import 'server-only';

import type { Metadata } from 'next';

export const SITE_URL = process.env.NEXT_PUBLIC_SITE_URL || 'https://pazaryonetimi.com';
export const SITE_NAME = 'Pazaryonetimi';
export const DEFAULT_OG_IMAGE = `${SITE_URL}/og-image.png`;

export function absoluteUrl(path: string): string {
  if (path.startsWith('http')) return path;
  return `${SITE_URL}${path.startsWith('/') ? path : `/${path}`}`;
}

export function buildPageMetadata({
  title,
  description,
  path,
  keywords,
  noIndex = false,
  ogType = 'website',
  ogImage,
}: {
  title: string;
  description: string;
  path: string;
  keywords?: string[];
  noIndex?: boolean;
  ogType?: 'website' | 'article';
  ogImage?: string;
}): Metadata {
  const canonical = absoluteUrl(path);
  const image = ogImage || DEFAULT_OG_IMAGE;

  return {
    title,
    description,
    keywords,
    alternates: { canonical },
    robots: noIndex
      ? { index: false, follow: false }
      : { index: true, follow: true },
    openGraph: {
      type: ogType,
      locale: 'tr_TR',
      url: canonical,
      siteName: SITE_NAME,
      title,
      description,
      images: [{ url: image, width: 1200, height: 630, alt: title }],
    },
    twitter: {
      card: 'summary_large_image',
      title,
      description,
      images: [image],
    },
  };
}

export function truncateForMeta(text: string, max: number): string {
  const clean = text.replace(/\s+/g, ' ').trim();
  if (clean.length <= max) return clean;
  return `${clean.slice(0, max - 3).trimEnd()}...`;
}