/**
 * Generates dist/client/sitemap.xml after `vite build`.
 *
 * Static routes are listed explicitly; journal essay slugs are parsed from
 * src/data/catalog.ts so they stay in sync with the source of truth.
 * Dynamic product/collection pages are intentionally excluded for now —
 * they duplicate shop.mozimo.in content and churn constantly.
 *
 * Origin: SITE_ORIGIN env (default https://mozimo.in).
 */
import { readFileSync, writeFileSync, mkdirSync } from "node:fs";
import { join, dirname } from "node:path";
import { fileURLToPath } from "node:url";

const root = join(dirname(fileURLToPath(import.meta.url)), "..");
const origin = (process.env.SITE_ORIGIN ?? "https://mozimo.in").replace(
  /\/+$/,
  "",
);

const STATIC_ROUTES = [
  { path: "/", priority: 1.0, changefreq: "weekly" },
  { path: "/chocolate", priority: 0.9, changefreq: "weekly" },
  { path: "/gifting", priority: 0.9, changefreq: "weekly" },
  { path: "/experiences", priority: 0.7, changefreq: "monthly" },
  { path: "/bespoke", priority: 0.8, changefreq: "monthly" },
  { path: "/contact", priority: 0.5, changefreq: "yearly" },
  { path: "/our-world", priority: 0.6, changefreq: "monthly" },
  { path: "/journal", priority: 0.6, changefreq: "monthly" },
  { path: "/privacy", priority: 0.2, changefreq: "yearly" },
];

// journal essay slugs live in src/data/catalog.ts (the essays block)
const catalogSrc = readFileSync(join(root, "src/data/catalog.ts"), "utf8");
const slugs = [...catalogSrc.matchAll(/^\s{4}slug:\s*"([^"]+)"/gm)].map(
  (m) => m[1],
);

const today = new Date().toISOString().slice(0, 10);

const urls = [
  ...STATIC_ROUTES,
  ...slugs.map((slug) => ({
    path: `/journal/${slug}`,
    priority: 0.5,
    changefreq: "yearly",
  })),
];

const xml = [
  '<?xml version="1.0" encoding="UTF-8"?>',
  '<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">',
  ...urls.map(({ path, priority, changefreq }) =>
    [
      "  <url>",
      `    <loc>${origin}${path === "/" ? "/" : path}</loc>`,
      `    <lastmod>${today}</lastmod>`,
      changefreq ? `    <changefreq>${changefreq}</changefreq>` : null,
      priority !== undefined ? `    <priority>${priority}</priority>` : null,
      "  </url>",
    ]
      .filter(Boolean)
      .join("\n"),
  ),
  "</urlset>",
  "",
].join("\n");

const outDir = join(root, "dist/client");
mkdirSync(outDir, { recursive: true });
writeFileSync(join(outDir, "sitemap.xml"), xml, "utf8");
console.log(
  `[sitemap] ${urls.length} URLs → dist/client/sitemap.xml (origin ${origin})`,
);