<?php

class User
{
	private $id;
	public $email;
	private $pwd_hash;
	public $surname;
	public $first_name;
	public $school;
	public $city;
	public $country;
	public $class;
	public $description;
	private $role;
	private $team_id;
	private $year;
	private $confirm_email;
	private $forgotten_password;
	private $inscription_date;
	private $receive_animath_mails;
	
	private function __construct() {}

	public static function fromId($id)
	{
		global $DB;
		$req = $DB->prepare("SELECT * FROM `users` WHERE `id` = ?;");
		$req->execute([htmlspecialchars($id)]);
		$data = $req->fetch();

		if ($data === false)
			return null;

		$user = new User();
		$user->fill($data);
		return $user;
	}

	public static function fromEmail($email)
	{
		global $DB, $YEAR;
		$req = $DB->prepare("SELECT * FROM `users` WHERE `email` = ? AND `year` = $YEAR;");
		$req->execute([htmlspecialchars($email)]);
		$data = $req->fetch();

		if ($data === false)
			return null;

		$user = new User();
		$user->fill($data);
		return $user;
	}

	public static function getAdmins()
	{
		global $DB, $YEAR;
		$admins = [];
		$req = $DB->query("SELECT * FROM `users` WHERE `role` = 'ADMIN' AND `year` = $YEAR;");

		while (($data = $req->fetch()) !== false) {
			$admin = new User();
			$admin->fill($data);
			$admins[] = $admin;
		}

		return $admins;
	}

	public static function getAllUsers()
	{
		global $DB, $YEAR;
		$orphans = [];
		$req = $DB->query("SELECT * FROM `users` WHERE `role` != 'ADMIN' AND `year` = $YEAR ORDER BY `role`, `inscription_date`;");

		while (($data = $req->fetch()) !== false) {
			$orphan = new User();
			$orphan->fill($data);
			$orphans[] = $orphan;
		}

		return $orphans;
	}

	public static function getOrphanUsers()
	{
		global $DB, $YEAR;
		$orphans = [];
		$req = $DB->query("SELECT * FROM `users` WHERE `role` != 'ADMIN' AND `team_id` IS NULL "
			. "AND NOT EXISTS (SELECT 1 FROM `teams` WHERE `encadrant` = `users`.`id`) "
			. "AND `year` = $YEAR ORDER BY `role`, `inscription_date`;");

		while (($data = $req->fetch()) !== false) {
			$orphan = new User();
			$orphan->fill($data);
			$orphans[] = $orphan;
		}

		return $orphans;
	}
	
	private function fill($data)
	{
		$this->id = $data["id"];
		$this->email = $data["email"];
		$this->pwd_hash = $data["pwd_hash"];
		$this->surname = $data["surname"];
		$this->first_name = $data["first_name"];
		$this->school = $data["school"];
		$this->city = $data["city"];
		$this->country = $data["country"];
		$this->class = SchoolClass::fromName($data["class"]);
		$this->description = $data["description"];
		$this->role = Role::fromName($data["role"]);
		$this->team_id = $data["team_id"];
		$this->year = $data["year"];
		$this->confirm_email = $data["confirm_email"];
		$this->forgotten_password = $data["forgotten_password"];
		$this->inscription_date = $data["inscription_date"];
		$this->receive_animath_mails = $data["receive_animath_mails"];
	}

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

	public function setEmail($email)
	{
		global $DB;
		$this->email = $email;
		$DB->prepare("UPDATE `users` SET `email` = ? WHERE `id` = ?;")->execute([$email, $this->getId()]);
	}

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

	public function checkPassword($password)
	{
		return password_verify($password, $this->pwd_hash);
	}

	public function setPassword($password)
	{
		$this->setPasswordHash(password_hash($password, PASSWORD_BCRYPT));
	}

	private function setPasswordHash($password_hash)
	{
		global $DB;
		$this->pwd_hash = $password_hash;
		$DB->prepare("UPDATE `users` SET `pwd_hash` = ? WHERE `id` = ?;")->execute([$password_hash, $this->getId()]);
	}

	public function getSurname()
	{
		return $this->surname;
	}

	public function setSurname($surname)
	{
		global $DB;
		$this->surname = $surname;
		$DB->prepare("UPDATE `users` SET `surname` = ? WHERE `id` = ?;")->execute([$surname, $this->getId()]);
	}

	public function getFirstName()
	{
		return $this->first_name;
	}

	public function setFirstName($first_name)
	{
		global $DB;
		$this->first_name = $first_name;
		$DB->prepare("UPDATE `users` SET `first_name` = ? WHERE `id` = ?;")->execute([$first_name, $this->getId()]);
	}

    public function getSchool()
    {
        return $this->school;
    }

    public function setSchool($school)
    {
        global $DB;
        $this->school = $school;
        $DB->prepare("UPDATE `users` SET `school` = ? WHERE `id` = ?;")->execute([$school, $this->getId()]);
    }

    public function getCity()
    {
        return $this->city;
    }

    public function setCity($city)
    {
        global $DB;
        $this->city = $city;
        $DB->prepare("UPDATE `users` SET `city` = ? WHERE `id` = ?;")->execute([$city, $this->getId()]);
    }

    public function getCountry()
    {
        return $this->country;
    }

    public function setCountry($country)
    {
        global $DB;
        $this->country = $country;
        $DB->prepare("UPDATE `users` SET `country` = ? WHERE `id` = ?;")->execute([$country, $this->getId()]);
    }

	public function getClass()
	{
		return $this->class;
	}

	public function setClass($class)
	{
		global $DB;
		$this->class = $class;
		$DB->prepare("UPDATE `users` SET `class` = ? WHERE `id` = ?;")->execute([SchoolClass::getName($class), $this->getId()]);
	}

	public function getDescription()
	{
		return $this->description;
	}

	public function setDescription($desc)
	{
		global $DB;
		$this->description = $desc;
		$DB->prepare("UPDATE `users` SET `description` = ? WHERE `id` = ?;")->execute([$desc, $this->getId()]);
	}

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

	public function setRole($role)
	{
		global $DB;
		$this->role = $role;
		$DB->prepare("UPDATE `users` SET `role` = ? WHERE `id` = ?;")->execute([Role::getName($role), $this->getId()]);
	}

	public function getTeamId()
	{
		return $this->team_id;
	}

	public function setTeamId($team_id)
	{
		global $DB;
		$this->team_id = $team_id;
		$DB->prepare("UPDATE `users` SET `team_id` = ? WHERE `id` = ?;")->execute([$team_id, $this->getId()]);
	}

	public function getConfirmEmailToken()
	{
		return $this->confirm_email;
	}

	public function setConfirmEmailToken($token)
	{
		global $DB;
		$this->confirm_email = $token;
		$DB->prepare("UPDATE `users` SET `confirm_email` = ? WHERE `id` = ?;")->execute([$token, $this->getId()]);
	}

	public function getForgottenPasswordToken()
	{
		return $this->forgotten_password;
	}

	public function setForgottenPasswordToken($token)
	{
		global $DB;
		$this->forgotten_password = $token;
		$DB->prepare("UPDATE `users` SET `forgotten_password` = ? WHERE `id` = ?;")->execute([$token, $this->getId()]);
	}

	public function getInscriptionDate()
	{
		return $this->inscription_date;
	}

	public function doReceiveAnimathMails()
	{
		return $this->receive_animath_mails;
	}

	public function setReceiveAnimathMails($receive_animath_mails)
	{
		global $DB;
		$this->receive_animath_mails = $receive_animath_mails;
		$DB->prepare("UPDATE `users` SET `receive_animath_mails` = ? WHERE `id` = ?;")->execute([$receive_animath_mails ? 1 : 0, $this->getId()]);
	}

	public function getAllDocuments()
	{
		global $DB;
		$req = $DB->query("SELECT * FROM `documents` AS `t1` "
			. "INNER JOIN (SELECT `user`, MAX(`uploaded_at`) AS `last_upload`, COUNT(`team`) AS `version` FROM `documents` GROUP BY `problem`, `user`) `t2` "
				. "ON `t1`.`user` = `t2`.`user` "
				. "WHERE `t1`.`uploaded_at` = `t2`.`last_upload` AND `t1`.`user` = $this->id;");

		$docs = [];

		while (($data = $req->fetch()) !== false)
			$docs[] = Document::fromData($data);

		return $docs;
	}

	// Seulement pour les encadrants
	public function getTeams()
	{
		global $DB;
		$req = $DB->query("SELECT `id` FROM `teams` WHERE `encadrant` = $this->id;");

		$teams = [];

		while (($data =$req->fetch()) !== false)
			$teams[] = Team::fromId($data["id"]);

		return $teams;
	}
}