using UnityEditor;
using UnityEngine;

namespace LeTai.Asset.TranslucentImage.Editor
{
public class TranslucentImageShaderGUI : ShaderGUI
{
    public override void OnGUI(MaterialEditor materialEditor, MaterialProperty[] properties)
    {
        DrawProperties(materialEditor, properties, false);
    }

    public static void DrawProperties(MaterialEditor materialEditor, MaterialProperty[] properties, bool skipUnimportants)
    {
        materialEditor.SetDefaultGUIWidths();

        for (var i = skipUnimportants ? 1 : 0; i < properties.Length; i++)
        {
            var prop = properties[i];

            if (skipUnimportants && prop.name == "_StencilComp")
                break;

            if ((prop.flags & MaterialProperty.PropFlags.HideInInspector) != 0)
                continue;

            switch (prop.name)
            {
            default:
                float h = materialEditor.GetPropertyHeight(prop, prop.displayName);
                Rect  r = EditorGUILayout.GetControlRect(true, h);
                materialEditor.ShaderProperty(r, prop, GetPropGUIContent(prop));
                break;
            }
        }

        EditorGUILayout.Space();

        if (!skipUnimportants)
        {
            EditorGUILayout.Space();
            if (UnityEngine.Rendering.SupportedRenderingFeatures.active.editableMaterialRenderQueue)
                materialEditor.RenderQueueField();
            materialEditor.EnableInstancingField();
            materialEditor.DoubleSidedGIField();
        }
    }

    static readonly GUIContent LABEL = new GUIContent();

    static GUIContent GetPropGUIContent(MaterialProperty prop)
    {
        switch (prop.name)
        {
        case "_Vibrancy":
            LABEL.tooltip = "(De)Saturate the image, 1 is normal, 0 is black and white, below zero make the image negative";
            break;
        case "_Brightness":
            LABEL.tooltip = "Brighten/darken the image";
            break;
        case "_Flatten":
            LABEL.tooltip = "Flatten the color behind to help keep contrast on varying background";
            break;
        default:
            LABEL.tooltip = "";
            break;
        }

        LABEL.text = prop.displayName;

        return LABEL;
    }
}
}