İlk commit: Stepstead backend (FastAPI)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

game_logic.py

@@ -0,0 +1,30 @@
+"""
+Oyun mantığı yardımcıları: XP eğrisi, level hesabı.
+"""
+from config import settings
+
+# Her skill için XP eğrisi: level N → toplam XP eşiği
+# Basit kare: 100 * N^2 (level 50 = 250000 XP)
+def xp_threshold_for_level(level: int) -> int:
+    return 100 * level * level
+
+
+def skill_level_from_xp(xp: int) -> int:
+    lvl = 1
+    while lvl < 50 and xp >= xp_threshold_for_level(lvl + 1):
+        lvl += 1
+    return lvl
+
+
+def character_level_from_total_xp(total_xp: int) -> int:
+    # Karakter level: tüm skill XP toplamı eşiği — daha hızlı eğri
+    # Level 1 → 0 XP, Level 50 → 10*250000 = 2.5M XP (zor)
+    # Karakter eğrisi: 500 * N^2
+    lvl = 1
+    while lvl < 50 and total_xp >= 500 * (lvl + 1) * (lvl + 1):
+        lvl += 1
+    return lvl
+
+
+def is_valid_skill(name: str) -> bool:
+    return name in settings.SKILL_NAMES