package com.mycompany.matrix;

import com.mycompany.summatrixexception.*;

import java.lang.String;
import java.lang.StringBuffer;

import mycompany.productmatrixexception.*;

    public class Matrix{
        protected int row  = 0;
        protected int column = 0;
        protected int array[][];

        public Matrix (int row, int column){

            if(row < 0 || column < 0) throw new  RuntimeException("Went beyond the matrix");
            this.row = row;
            this.column = column;

                if(row < 0 || column < 0) throw new  RuntimeException("Went beyond the matrix");
                   array = new int[row][];
                   for (int i = 0; i < row; i++){
                      array[i] = new int[column];
                   }
                   this.row = row;
                   this.column = column;
                   for (int i = 0; i<this.row; i++){
                      for (int j = 0; j<this.column; j++){
                      this.array[i][j] = 0 ;
                      }
                   }

        }

        public Matrix (){
        }

        public  Matrix sum (Matrix a){
            Matrix c = new Matrix(this.row, this.column);
            if ((this.row != a.row) ||(this.column != a.column)) throw new  SumMatrixException("Multiplication is impossible!");
            for (int i = 0; i<this.row; i++){
                for (int j = 0; j<this.column; j++){
                 c.setElement(i,j,this.getElement(i,j)+a.getElement(i,j));
                //  c.array[i][j] = this.array[i][j] + a.array[i][j];
                  System.out.println( c.getElement(i,j));
                }
            }
            return c;
         }
         public Matrix product(Matrix a){
             Matrix c = new Matrix(this.row, this.column);
             if (this.column != a.row) throw new  ProductMatrixException("Multiplication is impossible!");
             for(int i = 0; i < this.row; i++){
                 for(int j = 0; j < a.column; j++){
                    for(int k = 0; k < this.column; k++)
                    c.setElement(i,j,c.getElement(i,j)+this.getElement(i,k)*a.getElement(k,j));
                       //c.array[i][j] += (this.array[i][k] * a.array[k][j]);
                 }
              }
              return c;
        }



         public void setElement(int row, int column, int value){
             if((row < 0 || column < 0) && (row > this.row)||(column > this.row)) throw new  RuntimeException("Went beyond the matrix!");
         this.array[row][column] = value;
         }

         public int getElement(int row, int column){
         if((row < 0 || column < 0) && (row > this.row)||(column > this.row)) throw new  RuntimeException("Went beyond the matrix!");
             return array[row][column];
         }

         public String toString(){
             StringBuffer strBuffer = new StringBuffer();
             for(int i = 0; i < this.row; i++){
                 for(int j = 0; j < this.column; j++){
                 strBuffer.append(this.getElement(i,j));
                 strBuffer.append(" ");
                 }
             strBuffer.append("\n");
            }
            return strBuffer.toString();
         }

         public boolean equals ( Object o ) {
             if(this.hashCode() != o.hashCode())
                return false;
             if ( o instanceof Matrix ) {
                 Matrix a = (Matrix)o;
                 if ((this.row != a.row) ||(this.column != a.column) ) {
                     return false;
                 }
                 for (int i = 0; i<this.row; i++){
                       for (int j = 0; j<this.column; j++){
                         if (this.getElement(i,j) != a.getElement(i,j)){
                            return false;
                         }
                       }
                    }
                 return true;
             }
             else
                 return false;
         }
    }