#!/usr/bin/env node
// For each module <= N with a reference/: copy reference + tests of modules 01..module into a temp dir, run tests.
// The card data (loaded by the references from Module 5) is staged as <dir>/cards: course/cards
// plus the cards/ of each module up to the one verified. Each tested module's levels/ (the
// puzzle levels its tests load, from Module 10) is staged as <dir>/levels.
import { cpSync, existsSync, mkdirSync, mkdtempSync, rmSync } from "node:fs";
import { spawnSync } from "node:child_process";
import { tmpdir } from "node:os";
import { basename, join } from "node:path";
import { cardDirs, moduleDirs, testFiles, fail } from "./lib.mjs";

// A staged reference has no node_modules, so TS installs the reference's own
// pinned devDependencies first (a bare `npx vitest` would fetch an unrelated version).
const DEFAULTS = {
  rust: "cargo test",
  ts: "npm install --no-audit --no-fund --loglevel=error && npx vitest run",
};

export function commandFor(lang, env = process.env) {
  return env[`VERIFY_CMD_${lang.toUpperCase()}`] || DEFAULTS[lang];
}

export function planVerification(mods, upTo) {
  return mods
    .filter((m) => Number(m.num) >= 1 && Number(m.num) <= upTo)
    .map((m) => ({
      ...m,
      langs: ["rust", "ts"].filter((l) => existsSync(join(m.path, "reference", l))),
      testModules: mods.filter((t) => Number(t.num) >= 1 && Number(t.num) <= Number(m.num)),
    }))
    .filter((p) => p.langs.length > 0);
}

export function stage(plan, lang) {
  const dir = mkdtempSync(join(tmpdir(), `verify-${plan.num}-${lang}-`));
  cpSync(join(plan.path, "reference", lang), dir, { recursive: true });
  mkdirSync(join(dir, "tests"), { recursive: true });
  for (const t of plan.testModules) {
    for (const f of testFiles(t.path, lang)) cpSync(f, join(dir, "tests", basename(f)));
    if (existsSync(join(t.path, "levels"))) cpSync(join(t.path, "levels"), join(dir, "levels"), { recursive: true });
  }
  for (const cards of cardDirs(plan.num)) cpSync(cards, join(dir, "cards"), { recursive: true });
  return dir;
}

if (import.meta.main) {
  const all = moduleDirs();
  const upTo = process.argv[2] ? Number(process.argv[2]) : Math.max(0, ...all.map((m) => Number(m.num)));
  const plans = planVerification(all, upTo);
  if (!plans.length) console.log("verify-references: no modules with reference/ up to " + upTo);
  let failed = false;
  for (const p of plans) {
    for (const lang of p.langs) {
      const dir = stage(p, lang);
      const r = spawnSync(commandFor(lang), { cwd: dir, shell: true, encoding: "utf8" });
      const ok = r.status === 0;
      failed ||= !ok;
      console.log(`module ${p.num}-${p.slug} [${lang}]: ${ok ? "ok" : "FAIL"}`);
      if (!ok) console.log((r.stdout || "") + (r.stderr || ""));
      rmSync(dir, { recursive: true, force: true });
    }
  }
  if (failed) process.exit(1);
}