CLI args to pick mode

src/main.rs

@@ -1,6 +1,7 @@
 use blackjack::card::Card;
 use blackjack::game::{Game, PlayResult, PlayerChoice};
 use blackjack::hand::Hand;
+use clap::{Parser, ValueEnum};
 use console::Term;
 use std::env;
 use std::fs;
@@ -10,9 +11,25 @@ use std::path::{Path, PathBuf};
 
 fn main() {
     // TODO: Use anyhow for error handling, get rid of unwraps
-    // TODO: CLI flags to choose how to play
-    interactive_play();
-    // old_man();
+    let args = Args::parse();
+    println!("{:?}", args);
+    match args.mode {
+        Mode::Interactive => interactive_play(),
+        Mode::OldMan => old_man(),
+    }
+}
+
+#[derive(ValueEnum, Clone, Debug)]
+enum Mode {
+    Interactive,
+    OldMan,
+}
+
+#[derive(Parser, Debug)]
+#[command(version, about)]
+struct Args {
+    #[arg(long, default_value = "interactive")]
+    mode: Mode,
 }
 
 fn interactive_play() {