<?php

class gausMethod{

	protected $columns ; // koloni, ravni na broq na neizvestni
	protected $rows ;  // redove, ravni na broi uravneniq
	protected $aDeterminanta; // matricata
	protected $values = array();
/*
rows = broi uravneniq
columns = broi neizvestni
 na4in na upotreba: Pyrvite 2 sa redove neizcestni, sled tova se izbroqvat stoinostite pred neizvestnite. red po red.
*/


	public function __construct($rows,$columns){
		$temp = func_get_args();
		$this->rows = $temp[0]; //broi uravneniq
		array_shift(&$temp);
		$this->columns = $temp[0]; //broi neizvestni
		array_shift(&$temp);
		$v = 0;
		for ($i = 0; $i < $this->rows ; $i++) {
			for ($j = 0; $j < $this->columns ; $j++) {
				$aDeterminanta[$i][$j] = $temp[$v];
				$v++;
			}
		}
		$this->convertToTriangularType();
		$this->calculateMatrix();
	}

	public function getMat(){
		return $this->aDeterminanta;
	}



	public function convertToTriangularType(){
		for ($j = 0;$j < $this->columns ;$j++){
			$temp = $this->aDeterminanta[$j][$j];
			for ($i=$j + 1;$i < $this->rows ;$i++){
				$temp2 = $this->aDeterminanta[$i][$j] / -$temp;
				$mRow = $this->muliplyRow($i,$temp2);
				$aRow = $this->addRow($mRow,$i);
				$this->updateRow($i,$aRow);
			}
		}
		for ($j = $this->columns - 1;$j > -1 ;$j--){
			$temp = $this->aDeterminanta[$j][$j];
			for ($i=$j - 1;$i > -1;$i--){
				$temp2 = $this->aDeterminanta[$i][$j] / -$temp;
				$mRow = $this->muliplyRow($i,$temp2);
				$aRow = $this->addRow($mRow,$i);
				$this->updateRow($i,$aRow);
			}
		}
	}

	//iz4islqvane na matricata
	public function calculateMatrix(){
		for ($i=0;$i<$this->rows;$i++){
			$temp = $this->aDeterminanta[$i][$this->columns];
			echo "Neizvestna $i e $temp";
		}
	}


	/*@Function@ multiplyRow @@
	 *
	 * Action:
	 * 	Multiply's a row by a number
	 * Return:
	 * 	Row multiplied by number
	 * Arguments:
	 * 	$rowToMultiply: Koi red da se umnoji
	 * 	$amountToMultiplyBy: S kolko da go umnoji
	 *
	 * @@End@@*/
	private function muliplyRow($rowToMultiply,$amountToMultiplyBy){
		$temp = $this->aDeterminanta[$rowToMultiply];
		for ($i = 0; $i < $this->columns; $i++) {
			$temp[$i] = $temp[$i] * $amountToMultiplyBy;
		}
		return $temp;
	}

	private function addRow($rowToAdd,$rowToAddTo){
		$temp = $this->aDeterminanta[$rowToAddTo];
		for ($i = 0;$i <$this->columns;$i++){
			$temp[$i] = $temp[$i] + $rowToAdd[$i];
		}
		return $temp;
	}

	private function updateRow($rowToUpdate,$newRow){
		$this->aDeterminanta[$rowToUpdate] = $newRow;
	}


	private function switchRows($nRowToSwith,$nRowToSwitchWith){
		if($nRowToSwith > $this->rows || $nRowToSwitchWith > $this->rows){
			Throw new Exception('Invalid aruments in switchRows function');
		}
		$temp = $this->aDeterminanta[$nRowToSwitchWith];
		$this->aDeterminanta[$nRowToSwitchWith] = $this->aDeterminanta[$nRowToSwith];
		$this->aDeterminanta[$nRowToSwith] = $temp;
	}

	private function AnalyzeFirstRow(){ //Analizirane na 1-iq stylb v tyrsene na 1-ca, razmnqne na redove.
		if ($this->aDeterminanta[0][0] == 1) { //ako pyrvoto 4islo e 1, spira funkciqta
			return;
		}
		for ($i = 1; $i < $this->rows; $i++) {
			if ($this->aDeterminanta[i][0] == 1) {
				$this->switchRows($this->aDeterminanta[i],$this->aDeterminanta[0]);
				break;
			}
		}
	}


}

$a = new gausMethod(1,1,1,1,1,1);

?>