using System.Runtime.InteropServices;
using UnityEngine;

public class VideoJSBridge : MonoBehaviour
{
#if UNITY_WEBGL && !UNITY_EDITOR
    [DllImport("__Internal")] static extern void HOY_VideoCreate(int id, string url);
    [DllImport("__Internal")] static extern void HOY_VideoDestroy(int id);
    [DllImport("__Internal")] static extern bool HOY_VideoReady(int id);
    [DllImport("__Internal")] static extern int  HOY_VideoWidth(int id);
    [DllImport("__Internal")] static extern int  HOY_VideoHeight(int id);
    [DllImport("__Internal")] static extern void HOY_VideoUpdateTexture(int id, int unityTextureId);
#else
    static void HOY_VideoCreate(int id, string url) {}
    static void HOY_VideoDestroy(int id) {}
    static bool HOY_VideoReady(int id) => false;
    static int  HOY_VideoWidth(int id)  => 0;
    static int  HOY_VideoHeight(int id) => 0;
    static void HOY_VideoUpdateTexture(int id, int tid) {}
#endif

    int _id; Renderer _r; Texture2D _tex; bool _ready, _init;

    public void Initialise(string url, Renderer r, int id)
    {
        _id = id; _r = r;
        HOY_VideoCreate(_id, url);
        _init = true;
    }

    void Update()
    {
        if (!_init) return;
        if (!_ready)
        {
            if (!HOY_VideoReady(_id)) return;
            int w = HOY_VideoWidth(_id), h = HOY_VideoHeight(_id);
            if (w <= 0 || h <= 0) return;
            _tex = new Texture2D(w, h, TextureFormat.RGBA32, false);
            _tex.wrapMode = TextureWrapMode.Clamp;
            if (_r != null) { _r.material = new Material(_r.sharedMaterial); _r.material.mainTexture = _tex; }
            _ready = true;
        }
        if (_tex != null) HOY_VideoUpdateTexture(_id, (int)_tex.GetNativeTexturePtr());
    }

    void OnDestroy()
    {
        if (_init) HOY_VideoDestroy(_id);
        if (_tex != null) Destroy(_tex);
    }
}