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using MathNet.Numerics.LinearAlgebra.Complex;
using MathNet.Numerics.LinearAlgebra.Storage;

namespace MathNet.Numerics.UnitTests.LinearAlgebraTests.Complex
{
    using Complex = System.Numerics.Complex;

    /// <summary>
    /// User-defined vector implementation (internal class for testing purposes)
    /// </summary>
    internal class UserDefinedVector : Vector
    {
        class UserDefinedVectorStorage : VectorStorage<Complex>
        {
            public readonly Complex[] Data;

            public UserDefinedVectorStorage(int size)
                : base(size)
            {
                Data = new Complex[size];
            }

            public UserDefinedVectorStorage(int size, Complex[] data)
                : base(size)
            {
                Data = data;
            }

            public override bool IsDense
            {
                get { return true; }
            }

            public override Complex At(int index)
            {
                return Data[index];
            }

            public override void At(int index, Complex value)
            {
                Data[index] = value;
            }
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="UserDefinedVector"/> class with a given size.
        /// </summary>
        /// <param name="size">The size of the vector.</param>
        public UserDefinedVector(int size)
            : base(new UserDefinedVectorStorage(size))
        {
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="UserDefinedVector"/> class for an array.
        /// </summary>
        /// <param name="data">The array to create this vector from.</param>
        public UserDefinedVector(Complex[] data)
            : base(new UserDefinedVectorStorage(data.Length, (Complex[])data.Clone()))
        {
        }
    }
}
