From d9f1fe513e6f7696809d3a9b4d44ca485fe99c97 Mon Sep 17 00:00:00 2001
From: salmonik <salmonik@tuta.io>
Date: Thu, 29 Oct 2026 17:18:34 +0100
Subject: v2.1.0: add European roulette with split bets and wheel animation

---
 src/bin/client/repl.rs | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)

(limited to 'src/bin')

diff --git a/src/bin/client/repl.rs b/src/bin/client/repl.rs
index 1ed3073..e028cc2 100644
--- a/src/bin/client/repl.rs
+++ b/src/bin/client/repl.rs
@@ -20,6 +20,7 @@ use zagan_bet::client::ui::{
     visual_line_count,
 };
 use zagan_bet::protocol::io_failure_message;
+use zagan_bet::roulette::WHEEL;
 
 use crate::connection::TlsStream;
 
@@ -150,6 +151,16 @@ impl ClientState {
                     }
                 }
                 Effect::ReplaceRegion(lines) => self.draw_region(&lines),
+                Effect::AnimateRoulette {
+                    winning,
+                    final_lines,
+                } => {
+                    self.animate_wheel(winning);
+                    self.draw_region(&final_lines);
+                    while crossterm::event::poll(std::time::Duration::ZERO).unwrap_or(false) {
+                        let _ = crossterm::event::read();
+                    }
+                }
                 Effect::ClearRegion => self.clear_region(),
                 Effect::SetPrompt { text, cursor_col } => self.draw_prompt(&text, cursor_col),
                 Effect::SendLine(line) => {
@@ -276,6 +287,49 @@ impl ClientState {
         self.game_lines = 0;
     }
 
+    /// CS:GO-style wheel strip: the ball marker is fixed and the numbers move
+    /// left-to-right under it, ending with the winning number in the center.
+    fn animate_wheel(&mut self, winning: u8) {
+        use std::thread;
+        use std::time::Duration;
+
+        let target = WHEEL
+            .iter()
+            .position(|number| *number == winning)
+            .unwrap_or(0) as f64;
+        let wheel_len = WHEEL.len() as f64;
+        let start = target - 4.0 * wheel_len - 7.0;
+        let frames = 32;
+
+        for frame in 0..frames {
+            let t = frame as f64 / (frames - 1) as f64;
+            let ease = 1.0 - (1.0 - t).powi(3);
+            let center = (start + (target - start) * ease).round() as isize;
+
+            let strip = (0..9)
+                .map(|offset| {
+                    let index = (center - 4 + offset).rem_euclid(WHEEL.len() as isize) as usize;
+                    format!("[ {:>2} ]", WHEEL[index])
+                })
+                .collect::<Vec<_>>()
+                .join(" ");
+            let marker = format!("{}▼", " ".repeat(4 * 7 + 3));
+            let lines = vec![
+                "=== ROULETTE ===".to_string(),
+                strip,
+                marker,
+                "Spinning...".to_string(),
+            ];
+
+            self.draw_region(&lines);
+            thread::sleep(Duration::from_millis(35));
+        }
+
+        // Let the winning number sit under the static ball before the result
+        // board replaces the wheel.
+        thread::sleep(Duration::from_millis(450));
+    }
+
     fn draw_prompt(&mut self, text: &str, cursor_col: u16) {
         execute!(stdout(), MoveToColumn(0), Clear(ClearType::CurrentLine)).unwrap();
         print!("{}", "> ".cyan());
-- 
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