package GuardDevilUnbreakable
    import DamageType
    import StructuredDD
    import ClosureTimers
    import Players
    import Invulnerable
 
    constant int ID_GUARD_DEVIL         = 'h03B'
    constant int ID_GUARD_DEVIL_GREATER = 'h03C'
    constant int ID_ABILITY_UNBREAKABLE = 'A01W'
    constant int ID_ABILITY_UNBREAKA_CD = 'A01X'
    constant int ID_INVULNERABLE        = 'Avul'
 
    constant real RADIUS   = 600.
    constant real DURATION =   1.
    constant real COOLDOWN =  60.
 
    constant string SHIELD_FX = "Abilities\\Spells\\Human\\DivineShield\\DivineShieldTarget.mdl"
 
    group grp = CreateGroup()
 
    function isGuardDevil(unit u) returns bool
        return u.getTypeId() == ID_GUARD_DEVIL or u.getTypeId() == ID_GUARD_DEVIL_GREATER
    end
 
    function findUnbreakable(unit u) returns unit
        unit guard = null
        unit iter
 
        grp.enumUnitsInRange(vec2(u.getX(), u.getY()), RADIUS)
        loop
            iter = FirstOfGroup(grp)
            exitwhen iter == null
 
            if iter.isAlive() and isGuardDevil(iter) and iter.hasAbility(ID_ABILITY_UNBREAKABLE)
                guard = iter
            end
 
            grp.removeUnit(iter)
        end
 
        return guard
    end
 
    function h()
        unit tU     = GetTriggerUnit()
        real damage = GetEventDamage()
 
        if tU.getOwner().getId() < Players.COUNT and DamageType.get() == DamageType.ATTACK and (tU.getHP() - damage < 1.) and not tU.hasAbility(ID_INVULNERABLE)
            unit unbreakableSource = findUnbreakable(tU)
 
            if unbreakableSource != null
                Invulnerable.apply(tU, DURATION)
                unbreakableSource.removeAbility(ID_ABILITY_UNBREAKABLE)
                unbreakableSource.addAbility(   ID_ABILITY_UNBREAKA_CD)
                effect shield = tU.addEffect(SHIELD_FX, "origin")
 
                doAfter(DURATION, () -> begin
                    shield.destr()
                end)
 
                doAfter(COOLDOWN, () -> begin
                    unbreakableSource.addAbility(   ID_ABILITY_UNBREAKABLE)
                    unbreakableSource.removeAbility(ID_ABILITY_UNBREAKA_CD)
                end)
            end
        end
    end
 
    init
        StructuredDD.addHandler(function h)
    end

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