using MatrixProject.Exceptions;
using System.Numerics;
using System.Reflection;

namespace MatrixProject.Test;

public class MatrixTest
{
    [InlineData(10)]
    [InlineData(5)]
    [InlineData(2)]
    [InlineData(3)]
    [Theory]
    public void CheckRowsBeforeInitMatrixWithRows(int size)
    {
        Matrix matrix = new Matrix(size);

        Assert.Equal(size, matrix.Rows);
        Assert.Equal(size, matrix.Columns);

    }

    [Fact]
    public void CheckColumnsBeforeInitMatrix()
    {
        Matrix matrix = new Matrix();

        Assert.Equal(5, matrix.Columns);
    }

    [Theory]
    [MemberData(nameof(testTwoDimArray))]
    public void CheckFillMatrixInDefaultConstructor(int row, int column, int fillNumber, double[,] testArray) {

        Matrix matrix = new Matrix(row, column, fillNumber);

        Assert.True(EqualsTwoDimArray(testArray, matrix));
    }
    [Theory]
    [MemberData(nameof(testMult))]
    public void CheckMultOnScalar(int row,
        int column,
        int fillNumber,
        int scalar,
        double[,] testArray)
    {

        Matrix matrix = new Matrix(row, column, fillNumber);
        matrix = matrix * scalar;
        Assert.True(EqualsTwoDimArray(testArray, matrix));
    }

    [Theory]
    [MemberData(nameof(testSum))]
    public void CheckSum(Matrix matrix, Matrix matrixTwo) {

        Assert.Throws<AdditionException>(() => matrix += matrixTwo);
    }

    public static TheoryData<int, int,int, double[,]> testTwoDimArray => new () {

         {2, 2, 3, new double[,] { { 3, 3 }, { 3, 3 } } },
         {2, 2, 3, new double[,] { { 3, 3 }, { 3, 3 } } },
         {2, 2, 3, new double[,] { { 3, 3 }, { 3, 3 } } },
         {2, 2, 3, new double[,] { { 3, 3 }, { 3, 3 } } },
         {2, 2, 3, new double[,] { { 3, 3 }, { 3, 3 } } }
    };
    public static TheoryData<int, int, int, int, double[,]> testMult => new() {

         {2, 2, 1, 4, new double[2,2]{ {4,4 }, {4,4} }}
    };
    public static TheoryData<Matrix, Matrix> testSum => new() {

         {new Matrix(4, 3), new Matrix(3, 4) }
    };
    private bool EqualsTwoDimArray(double[,] testMatrix, Matrix matrix) {
        if(testMatrix.GetLength(0) != matrix.Rows || 
            testMatrix.GetLength(1) != matrix.Columns) return false;
        for (int i = 0; i < matrix.Rows; i++)
        {
            for (int j = 0; j < matrix.Columns; j++)
            {
                if (testMatrix[i, j] != matrix[i, j]) return false;
            }
        }  
        return true;
    }
}