import { test } from "node:test";
import assert from "node:assert/strict";
import { join } from "node:path";
import { run, fixtures } from "./helpers.mjs";
import { planVerification } from "../verify-references.mjs";
import { moduleDirs } from "../lib.mjs";

const root = join(fixtures, "course");

test("verify_plan_skips_modules_without_reference", () => {
  process.env.COURSE_ROOT = root;
  const plan = planVerification(moduleDirs(), 3);
  assert.deepEqual(plan.map((p) => p.num), ["01", "02", "03"]);
  assert.deepEqual(plan[2].testModules.map((m) => m.num), ["01", "02", "03"]);
  assert.deepEqual(plan[2].langs, ["rust", "ts"]);
});

test("verify_runs_with_copied_reference_and_tests", () => {
  const r = run("verify-references.mjs", ["02"], {
    COURSE_ROOT: root,
    VERIFY_CMD_RUST: "test -f tests/m01.rs && test -f Cargo.toml && ! test -f tests/m03.rs",
    VERIFY_CMD_TS: "test -f tests/m01.test.ts && test -f package.json",
  });
  assert.equal(r.code, 0, r.out);
  assert.match(r.out, /01.*ok/s);
  assert.match(r.out, /02.*ok/s);
});

test("verify_reports_failure", () => {
  const r = run("verify-references.mjs", ["01"], {
    COURSE_ROOT: root,
    VERIFY_CMD_RUST: "false",
    VERIFY_CMD_TS: "true",
  });
  assert.equal(r.code, 1);
  assert.match(r.out, /FAIL/);
});

test("verify_stage_copies_all_earlier_module_tests", async () => {
  process.env.COURSE_ROOT = root;
  const { planVerification, stage } = await import("../verify-references.mjs");
  const { existsSync } = await import("node:fs");
  const plan = planVerification(moduleDirs(), 3)[2];
  const dir = stage(plan, "rust");
  for (const f of ["m01.rs", "m02.rs", "m03.rs"]) assert.ok(existsSync(join(dir, "tests", f)));
  assert.ok(existsSync(join(dir, "Cargo.toml")));
});

test("verify_ts_default_installs_dependencies_first", async () => {
  // A staged reference has no node_modules; a bare `npx vitest` fetches the
  // latest vitest, which cannot load the reference's vitest.config.ts.
  const { commandFor } = await import("../verify-references.mjs");
  const cmd = commandFor("ts", {});
  assert.match(cmd, /^npm (ci|install)\b.*&& npx vitest run$/);
  assert.equal(commandFor("ts", { VERIFY_CMD_TS: "true" }), "true");
  assert.equal(commandFor("rust", {}), "cargo test");
});