using System.Collections.Generic;
using UnityEngine;
using Platformer.Mechanics;
using Platformer.Gameplay;
using static Platformer.Core.Simulation;

namespace EerieVillage.Skills.Effectors
{
    /// <summary>
    /// A05 학익진 — 플레이어 주변 범위 즉시 피해 + FX_SLASH 이펙트.
    /// PD 지시 (2026-05-13):
    ///   - 1.5초 간격 (BaseCooldown 1.5)
    ///   - 플레이어 주변 영역 (HitboxSize 반경) 내 적에게 피해
    ///   - 공격력 10 (BaseDamage)
    ///   - FX_SLASH 이펙트 재생 (data.OnHitFxPrefab)
    /// </summary>
    public class MeleeAreaSpawner : IEffector
    {
        public void Trigger(ActiveSkillRuntime runtime, PlayerSkillInventory inventory)
        {
            var data = runtime.ActiveData;
            Vector2 playerPos = inventory.transform.position;

            // 이펙트 spawn — 플레이어 위치
            if (data.OnHitFxPrefab != null)
            {
                var fx = Object.Instantiate(data.OnHitFxPrefab, playerPos, Quaternion.identity);
                AutoDestroyFx(fx);
            }

            // 범위 내 적 일괄 피해
            int damage = Mathf.Max(runtime.CalculateEffectiveDamage(), data.BaseDamage);
            float radius = Mathf.Max(data.HitboxSize.x, data.HitboxSize.y);
            var enemies = Object.FindObjectsByType<EnemyController>(FindObjectsSortMode.None);
            foreach (var e in enemies)
            {
                if (e == null) continue;
                if (Vector2.Distance(e.transform.position, playerPos) > radius) continue;
                var h = e.GetComponent<Health>();
                if (h == null || !h.IsAlive) continue;
                h.Decrement(damage);
                if (!h.IsAlive)
                {
                    Schedule<EnemyDeath>().enemy = e;
                }
            }
        }

        static void AutoDestroyFx(GameObject fxGo)
        {
            if (fxGo == null) return;
            var psList = fxGo.GetComponentsInChildren<ParticleSystem>(true);
            float max = 0f;
            foreach (var ps in psList)
            {
                var main = ps.main;
                float t = main.duration + main.startLifetime.constantMax;
                if (t > max) max = t;
            }
            Object.Destroy(fxGo, Mathf.Max(max, 1f) + 0.2f);
        }
    }
}