// src/Webshop.Application/Services/Admin/AdminSupplierService.cs
using Webshop.Application.DTOs; // SupplierDto
using Webshop.Domain.Entities;
using Webshop.Domain.Interfaces;
using System.Collections.Generic; // Für IEnumerable

namespace Webshop.Application.Services.Admin
{
    public class AdminSupplierService
    {
        private readonly ISupplierRepository _supplierRepository;

        public AdminSupplierService(ISupplierRepository supplierRepository)
        {
            _supplierRepository = supplierRepository;
        }

        public async Task<IEnumerable<SupplierDto>> GetAllSuppliersAsync()
        {
            var suppliers = await _supplierRepository.GetAllSuppliersAsync();
            return suppliers.Select(s => new SupplierDto
            {
                Id = s.Id,
                Name = s.Name,
                ContactPerson = s.ContactPerson,
                Email = s.Email,
                PhoneNumber = s.PhoneNumber,
                AddressId = s.AddressId,
                Notes = s.Notes
            }).ToList();
        }

        public async Task<SupplierDto?> GetSupplierByIdAsync(Guid id)
        {
            var supplier = await _supplierRepository.GetSupplierByIdAsync(id);
            if (supplier == null) return null;
            return new SupplierDto
            {
                Id = supplier.Id,
                Name = supplier.Name,
                ContactPerson = supplier.ContactPerson,
                Email = supplier.Email,
                PhoneNumber = supplier.PhoneNumber,
                AddressId = supplier.AddressId,
                Notes = supplier.Notes
            };
        }

        public async Task<SupplierDto> CreateSupplierAsync(SupplierDto supplierDto)
        {
            var newSupplier = new Supplier
            {
                Id = Guid.NewGuid(), // API generiert die ID
                Name = supplierDto.Name,
                ContactPerson = supplierDto.ContactPerson,
                Email = supplierDto.Email,
                PhoneNumber = supplierDto.PhoneNumber,
                AddressId = supplierDto.AddressId,
                Notes = supplierDto.Notes
            };
            await _supplierRepository.AddSupplierAsync(newSupplier);
            supplierDto.Id = newSupplier.Id; // ID zurückschreiben
            return supplierDto;
        }

        // TODO: UpdateSupplierAsync, DeleteSupplierAsync
    }
}