<?php
/*
 * Sakura Authentication Page
 */

// Declare Namespace
namespace Sakura;

// Include components
require_once str_replace(basename(__DIR__), '', dirname(__FILE__)) .'_sakura/sakura.php';

// Page actions
if(isset($_REQUEST['mode'])) {

    // Continue
    $continue = true;

    // Make sure we're not in activate mode since adding a timestamp and accessing the PHP session id is kind of hard when you're in an e-mail client
    if(!isset($_REQUEST['mode']) || $_REQUEST['mode'] != 'activate') {

        // Compare time and session so we know the link isn't forged
        if(!isset($_REQUEST['time']) || $_REQUEST['time'] < time() - 1000) {

            $renderData['page'] = [
                'title'     => 'Action failed',
                'redirect'  => '/authenticate',
                'message'   => 'Timestamps differ too much, refresh the page and try again.',
                'success'   => 0
            ];

            // Prevent
            $continue = false;

        }

        // Match session ids for the same reason
        if(!isset($_REQUEST['session']) || $_REQUEST['session'] != session_id()) {

            $renderData['page'] = [
                'title'     => 'Action failed',
                'redirect'  => '/authenticate',
                'message'   => 'Invalid session, please try again.',
                'success'   => 0
            ];

            // Prevent
            $continue = false;

        }

    }

    // Login check
    if(Users::checkLogin()) {

        if(!in_array($_REQUEST['mode'], ['logout', 'legacypw'])) {
            $continue = false;

            // Add page specific things
            $renderData['page'] = [
                'title'     => 'Authentication',
                'redirect'  => '/',
                'message'   => 'You are already authenticated. Redirecting...',
                'success'   => 1
            ];
        }

    }

    if($continue) {

        switch($_REQUEST['mode']) {

            case 'logout':

                // Attempt logout
                $logout = Users::logout();

                // Add page specific data
                $renderData['page'] = [
                    'title'     => 'Logout',
                    'redirect'  => ($logout ? $_REQUEST['redirect'] : '/authenticate'),
                    'message'   => $logout ? 'You are now logged out.' : 'An unknown error occurred.',
                    'success'   => $logout ? 1 : 0
                ];

                break;

            case 'legacypw':

                // Attempt change
                $legacypass = Users::changeLegacy($_REQUEST['oldpw'], $_REQUEST['newpw'], $_REQUEST['verpw']);

                // Array containing "human understandable" messages
                $messages = [
                    'USER_NOT_LOGIN'        => 'What are you doing, you\'re not even logged in. GO AWAY!',
                    'INCORRECT_PASSWORD'    => 'The password you entered was invalid.',
                    'NOT_ALLOWED'           => 'Your account does not have the required permissions to change your password.',
                    'NO_LOGIN'              => 'Logging into this account is disabled.',
                    'PASS_TOO_SHIT'         => 'Your password is too weak, try adding some special characters.',
                    'PASS_NOT_MATCH'        => 'Passwords do not match.',
                    'SUCCESS'               => 'Successfully changed your password, you may now continue.'
                ];

                // Add page specific things
                $renderData['page'] = [
                    'title'     => 'Change Password',
                    'redirect'  => '/',
                    'message'   => $messages[$legacypass[1]],
                    'success'   => $legacypass[0]
                ];

                break;

            case 'changepassword':

                // Attempt change
                $passforget = Users::resetPassword($_REQUEST['verk'], $_REQUEST['uid'], $_REQUEST['newpw'], $_REQUEST['verpw']);

                // Array containing "human understandable" messages
                $messages = [
                    'INVALID_VERK'      => 'The verification key supplied was invalid!',
                    'INVALID_CODE'      => 'Invalid verification key, if you think this is an error contact the administrator.',
                    'INVALID_USER'      => 'The used verification key is not designated for this user.',
                    'VERK_TOO_SHIT'     => 'Your verification code is too weak, try adding some special characters.',
                    'PASS_TOO_SHIT'     => 'Your password is too weak, try adding some special characters.',
                    'PASS_NOT_MATCH'    => 'Passwords do not match.',
                    'SUCCESS'           => 'Successfully changed your password, you may now log in.'
                ];

                // Add page specific things
                $renderData['page'] = [
                    'title'     => 'Forgot Password',
                    'redirect'  => ($passforget[0] ? '/' : $_SERVER['PHP_SELF'] .'?pw=true&uid='. $_REQUEST['uid'] .'&verk='. $_REQUEST['verk']),
                    'message'   => $messages[$passforget[1]],
                    'success'   => $passforget[0]
                ];

                break;

            // Activating accounts
            case 'activate':

                // Attempt activation
                $activate = Users::activateUser($_REQUEST['u'], true, $_REQUEST['k']);

                // Array containing "human understandable" messages
                $messages = [
                    'USER_NOT_EXIST'        => 'The user you tried to activate does not exist.',
                    'USER_ALREADY_ACTIVE'   => 'The user you tried to activate is already active.',
                    'INVALID_CODE'          => 'Invalid activation code, if you think this is an error contact the administrator.',
                    'INVALID_USER'          => 'The used activation code is not designated for this user.',
                    'SUCCESS'               => 'Successfully activated your account, you may now log in.'
                ];

                // Add page specific things
                $renderData['page'] = [
                    'title'     => 'Activate account',
                    'redirect'  => '/authenticate',
                    'message'   => $messages[$activate[1]],
                    'success'   => $activate[0]
                ];

                break;

            // Resending the activation e-mail
            case 'resendactivemail':

                // Attempt send
                $resend = Users::resendActivationMail($_REQUEST['username'], $_REQUEST['email']);

                // Array containing "human understandable" messages
                $messages = [
                    'AUTH_LOCKED'           => 'Authentication is currently not allowed, try again later.',
                    'USER_NOT_EXIST'        => 'The user you tried to activate does not exist (confirm the username/email combination).',
                    'USER_ALREADY_ACTIVE'   => 'The user you tried to activate is already active.',
                    'SUCCESS'               => 'The activation e-mail has been sent to the address associated with your account.'
                ];

                // Add page specific things
                $renderData['page'] = [
                    'title'     => 'Resend Activation',
                    'redirect'  => '/authenticate',
                    'message'   => $messages[$resend[1]],
                    'success'   => $resend[0]
                ];

                break;

            // Login processing
            case 'login':

                // Attempt login
                $login = Users::login($_REQUEST['username'], $_REQUEST['password'], isset($_REQUEST['remember']));

                // Array containing "human understandable" messages
                $messages = [
                    'AUTH_LOCKED'           => 'Authentication is currently not allowed, try again later.',
                    'USER_NOT_EXIST'        => 'The user you tried to log into does not exist.',
                    'INCORRECT_PASSWORD'    => 'The password you entered was invalid.',
                    'NOT_ALLOWED'           => 'Your account does not have the required permissions to log in.',
                    'NO_LOGIN'              => 'Logging into this account is disabled.',
                    'LEGACY_SUCCESS'        => 'Login successful! Taking you to the password changing page...',
                    'LOGIN_SUCESS'          => 'Login successful!'
                ];

                // Add page specific things
                $renderData['page'] = [
                    'title'     => 'Login',
                    'redirect'  => ($login[1] == 'LEGACY_SUCCESS' ? '/authenticate?legacy=true' : ($login[0] ? $_REQUEST['redirect'] : '/authenticate')),
                    'message'   => $messages[$login[1]],
                    'success'   => $login[0]
                ];

                break;

            // Registration processing
            case 'register':

                // Attempt registration
                $register = Users::register(
                    $_REQUEST['username'],
                    $_REQUEST['password'],
                    $_REQUEST['confirmpassword'],
                    $_REQUEST['email'],
                    isset($_REQUEST['tos']),
                    (
                        Configuration::getConfig('recaptcha') ?
                        $_REQUEST['g-recaptcha-response'] :
                        null
                    ),
                    (
                        Configuration::getConfig('require_registration_code') ?
                        $_REQUEST['registercode'] :
                        null
                    )
                );

                // Array containing "human understandable" messages
                $messages = [
                    'AUTH_LOCKED'       => 'Authentication is currently not allowed, try again later.',
                    'DISABLED'          => 'Registration is currently disabled.',
                    'INVALID_REG_KEY'   => 'The given registration code was invalid.',
                    'TOS'               => 'You are required to agree to the Terms of Service.',
                    'CAPTCHA_FAIL'      => 'Captcha verification failed, please try again.',
                    'USER_EXISTS'       => 'A user with this username already exists, if you lost your password try using the Lost Password form.',
                    'NAME_TOO_SHORT'    => 'Your name must be at least 3 characters long.',
                    'NAME_TOO_LONG'     => 'Your name can\'t be longer than 16 characters.',
                    'PASS_TOO_SHIT'     => 'Your password is too weak, try adding some special characters.',
                    'PASS_NOT_MATCH'    => 'Passwords do not match.',
                    'INVALID_EMAIL'     => 'Your e-mail address is formatted incorrectly.',
                    'INVALID_MX'        => 'No valid MX-Record found on the e-mail address you supplied.',
                    'EMAILSENT'         => 'Your registration went through! An activation e-mail has been sent.',
                    'SUCCESS'           => 'Your registration went through! Welcome to '. Configuration::getConfig('sitename') .'!'
                ];

                // Add page specific things
                $renderData['page'] = [
                    'title'     => 'Register',
                    'redirect'  => ($register[0] ? '/' : '/authenticate'),
                    'message'   => $messages[$register[1]],
                    'success'   => $register[0]
                ];

                break;

            // Unforgetting passwords
            case 'forgotpassword':

                // Attempt send
                $passforgot = Users::sendPasswordForgot($_REQUEST['username'], $_REQUEST['email']);

                // Array containing "human understandable" messages
                $messages = [
                    'AUTH_LOCKED'           => 'Authentication is currently not allowed, try again later.',
                    'USER_NOT_EXIST'        => 'The requested user does not exist (confirm the username/email combination).',
                    'NOT_ALLOWED'           => 'Your account does not have the required permissions to change your password.',
                    'SUCCESS'               => 'The password reset e-mail has been sent to the address associated with your account.'
                ];

                // Add page specific things
                $renderData['page'] = [
                    'title'     => 'Lost Password',
                    'redirect'  => '/authenticate',
                    'message'   => $messages[$passforgot[1]],
                    'success'   => $passforgot[0]
                ];

                break;

        }

    }

    // Print page contents or if the AJAX request is set only display the render data
    print   isset($_REQUEST['ajax']) ?
            (
                $renderData['page']['title']
                . '|'
                . $renderData['page']['message']
                . '|'
                . $renderData['page']['success']
                . '|'
                . $renderData['page']['redirect']
            ) :
            Templates::render('errors/information.tpl', $renderData);
    exit;

}

// Add page specific things
$renderData['page'] = [
    'title' => 'Authentication'
];
$renderData['auth'] = [

    'redirect' => isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : '/',
    'blockRegister' => [

        'do' => false
        
    ]

];

// Check if the user is already logged in
if(Users::checkLogin()) {

    // If password forgot things are set display password forget thing
    if(isset($_REQUEST['legacy']) && $_REQUEST['legacy'] && Users::getUser(Session::$userId)['password_algo'] == 'legacy') {

        $renderData['page']['title']        = 'Changing Password';
        $renderData['auth']['changingPass'] = true;

        print Templates::render('main/legacypasswordchange.tpl', $renderData);
        exit;

    }

    // Add page specific things
    $renderData['page'] = [
        'title'     => 'Authentication',
        'redirect'  => '/',
        'message'   => 'You are already logged in, log out to access this page.'
    ];

    print Templates::render('errors/information.tpl', $renderData);
    exit;

}

// Check if a user has already registered from the current IP address
if(count($regUserIP = Users::getUsersByIP(Main::getRemoteIP()))) {

    $renderData['auth']['blockRegister'] = [
        'do'        => true,
        'username'  => $regUserIP[array_rand($regUserIP)]['username']
    ];

}

// If password forgot things are set display password forget thing
if(isset($_REQUEST['pw']) && $_REQUEST['pw']) {

    $renderData['page']['title']        = 'Resetting Password';
    $renderData['auth']['changingPass'] = true;
    $renderData['auth']['userId']       = $_REQUEST['uid'];

    if(isset($_REQUEST['key']))
        $renderData['auth']['forgotKey'] = $_REQUEST['key'];

    print Templates::render('main/forgotpassword.tpl', $renderData);
    exit;

}

// Print page contents
print Templates::render('main/authenticate.tpl', $renderData);