<?php
/**
 * Holds the account section controller.
 * @package Sakura
 */

namespace Sakura\Controllers\Settings;

use Sakura\CurrentSession;
use Sakura\DB;
use Sakura\Perms\Site;

/**
 * Account settings.
 * @package Sakura
 * @author Julian van de Groep <me@flash.moe>
 */
class AccountController extends Controller
{
    /**
     * Renders the profile changing page.
     * @return string
     */
    public function profile()
    {
        // Check permission
        if (!CurrentSession::$user->permission(Site::ALTER_PROFILE)) {
            $message = "You aren't allowed to edit your profile!";
            $redirect = route('settings.index');
            return view('global/information', compact('message', 'redirect'));
        }

        if (session_check()) {
            $redirect = route('settings.account.profile');
            $save = [];
            $allowed = [
                'website',
                'twitter',
                'github',
                'skype',
                'discord',
                'youtube',
                'steam',
                'osu',
                'lastfm',
            ];

            foreach ($allowed as $field) {
                $save["user_{$field}"] = $_POST["profile_{$field}"] ?? null;
            }

            DB::table('users')
                ->where('user_id', CurrentSession::$user->id)
                ->update($save);

            // Birthdays
            if (isset($_POST['birthday_day'], $_POST['birthday_month'], $_POST['birthday_year'])) {
                $day = intval($_POST['birthday_day']);
                $month = intval($_POST['birthday_month']);
                $year = intval($_POST['birthday_year']);

                if (!$day && !$month && !$year) {
                    $birthdate = null;
                } else {
                    if (!checkdate($month, $day, $year ? $year : 1)
                        || $year > date("Y")
                        || ($year != 0 && $year < (date("Y") - 100))) {
                        $message = "Your birthdate was invalid, everything else was saved though!";

                        return view('global/information', compact('message', 'redirect'));
                    }

                    // Combine it into a YYYY-MM-DD format
                    $birthdate = implode('-', compact('year', 'month', 'day'));
                }

                DB::table('users')
                    ->where('user_id', CurrentSession::$user->id)
                    ->update([
                        'user_birthday' => $birthdate,
                    ]);
            }

            header("Location: {$redirect}");
            return;
        }

        return view('settings/account/profile');
    }

    /**
     * Details such as email, username and password.
     * @return string
     */
    public function details()
    {
        $user = CurrentSession::$user;

        // Check permissions
        $edit_email = $user->permission(Site::CHANGE_EMAIL);
        $edit_usern = $user->permission(Site::CHANGE_USERNAME);
        $edit_title = $user->permission(Site::CHANGE_USERTITLE);
        $edit_passw = $user->permission(Site::CHANGE_PASSWORD);
        $last_name_change = 0;

        if ($edit_usern) {
            $last_name_change = $user->getUsernameHistory()[0]->change_time ?? 0;
        }

        // Check eligibility for username changes
        $username_allow = $edit_usern && (time() - $last_name_change) > 2592000;

        if (isset($_POST['session']) && session_check()) {
            $redirect = route('settings.account.details');
            $email = $_POST['email'] ?? null;

            if ($email) {
                // Validate e-mail address
                if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
                    $message = "The e-mail address you supplied is invalid!";
                    return view('global/information', compact('redirect', 'message'));
                }

                // Check the MX record of the email
                if (!check_mx_record($email)) {
                    $message = 'No valid MX-Record found on the e-mail address you supplied.';
                    return view('global/information', compact('redirect', 'message'));
                }

                // Check if the e-mail has already been used
                $emailCheck = DB::table('users')
                    ->where('email', $email)
                    ->count();
                if ($emailCheck) {
                    $message = 'Someone already used this e-mail!';
                    return view('global/information', compact('redirect', 'message'));
                }

                $user->setMail($email);
            }

            $username = $_POST['username'] ?? null;

            if ($username) {
                $username_clean = clean_string($username, true);

                // Check if the username is too short
                if (strlen($username_clean) < config('user.name_min')) {
                    $message = "This username is too short!";
                    return view('global/information', compact('redirect', 'message'));
                }

                // Check if the username is too long
                if (strlen($username_clean) > config('user.name_max')) {
                    $message = "This username is too long!";
                    return view('global/information', compact('redirect', 'message'));
                }

                // Check if this username hasn't been used in the last amount of days set in the config
                $getOld = DB::table('username_history')
                    ->where('username_old_clean', $username_clean)
                    ->where('change_time', '>', (config('user.name_reserve') * 24 * 60 * 60))
                    ->orderBy('change_id', 'desc')
                    ->first();

                // Check if anything was returned
                if ($getOld && $getOld->user_id != $user->id) {
                    $message = "The username you tried to use is reserved, try again later!";
                    return view('global/information', compact('redirect', 'message'));
                }

                // Check if the username is already in use
                $getInUse = DB::table('users')
                    ->where('username_clean', $username_clean)
                    ->count();

                // Check if anything was returned
                if ($getInUse) {
                    $message = "Someone is already using this name!";
                    return view('global/information', compact('redirect', 'message'));
                }

                $user->setUsername($username);
            }

            $title = $_POST['title'] ?? null;

            if ($title) {
                if (strlen($title) > 64) {
                    $message = "This title is too long!";
                    return view('global/information', compact('redirect', 'message'));
                }

                if ($title !== $user->title) {
                    // Update database
                    DB::table('users')
                        ->where('user_id', $user->id)
                        ->update([
                            'user_title' => $title,
                        ]);
                }
            }

            $password = $_POST['password'] ?? null;

            if ($password) {
                // Check password entropy
                if (password_entropy($password) < config('user.pass_min_entropy')) {
                    $message = "Your password isn't strong enough!";
                    return view('global/information', compact('redirect', 'message'));
                }

                $user->setPassword($password);
            }

            header("Location: {$redirect}");
            return;
        }

        return view('settings/account/details', compact(
            'edit_email',
            'edit_usern',
            'edit_title',
            'edit_passw',
            'last_name_change',
            'username_allow'
        ));
    }

    /**
     * Renders the rank management page.
     * @return string
     */
    public function ranks()
    {
        // Check permission
        if (!CurrentSession::$user->permission(Site::ALTER_RANKS)) {
            $message = "You aren't allowed to manage your ranks.";
            $redirect = route('settings.index');
            return view('global/information', compact('redirect', 'message'));
        }

        $rank = $_POST['rank'] ?? null;
        $mode = $_POST['mode'] ?? null;

        $locked = [
            config('rank.inactive'),
            config('rank.regular'),
            config('rank.premium'),
            config('rank.alumni'),
            config('rank.banned'),
        ];

        if (session_check() && $rank && $mode) {
            $redirect = route('settings.account.ranks');

            // Check if user has this rank
            if (!CurrentSession::$user->hasRanks([$rank])) {
                $message = "You aren't a part of this rank!";
                return view('global/information', compact('redirect', 'message'));
            }

            if ($mode == 'remove') {
                if (in_array($rank, $locked)) {
                    $message = "You aren't allowed to remove this rank from your account!";
                    return view('global/information', compact('redirect', 'message'));
                }

                CurrentSession::$user->removeRanks([$rank]);

                $message = "Removed the rank from your account!";
                return view('global/information', compact('redirect', 'message'));
            }

            CurrentSession::$user->setMainRank($rank);

            header("Location: {$redirect}");
            return;
        }

        return view('settings/account/ranks', compact('locked'));
    }
}