<?php

namespace TablePress\Matrix;

use TablePress\Matrix\Operators\Addition;
use TablePress\Matrix\Operators\DirectSum;
use TablePress\Matrix\Operators\Division;
use TablePress\Matrix\Operators\Multiplication;
use TablePress\Matrix\Operators\Subtraction;

class Operations
{
	public static function add(...$matrixValues): Matrix
	{
		if (count($matrixValues) < 2) {
			throw new Exception('Addition operation requires at least 2 arguments');
		}

		$matrix = array_shift($matrixValues);

		if (is_array($matrix)) {
			$matrix = new Matrix($matrix);
		}
		if (!$matrix instanceof Matrix) {
			throw new Exception('Addition arguments must be Matrix or array');
		}

		$result = new Addition($matrix);

		foreach ($matrixValues as $matrix) {
			$result->execute($matrix);
		}

		return $result->result();
	}

	public static function directsum(...$matrixValues): Matrix
	{
		if (count($matrixValues) < 2) {
			throw new Exception('DirectSum operation requires at least 2 arguments');
		}

		$matrix = array_shift($matrixValues);

		if (is_array($matrix)) {
			$matrix = new Matrix($matrix);
		}
		if (!$matrix instanceof Matrix) {
			throw new Exception('DirectSum arguments must be Matrix or array');
		}

		$result = new DirectSum($matrix);

		foreach ($matrixValues as $matrix) {
			$result->execute($matrix);
		}

		return $result->result();
	}

	public static function divideby(...$matrixValues): Matrix
	{
		if (count($matrixValues) < 2) {
			throw new Exception('Division operation requires at least 2 arguments');
		}

		$matrix = array_shift($matrixValues);

		if (is_array($matrix)) {
			$matrix = new Matrix($matrix);
		}
		if (!$matrix instanceof Matrix) {
			throw new Exception('Division arguments must be Matrix or array');
		}

		$result = new Division($matrix);

		foreach ($matrixValues as $matrix) {
			$result->execute($matrix);
		}

		return $result->result();
	}

	public static function divideinto(...$matrixValues): Matrix
	{
		if (count($matrixValues) < 2) {
			throw new Exception('Division operation requires at least 2 arguments');
		}

		$matrix = array_pop($matrixValues);
		$matrixValues = array_reverse($matrixValues);

		if (is_array($matrix)) {
			$matrix = new Matrix($matrix);
		}
		if (!$matrix instanceof Matrix) {
			throw new Exception('Division arguments must be Matrix or array');
		}

		$result = new Division($matrix);

		foreach ($matrixValues as $matrix) {
			$result->execute($matrix);
		}

		return $result->result();
	}

	public static function multiply(...$matrixValues): Matrix
	{
		if (count($matrixValues) < 2) {
			throw new Exception('Multiplication operation requires at least 2 arguments');
		}

		$matrix = array_shift($matrixValues);

		if (is_array($matrix)) {
			$matrix = new Matrix($matrix);
		}
		if (!$matrix instanceof Matrix) {
			throw new Exception('Multiplication arguments must be Matrix or array');
		}

		$result = new Multiplication($matrix);

		foreach ($matrixValues as $matrix) {
			$result->execute($matrix);
		}

		return $result->result();
	}

	public static function subtract(...$matrixValues): Matrix
	{
		if (count($matrixValues) < 2) {
			throw new Exception('Subtraction operation requires at least 2 arguments');
		}

		$matrix = array_shift($matrixValues);

		if (is_array($matrix)) {
			$matrix = new Matrix($matrix);
		}
		if (!$matrix instanceof Matrix) {
			throw new Exception('Subtraction arguments must be Matrix or array');
		}

		$result = new Subtraction($matrix);

		foreach ($matrixValues as $matrix) {
			$result->execute($matrix);
		}

		return $result->result();
	}
}
