[HttpPost]
[Route("MoveFromWishlistToCart")]
public async Task<IActionResult> MoveFromWishlistToCart([FromBody] CartViewModel model)
{
    var userId = User.FindFirstValue("userId");

    if (userId == null)
    {
        return Unauthorized("User not logged in");
    }

    var member = await _context.Members.FirstOrDefaultAsync(m => m.User_ID == int.Parse(userId));
    if (member == null)
    {
        return Unauthorized("User is not a member");
    }

    var wishlist = await _context.Wishlists.FirstOrDefaultAsync(w => w.Member_ID == member.Member_ID);
    if (wishlist == null)
    {
        return NotFound("Wishlist not found");
    }

    var wishlistItem = await _context.Wishlist_Items
        .FirstOrDefaultAsync(w => w.Product_ID == model.Product_ID && w.Wishlist_ID == wishlist.Wishlist_ID);

    if (wishlistItem == null)
    {
        return NotFound("Product not found in the wishlist");
    }

    var cart = await _context.Carts.FirstOrDefaultAsync(c => c.Member_ID == member.Member_ID);
    if (cart == null)
    {
        cart = new Cart { Member_ID = member.Member_ID };
        _context.Carts.Add(cart);
        await _context.SaveChangesAsync();
    }

    var existingCartItem = await _context.Cart_Items
        .FirstOrDefaultAsync(c => c.Product_ID == model.Product_ID && c.Cart_ID == cart.Cart_ID);

    if (existingCartItem != null)
    {
        existingCartItem.Quantity += 1;
        _context.Cart_Items.Update(existingCartItem);
    }
    else
    {
        var cartItem = new Cart_Item
        {
            Product_ID = model.Product_ID,
            Quantity = 1,
            Cart_ID = cart.Cart_ID
        };

        _context.Cart_Items.Add(cartItem);
    }

    _context.Wishlist_Items.Remove(wishlistItem);

    await _context.SaveChangesAsync();

    return Content("Product moved from wishlist to cart", "text/plain");
}