using UnityEngine;

/// <summary>
/// 鼠标悬停时物体呼吸效果的脚本
/// </summary>
public class HoverBreathingEffect : MonoBehaviour
{
    [Header("呼吸灯设置")]
    public Color breathColor = Color.cyan; // 呼吸灯颜色
    public float breathSpeed = 1.7f;      // 呼吸速度
    [Range(0f, 1f)]
    public float minIntensity = 0.2f;      // 最小亮度
    [Range(0f, 1f)]
    public float maxIntensity = 0.8f;      // 最大亮度

    [Header("悬停触发设置")]
    public float hoverDelay = 1.5f;       // 悬停触发延时（秒）

    private Material originalMaterial;
    private Material breathMaterial;
    private Renderer objectRenderer;

    private bool isHovering = false;
    private float hoverTimer = 0f;
    private bool isBreathing = false;
    private float breathPhase = 0f;

    void Start()
    {
        // 获取渲染器和原始材质
        objectRenderer = GetComponent<Renderer>();
        if (objectRenderer != null)
        {
            originalMaterial = objectRenderer.material;
            // 创建用于呼吸效果的新材质实例，避免影响其他物体
            breathMaterial = new Material(originalMaterial);
            objectRenderer.material = breathMaterial;
        }
        else
        {
            Debug.LogWarning("HoverBreathingEffect 需要 Renderer 组件。", this);
            enabled = false;
        }
    }

    void OnMouseEnter()
    {
        // 鼠标进入，开始计时
        isHovering = true;
        hoverTimer = 0f;
    }

    void OnMouseExit()
    {
        // 鼠标移出，重置所有状态
        isHovering = false;
        hoverTimer = 0f;
        StopBreathing();
    }

    void Update()
    {
        HandleHoverTimer();
        if (isBreathing)
        {
            UpdateBreathingEffect();
        }
    }

    /// <summary>
    /// 悬停时间计算
    /// </summary>
    void HandleHoverTimer()
    {
        if (isHovering && !isBreathing)
        {
            hoverTimer += Time.deltaTime;
            if (hoverTimer >= hoverDelay)
            {
                // 达到延时，开始呼吸效果
                StartBreathing();
            }
        }
    }

    /// <summary>
    /// 开始出发呼吸灯效果
    /// </summary>
    void StartBreathing()
    {
        isBreathing = true;
        breathPhase = 0f;
        // 可以在这里触发音效或其他事件
        // Debug.Log("开始呼吸效果: " + gameObject.name);
    }

    /// <summary>
    /// 结束呼吸灯效果
    /// </summary>
    void StopBreathing()
    {
        if (isBreathing)
        {
            isBreathing = false;
            // 恢复为原始材质颜色
            if (breathMaterial != null && originalMaterial != null)
            {
                breathMaterial.color = originalMaterial.color;
            }
        }
    }

    /// <summary>
    /// 刷新显示颜色
    /// </summary>
    void UpdateBreathingEffect()
    {
        // 使用正弦函数计算平滑的呼吸曲线
        breathPhase += breathSpeed * Time.deltaTime;
        float t = (Mathf.Sin(breathPhase) + 1f) * 0.5f; // 将范围映射到 0~1
        float intensity = Mathf.Lerp(minIntensity, maxIntensity, t);

        // 混合呼吸颜色和原始颜色
        Color targetColor = Color.Lerp(originalMaterial.color, breathColor, intensity);
        breathMaterial.color = targetColor;

        // 如果也想影响自发光（如果Shader支持），可以取消注释下行
        // breathMaterial.SetColor("_EmissionColor", targetColor * intensity);
    }
}