Header

    globals
        BuffType stern_slowBuffCS
        MultiboardValues stern_stormPowerMB
    endglobals
    
    //Do not remove or rename this function!
    //Put your initialization tasks here, this function will be called on map init
    
    function strongWindOnCreate takes Buff b returns nothing
        set b.userInt = 0 //will be used to store buff level
        set b.userInt2 = 0 // counts number of stacks
        set b.userReal = 0.0 //records movespeed stolen (in case aura has levelled)
        set b.userReal2 = 0.03 //stores slow factor, so that we don't need to recalculate it every second
    endfunction
    
    function strongWindPeriodic takes Buff b returns nothing
        local Tower caster = b.getCaster()
        local Unit creep = b.getBuffedUnit()
        local integer buffLevel = b.getLevel()
        // local unit u = caster.getUnit()
        
        //Check if aura level hasn't changed
        if buffLevel != b.userInt then
            set b.userInt = buffLevel
            //Give creep back its old movespeed and calculate new slow factor.
            set b.userReal2 = 0.03 + 0.0008 * buffLevel
            if (creep.getSize() == SIZE_AIR) then
                set b.userReal2 = b.userReal2 * 2
            endif
            
            //Adjust movespeed accordingly
            call creep.modifyProperty(MOD_MOVESPEED, b.userReal - b.userReal2 * b.userInt2)
            set b.userReal = b.userReal2 * b.userInt2
        endif
        
        //Apply slow
        if b.userInt2 < 15 then //Max 15 stacks
            //Add slow
            set b.userInt2 = b.userInt2 + 1
            call creep.modifyProperty(MOD_MOVESPEED, -b.userReal2)
            set b.userReal = b.userReal + b.userReal2
        endif
        
        //Deal damage
        call caster.doAttackDamage(creep, b.userReal * 10 * caster.getCurrentAttackDamageWithBonus() * (1 + 0.05 * buffLevel + 0.0005 * caster.userInt), caster.calcAttackMulticrit(0,0,0))
        // method displayFloatingText takes string whichText, Unit whichUnit, integer red, integer green, integer blue returns nothing
        // call caster.getOwner().displayFloatingText(R2S(1 + 0.05 * buffLevel + 0.0005 * caster.userInt), caster, 200, 0, 0)
        // call caster.getOwner().displayFloatingText(R2S(b.userReal), caster, 0, 200, 0)
        
        // userReal 0.01 -> 0.02 -> *100   10% of damage  -> *10 total
        // call caster.getOwner().displayFloatingText(R2S(b.userReal * 10 * caster.getCurrentAttackDamageWithBonus() * (1 + 0.05 * buffLevel + 0.0005 * caster.userInt)), creep, 200, 0, 0)
    endfunction
    
    function strongWindOnCleanup takes Buff b returns nothing
        local Tower caster = b.getCaster()
        local Unit creep = b.getBuffedUnit()
        if (GetUnitState(creep.getUnit(), UNIT_STATE_LIFE) > 0) then
            //Give creep its movespeed back
            call creep.modifyProperty(MOD_MOVESPEED, b.userReal)
        else
            // creep died under the effect? Increse storm power!
            set caster.userInt = caster.userInt + 1
            // + mana
            call caster.subtractMana(-35,true)
        endif

    endfunction
    
    private function init takes nothing returns nothing
        set stern_slowBuffCS = BuffType.createAuraEffectType(false)
        call stern_slowBuffCS.setBuffIcon('@@0@@')
        call stern_slowBuffCS.addEventOnCreate(strongWindOnCreate)
        call stern_slowBuffCS.addPeriodicEvent(strongWindPeriodic, 1.0)
        call stern_slowBuffCS.addEventOnCleanup(strongWindOnCleanup)
        
        set stern_stormPowerMB = MultiboardValues.create(1)
        call stern_stormPowerMB.setKey(0,"Storm Power")
    endfunction

On Attack

function onAttack takes Tower tower returns nothing
    
    local Unit creep = Event.getTarget()
    local real x = creep.getX()
    local real y = creep.getY()
    local integer numCreeps = 0
    local integer lvl = tower.getLevel()
    local Creep curCreep
    local Iterate creepsInRange
    local real bonusSpellCrit = 0.0
    local real mod
    local real airBonus = 1.0
    local unit towerUnit = tower.getUnit()
    local real mana = GetUnitState(towerUnit, UNIT_STATE_MANA)
    
    if tower.calcChance(0.25 + 0.0125 * lvl + tower.userInt * 0.0002) and tower.subtractMana(100, false) == 100 then
        // remove Mana
        // First Iteration
        // for damage -> count creeps (save in: numCreeps)
        
        set creepsInRange = Iterate.overUnitsInRangeOfUnit(tower, TARGET_CREEPS, creep, 350)
        loop
            set curCreep = creepsInRange.next()
            exitwhen curCreep == 0
            set numCreeps = numCreeps + 1
        endloop
        
        // do effects
        call Effect.createSimple("Abilities\\Spells\\Human\\Thunderclap\\ThunderClapCaster.mdl", x, y).destroy()
        call Effect.createSimple("Abilities\\Spells\\NightElf\\Cyclone\\CycloneTarget.mdl", x, y).destroy()
        call Effect.createSimple("Abilities\\Spells\\Other\\Drain\\ManaDrainTarget.mdl", x, y).setLifetime(1)
        
        //Adjust ratios against air.
        if (SIZE_AIR == creep.getSize()) then
            set bonusSpellCrit = 0.25
            set airBonus = 2.0
        endif
        call tower.doSpellDamageAoEUnit(creep, 350, numCreeps * airBonus * (200 + lvl * 65), tower.calcSpellCritNoBonus() + bonusSpellCrit,0)
        
        // weaken creeps (weakening is divided by the number of creeps hit)
        set creepsInRange = Iterate.overUnitsInRangeOfUnit(tower, TARGET_CREEPS, creep, 350)
        set mod = (0.02 + 0.0012 * lvl) * numCreeps
        loop
            set curCreep = creepsInRange.next()
            exitwhen curCreep == 0
            call curCreep.modifyProperty(MOD_DMG_FROM_STORM, mod)
            call curCreep.modifyProperty(MOD_DMG_FROM_ICE, mod)
            call curCreep.modifyProperty(MOD_DMG_FROM_ASTRAL, mod)
        endloop
    endif
    set towerUnit = null
endfunction

On Tower Creation

function onCreate takes Tower tower returns nothing
    set tower.userInt = 0 //Storm Power
endfunction

On Tower Details

function onTowerDetails takes Tower tower returns MultiboardValues
    call stern_stormPowerMB.setValue(0, I2S(tower.userInt))
    return stern_stormPowerMB
endfunction

Tower Aura