<?php

namespace AaltoEdge\Modules\Header\Lib;

/**
 * Class that acts like interface for all header types
 *
 * Class HeaderType
 */
abstract class HeaderType {
	/**
	 * Value of option in database.
	 * For example, if your header type has value in select field of 'header-type1'
	 * that would be the value of this field
	 *
	 * @var
	 */
	protected $slug;
	/**
	 * Name of module so we don't repeat it where we need it
	 *
	 * @var string
	 */
	protected $moduleName = 'header';
	
	/**
	 * Loads template for header type
	 *
	 * @param array $parameters associative array of variables to pass to template
	 */
	public abstract function loadTemplate( $parameters = array() );
	
	/**
	 * Set header height properties
	 *
	 * @return mixed
	 */
	public abstract function setHeaderHeightProps();
	
	/**
	 * Returns total height of transparent parts of header
	 *
	 * @return mixed
	 */
	public abstract function calculateHeightOfTransparency();
	
	/**
	 * Returns height of header parts that are totaly transparent
	 *
	 * @return mixed
	 */
	public abstract function calculateHeightOfCompleteTransparency();
	
	/**
	 * Returns header height
	 *
	 * @return mixed
	 */
	public abstract function calculateHeaderHeight();
	
	/**
	 * Returns global variables that are used in JS
	 *
	 * @param $globalVariables
	 *
	 * @return mixed
	 */
	public abstract function getGlobalJSVariables( $globalVariables );
	
	/**
	 * Returns per page variables that are used in JS
	 *
	 * @param $perPafeVars
	 *
	 * @return mixed
	 */
	public abstract function getPerPageJSVariables( $perPafeVars );
	
	/**
	 * Returns configuration array for connecting header with other modules
	 *
	 * @return array
	 */
	public function getConnectConfig() {
		return array(
			'affect_content' => true,
			'affect_title'   => true,
			'affect_slider'  => true
		);
	}
	
	/**
	 * Getter for height of transparency property
	 *
	 * @return mixed
	 */
	public function getHeightOfTransparency() {
		if ( isset( $this->heightOfTransparency ) ) {
			return $this->heightOfTransparency;
		}
		
		return $this->calculateHeightOfTransparency();
	}
	
	/**
	 * Getter for height of complete transparency property
	 *
	 * @return mixed
	 */
	public function getHeightOfCompleteTransparency() {
		if ( isset( $this->heightOfCompleteTransparency ) ) {
			return $this->heightOfCompleteTransparency;
		}
		
		return $this->calculateHeightOfCompleteTransparency();
	}
	
	/**
	 * Getter for header height property
	 *
	 * @return mixed
	 */
	public function getHeaderHeight() {
		if ( isset( $this->headerHeight ) ) {
			return $this->headerHeight;
		}
		
		return $this->calculateHeaderHeight();
	}
}