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use async_trait::async_trait;
use protocol::{
actions::Bid,
bot::{BiddingBot, PlayingBot},
bridge_engine::{
BiddingStatePlayerView, GameState, PlayStatePlayerView, TableState,
},
card::Card,
simple_bots::{AlwaysPassBiddingBot, RandomPlayingBot},
};
use rand::random;
use sqlx::PgPool;
use crate::error::BridgeError;
#[async_trait]
pub trait Table {
fn state(&self) -> &TableState;
async fn bid(
self: Box<Self>,
bid: Bid,
) -> Result<Box<dyn Table + Send>, BridgeError>;
async fn play(
self: Box<Self>,
card: Card,
) -> Result<Box<dyn Table + Send>, BridgeError>;
async fn new_deal(self: Box<Self>) -> Result<Box<dyn Table + Send>, BridgeError>;
}
pub struct InMemoryTable {
pub state: TableState,
}
impl InMemoryTable {
pub fn new() -> Self {
Self {
state: TableState::Unknown,
}
}
}
#[async_trait]
impl Table for InMemoryTable {
fn state(&self) -> &TableState {
&self.state
}
async fn bid(
self: Box<Self>,
bid: Bid,
) -> Result<Box<dyn Table + Send>, BridgeError> {
let game = match self.state {
TableState::Game(game) => game,
_ => {
return Err(BridgeError::InvalidRequest("no game".to_string()))
}
};
let game = game.bid(bid)?;
Ok(Box::new(Self { state: game.into() }))
}
async fn play(
self: Box<Self>,
card: Card,
) -> Result<Box<dyn Table + Send>, BridgeError> {
let game = match self.state {
TableState::Game(game) => game,
_ => {
return Err(BridgeError::InvalidRequest("no game".to_string()))
}
};
let game = game.play(card)?;
Ok(Box::new(Self { state: game.into() }))
}
async fn new_deal(self: Box<Self>) -> Result<Box<dyn Table + Send>, BridgeError> {
Ok(Box::new(Self {
state: GameState::new(random(), random()).into(),
}))
}
}
pub async fn advance_play(
table: Box<dyn Table>,
) -> Result<Box<dyn Table + Send>, BridgeError> {
let game = match table.state() {
TableState::Game(game) => game,
_ => return Err(BridgeError::InvalidRequest("no game".to_string())),
};
let table = match game {
GameState::Bidding(ref bidding) => {
let player_view = BiddingStatePlayerView::from_bidding_state(
&bidding,
game.current_player(),
);
let bot = AlwaysPassBiddingBot {};
let bid = bot.bid(&player_view).await;
table.bid(bid).await
}
GameState::Play(game) => {
let player_view = PlayStatePlayerView::from_play_state(
&game,
game.current_player(),
);
let bot = RandomPlayingBot {};
let card = bot.play(&player_view).await;
table.play(card).await
}
};
table
}
pub struct DbTable {
db: PgPool,
pub inner: Box<dyn Table + Send>,
}
impl DbTable {
pub fn new(db: PgPool) -> Self {
Self {
db,
inner: Box::new(InMemoryTable::new()),
}
}
}
#[async_trait]
impl Table for DbTable {
fn state(&self) -> &TableState {
self.inner.state()
}
async fn bid(
self: Box<Self>,
bid: Bid,
) -> Result<Box<dyn Table + Send>, BridgeError> {
Ok(Box::new(Self { inner: self.inner.bid(bid).await?, ..*self }))
}
async fn play(
self: Box<Self>,
card: Card,
) -> Result<Box<dyn Table + Send>, BridgeError> {
Ok(Box::new(Self { inner: self.inner.play(card).await?, ..*self }))
}
async fn new_deal(self: Box<Self>) -> Result<Box<dyn Table + Send>, BridgeError> {
Ok(Box::new(Self { inner: self.inner.new_deal().await?, ..*self }))
}
}
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