/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2013 AlgorithmX2
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package appeng.api.networking.energy;

import javax.annotation.Nonnegative;
import javax.annotation.Nonnull;

import appeng.api.config.Actionable;
import appeng.api.networking.IGridCache;
import appeng.api.networking.events.MENetworkPowerStatusChange;

/**
 * AE's Power system.
 */
public interface IEnergyGrid extends IGridCache, IEnergySource, IEnergyGridProvider {

    /**
     * @return the current calculated idle energy drain each tick, is used
     *         internally to drain power for each tick.
     */
    @Nonnegative
    double getIdlePowerUsage();

    /**
     * @return the average power drain over the past 10 ticks, includes idle usage
     *         during this time, and all use of extractPower.
     */
    @Nonnegative
    double getAvgPowerUsage();

    /**
     * @return the average energy injected into the system per tick, for the last 10
     *         ticks.
     */
    @Nonnegative
    double getAvgPowerInjection();

    /**
     * AE maintains an idle draw of power separate from active power draw, it
     * condenses this into a single operation that determines the networks "powered
     * state" if the network is considered off-line, your machines should not
     * function.
     *
     * {@link MENetworkPowerStatusChange} events are posted when this value changes
     * if you need to be notified of the change, most machines can simply test the
     * value when they operate.
     *
     * @return if the network is powered or not.
     */
    boolean isNetworkPowered();

    /**
     * AE will accept any power, and store it, to maintain sanity please don't send
     * more then 10,000 at a time.
     *
     * IMPORTANT: Network power knows no bounds, for less spamy power flow, networks
     * can store more then their allotted storage, however, it should be kept to a
     * minimum, to help with this, this method returns the networks current
     * OVERFLOW, this is not energy you can store some where else, its already
     * stored in the network, you can extract it if you want, however it it owned by
     * the network, this is different then IAEEnergyStore
     *
     * Another important note, is that if a network that had overflow is deleted,
     * its power is gone, this is one of the reasons why keeping overflow to a
     * minimum is important.
     *
     * @param amt  power to inject into the network
     * @param mode should the action be simulated or performed?
     *
     * @return the amount of power that the network has OVER the limit.
     */
    @Nonnegative
    double injectPower(@Nonnegative double amt, @Nonnull Actionable mode);

    /**
     * this is should be considered an estimate, and not relied upon for real
     * calculations.
     *
     * @return estimated available power.
     */
    @Nonnegative
    double getStoredPower();

    /**
     * this is should be considered an estimate, and not relied upon for real
     * calculations.
     *
     * @return estimated available power.
     */
    @Nonnegative
    double getMaxStoredPower();

    /**
     * Calculation will be capped at maxRequired, this improves performance by
     * limiting the number of nodes needed to calculate the demand.
     *
     * @return Amount of power required to charge the grid, in AE.
     */
    @Nonnegative
    double getEnergyDemand(@Nonnegative double maxRequired);
}
