#!/usr/bin/env bun
/**
 * Post-build processing for Vite build output.
 *
 * 1. Patch globalThis.Bun destructuring in third-party deps for Node.js compat
 * 2. Copy native addon files
 * 3. Bundle standalone scripts (download-ripgrep)
 * 4. Generate dual entry points (cli-bun.js, cli-node.js)
 */
import { readdir, readFile, writeFile, cp } from "node:fs/promises";
import { chmodSync } from "node:fs";
import { join } from "node:path";
import { execSync } from "node:child_process";

const outdir = "dist";

async function postBuild() {
  // Step 1: Patch globalThis.Bun destructuring from third-party deps
  const files = await readdir(outdir, { recursive: true });
  const BUN_DESTRUCTURE = /var \{([^}]+)\} = globalThis\.Bun;?/g;
  const BUN_DESTRUCTURE_SAFE =
    'var {$1} = typeof globalThis.Bun !== "undefined" ? globalThis.Bun : {};';

  let bunPatched = 0;
  for (const file of files) {
    const filePath = join(outdir, file);
    if (typeof file !== "string" || !file.endsWith(".js")) continue;
    const content = await readFile(filePath, "utf-8");
    if (BUN_DESTRUCTURE.test(content)) {
      await writeFile(
        filePath,
        content.replace(BUN_DESTRUCTURE, BUN_DESTRUCTURE_SAFE),
      );
      bunPatched++;
    }
    BUN_DESTRUCTURE.lastIndex = 0;
  }

  // Step 2: Copy native addon files
  const vendorDir = join(outdir, "vendor", "audio-capture");
  await cp("vendor/audio-capture", vendorDir, { recursive: true } as never);
  console.log(`Copied vendor/audio-capture/ → ${vendorDir}/`);

  // Step 3: Bundle standalone scripts via Bun.build (kept for simplicity)
  try {
    const { default: Bun } = await import("bun");
    const rgScript = await Bun.build({
      entrypoints: ["scripts/download-ripgrep.ts"],
      outdir,
      target: "node",
    });
    if (rgScript.success) {
      console.log(`Bundled download-ripgrep script to ${outdir}/`);
    } else {
      console.warn("Failed to bundle download-ripgrep script (non-fatal)");
    }
  } catch {
    // Bun not available — try esbuild fallback
    try {
      execSync(
        `npx esbuild scripts/download-ripgrep.ts --bundle --platform=node --outfile=${outdir}/download-ripgrep.js --format=esm`,
        { stdio: "inherit" },
      );
      console.log(`Bundled download-ripgrep script via esbuild to ${outdir}/`);
    } catch {
      console.warn(
        "Failed to bundle download-ripgrep script — skipping (non-fatal)",
      );
    }
  }

  // Step 4: Generate dual entry points
  const cliBun = join(outdir, "cli-bun.js");
  const cliNode = join(outdir, "cli-node.js");

  await writeFile(cliBun, '#!/usr/bin/env bun\nimport "./cli.js"\n');
  await writeFile(cliNode, '#!/usr/bin/env node\nimport "./cli.js"\n');

  chmodSync(cliBun, 0o755);
  chmodSync(cliNode, 0o755);

  console.log(
    `Post-build complete: patched ${bunPatched} Bun destructure, generated entry points`,
  );
}

postBuild().catch((err) => {
  console.error("Post-build failed:", err);
  process.exit(1);
});