using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using DG.Tweening;

/**瞄准器负载检测 */
public class AimLoadChecker : MonoBehaviour
{
    [SerializeField] GameObject outTip;

    // void Update()
    // {
    //     bool needActiveOutTip = false;
    //     if (ArmBow.ins && ArmBow.ins.IsCanShoot() && TargetBody.ins) {
    //         RaycastHit ray = CrossHair.ins.GetRaycastHit();
    //         if (ray.transform && ray.transform.gameObject.name == "TargetBody") {
    //             float mySpeed = Arrow.speed;
    //             if (GameAssistUI.ins) {
    //                 mySpeed *= GameAssistUI.ins.shootScaleValue;
    //             } 
    //             Vector3 destination = ray.point;
    //             Vector3 startPoint = BowCamera.ins.transform.position;
    //             float deltaX = Mathf.Sqrt(
    //                 Mathf.Pow(destination.x - startPoint.x, 2) +
    //                 Mathf.Pow(destination.z - startPoint.z,2)
    //             );
    //             float deltaY = destination.y - startPoint.y;
    //             float a = 0.5f * Physics.gravity.y * Mathf.Pow(deltaX, 2) / Mathf.Pow(mySpeed, 2);
    //             float b = deltaX;
    //             float c = a - deltaY;
    //             bool hasParabolaAngle = Mathf.Pow(b, 2) - 4 * a * c >= 0;
    //             if (hasParabolaAngle) {
    //                 float res1 = (-b + Mathf.Pow(Mathf.Pow(b, 2) - 4*a*c, 0.5f)) / (2 * a);
    //                 float res2 = (-b - Mathf.Pow(Mathf.Pow(b, 2) - 4*a*c, 0.5f)) / (2 * a);
    //                 float parabolaAngle = Mathf.Min(Mathf.Atan(res1), Mathf.Atan(res2)) / Mathf.PI * 180;

    //                 needActiveOutTip = parabolaAngle > 5;               
    //             }
    //         }
    //     }
    //     ActiveOutTip(needActiveOutTip);
    // }

    // public void ActiveOutTip(bool value) 
    // {
    //     if (outTip.activeSelf != value) {
    //         outTip.SetActive(value);
    //     }
    // }

    public static AimLoadChecker ins;
    
    void Awake() {
        ins = this;
    }

    void OnDestroy() {
        if (ins == this) ins = null;
    }

    Sequence outTipSeq;
    public void ShowOutTip() {
        if (outTipSeq != null) {
            outTipSeq.Kill(true);
        }
        outTip.SetActive(true);
        Text text = outTip.GetComponent<Text>();
        Sequence seq = DOTween.Sequence();
        seq.Append(text.DOFade(1, 0f));
        seq.AppendInterval(3f);
        seq.Append(text.DOFade(0, 1f));
        seq.AppendCallback(delegate() {
            outTip.SetActive(false);
            outTipSeq = null;
        });
        seq.SetUpdate(true);
        outTipSeq = seq;
    }
}