using UnityEngine;
using UnityEngine.Rendering;

namespace Vanguard.Board3D
{
    /// <summary>Плоские подписи на столе без TMP и Canvas.</summary>
    internal static class BoardText
    {
        private static Font _font;

        public static Font Font
        {
            get
            {
                if (_font != null)
                    return _font;

                _font = Resources.GetBuiltinResource<Font>("LegacyRuntime.ttf");
                if (_font == null)
                    _font = Resources.GetBuiltinResource<Font>("Arial.ttf");
                if (_font == null)
                    _font = Resources.GetBuiltinResource<Font>("Builtin-LegacyRuntime.ttf");
                return _font;
            }
        }

        public static TextMesh Create(
            Transform parent,
            string text,
            float characterSize,
            Color color,
            Vector3 localPosition,
            float yaw = 0f,
            TextAnchor anchor = TextAnchor.MiddleCenter)
        {
            var go = new GameObject("Board Label");
            go.transform.SetParent(parent, false);
            go.transform.localPosition = localPosition;
            // TextMesh по умолчанию смотрит в -Z; +90° по X кладёт его на стол.
            go.transform.localRotation = Quaternion.Euler(90f, yaw, 0f);

            var mesh = go.AddComponent<TextMesh>();
            mesh.font = Font;
            mesh.fontSize = 64;
            mesh.characterSize = characterSize;
            mesh.anchor = anchor;
            mesh.alignment = TextAlignment.Center;
            mesh.color = color;
            mesh.text = text;
            mesh.richText = false;

            var renderer = go.GetComponent<MeshRenderer>();
            if (mesh.font != null && mesh.font.material != null)
                renderer.sharedMaterial = mesh.font.material;
            renderer.shadowCastingMode = ShadowCastingMode.Off;
            renderer.receiveShadows = false;
            renderer.sortingOrder = 1;
            return mesh;
        }

        public static void SetText(TextMesh mesh, string text)
        {
            if (mesh != null)
                mesh.text = text ?? string.Empty;
        }

        public static void SetColor(TextMesh mesh, Color color)
        {
            if (mesh != null)
                mesh.color = color;
        }
    }
}