Higlight a piece to pick up during tutorial

src/game.rs

@@ -1393,13 +1393,13 @@ fn show_valid_moves(
         // For each one with a ValidMove index, make it visible
         let valid_moves = board.valid_moves(*idx);
         info!("Showing valid moves for {:?}: {:?}", idx, valid_moves);
-        valid_moves.iter().for_each(|idx| {
-            indicators.iter_mut().for_each(|(i, mut vis)| {
-                if i == idx {
-                    *vis = Visibility::Inherited;
-                }
-            });
-        })
+        indicators.iter_mut().for_each(|(i, mut vis)| {
+            if valid_moves.contains(i) {
+                *vis = Visibility::Inherited;
+            } else {
+                *vis = Visibility::Hidden;
+            }
+        });
     });
 }
 

src/tutorial.rs

@@ -373,6 +373,9 @@ fn step(
     pieces: Query<&game::Piece, Added<game::Selected>>,
     transitions: Query<Entity, Changed<game::Side>>,
     curr_state: Res<State<TutorialState>>,
+    all_pieces: Query<(&Piece, &BoardIndex, &Side)>,
+    side_state: Res<State<TurnState>>,
+    mut valid_moves: Query<(&mut Visibility, &BoardIndex), With<game::ValidMove>>,
     mut next_state: ResMut<NextState<TutorialState>>,
     mut seen: ResMut<SeenStates>,
 ) {
@@ -457,6 +460,30 @@ fn step(
                 }
                 // Default, empty (tutorial doesn't always need to show something)
                 else {
+                    // When prompting to show a piece, find a random piece on this side and high-light it
+                    all_pieces.iter()
+                        .find_map(|(piece, board_index, side)| {
+                            if *side == side_state.get().0 {
+                                if !queen_seen && *piece == Piece::Queen {
+                                    Some(board_index)
+                                } else if !drone_seen && *piece == Piece::Drone {
+                                    Some(board_index)
+                                } else if !pawn_seen && *piece == Piece::Pawn {
+                                    Some(board_index)
+                                } else {
+                                    None
+                                }
+                            } else {
+                                None
+                            }
+                        })
+                        .iter()
+                        .for_each(|hilight_index| {
+                            valid_moves
+                                .iter_mut()
+                                .filter(|(_, board_index)| board_index == hilight_index)
+                                .for_each(|(mut vis, _)| *vis = Visibility::Inherited);
+                        });
                     TutorialState::PieceIntro
                 }
             };