//
// Mono.Math.Prime.Generator.PrimeGeneratorBase.cs - Abstract Prime Generator
//
// Authors:
//	Ben Maurer
//
// Copyright (c) 2003 Ben Maurer. All rights reserved
//

using System;

namespace Mono.Math.Prime.Generator {

	[CLSCompliant(false)]
#if INSIDE_CORLIB
	internal
#else
	public
#endif
	abstract class PrimeGeneratorBase {

		public virtual ConfidenceFactor Confidence {
			get {
#if DEBUG
				return ConfidenceFactor.ExtraLow;
#else
				return ConfidenceFactor.Medium;
#endif
			}
		}

		public virtual Prime.PrimalityTest PrimalityTest {
			get {
				return new Prime.PrimalityTest (PrimalityTests.SmallPrimeSppTest);
			}
		}

		public virtual int TrialDivisionBounds {
			get { return 4000; }
		}

		/// <summary>
		/// Performs primality tests on bi, assumes trial division has been done.
		/// </summary>
		/// <param name="bi">A BigInteger that has been subjected to and passed trial division</param>
		/// <returns>False if bi is composite, true if it may be prime.</returns>
		/// <remarks>The speed of this method is dependent on Confidence</remarks>
		protected bool PostTrialDivisionTests (BigInteger bi)
		{
			return PrimalityTest (bi, this.Confidence);
		}

		public abstract BigInteger GenerateNewPrime (int bits);
	}
}