// src/Webshop.Application/Services/Admin/AdminShopInfoService.cs
using System;
using System.Threading.Tasks;
using Webshop.Application;
using Webshop.Application.DTOs.Shop;
using Webshop.Domain.Entities;
using Webshop.Domain.Interfaces;

namespace Webshop.Application.Services.Admin
{
    public class AdminShopInfoService : IAdminShopInfoService
    {
        private readonly IShopInfoRepository _shopInfoRepository;

        public AdminShopInfoService(IShopInfoRepository shopInfoRepository)
        {
            _shopInfoRepository = shopInfoRepository;
        }

        public async Task<ServiceResult<AdminShopInfoDto>> GetShopInfoAsync()
        {
            var shopInfo = await _shopInfoRepository.GetAsync();

            if (shopInfo == null)
            {
                // Erstelle einen Standardeintrag, falls keiner existiert
                shopInfo = new ShopInfo { Id = Guid.NewGuid(), ShopName = "Mein Webshop", ContactEmail = "admin@example.com" };
                await _shopInfoRepository.AddAsync(shopInfo);
            }

            var dto = new AdminShopInfoDto
            {
                ShopName = shopInfo.ShopName,
                Slogan = shopInfo.Slogan,
                ContactEmail = shopInfo.ContactEmail,
                PhoneNumber = shopInfo.PhoneNumber,
                Street = shopInfo.Street,
                City = shopInfo.City,
                PostalCode = shopInfo.PostalCode,
                Country = shopInfo.Country,
                VatNumber = shopInfo.VatNumber,
                CompanyRegistrationNumber = shopInfo.CompanyRegistrationNumber,
                FacebookUrl = shopInfo.FacebookUrl,
                InstagramUrl = shopInfo.InstagramUrl,
                TwitterUrl = shopInfo.TwitterUrl
            };

            return ServiceResult.Ok(dto);
        }

        public async Task<ServiceResult> UpdateShopInfoAsync(AdminShopInfoDto shopInfoDto)
        {
            var shopInfo = await _shopInfoRepository.GetAsync();
            if (shopInfo == null)
            {
                // Dieser Fall sollte theoretisch nie eintreten, da GetShopInfoAsync die Entität erstellt.
                // Zur Sicherheit fangen wir ihn trotzdem ab.
                return ServiceResult.Fail(ServiceResultType.NotFound, "ShopInfo-Entität existiert nicht und kann nicht aktualisiert werden.");
            }

            // Mappe die Werte vom DTO auf die Entität
            shopInfo.ShopName = shopInfoDto.ShopName;
            shopInfo.Slogan = shopInfoDto.Slogan;
            shopInfo.ContactEmail = shopInfoDto.ContactEmail;
            shopInfo.PhoneNumber = shopInfoDto.PhoneNumber;
            shopInfo.Street = shopInfoDto.Street;
            shopInfo.City = shopInfoDto.City;
            shopInfo.PostalCode = shopInfoDto.PostalCode;
            shopInfo.Country = shopInfoDto.Country;
            shopInfo.VatNumber = shopInfoDto.VatNumber;
            shopInfo.CompanyRegistrationNumber = shopInfoDto.CompanyRegistrationNumber;
            shopInfo.FacebookUrl = shopInfoDto.FacebookUrl;
            shopInfo.InstagramUrl = shopInfoDto.InstagramUrl;
            shopInfo.TwitterUrl = shopInfoDto.TwitterUrl;

            await _shopInfoRepository.UpdateAsync(shopInfo);
            return ServiceResult.Ok();
        }
    }
}