<?php
define('MSZ_WARN_NOTE', 0);
define('MSZ_WARN_SILENCE', 1);
define('MSZ_WARN_BAN', 2);

define('MSZ_WARN_TYPES', [
    MSZ_WARN_NOTE, MSZ_WARN_SILENCE, MSZ_WARN_BAN,
]);

function user_warning_add(
    int $userId,
    string $userIp,
    int $issuerId,
    string $issuerIp,
    int $type,
    string $publicNote,
    string $privateNote
): int {
    if (!in_array($type, MSZ_WARN_TYPES, true)) {
        return -1;
    }

    $addWarning = db_prepare('
        INSERT INTO `msz_user_warnings`
            (`user_id`, `user_ip`, `issuer_id`, `issuer_ip`, `warning_type`, `warning_note`, `warning_note_private`)
        VALUES
            (:user_id, INET6_ATON(:user_ip), :issuer_id, INET6_ATON(:issuer_ip), :type, :note, :note_private)
    ');
    $addWarning->bindValue('user_id', $userId);
    $addWarning->bindValue('user_ip', $userIp);
    $addWarning->bindValue('issuer_id', $issuerId);
    $addWarning->bindValue('issuer_ip', $issuerIp);
    $addWarning->bindValue('type', $type);
    $addWarning->bindValue('note', $publicNote);
    $addWarning->bindValue('note_private', $privateNote);

    if (!$addWarning->execute()) {
        return 0;
    }

    return (int)db_last_insert_id();
}

function user_warning_count(int $userId): int
{
    if ($userId < 1) {
        return 0;
    }

    $countWarnings = db_prepare('
        SELECT COUNT(`warning_id`)
        FROM `msz_user_warnings`
        WHERE `user_id` = :user_id
    ');
    $countWarnings->bindValue('user_id', $userId);
    return (int)($countWarnings->execute() ? $countWarnings->fetchColumn() : 0);
}

function user_warning_remove(int $warningId): bool
{
    if ($warningId < 1) {
        return false;
    }

    $removeWarning = db_prepare('
        DELETE FROM `msz_user_warnings`
        WHERE `warning_id` = :warning_id
    ');
    $removeWarning->bindValue('warning_id', $warningId);
    return $removeWarning->execute();
}

function user_warning_fetch(
    int $userId,
    ?int $days = null
): array {
    $fetchWarnings = db_prepare(sprintf(
        '
            SELECT
                uw.`warning_id`, uw.`warning_created`, uw.`warning_type`, uw.`warning_note`,
                uw.`warning_note_private`, uw.`user_id`, uw.`issuer_id`,
                INET6_NTOA(uw.`user_ip`) AS `user_ip`, INET6_NTOA(uw.`issuer_ip`) AS `issuer_ip`,
                iu.`username` AS `issuer_username`
            FROM `msz_user_warnings` AS uw
            LEFT JOIN `msz_users` AS iu
            ON iu.`user_id` = uw.`issuer_id`
            WHERE uw.`user_id` = :user_id
            %s
        ',
        $days !== null ? 'AND uw.`warning_created` >= NOW() - INTERVAL :days DAY' : ''
    ));
    $fetchWarnings->bindValue('user_id', $userId);

    if ($days !== null) {
        $fetchWarnings->bindValue('days', $days);
    }

    $warnings = $fetchWarnings->execute() ? $fetchWarnings->fetchAll(PDO::FETCH_ASSOC) : false;
    return $warnings ? $warnings : [];
}