import { Entity, Player, RawMessage } from "@minecraft/server";

/**
 * Define a boss skill.
 * @beta
 */
export class BossSkill {
  constructor(
    /**
     * Id of the boss skill.
     */
    public id: string,
    /**
     * Cooldown of the boss skill.
     */
    public cooldownTime: number,
    /**
     * The radius within which entity can be effected by the skill.
     */
    public radius: number,
    /**
     * The effect of the skill.
     */
    public effect: SkillEffect,
    /**
     * Message when the skill unleash.
     */
    public message?: string | RawMessage
  ) {}
  /**
   * Unleash the skill to an entity.
   * @param entity
   * @param boss
   */
  unleash(entity: Entity, boss?: Entity) {
    const EFFECT = this.effect;
    if (entity instanceof Player) {
      if (this.message) entity.sendMessage(this.message);
      if (EFFECT.exp) entity.addExperience(EFFECT.exp);
      if (EFFECT.level) entity.addLevels(EFFECT.level);
    }
    if (EFFECT.damage) entity.applyDamage(EFFECT.damage);
    if (EFFECT.event) {
      EFFECT.event(entity, boss);
    }
  }
  /**
   * Unleash the skill to entities.
   * @param entity
   */
  /**
   * Unleash the skill to entities.
   * @param entity
   */
  unleashArray(entiies: Entity[], boss?: Entity) {
    for (const [index, entity] of entiies.entries()) {
      if (index === 0) {
        this.unleash(entity, boss);
      } else {
        this.unleash(entity);
      }
    }
  }
}

/**
 * Unleash effect of boss skill.
 */
export interface SkillEffect {
  /**
   * The trigger effect when skill unleash.
   */
  event?: (entity: Entity, boss?: Entity) => void;
  /**
   * Add exp when skill unleash.
   */
  exp?: number;
  /**
   * Add level when skill unleash.
   */
  level?: number;
  /**
   * Apply damage when skill unleash.
   */
  damage?: number;
}