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|
use super::traits::{Game, GameError, GamePhase, GameResult, GameState};
use crate::roulette::{color, Bets};
use rand::Rng;
use std::collections::HashMap;
pub struct RouletteGame {
fixed_number: Option<u8>,
}
impl RouletteGame {
pub fn new() -> Self {
Self { fixed_number: None }
}
pub fn with_result(number: u8) -> Self {
Self {
fixed_number: Some(number),
}
}
fn spin(&self) -> u8 {
match self.fixed_number {
Some(number) => number,
None => rand::thread_rng().gen_range(0..37),
}
}
}
impl Game for RouletteGame {
fn game_type(&self) -> &'static str {
"roulette"
}
fn get_name(&self) -> &'static str {
"Roulette"
}
fn get_description(&self) -> &'static str {
"European roulette. Bet on red/black, even/odd, or a straight number."
}
fn prepare_state(&self, username: &str, bet_amount: u64) -> GameState {
let mut data = HashMap::new();
data.insert("username".to_string(), username.to_string());
data.insert("status".to_string(), "ready".to_string());
GameState {
session_id: String::new(),
game_type: "roulette".to_string(),
bet_amount,
phase: GamePhase::WaitingToStart,
data,
}
}
fn process_action(
&self,
state: &GameState,
action: &str,
params: &[&str],
) -> Result<GameState, GameError> {
if state.phase == GamePhase::Finished {
return Err(GameError::GameOver);
}
match action {
"spin" => {
if state.phase != GamePhase::WaitingToStart && state.phase != GamePhase::Playing {
return Err(GameError::InvalidAction(
"Cannot spin in current phase".to_string(),
));
}
let payload = params.first().ok_or(GameError::InvalidAction(
"Missing roulette bets".to_string(),
))?;
let bets: Bets = serde_json::from_str(payload)
.map_err(|error| GameError::InvalidAction(format!("Invalid bets: {error}")))?;
if bets.is_empty() {
return Err(GameError::InvalidBet);
}
if let Err(message) = bets.validate(state.bet_amount) {
return Err(GameError::InvalidAction(message));
}
if bets.total() != state.bet_amount {
return Err(GameError::InvalidBet);
}
let number = self.spin();
let bets_json = serde_json::to_string(&bets)
.map_err(|error| GameError::InternalError(error.to_string()))?;
let mut new_data = state.data.clone();
new_data.insert("status".to_string(), "spun".to_string());
new_data.insert("bets".to_string(), bets_json);
new_data.insert("number".to_string(), number.to_string());
new_data.insert("color".to_string(), color(number).to_string());
Ok(GameState {
session_id: state.session_id.clone(),
game_type: state.game_type.clone(),
bet_amount: state.bet_amount,
phase: GamePhase::Finished,
data: new_data,
})
}
_ => Err(GameError::InvalidAction(format!(
"Unknown action: {action}"
))),
}
}
fn calculate_result(&self, state: &GameState) -> Result<GameResult, GameError> {
if state.phase != GamePhase::Finished {
return Err(GameError::InternalError("Game not finished".to_string()));
}
let number: u8 = state
.data
.get("number")
.ok_or(GameError::InternalError("No winning number".to_string()))?
.parse()
.map_err(|_| GameError::InternalError("Invalid winning number".to_string()))?;
let bets_json = state
.data
.get("bets")
.ok_or(GameError::InternalError("No bets".to_string()))?
.clone();
let bets: Bets = serde_json::from_str(&bets_json)
.map_err(|error| GameError::InternalError(format!("Invalid bets: {error}")))?;
let winnings = bets.winnings(number);
let mut result_data = HashMap::new();
result_data.insert("number".to_string(), number.to_string());
result_data.insert("color".to_string(), color(number).to_string());
result_data.insert("bets".to_string(), bets_json);
Ok(GameResult {
session_id: state.session_id.clone(),
game_type: state.game_type.clone(),
bet_amount: state.bet_amount,
winnings,
final_balance: 0,
result_data,
})
}
}
|
