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package gtPlusPlus.xmod.gregtech.api.energy;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.item.ItemStack;
/**
* This interface specifies a manager to handle the various tasks for electric items.
*
* The default implementation does the following:
* - store and retrieve the charge
* - handle charging, taking amount, tier, transfer limit, canProvideEnergy and simulate into account
* - replace item IDs if appropriate (getChargedItemId() and getEmptyItemId())
* - update and manage the damage value for the visual charge indicator
*
* @note If you're implementing your own variant (ISpecialElectricItem), you can delegate to the
* default implementations through ElectricItem.rawManager. The default implementation is designed
* to minimize its dependency on its own constraints/structure and delegates most work back to the
* more atomic features in the gateway manager.
*/
public interface IC2ElectricItemManager {
/**
* Charge an item with a specified amount of energy.
*
* @param itemStack electric item's stack
* @param amount amount of energy to charge in EU
* @param tier tier of the charging device, has to be at least as high as the item to charge
* @param ignoreTransferLimit ignore the transfer limit specified by getTransferLimit()
* @param simulate don't actually change the item, just determine the return value
* @return Energy transferred into the electric item
*/
double charge(ItemStack stack, double amount, int tier, boolean ignoreTransferLimit, boolean simulate);
/**
* Discharge an item by a specified amount of energy
*
* @param itemStack electric item's stack
* @param amount amount of energy to discharge in EU
* @param tier tier of the discharging device, has to be at least as high as the item to discharge
* @param ignoreTransferLimit ignore the transfer limit specified by getTransferLimit()
* @param externally use the supplied item externally, i.e. to power something else as if it was a battery
* @param simulate don't actually discharge the item, just determine the return value
* @return Energy retrieved from the electric item
*/
double discharge(ItemStack stack, double amount, int tier, boolean ignoreTransferLimit, boolean externally, boolean simulate);
/**
* Determine the charge level for the specified item.
*
* @param itemStack ItemStack containing the electric item
* @return charge level in EU
*/
double getCharge(ItemStack stack);
/**
* Determine if the specified electric item has at least a specific amount of EU.
* This is supposed to be used in the item code during operation, for example if you want to implement your own electric item.
* BatPacks are not taken into account.
*
* @param itemStack electric item's stack
* @param amount minimum amount of energy required
* @return true if there's enough energy
*/
boolean canUse(ItemStack stack, double amount);
/**
* Try to retrieve a specific amount of energy from an Item, and if applicable, a BatPack.
* This is supposed to be used in the item code during operation, for example if you want to implement your own electric item.
*
* @param itemStack electric item's stack
* @param amount amount of energy to discharge in EU
* @param entity entity holding the item
* @return true if the operation succeeded
*/
boolean use(ItemStack stack, double amount, EntityLivingBase entity);
/**
* Charge an item from the BatPack a player is wearing.
* This is supposed to be used in the item code during operation, for example if you want to implement your own electric item.
* use() already contains this functionality.
*
* @param itemStack electric item's stack
* @param entity entity holding the item
*/
void chargeFromArmor(ItemStack stack, EntityLivingBase entity);
/**
* Get the tool tip to display for electric items.
*
* @param itemStack ItemStack to determine the tooltip for
* @return tool tip string or null for none
*/
String getToolTip(ItemStack stack);
// TODO: add tier getter
}
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