<?php

namespace Models;

use Models\Acl\Role,
    Doctrine\Common\Collections\ArrayCollection;

/**
 * @Entity @Table(name="user")
 */

class User
{

    const NOT_FOUND             = 1;
    const CREDENTIAL_INVALID    = 2;

    /**
     * @Id @Column(name="id", type="integer")
     * @GeneratedValue(strategy="AUTO")
     */
    private $id;

    /**
     * @Column(name="created", type="datetime")
     */
    private $created;

    /**
     * @Column(name="updated", type="datetime")
     */
    private $updated;

    /**
     * @Column(name="last_online", type="datetime", nullable="false")
     */
    private $lastOnline;

    /** @Column(name="username", type="string", length=50,unique="true") */
    private $username;

    /** @Column(name="password", type="string", length=50) */
    private $password;

    /** @Column(name="salt", type="string", length=4) */
    private $salt;

    /** @Column(name="email", type="string", length=50) */
    private $email;

    /**
     * @OneToOne(targetEntity="Models\User\Details", inversedBy="user", cascade={"persist", "remove"})
     * @JoinColumn(name="details_id", referencedColumnName="id")
     */
    private $details;

    /**
     * @OneToOne(targetEntity="Models\Acl\Role")
     * @JoinColumn(name="role_id", referencedColumnName="id")
     */
    private $role;

    /**
    * @ManyToMany(targetEntity="Models\Viewer\Picture")
    * @JoinTable(name="user_join_viewer_picture",
    *      joinColumns={@JoinColumn(name="user_id", referencedColumnName="id")},
    *      inverseJoinColumns={@JoinColumn(name="picture_id", referencedColumnName="id", unique=true)}
    *      )
    */
    private $viewerPictures;

    public function __construct($username, $password)
    {
        // constructor is never called by Doctrine
        $this->created = $this->updated = new \DateTime("now");
        $this->setUsername($username);
        $this->setPassword($password);
        $this->viewerPictures = new ArrayCollection();
    }

    public function getCreated()
    {
        return $this->created;
    }

    /**
     * @PreUpdate
     */
    public function setUpdated()
    {
        $this->updated = new \DateTime("now");
    }

    public function getUpdated()
    {
        return $this->updated;
    }

    public function setLastOnline(\DateTime $date)
    {
        $this->lastOnline = $date;
    }

    public function getLastOnline()
    {
        return $this->lastOnline;
    }

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

    public function getUsername()
    {
        return $this->username;
    }

    public function setUsername($username)
    {
        $this->username = $username;
    }

    public function setPassword($password)
    {
        $salt = "";
        for ($i=0;$i<4;$i++)
            $salt .= chr(rand(ord('a'), ord('z')));

        $this->salt = $salt;
        $this->password = md5(md5($salt).md5($password));
    }

    public function checkPassword($password)
    {
        if ($this->password == md5(md5($this->salt).md5($password)))
            return true;
        else
            return false;
    }

    public function getEmail()
    {
        return $this->username;
    }

    public function setEmail($email)
    {
        $this->email = $email;
    }


    public function setDetails(User\Details $details)
    {
        $details->setUser($this);
        $this->details = $details;
    }

    public function getDetails()
    {
        return $this->details;
    }

    public function setRole(Role $role)
    {
        $this->role = $role;
    }

    public function getRole()
    {
        return $this->role;
    }

    public function getViewerPictures()
    {
        return $this->viewerPictures;
    }

    /**
     *
     * @param string $username
     * @param string $password
     * @throws Exception
     * @return User
     */

    public static function authenticate($username, $password)
    {
        $em = \Zend_Registry::get('Doctrine_EntityManager');
        $user = $em->getRepository('Models\User')->findOneBy(array('username' => $username));
        if ($user)
        {
            if ($user->checkPassword($password))
                return $user->getId();

            throw new \Exception(self::CREDENTIAL_INVALID);
        }

        throw new \Exception(self::NOT_FOUND);

    }


}