Gen7Data/Scripts/Items/heal_item.as

namespace Pokemon{
    [ItemUse effect=heal]
    class HealItem : ItemUseScript {
        uint _amount;

        void OnInitialize(const narray<EffectParameter@>@ parameters) override {
            _amount = uint(parameters[0].AsInt());
        }

        bool IsItemUsable() override {
            return true;
        }

        bool IsPokemonUseItem() override {
            return true;
        }

        bool IsUseValidForPokemon(Pokemon@ pokemon) override {
            return pokemon.CurrentHealth < pokemon.MaxHealth;
        }

        void OnPokemonUse(Pokemon@ pkmn) override {
            pkmn.Heal(_amount);
        }
    }
}