import { cache } from 'react';
import { getPayload } from 'payload';
import { resolveRoute as resolveRouteRaw, getArchiveEntries } from '../content/index.js';
import { buildSitemapEntries, buildRobots } from '../seo/index.js';
/**
 * Bundles the per-request data helpers a frontend needs — the same cached
 * wrappers every project was writing by hand (getPayload, settings, locale
 * list, route resolution, archive entries).
 *
 * Everything is wrapped in React `cache()`, so within one request a value is
 * fetched once no matter how many times it's asked for — which matters because
 * Next runs generateMetadata and the page component separately, and both hit
 * these. Crucially the Payload instance is cached *here*, once, so every helper
 * shares it; that's why this is a factory and not loose functions importing a
 * shared module.
 *
 * ```ts
 * // src/lib/content.ts
 * import { createContentHelpers } from 'ipal-kit'
 * import config from '@/payload.config'
 * import { contentConfig } from '@/content.config'
 *
 * export const { getCachedPayload, getSettings, getConfiguredLocales, resolveRoute, getEntries } =
 *   createContentHelpers({ config, content: contentConfig })
 * ```
 *
 * `resolveRoute` and `getEntries` are separate on purpose: routing decides what
 * a URL is, fetching gets the listing. Metadata generation needs the first and
 * not the second, and a page component composes them in two obvious lines.
 */ export function createContentHelpers({ config, content, settingsSlug = 'site-settings', pagesSlug = 'pages', i18n, baseUrl }) {
    const origin = baseUrl ?? process.env.NEXT_PUBLIC_SERVER_URL ?? '';
    const getCachedPayload = cache(async ()=>getPayload({
            config: await config
        }));
    const getConfiguredLocales = cache(async ()=>{
        const c = await config;
        return c.localization ? c.localization.locales.map((l)=>l.code) : [];
    });
    const getSettings = cache(async (locale)=>{
        const payload = await getCachedPayload();
        return payload.findGlobal({
            slug: settingsSlug,
            locale: locale,
            depth: 2
        });
    });
    /** What does this URL point at? Routing only — no listing data. */ const resolveRoute = cache(async (locale, segments, page)=>{
        const payload = await getCachedPayload();
        return resolveRouteRaw({
            payload,
            locale,
            segments,
            page,
            content,
            pagesSlug,
            settingsSlug
        });
    });
    /** One page of a collection's entries, for an archive listing. */ const getEntries = cache(async (collection, locale, page, perPage)=>{
        const payload = await getCachedPayload();
        return getArchiveEntries({
            payload,
            collection,
            locale,
            page,
            perPage
        });
    });
    /**
   * Ready-made handler for Next's `app/sitemap.ts` — every page and entry with
   * per-URL hreflang and lastmod. Re-export it directly:
   *
   * ```ts
   * // app/sitemap.ts
   * export { sitemap as default } from '@/lib/content'
   * export const dynamic = 'force-dynamic'  // generate at runtime, not build
   * ```
   *
   * IMPORTANT — container deploys (Coolify/Docker/Railway/CI): Next treats
   * sitemap.ts as STATIC by default and prerenders it during `next build`, which
   * calls into Payload → the database. The build container usually has no access
   * to the internal Docker network, so the DB connection fails (ENOTFOUND) and
   * the build dies. Two defenses:
   *   1. `export const dynamic = 'force-dynamic'` in app/sitemap.ts — skips build
   *      prerender, generates at runtime when the DB is reachable (recommended).
   *   2. This handler also catches DB errors and returns [] so that even without
   *      (1) the build won't crash — it just ships an empty sitemap until the
   *      next runtime regeneration. (1) is still preferred; (2) is a safety net.
   */ const sitemap = cache(async ()=>{
        if (!i18n) {
            throw new Error('[ipal] createContentHelpers: pass `i18n` to use the sitemap handler.');
        }
        try {
            return await buildSitemapEntries({
                payload: await getCachedPayload(),
                config: i18n,
                baseUrl: origin,
                content,
                pagesSlug,
                settingsSlug
            });
        } catch (error) {
            // DB unreachable (typically a container build with no DB network) — return
            // an empty sitemap instead of failing the build. Runtime regeneration will
            // produce the real one once the DB is reachable. See dynamic='force-dynamic'.
            console.warn('[ipal] sitemap: could not reach the database, returning empty entries ' + "(add `export const dynamic = 'force-dynamic'` to app/sitemap.ts to " + 'generate at runtime and avoid build-time DB access):', error);
            return [];
        }
    });
    /**
   * Ready-made handler for Next's `app/robots.ts`. Re-export directly:
   *
   * ```ts
   * // app/robots.ts
   * export { robots as default } from '@/lib/content'
   * ```
   */ const robots = ()=>buildRobots({
            baseUrl: origin
        });
    return {
        getCachedPayload,
        getConfiguredLocales,
        getSettings,
        resolveRoute,
        getEntries,
        sitemap,
        robots
    };
}

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