import console from "node:console";
import { existsSync, mkdtempSync, readFileSync, rmSync } from "node:fs";
import { tmpdir } from "node:os";
import { join, relative, resolve } from "node:path";
import { spawnSync } from "node:child_process";
import process from "node:process";

const root = resolve(import.meta.dirname, "..");
const source = join(root, "editors", "vscode", "src", "extension.js");
const destination = join(root, "editors", "vscode", "src", "extension.bundle.cjs");
const check = process.argv.includes("--check");
const temporary = check ? mkdtempSync(join(tmpdir(), "wrnexus-editor-extension-")) : null;
const output = temporary ? join(temporary, "extension.bundle.cjs") : destination;
try {
  const built = spawnSync(
    process.env.WRNEXUS_BUN_BINARY || "bun",
    ["build", source, "--target=node", "--format=cjs", "--external=vscode", `--outfile=${output}`],
    { cwd: root, encoding: "utf8" },
  );
  if (built.status !== 0)
    throw new Error(built.stderr || built.stdout || "extension bundle failed");
  if (check) {
    if (!existsSync(destination) || readFileSync(destination).compare(readFileSync(output)) !== 0)
      throw new Error(
        `${relative(root, destination)} is stale. Run bun run --cwd editors/vscode build.`,
      );
    console.log(`Verified ${relative(root, destination)} matches extension sources.`);
  } else console.log(`Built ${relative(root, destination)}.`);
} finally {
  if (temporary) rmSync(temporary, { recursive: true, force: true });
}