refactor: add arguments support to run client or server

app/src/main/java/clientserver/common/MistralDirectAPI.java

@@ -0,0 +1,58 @@
+package clientserver.common;
+
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.util.Properties;
+
+public class MistralDirectAPI {
+
+    public static void main(String[] args) {
+        String apiKey;
+
+        // Load API key from properties file
+        try {
+            Properties props = new Properties();
+            FileInputStream input = new FileInputStream("config.properties");
+            props.load(input);
+            apiKey = props.getProperty("mistral.api.key");
+            input.close();
+        } catch (IOException e) {
+            System.err.println("Could not load API key: " + e.getMessage());
+            return;
+        }
+
+        String payload =
+            """
+            {
+                "model": "mistral-medium",
+                "messages": [
+                    { "role": "user", "content": "Reverse turing test." }
+                ]
+            }
+            """;
+
+        HttpRequest request = HttpRequest.newBuilder()
+            .uri(URI.create("https://api.mistral.ai/v1/chat/completions"))
+            .header("Authorization", "Bearer " + apiKey)
+            .header("Content-Type", "application/json")
+            .POST(HttpRequest.BodyPublishers.ofString(payload))
+            .build();
+
+        HttpClient client = HttpClient.newHttpClient();
+
+        try {
+            HttpResponse<String> response = client.send(
+                request,
+                HttpResponse.BodyHandlers.ofString()
+            );
+            System.out.println("Response Code: " + response.statusCode());
+            System.out.println("Response Body: " + response.body());
+        } catch (IOException | InterruptedException e) {
+            System.err.println("Error occurred: " + e.getMessage());
+        }
+    }
+}