local itemSets = {
	["StormrageRaiment"] = {
		[16899] = true,
		[16900] = true,
		[16901] = true,
		[16902] = true,
		[16903] = true,
		[16904] = true,
		[16897] = true,
		[16898] = true
	},
	["VestmentsOfTranscendence"] = {
		[16919] = true,
		[16920] = true,
		[16921] = true,
		[16922] = true,
		[16923] = true,
		[16924] = true,
		[16925] = true,
		[16926] = true
	},
	["Zul_DRUID"] = {
		[19613] = true,
		[19955] = true,
		[19840] = true,
		[19839] = true,
		[19838] = true
    },
	["Zul_SHAMAN"] = {
		[19609] = true,
		[19956] = true,
		[19830] = true,
		[19829] = true,
		[19828] = true
	},
	["Zul_PALADIN"] = {
		[19952] = true,
		[19588] = true,
		[19827] = true,
		[19826] = true,
		[19825] = true
	}
}

local function IsSetBonusActive(setname, bonusLevel)
	local set = itemSets[setname]
	if not set then return false end
	
    local pieces_equipped = 0
    for slot = 1, 17 do
        local itemID = GetInventoryItemID("player", slot)
        if set[itemID] then pieces_equipped = pieces_equipped + 1 end
    end
    return (pieces_equipped >= bonusLevel)
end

local function _HasSetBonusModifierMP5()
	if classId == ClassIndex.PRIEST then
		return IsSetBonusActive("VestmentsOfTranscendence", 3)
    elseif classId == ClassIndex.DRUID then
		return IsSetBonusActive("StormrageRaiment", 3)
	end

    return false
end

local function MP5FromItems()
    local mp5 = 0
    local classname = select(2, UnitClass("Player"))


    for i = 1, 18 do
        local itemLink = GetInventoryItemLink("player", i)
        if itemLink then
            local stats = GetItemStats(itemLink)
            if stats then
                local statMP5 = stats["ITEM_MOD_POWER_REGEN0_SHORT"]
                if statMP5 then
                    mp5 = mp5 + statMP5 + 1
                end
            end
        end
    end

    -- check if Zul Gurub Set Bonus is active
    if classId == ClassIndex.DRUID or classId == ClassIndex.PALADIN or classId == ClassIndex.SHAMAN then
        if IsSetBonusActive("Zul_" .. classname, 2) then
            mp5 = mp5 + 4
        end
    end

    return mp5
end