import { cp, mkdir, readFile, readdir, rm, writeFile } from "node:fs/promises";
import { spawnSync } from "node:child_process";
import path from "node:path";

const fixtureRoot = path.resolve(".tmp/sample-removal");
const sampleRoot = path.resolve("src/sample/contract-fixture");
const sourceRoot = path.resolve("src");
const pnpmCli = /** @type {string} */ (process.env.npm_execpath);

/** @param {string} directory @returns {Promise<string[]>} */
async function sourceFiles(directory) {
  const entries = await readdir(directory, { withFileTypes: true });
  const nested = /** @type {string[][]} */ (await Promise.all(
    entries.map((entry) => {
      const target = path.join(directory, entry.name);
      return entry.isDirectory() ? sourceFiles(target) : [target];
    }),
  ));
  return nested.flat();
}

await rm(fixtureRoot, { recursive: true, force: true });
await mkdir(fixtureRoot, { recursive: true });

const incomingImports = [];
for (const sourceFile of await sourceFiles(sourceRoot)) {
  if (sourceFile.startsWith(sampleRoot)) continue;
  const content = await readFile(sourceFile, "utf8");
  if (/from\s+["'][^"']*sample\/contract-fixture/.test(content)) {
    incomingImports.push(path.relative(".", sourceFile));
  }
}

let buildStatus = 1;
if (incomingImports.length === 0) {
  await cp("src", path.join(fixtureRoot, "src"), {
    recursive: true,
    filter: (source) => !source.startsWith(sampleRoot),
  });
  await cp("public", path.join(fixtureRoot, "public"), { recursive: true });
  await cp("index.html", path.join(fixtureRoot, "index.html"));
  await cp("vite.config.js", path.join(fixtureRoot, "vite.config.js"));

  const result = spawnSync(
    process.execPath,
    [
      pnpmCli,
      "exec",
      "vite",
      "build",
      fixtureRoot,
      "--outDir",
      path.join(fixtureRoot, "dist"),
    ],
    { stdio: "inherit" },
  );
  buildStatus = result.status ?? 1;
}

await mkdir("artifacts/tests", { recursive: true });
const passed = incomingImports.length === 0 && buildStatus === 0;
await writeFile(
  "artifacts/tests/sample-removal.xml",
  `<?xml version="1.0" encoding="UTF-8"?>\n` +
    `<testsuite name="sample-removal" tests="2" failures="${passed ? 0 : 1}">` +
    `<testcase name="no-product-import"/>` +
    `<testcase name="production-build">${passed ? "" : "<failure/>"}</testcase>` +
    `</testsuite>\n`,
);
await rm(fixtureRoot, { recursive: true, force: true });

if (!passed) {
  process.stderr.write(
    `Sample removal failed. Incoming imports: ${incomingImports.join(", ")}\n`,
  );
  process.exit(1);
}
process.stdout.write("Sample removal smoke: PASS\n");