package ru.kpfu.itis.group11402.batyrova.Task055;

import ru.kpfu.itis.group11402.batyrova.Task050.RationalFraction;
import ru.kpfu.itis.group11402.batyrova.Task053.RationalVector2D;

/**
 * @author Elvira Batyrova
 * 402
 * 055
 */
public class RationalMatrix2x2 {
    private RationalFraction[][]matrix = new RationalFraction[2][2];

    public RationalFraction[][] getMatrix() {
        return matrix;
    }

    public void setMatrix(RationalFraction[][] matrix) {
        this.matrix = matrix;
    }

    public RationalMatrix2x2() {
        this(new RationalFraction[][] {{new RationalFraction(),new RationalFraction()},{new RationalFraction(),new RationalFraction()}});
    }
    public RationalMatrix2x2(RationalFraction r) {
        this(new RationalFraction[][] {{r,r},{r,r}});
    }
    public RationalMatrix2x2(RationalFraction[][] matrix) {
        this.matrix = matrix;
    }
    public RationalMatrix2x2(RationalFraction a1, RationalFraction a2, RationalFraction a3, RationalFraction a4) {
        this(new RationalFraction[][] {{a1,a2},{a3,a4}});
    }
    public RationalMatrix2x2 add(RationalMatrix2x2 rmatr) {
        RationalMatrix2x2 result = new RationalMatrix2x2();
        for (int i = 0; i < 2; i++) {
            for (int j = 0; j < 2; j++) {
                result.matrix[i][j] = this.matrix[i][j].add(rmatr.getMatrix()[i][j]);
            }
        }
        return result;
    }
    public RationalMatrix2x2 mult(RationalMatrix2x2 rmatr) {
        RationalMatrix2x2 result = new RationalMatrix2x2();
        for (int i = 0; i < 2; i++) {
            for (int j = 0; j < 2; j++) {
                for (int k = 0; k < 2; k++) {
                    result.matrix[i][j].add2(this.matrix[i][k].mult(rmatr.getMatrix()[k][j]));
                }
            }
        }
        return result;
    }
    public RationalFraction det() {
        return matrix[0][0].mult(matrix[1][1]).sub(matrix[0][1].mult(matrix[1][0]));
    }
    public RationalVector2D multVector(RationalVector2D rvect) {
        return new RationalVector2D(this.matrix[0][0].mult(rvect.getX()).add(this.matrix[0][1].mult(rvect.getX())),
                this.matrix[1][0].mult(rvect.getY()).add(this.matrix[1][1].mult(rvect.getY())));
    }
    public String toString() {
        return (matrix[0][0].toString() + " " + matrix[0][1].toString() + "\n" + matrix[1][0].toString() + " " + matrix[1][1].toString() + "\n");
    }
}