using UnityEngine;
using System.Collections.Generic;
using Unity.VisualScripting;

[System.Serializable]
public class TextureConfig
{
    public Texture2D texture;
    public Vector2 position = new Vector2(0.25f, 0.25f);
    public Vector2 scale = new Vector2(0.5f, 0.5f);
    public float rotation = 0f;
}

public class DynamicTileController : MonoBehaviour 
{
    public Material material;
    public List<TextureConfig> textureConfigs = new List<TextureConfig>();
    
    [Header("通用设置")]
    [Range(0, 0.25f)]
    public float borderSize = 0.1f;
    [Range(0, 0.5f)]
    public float outerGapWidth = 0f;

    private const int MAX_TEXTURES = 6;

    void Update()
    {
        UpdateMaterial();
    }

    void UpdateMaterial()
    {
        // 限制最大贴图数量
        int count = Mathf.Min(textureConfigs.Count, MAX_TEXTURES);
        material.SetInt("_TextureCount", count);
        
        // 准备数组
        Vector4[] positions = new Vector4[MAX_TEXTURES];
        Vector4[] scales = new Vector4[MAX_TEXTURES];
        float[] rotations = new float[MAX_TEXTURES];
        // Texture2D[] textures = new Texture2D[MAX_TEXTURES];
        Texture2DArray textureArray = new Texture2DArray(512, 512, count, TextureFormat.RGBA32, false);

        // 更新贴图和配置
        for (int i = 0; i < count; i++)
        {
            var config = textureConfigs[i];
            
            // 设置贴图
            // material.SetTexture($"_Textures{i}", config.texture);
            
            // 填充数组
            // textures[i] = config.texture;
            textureArray.SetPixels(config.texture.GetPixels(), i);
            positions[i] = new Vector4(config.position.x, config.position.y, 0, 0);
            scales[i] = new Vector4(config.scale.x, config.scale.y, 0, 0);
            rotations[i] = config.rotation;
        }
        

        // 设置数组到着色器
        material.SetTexture("_Textures", textureArray);
        material.SetVectorArray("_Positions", positions);
        material.SetVectorArray("_Scales", scales);
        material.SetFloatArray("_Rotations", rotations);
        
        // 设置通用参数
        material.SetFloat("_BorderSize", borderSize);
        material.SetFloat("_OuterGapWidth", outerGapWidth);
    }

    // 添加新的贴图配置
    public void AddTextureConfig(Texture2D texture)
    {
        if (textureConfigs.Count >= MAX_TEXTURES)
        {
            Debug.LogWarning("已达到最大贴图数量限制");
            return;
        }

        var config = new TextureConfig
        {
            texture = texture,
            position = new Vector2(Random.Range(0.2f, 0.8f), Random.Range(0.2f, 0.8f)),
            scale = new Vector2(0.4f, 0.4f),
            rotation = 0f
        };

        textureConfigs.Add(config);
    }

    // 移除贴图配置
    public void RemoveTextureConfig(int index)
    {
        if (index >= 0 && index < textureConfigs.Count)
        {
            textureConfigs.RemoveAt(index);
        }
    }
}