From 2f2910dce2d45df8b016598d11fd766fb56a55ba Mon Sep 17 00:00:00 2001
From: Rhys Lloyd <krakow20@gmail.com>
Date: Sun, 17 May 2026 09:29:28 -0700
Subject: [PATCH] fini

---
 card_game/src/lib.rs     | 23 ++++++++++++++++++++---
 klondike-cli/src/main.rs | 15 ++++++++-------
 2 files changed, 28 insertions(+), 10 deletions(-)

diff --git a/card_game/src/lib.rs b/card_game/src/lib.rs
index df874bd..a894400 100644
--- a/card_game/src/lib.rs
+++ b/card_game/src/lib.rs
@@ -269,7 +269,7 @@ pub struct SessionState<G: Game> {
 impl<G: Game> Session<G>
 where
 	G: Clone + Eq + core::hash::Hash,
-	G::Stats: Clone,
+	G::Stats: Clone + Default,
 	G::Instruction: Clone + Eq + core::hash::Hash,
 {
 	pub fn new(state: G, stats: G::Stats, config: G::Config) -> Self {
@@ -288,17 +288,34 @@ where
 	}
 	pub fn new_default(state: G) -> Self
 	where
-		G::Stats: Default,
 		G::Config: Default,
 	{
 		Self::new(state, Default::default(), Default::default())
 	}
-	pub fn state(&self) -> &G {
+	pub const fn state(&self) -> &G {
 		&self.state.state
 	}
+	pub const fn config(&self) -> &G::Config {
+		&self.config
+	}
 	pub fn history(&self) -> &[G::Instruction] {
 		&self.state.history
 	}
+	pub fn undo(&mut self) {
+		self.state
+			.process_instruction(&mut self.stats, &self.config, SessionInstruction::Undo)
+	}
+	pub fn possible_instructions(&self) -> impl Iterator<Item = G::Instruction> + use<G> {
+		self.state.state.possible_instructions()
+	}
+	pub fn process_instruction(&mut self, instruction: G::Instruction) {
+		self.state
+			.state
+			.process_instruction(&mut self.stats.inner_stats, &self.config, instruction)
+	}
+	pub fn is_win(&self) -> bool {
+		self.state.is_win()
+	}
 	pub fn is_winnable(&self) -> Option<Vec<G::Instruction>> {
 		let mut observed = std::collections::HashSet::new();
 		struct StateMachine<G, P, I> {
diff --git a/klondike-cli/src/main.rs b/klondike-cli/src/main.rs
index 4c399f0..2b6d0af 100644
--- a/klondike-cli/src/main.rs
+++ b/klondike-cli/src/main.rs
@@ -1,7 +1,7 @@
 use card_game::{Card, CardValue, Game, Pile, Session, Suit};
 use klondike::{
-	DstFoundation, DstTableau, Foundation, Klondike, KlondikeInstruction, KlondikePile,
-	KlondikePileStack, SkipCards, Tableau, TableauStack,
+	DstFoundation, DstTableau, Foundation, Klondike, KlondikeConfig, KlondikeInstruction,
+	KlondikePile, KlondikePileStack, SkipCards, Tableau, TableauStack,
 };
 
 use std::fmt::Display;
@@ -144,6 +144,7 @@ impl core::str::FromStr for SessionInstruction {
 }
 
 fn find_valid_instruction(
+	config: &KlondikeConfig,
 	state: &Klondike,
 	naive_instruction: NaiveInstruction,
 ) -> Option<KlondikeInstruction> {
@@ -173,7 +174,7 @@ fn find_valid_instruction(
 						});
 						let instruction =
 							KlondikeInstruction::DstTableau(DstTableau { tableau, src });
-						if state.is_instruction_valid(instruction) {
+						if state.is_instruction_valid(config, instruction) {
 							return Some(instruction);
 						}
 					}
@@ -191,7 +192,7 @@ fn find_valid_instruction(
 		_ => return None,
 	};
 	state
-		.is_instruction_valid(instruction)
+		.is_instruction_valid(config, instruction)
 		.then_some(instruction)
 }
 
@@ -241,7 +242,7 @@ fn get_good_move(state: &Klondike) -> Option<KlondikeInstruction> {
 }
 
 fn main() -> Result<(), std::io::Error> {
-	let mut session = Session::new(Klondike::new_random());
+	let mut session = Session::new_default(Klondike::new_random());
 	let mut input = String::new();
 	loop {
 		// display game
@@ -257,7 +258,7 @@ fn main() -> Result<(), std::io::Error> {
 
 		// run game
 		match instruction {
-			SessionInstruction::New => session = Session::new(Klondike::new_random()),
+			SessionInstruction::New => session = Session::new_default(Klondike::new_random()),
 			SessionInstruction::Undo => session.undo(),
 			SessionInstruction::Exit => break Ok(()),
 			SessionInstruction::Hint => {
@@ -277,7 +278,7 @@ fn main() -> Result<(), std::io::Error> {
 			}
 			SessionInstruction::Klondike(naive_instruction) => {
 				if let Some(instruction) =
-					find_valid_instruction(session.state(), naive_instruction)
+					find_valid_instruction(session.config(), session.state(), naive_instruction)
 				{
 					session.process_instruction(instruction);
 				} else {