const { build } = require("esbuild");
const fs = require("fs");
const path = require("path");
const dotenv = require("dotenv");

// mongodb 的可选原生模块：打包时标记为 external，运行时不需要
const mongodbOptionals = [
  "kerberos",
  "mongodb-client-encryption",
  "@mongodb-js/zstd",
  "@aws-sdk/credential-providers",
  "snappy",
  "gcp-metadata",
  "aws4",
  "socks",
];

function cleanDist() {
  const distDir = path.resolve(__dirname, "dist");
  fs.rmSync(distDir, { recursive: true, force: true });
  fs.mkdirSync(distDir, { recursive: true });
}

function getEmbeddedEnvBanner() {
  const envPath = path.resolve(__dirname, ".env.gk");
  const envRaw = fs.existsSync(envPath) ? fs.readFileSync(envPath, "utf8") : "";
  const parsed = envRaw ? dotenv.parse(envRaw) : {};
  const payload = JSON.stringify(parsed);

  return [
    "(() => {",
    `  const embeddedEnv = ${payload};`,
    "  if (!process.env.NODE_ENV) process.env.NODE_ENV = 'gk';",
    "  for (const [key, value] of Object.entries(embeddedEnv)) {",
    "    if (process.env[key] == null || process.env[key] === '') process.env[key] = value;",
    "  }",
    "})();",
  ].join("\n");
}

cleanDist();

build({
  entryPoints: ["./transfer.js", "./corpid.js", "./replace-qrcode-url.js"],
  outdir: "./dist",
  entryNames: "[name]",
  platform: "node",
  bundle: true,
  minify: false,
  sourcemap: false,
  target: ["node18"],
  external: mongodbOptionals,
  banner: {
    js: getEmbeddedEnvBanner(),
  },
}).catch(() => process.exit(1));