From c14c2e403c75a913e1a6d962fb6fe64f013adae5 Mon Sep 17 00:00:00 2001
From: historia <[not public]>
Date: Wed, 1 Jul 2026 22:30:31 -0400
Subject: fix: combat formulas and mob attack types (mobs switch attack styles
 if safespotting)

---
 internal/item/store.go | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

(limited to 'internal/item/store.go')

diff --git a/internal/item/store.go b/internal/item/store.go
index b6e5567..e50e6e9 100644
--- a/internal/item/store.go
+++ b/internal/item/store.go
@@ -4,12 +4,14 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
+	"sync"
 
 	"gopkg.in/yaml.v3"
 	"thehouseoficarus/internal/behavior"
 )
 
 type ItemStore struct {
+	mu        sync.Mutex
 	dataDir   string
 	pathIndex map[string]string
 	cache     map[string]*ItemDef
@@ -25,6 +27,8 @@ func NewItemStore(dataDir string) *ItemStore {
 }
 
 func (s *ItemStore) Load(id string) (*ItemDef, error) {
+	s.mu.Lock()
+	defer s.mu.Unlock()
 	if def, ok := s.cache[id]; ok {
 		return def, nil
 	}
@@ -46,6 +50,8 @@ func (s *ItemStore) Load(id string) (*ItemDef, error) {
 }
 
 func (s *ItemStore) LoadAll() ([]*ItemDef, error) {
+	s.mu.Lock()
+	defer s.mu.Unlock()
 	dir := filepath.Join(s.dataDir, "items")
 	var defs []*ItemDef
 	err := behavior.WalkYAMLDir(dir, func(path, id string, data []byte) error {
@@ -65,12 +71,21 @@ func (s *ItemStore) LoadAll() ([]*ItemDef, error) {
 	return defs, err
 }
 
+// PathIndex returns a copy of the id→path index, safe to iterate concurrently.
 func (s *ItemStore) PathIndex() map[string]string {
-	return s.pathIndex
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	out := make(map[string]string, len(s.pathIndex))
+	for id, p := range s.pathIndex {
+		out[id] = p
+	}
+	return out
 }
 
 func (s *ItemStore) IDSet() map[string]bool {
-	ids := make(map[string]bool)
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	ids := make(map[string]bool, len(s.pathIndex))
 	for id := range s.pathIndex {
 		ids[id] = true
 	}
@@ -78,6 +93,8 @@ func (s *ItemStore) IDSet() map[string]bool {
 }
 
 func (s *ItemStore) Reload(dataDir string) {
+	s.mu.Lock()
+	defer s.mu.Unlock()
 	s.cache = make(map[string]*ItemDef)
 	s.pathIndex = behavior.BuildPathIndex(filepath.Join(dataDir, "items"))
 }
-- 
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