package $package.presentation.rest;

import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.http.ResponseEntity;
import org.springframework.http.HttpStatus;
import org.springframework.web.server.ResponseStatusException;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.dao.DataIntegrityViolationException;

import $package.presentation.dto.ErrorResponse;

@RestControllerAdvice
public class GlobalExceptionHandler {

    @ExceptionHandler(MethodArgumentNotValidException.class)
    public ResponseEntity<ErrorResponse> handleValidationException(
            MethodArgumentNotValidException ex, org.springframework.web.context.request.WebRequest request) {
        String errors = ex.getBindingResult().getFieldErrors().stream()
                .map(f -> f.getField() + ": " + f.getDefaultMessage())
                .collect(java.util.stream.Collectors.joining(", "));

        ErrorResponse error = new ErrorResponse(
                HttpStatus.BAD_REQUEST.value(),
                "Validation Error",
                "Validation failed: " + errors,
                request.getDescription(false).replaceFirst("uri=", "")
        );
        return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(error);
    }

    @ExceptionHandler(ResponseStatusException.class)
    public ResponseEntity<ErrorResponse> handleResponseStatusException(
            ResponseStatusException ex, org.springframework.web.context.request.WebRequest request) {
        ErrorResponse error = new ErrorResponse(
            ex.getStatusCode().value(),
            ex.getStatusCode().toString(),
            ex.getReason(),
            request.getDescription(false).replaceFirst("uri=", "")
        );
        return new ResponseEntity<>(error, ex.getStatusCode());
    }

    @ExceptionHandler(DataIntegrityViolationException.class)
    public ResponseEntity<ErrorResponse> handleDataIntegrityViolation(
            DataIntegrityViolationException ex, org.springframework.web.context.request.WebRequest request) {
        ErrorResponse error = new ErrorResponse(
            HttpStatus.CONFLICT.value(),
            "Conflict",
            ex.getMostSpecificCause() != null ? ex.getMostSpecificCause().getMessage() : ex.getMessage(),
            request.getDescription(false).replaceFirst("uri=", "")
        );
        return ResponseEntity.status(HttpStatus.CONFLICT).body(error);
    }
}