using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using Random = System.Random;
using System.Runtime.Serialization.Formatters.Binary;
using UnityEngine;

namespace OHM.UnityToolkit
{
	public static class RandomExtensions
	{
		public static RandomState Save(Random random)
		{
			using (MemoryStream stream = new MemoryStream())
			{
				new BinaryFormatter().Serialize(stream, random);
				return new RandomState(stream.ToArray());
			}
		}

		public static Random Restore(RandomState state)
		{
			using (MemoryStream stream = new MemoryStream(state.State))
			{
				return (Random)new BinaryFormatter().Deserialize(stream);
			}
		}

		public static bool Bool(Random random)
		{
			return random.NextDouble() >= 0.5;
		}

		public static int MinMax(Random random, int n1, int n2)
		{
			if (n1 == n2)
			{
				return n1;
			}
			int lo = Mathf.Min(n1, n2);
			int hi = Mathf.Max(n1, n2);
			return lo + random.Next() % (hi - lo + 1);
		}

		public static int ListIndex(Random random, int listCount)
		{
			return MinMax(random, 0, listCount - 1);
		}

		public static int ListIndex(Random random, ICollection collection)
		{
			return ListIndex(random, collection.Count);
		}

		public static T ListElem<T>(Random random, List<T> list)
		{
			return default(T);
		}

		public static float MinMax(Random random, float min, float max)
		{
			return (float)((double)(max - min) * random.NextDouble() + (double)min);
		}

	}
}