using CodeStage.AntiCheat.ObscuredTypes;
using UnityEngine;

public class Projectile : MonoBehaviour
{
    public float m_Speed = 12f;
    public float radius = 0.1f;

    Vector2 dir;
    Vector2 prevPos;
    ObscuredInt m_bounceCount;

    ProjectileData m_ProjectileData;

    #region 투사체 매니저
    ProjectileMgr owner;
    string prefabKey;

    public void SetOwner(ProjectileMgr mgr, string key)
    {
        owner = mgr;
        prefabKey = key;
    }

    public string GetPoolKey() { return prefabKey; }
    void Kill()
    {
        owner.Return(this);
        // 이펙트 표시 필요
    }
    public ProjectileTableData Get_ProjectileTData() { return m_ProjectileData.m_Data; }
    #endregion

    public void Set(ProjectileData pd)
    {
        m_ProjectileData = pd;

        transform.SetPositionAndRotation(m_ProjectileData.tf_Start.position, m_ProjectileData.tf_Start.rotation);
        if (!m_ProjectileData.IsPC)
            transform.eulerAngles = new Vector3(0f, 0f, 180f);

        dir = transform.up.normalized;

        m_bounceCount = m_ProjectileData.m_Data.n_AttackBounceLimit;
        m_bounceCount.RandomizeCryptoKey();
    }

    void Update()
    {
        prevPos = transform.position;

        float moveDist = m_Speed * Time.deltaTime;
        transform.position += (Vector3)(dir * moveDist);
    }

    private void OnTriggerEnter2D(Collider2D collision)
    {
        if (!m_ProjectileData.IsPC && collision.tag == "Mob") return;

        Check_Hit(collision);

        if (m_bounceCount <= 0)
        {
            Kill();
            return;
        }

        Vector2 currentPos = transform.position;
        Vector2 moveVec = currentPos - prevPos;
        float distance = moveVec.magnitude;
        Vector2 moveDir = distance > 0 ? moveVec / distance : dir;

        // CircleCast로 정확한 충돌 지점(centroid)과 법선 탐색
        RaycastHit2D[] hits = Physics2D.CircleCastAll(prevPos, radius, moveDir, distance);
        RaycastHit2D hit = new RaycastHit2D();
        bool found = false;

        foreach (var h in hits)
        {
            if (h.collider == collision)
            {
                // 자기 자신(시작 위치에서 걸리는 경우) 제외 로직이 필요할 수 있으나,
                // distance > 0 체크 등으로 보완. 여기서는 가장 먼저 닿는 지점을 찾음.
                hit = h;
                found = true;
                break;
            }
        }

        Vector2 normal;
        Vector2 targetPos;

        if (found)
        {
            normal = hit.normal;
            // CircleCast의 centroid는 충돌 시의 원의 중심 위치입니다.
            targetPos = hit.centroid; 
        }
        else
        {
            // fallback: ClosestPoint
            Vector2 closestRef = collision.ClosestPoint(prevPos);
            normal = (prevPos - closestRef).normalized;
            if (normal == Vector2.zero)
            {
                normal = (prevPos - (Vector2)collision.bounds.center).normalized;
            }
            targetPos = closestRef + normal * radius;
        }

        // 반사
        dir = Vector2.Reflect(dir, normal).normalized;
        m_bounceCount--;
        m_bounceCount.RandomizeCryptoKey();

        // 회전
        float angle = Mathf.Atan2(dir.y, dir.x) * Mathf.Rad2Deg - 90f;
        transform.rotation = Quaternion.Euler(0, 0, angle);

        // 위치 보정
        transform.position = targetPos;

        
    }

    void Check_Hit(Collider2D collision)
    {
        if (m_ProjectileData.IsPC)
        {
            switch(collision.tag)
            {
                case "Mob": collision.GetComponent<MobActor>().Get_Dmg(m_ProjectileData); break;
                case "MobShield": collision.GetComponent<MobShield>().Get_Dmg(); break;
            }
        }
        else
        {
            if (collision.tag == "Wall_HP")
            {
                IngameMgr.Ins.Get_Dmg(m_ProjectileData.Dmg);
            }
        }
    }

    void Projectile_Split(bool hitEnemy)
    {
        if (hitEnemy)
        {
            for (int i = 0; i < 2; i++)
            {
                //ProjectileMgr.Ins.Get(transform.position, Quaternion.Euler(0, 0, Random.Range(-20, 20)) * dir);
            }
        }
    }
}

public class ProjectileData
{
    public ProjectileTableData m_Data;
    public Transform tf_Start;
    ObscuredBool _IsPC; public bool IsPC { get { return _IsPC; } set { _IsPC = value; _IsPC.RandomizeCryptoKey(); } }
    ObscuredInt _Lv; public int Lv { get { return _Lv; } set { _Lv = value; _Lv.RandomizeCryptoKey(); } }
    ObscuredInt _Dmg; public int Dmg { get { return _Dmg; } set { _Dmg = value; _Dmg.RandomizeCryptoKey(); } }
}