diff --git a/import_nginx_waf.py b/import_nginx_waf.py
index 8d99954..f647d92 100644
--- a/import_nginx_waf.py
+++ b/import_nginx_waf.py
@@ -1,42 +1,114 @@
 import os
 import subprocess
 import logging
+from pathlib import Path
 
-logging.basicConfig(level=logging.INFO, format="%(asctime)s - %(levelname)s - %(message)s")
+# Configure logging
+logging.basicConfig(
+    level=logging.INFO,
+    format="%(asctime)s - %(levelname)s - %(message)s",
+    handlers=[logging.StreamHandler()],
+)
+
+# Constants (configurable via environment variables)
+WAF_DIR = Path(os.getenv("WAF_DIR", "waf_patterns/nginx"))  # Source directory for WAF files
+NGINX_WAF_DIR = Path(os.getenv("NGINX_WAF_DIR", "/etc/nginx/waf/"))  # Target directory
+NGINX_CONF = Path(os.getenv("NGINX_CONF", "/etc/nginx/nginx.conf"))  # Nginx config file
+INCLUDE_STATEMENT = "include /etc/nginx/waf/*.conf;"  # Include directive
 
-WAF_DIR = "waf_patterns/nginx"
-NGINX_WAF_DIR = "/etc/nginx/waf/"
-NGINX_CONF = "/etc/nginx/nginx.conf"
-INCLUDE_STATEMENT = "include /etc/nginx/waf/*.conf;"
 
 def copy_waf_files():
+    """
+    Copy Nginx WAF configuration files to the target directory.
+    """
     logging.info("Copying Nginx WAF patterns...")
-    os.makedirs(NGINX_WAF_DIR, exist_ok=True)
-    list_of_files = os.listdir(WAF_DIR)
-    for conf_file in list_of_files:
-        if conf_file.endswith('.conf'):
-            subprocess.run(["cp", f"{WAF_DIR}/{conf_file}", NGINX_WAF_DIR], check=True)
+
+    try:
+        # Ensure the target directory exists
+        NGINX_WAF_DIR.mkdir(parents=True, exist_ok=True)
+        logging.info(f"[+] Created or verified directory: {NGINX_WAF_DIR}")
+
+        # Copy .conf files from source to target directory
+        for conf_file in WAF_DIR.glob("*.conf"):
+            dst_path = NGINX_WAF_DIR / conf_file.name
+
+            if dst_path.exists():
+                logging.warning(f"[!] File already exists: {dst_path}")
+                continue
+
+            try:
+                subprocess.run(["cp", str(conf_file), str(dst_path)], check=True)
+                logging.info(f"[+] Copied {conf_file} to {NGINX_WAF_DIR}")
+            except subprocess.CalledProcessError as e:
+                logging.error(f"[!] Failed to copy {conf_file}: {e}")
+                raise
+    except Exception as e:
+        logging.error(f"[!] Error copying WAF files: {e}")
+        raise
+
 
 def update_nginx_conf():
+    """
+    Ensure the WAF include statement is present in the Nginx configuration file.
+    """
     logging.info("Ensuring WAF patterns are included in nginx.conf...")
 
-    with open(NGINX_CONF, "r") as f:
-        config = f.read()
+    try:
+        # Read the current configuration
+        with open(NGINX_CONF, "r") as f:
+            config = f.read()
+
+        # Append include statement if not present
+        if INCLUDE_STATEMENT not in config:
+            logging.info("Adding WAF include to nginx.conf...")
+            with open(NGINX_CONF, "a") as f:
+                f.write(f"\n{INCLUDE_STATEMENT}\n")
+            logging.info("[+] WAF include statement added to nginx.conf.")
+        else:
+            logging.info("WAF already included in nginx.conf.")
+    except Exception as e:
+        logging.error(f"[!] Error updating Nginx configuration: {e}")
+        raise
 
-    if INCLUDE_STATEMENT not in config:
-        logging.info("Adding WAF include to nginx.conf...")
-        with open(NGINX_CONF, "a") as f:
-            f.write(f"\n{INCLUDE_STATEMENT}\n")
-    else:
-        logging.info("WAF already included in nginx.conf.")
 
 def reload_nginx():
+    """
+    Reload Nginx to apply the new WAF rules.
+    """
     logging.info("Reloading Nginx to apply new WAF rules...")
-    subprocess.run(["nginx", "-t"], check=True)
-    subprocess.run(["systemctl", "reload", "nginx"], check=True)
+
+    try:
+        # Test Nginx configuration
+        subprocess.run(["nginx", "-t"], check=True)
+        logging.info("[+] Nginx configuration test passed.")
+
+        # Reload Nginx
+        subprocess.run(["systemctl", "reload", "nginx"], check=True)
+        logging.info("[+] Nginx reloaded successfully.")
+    except subprocess.CalledProcessError as e:
+        logging.error(f"[!] Nginx configuration test failed: {e}")
+        raise
+    except FileNotFoundError:
+        logging.error("[!] 'nginx' or 'systemctl' command not found. Are you on a supported system?")
+        raise
+    except Exception as e:
+        logging.error(f"[!] Error reloading Nginx: {e}")
+        raise
+
+
+def main():
+    """
+    Main function to execute the script.
+    """
+    try:
+        copy_waf_files()
+        update_nginx_conf()
+        reload_nginx()
+        logging.info("[✔] Nginx configured with latest WAF rules.")
+    except Exception as e:
+        logging.critical(f"[!] Script failed: {e}")
+        exit(1)
+
 
 if __name__ == "__main__":
-    copy_waf_files()
-    update_nginx_conf()
-    reload_nginx()
-    logging.info("[✔] Nginx configured with latest WAF rules.")
+    main()