<?php

class Crunchbutton_Auth {
	private $_user;
	private $_session;
	
	public function __construct() {
		$this->_session = new Crunchbutton_Session;
		session_start();

		if ($this->session()->id_user) {
			if ($this->session()->ip == $_SERVER['REMOTE_ADDR']) {
				$this->_user = new Crunchbutton_User($this->session()->id_user);
				$this->session()->date_active = date('Y-m-d H:i:s');
				$this->session()->save();
			}
		} else {
			$this->_user = new Crunchbutton_User;
		}
	}
	
	public function doAuth($type, $id) {
		$auth = Crunchbutton_User_Auth::byTypeId($type,$id);

		if ($auth->active && $auth->user()->active) {
			$this->_user = $auth->user();
			$this->session()->id_user = $this->user()->id_user;
			$this->session()->id_user_auth = $auth->id_user_auth;
			$this->session()->save();

			return true;
		}
		return false;
	}


	public static function facebook() {
		// verify that a facebook user exists to create it
		$facebook = new Cana_Facebook([
			'appId' => Cana::config()->facebook->app,
			'secret' => Cana::config()->facebook->secret
		]);
		
		$fbUser = $facebook->getUser();
		
		if ($fbUser) {
			try {
				$profile = (object)$facebook->api('/me');
			} catch (Cana_Facebook_Exception $e) {
				$profile = null;
			}
		}

		if ($profile && $profile->id) {
			$user = User::facebook($profile->id);

			if (!$user->id_user) {
	
				if ($profile && $profile->id) {
					$user = new User;
					self::load($user,$profile);
				}
			}
		}
		return $user ? $user : false;
	}
	
	public function user($user = null) {
		if ($user) $this->_user = $user;

		if (!isset($this->_user)) {
			$this->_user = new Crunchbutton_User;
		}

		return $this->_user;
	}
	

	public function get($var) {
		return $_SESSION[$var];
	}

	public function set($var,$value) {
		$_SESSION[$var] = $value;
	}

	public function id() {
		return $this->_session;
	}

	public function ip() {
		return $this->_ip;
	}
	
	public function destroy() {
		$this->_session = session_id();
		Caffeine::db()->query('UPDATE session SET active=0 WHERE session="'.$this->id().'"');
		session_regenerate_id();
		$this->_session = session_id();
		$this->_user = new Crunchbutton_User;
	}

	
	public static function load($user, $profile) {
		$user->permalink = $profile->username ? $profile->username : $profile->id;
		$user->fbid = $profile->id;
		$user->first_name = $profile->first_name;
		$user->last_name = $profile->last_name;
		$user->birthday = $profile->birthday;
		$user->email = $profile->email;
		$user->locale = $profile->locale;
		$user->gender = $profile->gender;
		$user->timezone = $profile->timezone;
		$user->save();	
	}
	
	public function session() {
		return $this->_session;
	}
}