using UnityEngine;

/// <summary>
/// 挂在每个 ping 对象上。蓝色圆环闪烁描边，两阶段点击：
/// 阶段0: 依次首次点击4个ping显示模型（全部显示后才进入阶段1）
/// 阶段1: 点击ping显示对应chanrao并隐藏自己
/// touchArray 点击优先级更高。
/// </summary>
public class PingClickHandler : MonoBehaviour
{
    public GameObject chanraoObject;
    public GameObject nextPing;
    public int pingIndex;

    private MeshRenderer _meshRenderer;
    private LineRenderer _outlineRenderer;
    private bool _clickedOnce;
    private static int _firstClickCount = 0;

    void Start()
    {
        _meshRenderer = GetComponent<MeshRenderer>();
        if (_meshRenderer == null) _meshRenderer = GetComponentInChildren<MeshRenderer>();
        CreateBlueOutline();
        StartCoroutine(BlinkOutline());
    }

    void OnEnable()
    {
        _meshRenderer = GetComponent<MeshRenderer>();
        if (_meshRenderer == null) _meshRenderer = GetComponentInChildren<MeshRenderer>();
        if (_meshRenderer != null) _meshRenderer.enabled = false;
        CreateBlueOutline();
        _clickedOnce = false;
        StopAllCoroutines();
        StartCoroutine(BlinkOutline());
    }

    void CreateBlueOutline()
    {
        if (_outlineRenderer != null) return;
        var ringGo = new GameObject("BlueRing");
        ringGo.transform.SetParent(transform, false);
        ringGo.transform.localPosition = new Vector3(0, 0.05f, 0);

        _outlineRenderer = ringGo.AddComponent<LineRenderer>();
        _outlineRenderer.useWorldSpace = true;
        _outlineRenderer.loop = true;
        _outlineRenderer.startWidth = 0.05f;
        _outlineRenderer.endWidth = 0.05f;
        _outlineRenderer.material = new Material(Shader.Find("Unlit/Color"));
        _outlineRenderer.material.color = new Color(0.2f, 0.5f, 1f);
        _outlineRenderer.startColor = new Color(0.2f, 0.5f, 1f);
        _outlineRenderer.endColor = new Color(0.2f, 0.5f, 1f);

        float r = 0.25f;
        int segs = 32;
        _outlineRenderer.positionCount = segs;
        Vector3 center = transform.position + Vector3.up * 0.1f;
        for (int i = 0; i < segs; i++)
        {
            float a = i * 2f * Mathf.PI / segs;
            _outlineRenderer.SetPosition(i, center + new Vector3(Mathf.Cos(a) * r, 0, Mathf.Sin(a) * r));
        }
    }

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

    void OnMouseDown()
    {
        // touchArray 优先：如果同时命中 touchArray point，跳过
        bool blocked = false;
        var allCams = Object.FindObjectsOfType<Camera>();
        foreach (var c in allCams)
        {
            if (!c.enabled) continue;
            var r = c.ScreenPointToRay(Input.mousePosition);
            foreach (var h in Physics.RaycastAll(r))
            {
                if (h.collider != null && h.collider.transform.parent != null
                    && h.collider.transform.parent.name == "touchArray")
                { blocked = true; break; }
            }
            if (blocked) break;
        }
        if (blocked) return;

        // 阶段0: 依次首次点击4个ping
        if (_firstClickCount < 4)
        {
            if (_clickedOnce) return;
            _clickedOnce = true;
            _firstClickCount++;
            StopAllCoroutines();
            if (_meshRenderer != null) _meshRenderer.enabled = true;
            if (_outlineRenderer != null) _outlineRenderer.enabled = true;
            if (nextPing != null) { nextPing.SetActive(true); Debug.Log($"[PingClick] {name} → {nextPing.name} 激活"); }
            Debug.Log($"[PingClick] {name} 第1击 (model显示, {_firstClickCount}/4)");
            var sm = FindObjectOfType<StepManager>();
            if (sm != null) sm.RecordPingStep(pingIndex, false);
        }
        // 阶段1: 全部显示后第二击显示chanrao
        else
        {
            if (!_clickedOnce) return;
            if (chanraoObject != null) { chanraoObject.SetActive(true); Debug.Log($"[PingClick] {chanraoObject.name} 已显示"); }
            StopAllCoroutines();
            if (_meshRenderer != null) _meshRenderer.enabled = false;
            if (_outlineRenderer != null) _outlineRenderer.enabled = false;
            gameObject.SetActive(false);
            Debug.Log($"[PingClick] {name} 第2击 (chanrao显示)");
            var sm = FindObjectOfType<StepManager>();
            if (sm != null) sm.RecordPingStep(pingIndex, true);
        }
    }

    public void UndoSecondClick()
    {
        if (!_clickedOnce) return;
        _clickedOnce = false;
        _firstClickCount--;
        gameObject.SetActive(true);
        if (_meshRenderer != null) _meshRenderer.enabled = false;
        StopAllCoroutines();
        StartCoroutine(BlinkOutline());
    }

    public void UndoShow() { gameObject.SetActive(false); }
}