import java.util.ArrayList;
import java.util.List;
import java.util.Random;


public class Matrix
{
    int lines;
    int columns;
    List<Integer> values = new ArrayList<Integer>();

    public int getCountElements()
    {
        return lines * columns;
    }

    public int getLines()
    {
        return lines;
    }

    public int getColumns()
    {
        return columns;
    }

    public void initZeroMatrix()
    {
        int elements = getCountElements();
        for (int i = 0; i<elements; i++)
        {
            values.add(0);
        }
    }

    public void creatRandomValues()
    {
        Random rnd = new Random();
        for (int i = 0;i < values.size(); i++)
        {
            values.set(i, rnd.nextInt(20));
        }

    }

    public boolean isSquare()
    {
        if (this.lines == this.columns)
            return true;
        else
            return false;
    }


    Matrix(int lines, int columns)
    {
        this.lines = lines;
        this.columns = columns;
        initZeroMatrix();
        System.out.println("Создана матрица с " + lines + " строк и с " + columns + " столбцов.");
        System.out.println("");
    }

    public int getValuesElement(int index)
    {
        return values.get(index);
    }

    public void addVariablesForElement(int index, int add)
    {
        this.values.set(index, this.values.get(index) + add);
    }

    public void addVariablesForIndex(String index, int add)
    {
        int place = getElement(index, false);
        this.values.set(place, this.values.get(place) + add);
    }

    public void setVariablesForElement(int index, int value)
    {
        this.values.set(index, value);
    }

    public void setVariablesForIndex(String index, int value)
    {
        int place = getElement(index, false);
        this.values.set(place, value);
    }

    public int getElementIndex(String index)
    {
        return getElement(index, false);
    }

    public int getElementValue(String index)
    {
        return getElement(index, true);
    }

    public int getElement(String index, boolean valuesB)
    {
        String[] values = index.split(",");
        int line = Integer.parseInt(values[0]);
        int columns = Integer.parseInt(values[1]);

        int indexEl = line * this.columns - (this.columns - columns) - 1;

        if (valuesB)
            return this.values.get(indexEl);
        else
            return indexEl;
    }

    public String getIndexElement(int number)
    {
        int columns = 1;
        int line = 1;

        for (int i = 0; i<number; i++)
        {
            if (columns == lines)
            {
                line++;
                columns = 0;
            }
            columns++;
        }
        return (line + "," + columns);
    }



    public void showInfoMatrix()
    {
        System.out.println("");
        System.out.println("================================");
        if (isSquare())
        System.out.println("Матрица квадратна");
        System.out.println("Матрица состоит из " + lines + " строк.");
        System.out.println("Матрица состоит из " + columns + " столбцов.");
        System.out.println("================================");
        System.out.println("");

    }

    public void showMatrix()
    {
        int elements = getCountElements();
        int steps = 0;

        System.out.println("");
        for (int i = 0; i<elements; i++)
        {
            if (steps == 0)
                System.out.print(" || ");
            System.out.print(getValuesElement(i) + "(" + getIndexElement(i) + ") || ");
            steps++;

            if (steps == lines)
            {
                steps = 0;
                System.out.println("");
            }
        }
        System.out.println("");
    }


}