math.round = function(num, decimals)
	if (not decimals or decimals <= 0) then
		return math.floor(num + 0.5)
	else
		local mod = 10 ^ decimals
		return math.floor((num * mod) + 0.5) / mod
	end
end

function ReloadOnHit(damage, activator, caller)

	if not caller:IsValid() then return end
	if ( not caller:IsBot() ) and ( not caller:IsObject() ) and ( not caller:IsNPC() ) then return end
	if caller.m_iTeamNum == 1 then return end
	
	if caller.m_iTeamNum == activator.m_iTeamNum then
		return
	end		

	local upgradeLevel = nil
	
	if activator:GetPlayerItemBySlot(0):GetAttributeValue("purchased") ~= nil then
		
		upgradeLevel = activator:GetPlayerItemBySlot(0):GetAttributeValue("purchased")
		
	elseif 	activator:GetPlayerItemBySlot(1):GetAttributeValue("purchased") ~= nil then
	
		upgradeLevel = activator:GetPlayerItemBySlot(1):GetAttributeValue("purchased")
		
	elseif	activator:GetPlayerItemBySlot(2):GetAttributeValue("purchased") ~= nil then
	
		upgradeLevel = activator:GetPlayerItemBySlot(2):GetAttributeValue("purchased")
		
	end	
	
	if upgradeLevel == nil then
		return
	end
	
	local BASE_CLIP = 4

	local weapon = activator:GetPlayerItemBySlot(0)
	
	if IsValid( activator:GetPlayerItemBySlot(0) ) and ( activator:GetPlayerItemBySlot(0):GetItemName() == "Sticky Situation" ) then
		weapon = activator:GetPlayerItemBySlot(0)
		BASE_CLIP = 4
	else
		weapon = activator:GetPlayerItemBySlot(1)
		BASE_CLIP = 8
	end
	
		if IsValid(weapon) and ( weapon:GetItemName() ~= "The Cow Mangler 5000" ) then

			local clipBonusMult = weapon:GetAttributeValueByClass("mult_clipsize", 1)
			local clipBonusMult = clipBonusMult * weapon:GetAttributeValueByClass("mult_clipsize_upgrade", 1)

			local clipBonusAtomic = weapon:GetAttributeValueByClass("mult_clipsize_upgrade_atomic", 0)

			local airstrikeKills = 0
			
			local overloadRefundAmount = 0
		
		
			if weapon:GetItemName() == "The Air Strike" then
				airstrikeKills = activator.m_Shared.m_iDecapitations + 1
			end
		
			local maxClip = math.round( ( BASE_CLIP * clipBonusMult ) + clipBonusAtomic + airstrikeKills, 0 )
			if activator:IsRealPlayer() == true then
				activator.m_iAmmo[TF_AMMO_weapon] = activator.m_iAmmo[TF_AMMO_weapon] - upgradeLevel
				if activator.m_iAmmo[TF_AMMO_weapon] < 0 then
					upgradeLevel = upgradeLevel + activator.m_iAmmo[TF_AMMO_weapon]
					activator.m_iAmmo[TF_AMMO_weapon] = 0
				end
			end
			weapon.m_iClip1 = weapon.m_iClip1 + upgradeLevel
			
			if weapon.m_iClip1 > maxClip then
				overloadRefundAmount = weapon.m_iClip1 - maxClip
				overloadRefundAmount = overloadRefundAmount + upgradeLevel
				activator.m_iAmmo[TF_AMMO_weapon] = activator.m_iAmmo[TF_AMMO_weapon] + overloadRefundAmount
				weapon.m_iClip1 = maxClip
			end
		else

			local clipBonusMult = weapon:GetAttributeValueByClass("mult_clipsize_upgrade", 1)


			local maxClip = (BASE_CLIP * 5) * clipBonusMult

			weapon.m_flEnergy = weapon.m_flEnergy + ( ( maxClip * upgradeLevel ) )
			if weapon.m_flEnergy > maxClip then

				weapon.m_flEnergy = maxClip

			end
			
			if ( weapon.m_flEnergy / 5 ) ~= ( math.floor( weapon.m_flEnergy / 5 ) ) then
				local newClip = math.max( math.round( weapon.m_flEnergy / 100, 1 ), 5 ) --gotta love number theory
				newClip = newClip * 100
				weapon.m_flEnergy = newClip
				
				--How this works: lets say energy = 47
				--47/5 ~= floor(47/5)
				--47/100 = 0.47
				--round to nearest tenth: 0.5
				--* by 100 to undo /: 50
				--energy = 50
				--note that this is called after adding, this can make it go from 45 -> 60 when upgradeLevel = 0.2
			end
		end	
end