using UnityEngine;
using System.Collections.Generic;
using System;
using System.Runtime.InteropServices;

public class TiledTextureReceiver : MonoBehaviour
{
    public Material targetMaterial; // 目标材质

    // [DllImport("__Internal")]
    // private static extern void DisableKeyboardInput();

    void Start()
    {
        if (targetMaterial == null)
        {
            Debug.LogError("请设置目标材质！");
            return;
        }
        // DisableKeyboardInput();
    }

    public void ReceiveTiledTextureInfo(string jsonString)
    {
        Debug.Log("Received: " + jsonString);
        try
        {
            TiledTextureInfo info = JsonUtility.FromJson<TiledTextureInfo>(jsonString);
            GenerateTiledTexture(info);
        }
        catch (Exception e)
        {
            Debug.LogError("Error parsing JSON: " + e.Message);
        }
    }

    void GenerateTiledTexture(TiledTextureInfo info)
    {
        List<Texture2D> tileTextures = new List<Texture2D>();
        foreach (string base64String in info.tileBase64Strings)
        {
            byte[] bytes = Convert.FromBase64String(base64String);
            Texture2D texture = new Texture2D(2, 2); // 创建一个临时纹理
            texture.LoadImage(bytes);
            tileTextures.Add(texture);
        }

        if (tileTextures.Count == 0)
        {
            Debug.LogError("No tile textures received.");
            return;
        }

        int tileWidth = tileTextures[0].width;
        int tileHeight = tileTextures[0].height;
        int targetWidth = tileWidth * info.tileCols;
        int targetHeight = tileHeight * info.tileRows;

        Texture2D targetTexture = new Texture2D(targetWidth, targetHeight);

        for (int row = 0; row < info.tileRows; row++)
        {
            for (int col = 0; col < info.tileCols; col++)
            {
                int x = col * tileWidth;
                int y = row * tileHeight;
                Texture2D currentTile = tileTextures[(row * info.tileCols + col) % tileTextures.Count];

                for (int i = 0; i < tileWidth; i++)
                {
                    for (int j = 0; j < tileHeight; j++)
                    {
                        targetTexture.SetPixel(x + i, y + j, currentTile.GetPixel(i, j));
                    }
                }
            }
        }

        targetTexture.Apply();
        targetMaterial.mainTexture = targetTexture;

        // 清理临时纹理
        foreach (var texture in tileTextures)
        {
            Destroy(texture);
        }
    }
}

[Serializable]
public class TiledTextureInfo
{
    public List<string> tileBase64Strings;
    public int tileRows;
    public int tileCols;
}