using ShotSimulator.Tool;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.AI;

namespace ShotSimulator.Target
{
    public enum AIBehaviorState
    {
        None,
        Stand,
        Crouch
    }

    public class AIHumanoidShotTarget : HumanoidShotTarget
    {
        private AIBehaviorState current_BehaviorState;

        [SerializeField]
        private NavMeshAgent m_NavMeshAgent;

        [SerializeField]
        private Vector3 current_TargetPos;

        private bool toBoundary;
        private List<Vector3> m_HidePositions;
        private float m_HideProbability;

        private Vector3 maxBoundaryPos;
        private Vector3 minBoundaryPos;

        private TimeTask m_AIBehaviorStateChangeTimer;
        private float m_CrouchTimeProportion;

        public Animator m_Animator;
        public GameObject brokenFragment;
        public Animator m_ShieldAnimator;
        public GameObject m_ShieldObj;
        private void Start()
        {
            IsRunning = true;
            StartAIBehaviorState();
            SetCurrentTargetPos();
        }

        public void InitHide(List<Vector3> hidePositions, float hideProbability)
        {
            m_HidePositions = hidePositions;
            m_HideProbability = hideProbability;
        }

        public void InitBoundaryPosition(Vector3 min, Vector3 max)
        {
            minBoundaryPos = min;
            maxBoundaryPos = max;
        }

        public void SetCrouchTimeProportion(float crouchTimeProportion)
        {
            m_CrouchTimeProportion = crouchTimeProportion;
        }

        public void SetSpeed(float speed)
        {
            m_NavMeshAgent.speed = speed;
        }

        private new void Update()
        {
            if (!IsRunning) return;

            base.Update();

            if(Vector2.Distance(new Vector2(transform.position.x,transform.position.z), new Vector2(current_TargetPos.x, current_TargetPos.z)) <= 0.5f)
            {
                SetCurrentTargetPos();
            }
        }

        private void SetCurrentTargetPos()
        {
            if (!m_NavMeshAgent.enabled)
            {
                m_NavMeshAgent.enabled = true;
            }

            if (!toBoundary)
            {
                toBoundary = ExtraTool.IsProbabolityInclusive(m_HideProbability) ? false : true;
            }

            if (toBoundary)
            {
                float x = Random.Range(minBoundaryPos.x, maxBoundaryPos.x);
                float z = Random.Range(minBoundaryPos.z, maxBoundaryPos.z);

                current_TargetPos = new Vector3(x, -2f, z);
            }
            else
            {
                current_TargetPos = m_HidePositions[Random.Range(0, m_HidePositions.Count)];

            }
            m_NavMeshAgent.SetDestination(current_TargetPos);
        }

        private void StartAIBehaviorState()
        {
            AIBehaviorState nextState = ExtraTool.IsProbabolityInclusive(m_CrouchTimeProportion) ? AIBehaviorState.Crouch : AIBehaviorState.Stand;
            if (current_BehaviorState != nextState)
            {
                current_BehaviorState = nextState;

                SwitchAIBehaviorState(current_BehaviorState);
            }

            m_AIBehaviorStateChangeTimer = TimerSystem.GetInstance().AddTimeTask(StartAIBehaviorState, 5f);
        }
        private void SwitchAIBehaviorState(AIBehaviorState state)
        {
            switch (state)
            {
                case AIBehaviorState.Stand:
                    m_Animator.SetTrigger("idle");
                    break;
                case AIBehaviorState.Crouch:
                    m_Animator.SetTrigger("squat");
                    break;
            }
        }
        public override void CauseHumanoidPartReduceHP(HumanoidPartShotTarget part)
        {
            base.CauseHumanoidPartReduceHP(part);

            if ((m_MaxHealth - Health) == 1)
            {
                m_ShieldAnimator.gameObject.SetActive(true);
                m_ShieldObj.SetActive(false);
            }
        }
        private void OnDestroy()
        {
            TimerSystem.GetInstance().RemoveTimeTask(m_AIBehaviorStateChangeTimer);

            if (Health <= 0)
            {
                GameObject effectObj = Instantiate(Resources.Load<GameObject>("Prefabs/BrokenEffect"), transform.position + new Vector3(0, 0.5f, 0), Quaternion.identity);
                effectObj.transform.localScale = Vector3.one * 2;
                SpawnDebris();
            }
        }
        private void SpawnDebris()
        {
            brokenFragment.transform.SetParent(null);
            brokenFragment.SetActive(true);

            foreach (Transform child in brokenFragment.transform)
            {
                // 随机选择碎片预制体
                GameObject selectedDebris = child.gameObject;

                // 生成参数设置
                Vector3 spawnPos = transform.position + Random.insideUnitSphere * 0.5f;
                Quaternion spawnRot = Random.rotation;

                selectedDebris.transform.position = spawnPos;
                selectedDebris.transform.rotation = spawnRot;
                // 添加物理组件
                Rigidbody rb = selectedDebris.GetComponent<Rigidbody>();
                if (rb == null) rb = selectedDebris.AddComponent<Rigidbody>();

                // 施加随机方向力
                Vector3 randomDir = new Vector3(Random.Range(-1f, 1f), Random.Range(0.5f, 1f), Random.Range(-1f, 1f)).normalized;

                float force = Random.Range(5f, 15f);
                rb.AddForce(randomDir * force, ForceMode.Impulse);

                // 添加随机旋转
                rb.AddTorque(Random.insideUnitSphere * 50f, ForceMode.Impulse);
            }

            Destroy(brokenFragment, 0.5f);
        }
        public void SetPause(bool pause)
        {
            IsRunning = !pause;
            m_AIBehaviorStateChangeTimer.pause = pause;
            m_NavMeshAgent.isStopped = pause;
        }
    }
}