[Scripting Question] How to make an item like potion,, energy powder, moomoo milk and etc consumable in battle via an ability?

[Briochee]

Anyone knows how to make an item like potion,, energy powder, moomoo milk and etc consumable in battle via an ability so it can be triggered in battle when the HP goes below half only if a Pokemon knows this specific ability? I'm like 3 hours trying to make this work, I asked for a friends help and nothing :frowning:

This is what I have right now, but it's not working

BattleHandlers::AbilityOnHPDroppedBelowHalf.add(:HERBALIST,
proc { |ability,battler,battle|
next if ![:ENERGYPOWDER, :ENERGYROOT,:SUPERHERB, :HEALPOWDER].include?(battler.item)
amt = 0
case battler.item
when :ENERGYPOWDER; amt = 50
when :ENERGYROOT; amt = 200
when :SUPERHERB; amt = 999
end
if amt > 0
next if battler.hp == battler.totalhp
battle.pbShowAbilitySplash(battler)
battler.pbRecoverHP(amt)
if PokeBattle_SceneConstants::USE_ABILITY_SPLASH
battle.pbDisplay(_INTL("{1}'s HP was restored.",battler.pbThis))
else
battle.pbDisplay(_INTL("{1}'s {2} restored its HP.",battler.pbThis,battler.abilityName))
end
battler.changeHappiness("superherb") if battler.item == :SUPERHERB
else
next if battler.status == :NONE
battle.pbShowAbilitySplash(battler)
battler.heal_status
battler.changeHappiness("powder")
battle.pbDisplay(_INTL("{1} became healthy.",battler.pbThis))
end
battle.pbHideAbilitySplash(battler)
}
)