From d0a0fcfdeda2c315a13ddd96b4fca958da0d9858 Mon Sep 17 00:00:00 2001
From: Ilion Beyst <ilion.beyst@gmail.com>
Date: Sat, 25 Dec 2021 14:45:05 +0100
Subject: cli for running matches

---
 planetwars-localdev/src/match_runner/pw_match.rs | 136 +++++++++++++++++++++++
 1 file changed, 136 insertions(+)
 create mode 100644 planetwars-localdev/src/match_runner/pw_match.rs

(limited to 'planetwars-localdev/src/match_runner/pw_match.rs')

diff --git a/planetwars-localdev/src/match_runner/pw_match.rs b/planetwars-localdev/src/match_runner/pw_match.rs
new file mode 100644
index 0000000..42bc9d2
--- /dev/null
+++ b/planetwars-localdev/src/match_runner/pw_match.rs
@@ -0,0 +1,136 @@
+use super::match_context::{MatchCtx, RequestResult};
+use futures::stream::futures_unordered::FuturesUnordered;
+use futures::{FutureExt, StreamExt};
+use serde::{Deserialize, Serialize};
+use tokio::time::Duration;
+
+use serde_json;
+
+use std::convert::TryInto;
+
+pub use planetwars_rules::config::{Config, Map};
+
+use planetwars_rules::protocol::{self as proto, PlayerAction};
+use planetwars_rules::serializer as pw_serializer;
+use planetwars_rules::{PlanetWars, PwConfig};
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct MatchConfig {
+    pub map_name: String,
+    pub max_turns: usize,
+}
+
+pub struct PwMatch {
+    match_ctx: MatchCtx,
+    match_state: PlanetWars,
+}
+
+impl PwMatch {
+    pub fn create(match_ctx: MatchCtx, config: PwConfig) -> Self {
+        // TODO: this is kind of hacked together at the moment
+        let match_state = PlanetWars::create(config, match_ctx.players().len());
+
+        PwMatch {
+            match_state,
+            match_ctx,
+        }
+    }
+
+    pub async fn run(mut self) {
+        while !self.match_state.is_finished() {
+            let player_messages = self.prompt_players().await;
+
+            for (player_id, turn) in player_messages {
+                let res = self.execute_action(player_id, turn);
+                if let Some(err) = action_errors(res) {
+                    let info_str = serde_json::to_string(&err).unwrap();
+                    self.match_ctx.send_info(player_id as u32, info_str);
+                }
+            }
+            self.match_state.step();
+
+            // Log state
+            let state = self.match_state.serialize_state();
+            self.match_ctx
+                .log_string(serde_json::to_string(&state).unwrap());
+        }
+    }
+
+    async fn prompt_players(&mut self) -> Vec<(usize, RequestResult<Vec<u8>>)> {
+        // borrow these outside closure to make the borrow checker happy
+        let state = self.match_state.state();
+        let match_ctx = &mut self.match_ctx;
+
+        // TODO: this numbering is really messy.
+        // Get rid of the distinction between player_num
+        // and player_id.
+
+        self.match_state
+            .state()
+            .players
+            .iter()
+            .filter(|p| p.alive)
+            .map(move |player| {
+                let state_for_player = pw_serializer::serialize_rotated(&state, player.id - 1);
+                match_ctx
+                    .request(
+                        player.id.try_into().unwrap(),
+                        serde_json::to_vec(&state_for_player).unwrap(),
+                        Duration::from_millis(1000),
+                    )
+                    .map(move |resp| (player.id, resp))
+            })
+            .collect::<FuturesUnordered<_>>()
+            .collect::<Vec<_>>()
+            .await
+    }
+
+    fn execute_action(
+        &mut self,
+        player_num: usize,
+        turn: RequestResult<Vec<u8>>,
+    ) -> proto::PlayerAction {
+        let turn = match turn {
+            Err(_timeout) => return proto::PlayerAction::Timeout,
+            Ok(data) => data,
+        };
+
+        let action: proto::Action = match serde_json::from_slice(&turn) {
+            Err(err) => return proto::PlayerAction::ParseError(err.to_string()),
+            Ok(action) => action,
+        };
+
+        let commands = action
+            .commands
+            .into_iter()
+            .map(|command| {
+                let res = self.match_state.execute_command(player_num, &command);
+                proto::PlayerCommand {
+                    command,
+                    error: res.err(),
+                }
+            })
+            .collect();
+
+        return proto::PlayerAction::Commands(commands);
+    }
+}
+
+fn action_errors(action: PlayerAction) -> Option<PlayerAction> {
+    match action {
+        PlayerAction::Commands(commands) => {
+            let failed = commands
+                .into_iter()
+                .filter(|cmd| cmd.error.is_some())
+                .collect::<Vec<_>>();
+
+            if failed.is_empty() {
+                None
+            } else {
+                Some(PlayerAction::Commands(failed))
+            }
+        }
+        e => Some(e),
+    }
+}
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