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

public class ArmBow : MonoBehaviour
{
    [SerializeField] AnimationPlayer AP_arm;
    [SerializeField] AnimationPlayer AP_bow;
    [SerializeField] GameObject arrow;
    [SerializeField] BowCamera bowCamera;
    public HashSet<TargetBody> validTargets = new HashSet<TargetBody>();

    public int shootBackTime = 0;

    private bool canShoot = false;
    private bool pulling = false;
    private bool readying = false;
    //禁止准备的外部接口
    public bool banReady = false;
    //禁止射击的外部接口
    public bool banShoot = false;

    public static ArmBow ins;
    public Quaternion[] recordRotations = new Quaternion[100];
    public float[] recordRotationVars = new float[99];
    public int recordCount = 0;

    void Start()
    {
        ins = this;
        this.readyShoot();

        //initdata
        int currentShootLevel = LoginMgr.myUserInfo.shootLevel;
        int[] shootBackTimes = {0, 1, 5};
        shootBackTime = shootBackTimes[currentShootLevel];
    }

    void FixedUpdate()
    {
        if (this.canShoot)
        {
            if (DebugBowPower.ins) DebugBowPower.ins.DoUpdate();
        }
    }

    void Update()
    {
        if (Input.GetKeyDown(KeyCode.Q)) 
        {
            this.ADS_fire();
        }
        if (this.pulling) {
            this.bowCamera.updateFollowPullBow();
        } 
        else if (!this.canShoot)
        {
            this.bowCamera.updateGiveUpPullBow();
        }
    }

    void onComplete(AnimationPlayerCompleteResult res) {
        if (res.index == 0) {
            this.readying = true;
            this.idle();
            this.Invoke("idleToADS", 0.1f);
        }
        else if (res.index == 2) {
            this.ADS_idle();
        }
    }

    public void ready() {
        if (banReady) return;
        GameMgr.ins.gameMode.PauseTimeCounting(this);
        GameMgr.ins.gameMode.onBowReady();
        this.arrow.SetActive(true);
        AP_arm.play(0, WrapMode.Once);
        AP_bow.play(0, WrapMode.Once);
        AP_arm.completeCallback = onComplete;
        this.pulling = false;
        this.canShoot = false;
    }

    void idle() {
        AP_arm.play(1, WrapMode.Loop);
        AP_bow.play(1, WrapMode.Loop);
        AP_arm.completeCallback = null;
        this.pulling = false;
        this.canShoot = false;
        if (DebugBowPower.ins) DebugBowPower.ins.Init();
    }

    public void idleToADS() {
        AP_arm.play(2, WrapMode.Once);
        AP_bow.play(2, WrapMode.Once);
        AP_arm.completeCallback = onComplete;
        this.pulling = true;
        this.canShoot = false;
    }

    void ADS_idle() {
        GameMgr.ins.gameMode.ResumeTimeCounting(this);
        this.canShoot = true;
        this.pulling = false;
        if (DebugBowPower.ins) DebugBowPower.ins.PullFinish();
    }

    public void ADS_fire() {
        if (!canShoot || banShoot || GameMgr.ins.gamePause) return;
        GameMgr.ins.gameMode.onBowShoot();
        this.pulling = false;
        this.canShoot = false;
        this.readying = false;
        AP_bow.play(0, WrapMode.Once);
        this.arrow.SetActive(false);
        shoot();
    }

    public void readyShoot() {
        this.bowCamera.setFieldOfView(60, false);
        // this.gameObject.SetActive(true);
        this.ready();
    }

    void shoot() {
        RaycastHit raycastHit = CrossHair.ins.GetRaycastHit();

        // 筛选出一个稳定的发射角度---start
        Quaternion best_rotation = this.bowCamera.transform.rotation;
        if (recordCount >= recordRotations.Length) {
            int single_check_count = 6;
            float min_wave = float.MaxValue;
            for (int i = 0; i < recordRotationVars.Length; i++)
            {
                recordRotationVars[i] = Quaternion.Angle(recordRotations[i], recordRotations[i + 1]);
                if (i >= single_check_count - 1) 
                {
                    float wave = 0;
                    for (int j = i; j > i - single_check_count; j--)
                    {
                        wave += recordRotationVars[j];
                    }
                    if (wave < min_wave)
                    {
                        min_wave = wave;
                        int best_rotation_index = i - single_check_count + 1 - this.shootBackTime;
                        if (best_rotation_index < 0) best_rotation_index = 0;
                        best_rotation = recordRotations[best_rotation_index];
                    }
                }
            }
        }
        // if (recordCount >= recordRotations.Length) {
        //     int single_check_count = 6;
        //     float min_wave = float.MaxValue;
        //     for (int i = 0; i < recordRotationVars.Length; i++)
        //     {
        //         recordRotationVars[i] = Quaternion.Angle(recordRotations[i], recordRotations[i + 1]);
        //         if (i >= single_check_count - 1) 
        //         {
        //             float wave = 0;
        //             for (int j = i; j > i - single_check_count; j--)
        //             {
        //                 wave += recordRotationVars[j];
        //             }
        //             if (wave < min_wave)
        //             {
        //                 min_wave = wave;
        //                 best_rotation = recordRotations[i - single_check_count + 1];
        //             }
        //         }
        //     }
        // }
        // 筛选出一个稳定的发射角度---end
        
        Vector3 shootOutPosition = this.bowCamera.transform.position;
        //如果弓指向太过朝下，在弓口发射可能会射穿地面，因此需要角度适当时，才从弓口射出。
        if (BowCamera.ins.transform.localEulerAngles.x < 30) shootOutPosition += this.bowCamera.transform.forward * 1.5f;
        GameObject arrowCopy = GameObject.Instantiate(this.arrow, shootOutPosition, best_rotation);

        Vector3 s1 = arrowCopy.transform.localScale;
        Vector3 s2 = bowCamera.transform.localScale;
        arrowCopy.transform.localScale = new Vector3(s1.x * s2.x, s1.y * s2.y, s1.z * s2.z);

        // arrowCopy.transform.LookAt(rayHitPoint);

        Arrow arrowComp = arrowCopy.AddComponent<Arrow>();
        arrowComp.armBow = this;
        arrowComp.shootOutPosition = shootOutPosition;
        arrowComp.raycastHit = raycastHit;
        // Arrow.speed = DebugBowPower.ins.getPowerPercent() * 100f;
        // Arrow.speed = BaseSpeedSlider.ins.getValue();
        // Arrow.speed = Mathf.Pow(ShootCheck.ins.shootSpeed, ShootCheck.ins.shootSpeed < 13 ? 2f: (ShootCheck.ins.shootSpeed < 15 ? 2.5f : 3.0f));

        if (ShootCheck.ins && !GameMgr.debugInEditor) 
        {
            Arrow.speed = GameMgr.RealSizeToGameSize(ShootCheck.ins.shootSpeed);
        }   

        arrowCopy.SetActive(true);  
        arrow.SetActive(false);

        AudioMgr.ins.PlayShoot(AudioMgr.GetAudioSource(arrowCopy));
        // this.gameObject.SetActive(false);
    }

    public void OnEnable() 
    {
        AudioMgr.GetAudioSource(this.gameObject).clip = null;
    }

    public void Hide()
    {
        this.transform.localScale = Vector3.zero;
    }

    public void Show()
    {
        this.transform.localScale = new Vector3(1, 1, 1);
    }

    public bool NeedCrossHair()
    {
        return canShoot;
    }

    //debug
    public void mouseDown() 
    {
        if (!this.readying) return;
        if (this.pulling || this.canShoot) return;
        this.idleToADS();
    }

    public void mouseUp() 
    {
        if (!this.readying) return;
        if (this.pulling) {
            this.idle();
        } else if (this.canShoot) {
            this.ADS_fire();
        }
    }
}