using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Globalization;
using System.IO;
using System.Security.Cryptography;
using System.Threading;
using Questionable.Model.Gathering;
using Questionable.Model.IO;

namespace Questionable.GatheringPaths;

internal static class AssemblyGatheringLocationLoader
{
	private static readonly Lazy<IReadOnlyDictionary<ushort, GatheringRoot>> Locations = new Lazy<IReadOnlyDictionary<ushort, GatheringRoot>>(LoadLocations, LazyThreadSafetyMode.ExecutionAndPublication);

	internal static TimeSpan? DecodeDuration { get; private set; }

	internal static Stream GatheringSchema => typeof(AssemblyGatheringLocationLoader).Assembly.GetManifestResourceStream("Questionable.GatheringPaths.GatheringLocationSchema");

	internal static IReadOnlyDictionary<ushort, GatheringRoot> GetLocations()
	{
		return Locations.Value;
	}

	private static IReadOnlyDictionary<ushort, GatheringRoot> LoadLocations()
	{
		Stopwatch stopwatch = Stopwatch.StartNew();
		using Stream stream = typeof(AssemblyGatheringLocationLoader).Assembly.GetManifestResourceStream("Questionable.GatheringPaths.GatheringBundle");
		byte[] array = PathBundleSecret.Key();
		List<KeyValuePair<string, GatheringRoot>> list = PathBundle.Deserialize<GatheringRoot>(stream, array);
		CryptographicOperations.ZeroMemory(array);
		Dictionary<ushort, GatheringRoot> dictionary = new Dictionary<ushort, GatheringRoot>(list.Count);
		foreach (var (s, value) in list)
		{
			dictionary[ushort.Parse(s, CultureInfo.InvariantCulture)] = value;
		}
		DecodeDuration = stopwatch.Elapsed;
		return dictionary;
	}
}