using UnityEngine;
using UnityEngine.UI;
using System.Collections;

/// <summary>
/// 多层Canvas测试工具
/// 用于测试MainPanel在多层Canvas环境下的BodyAndOrgans可见性控制
/// </summary>
public class MultiLayerCanvasTest : MonoBehaviour
{
    [Header("测试Canvas")]
    public Canvas[] TestCanvases;
    
    [Header("控制按钮")]
    public Button CreateOverlayButton;
    public Button RemoveOverlayButton;
    public Button ToggleCanvasOrderButton;
    public Button DebugInfoButton;
    
    [Header("信息显示")]
    public Text StatusText;
    public InputField SortingOrderInput;
    
    private MainPanel mainPanel;
    private int overlayCounter = 0;
    
    void Start()
    {
        // 查找MainPanel
        mainPanel = FindObjectOfType<MainPanel>();
        
        // 设置按钮事件
        if (CreateOverlayButton != null)
            CreateOverlayButton.onClick.AddListener(CreateOverlayCanvas);
            
        if (RemoveOverlayButton != null)
            RemoveOverlayButton.onClick.AddListener(RemoveLastOverlay);
            
        if (ToggleCanvasOrderButton != null)
            ToggleCanvasOrderButton.onClick.AddListener(ToggleCanvasOrder);
            
        if (DebugInfoButton != null)
            DebugInfoButton.onClick.AddListener(LogAllCanvasInfo);
            
        UpdateStatusDisplay();
    }
    
    /// <summary>
    /// 创建覆盖Canvas
    /// </summary>
    public void CreateOverlayCanvas()
    {
        overlayCounter++;
        
        // 创建新的Canvas GameObject
        GameObject overlayObj = new GameObject($"TestOverlay_{overlayCounter}");
        Canvas overlayCanvas = overlayObj.AddComponent<Canvas>();
        overlayObj.AddComponent<CanvasScaler>();
        overlayObj.AddComponent<GraphicRaycaster>();
        
        // 设置Canvas属性
        overlayCanvas.renderMode = RenderMode.ScreenSpaceOverlay;
        
        // 获取用户输入的sortingOrder，默认比MainPanel高
        int targetOrder = 10;
        if (SortingOrderInput != null && !string.IsNullOrEmpty(SortingOrderInput.text))
        {
            if (int.TryParse(SortingOrderInput.text, out int userOrder))
            {
                targetOrder = userOrder;
            }
        }
        overlayCanvas.sortingOrder = targetOrder;
        
        // 添加一个半透明背景来模拟覆盖效果
        GameObject background = new GameObject("Background");
        background.transform.SetParent(overlayObj.transform, false);
        
        Image bgImage = background.AddComponent<Image>();
        bgImage.color = new Color(0f, 0f, 0f, 0.3f); // 半透明黑色
        
        // 设置背景填满整个屏幕
        RectTransform bgRect = background.GetComponent<RectTransform>();
        bgRect.anchorMin = Vector2.zero;
        bgRect.anchorMax = Vector2.one;
        bgRect.offsetMin = Vector2.zero;
        bgRect.offsetMax = Vector2.zero;
        
        // 添加一个文本标签
        GameObject label = new GameObject("Label");
        label.transform.SetParent(overlayObj.transform, false);
        
        Text labelText = label.AddComponent<Text>();
        labelText.text = $"测试覆盖层 {overlayCounter}\nSorting Order: {targetOrder}";
        labelText.font = Resources.GetBuiltinResource<Font>("Arial.ttf");
        labelText.fontSize = 24;
        labelText.color = Color.white;
        labelText.alignment = TextAnchor.MiddleCenter;
        
        RectTransform labelRect = label.GetComponent<RectTransform>();
        labelRect.anchorMin = new Vector2(0.5f, 0.5f);
        labelRect.anchorMax = new Vector2(0.5f, 0.5f);
        labelRect.sizeDelta = new Vector2(300, 100);
        
        // 添加关闭按钮
        CreateCloseButton(overlayObj, overlayCanvas);
        
        Debug.Log($"创建覆盖Canvas: {overlayObj.name}, SortingOrder: {targetOrder}");
        UpdateStatusDisplay();
    }
    
    /// <summary>
    /// 为覆盖Canvas添加关闭按钮
    /// </summary>
    private void CreateCloseButton(GameObject canvasObj, Canvas canvas)
    {
        GameObject buttonObj = new GameObject("CloseButton");
        buttonObj.transform.SetParent(canvasObj.transform, false);
        
        Button closeButton = buttonObj.AddComponent<Button>();
        Image buttonImage = buttonObj.AddComponent<Image>();
        buttonImage.color = Color.red;
        
        // 设置按钮位置（右上角）
        RectTransform buttonRect = buttonObj.GetComponent<RectTransform>();
        buttonRect.anchorMin = new Vector2(1f, 1f);
        buttonRect.anchorMax = new Vector2(1f, 1f);
        buttonRect.anchoredPosition = new Vector2(-50, -50);
        buttonRect.sizeDelta = new Vector2(80, 40);
        
        // 添加按钮文本
        GameObject buttonText = new GameObject("Text");
        buttonText.transform.SetParent(buttonObj.transform, false);
        
        Text text = buttonText.AddComponent<Text>();
        text.text = "关闭";
        text.font = Resources.GetBuiltinResource<Font>("Arial.ttf");
        text.fontSize = 16;
        text.color = Color.white;
        text.alignment = TextAnchor.MiddleCenter;
        
        RectTransform textRect = buttonText.GetComponent<RectTransform>();
        textRect.anchorMin = Vector2.zero;
        textRect.anchorMax = Vector2.one;
        textRect.offsetMin = Vector2.zero;
        textRect.offsetMax = Vector2.zero;
        
        // 设置按钮点击事件
        closeButton.onClick.AddListener(() => {
            Debug.Log($"关闭覆盖Canvas: {canvasObj.name}");
            DestroyImmediate(canvasObj);
            UpdateStatusDisplay();
        });
    }
    
    /// <summary>
    /// 移除最后创建的覆盖层
    /// </summary>
    public void RemoveLastOverlay()
    {
        if (overlayCounter > 0)
        {
            GameObject overlay = GameObject.Find($"TestOverlay_{overlayCounter}");
            if (overlay != null)
            {
                Debug.Log($"移除覆盖Canvas: {overlay.name}");
                DestroyImmediate(overlay);
            }
            overlayCounter--;
            UpdateStatusDisplay();
        }
    }
    
    /// <summary>
    /// 切换Canvas排序顺序
    /// </summary>
    public void ToggleCanvasOrder()
    {
        Canvas[] allCanvas = FindObjectsOfType<Canvas>();
        
        foreach (var canvas in allCanvas)
        {
            if (canvas.name.Contains("TestOverlay"))
            {
                // 随机改变测试Canvas的sortingOrder
                canvas.sortingOrder = Random.Range(-5, 20);
                Debug.Log($"随机调整Canvas {canvas.name} 的SortingOrder为: {canvas.sortingOrder}");
            }
        }
        
        UpdateStatusDisplay();
    }
    
    /// <summary>
    /// 输出所有Canvas信息
    /// </summary>
    public void LogAllCanvasInfo()
    {
        Debug.Log("=== 多层Canvas测试 - 所有Canvas信息 ===");
        
        Canvas[] allCanvas = FindObjectsOfType<Canvas>();
        var sortedCanvas = new System.Collections.Generic.List<Canvas>(allCanvas);
        sortedCanvas.Sort((a, b) => a.sortingOrder.CompareTo(b.sortingOrder));
        
        foreach (var canvas in sortedCanvas)
        {
            Debug.Log($"Canvas: {canvas.name}, Order: {canvas.sortingOrder}, Active: {canvas.gameObject.activeInHierarchy}");
            
            // 检查是否有MainPanel
            if (canvas.GetComponentInChildren<MainPanel>() != null)
            {
                Debug.Log($"  └── 包含MainPanel!");
            }
            
            // 检查其他BasePanel
            var panels = canvas.GetComponentsInChildren<BasePanel>();
            foreach (var panel in panels)
            {
                if (panel != null && panel.gameObject.activeInHierarchy)
                {
                    Debug.Log($"  └── Panel: {panel.GetType().Name}");
                }
            }
        }
        
        // 显示BodyAndOrgans当前状态
        if (mainPanel != null && mainPanel.BodyAndOrgans != null)
        {
            Debug.Log($"BodyAndOrgans 当前状态: {(mainPanel.BodyAndOrgans.activeInHierarchy ? "显示" : "隐藏")}");
        }
        
        Debug.Log("=== Canvas信息结束 ===");
    }
    
    /// <summary>
    /// 更新状态显示
    /// </summary>
    private void UpdateStatusDisplay()
    {
        if (StatusText == null) return;
        
        string status = "多层Canvas测试状态:\n";
        
        Canvas[] allCanvas = FindObjectsOfType<Canvas>();
        status += $"总Canvas数量: {allCanvas.Length}\n";
        
        int overlayCount = 0;
        foreach (var canvas in allCanvas)
        {
            if (canvas.name.Contains("TestOverlay"))
            {
                overlayCount++;
            }
        }
        status += $"测试覆盖层数量: {overlayCount}\n";
        
        if (mainPanel != null && mainPanel.BodyAndOrgans != null)
        {
            bool isVisible = mainPanel.BodyAndOrgans.activeInHierarchy;
            status += $"BodyAndOrgans状态: {(isVisible ? "显示" : "隐藏")}\n";
        }
        
        StatusText.text = status;
    }
    
    void Update()
    {
        // 每秒更新一次状态
        if (Time.frameCount % 60 == 0)
        {
            UpdateStatusDisplay();
        }
    }
}