import java.net.URI;
import java.net.URLEncoder;
import java.net.http.*;
import java.nio.charset.StandardCharsets;
import java.time.Duration;
import java.util.Base64;

class SessionResult {
    static String required(String name) {
        String value = System.getenv(name);
        if (value == null || value.isEmpty()) throw new IllegalArgumentException("Set " + name);
        return value;
    }
    static String quote(String value) {
        StringBuilder result = new StringBuilder("\"");
        for (char c : value.toCharArray()) {
            if (c == '"' || c == '\\') result.append('\\').append(c);
            else if (c < 32) result.append(String.format("\\u%04x", (int)c));
            else result.append(c);
        }
        return result.append('"').toString();
    }
    public static void main(String[] args) throws Exception {
        String authorization = "Basic " + Base64.getEncoder().encodeToString(
            (required("SCORMBOX_API_KEY") + ":" + required("SCORMBOX_API_SECRET")).getBytes(StandardCharsets.UTF_8));
        String course_path = "https://scormbox.com/api/v1/courses/" +
            URLEncoder.encode(required("SCORMBOX_COURSE_ID"), StandardCharsets.UTF_8);
        String email = required("SCORMBOX_LEARNER_EMAIL");
        String payload = "{\"user\":{\"name\":" + quote(required("SCORMBOX_LEARNER_NAME")) +
            ",\"email\":" + quote(email) + "},\"origin\":" + quote(required("SCORMBOX_ORIGIN")) +
            ",\"attempt_mode\":\"resume\"}";
        HttpClient client = HttpClient.newBuilder().connectTimeout(Duration.ofSeconds(20))
            .followRedirects(HttpClient.Redirect.NEVER).build();
        HttpRequest create = HttpRequest.newBuilder(URI.create(course_path + "/sessions"))
            .timeout(Duration.ofSeconds(20)).header("Authorization", authorization)
            .header("Content-Type", "application/json").POST(HttpRequest.BodyPublishers.ofString(payload)).build();
        HttpResponse<String> session = client.send(create, HttpResponse.BodyHandlers.ofString());
        if (session.statusCode() < 200 || session.statusCode() >= 300)
            throw new IllegalStateException("SCORMBox HTTP " + session.statusCode());
        // Deliver only the parsed launch_token to this learner's authorized browser page; do not log session.body().
        HttpRequest read = HttpRequest.newBuilder(URI.create(course_path + "/results?email=" +
            URLEncoder.encode(email, StandardCharsets.UTF_8))).timeout(Duration.ofSeconds(20))
            .header("Authorization", authorization).GET().build();
        HttpResponse<String> result = client.send(read, HttpResponse.BodyHandlers.ofString());
        if (result.statusCode() < 200 || result.statusCode() >= 300)
            throw new IllegalStateException("SCORMBox HTTP " + result.statusCode());
        System.out.println(result.body());
    }
}