Percentage-based mana regeneration

Hota-like mysticism.

Bonus FULL_MANA_REGENERATION (Wizard well) has been replaced with
MANA_PERCENTAGE_REGENERATION bonus. Wizard well now has new bonus with
100% value.

AI/Nullkiller/AIUtility.cpp

@@ -410,9 +410,9 @@ double getArtifactBonusRelevance(const CGHeroInstance * hero, const std::shared_
 			if (bonus->subtype == BonusCustomSubtype::damageTypeMelee)
 				return veryRelevant * (1 - getArmyPercentageWithBonus(BonusType::SHOOTER));
 			return 0;
-		case BonusType::FULL_MANA_REGENERATION:
+		case BonusType::MANA_PERCENTAGE_REGENERATION:
 		case BonusType::MANA_REGENERATION:
-			return hero->mana < hero->manaLimit() ? relevant : notRelevant;
+			return hero->hasSpellbook() ? relevant : notRelevant;
 		case BonusType::LEARN_BATTLE_SPELL_CHANCE:
 			return hero->hasBonusOfType(BonusType::LEARN_BATTLE_SPELL_LEVEL_LIMIT) ? relevant : notRelevant;
 		case BonusType::NO_DISTANCE_PENALTY:
@@ -483,8 +483,8 @@ int32_t getArtifactBonusScoreImpl(const std::shared_ptr<Bonus> & bonus)
 			return 0;
 		case BonusType::CREATURE_GROWTH:
 			return (1+bonus->subtype.getNum()) * bonus->val * 400;
-		case BonusType::FULL_MANA_REGENERATION:
-			return 15000;
+		case BonusType::MANA_PERCENTAGE_REGENERATION:
+			return bonus->val * 150;
 		case BonusType::MANA_REGENERATION:
 			return bonus->val * 500;
 		case BonusType::SPELLS_OF_SCHOOL:

config/artifacts.json

@@ -2219,8 +2219,8 @@
 	{
 		"bonuses" : {
 			"mana" : {
-				"type" : "FULL_MANA_REGENERATION",
-				"val" : 0,
+				"type" : "MANA_PERCENTAGE_REGENERATION",
+				"val" : 100,
 				"valueType" : "BASE_NUMBER"
 			}
 		},

docs/modders/Bonus/Bonus_Types.md

@@ -105,9 +105,11 @@ Restores specific amount of mana points for affected heroes on new turn
 
 - val: amount of spell points to restore
 
-### FULL_MANA_REGENERATION
+### MANA_PERCENTAGE_REGENERATION
 
-Restores entire mana pool for affected heroes on new turn
+Restores specific percentage of mana pool for affected heroes on new turn. If hero has both MANA_REGENERATION and MANA_PERCENTAGE_REGENERATION, only bonus that gives more mana points will be active
+
+- val: percentage of spell points to restore
 
 ### NONEVIL_ALIGNMENT_MIX
 

lib/bonuses/BonusEnum.h

@@ -24,7 +24,7 @@ class JsonNode;
 	BONUS_NAME(PRIMARY_SKILL) /*uses subtype to pick skill; additional info if set: 1 - only melee, 2 - only distance*/  \
 	BONUS_NAME(SIGHT_RADIUS) \
 	BONUS_NAME(MANA_REGENERATION) /*points per turn*/  \
-	BONUS_NAME(FULL_MANA_REGENERATION) /*all mana points are replenished every day*/  \
+	BONUS_NAME(MANA_PERCENTAGE_REGENERATION) /*all mana points are replenished every day*/  \
 	BONUS_NAME(NONEVIL_ALIGNMENT_MIX) /*good and neutral creatures can be mixed without morale penalty*/  \
 	BONUS_NAME(SURRENDER_DISCOUNT) /*%*/  \
 	BONUS_NAME(STACKS_SPEED)  /*additional info - percent of speed bonus applied after direct bonuses; >0 - added, <0 - subtracted to this part*/ \

lib/mapObjects/CGHeroInstance.cpp

@@ -1067,10 +1067,11 @@ int CGHeroInstance::getSightRadius() const
 
 si32 CGHeroInstance::manaRegain() const
 {
-	if (hasBonusOfType(BonusType::FULL_MANA_REGENERATION))
-		return manaLimit();
+	int percentageRegeneration = valOfBonuses(BonusType::MANA_PERCENTAGE_REGENERATION);
+	int regeneratedByPercentage = manaLimit() * percentageRegeneration / 100;
+	int regeneratedByValue = valOfBonuses(BonusType::MANA_REGENERATION);
 
-	return valOfBonuses(BonusType::MANA_REGENERATION);
+	return std::max(regeneratedByValue, regeneratedByPercentage);
 }
 
 si32 CGHeroInstance::getManaNewTurn() const