import type { AbilityEffect } from "./abilityCatalog";
import type { RomGeneratedAbilityLike } from "./romAbilitySemantics";

// NPC spell mitigation models these five resistance fields. RuneWaker's
// Elemental Weakness component (500365) is an all-resistance −30 modifier;
// expand it so the debuff affects the same fields used by damage resolution.
const MODELED_MAGIC_RESISTANCES = ["arcane", "fire", "frost", "nature", "shadow"] as const;
const MODELED_MAGICAL_DAMAGE_SCHOOLS = ["arcane", "fire", "frost", "holy", "nature", "shadow"] as const;
const ROM_MAGE_FIRE_WARD_RADIUS = 10;

export function overrideRomMageEffects(
  row: RomGeneratedAbilityLike,
  translated: readonly AbilityEffect[],
): readonly AbilityEffect[] | null {
  if (row.classId !== "rom-mage") return null;

  // Meditative Current is a hit-triggered passive, not an always-on haste
  // aura. Its exact trigger and cooldown are applied by romMageRuntime.
  if (row.sourceSkillId === 493262) return [];
  // Light of Day is a landed-hit proc for Mage/Knight builds, not an always-on
  // damage aura. Its trigger and internal cooldown are applied at hit time.
  if (row.sourceSkillId === 493034) return [];
  if (row.sourceSkillId === 490248) {
    return translated.map((effect) => {
      if (effect.kind !== "apply-aura") return effect;
      const existingModifiers = effect.aura.modifiers ?? [];
      return {
        ...effect,
        scope: "party",
        radius: ROM_MAGE_FIRE_WARD_RADIUS,
        aura: {
          ...effect.aura,
          description: "Current CoA reduces received magical damage by 11.5%. The simulator keeps RuneWaker's +10 Fire resistance and 10-minute duration; CoA lists +230 at skill level 105, but no scaling curve is modeled.",
          modifiers: [
            ...existingModifiers,
            ...MODELED_MAGICAL_DAMAGE_SCHOOLS.map((school) => ({
              kind: "damage" as const,
              direction: "taken" as const,
              school,
              operation: "percent" as const,
              value: -0.115,
            })),
          ],
        },
      };
    });
  }
  if (row.sourceSkillId !== 490247) return null;

  return translated.map((effect) => {
    if (effect.kind !== "apply-aura") return effect;
    const modifiers = effect.aura.modifiers ?? [];
    if (!modifiers.some((modifier) => modifier.kind === "stat" && modifier.stat === "all-resistance")) {
      return effect;
    }

    return {
      ...effect,
      aura: {
        ...effect.aura,
        modifiers: modifiers.flatMap((modifier) => modifier.kind === "stat" && modifier.stat === "all-resistance"
          ? MODELED_MAGIC_RESISTANCES.map((school) => ({ ...modifier, stat: `resistance:${school}` }))
          : [modifier]),
      },
    };
  });
}