<?php
declare(strict_types=1);

header('Content-Type: application/json; charset=utf-8');
header('Cache-Control: no-store');

require __DIR__ . '/im_web_bootstrap.php';

$payload = readJsonPayload();
$userId = trim((string)($payload['userId'] ?? ''));
$targetId = trim((string)($payload['targetId'] ?? $payload['friendUid'] ?? ''));
$alias = trim((string)($payload['alias'] ?? ''));

if ($userId === '') {
    respond(400, '缺少用户ID');
}
if ($targetId === '') {
    respond(400, '缺少联系人ID');
}
if ($targetId === $userId) {
    respond(400, '不能给自己设置备注名');
}
if (mb_strlen($alias, 'UTF-8') > 32) {
    respond(400, '备注名不能超过32个字');
}

try {
    ensureWebImAppTables();
    $imDb = imDb();
    $exists = $imDb->prepare('select 1 from `t_user` where `_uid` = ? limit 1');
    $exists->execute([$targetId]);
    if (!$exists->fetchColumn()) {
        respond(404, '没有找到该用户');
    }

    $friend = $imDb->prepare('select 1 from `t_friend` where `_uid` = ? and `_friend_uid` = ? limit 1');
    $friend->execute([$userId, $targetId]);
    $isContact = (bool)$friend->fetchColumn();

    if ($isContact) {
        requireImSuccess(
            imAdminPost('/admin/friend/set_alias', [
                'operator' => $userId,
                'targetId' => $targetId,
                'alias' => $alias,
            ]),
            '备注名修改失败'
        );
    }
    saveWebUserRemark(imAppDb(), $userId, $targetId, $alias);

    respond(0, 'success', [
        'contact' => [
            'uid' => $targetId,
            'alias' => $alias,
            'isContact' => $isContact,
        ],
    ]);
} catch (Throwable $error) {
    respond(500, $error->getMessage() ?: '备注名服务暂不可用');
}