using UnityEngine;

/// <summary>
/// 全局昼夜着色参数（由 CECSunMoon 在刷新 m_fDNFactor 后调用 Apply）。
/// Global day/night shader globals; CECSunMoon calls Apply after updating m_fDNFactor.
/// </summary>
[System.Serializable]
public class GlobalShaderVariableSetting
{
    [Range(0.0f, 1.0f)]
    public float nightControl;
    public Color ambientDayColor = Color.white;
    public Color dirLtColorDayColor = Color.white;
    public Color ambientNightColor = new Color(0.113f, 0.113f, 0.113f, 1f);
    public Color dirLtColorNightColor = new Color(0.123f, 0.123f, 0.123f, 1f);

    static readonly int AmbientDayColorHash = Shader.PropertyToID("_AmbientDayColor");
    static readonly int DirLtColorDayColorHash = Shader.PropertyToID("_DirLtColorDayColor");
    static readonly int AmbientNightColorHash = Shader.PropertyToID("_AmbientNightColor");
    static readonly int DirLtColorNightColorHash = Shader.PropertyToID("_DirLtColorNightColor");
    static readonly int NightColorControlHash = Shader.PropertyToID("_NightColorControl");

    /// <param name="nightColorControl">0=昼 1=夜，与 PC m_fDNFactor 一致 // 0=day, 1=night, same as PC m_fDNFactor</param>
    public void Apply(float nightColorControl)
    {
        nightControl = Mathf.Clamp01(nightColorControl);
        Shader.SetGlobalColor(AmbientDayColorHash, ambientDayColor);
        Shader.SetGlobalColor(DirLtColorDayColorHash, dirLtColorDayColor);
        Shader.SetGlobalColor(AmbientNightColorHash, ambientNightColor);
        Shader.SetGlobalColor(DirLtColorNightColorHash, dirLtColorNightColor);
        Shader.SetGlobalFloat(NightColorControlHash, nightControl);
    }
}