From cc2b69f31844bc4967106ec85825d007f6a32c2c Mon Sep 17 00:00:00 2001
From: Scott Worley <scottworley@scottworley.com>
Date: Mon, 17 Jul 2023 17:12:50 -0700
Subject: [PATCH] Command line interface to simulator

---
 src/lib.rs  | 17 +++++++++++++----
 src/main.rs | 39 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 52 insertions(+), 4 deletions(-)
 create mode 100644 src/main.rs

diff --git a/src/lib.rs b/src/lib.rs
index 59a47a9..0ad69ea 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -178,7 +178,6 @@ impl Hand {
     fn len(&self) -> usize {
         self.cards.len()
     }
-    #[cfg(test)]
     fn random(&self) -> Option<&Card> {
         self.cards.choose(&mut rand::thread_rng())
     }
@@ -204,6 +203,7 @@ pub enum Phase {
     Momentum,
 }
 
+#[derive(Debug)]
 pub enum GameOutcome {
     Loss,
     Win,
@@ -395,9 +395,18 @@ impl Default for Game {
 }
 
 pub struct Player(Box<dyn FnMut(&Game) -> Play>);
+impl Player {
+    #[must_use]
+    pub fn new<T>(f: T) -> Self
+    where
+        T: FnMut(&Game) -> Play + 'static,
+    {
+        Self(Box::new(f))
+    }
+}
 
-#[cfg(test)]
-fn random_player(game: &Game) -> Play {
+#[must_use]
+pub fn random_player(game: &Game) -> Play {
     match game.phase {
         Phase::Play => Play::Play(
             *game
@@ -491,7 +500,7 @@ mod tests {
     #[test]
     fn test_game() {
         for num_players in 1..10 {
-            let players: Vec<_> = std::iter::from_fn(|| Some(Player(Box::new(random_player))))
+            let players: Vec<_> = std::iter::from_fn(|| Some(Player::new(random_player)))
                 .take(num_players)
                 .collect();
             let mut game = Game::default();
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..172d58e
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,39 @@
+use clap::{Parser, Subcommand};
+use pluta_lesnura::{play, random_player, Game, Player};
+
+#[derive(Parser)]
+#[command(author, version, about, long_about = None, arg_required_else_help = true)]
+struct Cli {
+    #[command(subcommand)]
+    command: Option<Commands>,
+}
+
+#[derive(Subcommand)]
+enum Commands {
+    /// Runs simulations
+    Sim {
+        /// How many players?
+        #[arg(short, long)]
+        num_players: usize,
+    },
+}
+
+fn main() -> Result<(), &'static str> {
+    let cli = Cli::parse();
+
+    match &cli.command {
+        Some(Commands::Sim { num_players }) => {
+            let players: Vec<_> = std::iter::from_fn(|| Some(Player::new(random_player)))
+                .take(*num_players)
+                .collect();
+            let mut game = Game::default();
+            for _ in 0..*num_players {
+                game.add_player();
+            }
+            let result = play(game, players)?;
+            println!("Result: {result:?}");
+            Ok(())
+        }
+        None => unreachable!(),
+    }
+}
-- 
2.44.1