<?php

$has_error = false;
$error_message = null;

if (isset($_POST["login"]) && !isset($_SESSION["user_id"])) {
	$logging_in_user = new LoggingInUser($_POST);
	try {
		$logging_in_user->makeVerifications();
		$logging_in_user->login();
	} catch (AssertionError $e) {
		$has_error = true;
		$error_message = $e->getMessage();
	}
}

if (isset($_POST["forgotten_password"]) && !isset($_SESSION["user_id"])) {
	$recuperate_account = new RecuperateAccount($_POST);
	try {
		$recuperate_account->makeVerifications();
		$recuperate_account->recuperateAccount();
	} catch (AssertionError $e) {
		$has_error = true;
		$error_message = $e->getMessage();
	}
}

if (isset($_GET["reset_password"]) && isset($_GET["token"]) && !isset($_SESSION["user_id"])) {
	$reset_password = new ResetPassword($_GET, $_POST);
	try {
		$reset_password->makeVerifications();
		if (isset($_POST["password"]))
			$reset_password->resetPassword();
	} catch (AssertionError $e) {
		$has_error = true;
		$error_message = $e->getMessage();
	}
}

if (isset($_GET["confirmation-mail"]) && !isset($_SESSION["user_id"]))
	sendConfirmEmail();

class LoggingInUser
{
	public $email;
	/** @var User $user */
	public $user;
	private $password;

	public function __construct($data)
	{
		foreach ($data as $key => $value)
			$this->$key = htmlspecialchars($value);
	}

	public function makeVerifications()
	{
		ensure(filter_var($this->email, FILTER_VALIDATE_EMAIL), "L'adresse email est invalide.");
		$this->user = User::fromEmail($this->email);
		ensure($this->user != null, "Le compte n'existe pas.");
		ensure($this->user->checkPassword($this->password), "Le mot de passe est incorrect.");
		if ($this->user->getConfirmEmailToken() != null) {
			$_SESSION["confirm_email"] = $this->email;
			/** @noinspection HtmlUnknownTarget */
			throw new AssertionError("L'adresse mail n'a pas été validée. Veuillez vérifier votre boîte mail (surtout vos spams). "
				. "<a href=\"/connexion/confirmation-mail\">Cliquez ici pour renvoyer le mail de confirmation</a>.");
		}
	}

	public function login()
	{
		$_SESSION["user_id"] = $this->user->getId();
		$this->user->setForgottenPasswordToken(null);
		loadUserValues();
	}
}

class RecuperateAccount
{
	public $email;
	/** @var User $user */
	public $user;

	public function __construct($data)
	{
		foreach ($data as $key => $value)
			$this->$key = htmlspecialchars($value);
	}

	public function makeVerifications()
	{
		ensure(filter_var($this->email, FILTER_VALIDATE_EMAIL), "L'adresse email est invalide.");
		$this->user = User::fromEmail($this->email);
		ensure($this->user != null, "Le compte n'existe pas.");
	}

	public function recuperateAccount()
	{
		$token = genRandomPhrase(64);
		$this->user->setForgottenPasswordToken($token);
		Mailer::sendForgottenPasswordProcedureMail($this->user);
	}
}

class ResetPassword
{
	public $token;
	/** @var User $user */
	public $user;
	private $password;
	private $confirm_password;

	public function __construct($data, $data2)
	{
		foreach ($data as $key => $value)
			$this->$key = htmlspecialchars($value);
		foreach ($data2 as $key => $value)
			$this->$key = htmlspecialchars($value);
	}

	public function makeVerifications()
	{
		global $DB;
		$data = $DB->query("SELECT `id` FROM `users` WHERE `forgotten_password` = '" . $this->token . "';")->fetch();
		ensure($data !== false, "Il n'y a pas de compte à récupérer avec ce jeton.");
		$this->user = User::fromId($data["id"]);

		if (!isset($_POST["password"]))
			return;

		ensure($this->password == $this->confirm_password, "Les deux mots de passe sont différents.");
		ensure(strlen($this->password) >= 8, "Le mot de passe doit comporter au moins 8 caractères.");
	}

	public function resetPassword()
	{
		$this->user->setForgottenPasswordToken(null);
		$this->user->setPassword($this->password);

		Mailer::sendChangePasswordMail($this->user);

		return false;
	}
}

function sendConfirmEmail()
{
	global $URL_BASE;

	$email = htmlspecialchars($_SESSION["confirm_email"]);

	if (!isset($email)) {
		header("Location: $URL_BASE/connexion");
		exit();
	}

	$user = User::fromEmail($email);

	if ($user === null) {
		unset($_SESSION["confirm_email"]);
		header("Location: $URL_BASE/connexion");
		exit();
	}

	Mailer::sendConfirmEmail($user);

	return false;
}

require_once "server_files/views/connexion.php";