<?php

declare( strict_types = 1 );

namespace MediaWiki\Extension\Math\WikiTexVC\Nodes;

class Fun4 extends TexNode {

	/** @var string */
	protected $fname;
	/** @var TexNode */
	protected $arg1;
	/** @var TexNode */
	protected $arg2;
	/** @var TexNode */
	protected $arg3;
	/** @var TexNode */
	protected $arg4;

	public function __construct( string $fname,
								 TexNode $arg1,
								 TexNode $arg2,
								 TexNode $arg3,
								 TexNode $arg4 ) {
		parent::__construct( $fname, $arg1, $arg2, $arg3, $arg4 );
		$this->fname = $fname;
		$this->arg1 = $arg1;
		$this->arg2 = $arg2;
		$this->arg3 = $arg3;
		$this->arg4 = $arg4;
	}

	/**
	 * @return string
	 */
	public function getFname(): string {
		return $this->fname;
	}

	/**
	 * @return TexNode
	 */
	public function getArg1(): TexNode {
		return $this->arg1;
	}

	/**
	 * @return TexNode
	 */
	public function getArg2(): TexNode {
		return $this->arg2;
	}

	/**
	 * @return TexNode
	 */
	public function getArg3(): TexNode {
		return $this->arg3;
	}

	/**
	 * @return TexNode
	 */
	public function getArg4(): TexNode {
		return $this->arg4;
	}

	/** @inheritDoc */
	public function inCurlies() {
		return $this->render();
	}

	/** @inheritDoc */
	public function render() {
		return '{' . $this->fname . ' ' .
			$this->arg1->inCurlies() .
			$this->arg2->inCurlies() .
			$this->arg3->inCurlies() .
			$this->arg4->inCurlies() .
			'}';
	}

	/** @inheritDoc */
	public function renderMML( $arguments = [], &$state = [] ): string {
		return $this->parseToMML( $this->fname, $arguments, $state );
	}

	/** @inheritDoc */
	public function extractIdentifiers( $args = null ) {
		if ( $args == null ) {
			$args = [ $this->arg1, $this->arg2, $this->arg3, $this->arg4 ];
		}
		return parent::extractIdentifiers( $args );
	}

}