import { spawnSync } from "node:child_process";

// Release each child's memory before starting the next expensive build phase.
// In particular, do not type-check while a compiled bundler is still resident.
function run(label, args, typechecked = false) {
  console.log(`[build:docker] ${label}`);
  const started = Date.now();
  const child = spawnSync(process.execPath, args, {
    stdio: "inherit",
    env: {
      ...process.env,
      NODE_OPTIONS: "--max-old-space-size=640",
      NEXT_TELEMETRY_DISABLED: "1",
      MINEGEO_DOCKER_TYPECHECKED: typechecked ? "1" : "0",
    },
  });
  if (child.error) throw child.error;
  if (child.status !== 0) {
    console.error(
      `[build:docker] ${label} failed (${child.signal || `exit ${child.status}`}).`,
    );
    process.exit(child.status || 1);
  }
  console.log(
    `[build:docker] ${label} finished in ${Math.round((Date.now() - started) / 1000)}s.`,
  );
}

run("Clean build cache", ["scripts/clean-build.mjs"]);
run("Generate route types", ["node_modules/next/dist/bin/next", "typegen"]);
run("Check TypeScript", [
  "node_modules/typescript/bin/tsc",
  "--noEmit",
  "--incremental",
  "false",
]);
// Type errors fail the preceding step. Only this invocation skips the duplicate
// check; regular npm run build still performs Next.js's normal type checking.
run(
  "Compile production application",
  ["node_modules/next/dist/bin/next", "build", "--webpack"],
  true,
);