5 files changed, 392 insertions, 1 deletions

diff --git a/src/client/core.rs b/src/client/core.rs
index 77761b4..5f8c513 100644
--- a/src/client/core.rs
+++ b/src/client/core.rs
@@ -1,12 +1,14 @@
 use crate::client::games::manager::GameManager;
 use crate::client::games::response::{
-    parse_blackjack_response, parse_roulette_response, parse_spin_response,
+    parse_blackjack_response, parse_crash_response, parse_roulette_response, parse_spin_response,
 };
 use crate::client::ui::{
     command_names, completion_lines, display_width, help_lines, input_cursor_column,
     parse_bet_arg, record_history,
 };
+use crate::crash::{multiplier_at, CrashState};
 use crate::roulette::{Bets, NumberBet};
+use std::time::{Duration, Instant};
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum Key {
@@ -66,6 +68,9 @@ enum Pending {
     BlackjackStart,
     BlackjackAction,
     BlackjackForfeit,
+    CrashStart,
+    CrashCashout,
+    CrashForfeit,
     Ping,
     Echo,
     Info,
@@ -90,6 +95,8 @@ pub struct ClientCore {
     balance: Option<i64>,
     host: Option<String>,
     fingerprint: Option<String>,
+    /// Local anchor for the crash multiplier, set when a round starts.
+    crash_started: Option<Instant>,
 }
 
 impl ClientCore {
@@ -105,6 +112,7 @@ impl ClientCore {
             balance: None,
             host: None,
             fingerprint: None,
+            crash_started: None,
         }
     }
 
@@ -113,6 +121,7 @@ impl ClientCore {
         if !connected {
             self.logged_in = None;
             self.pending = None;
+            self.crash_started = None;
         }
     }
 
@@ -226,6 +235,49 @@ impl ClientCore {
                     self.board_effects()
                 }
             },
+            Some(Pending::CrashStart) => match parse_crash_response(reply) {
+                Ok(state) => self.apply_crash(state),
+                Err(message) => {
+                    self.game.set_error(message);
+                    self.board_effects()
+                }
+            },
+            Some(Pending::CrashCashout) => match parse_crash_response(reply) {
+                Ok(state) => self.apply_crash(state),
+                Err(message) => {
+                    // A pushed bust can settle the round before this reply
+                    // arrives. The late request must not overwrite the result.
+                    if self.game.crash_status() != "running" {
+                        return self.board_effects();
+                    }
+                    self.game.set_error(message);
+                    self.board_effects()
+                }
+            },
+            Some(Pending::CrashForfeit) => match parse_crash_response(reply) {
+                Ok(state) => {
+                    self.crash_started = None;
+                    self.game.end_game();
+                    let message = format!(
+                        "Game exited. Round forfeited ({} PLN lost).",
+                        state.bet
+                    );
+                    vec![Effect::ClearRegion, Effect::Print(vec![message])]
+                }
+                Err(_) if self.game.crash_status() != "running" => {
+                    // The round ended while the forfeit was in flight.
+                    self.crash_started = None;
+                    self.game.end_game();
+                    vec![
+                        Effect::ClearRegion,
+                        Effect::Print(vec!["Game exited.".to_string()]),
+                    ]
+                }
+                Err(message) => {
+                    self.game.set_error(message);
+                    self.board_effects()
+                }
+            },
             Some(Pending::Ping) => {
                 if reply.trim() == "PONG" {
                     print_line("Pong")
@@ -270,6 +322,9 @@ impl ClientCore {
         if game_type == Some("blackjack") {
             return self.handle_blackjack_key(key);
         }
+        if game_type == Some("crash") {
+            return self.handle_crash_key(key);
+        }
 
         match key {
             Key::CtrlC => vec![Effect::Quit],
@@ -559,6 +614,138 @@ impl ClientCore {
         ))]
     }
 
+    /// Redraw the rising multiplier. Called by the terminal loop on a timer.
+    pub fn tick(&mut self) -> Vec<Effect> {
+        let Some(started) = self.crash_started else {
+            return Vec::new();
+        };
+        self.tick_at(started.elapsed())
+    }
+
+    pub fn tick_at(&mut self, elapsed: Duration) -> Vec<Effect> {
+        if self.crash_started.is_none() {
+            return Vec::new();
+        }
+        if self
+            .game
+            .get_current_state()
+            .map(|state| state.game_type.as_str())
+            != Some("crash")
+        {
+            return Vec::new();
+        }
+        self.game.set_crash_multiplier(multiplier_at(elapsed));
+        self.board_effects()
+    }
+
+    /// True while the server may push a crash event between requests.
+    pub fn expects_push(&self) -> bool {
+        self.crash_started.is_some()
+    }
+
+    pub fn is_async(&self, line: &str) -> bool {
+        line.trim_start().starts_with("CRASH_BUSTED ")
+    }
+
+    /// Handle a server-initiated line. Returns `None` when the line is a normal
+    /// request/response reply and belongs to `handle_reply`.
+    pub fn handle_async_line(&mut self, line: &str) -> Option<Vec<Effect>> {
+        if !self.is_async(line) {
+            return None;
+        }
+        match parse_crash_response(line) {
+            Ok(state) => Some(self.apply_crash(state)),
+            Err(message) => {
+                self.game.set_error(message);
+                Some(self.board_effects())
+            }
+        }
+    }
+
+    fn apply_crash(&mut self, state: CrashState) -> Vec<Effect> {
+        self.balance = Some(state.balance);
+        if state.is_running() {
+            if self.crash_started.is_none() {
+                self.crash_started = Some(Instant::now());
+            }
+        } else {
+            self.crash_started = None;
+        }
+        self.game.apply_crash_state(state);
+        self.board_effects()
+    }
+
+    fn handle_crash_key(&mut self, key: Key) -> Vec<Effect> {
+        let status = self.game.crash_status();
+        let running = status == "running";
+
+        match key {
+            Key::CtrlC => vec![Effect::Quit],
+            Key::Char('q') => {
+                if running {
+                    let Some(session) = self.game.crash_session_id() else {
+                        return Vec::new();
+                    };
+                    self.pending = Some(Pending::CrashForfeit);
+                    vec![Effect::SendLine(format!("CRASH_FORFEIT {session}"))]
+                } else {
+                    self.crash_started = None;
+                    self.game.end_game();
+                    vec![
+                        Effect::ClearRegion,
+                        Effect::Print(vec!["Game exited.".to_string()]),
+                    ]
+                }
+            }
+            Key::Char(' ') if !running && self.pending.is_none() => self.start_crash(),
+            Key::Char('c') if running && self.pending.is_none() => self.cash_out_crash(),
+            Key::Char('+') | Key::Char('=') if !running => {
+                let _ = self.game.adjust_bet(10);
+                self.board_effects()
+            }
+            Key::Char('-') if !running => {
+                let _ = self.game.adjust_bet(-10);
+                self.board_effects()
+            }
+            _ => Vec::new(),
+        }
+    }
+
+    fn start_crash(&mut self) -> Vec<Effect> {
+        let status = self.game.crash_status();
+        if !matches!(status.as_str(), "ready" | "cashed" | "crashed" | "forfeit") {
+            return Vec::new();
+        }
+        let Some(request) = self.game.spin_request() else {
+            return Vec::new();
+        };
+        if let Some(balance) = self.balance {
+            let bet = self
+                .game
+                .get_current_state()
+                .map(|state| state.bet_amount)
+                .unwrap_or(0);
+            if bet as i64 > balance {
+                self.game.set_error("Insufficient balance");
+                return self.board_effects();
+            }
+        }
+
+        self.game.set_crash_status("starting");
+        self.pending = Some(Pending::CrashStart);
+        let mut effects = self.board_effects();
+        effects.push(Effect::SendLine(request));
+        effects
+    }
+
+    fn cash_out_crash(&mut self) -> Vec<Effect> {
+        let Some(session) = self.game.crash_session_id() else {
+            return Vec::new();
+        };
+        self.pending = Some(Pending::CrashCashout);
+        vec![Effect::SendLine(format!("CRASH_CASHOUT {session}"))]
+    }
+
     fn submit(&mut self) -> Vec<Effect> {
         let line = self.input.trim().to_string();
         self.input.clear();
@@ -616,6 +803,7 @@ impl ClientCore {
                 self.connected = false;
                 self.logged_in = None;
                 self.pending = None;
+                self.crash_started = None;
                 self.game.end_game();
                 vec![
                     Effect::ClearRegion,
diff --git a/src/client/games/crash.rs b/src/client/games/crash.rs
new file mode 100644
index 0000000..19733f2
--- /dev/null
+++ b/src/client/games/crash.rs
@@ -0,0 +1,91 @@
+use super::traits::{Game, GameState};
+
+pub const CRASH_BOARD_LINES: usize = 6;
+
+pub struct CrashGame;
+
+impl CrashGame {
+    pub fn new() -> Self {
+        Self
+    }
+
+    fn value<'a>(state: &'a GameState, key: &str) -> Option<&'a str> {
+        state.data.get(key).map(String::as_str)
+    }
+
+    fn status_text(state: &GameState) -> String {
+        let status = Self::value(state, "status").unwrap_or("ready");
+        match status {
+            "starting" => "Starting...".to_string(),
+            "running" => "Rising... cash out before it crashes.".to_string(),
+            "cashed" => format!(
+                "Cashed out at {}x   Won {} PLN",
+                Self::value(state, "multiplier").unwrap_or("1.00"),
+                Self::value(state, "payout").unwrap_or("0")
+            ),
+            "crashed" => format!(
+                "CRASHED at {}x   Bet lost",
+                Self::value(state, "crash_point").unwrap_or("?")
+            ),
+            "forfeit" => "Forfeited. Bet lost.".to_string(),
+            _ => "Press [SPACE] to start.".to_string(),
+        }
+    }
+
+    fn controls(state: &GameState) -> &'static str {
+        if Self::value(state, "status") == Some("running") {
+            "[C] Cash out   [Q] Forfeit"
+        } else {
+            "[SPACE] Play   [+/=/-] Bet   [Q] Quit"
+        }
+    }
+}
+
+impl Game for CrashGame {
+    fn get_name(&self) -> &'static str {
+        "Crash"
+    }
+
+    fn render(&self, state: &GameState) -> String {
+        let balance = Self::value(state, "balance").unwrap_or("?");
+        let multiplier = Self::value(state, "multiplier").unwrap_or("1.00");
+        let potential = Self::value(state, "potential")
+            .map(str::to_string)
+            .unwrap_or_else(|| state.bet_amount.to_string());
+
+        if let Some(error) = Self::value(state, "error") {
+            return format!(
+                "=== CRASH ===\r\nBalance: {balance} PLN   Bet: {} PLN\r\n\r\nERROR: {error}\r\n\r\n[SPACE] Play   [+/=/-] Bet   [Q] Quit",
+                state.bet_amount
+            );
+        }
+
+        format!(
+            "=== CRASH ===\r\nBalance: {} PLN   Bet: {} PLN\r\nMultiplier: {}x\r\nPotential: {} PLN\r\n{}\r\n{}",
+            balance,
+            state.bet_amount,
+            multiplier,
+            potential,
+            Self::status_text(state),
+            Self::controls(state)
+        )
+    }
+
+    fn render_lines(&self, _state: &GameState) -> usize {
+        CRASH_BOARD_LINES
+    }
+
+    fn get_help(&self) -> String {
+        "CRASH\n\
+        =====\n\
+        The multiplier rises from 1.00x and crashes at a hidden point.\n\
+        Cash out before it crashes to win bet x multiplier.\n\
+        A round can crash at 1.00x, so an instant cashout still risks the bet.\n\
+        \n\
+        C - cash out at the server's current multiplier\n\
+        SPACE - start the next round\n\
+        +/- - change the next round's bet\n\
+        Q - forfeit an active round (bet is lost), or leave when idle"
+            .to_string()
+    }
+}
diff --git a/src/client/games/manager.rs b/src/client/games/manager.rs
index 4e0218b..4d9e6a8 100644
--- a/src/client/games/manager.rs
+++ b/src/client/games/manager.rs
@@ -1,9 +1,11 @@
 use super::blackjack::BlackjackGame;
+use super::crash::CrashGame;
 use super::response::{RouletteResult, SpinResult};
 use super::roulette::RouletteGame;
 use super::slots::SlotsGame;
 use super::traits::{Game, GameError, GamePhase, GameState};
 use crate::blackjack::BlackjackState;
+use crate::crash::{payout, CrashState};
 use crate::roulette::Bets;
 use std::collections::HashMap;
 
@@ -18,6 +20,7 @@ impl GameManager {
         games.insert("slots".to_string(), Box::new(SlotsGame::new()));
         games.insert("roulette".to_string(), Box::new(RouletteGame::new()));
         games.insert("blackjack".to_string(), Box::new(BlackjackGame::new()));
+        games.insert("crash".to_string(), Box::new(CrashGame::new()));
 
         Self {
             current_session: None,
@@ -57,6 +60,10 @@ impl GameManager {
         } else if game_type == "blackjack" {
             data.insert("status".to_string(), "ready".to_string());
             10
+        } else if game_type == "crash" {
+            data.insert("status".to_string(), "ready".to_string());
+            data.insert("multiplier".to_string(), "1.00".to_string());
+            10
         } else {
             10
         };
@@ -173,11 +180,19 @@ impl GameManager {
         session.data.remove("winnings");
         session.data.remove("number");
         session.data.remove("color");
+        session.data.remove("payout");
+        session.data.remove("crash_point");
         if session.game_type == "roulette" {
             session
                 .data
                 .insert("status".to_string(), "place".to_string());
         }
+        if session.game_type == "crash" {
+            session
+                .data
+                .insert("status".to_string(), "ready".to_string());
+            session.data.remove("session_id");
+        }
         session.data.insert("error".to_string(), message.into());
     }
 
@@ -309,6 +324,81 @@ impl GameManager {
         }
     }
 
+    pub fn apply_crash_state(&mut self, state: CrashState) {
+        let Some(session) = self.current_session.as_mut() else {
+            return;
+        };
+        let running = state.is_running();
+        session.phase = if running {
+            GamePhase::Playing
+        } else {
+            GamePhase::Finished
+        };
+        session.bet_amount = state.bet;
+        session.data.remove("error");
+        for key in ["crash_point", "payout"] {
+            session.data.remove(key);
+        }
+        session.data.insert("status".to_string(), state.phase.clone());
+        session
+            .data
+            .insert("session_id".to_string(), state.session_id);
+        session
+            .data
+            .insert("balance".to_string(), state.balance.to_string());
+        session
+            .data
+            .insert("multiplier".to_string(), format!("{:.2}", state.multiplier));
+        session
+            .data
+            .insert("potential".to_string(), state.potential.to_string());
+        session
+            .data
+            .insert("payout".to_string(), state.payout.to_string());
+        if let Some(crash_point) = state.crash_point {
+            session
+                .data
+                .insert("crash_point".to_string(), format!("{crash_point:.2}"));
+        }
+    }
+
+    /// Redraw the live multiplier from the client's local clock.
+    pub fn set_crash_multiplier(&mut self, multiplier: f64) {
+        let Some(session) = self.current_session.as_mut() else {
+            return;
+        };
+        let bet = session.bet_amount;
+        session
+            .data
+            .insert("multiplier".to_string(), format!("{multiplier:.2}"));
+        session
+            .data
+            .insert("potential".to_string(), payout(bet, multiplier).to_string());
+    }
+
+    pub fn set_crash_status(&mut self, status: &str) {
+        if let Some(session) = self.current_session.as_mut() {
+            session
+                .data
+                .insert("status".to_string(), status.to_string());
+        }
+    }
+
+    pub fn crash_status(&self) -> String {
+        self.current_session
+            .as_ref()
+            .and_then(|session| session.data.get("status"))
+            .cloned()
+            .unwrap_or_else(|| "ready".to_string())
+    }
+
+    pub fn crash_session_id(&self) -> Option<String> {
+        self.current_session
+            .as_ref()
+            .and_then(|session| session.data.get("session_id"))
+            .cloned()
+    }
+
     pub fn get_current_game(&self) -> Option<&dyn Game> {
         self.current_session
             .as_ref()
diff --git a/src/client/games/mod.rs b/src/client/games/mod.rs
index 40ba32a..e966a25 100644
--- a/src/client/games/mod.rs
+++ b/src/client/games/mod.rs
@@ -1,4 +1,5 @@
 pub mod blackjack;
+pub mod crash;
 pub mod manager;
 pub mod response;
 pub mod roulette;
diff --git a/src/client/games/response.rs b/src/client/games/response.rs
index d9883f7..71e1fed 100644
--- a/src/client/games/response.rs
+++ b/src/client/games/response.rs
@@ -163,3 +163,24 @@ pub fn parse_blackjack_response(
         .ok_or_else(|| format!("Unexpected server response: {response}"))?;
     serde_json::from_str(raw).map_err(|error| format!("Invalid blackjack state: {error}"))
 }
+
+pub fn parse_crash_response(response: &str) -> Result<crate::crash::CrashState, String> {
+    let response = response.trim();
+    if response.is_empty() {
+        return Err("No response from server".to_string());
+    }
+    if let Some(message) = response.strip_prefix("ERROR") {
+        let message = message.trim();
+        return Err(if message.is_empty() {
+            "Server error".to_string()
+        } else {
+            message.to_string()
+        });
+    }
+
+    let raw = ["CRASH_START ", "CRASH_STATE ", "CRASH_BUSTED "]
+        .iter()
+        .find_map(|prefix| response.strip_prefix(prefix))
+        .ok_or_else(|| format!("Unexpected server response: {response}"))?;
+    serde_json::from_str(raw).map_err(|error| format!("Invalid crash state: {error}"))
+}