feat(ai): Add fixed steal life simulator

src/main/java/fr/quatrevieux/araknemu/game/GameModule.java

@@ -150,6 +150,7 @@
 import fr.quatrevieux.araknemu.game.fight.ai.simulation.effect.DamageSimulator;
 import fr.quatrevieux.araknemu.game.fight.ai.simulation.effect.FixedCasterDamage;
 import fr.quatrevieux.araknemu.game.fight.ai.simulation.effect.FixedDamageSimulator;
+import fr.quatrevieux.araknemu.game.fight.ai.simulation.effect.FixedStealLifeSimulator;
 import fr.quatrevieux.araknemu.game.fight.ai.simulation.effect.GivePercentLifeSimulator;
 import fr.quatrevieux.araknemu.game.fight.ai.simulation.effect.HealOrMultiplyDamageSimulator;
 import fr.quatrevieux.araknemu.game.fight.ai.simulation.effect.HealSimulator;
@@ -925,6 +926,7 @@ private void configureServices(ContainerConfigurator configurator) {
             simulator.register(99,  new DamageSimulator(Element.FIRE));
             simulator.register(100, new DamageSimulator(Element.NEUTRAL));
 
+            simulator.register(82, new FixedStealLifeSimulator());
             simulator.register(131, new DamageOnActionPointUseSimulator());
             simulator.register(144, new FixedDamageSimulator());
 

src/main/java/fr/quatrevieux/araknemu/game/fight/ai/simulation/effect/FixedStealLifeSimulator.java

@@ -0,0 +1,80 @@
+/*
+ * 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) 2017-2023 Vincent Quatrevieux
+ */
+
+package fr.quatrevieux.araknemu.game.fight.ai.simulation.effect;
+
+import fr.arakne.utils.value.Interval;
+import fr.quatrevieux.araknemu.game.fight.ai.AI;
+import fr.quatrevieux.araknemu.game.fight.ai.simulation.CastSimulation;
+import fr.quatrevieux.araknemu.game.fight.ai.simulation.SpellScore;
+import fr.quatrevieux.araknemu.game.fight.ai.simulation.effect.util.Formula;
+import fr.quatrevieux.araknemu.game.fight.castable.CastScope;
+import fr.quatrevieux.araknemu.game.fight.fighter.FighterData;
+import fr.quatrevieux.araknemu.game.fight.map.BattlefieldCell;
+import fr.quatrevieux.araknemu.game.spell.effect.SpellEffect;
+import fr.quatrevieux.araknemu.game.world.creature.characteristics.Characteristics;
+import fr.quatrevieux.araknemu.util.Asserter;
+import org.checkerframework.checker.index.qual.GTENegativeOne;
+
+import java.util.Collection;
+
+/**
+ * Simulator for fixed steal life effect
+ *
+ * @see fr.quatrevieux.araknemu.game.fight.castable.effect.handler.damage.FixedStealLifeHandler The simulated effect
+ */
+public final class FixedStealLifeSimulator implements EffectSimulator {
+    @Override
+    public void simulate(CastSimulation simulation, AI ai, CastScope.EffectScope<? extends FighterData, ? extends BattlefieldCell> effect) {
+        final SpellEffect spellEffect = effect.effect();
+        final Interval damage = damage(spellEffect);
+        final FighterData caster = simulation.caster();
+
+        if (spellEffect.duration() == 0) {
+            simulateDamage(simulation, caster, damage, effect.targets());
+        } else {
+            simulatePoison(simulation, caster, damage, spellEffect.duration(), effect.targets());
+        }
+    }
+
+    @Override
+    public void score(SpellScore score, SpellEffect effect, Characteristics characteristics) {
+        score.addDamage(Asserter.castNonNegative((int) damage(effect).average()));
+    }
+
+    private Interval damage(SpellEffect effect) {
+        return Interval.of(effect.min(), Math.max(effect.max(), effect.min()));
+    }
+
+    private void simulatePoison(CastSimulation simulation, FighterData caster, Interval damage, @GTENegativeOne int duration, Collection<? extends FighterData> targets) {
+        final int capedDuration = Formula.capedDuration(duration);
+
+        for (FighterData target : targets) {
+            simulation.addPoison(damage, capedDuration, target);
+            simulation.addHealBuff(damage, capedDuration, caster);
+        }
+    }
+
+    private void simulateDamage(CastSimulation simulation, FighterData caster, Interval damage, Collection<? extends FighterData> targets) {
+        for (FighterData target : targets) {
+            simulation.addDamage(damage, target);
+            simulation.addHeal(damage, caster);
+        }
+    }
+}

src/test/java/fr/quatrevieux/araknemu/game/fight/ai/simulation/effect/FixedStealLifeSimulatorTest.java

@@ -0,0 +1,199 @@
+/*
+ * 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) 2017-2023 Vincent Quatrevieux
+ */
+
+package fr.quatrevieux.araknemu.game.fight.ai.simulation.effect;
+
+import fr.quatrevieux.araknemu.data.value.EffectArea;
+import fr.quatrevieux.araknemu.game.fight.Fight;
+import fr.quatrevieux.araknemu.game.fight.FightBaseCase;
+import fr.quatrevieux.araknemu.game.fight.ai.FighterAI;
+import fr.quatrevieux.araknemu.game.fight.ai.action.logic.NullGenerator;
+import fr.quatrevieux.araknemu.game.fight.ai.simulation.CastSimulation;
+import fr.quatrevieux.araknemu.game.fight.ai.simulation.SpellScore;
+import fr.quatrevieux.araknemu.game.fight.castable.CastScope;
+import fr.quatrevieux.araknemu.game.fight.fighter.Fighter;
+import fr.quatrevieux.araknemu.game.fight.fighter.player.PlayerFighter;
+import fr.quatrevieux.araknemu.game.fight.map.FightCell;
+import fr.quatrevieux.araknemu.game.spell.Spell;
+import fr.quatrevieux.araknemu.game.spell.SpellConstraints;
+import fr.quatrevieux.araknemu.game.spell.effect.SpellEffect;
+import fr.quatrevieux.araknemu.game.spell.effect.area.CellArea;
+import fr.quatrevieux.araknemu.game.spell.effect.area.CircleArea;
+import fr.quatrevieux.araknemu.game.spell.effect.target.SpellEffectTarget;
+import fr.quatrevieux.araknemu.game.world.creature.characteristics.DefaultCharacteristics;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mockito;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class FixedStealLifeSimulatorTest extends FightBaseCase {
+    private Fight fight;
+    private PlayerFighter fighter;
+    private Fighter target;
+    private FighterAI ai;
+    private FixedStealLifeSimulator simulator;
+
+    @Override
+    @BeforeEach
+    public void setUp() throws Exception {
+        super.setUp();
+
+        fight = createFight();
+        fighter = player.fighter();
+        target = other.fighter();
+
+        target.init();
+        fighter.init();
+
+        target.life().alterMax(target, 1000);
+        fighter.life().alter(fighter, -50);
+
+        ai = new FighterAI(fighter, fight, new NullGenerator());
+        simulator = new FixedStealLifeSimulator();
+    }
+
+    @Test
+    void simulateSimple() {
+        assertEquals(-10, simulate().enemiesLife());
+        assertEquals(10, simulate().selfLife());
+    }
+
+    @Test
+    void simulateBuff() {
+        SpellEffect effect = Mockito.mock(SpellEffect.class);
+        Spell spell = Mockito.mock(Spell.class);
+        SpellConstraints constraints = Mockito.mock(SpellConstraints.class);
+
+        Mockito.when(effect.min()).thenReturn(10);
+        Mockito.when(effect.area()).thenReturn(new CellArea());
+        Mockito.when(effect.target()).thenReturn(SpellEffectTarget.DEFAULT);
+        Mockito.when(effect.duration()).thenReturn(2);
+        Mockito.when(spell.constraints()).thenReturn(constraints);
+        Mockito.when(constraints.freeCell()).thenReturn(false);
+
+        CastSimulation simulation = new CastSimulation(spell, fighter, target.cell());
+
+        CastScope<Fighter, FightCell> scope = makeCastScope(fighter, spell, effect, target.cell());
+        simulator.simulate(simulation, ai, scope.effects().get(0));
+
+        assertEquals(-15.0, simulation.enemiesLife());
+        assertEquals(10.0, simulation.selfLife());
+        assertEquals(7.5, simulation.selfBoost());
+
+        Mockito.when(effect.duration()).thenReturn(5);
+        simulation = new CastSimulation(spell, fighter, target.cell());
+        scope = makeCastScope(fighter, spell, effect, target.cell());
+        simulator.simulate(simulation, ai, scope.effects().get(0));
+        assertEquals(-37.5, simulation.enemiesLife());
+        assertEquals(10, simulation.selfLife());
+        assertEquals(30, simulation.selfBoost());
+
+        Mockito.when(effect.duration()).thenReturn(20);
+        simulation = new CastSimulation(spell, fighter, target.cell());
+        scope = makeCastScope(fighter, spell, effect, target.cell());
+        simulator.simulate(simulation, ai, scope.effects().get(0));
+        assertEquals(-75.0, simulation.enemiesLife());
+        assertEquals(10.0, simulation.selfLife());
+        assertEquals(67.5, simulation.selfBoost());
+    }
+
+    @Test
+    void simulateInfiniteBuff() {
+        SpellEffect effect = Mockito.mock(SpellEffect.class);
+        Spell spell = Mockito.mock(Spell.class);
+        SpellConstraints constraints = Mockito.mock(SpellConstraints.class);
+
+        Mockito.when(effect.min()).thenReturn(10);
+        Mockito.when(effect.area()).thenReturn(new CellArea());
+        Mockito.when(effect.target()).thenReturn(SpellEffectTarget.DEFAULT);
+        Mockito.when(effect.duration()).thenReturn(-1);
+        Mockito.when(spell.constraints()).thenReturn(constraints);
+        Mockito.when(constraints.freeCell()).thenReturn(false);
+
+        CastSimulation simulation = new CastSimulation(spell, fighter, target.cell());
+
+        CastScope<Fighter, FightCell> scope = makeCastScope(fighter, spell, effect, target.cell());
+        simulator.simulate(simulation, ai, scope.effects().get(0));
+
+        assertEquals(-75.0, simulation.enemiesLife());
+        assertEquals(10.0, simulation.selfLife());
+        assertEquals(67.5, simulation.selfBoost());
+    }
+
+    @Test
+    void simulateArea() {
+        SpellEffect effect = Mockito.mock(SpellEffect.class);
+        Spell spell = Mockito.mock(Spell.class);
+        SpellConstraints constraints = Mockito.mock(SpellConstraints.class);
+
+        Mockito.when(effect.min()).thenReturn(10);
+        Mockito.when(effect.area()).thenReturn(new CircleArea(new EffectArea(EffectArea.Type.CIRCLE, 10)));
+        Mockito.when(effect.target()).thenReturn(SpellEffectTarget.DEFAULT);
+        Mockito.when(spell.constraints()).thenReturn(constraints);
+        Mockito.when(constraints.freeCell()).thenReturn(false);
+
+        CastSimulation simulation = new CastSimulation(spell, fighter, other.fighter().cell());
+
+        CastScope<Fighter, FightCell> scope = makeCastScope(fighter, spell, effect, other.fighter().cell());
+        simulator.simulate(simulation, ai, scope.effects().get(0));
+
+        assertEquals(10, simulation.selfLife());
+        assertEquals(-10, simulation.enemiesLife());
+    }
+
+    @Test
+    void score() {
+        SpellEffect effect = Mockito.mock(SpellEffect.class);
+        Spell spell = Mockito.mock(Spell.class);
+        SpellConstraints constraints = Mockito.mock(SpellConstraints.class);
+
+        Mockito.when(effect.min()).thenReturn(10);
+        Mockito.when(effect.max()).thenReturn(15);
+        Mockito.when(effect.area()).thenReturn(new CellArea());
+        Mockito.when(effect.target()).thenReturn(SpellEffectTarget.DEFAULT);
+        Mockito.when(spell.constraints()).thenReturn(constraints);
+        Mockito.when(constraints.freeCell()).thenReturn(false);
+
+        SpellScore score = new SpellScore();
+        simulator.score(score, effect, new DefaultCharacteristics());
+
+        assertEquals(12, score.score());
+        assertEquals(12, score.damage());
+    }
+
+    private CastSimulation simulate() {
+        SpellEffect effect = Mockito.mock(SpellEffect.class);
+        Spell spell = Mockito.mock(Spell.class);
+        SpellConstraints constraints = Mockito.mock(SpellConstraints.class);
+
+        Mockito.when(effect.min()).thenReturn(10);
+        Mockito.when(effect.area()).thenReturn(new CellArea());
+        Mockito.when(effect.target()).thenReturn(SpellEffectTarget.DEFAULT);
+        Mockito.when(spell.constraints()).thenReturn(constraints);
+        Mockito.when(constraints.freeCell()).thenReturn(false);
+
+        CastSimulation simulation = new CastSimulation(spell, fighter, target.cell());
+
+        CastScope<Fighter, FightCell> scope = makeCastScope(fighter, spell, effect, target.cell());
+        simulator.simulate(simulation, ai, scope.effects().get(0));
+
+        return simulation;
+    }
+}