EerieVillage/Assets/Scripts/Skills/Effectors/LaserSpawner.cs

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

namespace EerieVillage.Skills.Effectors
{
    /// <summary>
    /// 레이저 Effector — FX_Dragonfire 레이저.
    /// PD 지시 (2026-05-13):
    ///   - 3초마다 발사 (BaseCooldown 3)
    ///   - 캐릭터 위치에서 정면 방향 발사
    ///   - 40프레임 이후부터 이펙트 소멸 시점까지 0.5초 간격 5 데미지
    ///   - 경로 상 긴 범위 내 적 (HitboxSize.x=길이·HitboxSize.y=폭)
    /// </summary>
    public class LaserSpawner : IEffector
    {
        public void Trigger(ActiveSkillRuntime runtime, PlayerSkillInventory inventory)
        {
            var data = runtime.ActiveData;
            Vector2 playerPos = inventory.transform.position;
            Vector2 facing = Vector2.right;
            var pc = inventory.GetComponent<PlayerController>();
            if (pc != null) facing = pc.Facing;

            // 이펙트 spawn — 캐릭터 위치·방향 정합 rotation
            GameObject fx = null;
            if (data.OnHitFxPrefab != null)
            {
                float angle = Mathf.Atan2(facing.y, facing.x) * Mathf.Rad2Deg;
                fx = Object.Instantiate(data.OnHitFxPrefab, (Vector3)playerPos, Quaternion.Euler(0f, 0f, angle));
                fx.transform.SetParent(inventory.transform, true);  // 캐릭터 이동 시 함께 이동
            }

            float fxLifetime = GetFxLifetime(fx);
            int damage = Mathf.Max(data.BaseDamage, 1);
            float length = Mathf.Max(data.HitboxSize.x, 1f);  // 레이저 길이
            float width  = Mathf.Max(data.HitboxSize.y, 0.5f);

            inventory.StartCoroutine(LaserTickDamage(inventory, fx, fxLifetime, damage, length, width, data.DotInterval));
        }

        static IEnumerator LaserTickDamage(PlayerSkillInventory inventory, GameObject fx, float fxLifetime,
                                           int damage, float length, float width, float interval)
        {
            // 40 frame 대기 (이펙트 강타 시점)
            for (int i = 0; i < 40; i++) yield return null;

            // 이펙트 종료 시점까지 interval 간격 데미지
            float elapsed = 40f / 60f;  // 대략 0.667s (60fps 기준)
            float tickInterval = Mathf.Max(interval, 0.1f);
            while (elapsed < fxLifetime && fx != null)
            {
                ApplyLaserDamage(inventory, damage, length, width);
                yield return new WaitForSeconds(tickInterval);
                elapsed += tickInterval;
            }
        }

        static void ApplyLaserDamage(PlayerSkillInventory inventory, int damage, float length, float width)
        {
            if (inventory == null) return;
            Vector2 origin = inventory.transform.position;
            Vector2 facing = Vector2.right;
            var pc = inventory.GetComponent<PlayerController>();
            if (pc != null) facing = pc.Facing;

            var enemies = Object.FindObjectsByType<EnemyController>(FindObjectsSortMode.None);
            foreach (var e in enemies)
            {
                if (e == null) continue;
                Vector2 toEnemy = (Vector2)e.transform.position - origin;
                float along = Vector2.Dot(toEnemy, facing.normalized);  // 레이저 진행 거리
                if (along < 0f || along > length) continue;  // 뒤 / 너무 멀리
                Vector2 perpVec = toEnemy - facing.normalized * along;
                if (perpVec.magnitude > width * 0.5f) continue;  // 폭 밖

                var h = e.GetComponent<Health>();
                if (h == null || !h.IsAlive) continue;
                h.DecrementBypassInvuln(damage);  // 0.5s 간격 누적 — invuln 미갱신
                if (!h.IsAlive)
                {
                    Schedule<EnemyDeath>().enemy = e;
                }
            }
        }

        static float GetFxLifetime(GameObject fxGo)
        {
            if (fxGo == null) return 2f;
            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;
            }
            return max > 0.1f ? max : 2f;
        }
    }
}