using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Arrow : MonoBehaviour
{
    private float MAX_TIME = 0.8f;
    [SerializeField] float mSpeed = 50;
    [SerializeField] GameObject mPfbExplode;
    [SerializeField] AudioClip mShootSound;
    [SerializeField] AudioClip mHitSound;

    private GroupType mMasterGroup;
    private int mAtkVal;

    private Transform mTrans;
    //for curve
    private float mTimer = 0f;
    private Vector3 mInitPos = Vector3.zero;
    private Vector3 mTargetPos = Vector3.zero;
    private Vector3 mDirection = Vector3.zero;

    private Vector3 mHand1 = Vector3.zero;
    private Vector3 mHand2 = Vector3.zero;

    private WarUnit mTarget = null;
    private bool mIsActive = false;

    private void Awake()
    {
        mTrans = transform;
    }

    private void Update()
    {
        if (!mIsActive)
            return;

        mTrans.position += Time.deltaTime * mSpeed * mDirection;
        mTimer -= Time.deltaTime;
        if (mTimer <= 0)
        {
            Hit();
        }

        //mTimer += Time.deltaTime;

        //if (mTimer <= MAX_TIME)
        //{
        //    mTrans.position = CurvePos();
        //}
        //else if (mTimer > MAX_TIME * 2f)
        //{
        //    Destroy(gameObject);
        //}
    }

    public void Init(GroupType pGroup, int pAtkVal, Vector3 pInitPos, Vector3 pTargetPos, WarUnit pTarget)
    {
        mMasterGroup = pGroup;
        mAtkVal = pAtkVal;

        mInitPos = pInitPos;
        mTargetPos = pTargetPos;
        mTargetPos.y = pTarget.transform.position.y + 1;

        mTrans.position = mInitPos;
        
        Vector3 v = mTargetPos - mInitPos;
        //mHand1 = mInitPos + v * 0.4f + Vector3.up * v.magnitude / 3f;
        //mHand2 = mInitPos + v * 0.6f + Vector3.up * v.magnitude / 3f;
        //mTimer = 0;

        mDirection = v.normalized;
        mTrans.LookAt(mTargetPos);
        mTimer = v.magnitude / mSpeed;

        mTarget = pTarget;

        AudioManager.Instance.PlaySound(mShootSound, 0.6f);

        mIsActive = true;
    }

    private Vector3 CurvePos()
    {
        float t = mTimer / MAX_TIME;
        Vector3 tPos = Vector3.zero;
        tPos = (1 - t) * (1 - t) * (1 - t) * mInitPos;
        tPos += 3 * (1 - t) * (1 - t) * t * mHand1;
        tPos += 3 * (1 - t) * t * t * mHand2;
        tPos += t * t * t * mTargetPos;
        return tPos;
    }

    private void Hit()
    {
        if (mPfbExplode != null)
        {
            Instantiate(mPfbExplode, mTargetPos, Quaternion.identity);
        }
        AudioManager.Instance.PlaySound(mHitSound, 0.6f);

        mIsActive = false;
        mTarget.Hurt(mAtkVal);
        Destroy(gameObject);
    }

    //private void OnTriggerEnter(Collider pOther)
    //{
    //    WarUnit tUnit = pOther.GetComponent<WarUnit>();

    //    if (tUnit != null && mMasterGroup != tUnit.Group)
    //    {
    //        tUnit.Hurt(mAtkVal);
    //        Destroy(gameObject);
    //    }
    //}
}