import { mkdir } from "node:fs/promises";
import { builtinModules } from "node:module";
import path from "node:path";
import { fileURLToPath } from "node:url";
import { build } from "esbuild";

const apiDir = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "..");
const entryPoint = path.join(apiDir, "src/server.ts");
const outputFile = path.join(apiDir, "dist/server.js");
const nodeBuiltins = new Set([...builtinModules, ...builtinModules.map((moduleName) => `node:${moduleName}`)]);
const sourcemap = process.env.SOURCEMAP === "true" || process.env.BUILD_SOURCEMAPS === "true";

const externalizeRuntimeDependencies = {
  name: "externalize-runtime-dependencies",
  setup(buildContext) {
    buildContext.onResolve({ filter: /.*/ }, (args) => {
      if (nodeBuiltins.has(args.path)) {
        return { path: args.path, external: true };
      }

      if (isExternalRuntimePackage(args.path)) {
        return { path: args.path, external: true };
      }

      return undefined;
    });
  },
};

await mkdir(path.dirname(outputFile), { recursive: true });

await build({
  entryPoints: [entryPoint],
  outfile: outputFile,
  bundle: true,
  platform: "node",
  format: "esm",
  target: "node20",
  sourcemap,
  banner: {
    js: 'import { createRequire as __toolctrlCreateRequire } from "node:module"; const require = __toolctrlCreateRequire(import.meta.url);',
  },
  plugins: [externalizeRuntimeDependencies],
  logLevel: "warning",
});

function isBarePackageSpecifier(specifier) {
  return !specifier.startsWith(".") && !specifier.startsWith("/") && !specifier.startsWith("#");
}

function isExternalRuntimePackage(specifier) {
  if (!isBarePackageSpecifier(specifier)) {
    return false;
  }

  return (
    specifier === "@prisma/client" ||
    specifier.startsWith("@prisma/client/") ||
    specifier === "@prisma/adapter-pg" ||
    specifier.startsWith("@prisma/adapter-pg/") ||
    specifier === "jsonwebtoken" ||
    specifier.startsWith("jsonwebtoken/") ||
    specifier === "pino" ||
    specifier.startsWith("pino/")
  );
}