/**
 * Moderation helpers for comments and posts (Persian profanity + explicit cues).
 */

const PROFANITY_PATTERNS = [
  /\b(کس|کیر|کون|جنده|حروم|لاشی|بی\s*شعور|گه|گایید|گائید)\b/i,
  /\b(fuck|shit|bitch|asshole)\b/i,
];

const EXPLICIT_CONTENT_PATTERNS = [
  /\b(برهنگ|برهنگی|پورن|porn|nude|naked|sex)\b/i,
  /\b(سکس|جنسی\s*صریح)\b/i,
];

function normalizeText(text) {
  if (!text || typeof text !== 'string') return '';
  return text
    .replace(/[\u200c\u200f]/g, '')
    .replace(/\s+/g, ' ')
    .trim();
}

function matchesAny(text, patterns) {
  const normalized = normalizeText(text);
  if (!normalized) return false;
  return patterns.some((pattern) => pattern.test(normalized));
}

function containsProfanity(text) {
  return matchesAny(text, PROFANITY_PATTERNS);
}

function containsExplicitContent(text) {
  return matchesAny(text, EXPLICIT_CONTENT_PATTERNS);
}

/** Comment / vitrine / academy comment status */
function resolveCommentModerationStatus(text) {
  if (containsProfanity(text) || containsExplicitContent(text)) {
    return 'rejected';
  }
  return 'temp_accept';
}

/**
 * Post moderation:
 * - reject: profanity / explicit text in caption
 * - temp_accept: visible in app, awaits manual full approval
 */
function resolvePostModerationStatus({ caption, filePaths = [] }) {
  if (containsProfanity(caption) || containsExplicitContent(caption)) {
    return { status: 'reject', reason: 'caption_violation' };
  }

  return { status: 'temp_accept', reason: 'awaiting_review' };
}

module.exports = {
  containsProfanity,
  containsExplicitContent,
  resolveCommentModerationStatus,
  resolvePostModerationStatus,
};