using System.Collections;
using UnityEngine;
using UnityEngine.Networking;

/// <summary>
/// HOY Gallery V2 — ArtworkFrame
/// Handles image or video display on each frame quad.
/// Scale and position are applied by GalleryManager from Spatial coordinates.
/// The frame itself is always a simple quad at localScale=1; the parent
/// GameObject carries the Spatial scale.
/// </summary>
public class ArtworkFrame : MonoBehaviour
{
    [Header("References (set on prefab)")]
    public Renderer  artworkRenderer;
    public Transform labelAnchor;
    public GameObject labelPrefab;

    ArtworkData _data;

    public void Initialise(ArtworkData data)
    {
        _data = data;

        if (data.type == "video")
            StartCoroutine(LoadVideo());
        else
            StartCoroutine(LoadImage());

        SpawnLabel();
    }

    // ── Image ─────────────────────────────────────────────────────────────────
    IEnumerator LoadImage()
    {
        string url = GetStreamingURL(_data.file);
        using var req = UnityWebRequestTexture.GetTexture(url);
        yield return req.SendWebRequest();

        if (req.result != UnityWebRequest.Result.Success)
        {
            Debug.LogWarning($"[Frame] Image failed: {_data.file} — {req.error}");
            SetPlaceholder();
            yield break;
        }

        var tex = DownloadHandlerTexture.GetContent(req);
        tex.wrapMode = TextureWrapMode.Clamp;

        if (artworkRenderer != null)
        {
            artworkRenderer.material = new Material(artworkRenderer.sharedMaterial);
            artworkRenderer.material.mainTexture = tex;
        }
    }

    // ── Video ─────────────────────────────────────────────────────────────────
    IEnumerator LoadVideo()
    {
        string url = GetStreamingURL(_data.file);

#if UNITY_WEBGL && !UNITY_EDITOR
        if (artworkRenderer != null)
        {
            var bridge = gameObject.AddComponent<VideoJSBridge>();
            bridge.Initialise(url, artworkRenderer, Mathf.Abs(_data.spatialId.GetHashCode() % 10000));
        }
#else
        yield return StartCoroutine(LoadVideoEditor(url));
#endif
        yield return null;
    }

#if !UNITY_WEBGL || UNITY_EDITOR
    IEnumerator LoadVideoEditor(string url)
    {
        var vp = gameObject.AddComponent<UnityEngine.Video.VideoPlayer>();
        vp.url = url;
        vp.isLooping = true;
        vp.playOnAwake = false;
        vp.renderMode = UnityEngine.Video.VideoRenderMode.MaterialOverride;
        vp.targetMaterialRenderer = artworkRenderer;
        vp.targetMaterialProperty = "_MainTex";
        vp.audioOutputMode = UnityEngine.Video.VideoAudioOutputMode.None;
        vp.Prepare();
        float t = 8f;
        while (!vp.isPrepared && t > 0) { t -= Time.deltaTime; yield return null; }
        if (vp.isPrepared) vp.Play();
        else Debug.LogWarning($"[Frame] VideoPlayer timeout: {_data.file}");
    }
#endif

    void SetPlaceholder()
    {
        if (artworkRenderer == null) return;
        var m = new Material(artworkRenderer.sharedMaterial);
        m.color = new Color(0.12f, 0.12f, 0.15f);
        artworkRenderer.material = m;
    }

    void SpawnLabel()
    {
        if (labelPrefab == null || labelAnchor == null) return;
        var label = Instantiate(labelPrefab, labelAnchor.position, labelAnchor.rotation, labelAnchor);
        label.GetComponent<ArtworkLabel>()?.SetText(_data.title, _data.artist);
    }

    static string GetStreamingURL(string rel)
    {
#if UNITY_WEBGL && !UNITY_EDITOR
        return $"{Application.streamingAssetsPath}/{rel}";
#else
        return $"file://{Application.streamingAssetsPath}/{rel}";
#endif
    }
}