@RestController
public class HelloWorldController {
    // GET

    // /hello-world(endpoint)
    // @RequestMapping(method=RequestMethod.GET, path="/hello-world")
    @GetMapping(path="/hello-world")
    public String helloWorld(){
        return "Hello World";
    }


    @GetMapping(path="/hello-world-bean")
    public HelloWorldBean helloWorldBean(){
        return new HelloWorldBean("Hello World");
        //자바 빈 형태로 주면 json형태로 줄 것.
        //responsebody 안 넣더라도 RestController로 인해 자동으로 json으로 넣어져 들어간다.
    }

    @GetMapping(path="/hello-world-bean/path-variable/{name}")
    public HelloWorldBean helloWorldBean(@PathVariable String name){
      return new HelloWorldBean(String.format("Hello World, %s", name));
  }
}

    @PostMapping("/users")
    public void createUser(@RequestBody User user){
        //json이나 xml 같은걸 전달하기 위해 매개변수 타입에 지금 전달받는게 RequestBody 을 선언해야 한다.
        User savedUser = service.save(user);
    }

@RestController
@ControllerAdvice   //이게 있어야 상태창에 제대로 설정한 대로 보인다.
public class CustomizedResponseEntityExceptionHandler extends ResponseEntityExceptionHandler {
    @ExceptionHandler(Exception.class)
    public final ResponseEntity<Object> handleAllExceptions(Exception ex, WebRequest request){
        ExceptionResponse exceptionResponse =
                new ExceptionResponse(new Date(), ex.getMessage(), request.getDescription(false));

        return new ResponseEntity(exceptionResponse, HttpStatus.INTERNAL_SERVER_ERROR);//500 에러
    }
    @ExceptionHandler(UserNotFoundException.class)
    public final ResponseEntity<Object> handleUserNotFoundExceptions(Exception ex, WebRequest request){
        ExceptionResponse exceptionResponse =
                new ExceptionResponse(new Date(), ex.getMessage(), request.getDescription(false));

        return new ResponseEntity(exceptionResponse, HttpStatus.NOT_FOUND); //404 에러
    }
}

@DeleteMapping("/users/{id}")
    public void deleteUser(@PathVariable int id) {
        User user = service.deleteById(id);

        if (user == null) {
            throw new UserNotFoundException(String.format("ID[%s] not found", id));
        }
    }

@GetMapping(path="/hello-world-internationalized")
   public String helloWorldInternationalized(
           @RequestHeader (name="Accept-Language", required=false) Locale locale){
    //이건 앞에 설명한 language란 헤더값이 포함 안되면 디폴트 값(한국어)가 들어감
    //메시지 값 반환하기 위해 메시지 소스를 만들자.(맨위)

   }

@GetMapping(path="/hello-world-internationalized")
    public String helloWorldInternationalized(
            @RequestHeader (name="Accept-Language", required=false) Locale locale){
     //이건 앞에 설명한 language란 헤더값이 포함 안되면 디폴트 값(한국어)가 들어감
     //메시지 값 반환하기 위해 메시지 소스를 만들자.(맨위)
        return messageSource.getMessage("greeting.message",null, locale);
    }

@JsonIgnoreProperties(value={"password","ssn"})
public class User {
    private Integer id;

    @Size (min=2, message = "2글자 이상 입력해주세요")
    private String name;
    @Past   //현재 미래는 못오고 과거만 오게.
    private Date joinDate;

//    @JsonIgnore
    private String password;
//    @JsonIgnore //이걸 넣어주면 json넣어줄떄 무시된다.
    private String ssn;
}

@RestController
@RequestMapping("/admin")
public class AdminUserController {
    private UserDaoService service;

    public AdminUserController(UserDaoService service) {
        this.service = service;
    }

    @GetMapping("/users")
    public MappingJacksonValue retrieveAllUsers() {
        List<User> users = service.findAll();

        SimpleBeanPropertyFilter filter = SimpleBeanPropertyFilter
                .filterOutAllExcept("id", "name", "joinDate", "password");

        FilterProvider filters = new SimpleFilterProvider().addFilter("UserInfo", filter);

        MappingJacksonValue mapping = new MappingJacksonValue(users);
        mapping.setFilters(filters);

        return mapping;
    }

    // GET /admin/users/1 -> /admin/v1/users/1
//    @GetMapping("/v1/users/{id}")
//    @GetMapping(value = "/users/{id}/", params = "version=1")
//    @GetMapping(value = "/users/{id}", headers="X-API-VERSION=1")
    @GetMapping(value = "/users/{id}", produces = "application/vnd.company.appv1+json")
    public MappingJacksonValue retrieveUserV1(@PathVariable int id) {
        User user = service.findOne(id);

        if (user == null) {
            throw new UserNotFoundException(String.format("ID[%s] not found", id));
        }

        SimpleBeanPropertyFilter filter = SimpleBeanPropertyFilter
                .filterOutAllExcept("id", "name", "password", "ssn");

        FilterProvider filters = new SimpleFilterProvider().addFilter("UserInfo", filter);

        MappingJacksonValue mapping = new MappingJacksonValue(user);
        mapping.setFilters(filters);

        return mapping;
    }

    //    @GetMapping("/v2/users/{id}")
//    @GetMapping(value = "/users/{id}/", params = "version=2")
//    @GetMapping(value = "/users/{id}", headers="X-API-VERSION=2")
    @GetMapping(value = "/users/{id}", produces = "application/vnd.company.appv2+json")
    public MappingJacksonValue retrieveUserV2(@PathVariable int id) {
        User user = service.findOne(id);

        if (user == null) {
            throw new UserNotFoundException(String.format("ID[%s] not found", id));
        }

        // User -> UserV2
        UserV2 userV2 = new UserV2();
        BeanUtils.copyProperties(user, userV2); // id, name, joinDate, password, ssn
        userV2.setGrade("VIP");

        SimpleBeanPropertyFilter filter = SimpleBeanPropertyFilter
                .filterOutAllExcept("id", "name", "joinDate", "grade");

        FilterProvider filters = new SimpleFilterProvider().addFilter("UserInfoV2", filter);

        MappingJacksonValue mapping = new MappingJacksonValue(userV2);
        mapping.setFilters(filters);

        return mapping;
    }
}