trictrac/client_cli/src/game_runner.rs

use bot::{Bot, BotStrategy, DefaultStrategy};
use store::{CheckerMove, DiceRoller, GameEvent, GameState, PlayerId, TurnStage};

// Application Game
#[derive(Debug, Default)]
pub struct GameRunner {
    pub state: GameState,
    pub dice_roller: DiceRoller,
    pub first_move: Option<CheckerMove>,
    pub player_id: Option<PlayerId>,
    bots: Vec<Bot>,
}

impl GameRunner {
    // Constructs a new instance of [`App`].
    pub fn new(
        schools_enabled: bool,
        bot_strategies: Vec<Box<dyn BotStrategy>>,
        seed: Option<u64>,
    ) -> Self {
        let mut state = GameState::new(schools_enabled);
        // local : player
        let player_id: Option<PlayerId> = state.init_player("myself");

        // bots
        let bots: Vec<Bot> = bot_strategies
            .into_iter()
            .map(|strategy| {
                let bot_id: PlayerId = state.init_player("bot").unwrap();
                let bot_color = state.player_color_by_id(&bot_id).unwrap();
                Bot::new(strategy, bot_color)
            })
            .collect();
        // let bot_strategy = Box::new(DefaultStrategy::default());
        // let bot: Bot = Bot::new(bot_strategy, bot_color, schools_enabled);
        // let bot: Bot = Bot::new(bot_strategy, bot_color);

        let first_player_id = if bots.len() > 1 {
            bots[0].player_id
        } else {
            player_id.unwrap()
        };
        let mut game = Self {
            state,
            dice_roller: DiceRoller::new(seed),
            first_move: None,
            player_id,
            bots,
        };
        game.handle_event(&GameEvent::BeginGame {
            goes_first: first_player_id,
        });
        game
    }

    pub fn handle_event(&mut self, event: &GameEvent) -> Option<GameEvent> {
        if !self.state.validate(event) {
            return None;
        }
        // println!("consuming {:?}", event);
        self.state.consume(event);

        // chain all successive bot actions
        if self.bots.is_empty() {
            return None;
        }

        // Collect bot actions to avoid borrow conflicts
        let bot_events: Vec<GameEvent> = self
            .bots
            .iter_mut()
            .filter_map(|bot| bot.handle_event(event))
            .collect();

        let mut next_event = None;
        for bot_event in bot_events {
            println!("bot event {:?}", bot_event);
            let bot_result_event = self.handle_event(&bot_event);
            if let Some(bot_id) = bot_event.player_id() {
                next_event = if self.bot_needs_dice_roll(bot_id) {
                    let dice = self.dice_roller.roll();
                    self.handle_event(&GameEvent::RollResult {
                        player_id: bot_id,
                        dice,
                    })
                } else {
                    bot_result_event
                }
            }
        }
        next_event
    }

    fn bot_needs_dice_roll(&self, bot_id: PlayerId) -> bool {
        self.state.active_player_id == bot_id && self.state.turn_stage == TurnStage::RollWaiting
    }
}