healer-man/src/game/enemyCasting.test.ts

import { beforeEach, describe, expect, it } from "vitest";
import { clearMobRuntimeRegistry, setMobPosition } from "./mobRuntimeRegistry";
import { useCombatStore } from "./combatStore";
import {
  normalizeEnemyAttack,
  type EnemyAttackDefinition,
  type EnemyDamageSchool,
} from "./enemyAttacks";

function spell(
  id: string,
  school: EnemyDamageSchool,
  castTimeMs = 1_000,
): EnemyAttackDefinition {
  return {
    id,
    name: id,
    spellId: id === "shadow-bolt" ? 686 : undefined,
    delivery: "projectile",
    target: "primary",
    school,
    animation: "cast",
    castTimeMs,
    range: 30,
    cooldownMs: 10_000,
    initialCooldownMs: [0, 0],
    repeatCooldownMs: [10_000, 10_000],
    damageMultiplier: 1,
    effect: { kind: "damage", multiplier: 1 },
  };
}

function registerCaster(attacks: readonly EnemyAttackDefinition[], id = "caster"): void {
  useCombatStore.getState().registerMob(id, {
    name: id,
    maxHealth: 1_000,
    xpReward: 0,
    attacks,
  });
  setMobPosition(id, [2, 0, 0]);
  useCombatStore.getState().selectMob(id);
  useCombatStore.getState().damageMob(id, 1, 1_000);
}

describe("enemy casting and interrupts", () => {
  beforeEach(() => {
    clearMobRuntimeRegistry();
    useCombatStore.getState().initializeCharacter({ classId: "priest", level: 20 });
    useCombatStore.getState().setPlayerPosition([0, 0, 0]);
  });

  it("infers cast time only for authored cast animations without an explicit value", () => {
    const authoredCast = spell("authored-cast", "fire");
    const { castTimeMs: _omitted, ...withoutCastTime } = authoredCast;
    expect(normalizeEnemyAttack(withoutCastTime).castTimeMs).toBe(1_500);
    expect(normalizeEnemyAttack({ ...withoutCastTime, castTimeMs: 0 }).castTimeMs).toBe(0);
    expect(normalizeEnemyAttack({ ...withoutCastTime, animation: "attack" }).castTimeMs).toBe(0);
  });

  it("delays an enemy spell effect until its cast completes", () => {
    registerCaster([spell("shadow-bolt", "shadow")]);
    const startingHealth = useCombatStore.getState().health;

    expect(useCombatStore.getState().advanceMobCombat(1_000)).toBe(0);
    expect(useCombatStore.getState().mobs.caster.activeCast).toMatchObject({
      attackId: "shadow-bolt",
      name: "shadow-bolt",
      spellId: 686,
      school: "shadow",
      interruptible: true,
      targetActorId: "__player__",
      startedAt: 1_000,
      completesAt: 2_000,
    });
    expect(useCombatStore.getState().health).toBe(startingHealth);

    expect(useCombatStore.getState().advanceMobCombat(1_999)).toBe(0);
    expect(useCombatStore.getState().health).toBe(startingHealth);
    expect(useCombatStore.getState().advanceMobCombat(2_000)).toBeGreaterThan(0);
    expect(useCombatStore.getState().health).toBeLessThan(startingHealth);
    expect(useCombatStore.getState().mobs.caster.activeCast).toBeNull();
  });

  it("interrupts the active cast and locks only that spell school", () => {
    useCombatStore.getState().initializeCharacter({ classId: "rogue", level: 20 });
    registerCaster([
      spell("shadow-bolt", "shadow", 2_000),
      spell("fireball", "fire", 1_000),
    ]);

    useCombatStore.getState().advanceMobCombat(1_000);
    expect(useCombatStore.getState().mobs.caster.activeCast?.school).toBe("shadow");
    const kick = useCombatStore.getState().castAbility("rogue-kick", [0, 0, 0], 1_100);
    expect(kick).toMatchObject({ ok: true });
    expect(useCombatStore.getState().mobs.caster).toMatchObject({
      activeCast: null,
      schoolLockedUntil: { shadow: 6_100 },
    });

    expect(useCombatStore.getState().advanceMobCombat(1_101)).toBe(0);
    expect(useCombatStore.getState().mobs.caster.activeCast?.school).toBe("fire");
    useCombatStore.getState().advanceMobCombat(2_101);
    expect(useCombatStore.getState().mobs.caster.activeCast).toBeNull();

    useCombatStore.getState().advanceMobCombat(6_099);
    expect(useCombatStore.getState().mobs.caster.activeCast).toBeNull();
    useCombatStore.getState().advanceMobCombat(6_100);
    expect(useCombatStore.getState().mobs.caster.activeCast?.school).toBe("shadow");
    expect(useCombatStore.getState().mobs.caster.schoolLockedUntil).toEqual({});
  });

  it("cancels casts immediately when crowd control lands", () => {
    useCombatStore.getState().initializeCharacter({ classId: "rogue", level: 4 });
    registerCaster([spell("shadow-bolt", "shadow", 2_000)]);
    useCombatStore.getState().advanceMobCombat(1_000);

    expect(useCombatStore.getState().castAbility("rogue-gouge", [0, 0, 0], 1_100).ok).toBe(true);
    expect(useCombatStore.getState().mobs.caster.activeCast).toBeNull();
    expect(useCombatStore.getState().mobs.caster.statuses).toContainEqual({
      kind: "stun",
      sourceAbilityId: "rogue-gouge",
      endsAt: 5_100,
    });
  });

  it("clears pending enemy casts on death and encounter reset", () => {
    registerCaster([spell("shadow-bolt", "shadow", 2_000)], "doomed");
    useCombatStore.getState().advanceMobCombat(1_000);
    expect(useCombatStore.getState().mobs.doomed.activeCast).not.toBeNull();
    useCombatStore.getState().damageMob("doomed", 10_000, 1_100);
    expect(useCombatStore.getState().mobs.doomed).toMatchObject({ dead: true, activeCast: null });

    registerCaster([spell("fireball", "fire", 2_000)], "reset-caster");
    useCombatStore.getState().advanceMobCombat(2_000);
    expect(useCombatStore.getState().mobs["reset-caster"].activeCast).not.toBeNull();
    useCombatStore.getState().resetEncounter();
    expect(useCombatStore.getState().mobs["reset-caster"]).toMatchObject({
      activeCast: null,
      schoolLockedUntil: {},
      abilityReadyAt: {},
      engaged: false,
    });
  });
});