@RestController
@RequestMapping(UserController.USER_CONTROLLER_BASIC_URL)
public class UserController {

    public static final String USER_CONTROLLER_BASIC_URL = "/api/v1/users";

    private final UserService userService;
    private final ProductService productService;
    private final ShoppingCartService shoppingCartService;

    @Autowired
    public UserController(UserService userService, ProductService productService, ShoppingCartService shoppingCartService) {
        this.userService = userService;
        this.productService = productService;
        this.shoppingCartService = shoppingCartService;
    }

    @GetMapping
    @ResponseStatus(HttpStatus.OK)
    public UserListDTO getListOfUsers() {

        return userService.getAllUsers();
    }

    @GetMapping("/{id}")
    @ResponseStatus(HttpStatus.OK)
    public UserDTO getUserById(@PathVariable Long id) {

        return userService.getUserById(id);
    }

    @PostMapping
    @ResponseStatus(HttpStatus.CREATED)
    public UserDTO createNewUser(@RequestBody @Valid UserDTO userDTO) {

       return userService.createNewUser(userDTO);
    }

    @PutMapping("/{id}")
    @ResponseStatus(HttpStatus.OK)
    public UserDTO updateUser(@PathVariable Long id, @RequestBody @Valid UserDTO userDTO) {

        return userService.updateUser(id, userDTO);
    }

    @PatchMapping("/{id}")
    @ResponseStatus(HttpStatus.OK)
    public UserDTO patchUser(@PathVariable Long id, @RequestBody @Valid UserDTO userDTO) {

        return userService.patchUser(id, userDTO);
    }

    @DeleteMapping("/{id}")
    @ResponseStatus(HttpStatus.OK)
    public void deleteUserById(@PathVariable Long id) {

        userService.deleteUserById(id);
    }

    @GetMapping("/{id}/shoppingCarts")  //todo refactor this to retrieve All shopping Carts
    @ResponseStatus(HttpStatus.OK)
    public ShoppingCartDTO getListOfAllShoppingCarts(@PathVariable Long id) {

        return userService.getUserById(id).getShoppingCartDTO();    //todo update it to pass a list ( after auditing problem)
    }

    @PostMapping("/{id}/shoppingCarts")
    @ResponseStatus(HttpStatus.CREATED)
    public ShoppingCartDTO addNewShoppingCart(@PathVariable Long id,  @RequestBody @Valid  ShoppingCartDTO shoppingCartDTO) {

        shoppingCartDTO.setUserDTO(userService.getUserById(id));
        ShoppingCartDTO savedShoppingCard = shoppingCartService.createNewShoppingCart(shoppingCartDTO);

        userService.getUserById(id).setShoppingCartDTO(savedShoppingCard);    //todo add exception for already active cart
        return savedShoppingCard;
    }

    @GetMapping("/{id}/products")
    @ResponseStatus(HttpStatus.OK)
    public ProductListDTO getListOfAllUsersProducts(@PathVariable Long id) {

        return new ProductListDTO(userService.getUserById(id).getProductDTOs());
    }

    @PostMapping("/{id}/products")
    @ResponseStatus(HttpStatus.CREATED)
    public ProductDTO addNewProductToUser(@PathVariable Long id, @RequestBody @Valid ProductDTO productDTO) {

        productDTO.setUserDTO( userService.getUserById(id));

        ProductDTO savedProductDTO = productService.createNewProduct(productDTO);

        userService.getUserById(id).getProductDTOs().add(savedProductDTO);
        userService.saveUser(userService.getUserById(id));

        return savedProductDTO;
    }
}