ShopSolution-backend/Webshop.Api/Controllers/Customers/CartController.cs

using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using System;
using System.Security.Claims;
using System.Threading.Tasks;
using Webshop.Application;
using Webshop.Application.DTOs.Customers; // Für CartDto
using Webshop.Application.DTOs.Shipping;  // Für CartItemDto
using Webshop.Application.Services.Customers.Interfaces;

namespace Webshop.Api.Controllers.Customer
{
    [ApiController]
    [Route("api/v1/customer/[controller]")]
    [Authorize(Roles = "Customer")]
    public class CartController : ControllerBase // <--- WICHTIG: Muss public sein und erben
    {
        private readonly ICartService _cartService;

        public CartController(ICartService cartService)
        {
            _cartService = cartService;
        }

        [HttpGet]
        [ProducesResponseType(typeof(CartDto), StatusCodes.Status200OK)]
        public async Task<IActionResult> GetCart()
        {
            var userId = User.FindFirstValue(ClaimTypes.NameIdentifier);
            var result = await _cartService.GetCartAsync(userId!);
            return Ok(result.Value);
        }

        [HttpPost("items")]
        [ProducesResponseType(StatusCodes.Status200OK)]
        [ProducesResponseType(typeof(string), StatusCodes.Status400BadRequest)]
        public async Task<IActionResult> AddToCart([FromBody] CartItemDto item)
        {
            var userId = User.FindFirstValue(ClaimTypes.NameIdentifier);
            var result = await _cartService.AddToCartAsync(userId!, item);
            return result.Type == ServiceResultType.Success ? Ok() : BadRequest(new { Message = result.ErrorMessage });
        }

        [HttpDelete("items/{productId}")]
        [ProducesResponseType(StatusCodes.Status204NoContent)]
        public async Task<IActionResult> RemoveItem(Guid productId)
        {
            var userId = User.FindFirstValue(ClaimTypes.NameIdentifier);
            await _cartService.RemoveFromCartAsync(userId!, productId);
            return NoContent();
        }
    }
}