function RailgunInitilise(_, activator)

    if not activator then
        return
    end
    
    local primaryActive = activator:GetPlayerItemBySlot(0)
    local equippedSecondary = activator:GetPlayerItemBySlot(1)

    if equippedSecondary:GetClassname() == "tf_weapon_smg" then
        activator:WeaponStripSlot(1)
    end

    local ReloadTime = 2
    local primaryMaxClipSize = activator.m_iAmmo[3]
    local ChargeCap = 0
    local RailgunUltCountCharge = 0 
    local isReloading = false

    RailHudText = {
        channel = 3, --Channel number 0 - 5, -- Channel 0 is used to display wave explanation, -- Channel 1 is used to display cash in reverse mvm,
        x = -0.2, -- X coordinate from 0 to 1, -- -1 for center positon, -- Text is wrapped so it does not overflow the screen
        y = 0.75, -- Y coordinate from 0 to 1, -- -1 for center positonText is wrapped so it does not overflow the screen
        effect = 0, -- 0,1 - fade in/fade out text, -- 2 - typeout text
        r1 = 124, -- 0 - 255 range, -- The text is rendered additively, black text will not display
        r2 = 43, -- 0 - 255 range, -- The text is rendered additively, black text will not display
        g1 = 134, -- 0 - 255 range, -- The text is rendered additively, black text will not display
        g2 = 98, -- 0 - 255 range, -- The text is rendered additively, black text will not display
        b1 = 135, -- 0 - 255 range, -- The text is rendered additively, black text will not display
        b2 = 16, -- 0 - 255 range, -- The text is rendered additively, black text will not display
        a1 = 0, -- 0 - 255 range, -- 0 - fully visible, 255 - invisible
        a2 = 0, -- 0 - 255 range, -- 0 - fully visible, 255 - invisible
        fadeinTime = 0, -- Time to fade in text
        fadeoutTime = 0, -- Time to fade out text
        holdTime = 9999, -- Time the text is fully displayed
        fxTime = 0, -- Time to type a single letter with typeout effect
    }

    
    DisplayTextHUD = timer.Create(0.015, function () 

        if activator.m_iClass == 2 then
            activator:ShowHudText(RailHudText, "Railgun Charge: "..ChargeCap)
        end

        if activator.m_iAmmo[3] == 0 and isReloading == false then -- to save on timers, using hud timer as a checker for if primary ammo is empty
            isReloading = true
            ReloadWeapon()
        end
    end, 0)

    --RAILGUN RELOAD LOGIC

    function ReloadWeapon()
        if not IsValid(activator) or not activator:IsAlive() or not IsValid(primaryActive) and isReloading == true then
            return
        end

        local getCurAmmo = primaryActive:GetAttributeValue("maxammo secondary increased")
        
        if getCurAmmo == nil then
            getCurAmmo = 1
        end

        IsMidReload = true

        activator:WeaponSwitchSlot(0)
        activator:SetAttributeValue("disable weapon switch", 1)
        activator:AcceptInput("$DisplayTextCenter", "Reloading..."..ReloadTime, activator)

        ReloadTimer = timer.Create(1, function ()
            ReloadTime = ReloadTime - 1
            --print(ReloadTime)
            activator:AcceptInput("$DisplayTextCenter", "Reloading..."..ReloadTime, activator)
            if ReloadTime == 0 then
                activator.m_iAmmo[3] = primaryMaxClipSize * getCurAmmo
                ReloadTime = 2
                activator:SetAttributeValue("disable weapon switch", nil)
                IsMidReload = false
                isReloading = false
                ReloadTimer = nil
            end
        end, 2)
    end

    local RailReloadCallbacks = activator:AddCallback(ON_KEY_RELEASED, function(user, key)
        
        if not IsValid(activator) or key ~= IN_RELOAD or not user:IsAlive() or not activator:IsAlive() or not IsValid(primaryActive) then
            return
        end

        if activator.m_hActiveWeapon ~= primaryActive then
			return
		end

        local getCurMaxClip = activator.m_iAmmo[3]

        if key == IN_RELOAD and isReloading == false and primaryMaxClipSize > getCurMaxClip then
            activator.m_iAmmo[3] = 0
        end
    end)

    --RAILGUN ALT FIRE LOGIC

    function AddCharge(_,_,caller)

        if caller:InCond(51) or caller:InCond(5) then
            return
        end

        local randomCharge = math.random(1, 3) -- random as to limit the speed of which player gets charge

        ChargeCap = ChargeCap + randomCharge
        

        --print("charged!")
        if ChargeCap >= 100 then
            ChargeCap = 100
        end
    end

    local RailgunAltCallbacks = activator:AddCallback(ON_KEY_RELEASED, function(user2, key2)
        
        if not IsValid(activator) or key2 ~= IN_ATTACK2 or not user2:IsAlive() or not activator:IsAlive() or not IsValid(primaryActive) then
            return
        end

        if activator.m_hActiveWeapon ~= primaryActive then
			return
		end

        if ChargeCap == 0 then
            return
        end

        if key2 == IN_ATTACK2 and ChargeCap > 0 and activator:InCond(46) == false then
            activator:AddCond(46)
            primaryActive:SetAttributeValue("sniper fires tracer HIDDEN", 1)
            primaryActive:SetAttributeValue("fire input on attack", "popscript^$RemoveCharge")
            primaryActive:SetAttributeValue("fire input on kill", "popscript^$AddRailgunKills")
            primaryActive:SetAttributeValue("weapon spread bonus", 0)
            primaryActive:SetAttributeValue("fire rate penalty", 10)
            primaryActive:SetAttributeValue("can headshot", 1)
            primaryActive:SetAttributeValue("damage bonus HIDDEN", ChargeCap / 12.25)
            primaryActive:SetAttributeValue("fire input on hit", nil)
            ChargeCap = 0
        end

        function RemoveCharge()
            activator:RemoveCond(46)
            primaryActive:SetAttributeValue("fire input on kill", nil)
            primaryActive:SetAttributeValue("sniper fires tracer HIDDEN", nil)
            primaryActive:SetAttributeValue("fire input on attack", nil)
            primaryActive:SetAttributeValue("weapon spread bonus", nil)
            primaryActive:SetAttributeValue("fire rate penalty", nil)
            primaryActive:SetAttributeValue("can headshot", nil)
            primaryActive:SetAttributeValue("damage bonus HIDDEN", nil)
            primaryActive:SetAttributeValue("fire input on hit", "popscript^$AddCharge")
        end
    end)

    --RAILGUN CONSTA CHARGE LOGIC

    RailUltTextHud = {
        channel = 4, 
        x = -0.2, 
        y = 0.8, 
        effect = 0,
        r1 = 124, -- 0 - 255 range, -- The text is rendered additively, black text will not display
        r2 = 43, -- 0 - 255 range, -- The text is rendered additively, black text will not display
        g1 = 134, -- 0 - 255 range, -- The text is rendered additively, black text will not display
        g2 = 98, -- 0 - 255 range, -- The text is rendered additively, black text will not display
        b1 = 135, -- 0 - 255 range, -- The text is rendered additively, black text will not display
        b2 = 16, -- 0 - 255 range, -- The text is rendered additively, black text will not display
        a1 = 0, -- 0 - 255 range, -- 0 - fully visible, 255 - invisible
        a2 = 0, -- 0 - 255 range, -- 0 - fully visible, 255 - invisible
        fadeinTime = 0, 
        fadeoutTime = 0,
        holdTime = 9999,
        fxTime = 0, 
    }

    function AddRailgunKills(_,_,caller)

        local callerHealthCommon = math.floor(caller.m_iMaxHealth / 60)
        local callerHealthGiant = math.floor(caller.m_iMaxHealth / 12)

        if caller.m_bIsMiniBoss == 1 then
            RailgunUltCountCharge = RailgunUltCountCharge + callerHealthGiant
        end

        if caller.m_bIsMiniBoss ~= 1 then
            RailgunUltCountCharge = RailgunUltCountCharge + callerHealthCommon
        end

        if RailgunUltCountCharge >= 100 then
            RailgunUltCountCharge = 100
        end
    end

    
    RailgunUlitmateCharge = timer.Create(0.015, function () 

        if activator.m_iClass == 2 then
            activator:ShowHudText(RailUltTextHud, "Overdrive Power: "..RailgunUltCountCharge.."/100%")
        end
    end, 0)

    function ActivateUltimate()
        RailgunUlitmateActive = timer.Create(0.05, function () 

            ChargeCap = ChargeCap + 6
            RailgunUltCountCharge = RailgunUltCountCharge
            if ChargeCap >= 100 then
                ChargeCap = 100
            end
            if RailgunUltCountCharge <= 0 then
                RailgunUltCountCharge = 0
            end
            -- if ChargeCap >= 100 and activator:InCond(46) == false then
            --     ChargeCap = 0
            --     activator:AddCond(46)
            --     primaryActive:SetAttributeValue("sniper fires tracer HIDDEN", 1)
            --     primaryActive:SetAttributeValue("fire input on attack", "popscript^$RemoveCharge")
            --     primaryActive:SetAttributeValue("fire input on kill", "popscript^$AddRailgunKills")
            --     primaryActive:SetAttributeValue("weapon spread bonus", 0)
            --     primaryActive:SetAttributeValue("fire rate penalty", 10)
            --     primaryActive:SetAttributeValue("can headshot", 1)
            --     primaryActive:SetAttributeValue("damage bonus HIDDEN", ChargeCap / 12.25)
            --     primaryActive:SetAttributeValue("fire input on hit", nil)
            -- end
        end, 0)

        RailgunUlitmateTimeActive = timer.Create(1, function () 

            RailgunUltCountCharge = RailgunUltCountCharge - 7.5
            if RailgunUltCountCharge <= 0 then
                timer.Stop(RailgunUlitmateActive)
                timer.Stop(RailgunUlitmateTimeActive)
                RailgunUltCountCharge = 0
            end
        end, 0)
    end


    local RailUltimateCallbacks = activator:AddCallback(ON_KEY_RELEASED, function(user3, key3)
        
        if not IsValid(activator) or key3 ~= IN_DUCK or not user3:IsAlive() or not activator:IsAlive() or not IsValid(primaryActive) then
            return
        end

        if activator.m_hActiveWeapon ~= primaryActive then
			return
		end

        if key3 == IN_DUCK and RailgunUltCountCharge == 100 then
            ActivateUltimate()
        end
    end)

    --RAILGUN ABILITY LOGIC

    local isSlideReadyTime = 0
    local IsAbilityReeady = true
    SlideHudText = {
        channel = 5, --Channel number 0 - 5, -- Channel 0 is used to display wave explanation, -- Channel 1 is used to display cash in reverse mvm,
        x = -0.2, -- X coordinate from 0 to 1, -- -1 for center positon, -- Text is wrapped so it does not overflow the screen
        y = 0.85, -- Y coordinate from 0 to 1, -- -1 for center positonText is wrapped so it does not overflow the screen
        effect = 0, -- 0,1 - fade in/fade out text, -- 2 - typeout text
        r1 = 124, -- 0 - 255 range, -- The text is rendered additively, black text will not display
        r2 = 43, -- 0 - 255 range, -- The text is rendered additively, black text will not display
        g1 = 134, -- 0 - 255 range, -- The text is rendered additively, black text will not display
        g2 = 98, -- 0 - 255 range, -- The text is rendered additively, black text will not display
        b1 = 135, -- 0 - 255 range, -- The text is rendered additively, black text will not display
        b2 = 16, -- 0 - 255 range, -- The text is rendered additively, black text will not display
        a1 = 0, -- 0 - 255 range, -- 0 - fully visible, 255 - invisible
        a2 = 0, -- 0 - 255 range, -- 0 - fully visible, 255 - invisible
        fadeinTime = 0, -- Time to fade in text
        fadeoutTime = 0, -- Time to fade out text
        holdTime = 9999, -- Time the text is fully displayed
        fxTime = 0, -- Time to type a single letter with typeout effect
    }

    local RailAbilityCallback = activator:AddCallback(ON_KEY_RELEASED, function(user4, key4)
        
        if not IsValid(activator) or key4 ~= IN_ATTACK3 or not user4:IsAlive() or not activator:IsAlive() or not IsValid(primaryActive) then
            return
        end

        if activator.m_hActiveWeapon ~= primaryActive then
			return
		end

        local slideTotalX = activator.m_vecVelocity[1]
        local slideTotalY = activator.m_vecVelocity[2]
        local slideTotalZ = activator.m_vecVelocity[3]
        local slide = Vector(slideTotalX * 2, slideTotalY * 2, slideTotalZ * 2)

        if key4 == IN_ATTACK3 and IsAbilityReeady == true then
            IsAbilityReeady = false
            isSlideReadyTime = 8
            activator:AddCond(51)
            activator:AddCond(64)
            activator:SetAttributeValue("no_attack", 1)
            activator:SetAttributeValue("ignored by enemy sentries", 1)
            activator:SetAttributeValue("ignored by bots", 1)
            VeloctiyTimer = timer.Create(0.005, function () 

                activator:SetLocalVelocity(slide)
            end, 5)
        end
    end)
    
    SlideHudTimer = timer.Create(0.015, function () 

        if activator.m_iClass == 2 then
            activator:ShowHudText(SlideHudText, "Dash cooldown: "..isSlideReadyTime)
        end
    end, 0)

    AbilityIsReady = timer.Create(1, function () 
        isSlideReadyTime = isSlideReadyTime - 1
        if isSlideReadyTime <= 5 then
            activator:RemoveCond(64)
            activator:RemoveCond(51)
            activator:SetAttributeValue("no_attack", nil)
            activator:SetAttributeValue("ignored by enemy sentries", nil)
            activator:SetAttributeValue("ignored by bots", nil)
        end
        if isSlideReadyTime <= 0 then
            IsAbilityReeady = true
            isSlideReadyTime = 0
        end
    end, 0)

    -- function StealthModeActive()
    --     CannotUseStealth = false
    --     local StealthTime = 4
    --     activator:AddCond(64)

    --     RailgunUlitmateTimeActive = timer.Create(1, function () 

    --         StealthTime = StealthTime - 1
    --         if StealthTime == 0 then
    --             activator:RemoveCond(64)
    --             isSlideReadyTime = 5
    --         end
    --     end, 0)
    -- end

end

function OnWaveInit(wave)
    ReloadTimer = nil
    RailgunUlitmateActive = nil
    RailgunUlitmateTimeActive = nil
    AbilityIsReady = nil
    RailgunUlitmateCharge = nil
    ChargeCap = 0
end