#!/usr/bin/env node
/**
 * ObsiGate - Service Worker caching policy guards.
 *
 * Regression tests for the mobile/Cloudflare stale-load bug: the SW used
 * cache-first with a fixed cache name and wrong precache paths, so old JS kept
 * being served even after flushing the browser/Cloudflare caches (the SW Cache
 * Storage is a separate store). These tests read the source and assert the
 * network-first policy, versioned caches and corrected paths stay in place.
 *
 * Usage: node tests/frontend/sw.test.mjs
 */

import { strict as assert } from "node:assert";
import { readFileSync } from "node:fs";
import { fileURLToPath } from "node:url";
import path from "node:path";

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);
const FRONTEND = path.resolve(__dirname, "..", "..", "frontend");

const sw = readFileSync(path.join(FRONTEND, "sw.js"), "utf-8");
const indexHtml = readFileSync(path.join(FRONTEND, "index.html"), "utf-8");
const sync = readFileSync(path.join(FRONTEND, "js", "sync.js"), "utf-8");

let testCount = 0;
let passCount = 0;

function test(name, fn) {
  testCount++;
  try {
    fn();
    console.log(`  \u2713 ${name}`);
    passCount++;
  } catch (e) {
    console.log(`  \u2717 ${name}`);
    console.log(`      ${e.message}`);
  }
}

// ── Service worker ─────────────────────────────────────────────────────────
test("service worker uses a versioned cache name", () => {
  assert.ok(/const\s+SW_VERSION\s*=/.test(sw), "SW_VERSION constant present");
  assert.ok(sw.includes("obsigate-code-${SW_VERSION}"), "code cache is versioned");
  assert.ok(sw.includes("obsigate-runtime-${SW_VERSION}"), "runtime cache is versioned");
  assert.ok(sw.includes("obsigate-api-${SW_VERSION}"), "api cache is versioned");
});

test("legacy fixed cache name is gone", () => {
  assert.ok(!/obsigate-v1['"]/.test(sw), "must not keep the fixed obsigate-v1 cache name");
});

test("code/navigation requests are network-first", () => {
  assert.ok(/function\s+networkFirst\s*\(/.test(sw), "networkFirst strategy present");
  assert.ok(/isCodeRequest\s*\(/.test(sw), "code-request classifier present");
  // The fetch handler must route code requests through networkFirst.
  assert.ok(/isCodeRequest\([\s\S]*?networkFirst\(/.test(sw), "code requests use networkFirst");
  assert.ok(/request\.mode\s*===\s*['"]navigate['"]/.test(sw), "navigations are treated as code");
});

test("precache uses real /static paths", () => {
  assert.ok(sw.includes("'/static/js/app.js'"), "app.js precached at /static/js");
  assert.ok(sw.includes("'/static/style.css'"), "style.css precached at /static");
  assert.ok(!sw.includes("/frontend/js/"), "no stale /frontend/js path in precache");
});

test("precache failures are non-fatal", () => {
  assert.ok(/PRECACHE_URLS\.map[\s\S]*?\.catch\(/.test(sw), "per-URL catch so a 404 does not abort install");
});

test("worker activates immediately and claims clients", () => {
  assert.ok(sw.includes("skipWaiting()"), "skipWaiting present");
  assert.ok(sw.includes("clients.claim()"), "clients.claim present");
});

// ── index.html migration ───────────────────────────────────────────────────
test("index.html uses a one-time keyed migration, not a session kill-switch", () => {
  assert.ok(indexHtml.includes("obsigate-sw-migration"), "keyed migration guard present");
  assert.ok(!indexHtml.includes("_sw_killed"), "legacy session kill-switch removed");
  assert.ok(!/getRegistrations\(\)[\s\S]{0,200}unregister/.test(indexHtml), "does not unregister on every session");
});

// ── sync.js registration ───────────────────────────────────────────────────
test("sync.js reloads once when a new worker takes control", () => {
  assert.ok(sync.includes("controllerchange"), "controllerchange listener present");
  assert.ok(sync.includes("SKIP_WAITING"), "asks the waiting worker to activate");
});

console.log(`\n${passCount}/${testCount} service-worker tests passed`);
if (passCount !== testCount) {
  process.exit(1);
}