import { existsSync, mkdirSync, statSync, writeFileSync } from "node:fs";
import path from "node:path";
import { spawnSync } from "node:child_process";
import { fileURLToPath } from "node:url";

const rootDir = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "..");
const srcFile = path.join(rootDir, "native/macos/window-effects.mm");
const outFile = path.join(rootDir, "src/bun/libMacWindowEffects.dylib");

function createPlaceholder() {
  mkdirSync(path.dirname(outFile), { recursive: true });
  writeFileSync(outFile, "");
  console.log(`build-macos-effects: created placeholder dylib at ${outFile}`);
}

if (process.platform !== "darwin") {
  createPlaceholder();
  process.exit(0);
}

if (!existsSync(srcFile)) {
  console.error(`build-macos-effects: missing source file ${srcFile}`);
  process.exit(1);
}

mkdirSync(path.dirname(outFile), { recursive: true });

const result = spawnSync(
  "xcrun",
  [
    "clang++",
    "-dynamiclib",
    "-fobjc-arc",
    "-framework",
    "Cocoa",
    srcFile,
    "-o",
    outFile,
  ],
  { cwd: rootDir, stdio: "inherit" },
);

if (result.status !== 0) {
  process.exit(result.status ?? 1);
}

const { size } = statSync(outFile);
console.log(`build-macos-effects: built ${outFile} (${size} bytes)`);