diff --git a/app/logic/deployment_controller.py b/app/logic/deployment_controller.py
new file mode 100644
index 0000000..88710c9
--- /dev/null
+++ b/app/logic/deployment_controller.py
@@ -0,0 +1,149 @@
+import os
+import subprocess
+from datetime import datetime
+
+class DeploymentController:
+    def __init__(self, logger):
+        self.logger = logger
+        self.ssh_key = None
+        self.config_dir = None
+        self.remote_user = "ubuntu"
+        self.remote_host = "3.9.182.122"
+        self.certbot_email = "azeem.fidahusein@gmail.com"
+        self.remote_temp_dir = "nginx_deploy_temp"
+        self.dest_nginx_path = "/etc/nginx/"
+        self.dest_sites_path = "/etc/nginx/sites-available/"
+        self.source_nginx_conf = "nginx.conf"
+        self.source_sites_dir = "sites-available"
+        self.domains = []
+        self.config_files = []
+
+    def preflight_checks(self):
+        self.logger.log("Running pre-flight checks...")
+        if not self.ssh_key or not os.path.isfile(self.ssh_key):
+            self.logger.log("ERROR: SSH key not set or not found.")
+            return False
+        if not self.config_dir or not os.path.isdir(self.config_dir):
+            self.logger.log("ERROR: Config directory not set or not found.")
+            return False
+        nginx_conf = os.path.join(self.config_dir, self.source_nginx_conf)
+        sites_dir = os.path.join(self.config_dir, self.source_sites_dir)
+        if not os.path.isfile(nginx_conf):
+            self.logger.log(f"ERROR: nginx.conf not found in {self.config_dir}.")
+            return False
+        if not os.path.isdir(sites_dir):
+            self.logger.log(f"ERROR: sites-available not found in {self.config_dir}.")
+            return False
+        self.logger.log("Pre-flight checks passed.")
+        return True
+
+    def scan_domains(self):
+        self.logger.log("Scanning for domains in configs...")
+        sites_dir = os.path.join(self.config_dir, self.source_sites_dir)
+        self.config_files = [f for f in os.listdir(sites_dir) if os.path.isfile(os.path.join(sites_dir, f))]
+        domains = set()
+        for fname in self.config_files:
+            path = os.path.join(sites_dir, fname)
+            with open(path, 'r') as f:
+                for line in f:
+                    if 'server_name' in line:
+                        parts = line.split()
+                        if 'server_name' in parts:
+                            idx = parts.index('server_name')
+                            found = parts[idx+1:] if idx+1 < len(parts) else []
+                            for d in found:
+                                d = d.strip(';')
+                                if d:
+                                    domains.add(d)
+        self.domains = sorted(domains)
+        if self.domains:
+            self.logger.log(f"Found domains: {' '.join(self.domains)}")
+        else:
+            self.logger.log("WARNING: No domains found.")
+        return self.domains
+
+    def transfer_files(self):
+        self.logger.log("Transferring files to remote server...")
+        if not self.preflight_checks():
+            return False
+        ssh_key = self.ssh_key
+        temp_dir = self.remote_temp_dir
+        # Create temp dir on remote
+        cmd1 = ["ssh", "-i", ssh_key, f"{self.remote_user}@{self.remote_host}", f"mkdir -p {temp_dir}"]
+        self._run_cmd(cmd1, "Create remote temp dir")
+        # Copy nginx.conf
+        nginx_conf = os.path.join(self.config_dir, self.source_nginx_conf)
+        cmd2 = ["scp", "-i", ssh_key, nginx_conf, f"{self.remote_user}@{self.remote_host}:{temp_dir}/"]
+        self._run_cmd(cmd2, "Copy nginx.conf")
+        # Copy sites-available
+        sites_dir = os.path.join(self.config_dir, self.source_sites_dir)
+        cmd3 = ["scp", "-i", ssh_key, "-r", sites_dir, f"{self.remote_user}@{self.remote_host}:{temp_dir}/"]
+        self._run_cmd(cmd3, "Copy sites-available dir")
+        self.logger.log("File transfer complete.")
+        return True
+
+    def remote_ops(self):
+        self.logger.log("Moving transferred files to final destination, ensuring symlinks, and reloading Nginx...")
+        ssh_key = self.ssh_key
+        temp_dir = self.remote_temp_dir
+        config_files = ' '.join(self.config_files)
+        remote_script = f'''
+            sudo mv {temp_dir}/nginx.conf {self.dest_nginx_path}nginx.conf
+            sudo mv {temp_dir}/sites-available/* {self.dest_sites_path}
+            for CONFIG_FILE in {config_files}
+            do
+                SOURCE_FILE="/etc/nginx/sites-available/$CONFIG_FILE"
+                LINK_FILE="/etc/nginx/sites-enabled/$CONFIG_FILE"
+                if [ ! -L "$LINK_FILE" ]; then
+                    if [ -f "$SOURCE_FILE" ]; then
+                        sudo ln -s "$SOURCE_FILE" "$LINK_FILE"
+                    fi
+                fi
+            done
+            sudo nginx -t && sudo systemctl reload nginx
+        '''
+        cmd = ["ssh", "-i", ssh_key, f"{self.remote_user}@{self.remote_host}", remote_script]
+        self._run_cmd(cmd, "Move files, ensure symlinks, and reload Nginx")
+        self.logger.log("Remote file move, symlink check, and reload complete.")
+        return True
+
+    def run_certbot(self, prompt_fn=None):
+        if not self.domains:
+            self.logger.log("No domains found, skipping Certbot.")
+            return False
+        if prompt_fn:
+            proceed = prompt_fn("Run Certbot for the discovered domains? (y/n)")
+            if not proceed:
+                self.logger.log("Certbot step skipped by user.")
+                return False
+        self.logger.log("Running Certbot on remote server...")
+        ssh_key = self.ssh_key
+        domains_args = ' '.join([f"-d {d}" for d in self.domains])
+        certbot_cmd = f"sudo certbot --nginx --non-interactive --agree-tos --email {self.certbot_email} --redirect --expand {domains_args}"
+        cmd = ["ssh", "-t", "-i", ssh_key, f"{self.remote_user}@{self.remote_host}", certbot_cmd]
+        self._run_cmd(cmd, "Run Certbot")
+        self.logger.log("Certbot step complete.")
+        return True
+
+    def cleanup(self):
+        self.logger.log("Performing cleanup...")
+        ssh_key = self.ssh_key
+        temp_dir = self.remote_temp_dir
+        cmd = ["ssh", "-i", ssh_key, f"{self.remote_user}@{self.remote_host}", f"rm -rf {temp_dir}"]
+        self._run_cmd(cmd, "Cleanup remote temp dir")
+        self.logger.log("Cleanup complete.")
+        return True
+
+    def _run_cmd(self, cmd, desc):
+        self.logger.log(f"[CMD] {desc}: {' '.join(cmd)}")
+        try:
+            proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
+            out, err = proc.communicate()
+            if out:
+                self.logger.log(out.strip())
+            if err:
+                self.logger.log(err.strip())
+            if proc.returncode != 0:
+                self.logger.log(f"ERROR: Command failed with code {proc.returncode}")
+        except Exception as e:
+            self.logger.log(f"Exception running command: {e}")
diff --git a/app/logic/logger.py b/app/logic/logger.py
new file mode 100644
index 0000000..e1945f0
--- /dev/null
+++ b/app/logic/logger.py
@@ -0,0 +1,17 @@
+from datetime import datetime
+
+class Logger:
+    def __init__(self, log_widget=None, log_file_path="nginx_deploy_gui.log"):
+        self.log_widget = log_widget
+        self.log_file = open(log_file_path, "a")
+
+    def log(self, message):
+        timestamp = datetime.now().strftime("[%Y-%m-%d %H:%M:%S]")
+        full_message = f"{timestamp} {message}\n"
+        if self.log_widget:
+            self.log_widget.append(full_message)
+        self.log_file.write(full_message)
+        self.log_file.flush()
+
+    def close(self):
+        self.log_file.close()