<?php
/**
 * @package   FOF
 * @copyright Copyright (c)2010-2021 Nicholas K. Dionysopoulos / Akeeba Ltd
 * @license   GNU General Public License version 2, or later
 */

namespace FOF30\Render;

defined('_JEXEC') || die;

use FOF30\Container\Container;
use Joomla\Registry\Registry;
use LogicException;
use stdClass;

/**
 * Base class for other render classes
 *
 * @package FOF30\Render
 * @since   3.0.0
 */
abstract class RenderBase implements RenderInterface
{
	/** @var   Container|null  The container we are attached to */
	protected $container = null;

	/** @var   bool  Is this renderer available under this execution environment? */
	protected $enabled = false;

	/** @var   int  The priority of this renderer in case we have multiple available ones */
	protected $priority = 0;

	/** @var   Registry  A registry object holding renderer options */
	protected $optionsRegistry = null;

	/**
	 * Public constructor. Determines the priority of this class and if it should be enabled
	 */
	public function __construct(Container $container)
	{
		$this->container = $container;

		$this->optionsRegistry = new Registry();
	}

	/**
	 * Set a renderer option (depends on the renderer)
	 *
	 * @param   string  $key    The name of the option to set
	 * @param   mixed   $value  The value of the option
	 *
	 * @return  void
	 */
	function setOption(string $key, $value = null): void
	{
		$this->optionsRegistry->set($key, $value);
	}

	/**
	 * Set multiple renderer options at once (depends on the renderer)
	 *
	 * @param   array  $options  The options to set as key => value pairs
	 *
	 * @return  void
	 */
	function setOptions(array $options): void
	{
		foreach ($options as $key => $value)
		{
			$this->setOption($key, $value);
		}
	}

	/**
	 * Get the value of a renderer option
	 *
	 * @param   string  $key      The name of the parameter
	 * @param   mixed   $default  The default value to return if the parameter is not set
	 *
	 * @return  mixed  The parameter value
	 */
	function getOption(string $key, $default = null)
	{
		return $this->optionsRegistry->get($key, $default);
	}

	/**
	 * Returns the information about this renderer
	 *
	 * @return  stdClass
	 */
	function getInformation(): stdClass
	{
		$classParts = explode('\\', get_class($this));

		return (object) [
			'enabled'  => $this->enabled,
			'priority' => $this->priority,
			'name'     => strtolower(array_pop($classParts)),
		];
	}

	/**
	 * Echoes any HTML to show before the view template
	 *
	 * @param   string  $view  The current view
	 * @param   string  $task  The current task
	 *
	 * @return  void
	 */
	function preRender(string $view, string $task): void
	{
		$this->loadCustomCss();
	}

	/**
	 * Echoes any HTML to show after the view template
	 *
	 * @param   string  $view  The current view
	 * @param   string  $task  The current task
	 *
	 * @return  void
	 */
	function postRender(string $view, string $task): void
	{
	}

	/**
	 * Renders the submenu (link bar) for a category view when it is used in a
	 * extension
	 *
	 * Note: this function has to be called from the addSubmenu function in
	 *         the ExtensionNameHelper class located in
	 *         administrator/components/com_ExtensionName/helpers/Extensionname.php
	 *
	 * @return  void
	 */
	function renderCategoryLinkbar(): void
	{
		throw new LogicException(sprintf('Renderer class %s must implement the %s method', get_class($this), __METHOD__));
	}

	/**
	 * Opens a wrapper DIV. Our component's output will be inside this wrapper.
	 *
	 * @param   array  $classes  An array of additional CSS classes to add to the outer page wrapper element.
	 *
	 * @return  void
	 */
	protected function openPageWrapper(array $classes): void
	{
		$removeClasses = $this->getOption('remove_wrapper_classes', []);

		if (!is_array($removeClasses))
		{
			$removeClasses = explode(',', $removeClasses);
		}

		$removeClasses = array_map('trim', $removeClasses);

		foreach ($removeClasses as $class)
		{
			$x = array_search($class, $classes);

			if ($x !== false)
			{
				unset($classes[$x]);
			}
		}

		// Add the following classes to the wrapper div
		$addClasses = $this->getOption('add_wrapper_classes', '');

		if (!is_array($addClasses))
		{
			$addClasses = explode(',', $addClasses);
		}

		$addClasses    = array_map('trim', $addClasses);
		$customClasses = implode(' ', array_unique(array_merge($classes, $addClasses)));

		$id = $this->getOption('wrapper_id', null);
		$id = empty($id) ? "" : sprintf(' id="%s"', $id);

		echo <<< HTML
<div class="$customClasses"$id>

HTML;
	}

	/**
	 * Outputs HTML which closes the page wrappers opened with openPageWrapper.
	 *
	 * @return  void
	 */
	protected function closePageWrapper(): void
	{
		echo "</div>\n";
	}

	/**
	 * Loads the custom CSS files defined in the custom_css renderer option.
	 */
	protected function loadCustomCss()
	{
		$custom_css_raw = $this->getOption('custom_css', '');
		$custom_css_raw = trim($custom_css_raw);

		if (empty($custom_css_raw))
		{
			return;
		}

		$files        = explode(',', $custom_css_raw);
		$mediaVersion = $this->container->mediaVersion;

		foreach ($files as $file)
		{
			$file = trim($file);

			if (empty($file))
			{
				continue;
			}

			$this->container->template->addCSS($file, $mediaVersion);
		}
	}
}