using System;

public static class RandomHelper
{
    // Single Random instance for the whole app
    private static readonly Random _rand = new Random();

    // Random integer [min, max] inclusive
    public static int Int(int min, int max)
    {
        return _rand.Next(min, max + 1); // max is inclusive
    }

    // Random float [min, max)
    public static float Float(float min, float max)
    {
        return (float)(_rand.NextDouble() * (max - min) + min);
    }

    // Random double [min, max)
    public static double Double(double min, double max)
    {
        return _rand.NextDouble() * (max - min) + min;
    }

    // Random element from an array
    public static T Choice<T>(T[] array)
    {
        if (array == null || array.Length == 0)
            throw new ArgumentException("Array cannot be null or empty.");
        return array[_rand.Next(array.Length)];
    }

    // Random enum value
    public static T ChoiceEnum<T>() where T : Enum
    {
        Array values = Enum.GetValues(typeof(T));   // returns System.Array
        return (T)values.GetValue(_rand.Next(values.Length)); // use GetValue
    }
}