<?php

elgg_register_event_handler('init','system','polls_init');

function polls_init() {

	elgg_register_library('elgg:polls', elgg_get_plugins_path() . 'polls/models/model.php');

	// Set up menu for logged in users
	if (elgg_is_logged_in()) {
		$item = new ElggMenuItem('polls', elgg_echo('polls'), 'polls/owner/' . elgg_get_logged_in_user_entity()->username);
	} else {
		$item = new ElggMenuItem('polls', elgg_echo('poll'), 'polls/all');
	}
	elgg_register_menu_item('site', $item);

	// Extend system CSS with our own styles, which are defined in the polls/css view
	elgg_extend_view('css/elgg','polls/css');

	// Extend hover-over menu
	elgg_extend_view('profile/menu/links','polls/menu');

	// Register a page handler, so we can have nice URLs
	elgg_register_page_handler('polls','polls_page_handler');

	// Register a URL handler for poll posts
	elgg_register_entity_url_handler('object','poll','polls_url');

	// notifications
	$elgg_version = explode('.',get_version(true));
	if ($elgg_version[1] > 8) {
  	$send_notification = elgg_get_plugin_setting('send_notification', 'polls');
  	if (!$send_notification || $send_notification != 'no') {
  		elgg_register_notification_event('object', 'poll');
  		elgg_register_plugin_hook_handler('prepare', 'notification:create:object:poll', 'polls_prepare_notification');
  	}
	}

	// add link to owner block
	elgg_register_plugin_hook_handler('register', 'menu:owner_block', 'polls_owner_block_menu');
	elgg_register_plugin_hook_handler('widget_url', 'widget_manager', 'polls_widget_url_handler');

	// Register entity type
	elgg_register_entity_type('object','poll');

	// register the JavaScript
	$js = elgg_get_simplecache_url('js', 'polls/js');
	elgg_register_simplecache_view('js/polls/js');
	elgg_register_js('elgg.polls', $js);

	// add group widget
	$group_polls = elgg_get_plugin_setting('group_polls', 'polls');
	if (!$group_polls || $group_polls != 'no') {
		elgg_extend_view('groups/tool_latest', 'polls/group_module');
	}

	if (!$group_polls || ($group_polls == 'yes_default')) {
		add_group_tool_option('polls',elgg_echo('polls:enable_polls'),TRUE);
	} else if ($group_polls == 'yes_not_default') {
		add_group_tool_option('polls',elgg_echo('polls:enable_polls'),FALSE);
	}

	//add widgets
//	elgg_register_widget_type('poll',elgg_echo('polls:my_widget_title'),elgg_echo('polls:my_widget_description'), "profile,groups");
	elgg_register_widget_type('latestPolls',elgg_echo('polls:latest_widget_title'),elgg_echo('polls:latest_widget_description'), "index,profile,dashboard,groups");
	elgg_register_widget_type('poll_individual',elgg_echo('polls:individual'),elgg_echo('poll_individual_group:widget:description'), "index,profile,dashboard,groups");

	// Register actions
	$action_path = elgg_get_plugins_path() . 'polls/actions/polls';
	elgg_register_action("polls/add","$action_path/add.php");
	elgg_register_action("polls/edit","$action_path/edit.php");
	elgg_register_action("polls/delete","$action_path/delete.php");
	elgg_register_action("polls/vote","$action_path/vote.php");

}


/**
 * poll page handler; allows the use of fancy URLs
 *
 * @param array $page From the page_handler function
 * @return true|false Depending on success
 */
function polls_page_handler($page) {
	elgg_load_library('elgg:polls');
	$page_type = $page[0];
	switch($page_type) {
		case "view":
			echo polls_get_page_view($page[1]);
			break;
		case "all":
			echo polls_get_page_list($page_type);
			break;
		case "add":
		case "edit":
			$container = null;
			if(isset($page[1])){
				$container = $page[1];
			}
			echo polls_get_page_edit($page_type,$container);
			break;
		case "friends":
		case "owner":
			$username = $page[1];
			$user = get_user_by_username($username);
			$user_guid = $user->guid;
			echo polls_get_page_list($page_type,$user_guid);
			break;
		case "group":
			echo polls_get_page_list($page_type,$page[1]);
			break;
		default:
			return FALSE;
			break;
	}
	return TRUE;
}

/**
 * Populates the ->getUrl() method for poll objects
 *
 * @param ElggEntity $pollpost poll post entity
 * @return string poll post URL
 */
function polls_url($poll) {
	$title = elgg_get_friendly_title($poll->title);
	return  "polls/view/" . $poll->guid . "/" . $title;
}

/**
 * Add a menu item to an owner block
 */
function polls_owner_block_menu($hook, $type, $return, $params) {
	if (elgg_instanceof($params['entity'], 'user')) {
		$url = "polls/owner/{$params['entity']->username}";
		$item = new ElggMenuItem('polls', elgg_echo('polls'), $url);
		$return[] = $item;
	} else {
		elgg_load_library('elgg:polls');
		if (polls_activated_for_group($params['entity'])) {
			$url = "polls/group/{$params['entity']->guid}/all";
			$item = new ElggMenuItem('polls', elgg_echo('polls:group_polls'), $url);
			$return[] = $item;
		}
	}

	return $return;
}

/**
 * Prepare a notification message about a created poll
 *
 * @param string                          $hook         Hook name
 * @param string                          $type         Hook type
 * @param Elgg_Notifications_Notification $notification The notification to prepare
 * @param array                           $params       Hook parameters
 * @return Elgg_Notifications_Notification
 */
function polls_prepare_notification($hook, $type, $notification, $params) {
	$entity = $params['event']->getObject();
	$owner = $params['event']->getActor();
	$recipient = $params['recipient'];
	$language = $params['language'];
	$method = $params['method'];

	$notification->subject = elgg_echo('polls:add', array(), $language);
	$notification->body = elgg_echo('polls:notification', array(
		$owner->name,
		$entity->title,
		$entity->getURL()
	), $language);
	$notification->summary = elgg_echo('polls:notify:summary', array($entity->title), $language);

	return $notification;
}

function polls_widget_url_handler($hook, $type, $return, $params){
	$result = $return;

	if(empty($result) && !empty($params) && is_array($params)){
		$widget = elgg_extract("entity", $params);

		if(!empty($widget) && elgg_instanceof($widget, "object", "widget")){
			switch($widget->handler){
				case "latestPolls":
					if($widget->context == "groups"){
						$result = "polls/group/" . $widget->getOwnerGUID() . "/all";
					} else {
						$result = "polls/all";
					}
					break;
				case "poll":
					if($widget->context == "groups"){
						$result = "polls/group/" . $widget->getOwnerGUID() . "/all";
					} else {
						$result = "polls/owner/" . $widget->getOwnerEntity()->username . "/all";
					}
					break;
				case "poll_individual":

					break;
			}
		}
	}

	return $result;
}