package sn.ladoum.bergerie.exception;

import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.security.authentication.BadCredentialsException;
import org.springframework.security.authentication.DisabledException;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@RestControllerAdvice
public class GlobalExceptionHandler {

    @ExceptionHandler(ResourceNotFoundException.class)
    public ResponseEntity<Map<String, Object>> handleNotFound(ResourceNotFoundException ex) {
        return build(HttpStatus.NOT_FOUND, ex.getMessage());
    }

    @ExceptionHandler(IllegalArgumentException.class)
    public ResponseEntity<Map<String, Object>> handleBadRequest(IllegalArgumentException ex) {
        return build(HttpStatus.BAD_REQUEST, ex.getMessage());
    }

    @ExceptionHandler(AccessDeniedException.class)
    public ResponseEntity<Map<String, Object>> handleForbidden(AccessDeniedException ex) {
        return build(HttpStatus.FORBIDDEN, ex.getMessage());
    }

    @ExceptionHandler(DisabledException.class)
    public ResponseEntity<Map<String, Object>> handleDisabled(DisabledException ex) {
        return build(HttpStatus.FORBIDDEN,
                "Votre compte est bloqué. Contactez l'administrateur pour l'activer.");
    }

    @ExceptionHandler(BadCredentialsException.class)
    public ResponseEntity<Map<String, Object>> handleBadCredentials(BadCredentialsException ex) {
        return build(HttpStatus.UNAUTHORIZED, "Email ou mot de passe incorrect.");
    }

    @ExceptionHandler(MethodArgumentNotValidException.class)
    public ResponseEntity<Map<String, Object>> handleValidation(MethodArgumentNotValidException ex) {
        Map<String, String> errors = new HashMap<>();
        ex.getBindingResult().getFieldErrors().forEach(err ->
                errors.put(err.getField(), err.getDefaultMessage()));
        Map<String, Object> body = baseBody(HttpStatus.BAD_REQUEST, "Erreurs de validation");
        body.put("errors", errors);
        return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(body);
    }

    @ExceptionHandler(Exception.class)
    public ResponseEntity<Map<String, Object>> handleGeneric(Exception ex) {
        return build(HttpStatus.INTERNAL_SERVER_ERROR, ex.getMessage());
    }

    private ResponseEntity<Map<String, Object>> build(HttpStatus status, String message) {
        return ResponseEntity.status(status).body(baseBody(status, message));
    }

    private Map<String, Object> baseBody(HttpStatus status, String message) {
        Map<String, Object> body = new HashMap<>();
        body.put("timestamp", LocalDateTime.now());
        body.put("status", status.value());
        body.put("error", status.getReasonPhrase());
        body.put("message", message);
        return body;
    }
}