From 1cd5247ccbd34bb76ab9d1fe80e67f6319fa000c Mon Sep 17 00:00:00 2001
From: Justin Wernick <justin@worthe-it.co.za>
Date: Fri, 10 Apr 2020 23:37:15 +0200
Subject: Initial bad strategy

---
 src/main.rs  | 19 ++++++++++++++++++-
 src/state.rs | 28 ++++++++++++++++++++++++++++
 2 files changed, 46 insertions(+), 1 deletion(-)

diff --git a/src/main.rs b/src/main.rs
index 74428c3..92b0a1b 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -26,5 +26,22 @@ fn main() {
 }
 
 fn choose_command(state: &GameState) -> Command {
-    Command::Accelerate
+    let player_moves = state.valid_moves(0);
+    let naive_result = player_moves
+        .into_iter()
+        .map(|player_move| {
+            let mut state = state.clone();
+            state.update([player_move, Command::Nothing]);
+            (player_move, state)
+        })
+        .max_by(|(_, state_1), (_, state_2)| {
+            state_1.players[0]
+                .position
+                .x
+                .cmp(&state_2.players[0].position.x)
+                .then(state_1.players[0].speed.cmp(&state_2.players[0].speed))
+        })
+        .unwrap()
+        .0;
+    naive_result
 }
diff --git a/src/state.rs b/src/state.rs
index 1dfa21d..6285e75 100644
--- a/src/state.rs
+++ b/src/state.rs
@@ -1,6 +1,7 @@
 use crate::command::Command;
 use crate::consts::*;
 
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum GameStatus {
     Continue,
     PlayerOneWon,
@@ -8,6 +9,7 @@ pub enum GameStatus {
     Draw, // Until I add score I guess
 }
 
+#[derive(Debug, Clone, PartialEq, Eq)]
 pub struct GameState {
     pub status: GameStatus,
     pub players: [Player; 2],
@@ -17,6 +19,7 @@ pub struct GameState {
     pub finish_lines: Vec<Position>,
 }
 
+#[derive(Debug, Clone, PartialEq, Eq)]
 pub struct Player {
     pub position: Position,
     pub next_position: Position,
@@ -110,6 +113,31 @@ impl GameState {
             );
         }
     }
+
+    pub fn valid_moves(&self, player_index: usize) -> Vec<Command> {
+        let player = &self.players[player_index];
+        let mut result = Vec::with_capacity(7);
+        result.push(Command::Nothing);
+        if player.speed < SPEED_4 {
+            result.push(Command::Accelerate);
+        }
+        if player.speed > SPEED_0 {
+            result.push(Command::Decelerate);
+        }
+        if player.position.y > 0 {
+            result.push(Command::TurnLeft);
+        }
+        if player.position.y < WIDTH {
+            result.push(Command::TurnRight);
+        }
+        if player.boosts > 0 {
+            result.push(Command::UseBoost);
+        }
+        if player.oils > 0 {
+            result.push(Command::UseOil);
+        }
+        result
+    }
 }
 
 impl Player {
-- 
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