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/client/games/roulette.rs | 157 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 157 insertions(+)
 create mode 100644 src/client/games/roulette.rs

(limited to 'src/client/games/roulette.rs')

diff --git a/src/client/games/roulette.rs b/src/client/games/roulette.rs
new file mode 100644
index 0000000..3379317
--- /dev/null
+++ b/src/client/games/roulette.rs
@@ -0,0 +1,157 @@
+use super::traits::{Game, GameState};
+use crate::roulette::{is_even, is_odd, Bets};
+
+pub const ROULETTE_BOARD_LINES: usize = 8;
+
+pub struct RouletteGame;
+
+impl RouletteGame {
+    pub fn new() -> Self {
+        Self
+    }
+
+    fn bets(state: &GameState) -> Bets {
+        state
+            .data
+            .get("bets")
+            .and_then(|raw| serde_json::from_str(raw).ok())
+            .unwrap_or_default()
+    }
+
+    fn bets_line(bets: &Bets) -> String {
+        let mut parts = Vec::new();
+        if bets.red > 0 {
+            parts.push(format!("RED {}", bets.red));
+        }
+        if bets.black > 0 {
+            parts.push(format!("BLACK {}", bets.black));
+        }
+        if bets.even > 0 {
+            parts.push(format!("EVEN {}", bets.even));
+        }
+        if bets.odd > 0 {
+            parts.push(format!("ODD {}", bets.odd));
+        }
+        for bet in &bets.numbers {
+            parts.push(format!("#{} {}", bet.number, bet.amount));
+        }
+
+        let list = if parts.is_empty() {
+            "(none)".to_string()
+        } else {
+            parts.join("  ")
+        };
+        format!("Bets: {}   Total: {} PLN", list, bets.total())
+    }
+
+    fn result_lines(state: &GameState) -> (String, String) {
+        if let Some(error) = state.data.get("error") {
+            if !error.is_empty() {
+                return (format!("ERROR: {error}"), String::new());
+            }
+        }
+
+        match state.data.get("status").map(String::as_str) {
+            Some("result") => {
+                let number = state
+                    .data
+                    .get("number")
+                    .map(String::as_str)
+                    .unwrap_or("?");
+                let color = state
+                    .data
+                    .get("color")
+                    .map(|value| value.to_uppercase())
+                    .unwrap_or_default();
+                let parity = number
+                    .parse::<u8>()
+                    .ok()
+                    .map(|number| {
+                        if is_even(number) {
+                            " EVEN"
+                        } else if is_odd(number) {
+                            " ODD"
+                        } else {
+                            ""
+                        }
+                    })
+                    .unwrap_or("");
+                let winnings = state
+                    .data
+                    .get("winnings")
+                    .map(String::as_str)
+                    .unwrap_or("0");
+                let result = if winnings == "0" {
+                    "No win.".to_string()
+                } else {
+                    format!("Won {winnings} PLN")
+                };
+                (format!("Winning: {number} {color}{parity}"), result)
+            }
+            Some("spinning") => ("Spinning...".to_string(), String::new()),
+            _ => ("Place bets, then SPACE to spin.".to_string(), String::new()),
+        }
+    }
+}
+
+impl Game for RouletteGame {
+    fn get_name(&self) -> &'static str {
+        "Roulette"
+    }
+
+    fn render(&self, state: &GameState) -> String {
+        let bets = Self::bets(state);
+        let chip = state.data.get("chip").map(String::as_str).unwrap_or("10");
+        let balance = state
+            .data
+            .get("balance")
+            .map(String::as_str)
+            .unwrap_or("?");
+        let input = state
+            .data
+            .get("number_input")
+            .map(String::as_str)
+            .unwrap_or("");
+        let input_line = if input.is_empty() {
+            String::new()
+        } else {
+            format!("Number: {input}_")
+        };
+        let (status, result) = Self::result_lines(state);
+
+        format!(
+            "=== ROULETTE ===\r\nBalance: {} PLN   Chip: {} PLN\r\n{}\r\n{}\r\n{}\r\n{}\r\n[R]ed [B]lack [E]ven [O]dd  [#]Number  [C]lear\r\n[+/-] Chip   [SPACE] Spin   [Q] Quit",
+            balance,
+            chip,
+            Self::bets_line(&bets),
+            input_line,
+            status,
+            result
+        )
+    }
+
+    fn render_lines(&self, _state: &GameState) -> usize {
+        ROULETTE_BOARD_LINES
+    }
+
+    fn get_help(&self) -> String {
+        "ROULETTE (European)\n\
+        ==================\n\
+        37 pockets: 0 plus 1-36. 0 is green and loses all outside bets.\n\
+        \n\
+        Betting:\n\
+        R / B / E / O - add the current chip to red/black/even/odd\n\
+        digits + Enter - add the current chip to that number\n\
+        C - clear all bets\n\
+        + or = / - - change the chip size\n\
+        SPACE - spin when at least one bet is placed\n\
+        Q - exit\n\
+        \n\
+        Payouts:\n\
+        straight number: 35:1 (36x returned)\n\
+        red/black: 1:1 (2x returned)\n\
+        even/odd: 1:1 (2x returned)\n\
+        Multiple bets are settled independently and added together."
+            .to_string()
+    }
+}
-- 
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