// src/lib/siteSettings.ts
// ─────────────────────────────────────────────────────────────────────────────
// Server-only loader for site-wide settings (branding, footer, social).
// Reads the SiteSetting key-value table and merges with defaults.
//
// For pure types and defaults safe to import from client components,
// use src/lib/siteSettingsTypes.ts instead.
// ─────────────────────────────────────────────────────────────────────────────

import "server-only";
import { prisma } from "@/lib/prisma";
import { getLocalizedData } from "@/lib/i18nHelper";
import {
  DEFAULT_BRANDING,
  DEFAULT_FOOTER,
  DEFAULT_SOCIAL,
  type BrandingSettings,
  type FooterSettings,
  type SocialSettings,
} from "@/lib/siteSettingsTypes";

export {
  DEFAULT_BRANDING,
  DEFAULT_FOOTER,
  DEFAULT_SOCIAL,
  type BrandingSettings,
  type FooterSettings,
  type SocialSettings,
};

function safeParse<T>(json: string | null | undefined, fallback: T): T {
  if (!json) return fallback;
  try {
    return JSON.parse(json) as T;
  } catch {
    return fallback;
  }
}

async function readSetting<T>(key: string, defaults: T, locale?: string): Promise<T> {
  try {
    const row = await prisma.siteSetting.findUnique({ where: { key } });
    if (!row) return defaults;

    const localized = locale ? getLocalizedData(row, locale) : row;
    const value = safeParse<Partial<T>>(localized.valueJson, {} as Partial<T>);
    return { ...defaults, ...value };
  } catch (error) {
    console.error(`[siteSettings] Failed to read "${key}":`, error);
    return defaults;
  }
}

export const getBranding = (locale?: string) =>
  readSetting<BrandingSettings>("branding", DEFAULT_BRANDING, locale);

export const getFooterSettings = (locale?: string) =>
  readSetting<FooterSettings>("footer", DEFAULT_FOOTER, locale);

export const getSocialLinks = (locale?: string) =>
  readSetting<SocialSettings>("social", DEFAULT_SOCIAL, locale);

export async function getAllSettings() {
  const [branding, footer, social] = await Promise.all([
    getBranding(),
    getFooterSettings(),
    getSocialLinks(),
  ]);
  return { branding, footer, social };
}