#include <stdlib.h>

#include <string.h>
#include "matrix.h"

// TODO Matrix-Funktionen implementieren

Matrix createMatrix(unsigned int rows, unsigned int cols)
{
  Matrix matrix;
  matrix.rows = rows;
  matrix.cols = cols;
  matrix.data = (float *)malloc(rows * cols * sizeof(MatrixType));
  if (matrix.data != NULL) {

  }
  return matrix;
}

void clearMatrix(Matrix *matrix)
{
  if (matrix->data != NULL) {
      free(matrix->data);
    matrix->data = NULL;

  }

  }

void setMatrixAt(MatrixType value, Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
{
    
}

MatrixType getMatrixAt(const Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
{
    if(rowIdx > matrix.rows || colIdx > matrix.cols){
      return 0;
      }
    MatrixType value;
    value = matrix.data[rowIdx * matrix.cols + colIdx];
    return value;
}

Matrix add(const Matrix matrix1, const Matrix matrix2)
{
    
}

Matrix multiply(const Matrix matrix1, const Matrix matrix2)
{
    if (matrix1.cols != matrix2.rows){
      Matrix errorMatrix = createMatrix(0, 0);
      errorMatrix.data = NULL;
      return errorMatrix;
      }
    Matrix matrix3 = createMatrix(matrix1.rows, matrix2.cols);

    for( size_t i = 0; i < matrix1.rows; i++){
      for(size_t j = 0; j < matrix2.cols; j++){
        MatrixType sum = 0;
        for(size_t k = 0; k < matrix1.cols; k++){
          sum += getMatrixAt(matrix1, i, k) * getMatrixAt(matrix2, k, j);
        }
        setMatrixAt(sum, matrix3, i, j);
      }
    }

    return matrix3;
}