<?php

/**
 * Addconfig subpage base - makes sure
 * we have the two required methods preprocess and render
 */
abstract class AddConfig_Base
{

	/**
	 * Holds the instance for the currently executing step
	 * @var AddConfig_Base
	 */
	private static $instance = null;
	
	/**
	 * Config being edited (if any)
	 * @var ?ConfigTgz
	 */
	protected $edit = null;

	public static function setStep(string $step)
	{
		if (empty($step) || !class_exists($step) || get_parent_class($step) !== 'AddConfig_Base') {
			Message::addError('invalid-action', $step);
			Util::redirect('?do=SysConfig');
		}
		self::$instance = new $step();
		if (($editId = Request::any('edit', 0, 'int')) !== 0) {
			self::$instance->edit = ConfigTgz::get($editId);
			if (self::$instance->edit === null)
				ErrorHandler::traceError('Invalid config id for editing: ' . $editId);
			Util::addRedirectParam('edit', self::$instance->edit->id());
		}
	}

	/**
	 * Called before any HTML rendering happens, so you can
	 * prepare stuff, validate input, and optionally redirect
	 * early if something is wrong, or you received post
	 * data etc.
	 */
	protected function preprocessInternal()
	{
		// void
	}

	/**
	 * Do page rendering.
	 */
	protected function renderInternal()
	{
		// void
	}
	
	/**
	 * Handle ajax stuff
	 */
	protected function ajaxInternal()
	{
		// void
	}
	
	public static function preprocess()
	{
		if (self::$instance === null) {
			ErrorHandler::traceError('No step instance yet');
		}
		self::$instance->preprocessInternal();
	}
	
	public static function render()
	{
		if (self::$instance === null)
			ErrorHandler::traceError('No step instance yet');
		if (self::$instance->edit !== null)
			Message::addInfo('replacing-config', self::$instance->edit->title());
		self::$instance->renderInternal();
	}
	
	public static function ajax()
	{
		if (self::$instance === null) {
			ErrorHandler::traceError('No step instance yet');
		}
		self::$instance->ajaxInternal();
	}

}

/**
 * Start dialog for adding config. Ask for title,
 * show selection of modules.
 */
class AddConfig_Start extends AddConfig_Base
{

	protected function renderInternal()
	{
		$mods = ConfigModule::getList();
		$res = Database::simpleQuery("SELECT moduleid, title, moduletype, filepath FROM configtgz_module"
			. " ORDER BY title ASC"); // Move to ConfigModule
		if ($this->edit === null) {
			$active = array();
		} else {
			$active = $this->edit->getModuleIds();
		}
		$id = 0;
		$modGroups = array();
		foreach ($mods as &$mod) {
			$mod['groupid'] = 'g' . ++$id;
			$modGroups[$mod['group']] =& $mod;
		}
		unset($mod);
		foreach ($res as $row) {
			if (!isset($mods[$row['moduletype']])) {
				$mods[$row['moduletype']] = array(
					'unique' => false,
					'group' => 'Undefined moduletype in addconfig.inc.php',
					'groupid' => 'g' . ++$id,
				);
				$modGroups[$mods[$row['moduletype']]['group']] =& $mods[$row['moduletype']];
			}
			unset($group);
			$group =& $modGroups[$mods[$row['moduletype']]['group']];
			if (!isset($group['modules'])) {
				$group['modules'] = array();
			}
			if (empty($row['filepath']) || !file_exists($row['filepath'])) $row['missing'] = true;
			$row['active'] = in_array($row['moduleid'], $active);
			$group['modules'][] = $row;
		}
		if ($this->edit !== null) {
			$title = $this->edit->title();
		} else {
			$title = Request::any('title', '', 'string');
		}
		$dummy = 0;
		$sort = [];
		foreach ($modGroups as &$mod) {
			$sort[] = $mod['sortOrder'];
			if (!empty($mod['modules']) && $mod['unique']) {
				array_unshift($mod['modules'], array(
					'moduleid' => 'x' . (++$dummy),
					'title' => Dictionary::translate('lang_noModuleFromThisGroup'),
				));
			}
		}
		array_multisort($sort, SORT_ASC | SORT_NUMERIC, $modGroups);
		unset($mod);
		Render::addDialog(Dictionary::translate("lang_configurationCompilation"), false, 'cfg-start', array(
			'step' => 'AddConfig_Finish',
			'groups' => array_values($modGroups),
			'title' => $title,
			'edit' => $this->edit === null ? null : $this->edit->id(),
		));
	}

}

/**
 * Success dialog if adding config worked.
 */
class AddConfig_Finish extends AddConfig_Base
{
	/**
	 * @var ?ConfigTgz
	 */
	private $config = null;
	
	protected function preprocessInternal()
	{
		$modules = Request::post('module');
		$title = Request::post('title', Request::REQUIRED, 'string');
		if (!is_array($modules)) {
			Message::addError('missing-file');
			Util::redirect('?do=SysConfig&action=addconfig');
		}
		if ($this->edit === null) {
			$this->config = ConfigTgz::insert($title, $modules);
		} else {
			$this->edit->update($title, $modules);
			$this->config = $this->edit;
		}
		if ($this->config->generate($this->edit === null, 150) === false) {
			Message::addError('unsuccessful-action');
			Util::redirect('?do=SysConfig&action=addconfig');
		}
	}

	protected function renderInternal()
	{
		Render::addDialog(Dictionary::translate('lang_configurationCompilation'), false, 'cfg-finish', array(
			'configid' => $this->config->id()
		));
	}
	
}