we have a card drawn! progress!

src/main.rs

@@ -2,46 +2,78 @@ use bevy::{prelude::*, utils::HashMap};
 
 fn main() {
     App::new()
-        .add_systems(Startup, startup)
         .add_plugins(DefaultPlugins)
+        .init_state::<GameState>()
+        .add_systems(Startup, (load, start_setup).chain())
+        .add_systems(
+            OnEnter(GameState::Setup),
+            (setup_cards, setup_camera, start_play).chain(),
+        )
         .run();
 }
 
-fn startup(mut commands: Commands, server: Res<AssetServer>) {
+#[derive(States, Default, Debug, Clone, PartialEq, Eq, Hash)]
+enum GameState {
+    #[default]
+    Boot,
+    Setup,
+    Play,
+}
+
+fn load(mut commands: Commands, server: Res<AssetServer>) {
     let sprite = Sprite {
         image: server.load("red_oval_open_one.png"),
         ..default()
     };
-    let mut cards = HashMap::new();
+
     let card = Card {
         color: ItemColor::Red,
         shape: ItemShape::Oval,
         pattern: ItemPattern::Open,
         number: ItemNumber::One,
     };
+
+    let mut cards = HashMap::new();
     cards.insert(card, sprite);
-    // [ItemColor::Red, ItemColor::Green, ItemColor::Purple]
-    //     .iter()
-    //     .for_each(|c| {
-    //         [ItemNumber::One, ItemNumber::Two, ItemNumber::Three]
-    //             .iter()
-    //             .for_each(|n| {
-    //                 [ItemPattern::Solid, ItemPattern::Striped, ItemPattern::Open]
-    //                     .iter()
-    //                     .for_each(|p| {
-    //                         [ItemShape::Oval, ItemShape::Diamond, ItemShape::Squiggle]
-    //                             .iter()
-    //                             .for_each(|s| {
-    //                                 cards.insert((*c, *s, *p, *n), sprite.clone());
-    //                             });
-    //                     });
-    //             });
-    //     });
+
     let test_deck = Deck { cards };
+
     commands.insert_resource(test_deck);
 }
 
-// 81 cards total
+fn setup_camera(mut commands: Commands) {
+    commands.spawn((
+        Camera2d,
+        Camera {
+            hdr: true,
+            ..default()
+        },
+    ));
+}
+
+fn setup_cards(mut commands: Commands, deck: Res<Deck>) {
+    let this = deck
+        .cards
+        .get(&Card {
+            color: ItemColor::Red,
+            shape: ItemShape::Oval,
+            pattern: ItemPattern::Open,
+            number: ItemNumber::One,
+        })
+        .unwrap()
+        .clone();
+    commands.spawn(this);
+}
+
+fn start_play(mut game_state: ResMut<NextState<GameState>>) {
+    game_state.set(GameState::Play);
+}
+
+fn start_setup(mut game_state: ResMut<NextState<GameState>>) {
+    game_state.set(GameState::Setup);
+}
+
+// We expect 81 cards total
 #[derive(Resource)]
 struct Deck {
     cards: HashMap<Card, Sprite>,