<?php
// Admin: add / rename / reorder / lock / delete forums.
require_once __DIR__ . '/../lib/bootstrap.php';
$me = require_admin();
$d = db();

$msg = ''; $err = '';
$edit = (int)($_GET['edit'] ?? 0);

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    require_csrf();
    $act = $_POST['act'] ?? '';
    $fid = (int)($_POST['fid'] ?? 0);

    if ($act === 'add') {
        $n = mb_substr(trim((string)($_POST['name'] ?? '')), 0, 60);
        if ($n === '') $err = 'Forum name required.';
        else {
            $d->prepare("INSERT INTO forums (name,descr,sort_order) VALUES (?,?,?)")
              ->execute([$n, mb_substr(trim((string)($_POST['descr'] ?? '')), 0, 120),
                         (int)($_POST['sort_order'] ?? 0)]);
            $msg = 'Forum "' . $n . '" created.';
        }
    } elseif ($act === 'save' && $fid) {
        $n = mb_substr(trim((string)($_POST['name'] ?? '')), 0, 60);
        if ($n === '') $err = 'Forum name required.';
        else {
            $d->prepare("UPDATE forums SET name=?,descr=?,sort_order=?,is_locked=? WHERE id=?")
              ->execute([$n, mb_substr(trim((string)($_POST['descr'] ?? '')), 0, 120),
                         (int)($_POST['sort_order'] ?? 0),
                         (int)($_POST['is_locked'] ?? 0), $fid]);
            $msg = 'Forum saved.';
        }
    } elseif ($act === 'del' && $fid) {
        // ON DELETE CASCADE removes its topics and their posts
        $d->prepare("DELETE FROM forums WHERE id=?")->execute([$fid]);
        $msg = 'Forum and all its topics deleted.';
        $edit = 0;
    }
}

page_start('Admin: forums', ['back' => '/admin/index.php']);
if ($err) p_err($err);
if ($msg) p_ok($msg);

if ($edit) {
    $s = $d->prepare("SELECT * FROM forums WHERE id=?");
    $s->execute([$edit]);
    $f = $s->fetch();
    if (!$f) bail('Admin', 'No such forum.', '/admin/forums.php');
    p_para('Editing forum #' . $f['id']);
    p_form('/admin/forums.php?edit=' . $edit, [
        ['name' => 'act', 'type' => 'hidden', 'value' => 'save'],
        ['name' => 'fid', 'type' => 'hidden', 'value' => (string)$f['id']],
        ['name' => 'name',  'label' => 'Name',  'value' => $f['name'],  'maxlength' => 60],
        ['name' => 'descr', 'label' => 'Description', 'value' => $f['descr'], 'maxlength' => 120],
        ['name' => 'sort_order', 'label' => 'Sort order', 'value' => (string)$f['sort_order'],
         'maxlength' => 4, 'format' => '*N'],
        ['name' => 'is_locked', 'label' => 'Locked', 'type' => 'select',
         'value' => (string)$f['is_locked'], 'options' => ['0' => 'no', '1' => 'yes']],
    ], 'Save forum');
    p_form('/admin/forums.php', [
        ['name' => 'act', 'type' => 'hidden', 'value' => 'del'],
        ['name' => 'fid', 'type' => 'hidden', 'value' => (string)$f['id']],
    ], 'DELETE forum');
    p_links([['/admin/forums.php', 'Back to forum list']]);
    page_end();
    exit;
}

$rows = $d->query("SELECT f.*, (SELECT COUNT(*) FROM topics t WHERE t.forum_id=f.id) tc
                   FROM forums f ORDER BY f.sort_order, f.id")->fetchAll();
foreach ($rows as $r) {
    p_link('/admin/forums.php', '#' . $r['id'] . ' ' . $r['name'] . ' (' . $r['tc'] . 't)'
           . ($r['is_locked'] ? ' [locked]' : ''), ['edit' => $r['id']]);
}
if (!$rows) p_para('No forums.');
p_rule();
p_para('Add a forum:');
p_form('/admin/forums.php', [
    ['name' => 'act', 'type' => 'hidden', 'value' => 'add'],
    ['name' => 'name',  'label' => 'Name', 'maxlength' => 60],
    ['name' => 'descr', 'label' => 'Description', 'maxlength' => 120],
    ['name' => 'sort_order', 'label' => 'Sort order', 'value' => '0',
     'maxlength' => 4, 'format' => '*N'],
], 'Add forum');
p_links([['/admin/index.php', 'Admin home']]);
page_end();