erp-imprimelibros/src/main/java/com/imprimelibros/erp/externalApi/AuthService.java

package com.imprimelibros.erp.externalApi;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.http.*;
import org.springframework.stereotype.Service;
import org.springframework.web.client.RestTemplate;

import java.util.Map;

@Service
public class AuthService {

    @Value("${safekat.api.url}")
    private String skApiUrl;
    @Value("${safekat.api.email}")
    private String skApiEmail;
    @Value("${safekat.api.password}")
    private String skApiPassword;

    private final RestTemplate restTemplate = new RestTemplate();
    private String currentToken;

    public synchronized String getToken() {
        if (currentToken == null) {
            currentToken = fetchNewToken();
        }
        return currentToken;
    }

    public synchronized void invalidateToken() {
        currentToken = null;
    }

    private String fetchNewToken() {
        Map<String, String> credentials = Map.of(
                "email", this.skApiEmail,
                "password", this.skApiPassword);
        ResponseEntity<Map> response = restTemplate.postForEntity(this.skApiUrl + "auth/jwt", credentials, Map.class);
        return (String) response.getBody().get("access_token");
    }
}