<?php
declare(strict_types=1);

require_once 'includes/config.php';
require_once 'includes/functions.php';

$cur_user  = get_session_user();
$lists     = get_public_lists(200);
$users_idx = read_json(USERS_INDEX);

// Group by owner, track latest updated per owner
$by_owner      = [];
$owner_updated = [];
foreach ($lists as $lst) {
    $u = $lst['owner'];
    $by_owner[$u][] = $lst;
    $ts = strtotime($lst['updated'] ?? '');
    if ($ts && $ts > ($owner_updated[$u] ?? 0)) {
        $owner_updated[$u] = $ts;
    }
}

// Sort owners by most recently modified list, descending
uksort($by_owner, fn($a, $b) => ($owner_updated[$b] ?? 0) - ($owner_updated[$a] ?? 0));

$page_title = 'Public Directory';
require_once 'includes/header.php';
?>

<div class="page-wrap-wide" style="margin-top:12px; margin-bottom:16px;">

    <div class="window">
        <div class="window-title">
            <span>Public To-Do List Directory</span>
            <span style="font-size:11px;opacity:.8;"><?= count($lists) ?> public list<?= count($lists) !== 1 ? 's' : '' ?></span>
        </div>
        <div class="window-body">

            <?php if (empty($lists)): ?>
                <div class="text-center" style="padding:24px; color:var(--chrome-dark);">
                    No public lists yet. <?= $cur_user ? '<a href="dashboard.php">Create one!</a>' : '<a href="index.php">Sign in</a> to create lists.' ?>
                </div>
            <?php else: ?>

                <?php foreach ($by_owner as $username => $owner_lists): ?>
                <?php
                    $display_name = $users_idx[$username]['display_name'] ?? $username;
                    $avatar_url   = get_user_avatar_url($username);
                    $latest_ts    = $owner_updated[$username] ?? 0;
                ?>
                <div style="margin-bottom:18px;">
                    <!-- Owner header -->
                    <div class="section-title" style="display:flex; align-items:center; gap:8px; flex-wrap:wrap;">
                        <?php if ($avatar_url !== ''): ?>
                            <a href="profile.php?user=<?= h($username) ?>">
                                <img src="<?= h($avatar_url) ?>" alt=""
                                     style="width:32px; height:32px; object-fit:cover; border:2px solid var(--chrome-dark); flex-shrink:0; display:block;">
                            </a>
                        <?php else: ?>
                            <span style="width:32px; height:32px; background:var(--chrome-mid); border:2px solid var(--chrome-dark); display:flex; align-items:center; justify-content:center; flex-shrink:0; font-size:16px; color:var(--chrome-dark);">&#128100;</span>
                        <?php endif; ?>
                        <div>
                            <a href="profile.php?user=<?= h($username) ?>"
                               style="color:var(--title-start); text-decoration:none; font-size:13px; font-weight:bold;">
                                <?= h($display_name) ?>
                            </a>
                            <span style="font-size:11px; font-weight:normal; color:var(--chrome-dark);">
                                &nbsp;@<?= h($username) ?>
                            </span>
                            <?php if ($latest_ts): ?>
                            <span style="font-size:10px; font-weight:normal; color:var(--chrome-dark); margin-left:8px;">
                                &mdash; last updated <?= date('d M Y', $latest_ts) ?>
                            </span>
                            <?php endif; ?>
                        </div>
                    </div>

                    <!-- Lists grid -->
                    <div class="list-grid">
                        <?php foreach ($owner_lists as $lst): ?>
                        <div class="list-card">
                            <div class="list-card-title">
                                <a href="<?= h(list_url($username, $lst['id'])) ?>"><?= h($lst['title']) ?></a>
                                <span class="badge badge-pub">PUBLIC</span>
                                <?php if (!empty($lst['password_hash'])): ?>
                                    <span class="badge" style="background:#774400;color:#fff;" title="Password protected">&#128274;</span>
                                <?php endif; ?>
                            </div>
                            <div class="list-card-body">
                                <?= $lst['description'] ? h($lst['description']) : '<em style="color:var(--chrome-dark)">No description</em>' ?>
                            </div>
                            <div class="list-card-footer">
                                <span class="task-counts">
                                    <span title="Active" style="color:var(--normal);">&#9632; <?= $lst['active_count'] ?></span>
                                    &nbsp;
                                    <span title="Completed" style="color:var(--low);">&#10003; <?= $lst['completed_count'] ?></span>
                                </span>
                                <span style="font-size:10px;color:var(--chrome-dark);">
                                    <?= date('d M Y', strtotime($lst['updated'])) ?>
                                </span>
                                <div class="d-flex gap-4">
                                    <a href="<?= h(list_url($username, $lst['id'])) ?>" class="btn btn-sm">View</a>
                                    <a href="print.php?id=<?= h($lst['id']) ?>&amp;owner=<?= h($username) ?>"
                                       class="btn btn-sm" target="_blank">Print</a>
                                </div>
                            </div>
                        </div>
                        <?php endforeach; ?>
                    </div>
                </div>
                <?php endforeach; ?>

            <?php endif; ?>
        </div>
    </div>

</div>

<?php require_once 'includes/footer.php'; ?>