<?php
class User {
  private $_db,
          $_data,
          $_shipdata,
          $_sessionName,
          $_cookieName,
          $_isLoggedIn;

  public function __construct($user = null) {
    $this->_db = DB::getInstance();

    $this->_sessionName = Config::get('session/session_name');
    $this->_cookieName = Config::get('remember/cookie_name');

    if(!$user) {
      if(Session::exists($this->_sessionName)) {
        $user = Session::get($this->_sessionName);

        if($this->find($user)) {
          $this->_isLoggedIn = true;
        } else {
          // process logout
        }
      }
    } else {
      $this->find($user);
    }
  }

  public function update($fields = array(), $id = null) {

    if(!$id && $this->isLoggedIn()) {
      $id = $this->data()->id;
    }

    if(!$this->_db->update('users', $id, $fields)) {
      throw new Exception('There was a problem updating');
    }
  }

  public function create($fields = array()) {
    if(!$this->_db->insert('users', $fields)) {
      throw new Exception('There was a problem creating an account.');
    }
  }

  public function insertation($table, $fields = array()) {
    if(!$this->_db->insert($table, $fields)) {
      throw new Exception('There was sa problem inserting some data.');
    }
  }

  public function find($user= null) {
    if($user) {
      $field = (is_numeric($user)) ? 'id' : 'username';
      $data = $this->_db->get('users', array($field, '=', $user));

      if($data->count()) {
        $this->_data = $data->first();
        return true;
      }
    }
    return false;
  }

  public function login($username = null, $password = null, $remember = true) {
    $user = $this->find($username);
    if($user) {
      if (password_verify(Input::get('password'), $this->data()->password)) {
        Session::put($this->_sessionName, $this->data()->id);

        if($remember) {
          $hash = Hash::unique();
          $hashCheck = $this->_db->get('users_session', array('user_id', '=', $this->data()->id));

          if(!$hashCheck->count()) {
            $this->_db->insert(array(
              'user_id' => $this->data()->id,
              'hash' => $hash
            ));
          } else {
            $hash = $hashCheck->first()->hash;
          }

          Cookie::put($this->_cookieName, $hash, Config::get('remember/cookie_expiry'));

        }
        return true;
      }
    }
    return false;
  }

  public function hasPermission($key) {
    $group = $this->_db->get('groups', array('id', '=', $this->data()->group));

    if($group->count()) {
      $permissions = json_decode($group->first()->permissions, true);

      if($permissions[$key] == true) {
        return true;
      }
    }
    return false;
  }

  public function exists() {
    return (!empty($this->_data)) ? true : false;
  }

  public function logout() {

    $this->_db->delete('users_session', array('user_id', '=', $this->data()->id));

    Session::delete($this->_sessionName);
    Cookie::delete($this->_cookieName);
  }

  public function data() {
    return $this->_data;
  }

  public function shipdata() {
    return $this->_shipdata;
  }

  public function isLoggedIn() {
    return $this->_isLoggedIn;
  }
}