// <copyright file="VectorStorage.Validation.cs" company="Math.NET">
// Math.NET Numerics, part of the Math.NET Project
// http://numerics.mathdotnet.com
// http://github.com/mathnet/mathnet-numerics
//
// Copyright (c) 2009-2013 Math.NET
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
// </copyright>

using System;

namespace IStation.Numerics.LinearAlgebra.Storage
{
    // ReSharper disable UnusedParameter.Global
    public partial class VectorStorage<T>
    {
        void ValidateRange(int index)
        {
            if ((uint)index >= (uint)Length)
            {
                throw new ArgumentOutOfRangeException(nameof(index));
            }
        }

        void ValidateSubVectorRange(VectorStorage<T> target,
            int sourceIndex, int targetIndex, int count)
        {
            if (count < 1)
            {
                throw new ArgumentOutOfRangeException(nameof(count), "Value must be positive.");
            }

            // Verify Source

            if ((uint)sourceIndex >= (uint)Length)
            {
                throw new ArgumentOutOfRangeException(nameof(sourceIndex));
            }

            var sourceMax = sourceIndex + count;

            if (sourceMax > Length)
            {
                throw new ArgumentOutOfRangeException(nameof(count));
            }

            // Verify Target

            if ((uint)targetIndex >= (uint)target.Length)
            {
                throw new ArgumentOutOfRangeException(nameof(targetIndex));
            }

            var targetMax = targetIndex + count;

            if (targetMax > target.Length)
            {
                throw new ArgumentOutOfRangeException(nameof(count));
            }
        }

        void ValidateRowRange(MatrixStorage<T> target, int rowIndex)
        {
            if ((uint)rowIndex >= (uint)target.RowCount)
            {
                throw new ArgumentOutOfRangeException(nameof(rowIndex));
            }

            if (target.ColumnCount != Length)
            {
                throw new ArgumentException("Matrix row dimensions must agree.", nameof(target));
            }
        }

        void ValidateColumnRange(MatrixStorage<T> target, int columnIndex)
        {
            if ((uint)columnIndex >= (uint)target.ColumnCount)
            {
                throw new ArgumentOutOfRangeException(nameof(columnIndex));
            }

            if (target.RowCount != Length)
            {
                throw new ArgumentException("Matrix column dimensions must agree.", nameof(target));
            }
        }

        void ValidateSubRowRange(MatrixStorage<T> target, int rowIndex,
            int sourceColumnIndex, int targetColumnIndex, int columnCount)
        {
            if (columnCount < 1)
            {
                throw new ArgumentOutOfRangeException(nameof(columnCount), "Value must be positive.");
            }

            // Verify Source

            if ((uint)sourceColumnIndex >= (uint)Length)
            {
                throw new ArgumentOutOfRangeException(nameof(sourceColumnIndex));
            }

            if (sourceColumnIndex + columnCount > Length)
            {
                throw new ArgumentOutOfRangeException(nameof(columnCount));
            }

            // Verify Target

            if ((uint)rowIndex >= (uint)target.RowCount)
            {
                throw new ArgumentOutOfRangeException(nameof(rowIndex));
            }

            if ((uint)targetColumnIndex >= (uint)target.ColumnCount)
            {
                throw new ArgumentOutOfRangeException(nameof(targetColumnIndex));
            }

            if (targetColumnIndex + columnCount > target.ColumnCount)
            {
                throw new ArgumentOutOfRangeException(nameof(columnCount));
            }
        }

        void ValidateSubColumnRange(MatrixStorage<T> target, int columnIndex,
            int sourceRowIndex, int targetRowIndex, int rowCount)
        {
            if (rowCount < 1)
            {
                throw new ArgumentOutOfRangeException(nameof(rowCount), "Value must be positive.");
            }

            // Verify Source

            if ((uint)sourceRowIndex >= (uint)Length)
            {
                throw new ArgumentOutOfRangeException(nameof(sourceRowIndex));
            }

            if (sourceRowIndex + rowCount > Length)
            {
                throw new ArgumentOutOfRangeException(nameof(rowCount));
            }

            // Verify Target

            if ((uint)columnIndex >= (uint)target.ColumnCount)
            {
                throw new ArgumentOutOfRangeException(nameof(columnIndex));
            }

            if ((uint)targetRowIndex >= (uint)target.RowCount)
            {
                throw new ArgumentOutOfRangeException(nameof(targetRowIndex));
            }

            if (targetRowIndex + rowCount > target.RowCount)
            {
                throw new ArgumentOutOfRangeException(nameof(rowCount));
            }
        }
    }
    // ReSharper restore UnusedParameter.Global
}