using System;
using UnityEngine;

public static class VisualSpriteResolver
{
    private const string MapResourcePath = "DataAssets/VisualSpriteVariantMap";

    private static VisualSpriteVariantMapAsset _map;
    private static VisualTheme _currentTheme = VisualTheme.Default;

    public static event Action<VisualTheme> ThemeChanged;

    public static VisualTheme CurrentTheme => _currentTheme;

    public static bool IsEyeComfort => _currentTheme == VisualTheme.EyeComfort;

    public static void SetTheme(VisualTheme theme)
    {
        if (_currentTheme == theme)
            return;

        _currentTheme = theme;
        ThemeChanged?.Invoke(_currentTheme);
    }

    public static Sprite Resolve(Sprite source)
    {
        if (source == null || _currentTheme == VisualTheme.Default)
            return source;

        EnsureMapLoaded();
        return _map != null ? _map.Resolve(source, _currentTheme) : source;
    }

    public static void ReloadMap()
    {
        _map = null;
        EnsureMapLoaded();
    }

    private static void EnsureMapLoaded()
    {
        if (_map != null)
            return;

        _map = TH1Resource.ResourceLoader.Load<VisualSpriteVariantMapAsset>(MapResourcePath);
        _map?.RebuildCache();
    }
}