import { join, resolve } from "node:path";
import schema, { type Config } from "./schema";

export const ENVIRONMENT = Bun.env.NODE_ENV || "development";
export const IS_PROD = ENVIRONMENT === "production";
export const CONFIG_PATH = getConfigPath();

function getConfigPath() {
  let envPath = Bun.env.CONFIG_FILE;
  if (envPath) {
    envPath = envPath
      .replaceAll("{ENVIRONMENT}", ENVIRONMENT)
      .replaceAll("{ENV}", ENVIRONMENT);

    return resolve(envPath);
  }

  return join(
    import.meta.dir,
    "..",
    "environments",
    `config.${ENVIRONMENT}.json`,
  );
}

async function loadConfig(): Promise<Config> {
  const file = Bun.file(CONFIG_PATH);
  if (!(await file.exists())) {
    console.error(`[!] couldn't find a config file at ${CONFIG_PATH}`);
    process.exit(1);
  }

  const json = await file.json();
  const parsed = schema.safeParse(json);

  if (parsed.success) return parsed.data;

  console.error("[!] failed to parse config:");

  const longestPath = Math.max(
    ...parsed.error.issues.map((err) => err.path.join(".").length),
  );
  for (const err of parsed.error.issues) {
    const path = err.path.join(".");
    console.error(
      ` * ${path.padEnd(longestPath)}   ${err.message} (${err.code})`,
    );
  }
  process.exit(1);
}

const config = await loadConfig();
export default config;