const fs = require("fs");
const path = require("path");

const root = path.resolve(__dirname, "..");

function fail(message, error) {
  console.error(`[verify] ${message}`);
  if (error) {
    console.error(`[verify] ${error instanceof Error ? error.message : String(error)}`);
  }
  if (process.platform === "win32") {
    console.error("[verify] Retry with windows\\install.bat.");
    console.error("[verify] Native fallback: run C:\\Program Files\\nodejs\\install_tools.bat as Administrator.");
  }
  process.exit(1);
}

try {
  require("express");
} catch (error) {
  fail("Express could not be loaded.", error);
}

try {
  const Database = require("better-sqlite3");
  const db = new Database(":memory:");
  const row = db.prepare("SELECT 1 AS ok").get();
  db.close();
  if (row?.ok !== 1) {
    fail("SQLite verification query returned an unexpected result.");
  }
} catch (error) {
  fail("better-sqlite3 could not be loaded or initialized.", error);
}

for (const directory of ["data", "logs"]) {
  fs.mkdirSync(path.join(root, directory), { recursive: true });
}

if (process.platform === "win32") {
  const ammcDir = path.join(root, "AMMC", "windows64");
  const requiredFiles = ["ammc-amb.exe", "ammc.dll", "MyLapsSDK.dll"];
  const missingFiles = requiredFiles.filter((file) => !fs.existsSync(path.join(ammcDir, file)));
  if (missingFiles.length > 0) {
    fail(`Bundled AMMC runtime is incomplete: ${missingFiles.join(", ")}`);
  }
  console.log(`[verify] AMMC Windows runtime: ${ammcDir}`);
}

console.log(`[verify] Express and SQLite: OK (${process.platform}/${process.arch}, Node ${process.version})`);
console.log(`[verify] Installation is ready. Start with: ${process.platform === "win32" ? "npm.cmd start" : "npm start"}`);