Damage calculation including elemental buff/resistance

src/system/stats/DamageCalculator.cs

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+using Godot;
+
+namespace GameJamDungeon
+{
+  public static class DamageCalculator
+  {
+    public static double CalculatePlayerDamage(int attackDamage, PlayerStatInfo playerStatInfo, EnemyStatInfo enemyStatInfo)
+    {
+      var baseDamage = attackDamage + playerStatInfo.BaseAttack;
+      var elementADamage = (playerStatInfo.BaseElementADamageBonus > 0 ? playerStatInfo.BaseElementADamageBonus - enemyStatInfo.ElementAResistance : 0) / 100;
+      var elementBDamage = (playerStatInfo.BaseElementBDamageBonus > 0 ? playerStatInfo.BaseElementBDamageBonus - enemyStatInfo.ElementBResistance : 0) / 100;
+      var elementCDamage = (playerStatInfo.BaseElementCDamageBonus > 0 ? playerStatInfo.BaseElementCDamageBonus - enemyStatInfo.ElementCResistance : 0) / 100;
+      var elementalBonusDamage = baseDamage + (baseDamage * elementADamage) + (baseDamage * elementBDamage) + (baseDamage * elementCDamage);
+      var calculatedDamage = elementalBonusDamage - enemyStatInfo.BaseDefense;
+      return calculatedDamage;
+    }
+  }
+}

src/system/stats/ICharacterStats.cs

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+namespace GameJamDungeon
+{
+  public interface ICharacterStats
+  {
+    public double MaximumHP { get; }
+
+    public int BaseAttack { get; }
+
+    public int BaseDefense { get; }
+
+    public double ElementAResistance { get; }
+
+    public double ElementBResistance { get; }
+
+    public double ElementCResistance { get; }
+  }
+}