<?php
require_once __DIR__ . '/../ai/LocalAIApi.php';

function moderateContent($content) {
    if (empty(trim($content))) return ['is_safe' => true];

    // Bypass moderation for video platforms as they are handled by their own safety measures
    // and often trigger false positives in AI moderation due to "lack of context".
    if (preg_match('/(?:https?:\/\/)?(?:www\.)?(?:youtube\.com|youtu\.be|dailymotion\.com|dai\.ly|vimeo\.com)\//i', $content)) {
        return ['is_safe' => true];
    }

    $resp = LocalAIApi::createResponse([
        'input' => [
            ['role' => 'system', 'content' => 'You are a content moderator. Analyze the message and return a JSON object with "is_safe" (boolean) and "reason" (string, optional). Safe means no hate speech, extreme violence, or explicit sexual content. Do not flag URLs as unsafe simply because you cannot see the content behind them.'],
            ['role' => 'user', 'content' => $content],
        ],
    ]);

    if (!empty($resp['success'])) {
        $result = LocalAIApi::decodeJsonFromResponse($resp);
        if ($result && isset($result['is_safe'])) {
            return $result;
        }
    }

    // Default to safe if AI fails, to avoid blocking users
    return ['is_safe' => true];
}