<?php

namespace App\Entity;

use \App\Entity\User;

class Session {

	protected static $tablename = "session";
	protected User $user_instance;

	use \libs\DataContain;
	use \libs\DataStorage;


	public function __construct() {
		$this -> set_fields([
			"user_id", "token", "state", "last_activity", "create_at"
		]);
	}

	public function force_activity() {
		$this -> last_activity = get_formatted_timestamp();
		$this -> update();
	}

	public function user() :User {
		if(!isset($this -> user_instance)) {
			if(!$this -> user_id) {
				return throw new \Exception("Error of creating User instance. User_id is undefined");
			}

			$this -> user_instance = new User();
			$this -> user_instance -> init_by_id($this -> user_id);
		}

		return $this -> user_instance;
	}

	public function init_for_user(int $user_id) {
		$this -> user_instance = new User();

		if(!$this -> user() -> init_by_id($user_id)) {
			return false;
		}

		$this -> user_id = $this -> user() -> get_id();
		$this -> state = "active";
		$this -> token = gen_token($this -> user() -> get_id());
		$this -> last_activity = get_formatted_timestamp();
		$this -> create_at = get_formatted_timestamp();

		$this -> create_new();

		return $this;
	}

	public function init_by_token(String $token) :bool {
		return $this -> init_by_field("token", $token);
	}

	public function kill() :bool {
		if(!$this -> id) {
			return throw new \Exception("Tried to kill uninitialized session");
		}

		$this -> state = "closed";
		return $this -> update();
	}
}