<?php
    function setNamePart(string $part, string $value, string $otherPart, string $otherValue): bool
    {
        global $RUNTIME;

        $query = $RUNTIME['PDO']->prepare('SELECT 1 FROM UserAccounts WHERE '.$part.' = ? AND '.$otherPart.' = ?');
        $query->execute(array($value, $otherValue));

        if ($query->rowCount() == 0) {
            $statement = $RUNTIME['PDO']->prepare('UPDATE UserAccounts SET '.$part.' = ? WHERE PrincipalID = ?');
            $statement->execute(array($value, $_SESSION['UUID']));
            return true;
        }

        return false;
    }

    $statement = $RUNTIME['PDO']->prepare("CREATE TABLE IF NOT EXISTS `iarstates` (`userID` VARCHAR(36) NOT NULL COLLATE 'utf8_unicode_ci', `filesize` BIGINT(20) NOT NULL DEFAULT '0', `iarfilename` VARCHAR(64) NOT NULL COLLATE 'utf8_unicode_ci', `running` INT(1) NOT NULL DEFAULT '0', PRIMARY KEY (`userID`) USING BTREE) COLLATE='utf8_unicode_ci' ENGINE=InnoDB;");
    $statement->execute();

    //Prüfe ob IAR grade erstellt wird.
    $statementIARCheck = $RUNTIME['PDO']->prepare('SELECT 1 FROM iarstates WHERE userID =:userID');
    $statementIARCheck->execute(['userID' => $_SESSION['UUID']]);
    $IARRUNNING = $statementIARCheck->rowCount() != 0;
    $statementIARCheck->closeCursor();
    
    if ($_SERVER['REQUEST_METHOD'] == 'POST') {
        include_once 'app/FormValidator.php';

        if (isset($_POST['createIAR'])) {
            $validator = new FormValidator(array()); // CSRF validation only
            if($validator->isValid($_POST) && !$IARRUNNING) {
                $iarname = md5(time().$_SESSION['UUID'] . rand()).".iar";
                
                $statementIARSTART = $RUNTIME['PDO']->prepare('INSERT INTO iarstates (userID, filesize, iarfilename) VALUES (:userID, :filesize, :iarfilename)');
                $statementIARSTART->execute(['userID' => $_SESSION['UUID'], 'filesize' => 0, 'iarfilename' => $iarname]);

                $_SESSION['iar_created'] = true;
            }
        }
        elseif (isset($_POST['saveProfileData'])) {
            $validator = new FormValidator(array(
                'formInputFeldVorname' => array('regex' => '/^[^\\/<>\s]{1,64}$/'),
                'formInputFeldNachname' => array('regex' => '/^[^\\/<>\s]{1,64}$/'),
                'formInputFeldEMail' => array('regex' => '/^\S{1,64}@\S{1,250}.\S{2,64}$/'),
                'formInputFeldOfflineIM' => array('regex' => '/^(|on)$/'),
                'formInputFeldPartnerName' => array('regex' => '/^[^\\/<>\s]{1,64} [^\\/<>\s]{1,64}$/')
            ));
            
            if ($validator->isValid($_POST)) {
                if(isset($_POST['formInputFeldVorname'])) {
                    $NewFirstName = trim($_POST['formInputFeldVorname']);
                    
                    if($NewFirstName != "" && $_SESSION['FIRSTNAME'] != $NewFirstName) {
                        if(setNamePart('FirstName', $NewFirstName, 'LastName', isset($_POST['formInputFeldNachname']) && strlen(trim($_POST['formInputFeldNachname'])) > 0 ? $_POST['formInputFeldNachname'] : $_SESSION['LASTNAME'])) {
                            $_SESSION['FIRSTNAME'] = $NewFirstName;
                            $_SESSION['USERNAME'] = $_SESSION['FIRSTNAME']." ".$_SESSION['LASTNAME'];
                            $_SESSION['DISPLAYNAME'] = strtoupper($_SESSION['USERNAME']);
                        }
                        else {
                            $_SESSION['profile_info'] = 'Der gewählte Name ist bereits vergeben.';
                        }
                    }
                }
            
                if (isset($_POST['formInputFeldNachname'])) {
                    $NewLastName = trim($_POST['formInputFeldNachname']);
                    
                    if ($NewLastName != "" && $_SESSION['LASTNAME'] != $NewLastName) {
                        if (setNamePart('LastName', $NewLastName, 'FirstName', isset($_POST['formInputFeldVorname']) && strlen(trim($_POST['formInputFeldVorname'])) > 0 ? $_POST['formInputFeldVorname'] : $_SESSION['FIRSTNAME'])) {
                            $_SESSION['LASTNAME'] = $NewLastName;
                            $_SESSION['USERNAME'] = $_SESSION['FIRSTNAME']." ".$_SESSION['LASTNAME'];
                            $_SESSION['DISPLAYNAME'] = strtoupper($_SESSION['USERNAME']);
                        } else {
                            $_SESSION['profile_info'] = 'Der gewählte Name ist bereits vergeben.';
                        }
                    }
                }
            
                if (isset($_POST['formInputFeldEMail'])) {
                    $NewEMail = trim($_POST['formInputFeldEMail']);
            
                    if ($NewEMail != "" && $_SESSION['EMAIL'] != $NewEMail) {
                        $statement = $RUNTIME['PDO']->prepare('UPDATE UserAccounts SET Email = :Email WHERE PrincipalID = :PrincipalID');
                        $statement->execute(['Email' => $NewEMail, 'PrincipalID' => $_SESSION['UUID']]);
        
                        $statement = $RUNTIME['PDO']->prepare('UPDATE usersettings SET email = :Email WHERE useruuid = :PrincipalID');
                        $statement->execute(['Email' => $NewEMail, 'PrincipalID' => $_SESSION['UUID']]);
        
                        $_SESSION['EMAIL'] = $NewEMail;
                    }
                }
            
                if (isset($_POST['formInputFeldOfflineIM']) && $_POST['formInputFeldOfflineIM'] == "on") {
                    $statement = $RUNTIME['PDO']->prepare('UPDATE usersettings SET imviaemail = :IMState WHERE useruuid = :PrincipalID');
                    $statement->execute(['IMState' => 'true', 'PrincipalID' => $_SESSION['UUID']]);
                } else {
                    $statement = $RUNTIME['PDO']->prepare('UPDATE usersettings SET imviaemail = :IMState WHERE useruuid = :PrincipalID');
                    $statement->execute(['IMState' => 'false', 'PrincipalID' => $_SESSION['UUID']]);
                }

                if (isset($_POST['formInputFeldPartnerName']) && $_POST['formInputFeldPartnerName'] != "") {
                    include_once 'app/OpenSim.php';
                    $opensim = new OpenSim();

                    $NewPartner = trim($_POST['formInputFeldPartnerName']);
                    $CurrentPartner = $opensim->getPartner($_SESSION['UUID']);
            
                    if ($CurrentPartner != "") {
                        $CurrentPartner = $opensim->getUserName($CurrentPartner);
                    }
            
                    if ($NewPartner != "" && $CurrentPartner != $NewPartner) {
                        $newPartnerUUID = $opensim->getUserUUID($NewPartner);
            
                        if ($newPartnerUUID != null) {
                            $statement = $RUNTIME['PDO']->prepare('UPDATE userprofile SET profilePartner = :profilePartner WHERE useruuid = :PrincipalID');
                            $statement->execute(['profilePartner' => $newPartnerUUID, 'PrincipalID' => $_SESSION['UUID']]);
                        }
                    } else {
                        $statement = $RUNTIME['PDO']->prepare('UPDATE userprofile SET profilePartner = :profilePartner WHERE useruuid = :PrincipalID');
                        $statement->execute(['profilePartner' => '00000000-0000-0000-0000-000000000000', 'PrincipalID' => $_SESSION['UUID']]);
                    }
                }
            }
        } elseif (isset($_POST['savePassword'])) {
            $validator = new FormValidator(array(
                'oldPassword' => array('required' => true, 'regex' => '/^.{1,1000}$/'),
                'newPassword' => array('required' => true, 'regex' => '/^.{1,1000}$/'),
                'newPasswordRepeat' => array('required' => true, 'regex' => '/^.{1,1000}$/')
            ));

            if ($validator->isValid($_POST)) {
                if ($_POST['newPasswordRepeat'] == $_POST['newPassword']) {
                    if (strlen(trim($_POST['newPassword']))  >= $RUNTIME['PASSWORD_MIN_LENGTH']) {
                        if (md5(md5($_POST['oldPassword']).':'.$_SESSION['SALT']) == $_SESSION['PASSWORD']) {
                            $salt = bin2hex(random_bytes(16));
                            $hash = md5(md5(trim($_POST['newPassword'])).':'.$salt);
                            $statement = $RUNTIME['PDO']->prepare('UPDATE auth SET passwordHash = :PasswordHash, passwordSalt = :PasswordSalt WHERE UUID = :PrincipalID');
                            $statement->execute(['PasswordHash' => $hash, 'PasswordSalt' => $salt, 'PrincipalID' => $_SESSION['UUID']]);
                            $_SESSION['PASSWORD'] = $hash;
                            $_SESSION['SALT'] = $salt;
                            $_SESSION['profile_info'] = 'Neues Passwort gespeichert.';
                        } else {
                            $_SESSION['profile_info'] = 'Das alte Passwort ist nicht richtig!';
                        }
                    } else {
                        $_SESSION['profile_info'] = 'Das neue Passwort muss mindestens '.$RUNTIME['PASSWORD_MIN_LENGTH'].' Zeichen lang sein.';
                    }
                } else {
                    $_SESSION['profile_info'] = 'Die neuen Passwörter stimmen nicht überein!';
                }
            } else {
                $_SESSION['profile_info'] = 'Bitte fülle das Formular vollständig aus.';
            }
        } elseif (isset($_POST['deleteAccount'])) {
            $validator = new FormValidator(array(
                'delete-confirm-password' => array('required' => true, 'regex' => '/^.{1,1000}$/'),
                'delete-confirm' => array('required' => true, 'regex' => '/^(|on)$/')
            ));

            if ($validator->isValid($_POST)) {
                if (hash_equals(md5(md5($_POST['delete-confirm-password']).':'.$_SESSION['SALT']), $_SESSION['PASSWORD'])) {
                    $uuid = $_SESSION['UUID'];
                    include_once 'app/OpenSim.php';
                    $os = new OpenSim();
                    if ($os->deleteUser($_SESSION['UUID'])) {
                        $_SESSION['LOGIN'] = false;
                        session_destroy();
                        header('Location: index.php');
                        die();
                    } else {
                        $_SESSION['profile_info'] = 'Bei der Accountlöschung ist ein Fehler aufgetreten. Bitte versuche es später erneut.';
                    }
                }
                else {
                    $_SESSION['profile_info'] = 'Zur Bestätigung der Accountlöschung musst du dein Passwort richtig eingeben.';
                }
            }
            else {
                $_SESSION['profile_info'] = 'Um deinen Account zu löschen, ist dein aktuelles Passwort und die Bestätigung des Vorgangs erforderlich.';
            }
        }

        header('Location: index.php?page=profile');
        die();
    }

    $HTML->setHTMLTitle("Dein Profile");
    $HTML->importSeitenInhalt("profile.html");

    if ($IARRUNNING) {
        if (isset($_SESSION['iar_created'])) {
            $HTML->ReplaceSeitenInhalt("%%IARINFOMESSAGE%%", '<div class="alert alert-success" role="alert">Deine IAR wird jetzt erstellt und der Download Link wird dir per PM zugesendet.'.$APIResult.'</div>');
            unset($_SESSION['iar_created']);
        } else {
            $HTML->ReplaceSeitenInhalt("%%IARINFOMESSAGE%%", '<div class="alert alert-danger" role="alert">Aktuell wird eine IAR erstellt.<br>Warte bitte bis du eine PM bekommst.</div>');
        }
        $HTML->ReplaceSeitenInhalt("%%IARBUTTONSTATE%%", 'disabled');
    }

    include_once 'app/OpenSim.php';
    $opensim = new OpenSim();

    $PartnerUUID = $opensim->getPartner($_SESSION['UUID']);
    $PartnerName = "";

    if ($PartnerUUID != null) {
        $PartnerName = $opensim->getUserName($PartnerUUID);
    }

    if ($opensim->allowOfflineIM($_SESSION['UUID']) == "TRUE") {
        $HTML->ReplaceSeitenInhalt("%%offlineIMSTATE%%", ' checked');
    }

    $HTML->ReplaceSeitenInhalt("%%offlineIMSTATE%%", ' ');
    $HTML->ReplaceSeitenInhalt("%%firstname%%", htmlspecialchars($_SESSION['FIRSTNAME']));
    $HTML->ReplaceSeitenInhalt("%%lastname%%", htmlspecialchars($_SESSION['LASTNAME']));
    $HTML->ReplaceSeitenInhalt("%%partner%%", htmlspecialchars($PartnerName));
    $HTML->ReplaceSeitenInhalt("%%email%%", htmlspecialchars($opensim->getUserMail($_SESSION['UUID'])));
    $HTML->ReplaceSeitenInhalt("%%listAllResidentsAsJSArray%%", "");

    $profileInfo = '';
    if (isset($_SESSION['profile_info'])) {
        $profileInfo = $_SESSION['profile_info'];
        unset($_SESSION['profile_info']);
    }
    $HTML->ReplaceSeitenInhalt("%%INFOMESSAGE%%", $profileInfo);

    $HTML->ReplaceSeitenInhalt("%%IARINFOMESSAGE%%", ' ');
    $HTML->ReplaceSeitenInhalt("%%IARBUTTONSTATE%%", '');

    $HTML->build();
    echo $HTML->ausgabe();