#!/usr/bin/env node
/**
 * Generate the site's read-only service catalog from the API's single source.
 *
 * Source : api/src/service-catalog.ts  (COMPLIANCE_SERVICES -- the authority)
 * Output : site/src/lib/service-catalog.generated.ts  (SERVICE_META for display)
 *
 * Run automatically before the site build (site `prebuild` script). Never edit
 * the generated file by hand. To change a price or name, edit the API catalog.
 *
 * We import the API module directly (it is plain TS with a literal object), via
 * a tiny transpile-free parse: the catalog is a static object literal, so we
 * evaluate it in a sandboxed module context.
 */
import { readFileSync, writeFileSync } from "node:fs";
import { fileURLToPath } from "node:url";
import { dirname, resolve } from "node:path";

const __dirname = dirname(fileURLToPath(import.meta.url));
const ROOT = resolve(__dirname, "..");
const SRC = resolve(ROOT, "api/src/service-catalog.ts");
const OUT = resolve(ROOT, "site/src/lib/service-catalog.generated.ts");

const tsSource = readFileSync(SRC, "utf8");

// Extract the object literal assigned to COMPLIANCE_SERVICES.
const m = tsSource.match(/export const COMPLIANCE_SERVICES[^=]*=\s*(\{[\s\S]*?\n\});/);
if (!m) {
  console.error("[gen-service-catalog] could not locate COMPLIANCE_SERVICES object literal in", SRC);
  process.exit(1);
}
// The object literal is valid JS (string keys, number/bool/string values, trailing commas).
// Evaluate it safely in an isolated function scope (no access to anything).
let catalog;
try {
  catalog = Function(`"use strict"; return (${m[1]});`)();
} catch (e) {
  console.error("[gen-service-catalog] failed to evaluate catalog literal:", e);
  process.exit(1);
}

const slugs = Object.keys(catalog).sort();
const lines = slugs.map((slug) => {
  const s = catalog[slug];
  const parts = [`name: ${JSON.stringify(s.name)}`, `price_cents: ${s.price_cents}`];
  if (s.gov_fee_label) parts.push(`gov_fee_label: ${JSON.stringify(s.gov_fee_label)}`);
  return `  ${JSON.stringify(slug)}: { ${parts.join(", ")} },`;
});

const out = `/**
 * AUTO-GENERATED -- DO NOT EDIT.
 *
 * Source of truth: api/src/service-catalog.ts (COMPLIANCE_SERVICES).
 * Regenerate with: node scripts/gen-service-catalog.mjs (runs on site prebuild).
 *
 * Display-only subset (name, price_cents, gov_fee_label) of the API catalog,
 * so the public site can never drift from what the API actually charges.
 */

export interface ServiceMeta {
  name: string;
  price_cents: number;
  gov_fee_label?: string;
}

export const SERVICE_META: Record<string, ServiceMeta> = {
${lines.join("\n")}
};
`;

writeFileSync(OUT, out);
console.log(`[gen-service-catalog] wrote ${slugs.length} services -> ${OUT}`);