feat: cost implementation for card play

src/samples/slay-the-spire-like/system/combat/effects.ts

@@ -1,7 +1,7 @@
-import {CombatEntity, EffectTable} from "./types";
-import {EffectData} from "@/samples/slay-the-spire-like/system/types";
-import {PlayerEntity} from "@/samples/slay-the-spire-like/system/combat/types";
-import {CombatState} from "./types";
+import {CombatEntity, CombatState, EffectTable, PlayerEntity} from "./types";
+import {CardData, EffectData} from "@/samples/slay-the-spire-like/system/types";
+import {GameItemMeta} from "@/samples/slay-the-spire-like/system/progress/types";
+import {GridInventory} from "@/samples/slay-the-spire-like/system/grid-inventory/types";
 
 export function addEffect(effects: EffectTable, effect: EffectData, stacks: number){
     let current = effects[effect.id];
@@ -82,4 +82,28 @@ export function* getAliveEnemies(state: CombatState) {
 
 export function getCombatEntity(state: CombatState, entityKey: string){
     return entityKey === 'player' ? state.player : state.enemies.find(e => e.id === entityKey);
-}
+}
+
+export function canPlayCard(player: PlayerEntity, costType: CardData['costType'], costCount: number, itemId: string, inventory: GridInventory<GameItemMeta>): boolean {
+    if (costType === 'energy') {
+        return player.energy >= costCount;
+    }
+    if (costType === 'uses') {
+        const item = inventory.items.get(itemId);
+        if (!item || !item.meta) return false;
+        const depletion = item.meta.depletion ?? 0;
+        return depletion < costCount;
+    }
+    return true;
+}
+
+export function payCardCost(player: PlayerEntity, costType: CardData['costType'], costCount: number, itemId: string, inventory: GridInventory<GameItemMeta>): void {
+    if (costType === 'energy') {
+        player.energy -= costCount;
+    } else if (costType === 'uses') {
+        const item = inventory.items.get(itemId);
+        if (item && item.meta) {
+            item.meta.depletion = (item.meta.depletion ?? 0) + costCount;
+        }
+    }
+}