package com.example.notes;

import org.springframework.http.*;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.*;

import java.net.URI;
import java.util.stream.Collectors;

@RestControllerAdvice
public class ApiExceptionHandler {

    @ExceptionHandler(MethodArgumentNotValidException.class)
    public ProblemDetail handleValidation(MethodArgumentNotValidException ex) {
        String details = ex.getBindingResult().getFieldErrors().stream()
            .map(e -> e.getField() + ": " + e.getDefaultMessage())
            .collect(Collectors.joining("; "));

        ProblemDetail problem = ProblemDetail.forStatusAndDetail(
            HttpStatus.BAD_REQUEST, details);
        problem.setTitle("Validation failed");
        problem.setType(URI.create("about:blank"));
        return problem;
    }

    @ExceptionHandler(NoteNotFoundException.class)
    public ProblemDetail handleNotFound(NoteNotFoundException ex) {
        ProblemDetail problem = ProblemDetail.forStatusAndDetail(
            HttpStatus.NOT_FOUND, ex.getMessage());
        problem.setTitle("Not found");
        return problem;
    }
}