package com.vaessl.app.exception;

import org.springframework.http.ProblemDetail;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.client.HttpClientErrorException;
import org.springframework.web.client.HttpServerErrorException;
import org.springframework.web.client.ResourceAccessException;

import static com.vaessl.app.exception.ErrorMessage.*;

import java.util.stream.Collectors;

@RestControllerAdvice
public class GlobalExceptionHandler {

    @ExceptionHandler(MethodArgumentNotValidException.class)
    public ProblemDetail handleEmptyCredentialInput(MethodArgumentNotValidException e) {

        String defaultMessages = e.getBindingResult().getFieldErrors().stream().map(FieldError::getDefaultMessage)
                .collect(Collectors.joining(", "));

        return ProblemDetail.forStatusAndDetail(BAD_REQUEST_EMPTY_FIELDS.getStatus(),
                BAD_REQUEST_EMPTY_FIELDS.getMessage() + " [" + defaultMessages + "]");
    }

    @ExceptionHandler(HttpClientErrorException.Unauthorized.class)
    public ProblemDetail handleUnauthorizedAccess(HttpClientErrorException e) {

        return ProblemDetail.forStatusAndDetail(UNAUTHORIZED_WRONG_LOGIN.getStatus(),
                UNAUTHORIZED_WRONG_LOGIN.getMessage());
    }

    @ExceptionHandler(ResourceAccessException.class)
    public ProblemDetail handleNoConnection(ResourceAccessException e) {

        return ProblemDetail.forStatusAndDetail(SERVICE_UNAVAILABLE_UNREACHABLE_URL.getStatus(),
                SERVICE_UNAVAILABLE_UNREACHABLE_URL.getMessage());
    }

    @ExceptionHandler(HttpServerErrorException.class)
    public ProblemDetail handleTimeoutOrNotFound(HttpServerErrorException e) {

        return ProblemDetail
                .forStatusAndDetail(e.getStatusCode(),
                        SERVER_ERROR_GENERAL.getMessage() + e.getStatusText());
    }

    @ExceptionHandler(EmptyCredentialsException.class)
    public ProblemDetail handleEmptyCredentials(EmptyCredentialsException e) {
        return ProblemDetail.forStatusAndDetail(BAD_REQUEST_EMPTY_FIELDS.getStatus(),
                BAD_REQUEST_EMPTY_FIELDS.getMessage() + " " + e.getMissingFields());
    }
}