return attributesXml;
        }

        #endregion

        #region Vendors

        public virtual IActionResult Index()
        {
            return RedirectToAction("List");
        }

        public virtual async Task<IActionResult> List()
        {
            if (!await _permissionService.AuthorizeAsync(StandardPermissionProvider.ManageVendors))
                return AccessDeniedView();

            //prepare model
            var model = await _vendorModelFactory.PrepareVendorSearchModelAsync(new VendorSearchModel());

            return View(model);
        }

        [HttpPost]
        public virtual async Task<IActionResult> List(VendorSearchModel searchModel)
        {
            if (!await _permissionService.AuthorizeAsync(StandardPermissionProvider.ManageVendors))
                return await AccessDeniedDataTablesJson();

            //prepare model
            var model = await _vendorModelFactory.PrepareVendorListModelAsync(searchModel);

            return Json(model);
        }

        public virtual async Task<IActionResult> Create()
        {
            if (!await _permissionService.AuthorizeAsync(StandardPermissionProvider.ManageVendors))
                return AccessDeniedView();

            //prepare model
            var model = await _vendorModelFactory.PrepareVendorModelAsync(new VendorModel(), null);

            return View(model);
        }

        [HttpPost, ParameterBasedOnFormName("save-continue", "continueEditing")]
        [FormValueRequired("save", "save-continue")]
        public virtual async Task<IActionResult> Create(VendorModel model, bool continueEditing, IFormCollection form)
        {
            if (!await _permissionService.AuthorizeAsync(StandardPermissionProvider.ManageVendors))
                return AccessDeniedView();

            //parse vendor attributes
            var vendorAttributesXml = await ParseVendorAttributesAsync(form);
            (await _vendorAttributeParser.GetAttributeWarningsAsync(vendorAttributesXml)).ToList()
                .ForEach(warning => ModelState.AddModelError(string.Empty, warning));

            if (ModelState.IsValid)
            {
                var vendor = model.ToEntity<Vendor>();
                await _vendorService.InsertVendorAsync(vendor);

                //activity log
                await _customerActivityService.InsertActivityAsync("AddNewVendor",
                    string.Format(await _localizationService.GetResourceAsync("ActivityLog.AddNewVendor"), vendor.Id), vendor);

                //search engine name
                model.SeName = await _urlRecordService.ValidateSeNameAsync(vendor, model.SeName, vendor.Name, true);
                await _urlRecordService.SaveSlugAsync(vendor, model.SeName, 0);

                //address
                var address = model.Address.ToEntity<Address>();
                address.CreatedOnUtc = DateTime.UtcNow;

                //some validation
                if (address.CountryId == 0)
                    address.CountryId = null;
                if (address.StateProvinceId == 0)
                    address.StateProvinceId = null;
                await _addressService.InsertAddressAsync(address);
                vendor.AddressId = address.Id;
                await _vendorService.UpdateVendorAsync(vendor);

                //vendor attributes
                await _genericAttributeService.SaveAttributeAsync(vendor, NopVendorDefaults.VendorAttributes, vendorAttributesXml);

                //locales
                await UpdateLocalesAsync(vendor, model);

                //update picture seo file name
                await UpdatePictureSeoNamesAsync(vendor);

                _notificationService.SuccessNotification(await _localizationService.GetResourceAsync("Admin.Vendors.Added"));

                if (!continueEditing)
                    return RedirectToAction("List");
                
                return RedirectToAction("Edit", new { id = vendor.Id });
            }

            //prepare model
            model = await _vendorModelFactory.PrepareVendorModelAsync(model, null, true);

            //if we got this far, something failed, redisplay form
            return View(model);
        }

        public virtual async Task<IActionResult> Edit(int id)
        {
            if (!await _permissionService.AuthorizeAsync(StandardPermissionProvider.ManageVendors))
                return AccessDeniedView();

            //try to get a vendor with the specified id
            var vendor = await _vendorService.GetVendorByIdAsync(id);
            if (vendor == null || vendor.Deleted)
                return RedirectToAction("List");

            //prepare model
            var model = await _vendorModelFactory.PrepareVendorModelAsync(null, vendor);

            return View(model);
        }

        [HttpPost, ParameterBasedOnFormName("save-continue", "continueEditing")]
        public virtual async Task<IActionResult> Edit(VendorModel model, bool continueEditing, IFormCollection form)
        {
            if (!await _permissionService.AuthorizeAsync(StandardPermissionProvider.ManageVendors))
                return AccessDeniedView();

            //try to get a vendor with the specified id
            var vendor = await _vendorService.GetVendorByIdAsync(model.Id);
            if (vendor == null || vendor.Deleted)
                return RedirectToAction("List");

            //parse vendor attributes
            var vendorAttributesXml = await ParseVendorAttributesAsync(form);
            (await _vendorAttributeParser.GetAttributeWarningsAsync(vendorAttributesXml)).ToList()
                .ForEach(warning => ModelState.AddModelError(string.Empty, warning));

            if (ModelState.IsValid)
            {
                var prevPictureId = vendor.PictureId;
                vendor = model.ToEntity(vendor);
                await _vendorService.UpdateVendorAsync(vendor);

                //vendor attributes
                await _genericAttributeService.SaveAttributeAsync(vendor, NopVendorDefaults.VendorAttributes, vendorAttributesXml);

                //activity log
                await _customerActivityService.InsertActivityAsync("EditVendor",
                    string.Format(await _localizationService.GetResourceAsync("ActivityLog.EditVendor"), vendor.Id), vendor);

                //search engine name
                model.SeName = await _urlRecordService.ValidateSeNameAsync(vendor, model.SeName, vendor.Name, true);
                await _urlRecordService.SaveSlugAsync(vendor, model.SeName, 0);

                //address
                var address = await _addressService.GetAddressByIdAsync(vendor.AddressId);
                if (address == null)
                {
                    address = model.Address.ToEntity<Address>();
                    address.CreatedOnUtc = DateTime.UtcNow;

                    //some validation
                    if (address.CountryId == 0)
                        address.CountryId = null;
                    if (address.StateProvinceId == 0)
                        address.StateProvinceId = null;

                    await _addressService.InsertAddressAsync(address);
                    vendor.AddressId = address.Id;
                    await _vendorService.UpdateVendorAsync(vendor);
                }
                else
                {
                    address = model.Address.ToEntity(address);

                    //some validation
                    if (address.CountryId == 0)
                        address.CountryId = null;
                    if (address.StateProvinceId == 0)
                        address.StateProvinceId = null;

                    await _addressService.UpdateAddressAsync(address);
                }

                //locales
                await UpdateLocalesAsync(vendor, model);

                //delete an old picture (if deleted or updated)
                if (prevPictureId > 0 && prevPictureId != vendor.PictureId)
                {
                    var prevPicture = await _pictureService.GetPictureByIdAsync(prevPictureId);
                    if (prevPicture != null)
                        await _pictureService.DeletePictureAsync(prevPicture);
                }
                //update picture seo file name
                await UpdatePictureSeoNamesAsync(vendor);

                _notificationService.SuccessNotification(await _localizationService.GetResourceAsync("Admin.Vendors.Updated"));

                if (!continueEditing)
                    return RedirectToAction("List");
                
                return RedirectToAction("Edit", new { id = vendor.Id });
            }

            //prepare model
            model = await _vendorModelFactory.PrepareVendorModelAsync(model, vendor, true);

            //if we got this far, something failed, redisplay form
            return View(model);
        }

        [HttpPost]
        public virtual async Task<IActionResult> Delete(int id)
        {
            if (!await _permissionService.AuthorizeAsync(StandardPermissionProvider.ManageVendors))
                return AccessDeniedView();

            //try to get a vendor with the specified id
            var vendor = await _vendorService.GetVendorByIdAsync(id);
            if (vendor == null)
                return RedirectToAction("List");

            //clear associated customer references
            var associatedCustomers = await _customerService.GetAllCustomersAsync(vendorId: vendor.Id);
            foreach (var customer in associatedCustomers)
            {
                customer.VendorId = 0;
                await _customerService.UpdateCustomerAsync(customer);
            }

            //delete a vendor
            await _vendorService.DeleteVendorAsync(vendor);

            //activity log
            await _customerActivityService.InsertActivityAsync("DeleteVendor",
                string.Format(await _localizationService.GetResourceAsync("ActivityLog.DeleteVendor"), vendor.Id), vendor);

            _notificationService.SuccessNotification(await _localizationService.GetResourceAsync("Admin.Vendors.Deleted"));

            return RedirectToAction("List");
        }

        #endregion

        #region Vendor notes

        [HttpPost]
        public virtual async Task<IActionResult> VendorNotesSelect(VendorNoteSearchModel searchModel)
        {
            if (!await _permissionService.AuthorizeAsync(StandardPermissionProvider.ManageVendors))
                return await AccessDeniedDataTablesJson();

            //try to get a vendor with the specified id
            var vendor = await _vendorService.GetVendorByIdAsync(searchModel.VendorId)
                ?? throw new ArgumentException("No vendor found with the specified id");

            //prepare model
            var model = await _vendorModelFactory.PrepareVendorNoteListModelAsync(searchModel, vendor);

            return Json(model);
        }

        public virtual async Task<IActionResult> VendorNoteAdd(int vendorId, string message)
        {
            if (!await _permissionService.AuthorizeAsync(StandardPermissionProvider.ManageVendors))
                return AccessDeniedView();

            if (string.IsNullOrEmpty(message))
                return ErrorJson(await _localizationService.GetResourceAsync("Admin.Vendors.VendorNotes.Fields.Note.Validation"));

            //try to get a vendor with the specified id
            var vendor = await _vendorService.GetVendorByIdAsync(vendorId);
            if (vendor == null)
                return ErrorJson("Vendor cannot be loaded");

            await _vendorService.InsertVendorNoteAsync(new VendorNote
            {
                Note = message,
                CreatedOnUtc = DateTime.UtcNow,
                VendorId = vendor.Id
            });

            return Json(new { Result = true });
        }

        [HttpPost]
        public virtual async Task<IActionResult> VendorNoteDelete(int id)
        {
            if (!await _permissionService.AuthorizeAsync(StandardPermissionProvider.ManageVendors))
                return AccessDeniedView();

            //try to get a vendor note with the specified id
            var vendorNote = await _vendorService.GetVendorNoteByIdAsync(id)
                ?? throw new ArgumentException("No vendor note found with the specified id", nameof(id));

            await _vendorService.DeleteVendorNoteAsync(vendorNote);

            return new NullJsonResult();
        }

        #endregion
    }
}