Arakne / Araknemu

 * This file is part of Araknemu.

 *

 * Araknemu is free software: you can redistribute it and/or modify

 * it under the terms of the GNU Lesser General Public License as published by

 * the Free Software Foundation, either version 3 of the License, or

 * (at your option) any later version.

 *

 * Araknemu is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public License

 * along with Araknemu.  If not, see <https://www.gnu.org/licenses/>.

 *

 * Copyright (c) 2017-2019 Vincent Quatrevieux

 */

package fr.quatrevieux.araknemu.game.fight.ending.reward.drop.pvm.provider;

import fr.quatrevieux.araknemu.data.constant.Characteristic;

import fr.quatrevieux.araknemu.game.fight.ending.EndFightResults;

import fr.quatrevieux.araknemu.game.fight.ending.reward.drop.DropReward;

import fr.quatrevieux.araknemu.game.fight.fighter.Fighter;

import fr.quatrevieux.araknemu.game.fight.fighter.monster.MonsterFighter;

import fr.quatrevieux.araknemu.game.fight.fighter.operation.FighterOperation;

import org.checkerframework.checker.index.qual.NonNegative;

/**

 * Base formula for compute the Pvm experience

 */

public final class PvmXpProvider implements DropRewardProvider {

    private final double rate;

    public PvmXpProvider(double rate) {

        this.rate = rate;

    }

    @Override

    public DropRewardProvider.Scope initialize(EndFightResults results) {

        return new Scope(

            totalXp(results),

            teamsLevelsRate(results),

            teamLevelDeviationBonus(results),

            results.winners().stream().mapToInt(Fighter::level).sum()

        );

    }

    private long totalXp(EndFightResults results) {

        return (long) (results.applyToLoosers(new ExtractXp()).get() * rate);

    }

    private double teamLevelDeviationBonus(EndFightResults results) {

        final int level = results.winners().stream().mapToInt(Fighter::level).max().orElse(0) / 3;

        int number = 0;

        for (Fighter winner : results.winners()) {

            if (winner.level() > level) {

                ++number;

            }

        }

        switch (number) {

            case 1:

                return 1.0;

            case 2:

                return 1.1;

            case 3:

                return 1.3;

            case 4:

                return 2.2;

            case 5:

                return 2.5;

            case 6:

                return 2.8;

            case 7:

                return 3.1;

            default:

                return 3.5;

        }

    }

    private double teamsLevelsRate(EndFightResults results) {

        final double winnersLevel = results.winners().stream().mapToInt(Fighter::level).sum();

        final double loosersLevel = results.loosers().stream().mapToInt(Fighter::level).sum();

        return Math.min(

            1.3,

            1 + loosersLevel / winnersLevel

        );

    }

        private final long totalXp;

        private final double teamsLevelsRate;

        private final double teamLevelDeviationBonus;

        private final double winnersLevel;

        public Scope(long totalXp, double teamsLevelsRate, double teamLevelDeviationBonus, double winnersLevel) {

            this.totalXp = totalXp;

            this.teamsLevelsRate = teamsLevelsRate;

            this.teamLevelDeviationBonus = teamLevelDeviationBonus;

            this.winnersLevel = winnersLevel;

        }

        @Override

        public void provide(DropReward reward) {

            final long winXp = (long) (

                totalXp

                    * teamsLevelsRate

                    * teamLevelDeviationBonus

                    * (1 + ((double) reward.fighter().level() / winnersLevel))

                    * (1 + (double) reward.fighter().characteristics().get(Characteristic.WISDOM) / 100)

            );

            reward.setXp(Math.max(winXp, 0));

        }

    }

    private static class ExtractXp implements FighterOperation {

        private @NonNegative long xp;

        @Override

        public void onMonster(MonsterFighter fighter) {

            xp += fighter.reward().experience();

        }

        public @NonNegative long get() {

            return xp;

        }

    }

}