<?
    include_once 'config.inc';
    include_once 'facebook.php';

    $user = null;

    $facebook = new Facebook(array(
        'appId'  => $app_id,
        'secret' => $app_secret,
        'cookie' => true,
    ));

    $user = $facebook->getUser();

    if($user) {

        $logoutUrl = $facebook->getLogoutUrl();

        try { // Proceed knowing you have a logged in user who's authenticated.
            $me = $facebook->api("/".$user);
            $fid = $me['id'];
            $name= $me['name'];
            toLog('USER: user_data => '.print_r($me,true),'debug',$fid);
        } catch (FacebookApiException $e) {
            toLog('Unable to retreive user('.$user.') data ('.$e.')','error');
            $user = null;
            $loginUrl = $facebook->getLoginUrl(array(
                'scope'        => 'user_likes',
                'redirect_uri' => $furl
            ));
        }
    } else {
        $loginUrl = $facebook->getLoginUrl(array(
            'scope'        => 'user_likes',
            'redirect_uri' => $furl
        ));
    }

    if($user) {
        if( $tab ) {
            $is_fan = false;
            if($signed_request = parsePageSignedRequest()) {
                $pages_match = (bool)($signed_request->page->id==$page_id);
                if($signed_request->page->liked and $pages_match) $is_fan = true;

                toLog("TAB: pages_match => ".(int)$pages_match.", is_fan => ".(int)$is_fan.", signed_request => ".print_r($signed_request,true),'debug', $fid );
            }
        }

        if( !$tab or !$pages_match ){
            // check if user is a fan
            try {
                $offset_step = 100;
                $offset= (int)$is_fan= $next= false;
                do {
                    // get teh likes from facebooks
                    $likes = $facebook->api("/$user/likes?limit=".$offset_step.(($offset)?"&offset=".$offset:""));

                    // check if searched page is on list => if yes set $is_fan to true and break;
                    foreach($likes['data'] as $like)if($like['id']==$page_id){ $is_fan=true;break; }

                    // log retrieved likes object and basc info about search conducted on this page
                    toLog("LIKES: page => ".floor($offset/$offset_step).", user_likes => ".print_r($likes,true).", searched_page => ".$page_id.", found => ".(int)$is_fan,'debug',$fid);

                    // increase offset
                    $offset+=$offset_step;

                // do it until searched page is found (user is a fan) or there's no more pages to go
                } while(!$is_fan and !empty($likes['paging']['next']));

            } catch(Exception $o) {

                // sometimes $fb->api(); i throwing errors cheerfully, here's the place they got catched
                toLog('Unable to retreive user('.$user.') likes on page '.floor($offset/$offset_step).' ('.$o.') ','error', $fid);
            }
        }

        // get user pic square
        $param  =   array(
            'method'   => 'users.getinfo',
            'uids'     => $fid,
            'fields'   => 'pic_square',
            'callback' => ''
        );
        $user_info = $facebook->api($param);
        toLog('INFO: user_info => '.print_r($user_info,true),'debug',$fid);
        save_picture($user_info[0]['pic_square'],'avatar',$fid);


        // remove all app invites:
        if(!empty($_REQUEST['request_ids'])) {
            $request_ids = explode(',', $_REQUEST['request_ids']);
            foreach($request_ids as $request_id) {
                $full_request_id = $request_id."_".$fid;
                try {
                    $deleted = $facebook->api("/$full_request_id", 'DELETE');
                    if($deleted) {
                        $_SESSION['source'] = 'fb';
                        $_SESSION['medium'] = 'invitation';
                        toLog("App request removed ($full_request_id)", 'user', ( (isset($fid)) ? $fid : -1));
                    } else toLog("Failed to remove App request ($full_request_id) [error]", 'error', ( (isset($fid)) ? $fid : -1));
                } catch (FacebookApiException $e) {
                    // logged into 'user', because isn't critical nor even important
                    toLog("Attempt to remove already removed App request ($full_request_id)", 'user', ( (isset($fid)) ? $fid : -1));
                }
            }
        }
    }

    include 'header.inc';

    if( time() <= strtotime($end) ):
        if($user): ?>
            <? if($is_fan): ?>
                <?

                $sql = "SELECT cid, fid, correct FROM ".$db_prefix."coupons WHERE fid=" . $fid . ";";
                $result = mysql_query($sql);

                $correct = false;
                if(($rows = mysql_num_rows($result)) > 0) {
                    $row = mysql_fetch_assoc($result);
                    $correct = (bool)$row['correct'];
                }

                if($correct) {
                    $coupon_id = $row['cid'];
                    $coupon_url = "cache/coupons/coupon_".$coupon_id."_".$row['fid'].".jpg";

                    toLog('User ('.$fid.') revisited his coupon ('.$coupon_id.')', 'user', $fid);
                } else {

                    // retreive coupon data for current user:
                    $user_coupon_url = $url['data']."?promotion_id=".$promotion_id."&fid=".$fid;
                    $coupon_data = file_get_contents($user_coupon_url);
                    if(!$coupon_data) {
                        toLog('Unable to retreive coupon data from '.$user_coupon_url,'error',$fid);
                        // do sth!
                    } else {

                        // process coupon data:
                        $coupon_array = json_decode($coupon_data,true);
                        $coupon_id = (string)$coupon_array['code'];

                        toLog('CDATA: coupons_data => '.print_r($coupon_array,true),'debug',$fid);

                        if($coupon_id <= 0) { // responded returning error
                            $coupon_url = false; // if unable show something instead and work in ajax to download it again
                            toLog('Invalid coupon data retreived ('.$coupon_data.')','error',$fid);

                        } elseif(($coupon_url = save_picture($coupon_array['img'], 'coupon', $fid, $coupon_id))<0) { // failed to cache coupon
                            // if unable to cache coupon show one from remote server
                            $coupon_url = $coupon_array['img'];
                            toLog('Cacheing coupon ('.$coupon_data.') failed', 'error', $fid);
                        } else {
                            if($rows == 0) {
                                $sql = "INSERT INTO ".$db_prefix."coupons (fid,cid,source,medium,new_fan) VALUES (".$fid.", '".$coupon_id."', '".$_SESSION['source']."', '".$_SESSION['medium']."', '".$_SESSION['new_fan']."');";
                                $result = mysql_query($sql);
                                if(!$result) toLog('Saving coupon('.$coupon_data.') to database failed ('.$sql.')', 'error', $fid); // failed to save to mysql
                                else toLog('User ('.$fid.') created his coupon ('.$coupon_id.')', 'user', $fid); // everything ok
                            } else {
                                $sql = "UPDATE ".$db_prefix."coupons SET cid='".$coupon_id."', correct=1 WHERE fid=".$fid." LIMIT 1;";
                                $result = mysql_query($sql);
                                if(!$result) toLog('User ('.$fid.') failed to correct his coupon ('.$coupon_id.')', 'user', $fid); // failed to write to db
                                else toLog('User ('.$fid.') corrected his coupon ('.$coupon_id.')', 'user', $fid); // everything ok
                            }

                            // remove stats data that won't be needed any more
                            session_destroy();
                        }
                    }
                }

            ?>
            <? else: ?>
                <div id="b4_layer"></div>
                <div id="b4_fan">
                    <h3>Zostań naszym fanem i odbierz rabat XX% Kliknij przycisk Lubię to.</h3>
                    <fb:like-box href="" width="292" show_faces="false" stream="false" header="false" id="facebook_like"></fb:like-box>
                    <button id="b4_fan_refresh">DALEJ</button>
                </div>
                <?
                    toLog('User ('.$fid.') was prompted to fan a page('.$page_id.')','user',$fid);
                    $_SESSION['new_fan'] = true;
                ?>
            <? endif; ?>

            <div id="coupon">

                <div id="user_data">
                    <img id="user_pic" src="cache/avatars/avatar_.jpg" border="0" />
                    <p id="user_name"><span>,</span> oto kupon rabatowy dla Ciebie:</p>
                </div>

                <a id="coupon_printable" href="#" onclick="return false;">
                    <img src="http://promocja.lpp.com.pl/kody_kreskowe/promotion_.jpg" alt="coupon" border="0" />
                </a>

                <div id="coupon_options">
                    <a id="coupon_invite" href="#">Kliknij i podaruj kupon swoim znajomym!</a>
                    <a id="coupon_print" href="#" onclick="return false;">Wydrukuj KUPON</a>
                    <? if($sms_send): ?>
                        <a id="coupon_mobile" href="#">Wyślij na komórkę</a>
                    <? endif; ?>
                    <p id="coupon_write">albo spisz kod kreskowy i podaj sprzedawcy w sklepie.</p>
                    <p id="coupon_num">
                        <span>Numer kodu:</span>
                        <b>XXXXXXXXXXXXXXXX</b>
                    </p>
                    <div style="clear:both;"></div>

                    <? if($is_fan and $sms_send): ?>
                        <p class="or">albo</p>
                        <div id="mobile_send">
                            <p id="mobile_info">Możesz także przesłać kod rabatowy na swój telefon komórkowy. Będzie zawsze pod ręką. Wystarczy, że pokażesz go sprzedawcy przy kasie.</p>

                            <p class="label"><b>Wyślij kod SMSem</b>podaj numer:</p>

                            <form action="index.php" method="post" id="mobile_form">
                                <label for="mobile_number" id="mobile_directional">+48</label>
                                <input type="text" id="mobile_number" name="mobile_number" />
                                <input type="hidden" name="fid" value="" />
                                <input type="submit" id="mobile_submit" value="Wyślij" />
                            </form>
                             <p id="mobile_permissions">Wpisując numer telefonu oraz klikając „Wyślij”, zgodnie z zapisami ustawy o świadczeniu usług drogą elektroniczną z dnia 18 lipca 2002 r., wyrażam zgodę na świadczenie przez LPP S.A. usług drogą elektroniczną oraz na dostarczanie mi informacji handlowej o produktach i usługach własnych jak i produktach i usługach kontrahentów Reserved za pośrednictwem udostępnionego przeze mnie numeru telefonu komórkowego.</p>
                        </div>
                    <? endif; ?>

                    <? if($is_fan and $subscribe): ?>
                        <div id="add_news">
                            <p><strong>Chcesz jako pierwszy/a otrzymywać informacje o naszych promocjach i nowościach?</strong><br> Zapisz się do newslettera!</p>
                            <form id="subscribe_form" method="post" action="index.php">
                                <label for="email">e-mail:</label>
                                <input type="text" name="email" id="email" />
                                <input type="hidden" name="fid" value="" />
                                <input type="submit" value="Wyślij" id="email_submit" />
                            </form>
                            <div style="display:none;"  id="info" class="info">Dziękujemy za zapisanie się do newslettera.</div>
                            <div style="display:none;"  id="error" class="info">Spróbuj jeszcze raz później.</div>
                        </div>
                    <? endif; ?>

                    <div class="clear"></div>
                </div>
                <div id="info_invs" style="display: none;">Zaproszenia zostały wysłane!</div>
            </div>

        <? else: ?>
            <div id="b4_install">
                <a href="" id="app_install">
                    <img src="images/header.png" alt="pobierz kupon" border="0" />
                </a>
            </div>
            <? toLog('User ('.(isset($fid)?$fid:'unknown yet :[').') has visited landing page ('.$furl.')','user',(isset($fid)?$fid:-1)); ?>
        <? endif; ?>
    <? else: ?>
        <div id="finished">
            <img src="../logo.jpg" alt="" width="100" height="100" />
            <h2>Promocja zakończona.</h2>
            <p>Dziękujemy za udział w akcji i zapraszamy do odwiedzenia naszego <a href="" class="ext">profilu na Facebooku</a></p>
        </div>
    <? endif;

    include 'footer.inc';
?>