using UnityEngine;

public class PingClickHandler : MonoBehaviour
{
    public GameObject chanraoObject, nextPing;
    public int pingIndex;
    private MeshRenderer _modelRenderer, _outlineMesh;
    private bool _modelShown;
    private bool _isBlinking;
    
    // 全局静态变量，防止同一帧内有多个 PingClickHandler 被同时触发
    private static int _lastClickedFrame = -1;
    // 实例变量，记录自己被启用（或重新闪烁）的那一帧
    private int _enableFrame = -1;
    
    public bool CanBeClicked() { return _isBlinking; }

    void OnEnable()
    {
        _enableFrame = Time.frameCount;
        
        _modelRenderer = GetComponent<MeshRenderer>();
        if (_modelRenderer == null) _modelRenderer = GetComponentInChildren<MeshRenderer>();
        foreach (var r in GetComponentsInChildren<Renderer>(true)) r.enabled = false;

        CreateOutlineMesh();
        _modelShown = false;
        _isBlinking = true;
        StopAllCoroutines();
        StartCoroutine(BlinkOutline());
    }

    void CreateOutlineMesh()
    {
        if (_outlineMesh != null) return;
        var mf = GetComponent<MeshFilter>();
        if (mf == null) mf = GetComponentInChildren<MeshFilter>();
        if (mf == null || mf.sharedMesh == null) return;
        var shader = Shader.Find("Custom/OutlineUnlit");
        if (shader == null) return;
        var mat = new Material(shader);
        mat.SetColor("_OutlineColor", new Color(0.2f, 0.5f, 1f, 1f));
        mat.SetColor("_MainColor", new Color(0, 0, 0, 0));
        mat.SetFloat("_OutlineWidth", OutlineConfig.Width);
        var go = new GameObject("Outline");
        go.transform.SetParent(transform, false);
        go.transform.position += Vector3.up * 0.05f;
        go.AddComponent<MeshFilter>().sharedMesh = mf.sharedMesh;
        _outlineMesh = go.AddComponent<MeshRenderer>();
        _outlineMesh.material = mat;
    }

    System.Collections.IEnumerator BlinkOutline()
    {
        if (_outlineMesh != null) _outlineMesh.enabled = true;
        yield return new WaitForSeconds(0.4f);
        while (true) { if (_outlineMesh != null) _outlineMesh.enabled = !_outlineMesh.enabled; yield return new WaitForSeconds(0.4f); }
    }

    void Update()
    {
        // 只检测正在闪烁的 ping
        if (!_isBlinking) return;
        if (!Input.GetMouseButtonDown(0)) return;
        
        // 防御 1：防止刚被激活的同一帧内立刻触发（比如点击鞋子的一瞬间 ping.004 被激活，此时鼠标左键按下状态依然为 true）
        if (Time.frameCount == _enableFrame) return;
        
        // 防御 2：防止同一帧内有多个 ping 同时触发（执行顺序导致的状态延迟问题）
        if (Time.frameCount == _lastClickedFrame) return;
        
        // 如果点在 UI 上，不处理
        if (UnityEngine.EventSystems.EventSystem.current != null &&
            UnityEngine.EventSystems.EventSystem.current.IsPointerOverGameObject())
            return;
        
        // 找到当前渲染画面的相机
        Camera activeCamera = null;
        foreach (var c in Camera.allCameras)
        {
            if (c.enabled && c.gameObject.activeInHierarchy)
            {
                activeCamera = c;
            }
        }
        if (activeCamera == null) return;
        
        // 计算自己到鼠标的屏幕距离
        Vector3 screenPos = activeCamera.WorldToScreenPoint(transform.position);
        if (screenPos.z < 0) return; // 在相机背后
        
        Vector2 mousePos = Input.mousePosition;
        float myDist = Vector2.Distance(mousePos, new Vector2(screenPos.x, screenPos.y));
        
        // 检查是否有其他正在闪烁的 ping 比我更近
        var allHandlers = FindObjectsOfType<PingClickHandler>();
        foreach (var h in allHandlers)
        {
            if (h == this) continue;
            if (!h._isBlinking) continue;
            if (!h.gameObject.activeInHierarchy) continue;
            
            Vector3 otherScreen = activeCamera.WorldToScreenPoint(h.transform.position);
            if (otherScreen.z < 0) continue;
            
            float otherDist = Vector2.Distance(mousePos, new Vector2(otherScreen.x, otherScreen.y));
            if (otherDist < myDist) return; // 别人比我更近，让别人处理
        }
        
        // 我是离鼠标最近的闪烁中的 ping！
        if (myDist < 120f) // 稍微放宽一点阈值，120像素内都算点中
        {
            Debug.Log($"[PingClick] 屏幕坐标命中: {name} (距离={myDist:F1}px)");
            _lastClickedFrame = Time.frameCount; // 锁定当前帧，其他 ping 不准再触发
            _isBlinking = false;
            PerformClick();
        }
    }

    public void PerformClick()
    {
        if (!_modelShown)
        {
            _modelShown = true;
            _isBlinking = false;
            ActionHistory.Push(ActionHistory.ActionType.PingFirst, this);
            StopAllCoroutines();
            if (_modelRenderer != null) _modelRenderer.enabled = true;
            foreach (var r in GetComponentsInChildren<Renderer>(true)) r.enabled = true;
            if (_outlineMesh != null) _outlineMesh.enabled = false;
            if (nextPing != null) nextPing.SetActive(true);
            else 
            {
                var chanraotuibu = GameObject.Find("chanraotuibu");
                if (chanraotuibu == null)
                {
                    var mi = GameObject.Find("manInjury");
                    if (mi != null)
                    {
                        var t = mi.transform.Find("chanraotuibu");
                        if (t != null) chanraotuibu = t.gameObject;
                    }
                }
                if (chanraotuibu != null) chanraotuibu.SetActive(true);
                Debug.Log($"[PingClick] {name} 是最后一个 ping 模型，现已激活 chanraotuibu");
            }
            
            if (nextPing != null) Debug.Log($"[PingClick] {name} 模型显示, 激活 {nextPing.name}");
            else Debug.Log($"[PingClick] {name} 模型显示, 激活下一个");
            
            var sm = FindObjectOfType<StepManager>();
            if (sm != null) sm.RecordPingStep(pingIndex, false);
        }
        else
        {
            if (chanraoObject != null) { chanraoObject.SetActive(true); Debug.Log($"[PingClick] {name} → {chanraoObject.name}"); }
            HideSelf();
            ActionHistory.Push(ActionHistory.ActionType.PingSecond, this);
            var sm = FindObjectOfType<StepManager>();
            if (sm != null) sm.RecordPingStep(pingIndex, true);
            
            var pings = Object.FindObjectsOfType<PingClickHandler>();
            int remaining = 0;
            foreach (var p in pings)
            {
                if (p.gameObject.activeInHierarchy && (p._isBlinking || p._modelShown))
                    remaining++;
            }
            // 自己刚刚 HideSelf 了，如果没有其他活跃的 ping 了
            if (remaining <= 1)
            {
                Debug.Log("[PingClick] 所有的 ping 都已经绑成 chanrao 了！播放完成语音。");
                var am = FindObjectOfType<AudioManager>();
                if (am != null)
                {
#if UNITY_EDITOR
                    var finishClip = UnityEditor.AssetDatabase.LoadAssetAtPath<AudioClip>("Assets/Audio/people/伤员一切正常，包扎完毕.mp3");
                    if (finishClip != null) am.PlayVoice(finishClip);
#endif
                }
                
                var uiMgr = FindObjectOfType<UIManager>();
                if (uiMgr != null)
                {
                    uiMgr.HideVideo();
                }
            }
        }
    }

    public void ReEnableBorder() 
    { 
        if (!_modelShown) return;

        if (chanraoObject != null && chanraoObject.activeSelf) 
        {
            return;
        }

        _isBlinking = true; 
        _enableFrame = Time.frameCount; // 防止重置瞬间被点中

        if (_outlineMesh != null) 
        { 
            _outlineMesh.enabled = true; 
            StopAllCoroutines(); 
            StartCoroutine(BlinkOutline()); 
        } 
    }

    public void DisableBorder()
    {
        _isBlinking = false;
        if (_outlineMesh != null) _outlineMesh.enabled = false;
        StopAllCoroutines();
    }

    public void UndoSecondClick() 
    { 
        if (chanraoObject != null) chanraoObject.SetActive(false);
        ShowSelf();
        _modelShown = true; 
        _isBlinking = true;
        _enableFrame = Time.frameCount; // 防止重置瞬间被点中
        if (_outlineMesh != null) _outlineMesh.enabled = true;
        StopAllCoroutines();
        StartCoroutine(BlinkOutline());
    }
    public void UndoShow()
    {
        _modelShown = false;
        _isBlinking = false;
        StopAllCoroutines();
        if (chanraoObject != null) chanraoObject.SetActive(false);
        foreach (var r in GetComponentsInChildren<Renderer>(true)) r.enabled = false;
        gameObject.SetActive(false);
    }

    private void HideSelf()
    {
        foreach (var r in GetComponentsInChildren<Renderer>(true)) r.enabled = false;
        _isBlinking = false;
        StopAllCoroutines();
        gameObject.SetActive(false);
    }

    private void ShowSelf()
    {
        foreach (var r in GetComponentsInChildren<Renderer>(true)) r.enabled = true;
        if (_outlineMesh != null) _outlineMesh.enabled = false;
    }
    
    public void ResetState()
    {
        _modelShown = false;
        _isBlinking = true;
        _enableFrame = Time.frameCount; // 防止重置瞬间被点中
        if (_modelRenderer != null) _modelRenderer.enabled = false;
        foreach (var r in GetComponentsInChildren<Renderer>(true)) { if (_outlineMesh != null && r == _outlineMesh) continue; r.enabled = false; }
        if (_outlineMesh != null) _outlineMesh.enabled = true;
        StopAllCoroutines();
        StartCoroutine(BlinkOutline());
    }
}