// src/Webshop.Application/Services/Admin/AdminShippingMethodService.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Webshop.Application.DTOs.Shipping;
using Webshop.Domain.Entities;
using Webshop.Domain.Interfaces;

namespace Webshop.Application.Services.Admin
{
    public class AdminShippingMethodService : IAdminShippingMethodService
    {
        private readonly IShippingMethodRepository _shippingMethodRepository;

        public AdminShippingMethodService(IShippingMethodRepository shippingMethodRepository)
        {
            _shippingMethodRepository = shippingMethodRepository;
        }

        public async Task<IEnumerable<ShippingMethodDto>> GetAllAsync()
        {
            var methods = await _shippingMethodRepository.GetAllAsync();
            return methods.Select(sm => new ShippingMethodDto
            {
                Id = sm.Id,
                Name = sm.Name,
                Description = sm.Description,
                Cost = sm.BaseCost,
                IsActive = sm.IsActive,
                MinDeliveryDays = 0, // Annahme, diese Felder existieren in Ihrer Entität
                MaxDeliveryDays = 0  // Annahme, diese Felder existieren in Ihrer Entität
            }).ToList();
        }

        public async Task<ShippingMethodDto?> GetByIdAsync(Guid id)
        {
            var sm = await _shippingMethodRepository.GetByIdAsync(id);
            if (sm == null) return null;

            return new ShippingMethodDto
            {
                Id = sm.Id,
                Name = sm.Name,
                Description = sm.Description,
                Cost = sm.BaseCost,
                IsActive = sm.IsActive
            };
        }

        public async Task<ShippingMethodDto> CreateAsync(ShippingMethodDto shippingMethodDto)
        {
            var newMethod = new ShippingMethod
            {
                Id = Guid.NewGuid(),
                Name = shippingMethodDto.Name,
                Description = shippingMethodDto.Description,
                BaseCost = shippingMethodDto.Cost,
                IsActive = shippingMethodDto.IsActive
            };

            await _shippingMethodRepository.AddAsync(newMethod);
            shippingMethodDto.Id = newMethod.Id;
            return shippingMethodDto;
        }

        public async Task<bool> UpdateAsync(ShippingMethodDto shippingMethodDto)
        {
            var existingMethod = await _shippingMethodRepository.GetByIdAsync(shippingMethodDto.Id);
            if (existingMethod == null) return false;

            existingMethod.Name = shippingMethodDto.Name;
            existingMethod.Description = shippingMethodDto.Description;
            existingMethod.BaseCost = shippingMethodDto.Cost;
            existingMethod.IsActive = shippingMethodDto.IsActive;

            await _shippingMethodRepository.UpdateAsync(existingMethod);
            return true;
        }

        public async Task<bool> DeleteAsync(Guid id)
        {
            var method = await _shippingMethodRepository.GetByIdAsync(id);
            if (method == null) return false;

            await _shippingMethodRepository.DeleteAsync(id);
            return true;
        }
    }
}