Fix gem level behaviour of support granted skills

spec/System/TestSkills_spec.lua

@@ -909,6 +909,36 @@ describe("TestSkills", function()
 		assert.are.equals(warcryFirstDps, supportFirstDps)
 	end)
 
+	it("support-granted active skills inherit tree gem levels from the linked skill", function()
+		build.skillsTab:PasteSocketGroup("Despair 20/0  1\nDoedre's Undoing 1/0  1")
+		local socketGroup = build.skillsTab.socketGroupList[#build.skillsTab.socketGroupList]
+		recalculate()
+		local darkConsequences = selectActiveSkillById(socketGroup, "ChaosFrogExplosionPlayer")
+		assert.is_not_nil(darkConsequences)
+		assert.are.equals(20, darkConsequences.activeEffect.level)
+		assert.are.equals(20, build.calcsTab.mainOutput.GemLevel)
+		local baseDamage = build.calcsTab.mainOutput.AverageDamage
+
+		local chaosMasteryNode = build.spec.nodes[63074]
+		assert.are.equals("Dark Entries", chaosMasteryNode.dn)
+		assert.are.equals("+1 to Level of all Chaos Skills", chaosMasteryNode.sd[1])
+		chaosMasteryNode.alloc = true
+		build.spec.allocNodes[chaosMasteryNode.id] = chaosMasteryNode
+		recalculate()
+
+		darkConsequences = selectActiveSkillById(socketGroup, "ChaosFrogExplosionPlayer")
+		-- the support gem also matches "all Chaos Skills", but its own gem level modifiers
+		-- must not stack on top of the level inherited from Despair
+		assert.are.equals(21, darkConsequences.activeEffect.level)
+		assert.are.equals(21, build.calcsTab.mainOutput.GemLevel)
+		assert.True(build.calcsTab.mainOutput.AverageDamage > baseDamage)
+
+		local calcFunc, calcBase = build.calcsTab:GetMiscCalculator()
+		local withoutNode = calcFunc({ removeNodes = { [chaosMasteryNode] = true } })
+		assert.are.equals(21, calcBase.GemLevel)
+		assert.are.equals(20, withoutNode.GemLevel)
+		assert.True(withoutNode.AverageDamage < calcBase.AverageDamage)
+	end)
 	it("Flame Breath attack speed scales DPS and is not capped by its channel cooldown", function()
 		build.itemsTab:CreateDisplayItemFromRaw([[
 			New Item
@@ -2228,5 +2258,5 @@ describe("TestSkills", function()
 		local noParrySpellDmg = build.calcsTab.mainOutput.AverageDamage
 		assert.equals(withParrySpellDmg, noParrySpellDmg, "Parry should not affect spell damage")
 	end)
-	
+
 end)

src/Modules/CalcActiveSkill.lua

@@ -437,10 +437,15 @@ function calcs.buildActiveSkillModList(env, activeSkill)
 		skillFlags = activeEffect.statSet.skillFlags
 	end
 	-- Active skills granted by support gems inherit the level of the skill that support applied to.
+	local supportGrantedInheritedLevel
 	if activeEffect.gemData and activeEffect.gemData.grantedEffect.support then
-		for _, supportEffect in ipairs(activeSkill.supportList) do
-			if supportEffect.srcInstance == activeEffect.srcInstance and supportEffect.activeSkillLevel then
-				activeEffect.level = supportEffect.activeSkillLevel
+		for _, skill in ipairs(env.player.activeSkillList) do
+			local effect = skill.activeEffect
+			if effect ~= activeEffect and effect.level and skill.socketGroup == activeSkill.socketGroup
+				and not (effect.gemData and effect.gemData.grantedEffect.support) then
+				supportGrantedInheritedLevel = effect.level
+				activeEffect.level = effect.level
+				activeSkill.skillData.inheritsGemLevel = true
 				break
 			end
 		end
@@ -770,7 +775,9 @@ function calcs.buildActiveSkillModList(env, activeSkill)
 	end
 
 	-- Apply gem/quality modifiers from support gems
-	skillModList:NewMod("GemLevel", "BASE", activeSkill.activeEffect.srcInstance and activeSkill.activeEffect.srcInstance.level or activeSkill.activeEffect.level, "Max Level")
+	local gemMaxLevel = supportGrantedInheritedLevel or (activeSkill.activeEffect.srcInstance and activeSkill.activeEffect.srcInstance.level) or activeSkill.activeEffect.level
+	local gemMaxLevelSource = supportGrantedInheritedLevel and "Inherited Max Level" or "Max Level"
+	skillModList:NewMod("GemLevel", "BASE", gemMaxLevel, gemMaxLevelSource)
 	if activeSkill.activeEffect.srcInstance and activeSkill.activeEffect.srcInstance.corrupted and not (activeSkill.activeEffect.srcInstance.fromItem or activeSkill.activeEffect.srcInstance.fromTree or activeSkill.activeEffect.grantedEffect.fromItem or activeSkill.activeEffect.grantedEffect.fromTree) then
 		skillModList:NewMod("GemCorruptionLevel", "BASE", activeSkill.activeEffect.srcInstance.corruptLevel, "Corruption")
 		activeSkill.skillCfg.skillCond["GemCorrupted"] = true

src/Modules/CalcPerform.lua

@@ -3658,22 +3658,26 @@ function calcs.perform(env, skipEHP)
 			local totalSupportLevel = mainSkill.skillModList:Sum("BASE", mainSkill.skillCfg, "GemSupportLevel")
 			local totalCorruptionLevel = mainSkill.skillModList:Sum("BASE", mainSkill.skillCfg, "GemCorruptionLevel")
 
+			local inheritsLevel = mainSkill.skillData.inheritsGemLevel
 			output.GemHasLevel = true
-			output.GemLevel = m_max(baseLevel + totalSupportLevel + totalItemLevel + totalCorruptionLevel, 1)
+			output.GemLevel = m_max(inheritsLevel and baseLevel or (baseLevel + totalSupportLevel + totalItemLevel + totalCorruptionLevel), 1)
 
 			if env.player.breakdown then
 				env.player.breakdown.GemLevel = {}
 				t_insert(env.player.breakdown.GemLevel, s_format("%d ^8(level from gem)", baseLevel))
-				if totalSupportLevel > 0 then
-					t_insert(env.player.breakdown.GemLevel, s_format("+ %d ^8(level from support)", totalSupportLevel))
-				end
-				if totalItemLevel > 0 then
-					t_insert(env.player.breakdown.GemLevel, s_format("+ %d ^8(level from items)", totalItemLevel))
-				end
-				if totalCorruptionLevel > 0 then
-					t_insert(env.player.breakdown.GemLevel, s_format("+ %d ^8(level from corruption)", totalCorruptionLevel))
-				elseif totalCorruptionLevel < 0 then
-					t_insert(env.player.breakdown.GemLevel, s_format("%d ^8(level from corruption)", totalCorruptionLevel))
+				-- support gems inherit levels from the parent gem, which means showing level modifiers is pointless
+				if not inheritsLevel then
+					if totalSupportLevel > 0 then
+						t_insert(env.player.breakdown.GemLevel, s_format("+ %d ^8(level from support)", totalSupportLevel))
+					end
+					if totalItemLevel > 0 then
+						t_insert(env.player.breakdown.GemLevel, s_format("+ %d ^8(level from items)", totalItemLevel))
+					end
+					if totalCorruptionLevel > 0 then
+						t_insert(env.player.breakdown.GemLevel, s_format("+ %d ^8(level from corruption)", totalCorruptionLevel))
+					elseif totalCorruptionLevel < 0 then
+						t_insert(env.player.breakdown.GemLevel, s_format("%d ^8(level from corruption)", totalCorruptionLevel))
+					end
 				end
 				t_insert(env.player.breakdown.GemLevel, s_format("= %d", output.GemLevel))
 			end

src/Modules/CalcSections.lua

@@ -698,7 +698,7 @@ return {
 } }
 } },
 { 1, "SkillTypeStats", 1, colorCodes.OFFENCE, {{ defaultCollapsed = false, label = "Skill type-specific Stats", data = {
-	{ label = "Gem Level", notFlag = "thorns", haveOutput = "GemHasLevel", { format = "{0:output:GemLevel}", { breakdown = "GemLevel" }, { modName = { "GemLevel" }, cfg = "skill" },{ modName = { "GemSupportLevel" }, cfg = "skill" }, { modName = { "GemItemLevel" }, cfg = "skill" }, { modName = { "GemCorruptionLevel" }, cfg = "skill" } }, },
+	{ label = "Gem Level", notFlag = "thorns", haveOutput = "GemHasLevel", { format = "{0:output:GemLevel}", { breakdown = "GemLevel" }, { modName = { "GemLevel" }, cfg = "skill" }, { modName = { "GemSupportLevel" }, cfg = "skill", notSkillData = "inheritsGemLevel" }, { modName = { "GemItemLevel" }, cfg = "skill", notSkillData = "inheritsGemLevel" }, { modName = { "GemCorruptionLevel" }, cfg = "skill", notSkillData = "inheritsGemLevel" } }, },
 	{ label = "Spirit Cost", color = colorCodes.SPIRIT, haveOutput = "SpiritHasCost", { format = "{0:output:SpiritCost}", { breakdown = "SpiritCost" }, { modName = { "SpiritCost", "Cost", "SpiritCostNoMult" }, cfg = "skill" }, }, },
 	{ label = "Spirit % Cost", color = colorCodes.SPIRIT, haveOutput = "SpiritPercentHasCost", { format = "{0:output:SpiritPercentCost}", { breakdown = "SpiritPercentCost" }, { modName = { "SpiritCost", "Cost", "SpiritCostNoMult" }, cfg = "skill" }, }, },
 	{ label = "Mana Cost", color = colorCodes.MANA, haveOutput = "ManaHasCost", { format = "{0:output:ManaCost}", { breakdown = "ManaCost" }, { modName = { "ManaCost", "Cost", "ManaCostNoMult" }, cfg = "skill" }, }, },

src/Modules/CalcSetup.lua

@@ -2454,8 +2454,18 @@ function calcs.initEnv(build, mode, override, specEnv)
 			t_insert(env.player.activeSkillList, env.player.mainSkill)
 		end
 
+		-- some active skills, like those granted by support gems depend on the stats of other gems,
+		-- which means we have to do them last.
+		local deferredActiveSkills = {}
 		-- Build skill modifier lists
 		for _, activeSkill in pairs(env.player.activeSkillList) do
+			if activeSkill.activeEffect.gemData and activeSkill.activeEffect.gemData.grantedEffect.support then
+				table.insert(deferredActiveSkills, activeSkill)
+			else
+				calcs.buildActiveSkillModList(env, activeSkill)
+			end
+		end
+		for _, activeSkill in ipairs(deferredActiveSkills) do
 			calcs.buildActiveSkillModList(env, activeSkill)
 		end