From 2e021c8b9e3fc2fbeeff1150880e4d0a3c7f9672 Mon Sep 17 00:00:00 2001
From: gamer147 <gamer147@gmail.com>
Date: Fri, 29 May 2026 14:12:43 -0400
Subject: [PATCH] refactor(builddeck): route currency spend through
 CurrencySpendService

Inject ICurrencySpendService and replace the inline crystal/rupee debit
block in BuildDeckController.Buy with TrySpendAsync calls, so freeplay
mode gets the no-deduct path automatically. All 18 BuildDeckController
tests pass unchanged.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
---
 .../Controllers/BuildDeckController.cs        | 21 +++++++++----------
 1 file changed, 10 insertions(+), 11 deletions(-)

diff --git a/SVSim.EmulatedEntrypoint/Controllers/BuildDeckController.cs b/SVSim.EmulatedEntrypoint/Controllers/BuildDeckController.cs
index 5fb3075..01e12df 100644
--- a/SVSim.EmulatedEntrypoint/Controllers/BuildDeckController.cs
+++ b/SVSim.EmulatedEntrypoint/Controllers/BuildDeckController.cs
@@ -22,15 +22,18 @@ public class BuildDeckController : SVSimController
     private readonly IBuildDeckRepository _repo;
     private readonly SVSimDbContext _db;
     private readonly RewardGrantService _rewards;
+    private readonly ICurrencySpendService _spend;
 
     public BuildDeckController(
         IBuildDeckRepository repo,
         SVSimDbContext db,
-        RewardGrantService rewards)
+        RewardGrantService rewards,
+        ICurrencySpendService spend)
     {
         _repo = repo;
         _db = db;
         _rewards = rewards;
+        _spend = spend;
     }
 
     /// <summary>
@@ -200,19 +203,15 @@ public class BuildDeckController : SVSimController
         // Debit + post-state currency entry
         if (request.SalesType == 1)
         {
-            ulong cost = (ulong)priceCrystal!.Value;
-            if (viewer.Currency.Crystals < cost)
-                return BadRequest(new { error = "insufficient_crystals" });
-            viewer.Currency.Crystals -= cost;
-            rewardList.Add(new RewardListEntry { RewardType = 2, RewardId = 0, RewardNum = (int)viewer.Currency.Crystals });
+            var r = await _spend.TrySpendAsync(viewer, SpendCurrency.Crystal, priceCrystal!.Value);
+            if (!r.Success) return BadRequest(new { error = "insufficient_crystals" });
+            rewardList.Add(new RewardListEntry { RewardType = 2, RewardId = 0, RewardNum = (int)r.PostStateTotal });
         }
         else if (request.SalesType == 2)
         {
-            ulong cost = (ulong)priceRupy!.Value;
-            if (viewer.Currency.Rupees < cost)
-                return BadRequest(new { error = "insufficient_rupees" });
-            viewer.Currency.Rupees -= cost;
-            rewardList.Add(new RewardListEntry { RewardType = 9, RewardId = 0, RewardNum = (int)viewer.Currency.Rupees });
+            var r = await _spend.TrySpendAsync(viewer, SpendCurrency.Rupee, priceRupy!.Value);
+            if (!r.Success) return BadRequest(new { error = "insufficient_rupees" });
+            rewardList.Add(new RewardListEntry { RewardType = 9, RewardId = 0, RewardNum = (int)r.PostStateTotal });
         }
         // sales_type == 0 (free): no debit, no currency entry