agent: config.rs — rename AgentConfig to RunOptions, add Clone, windows_service field, to_service_args()

agent/src/config.rs

@@ -1,14 +1,20 @@
-//! Agent configuration parsed from CLI arguments and environment variables.
+//! Agent run configuration — shared options for `run` and `service install`.
+//!
+//! This struct holds all the operational parameters for the Butterfly agent:
+//! server address, encoding, frame rate, quality, etc. It is used both when
+//! running in foreground mode (`butterfly-agent run`) and when embedding
+//! these options into a system service definition (`butterfly-agent service install`).
 
-use clap::Parser;
+use clap::Args;
 use std::time::Duration;
 
-/// Butterfly Desktop Agent — captures display from this machine and streams
-/// it to a Butterfly server. Also receives and executes HUD commands (mouse,
-/// keyboard) from remote viewers for full remote control.
-#[derive(Parser, Debug)]
-#[command(name = "butterfly-agent", version, about)]
-pub struct AgentConfig {
+/// Operational options for running the Butterfly agent.
+///
+/// These options control how the agent connects, captures, encodes, and streams.
+/// They are shared between foreground mode and service installation (the service
+/// definition embeds these options so the agent runs with the same configuration).
+#[derive(Args, Debug, Clone)]
+pub struct RunOptions {
     /// WebSocket URL of the Butterfly server.
     ///
     /// Example: ws://192.168.1.100:8080
@@ -52,14 +58,18 @@ pub struct AgentConfig {
     /// Maximum reconnection attempts (0 = infinite).
     #[arg(long, default_value_t = 0, env = "BUTTERFLY_MAX_RECONNECT")]
     pub max_reconnect: u32,
+
+    /// (Windows only, internal) Run as a Windows Service.
+    /// This flag is set automatically when the service installer registers the
+    /// agent with the Windows Service Control Manager. It should not be used
+    /// manually — the SCM uses it to signal that the agent should connect to
+    /// the service dispatcher instead of running in the foreground.
+    #[cfg(windows)]
+    #[arg(long, hide = true)]
+    pub windows_service: bool,
 }
 
-impl AgentConfig {
-    /// Parse configuration from CLI arguments.
-    pub fn parse_args() -> Self {
-        Self::parse()
-    }
-
+impl RunOptions {
     /// Duration between captured frames.
     pub fn frame_interval(&self) -> Duration {
         Duration::from_secs_f64(1.0 / self.fps as f64)
@@ -91,4 +101,45 @@ impl AgentConfig {
             self.server.replace("ws://", "http://").replace("wss://", "https://")
         )
     }
+
+    /// Build the command-line arguments vector for embedding in service definitions.
+    ///
+    /// Returns something like `["run", "--server", "ws://...", "--encoder", "h264", ...]`.
+    /// The "run" subcommand is included so the service knows to start in agent mode.
+    pub fn to_service_args(&self) -> Vec<String> {
+        let mut args = vec!["run".to_string()];
+
+        args.push(format!("--server={}", self.server));
+
+        if let Some(ref sid) = self.session_id {
+            args.push(format!("--session-id={}", sid));
+        }
+
+        if self.fps != 60 {
+            args.push(format!("--fps={}", self.fps));
+        }
+        if self.encoder != "h264" {
+            args.push(format!("--encoder={}", self.encoder));
+        }
+        if self.quality != 60 {
+            args.push(format!("--quality={}", self.quality));
+        }
+        if self.display != 0 {
+            args.push(format!("--display={}", self.display));
+        }
+        if self.audio {
+            args.push("--audio".to_string());
+        }
+        if self.heartbeat_secs != 15 {
+            args.push(format!("--heartbeat={}", self.heartbeat_secs));
+        }
+        if self.reconnect_delay_secs != 3 {
+            args.push(format!("--reconnect-delay={}", self.reconnect_delay_secs));
+        }
+        if self.max_reconnect != 0 {
+            args.push(format!("--max-reconnect={}", self.max_reconnect));
+        }
+
+        args
+    }
 }