using System;
using System.Reflection;
using System.Resources;
using MelonLoader;
using UnityEngine;

namespace ADOFAIRenderer.Util;

internal static class BundleLoader
{
    private static readonly string BundlePlatform;
    private static readonly Assembly? ExecutingAssembly;

    static BundleLoader()
    {
        BundlePlatform = Application.platform switch
        {
            RuntimePlatform.WindowsPlayer => "Win64",
            RuntimePlatform.OSXPlayer => "OSX",
            _ => "Linux"
        };
        ExecutingAssembly = Assembly.GetExecutingAssembly();
    }

    public static AssetBundle GetBundle(string resourcePath)
    {
        if (ExecutingAssembly != null)
        {
            var bundlePath = $"ADOFAIRenderer.Bundle.{BundlePlatform}.{resourcePath}";
            using var resourceStream = ExecutingAssembly.GetManifestResourceStream(bundlePath);
            if (resourceStream != null)
            {
                return AssetBundle.LoadFromStream(resourceStream);
            }
                
            Melon<RenderMod>.Logger.Error($"Could not find bundle resource in DLL.\n{bundlePath}");
            throw new MissingManifestResourceException("Could not find bundle resource in DLL.");
        }
            
        Melon<RenderMod>.Logger.Error("Executing assembly has not been set properly.");
        throw new InvalidOperationException("ExecutingAssembly has not been set."); 
    }
}