<?php
/**
 * Test file for the Event Sources feature.
 *
 * @package Event_Bridge_For_ActivityPub
 * @since   1.0.0
 * @license AGPL-3.0-or-later
 */

namespace Event_Bridge_For_ActivityPub\Tests;

use WP_REST_Request;
use WP_REST_Server;

/**
 * Test class for the Event Sources Feature.
 *
 * @coversDefaultClass \Event_Bridge_For_ActivityPub\Event_Sources
 */
class Test_Event_Sources extends \WP_UnitTestCase {
	const FOLLOWED_ACTOR = array(
		'id'      => 'https://remote.example/@organizer',
		'type'    => 'Person',
		'inbox'   => 'https://remote.example/@organizer/inbox',
		'outbox'  => 'https://remote.example/@organizer/outbox',
		'name'    => 'The Organizer',
		'summary' => 'Just a random organizer of events in the Fediverse',
	);

	/**
	 * Post ID.
	 *
	 * @var int
	 */
	protected static $event_source_post_id;

	/**
	 * REST Server.
	 *
	 * @var WP_REST_Server
	 */
	protected $server;

	/**
	 * Create fake data before tests run.
	 *
	 * @param WP_UnitTest_Factory $factory Helper that creates fake data.
	 */
	public static function wpSetUpBeforeClass( $factory ) {
		// Follow actor.
		$event_source = \Event_Bridge_For_ActivityPub\ActivityPub\Model\Event_Source::init_from_array( self::FOLLOWED_ACTOR );
		$post_id      = $event_source->save();

		self::$event_source_post_id = $post_id;
	}


	/**
	 * Set up the test.
	 */
	public function set_up() {
		\add_option( 'permalink_structure', '/%postname%/' );

		global $wp_rest_server;
		$wp_rest_server = new WP_REST_Server();
		$this->server   = $wp_rest_server;

		do_action( 'rest_api_init' );

		\Activitypub\Rest\Server::add_hooks();
	}

	/**
	 * Tear down the test.
	 */
	public function tear_down() {
		\delete_option( 'permalink_structure' );
		\add_filter( 'activitypub_defer_signature_verification', '__return_false' );
	}

	/**
	 * Test receiving event from followed actor.
	 */
	public function test_incoming_event() {
		\add_filter( 'activitypub_defer_signature_verification', '__return_true' );

		$json = array(
			'id'     => 'https://remote.example/@organizer/events/new-year-party#create',
			'type'   => 'Create',
			'actor'  => 'https://remote.example/@organizer',
			'object' => array(
				'id'        => 'https://remote.example/@organizer/events/new-year-party',
				'type'      => 'Event',
				'startTime' => \gmdate( 'Y-m-d\TH:i:s\Z', time() + WEEK_IN_SECONDS ),
				'name'      => 'New Years Party 50/51',
				'to'        => 'https://www.w3.org/ns/activitystreams#Public',
				'published' => '2020-01-01T00:00:00Z',
			),
		);

		$request = new WP_REST_Request( 'POST', '/activitypub/1.0/users/0/inbox' );
		$request->set_header( 'Content-Type', 'application/activity+json' );
		$request->set_body( \wp_json_encode( $json ) );

		// Dispatch the request.
		$response = \rest_do_request( $request );
		$this->assertEquals( 202, $response->get_status() );
	}

	/**
	 * Test receiving event from followed actor with missing start time.
	 */
	public function test_incoming_create_with_missing_start_time() {
		\add_filter( 'activitypub_defer_signature_verification', '__return_true' );

		$json = array(
			'id'     => 'https://remote.example/@organizer/events/new-year-party#create',
			'type'   => 'Create',
			'actor'  => 'https://remote.example/@organizer',
			'object' => array(
				'id'        => 'https://remote.example/@organizer/events/new-year-party',
				'type'      => 'Event',
				'name'      => 'New Years Party 50/51',
				'to'        => 'https://www.w3.org/ns/activitystreams#Public',
				'published' => '2020-01-01T00:00:00Z',
			),
		);

		$request = new WP_REST_Request( 'POST', '/activitypub/1.0/users/0/inbox' );
		$request->set_header( 'Content-Type', 'application/activity+json' );
		$request->set_body( \wp_json_encode( $json ) );

		// Dispatch the request.
		$response = \rest_do_request( $request );
		$this->assertEquals( 400, $response->get_status() );
	}

	/**
	 * Test receiving event from followed actor with wrongly formatted start time.
	 */
	public function test_incoming_event_with_faulty_start_time() {
		\add_filter( 'activitypub_defer_signature_verification', '__return_true' );

		$json = array(
			'id'     => 'https://remote.example/@organizer/events/new-year-party#create',
			'type'   => 'Create',
			'actor'  => 'https://remote.example/@organizer',
			'object' => array(
				'id'        => 'https://remote.example/@organizer/events/new-year-party',
				'type'      => 'Event',
				'name'      => 'New Years Party 50/51',
				'startTime' => \gmdate( 'Y-m-d\TH:i:s\Z', time() + WEEK_IN_SECONDS ),
				'to'        => 'https://www.w3.org/ns/activitystreams#Public',
				'published' => '2020-01-01T00:00:00Z',
			),
		);

		$request = new WP_REST_Request( 'POST', '/activitypub/1.0/users/0/inbox' );
		$request->set_header( 'Content-Type', 'application/activity+json' );
		$request->set_body( \wp_json_encode( $json ) );

		// Dispatch the request.
		$response = \rest_do_request( $request );
		$this->assertEquals( 401, $response->get_status() );
	}

	/**
	 * We do understand, but do not care about incoming events that happened in the past.
	 */
	public function test_incoming_event_which_took_place_in_the_past() {
		\add_filter( 'activitypub_defer_signature_verification', '__return_true' );

		$json = array(
			'id'     => 'https://remote.example/@organizer/events/new-year-party#create',
			'type'   => 'Create',
			'actor'  => 'https://remote.example/@organizer',
			'object' => array(
				'id'        => 'https://remote.example/@organizer/events/new-year-party',
				'type'      => 'Event',
				'name'      => 'New Years Party 50/51',
				'startTime' => \gmdate( 'Y-m-d\TH:i:s\Z', time() - WEEK_IN_SECONDS ),
				'to'        => 'https://www.w3.org/ns/activitystreams#Public',
				'published' => '2020-01-01T00:00:00Z',
			),
		);

		$request = new WP_REST_Request( 'POST', '/activitypub/1.0/users/0/inbox' );
		$request->set_header( 'Content-Type', 'application/activity+json' );
		$request->set_body( \wp_json_encode( $json ) );

		// Dispatch the request.
		$response = \rest_do_request( $request );
		// This should be 403 but it is not possible without lots of hacks at the moment.
		$this->assertEquals( 401, $response->get_status() );
	}


	/**
	 * Test receiving event from actor we do not follow.
	 */
	public function test_incoming_create_from_non_followed_actor() {
		\add_filter( 'activitypub_defer_signature_verification', '__return_true' );

		$json = array(
			'id'     => 'https://remote.example/@another_organizer/events/new-year-party#create',
			'type'   => 'Create',
			'actor'  => 'https://remote.example/@another_organizer',
			'object' => array(
				'id'        => 'https://remote.example/@another_organizer/events/new-year-party',
				'type'      => 'Event',
				'startTime' => '2050-12-31T18:00:00Z',
				'name'      => 'New Years Party 50/51',
				'to'        => 'https://www.w3.org/ns/activitystreams#Public',
				'published' => '2020-01-01T00:00:00Z',
			),
		);

		$request = new WP_REST_Request( 'POST', '/activitypub/1.0/users/0/inbox' );
		$request->set_header( 'Content-Type', 'application/activity+json' );
		$request->set_body( \wp_json_encode( $json ) );

		// Dispatch the request.
		$response = \rest_do_request( $request );
		$this->assertEquals( 401, $response->get_status() );
	}
}